阅读说明：本技术 磁感应器、包括该磁感应器的电磁泵以及制造磁感应器的方法 (Magnetic inductor, electromagnetic pump comprising such a magnetic inductor, and method for producing a magnetic inductor ) 是由 S·维特里 于 2018-11-19 设计创作，主要内容包括：本发明涉及一种用于电磁泵(1)的磁感应器(100),该磁感应器(100)通过包含至少两个相位(P1,P2,P3)的多相电流供电,该磁感应器(100)包括：磁感应器主体(101)；以及对于多相电流的相位(P1,P2,P3)中的每个相位的N对(110<Sub>1,2,..,N-1,N</Sub>,120<Sub>1,2,..,N-1,N</Sub>,130<Sub>1,2,..,N-1,N</Sub>)的基本线圈(111<Sub>1,2,..,N-1,N</Sub>,112<Sub>1,2,..,N-1,N</Sub>,121<Sub>1,2,..,N-1,N</Sub>,122<Sub>1,2,..,N-1,N</Sub>,131<Sub>1,2,..,N-1,N</Sub>,132<Sub>1,2,..,N-1,N</Sub>),其具有相同的绕线方向彼此相继。与所述相位相关联的基本线圈(111<Sub>1,2,..,N-1,N</Sub>,112<Sub>1,2,..,N-1,N</Sub>,121<Sub>1,2,..,N-1,N</Sub>,122<Sub>1,2,..,N-1,N</Sub>,131<Sub>1,2,..,N-1,N</Sub>,132<Sub>1,2,..,N-1,N</Sub>)之间的连接如下：对于第一对至第N-对(110<Sub>1,2,..,N-1</Sub>,120<Sub>1,2,..,N-1</Sub>,130<Sub>1,2,..,N-1</Sub>)中的每一对,第一基本线圈和第二基本线圈(111<Sub>1,2,..,N-1,N</Sub>,112<Sub>1,2,..,N-1,N</Sub>,121<Sub>1,2,..,N-1,N</Sub>,122<Sub>1,2,..,N-1,N</Sub>,131<Sub>1,2,..,N-1,N</Sub>,132<Sub>1,2,..,N-1,N</Sub>)的端(I,O)之一连接至紧随其后的相同类型的基本线圈(111<Sub>1,2,..,N-1,N</Sub>,112<Sub>1,2,..,N-1,N</Sub>,121<Sub>1,2,..,N-1,N</Sub>,122<Sub>1,2,..,N-1,N</Sub>,131<Sub>1,2,..,N-1,N</Sub>,132<Sub>1,2,..,N-1,N</Sub>)的相同类型的一端。(The invention relates to a magnetic inductor (100) for an electromagnetic pump (1), the magnetic inductor (100) being supplied by a multiphase current comprising at least two phases (P1, P2, P3), the magnetic inductor (100) comprising: a magnetic inductor main body (101); and N pairs (110) for each of the phases (P1, P2, P3) of the multi-phase current 1，2，..，N‑1，N ，120 1，2，..，N‑1，N ，130 1，2，..，N‑1，N ) Of the basic coil (111) 1，2，..，N‑1，N ，112 1，2，..，N‑1，N ，121 1，2，..，N‑1，N ，122 1，2，..，N‑1，N ，131 1，2，..，N‑1，N ，132 1，2，..，N‑1，N ) Which have the same winding direction one after the other. A base coil (111) associated with the phase 1，2，..，N‑1，N ，112 1，2，..，N‑1，N ，121 1，2，..，N‑1，N ，122 1，2，..，N‑1，N ，131 1，2，..，N‑1，N ，132 1，2，..，N‑1，N ) The connections between are as follows: for the first to the N-th pairs (110) 1，2，..，N‑1 ，120 1，2，..，N‑1 ，130 1，2，..，N‑1 ) Of the pair of first and second basic coils (111) 1，2，..，N‑1，N ，112 1，2，..，N‑1，N ，121 1，2，..，N‑1，N ，122 1，2，..，N‑1，N ，131 1，2，..，N‑1，N ，132 1，2，..，N‑1，N ) Is connected to the immediately following basic coil (111) of the same type 1，2，..，N‑1，N ，112 1，2，..，N‑1，N ，121 1，2，..，N‑1，N ，122 1，2，..，N‑1，N ，131 1，2，..，N‑1，N ，132 1，2，..，N‑1，N ) Of the same type of end.)

1. A magnetic inductor (100) for an electromagnetic pump (1), the magnetic inductor (100) being intended to be powered by a multiphase current comprising at least two phases (P1, P2, P3),

the magnetic inductor (100) comprises:

-a magnetic inductor body (101) extending in a longitudinal direction;

-N pairs (110) for each of the phases (P1, P2, P3) of the multiphase current₁，_{2，..，N-1，N}，120_{1，2，..，N-1，N}，130_{1，2，..，N-1，N}) Basic coil (111)_{1，2，..，N-1，N}，112₁，_{2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}) From a first pair (110) along the magnetic inductor body (101) with the same winding direction₁，120₁，130₁) To the Nth pair (110)_N，120_N，130_N) Each pair (110) being successive to each other, N being an integer greater than or equal to 2_{1，2，..，N-1，N}，120_{1，2，..，N-1，N}，130_{1，2，..，N-1，N}) Comprising a first and a second basic coil (111) that follow one another along the magnetic inductor body (101)_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132₁，_{2，..，N-1，N}) Each basic coil (111)_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}) Comprising two terminals (I, O), one of which is an input terminal (I) and the other is an output terminal (O),

wherein the basic coils (111) form a pair_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}) Distributed along the magnetic inductor body (101) so as to provide phase alternation and to provide a magnetic field sliding along the magnetic inductor body (101),

the magnetic inductor (100) is characterized in that, for each of the phases (P1, P2, P3), the basic coil (111) associated with that phase is associated with_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}) The connections between are as follows:

-said first pair (110)₁，120₁，130₁) The first and second basic coils (111) of₁，112₁，121₁，122₁，131₁，132₁) One of the current input and the current output intended to be connected to the phase (P1, P2, P3) and the other of said current input and said current output of the phase (P1, P2, P3), respectively;

-for the first to the N-1 th pairs (110)_{1，2，..，N-1}，120_{1，2，..，N-1}，130_{1，2，..，N-1}) Of the first basic coil (111)_{1，2，..，N-1}，121_{1，2，..，N-1}，131_{1，2，..，N-1}) Is connected to the first basic coil (111) immediately following along the magnetic field inductor body (101)_{1，2，..，N-1}，121_{1，2，..，N-1}，131_{1，2，..，N-1}) One end of the same type of (1);

-for the second to Nth pairs (110)_{2，..，N-1，N}，120_{2，..，N-1，N}，130_{2，..，N-1，N}) Of the second base coil (112)_{2，..，N-1，N}，122_{2，..，N-1，N}，132_{2，..，N-1，N}) Is connected to the second basic coil (112) directly preceding it along the magnetic inductor body (101)_{2，..，N-1，N}，122_{2，..，N-1，N}，132_{2，..，N-1，N}) One end of the same type of (1); and

-for the nth pair, the first and second base coils are connected in series.

2. The magnetic inductor (100) of claim 1, wherein the magnetic inductor body (101) comprises a delimiting surface intended to face a passage of the electromagnetic pump,

and wherein the magnetic inductor body (101) comprises on its delimiting surface a plurality of lateral grooves (102), the plurality of lateral grooves (102) being consecutive to each other along the magnetic inductor body (101), and wherein the basic coil (111) is accommodated_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122₁，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N})。

3. The magnetic inductor (100) of claim 2, wherein the connection to another base coil (111) is made_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122₁，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}) The basic coil of (a)111_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122₁，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}) Are connected by respective electrical conductors (118, 119) extending along the delimiting surface.

4. The magnetic inductor (100) of claim 3, wherein the magnetic inductor body (101) further comprises a longitudinal groove on its surface, in which an electrical conductor (118, 119) is accommodated, at least a part of the coils being connected together by the electrical conductor (118, 119).

5. The magnetic inductor (100) of any one of claims 1 to 3, wherein the magnetic inductor body (101) comprises a plurality of magnetic plates extending along a main axis and having a cross section in the shape of an involute of a circle, the magnetic plates being interlocked with the circles of involutes of their circles merged together, the circles of involutes of the circles merged together in the shape of a tube extending longitudinally along the main axis, the tube forming the magnetic inductor body (101).

6. The magnetic inductor (100) according to any of claims 1 to 5, wherein the magnetic inductor (100) is an internal magnetic inductor intended to define an inner wall of a channel of the electromagnetic pump (1) with a protective tube.

7. The magnetic inductor (100) according to any of claims 1 to 5, wherein the magnetic inductor (100) is an external magnetic inductor intended to define an outer wall of a channel of the electromagnetic pump (1) with a protective tube.

8. An electromagnetic pump comprising a first magnetic inductor (100) according to claim 6.

9. An electromagnetic pump (1) comprising a first magnetic inductor (100) according to claim 7.

10. The electromagnetic pump (1) of claim 8, further comprising a second inductor according to claim 7.

11. Method of manufacturing a magnetic inductor (100) for an electromagnetic pump (1), the magnetic inductor (100) being intended to be powered by a multiphase current comprising several phases (P1, P2, P3), the method being characterized in that it comprises the steps of:

-providing a magnetic inductor body (101),

-providing and connecting N pairs of elementary coils (111) for each phase of the multi-phase current_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}) Said N pairs of elementary coils having the same winding direction, along said magnetic inductor body (101) from a first pair (110)₁，120₁，130₁) To the Nth pair (110)_N，120_N，130_N) Successive to each other, N being an integer greater than or equal to 2, said pair (110)_{1，2，..，N-1，N}，120_{1，2，..，N-1，N}，130_{1，2，..，N-1，N}) Comprises a first and a second basic coil (111) that are successive to each other along the magnetic inductor body (101)_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}) Each basic coil (111)_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}) Comprising two terminals (I, O), one of which is an input-type terminal (I) and the other of which is an output-type terminal (O), for each of said phases (P1, P2, P3):

first pair (110)₁，120₁，130₁) The first and second basic coils (111) of₁，121₁，131₁，112₁，122₁，132₁) One of the current input and the current output intended to be connected to the phase (P1, P2, P3) and the other of the current input and the current output of the phase (P1, P2, P3), respectively;

for the first to N-1 pairs (110)_{1，2，..，N-1}，120_{1，2，..，N-1}，130_{1，2，..，N-1}) Of the first basic coil (111)_{1，2，..，N-1}，121_{1，2，..，N-1}，131_{1，2，..，N-1}) Is connected to the first basic coil (111) immediately following along the magnetic field inductor body (101)_{1，2，..，N-1}，121_{1，2，..，N-1}，131_{1，2，..，N-1}) One end of the same type of (1);

for the second to Nth pairs (110)_{2，..，N-1，N}，120_{2，..，N-1，N}，130_{2，..，N-1，N}) Of the second base coil (112)_{2，..，N-1，N}，122_{2，..，N-1，N}，132_{2，..，N-1，N}) Is connected to the second basic coil (112) directly preceding it along the magnetic inductor body (101)_{2，..，N-1，N}，122_{2，..，N-1，N}，132_{2，..，N-1，N}) One end of the same type of (1); and

for the Nth pair (110)_N，120_N，130_N) Said first and said second basic coils (111)_N，121_N，131_N，112_N，122_N，132_N) Are connected in series.

12. The method of manufacturing an inductor according to claim 11, wherein the magnetic inductor body (101) comprises a plurality of magnetic plates extending along a main axis and having a cross section in the shape of an involute of a circle, the step of providing a magnetic inductor body (101) comprising the sub-steps of:

-providing a plurality of identical magnetic plates (103), each of said magnetic plates (130) extending along a main axis (301) and having a cross section in the shape of an involute of a circle;

-assembling said plurality of magnetic plates (103) by interlocking to form said magnetic inductor body (101), the circles of involutes of the circles of said magnetic plates (103) merging together.

13. The method of manufacturing an inductor according to claim 12, wherein the step of providing a magnetic inductor body (101) further comprises the sub-steps of:

-cutting transversal grooves 102 in the longitudinal surfaces of the inner and outer longitudinal surfaces of the tubular body, so as to form a longitudinal groove for the elementary coils (111)_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}) The housing portion of (a) is formed,

and wherein said step of providing and connecting comprises the sub-steps of:

-providing a basic coil (111)_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N})，

-coupling the basic coil (111)_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}) Is placed in the transverse groove (102) formed during the cutting step.

Technical Field

The invention relates to the field of annular electromagnetic pumps and magnetic inductors equipped therewith.

The object of the invention is therefore a magnetic inductor, an electromagnetic pump comprising such a magnetic inductor and a method of manufacturing such a magnetic inductor.

Background

In order to optimize the pumping capacity of the ring-shaped electromagnetic pumps, it is known to equip them with two magnetic inductors, one being an internal magnetic inductor, which with a protective tube delimits the inner wall of the channel of the electromagnetic pump, and the other being an external magnetic inductor, which with a protective tube delimits the outer wall of the channel.

Thus, as shown in fig. 1A and starting from the central axis 301 of the electromagnetic pump 1, such an electromagnetic pump 1 comprises:

an internal magnetic inductor 100 comprising a plurality of first elementary coils 111, 121, 131;

-an inner protective tube 310;

-a channel 320;

-an outer protective tube 330;

an external magnetic inductor 200 comprising a plurality of second elementary coils 211, 221, 231.

For each of the internal magnetic inductor 100 and the external magnetic inductor 200, the basic coils 111, 121, 131, 211, 221, 231 follow one another along the central axis 301 of the electromagnetic pump 1. In order to generate a magnetic field sliding along the main axis, the basic coils 111, 121, 131, 211, 221, 231 of the internal magnetic inductor 100 and the external magnetic inductor 200 are supplied with a polyphase current with a suitable coupling diagram (coupling diagram), shown in fig. 1A as a three-phase current. Thus, as can be seen from fig. 1A, for the external magnetic inductor 200, the basic coils 111, 121, 131, 211, 221, 231 are respectively and alternatively powered from left to right by phase 2, phase 3 and phase 1. In the same way and in order to simulate a six-phase power supply, the winding directions of the elementary coils 111, 121, 131, 211, 221, 231 are also alternated, which is shown in fig. 1A by the minus sign indicated before the reference sign of the phase.

This coupling and this alternation of the winding directions of the basic coils 111, 121, 131, 211, 221, 231 makes the installation of the magnetic inductors 100, 200 relatively complex. This is particularly true for an internal magnetic inductor 100 in which the connection of the basic coils 111, 121, 131 takes place in the central cavity of the magnetic body 101 of the internal magnetic inductor 100, as described in document EP 0606972.

As shown in fig. 1B and in the usual configuration of the magnetic inductors 100, 200, the basic coils 111, 121, 131, 211, 221, 231 are usually supplied in pairs, making this installation more complicated. Thus, in this configuration, for each of the phases of the multiphase current, the magnetic inductor 100, 200 comprises N pairs of basic coils 111, 121, 131, 211, 221, 231, the N pairs of basic coils 111, 121, 131, 211, 221, 231 being paired after one another along the magnetic inductor body 101, 201 from a first pair to an nth pair, each pair of paired basic coils 111, 121, 131, 211, 221, 231 comprising a first basic coil 111, 121, 131 and a second basic coil 211, 221, 231, one after the other along the inductor body 101, 201, each basic coil 111, 121, 131, 211, 221, 231 comprising two ends, one of which is an input-type end and the other of which is an output-type end.

Fig. 2 and 3 schematically show that such a basic coil 111 is currently available_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}In a paired configuration 110_{1，2，..，N-1，N}，120_{1，2，..，N-1，N}，130_{1，2，..，N-1，N}The type of coupling used in the magnetic inductor of (1). In both figures, the primary coil 111 is along the central axis 301_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}Is shown with artificial offsets on three levels, each level representing the basic coil 111 of the phases P1, P2, P3_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}Is coupled. Fig. 2, 3 also show, by means of arrows and respectively indicated by the reference signs I and O, each elementary coil 111_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}Input I and output O of (a) show the winding direction.

Fig. 2 shows the coupling of the basic coils, which is referred to as an "indirect series" coupling. In this coupling, for each of the phases P1, P2, P3:

basic coil 111_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}Along the central axis 301 in the pair 110_{1，2，..，N-1，N}，120_{1，2，..，N-1，N}，130_{1，2，..，N-1，N}Alternating;

basic coil 111_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}Connected in series along the central axis 301, which applies to both basic coils 111 in the same pair_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}And applies to two subsequent pairs 110_{1，2，..，N-1，N}，120_{1，2，..，N-1，N}，130_{1，2，..，N-1，N}Two basic coils 111_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}。

A first basic coil 111₁、121₁、131₁And a last basic coil 112_{1，2，..，N-1，N}、122_{1，2，..N-1，N}、132_{1，2，..，N-1，N}Current inputs and current outputs connected to the phases P1, P2, P3, respectively.

In this configuration, the links between the basic coils of the same phase P1, P2, P3 are obtained by three types of conductors 113, 114, 115:

a first type conductor 113 connecting identical pairs 110 in series_{1，2，..，N-1，N}，120_{1，2，..，N-1，N}，130_{1，2，..，N-1，N}Of the basic coil 111_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}；

A second type of conductor 114, which will couple 110_{1，2，...，N-1}，120_{1，2，...，N-1}，130_{1，2，..，N-1}Second basic coil 112 of (1)_{1，2，...，N-1}，122_{1，2，..，N-1}，132_{1，2，..，N-1}The pair 110 immediately following along the magnetic inductor body 101_{2，..，N-1，N}，120_{2，..，N-1，N}，130_{2，..，N-1，N}First basic coil 111 in (1)_{2，..，N-1，N}，121_{2，..，N-1，N}，130_{2，..，N-1，N}Connecting;

a third type of conductor 115, which connects the last pair 110_N、120_N、130_NSecond basic coil 112 in_N、122_N、132_NConnected to the outputs of the phases P1, P2, P3.

It should be noted that, according to a possibility not shown and only in the case of an external inductor (which does not have the same spatial constraints as the internal inductor), an arrangement of basic coils is also known in which the basic coils of the same pair are coupled in series converging and have opposite winding directions. Apart from the fact that this coupling has a larger space requirement than the coupling described above, this possibility also has the same disadvantages as the coupling of the basic coils described above, which are referred to as "indirect series" coupling.

FIG. 3 shows a basic coil 111 coupled by what is known as a "pair of coils_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}Is coupled. In this coupling, for each phase P1, P2, P3:

basic coil 111_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}Have the same winding direction;

identical pairs 110_{1，2，..，N-1，N}，120_{1，2，..，N-1，N}，130_{1，2，..，N-1，N}First and second basic coils 111_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}Parallel connection;

for each of the first to N-1 th pairs, the basic coil 111_{1，2，..，N-1}，112_{1，2，..，N-1}，121_{1，2，..，N-1}，122_{1，2，..，N-1}，131_{1，2，..，N-1}，132_{1，2，..，N-1}Is connected to the basic coil 111 in a pair following it along the central axis 301_{2，...，N-1，N}，112_{2，..，N-1，N}，121_{2，...，N-1，N}，122_{2，...，N-1，N}，131_{2，.，N-1，N}，132_{2，..，N-1，N}One end of the same type of (1);

for the second to Nth pairs 110_{2，...，N-1，N}，120_{2，...，N-1，N}，130_{2，..，N-1，N}Of each pair, the basic coil 111_{2，..，N-1，N}，112_{2，..，N-1，N}，121_{2，..，N-1，N}，122_{2，..，N-1，N}，131_{2，..，N-1，N}，132_{2，...，N-1，N}Is connected to a pair 110 preceding it along the central axis 301_{1，2，..，N-1}，120_{1，2，..，N-1}，130_{1，2，..，N-1}The basic coil 111 in_{1，2，..，N-1}，112_{1，2，..，N-1}，121_{1，2，..，N-1}，122_{1，2，..，N-1}，131_{1，2，..，N-1}，132_{1，2，..，N-1}Of the same type of end.

Thus, for the second through N-1 pairs 110_{2，...，N-1}，120_2，..，N-1，130_2，..，N-1A basic coil 111 of a pair_2，..，N-1，112_2，..，N-1，121_2，..，N-1，122_2，..，N-1，131_2，..，N-1，132_2，..，N-1Is connected to the pair 110 following it along the central axis 301_..，N-1，N，120_..，N-1，N，130_..，N-1，NThe basic coil 111 in_..，N-1，N，112_..，N-1，N，121_..，N-1，N，121_..，N-1，N，131_..，N-1，N，132_..，N-1，NAnd the other of the two ends I, O is connected to the pair 110 before it along the central axis 301_1，2，..，120_1，2，..，130_1，2，..The basic coil 111 in_1，2，..，112_1，2，..，121_1，2，..，122_1，2，..，131_1，2，..，132_1，2，..Of the same type of end.

In this configuration, the basic coils 111 of the same phases P1, P2, P3_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}The link between is obtained by two types of conductors 116, 117:

a first type of conductor 116, which connects two subsequent pairs 110_{1，2，..，N-1，N}，120_{1，2，..，N-1，N}，130_{1，2，..，N-1，N}Of the basic coil 111_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}Are connected together.

A second type of conductor 117, which connects the last pair 110_N、120_N、130_NSecond basic coil 112_N、122_N、132_NConnected to the outputs of the phases P1, P2, P3.

These two coupling types thus allow the simulation of basic coils arranged in pairs by means of a three-phase current source111_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}The six-phase power supply of (1). However, they have a number of disadvantages.

In fact, an "indirect series" coupling requires alternating elementary coils 111_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}The winding direction, and therefore the risk of reversal in the winding direction during installation of the magnetic inductor 100 is very noticeable. In addition, magnetic inductors with this type of coupling are particularly sensitive to the effects of thermal expansion of the base coil, which expansion is difficult to adjust practically for the dimensioning of the first type conductor 104.

By coupling "paired coils", identical pairs 110_{1，2，..，N-1，N}，120_{1，2，..，N-1，N}，130_{1，2，..，N-1，N}Of the basic coil 111_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}Are connected in parallel. Thus, the two pairs 110 that will follow_{1，2，..，N-1，N}，120_{1，2，..，N-1，N}，130_{1，2，..，N-1，N}The first type conductors 116 connected to each other must have connectors dimensioned to allow connection to the respective constituent pairs 110_{1，2，..，N-1，N}，120_{1，2，..，N-1，N}，130_{1，2，..，N-1，N}Two basic coils 111_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}. However, such dimensioning of the connector is hardly suitable for withstanding the forces of thermal expansion.

Therefore, despite the coupling used for the paired basic coils, the magnetic inductor has low resistance to thermal expansion of the basic coils, and is therefore incompatible with high power. It should be noted that this is especially true for internal magnetic inductors having a small heat exchange surface, the outer surface of which is covered with an internal protection tube.

Disclosure of Invention

The invention aims to overcome this problem and therefore aims to provide a magnetic inductor with better resistance to thermal expansion of the base coil.

To this end, the invention relates to a magnetic inductor for an electromagnetic pump, intended to be powered by a multiphase current comprising a plurality of phases,

this magnetic inductor includes:

-a magnetic inductor body extending in a longitudinal direction;

-for each of the phases of the polyphase current, N pairs of elementary coils, having the same winding direction, one after the other along the body of the magnetic inductor from a first to an Nth pair, N being an integer greater than or equal to 2, each pair comprising a first elementary coil and a second elementary coil, one after the other along the body of the inductor, each elementary coil comprising two ends, one of which is an input-type end and the other of which is an output-type end,

wherein pairs of elementary coils are distributed along the inductor body so as to provide phase alternation and to provide a magnetic field sliding along the inductor body,

wherein pairs of elementary coils are distributed along the inductor body so as to provide phase alternation and to provide a magnetic field sliding along the inductor body.

For each of the phases:

the first and second basic coils of the first pair are intended to be connected to one of the current input and current output of the phase and to the other of the current input and current output of the phase, respectively;

-for each of the first to N-1 th pairs, one end of the first basic coil is connected to one end of the same type of the first coil immediately following along the inductor body;

-for each of the second to nth pairs, one end of the second basic coil is connected to one end of the same type of second basic coil located immediately before it along the magnetic inductor body; and

-for the nth pair, the first and second base coils are connected in series.

In such a magnetic inductor, the connection between the basic coils of the same phase is made between two consecutive pairs of coils of the same type, the first and second coils of the same pair being unconnected to each other except for the last pair. The conductor used to connect the elementary coils is therefore dimensioned to be equal to the distance between two consecutive pairs, this distance being sufficient to absorb the thermal expansion of the elementary coils.

Furthermore, since this coupling is not based on parallel coupling of the same pair of elementary coils, a single elementary coil is coupled at each end of a given conductor. Thus, the connector allowing the connection is hardly sensitive to the thermal expansion of the basic coil. Such a magnetic inductor therefore has a particularly optimized resistance to thermal expansion of the base coil.

In addition, by this coupling, each of the basic coils is coupled to the basic coil of the former pair and the basic coil of the latter pair. Thus, in case the coupled conductors are allowed to be distributed outside the inductor body, these conductors allow to increase the mechanical strength of the inductor body.

The magnetic inductor body may comprise a delimiting surface intended to face the passage of the electromagnetic pump,

the magnetic inductor body comprises on its delimiting surface a plurality of transverse grooves, which follow one another along the magnetic inductor body and in which the basic coils are accommodated.

In this way, the basic coil will be as close as possible to the pump channel and the pumping is optimized.

Each elementary coil connected to another elementary coil is connected by a respective electrical conductor extending along the delimiting surface.

In this way, when the inductor is an internal inductor, the conductors do not have to be housed inside the inductor body, and they participate completely in the mechanical cohesion (cohesion) of the inductor.

The magnetic inductor body may further comprise a longitudinal groove on a surface thereof, the electrical conductor being received in the longitudinal groove.

By means of such a recess, the compactness of the inductor is improved.

The magnetic inductor body may comprise a plurality of magnetic plates extending along a main axis and having a cross-section in the shape of an involute of a circle, the magnetic plates being interlocked with a circle of involutes of its circle, the circles of involutes of the circle merging in the shape of a tube extending longitudinally along the main axis, the tube forming the magnetic inductor body.

With such a magnetic plate in the involute shape of a circle, it is possible to form the entire inductor body using only one type of plate. Therefore, it is not necessary to provide a plurality of sensing plate shapes as in the prior art. The mounting method is also greatly facilitated because the plates are interchangeable.

The magnetic inductor may be an internal magnetic inductor intended to define an inner wall of the channel of the electromagnetic pump with a protective tube.

Such a magnetic inductor benefits in particular from the advantages related to the invention and in particular from the possibilities provided by the invention with regard to compactness and the possibility of being able to place a conductor along a delimited surface.

The magnetic inductor may be an external magnetic inductor intended to define an outer wall of the channel of the electromagnetic pump with a protective tube.

The invention also relates to an electromagnetic pump comprising at least one first magnetic inductor according to the invention.

The invention also relates to an electromagnetic pump comprising at least one second magnetic inductor according to the invention.

The electromagnetic pump may further comprise first and second inductors according to the invention.

Such an electromagnetic pump equipped with an inductor according to the invention benefits from the advantages associated with the inductor according to the invention.

The invention also relates to a method for manufacturing a magnetic inductor for an electromagnetic pump intended to be powered by a multiphase current comprising several phases, characterized in that it comprises the following steps:

-providing a magnetic inductor body,

-for each of the phases of the polyphase current, providing and connecting N pairs of elementary coils, having the same winding direction, successive to each other along the inductor body from a first to an nth pair, N being an integer greater than or equal to 2, each pair comprising a first elementary coil and a second elementary coil successive to each other along the inductor body, each elementary coil comprising two ends, one of which is an input-type end and the other of which is an output-type end, for each of the phases:

the first and second basic coils of the first pair are intended to be connected to one of the current input and current output of the phase and the other of the current input and current output of the phase, respectively;

for each of the first to N-1 th pairs, one end of the first base coil is connected to one end of the same type of first base coil immediately following along the inductor body;

for each of the second to nth pairs, one end of the second base coil is connected to one end of the same type of second base coil located immediately before it along the magnetic inductor body; and

for the nth pair, the first and second base coils are connected in series.

Such an approach allows to provide an inductor according to the invention and thus to benefit from the advantages associated therewith.

The magnetic inductor body may comprise a plurality of magnetic plates extending along a main axis and having a cross-section in the shape of an involute of a circle, said step of providing the magnetic inductor body comprising the sub-steps of:

-providing a plurality of identical magnetic slabs, each magnetic slab extending along a main axis and having a cross section in the shape of an involute of a circle;

-assembling a plurality of magnetic plates by interlocking to form a magnetic inductor body, merging together the circles of involutes of the circles of the magnetic plates.

This method allows to easily provide an inductor according to the invention, since only one type of magnetic plate needs to be used.

In the above and the rest of the text, "identical magnetic plates" means that the magnetic plates have the same shape within the given tolerance range.

The step of providing a magnetic inductor body may further comprise the sub-steps of:

cutting transversal grooves 102 in the longitudinal surfaces of the inner and outer longitudinal surfaces of the tubular body to form accommodations for elementary coils,

the providing and connecting step includes the sub-steps of:

-providing a basic coil of wire,

-placing the basic coil in a transverse groove formed during the cutting step.

By this cutting, it is easy to provide a housing for the coil. Therefore, the manufacturing method of the present invention is easier compared to the prior art method in which the magnetic plate must have a pre-cut.

Drawings

The invention will be better understood after reading the description of an exemplary embodiment given purely by way of indication and not of limitation with reference to the accompanying drawings, in which:

figures 1A and 1B are respectively a diagram showing different parts of an electromagnetic pump comprising an internal magnetic inductor and an external magnetic inductor and a diagram showing a paired power supply with basic coils of three-phase current,

figure 2 schematically shows the coupling in pairs of elementary coils of the "direct series" type of magnetic inductor supplied by three phases,

figure 3 schematically shows the coupling in pairs of elementary coils of the "coil pair" type of a magnetic inductor supplied by three phases,

figures 4A, 4B and 4C show respectively a perspective view of the winding circuit of the magnetic inductor according to the invention, a schematic view of the pair-wise coupling of the basic coils according to the invention and a perspective view of the internal magnetic inductor according to the invention,

figures 5A and 5B show a schematic cross-section and a perspective view of a basic coil respectively, equipped with the magnetic inductor shown in figure 4C,

fig. 6 shows a cross-sectional view of an internal magnetic inductor according to a second embodiment of the invention, wherein the magnetic inductor comprises an inductor body in the shape of an involute of a circle.

The same, similar or equivalent parts of different figures have the same reference numerals in order to facilitate the transition from one figure to another.

The various parts shown in the figures are not necessarily shown in uniform scale in order to make the figures more legible.

Detailed Description

Fig. 1A, which has been described in connection with the prior art, shows an electromagnetic pump comprising two magnetic inductors 100, 200, one being an internal magnetic inductor and the other being an external magnetic inductor.

Therefore, such a solenoid pump 1 comprises, starting from the central axis 301 of the solenoid pump 1:

an internal magnetic inductor 100 comprising a plurality of first elementary coils 111;

-an inner protective tube 310;

-a channel 320;

-an outer protective tube 330;

an external magnetic inductor 200 comprising a plurality of second elementary coils 211.

Each magnetic inductor 100, 200 comprises:

-a magnetic inductor body 101, 201;

a plurality of elementary coils 111, 211;

conductors, not shown in fig. 1A, which allow to connect the elementary coils together and to connect them to the first, second and third phases, not shown in fig. 1A.

For each of the magnetic inductors 100, 200, the magnetic inductor body 101, 201 has a tubular shape centered on a central axis 301 of said magnetic inductor 100, 200. The magnetic inductor body 101 comprises a plurality of lateral grooves 102, 202, which lateral grooves 102, 202 follow each other along the inductor body, each of the lateral grooves 102, 202 accommodating a corresponding basic coil 111, 211. The inductor body 101, 202 comprises a plurality of not shown radial magnetic plates assembled together.

In the context of the present invention, the electromagnetic pump 1 comprises at least one magnetic inductor 100, 200, preferably both, of an internal magnetic inductor 100 and an external magnetic inductor 200, with a coupling of the basic coils 111, 211 according to the present invention. Such a coupling according to the invention is particularly advantageous for an internal magnetic inductor 100 according to the invention, in particular because it provides the possibility of making a connection between the basic coils 111 on the outer surface of the magnetic inductor body 101 (rather than inside the magnetic inductor body 101 as in the prior art). Therefore, only the coupling of internal magnetic inductors 100 will be described in detail. Of course, on the basis of this document, the person skilled in the art is fully capable of applying the teachings described for the internal magnetic inductor 100 to the external magnetic inductor 200 without exhibiting any inventive step.

Such a coupling is shown in fig. 4A and schematically in fig. 4B.

Thus, as can be seen in fig. 4A and 4B, for each of the phases P1, P2, P3 of the multi-phase current, the magnetic inductor 100 includes N pairs 110_{1，2，...，N-1，N}，120_{1，2，..，N-1，N}，130_{1，2，..，N-1，N}Of the basic coil 111_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}Having the same winding direction, along the magnetic inductor body 101 from the first pair 110₁、120₁、130₁To the Nth pair 110_N、120_N、130_NOne pair after the other, N is an integer greater than or equal to 2. Each pair 110_{1，2，..，N-1，N}，120_{1，2，..，N-1，N}，130_{1，2，..，N-1，N}Comprising a first and a second basic coil 111, which follow one another along the magnetic inductor body 101_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}. Each basic coil 111_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}Including two terminals I, O, i.e., an input type terminal I and an output type terminal O.

Of course, the distinction between input I and output O is purely set by man, depending on the operating principle of the coil. In fact, the replacement of one by another is equivalent to a simple reversal of the winding direction of the coil. Therefore, in the above-mentioned specification, all basic coils 111 of the magnetic inductor 100 are covered_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}To the same extent, the connections described above are valid regardless of the choice between input I and output O.

Basic coil 111_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}Pair 110 of_{1，2，..，N-1，N}，120_{1，2，..，N-1，N}，130_{1，2，..，N-1，N}Distributed along the magnetic inductor body 101 so as to provide phase alternations P1, P2, P3 and provide a magnetic field that slides along the magnetic inductor body 101.

The basic coil 111 associated with the same phase of the first phase P1, the second phase P2 and the third phase P3 is described below_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}To be connected to each other.

Thus, for feedingFixed phases P1, P2, P3, a first pair 110₁、120₁、130₁First and second basic coils 111₁、112₁、121₁、122₁、131₁、132₁Connected to one of the current input and current output of the phases P1, P2, P3 and the other of the current input and current output of the phases P1, P2, P3, respectively. Therefore, as shown in fig. 4B, for the first phase P1 and the third phase P3, the first basic coil 111₁、131₁Is connected to the current input of said phases P1, P3, and the second basic coil 112₁、132₁Is connected to the current output of the phase P1, P3. For a second phase P2, the first basic coil 121₁Is connected to the current output of said phase P2, and the second basic coil 122₁Is connected to the current input of the phase P2.

For this same given phase P1, P2, P3, and for the first through N-1 pairs 110 associated with said phase P1, P2, P3_{1，2，..，N-1}，120_{1，2，..，N-1}，130_{1，2，..，N-1}Of each pair, the first basic coil 111_{1，2，..，N-1}，121_{1，2，..，N-1}，131_{1，2，..，N-1}I, O is connected to the first basic coil 111 immediately following along the magnetic inductor body 101_{1，2，..，N-1}，121_{1，2，..，N-1}，131_1，2，N-1Of the same type. Similarly, for the second through Nth pairs 110 associated with the phases P1, P2, P3_{2，..，N-1，N}，120_{2，..，N-1，N}，130_{2，..，N-1，N}Of each pair, the second basic coil 112_{2，..，N-1，N}，122_{2，..，N-1，N}，132_{2，..，N-1，N}One of the ends I, O is connected to the second basic coil 112 located immediately before along the magnetic inductor body 101_{2，..，N-1，N}，122_{2，..，N-1，N}，132_{2，..，N-1，N}Of the same type of end.

Thus, as shown in FIG. 4B, forHaving phases P1, P2, P3, a first pair 110₁、120₁、130₁First basic coil 111, 121₁、131₁Is connected to the second pair 110₂、120₂、130₂Of the basic coil 111₂、121₂、131₂The output O of (a). Second pair 111₂、121₂、131₂Of the same first basic coil 111₂、121₂、131₂Is in turn connected to the input I (without reference numeral) of the first basic coil of the third pair. For these same phases P1, P2, P3, the last pair 110_N、120_N、130_NSecond basic coil 112_N、122_N、132_NIs connected to the penultimate pair 110_N-1、120_N-1、130_N-1Second basic coil 112 in_N-1、122_N-1、132_N-1Input I of (2). The same second basic coil 112 of the phases P1, P2, P3_N-1、122_N-1、132_N-1Is connected to the output O (no reference numeral) of the second coil in the N-2 th pair (no reference numeral).

For each of the first through third phases P1, P2, P3, the Nth pair 110_N、120_N、130_NFirst and second basic coils 111_N、112_N、121_N、122_N、131_N、132_NAre connected in series. Thus, the last pair 110_N、120_N、130_NFirst basic coil 111_N、121_N、131_NIs connected to the same last pair 110_N、120_N、130_NSecond basic coil 112_N、122_N、132_NThe output O of (a).

By this coupling, as shown in fig. 4C, the basic coil 111_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}The link between is provided by a first type of conductor 118 and a second type of conductor 119.

The first type of conductor 118 allows the connection of two consecutive pairs of elementary coils, for example, the first and second pairs 110₁、110₂、120₁、120₂、130_A、130₂First basic coil 111 in (1)₁、111₂、121₁、121₂、131₁、131₂To output of (c). As shown in fig. 4B, the first type conductor 118 may be in the form of a straight conductive rod. The first type conductors 118 corresponding to two pairs 110 successive to each other_{1，2，..，N-1，N}，120_{1，2，..，N-1，N}，130_{1，2，..，N-1，N}Two basic coils 111_{1，2，...，N-1，N}，112_{1，2，...，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1、2，..，N-1，N}The length of the distance therebetween. Such a length of the first type conductor 118 allows to obtain a couple to the basic coil 111_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}Because the deformations associated with such thermal expansion are distributed over the entire length of the conductor 118.

The second type of conductor 119 allows to connect the last pair 110 in series_N、120_N、130_NFirst and second basic coils 111_N、112_N、121_N、122_N、131_N、132_N. In order to provide good resistance to thermal expansion of the base coil, as shown in fig. 4A, 4C, the second type of conductor 119 has:

a U-shape, the two branches of which extend parallel to the central axis 101 and the base of which extends in the shape of a circular arc centred on the central axis 101 of the inductor body and having a diameter greater than the outer diameter of the inductor body, for the conductor 119 corresponding to the second phase P2 and the third phase P3;

or M-shaped, the four branches of which are parallel to the central axis 101 and are connected in pairs by respective segments which extend on an arc of a circle centred on the central axis 101 of the inductor body and which have a diameter greater than the outer diameter of the inductor body, for the conductor 119 corresponding to the first phase P1. Therefore, with such U-shape and M-shape, the second type conductors 119 can extend along the outer periphery of the magnetic inductor main body 101 without interfering with each other.

FIG. 4C shows the basic coil 111_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}And the arrangement of conductors 118, 119 connecting them along the magnetic inductor body 101. Thus, it can be seen in this figure that the basic coil 111_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}Each of which is disposed in a lateral groove 102 corresponding to the magnetic inductor body 101.

In particular, fig. 6A is an enlarged cross-sectional schematic view showing the mounting of the basic coil 111 provided in the lateral groove 102 of the magnetic inductor body 101. In this figure, it can be seen that the basic coil 111 is made up of 10 turns S, distributed over 5 turns S in two columns. The turns of the first column are connected to the turns S of the second column by respective innermost turns D (i.e. the turns closest to the central axis 301 of the magnetic inductor body 101). In order to insulate the turns S from each other, a dielectric body is provided which coats the electrically conductive material constituting each of the turns S. An additional dielectric layer may also be provided on the walls of the lateral recess 102 to electrically insulate the basic coil 111 from the magnetic inductor body 101. The two outer turns S of the basic coil 111 (i.e., the one farthest from the central axis 301 of the magnetic inductor body 101) include an input I and an output O, which are artificially placed on the same plane so that they both appear.

In fig. 6B it can be seen that the input I and the output O of each of the elementary coils are arranged at an angle α of 100 with respect to each other, of course such an angle is given as an example and other α are fully possible without departing from the scope of the invention, in particular the angle α between the input I and the output O may be less than 90 deg. and preferably between 50 deg. and 70 deg., this same angle α advantageously being substantially equal to 60 deg..

As shown in fig. 4A and 4C, except that each nth pair 110_N、120_N、130_N111 of (a)_N、112_N、121_N、122_N、131_N、132_NExcept that the same pair 110_{1，2，..，N-1}，120_{1，2，..，N-1}，130_{1，2，..，N-1}Two basic coils 111 in_{1，2，..，N-1}，112_{1，2，..，N-1}，121_{1，2，..，N-1}，122_{1，2，..，N-1}，131_{1，2，..，N-1}，132_{1，2，..，N-1}Are offset from each other by an angle substantially equal to 20 deg.. In the same way:

basic coil 121 of second phase P2_{1，2，...，N-1}，122_{1，2，..，N-1}And a basic coil 111 of a first phase P1_{1，2，..，N-1}，112_{1，2，..，N-1}Offset by an angle substantially equal to 20 °; and is

Basic coil 131 of third phase P3_{1，2，..，N-1}，132_{1，2，..，N-1}And a basic coil 121 of a second phase P2_{1，2，..，N-1}，122_{1，2，..，N-1}Offset by an angle substantially equal to 20 deg..

In this configuration, the first type of conductor 118 allows to connect two elementary coils 111 of two pairs successive to each other of the same phase, without the risk of interfering with the other conductor 118, whether it be of the corresponding phase or of the other phase.

With respect to the nth pair of base coils, the respective angles between the first and second base coils in each pair are as follows:

for the first phase P1, the nth pair110_NFirst basic coil 111_NAnd the second basic coil 112_NThe included angle between the two is 130 degrees;

for the second phase P2, the nth pair 120_NFirst basic coil 121_NAnd the second basic coil 122_NThe angle between is 80 °;

for the third phase P2, the nth pair 130_NFirst basic coil 131_NAnd the second basic coil 132_NThe angle therebetween is 150 °.

Of course, all these angles are given as examples and correspond to the shape of the second type conductor 119 as shown in the figures.

Magnetic inductor 100 according to the present invention may be formed during a manufacturing method comprising the steps of:

-providing a magnetic inductor body 101;

-providing and connecting N pairs 110 having the same winding direction for each of the phases P1, P2, P3 of the polyphase current_{1，2，..，N-1，N}，120_{1，2，..，N-1，N}，130_{1，2，..，N-1，N}Of the basic coil 111_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}Said basic coil follows the magnetic inductor body 101 from a first pair 110₁、120₁、130₁To the Nth pair 110_N、120_N、130_NOne after the other, N being an integer greater than or equal to 2, each pair 110_{1，2，..，N-1，N}，120_{1，2，..，N-1，N}，130_{1，2，..，N-1，N}Comprising first elementary coils 111 that are successive to one another along the magnetic inductor body 101_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}And a second basic coil 112_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，132_{1，2，...，N-1，N}Each of the basic coils 111_{1，2，...，N-1，N}，121_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}Comprising two terminals I, O, one of which is an input-type terminal I and the other of which is an output-type terminal O, for each of the phases P1, P2, P3:

first pair 110₁、120₁、130₁First basic coil 111 in (1)₁、121₁、131₁And a second basic coil 112₁、122₁、132₁One of the current inputs and current outputs intended to be connected to the phases P1, P2, P3 and the other one of the current inputs and current outputs to the phases P1, P2, P3, respectively;

for the first to N-1 pairs 110_{1，2，..，N-1}，120_{1，2，..，N-1}，130_{1，2，..，N-1}Of each pair, the first basic coil 111_{1，2，..，N-1}，121_{1，2，..，N-1}，131_{1，2，..，N-1}I, O is connected to the first basic coil 111 immediately following along the magnetic inductor body 101_{1，2，..，N-1}，121_{1，2，..，N-1}，131_{1，2，..，N-1}Of the same type of end.

For the second to Nth pairs 110_{2，..，N-1，N}，120_{2，..，N-1，N}，130_{2，..，N-1，N}Of each pair, the second basic coil 112_{2，..，N-1，N}，122_{2，..，N-1，N}，132_{2，..，N-1，N}One of the ends I, O is connected to the second basic coil 112 located immediately before along the magnetic inductor body 101_{2，..，N-1，N}，122_{2，..，N-1，N}，132_{2，..，N-1，N}One end of the same type of (1); and is

For the Nth pair 110_N、120_N、130_NFirst basic coil 111_N、121_N、131_NAnd a second basic coil 112_N、122_N、132_NAre connected in series.

Fig. 6 shows a cross-sectional view of a magnetic inductor 100 according to a second embodiment of the present invention, wherein the magnetic inductor body 101 comprises a magnetic plate 103 called "involute of circle" magnetic plate. Such a magnetic plate 103 extends along the main axis (the central axis 301 of the magnetic inductor main body 101) and has a cross section in the shape of an involute of a circle.

The magnetic inductor body 101 including such a magnetic plate 103 "in the shape of an involute of a circle" can be formed by a manufacturing method including the steps of:

providing a plurality of identical magnetic plates 103, each of the magnetic plates 130 extending along a main axis 301 and having a cross section in the shape of an involute of a circle,

adding a non-stick and dielectric coating on the plurality of magnetic plates 103 to facilitate interlocking and allow,

assembling a plurality of magnetic plates 103 by interlocking to form an axial tubular body, the circles of involutes of the circles of the magnetic plates 103 merging together,

cutting transversal grooves 102 in the longitudinal surfaces of the internal and external longitudinal surfaces of the tubular body, so as to form a longitudinal groove for the elementary coils 111_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}The accommodating portion of (a);

providing a base coil 111_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}，

The basic coil 111_{1，2，..，N-1，N}，112_{1，2，..，N-1，N}，121_{1，2，..，N-1，N}，122_{1，2，..，N-1，N}，131_{1，2，..，N-1，N}，132_{1，2，..，N-1，N}Is placed in the lateral groove 102 formed during the cutting step, thereby forming the magnetic inductor 101.

It may be noted that in a general embodiment of the invention, the step of providing and placing the elementary coils is concomitant, since the providing step consists in assembling the elementary coils directly into the corresponding transversal grooves.

Of course, if in both embodiments described above, for connecting the basic coils 111_{，2，..，N-1，N}，112_{，2，..，N-1，N}，121_{，2，..，N-1，N}，122_{，2，..，N-1，N}，131_{，2，..，N-1，N}，132_{，2，..，N-1，N}Are distributed along the magnetic inductor body carried on the outer surface, other configurations are possible without departing from the scope of the invention.

Thus, for example, it is entirely possible that the magnetic inductor body is provided with a longitudinal groove to accommodate the conductor, or that the conductor is accommodated inside the magnetic inductor body.