阅读说明：本技术 一种无槽式轴向磁通永磁旋转变压器 (Non-groove type axial flux permanent magnet rotary transformer ) 是由 孙乐 程明 罗哲君 李霄翔 于 2019-11-14 设计创作，主要内容包括：本发明公开了一种无槽式轴向磁通永磁旋转变压器,包括定子与转子,所述转子正对定子设置,且定子与转子之间有气隙,所述定子包括定子铁心、磁极、表贴磁钢与PCB,所述磁极等间距设置在定子铁心的一面,所述表贴磁钢等间距设置在定子铁心的另一面,且位于两个磁极之间,所述PCB贴合在定子铁心表面,所述PCB与定子铁心正对的一面设置有绕组。本发明为轴向磁通式,构造简单,效率高,轴向尺寸短、径向尺寸大、功率密度大、散热性好。(The invention discloses a slotless axial flux permanent magnet rotary transformer which comprises a stator and a rotor, wherein the rotor is arranged opposite to the stator, an air gap is formed between the stator and the rotor, the stator comprises a stator core, magnetic poles, surface-mounted magnetic steel and a PCB (printed circuit board), the magnetic poles are arranged on one surface of the stator core at equal intervals, the surface-mounted magnetic steel is arranged on the other surface of the stator core at equal intervals and is positioned between the two magnetic poles, the PCB is attached to the surface of the stator core, and a winding is arranged on one surface of the PCB opposite to the stator core. The invention is of axial magnetic flux type, simple structure, high efficiency, short axial size, large radial size, large power density and good heat dissipation.)

1. The utility model provides a no slot type axial magnetic flux permanent magnetism resolver, its characterized in that, includes stator (1) and rotor (2), rotor (2) just sets up to the stator, and has air gap (3) between stator (1) and rotor (2), stator (1) includes stator core (11), magnetic pole (12), table pastes magnet steel (13) and PCB (14), magnetic pole (12) equidistant setting is in the one side of stator core (11), table pastes magnet steel (13) equidistant setting in the another side of stator core (11), and is located between two magnetic poles (12), PCB (14) laminating is on stator core (11) surface, PCB (14) and stator core just right one side are equipped with winding (15).

2. The slotless axial flux permanent magnet rotary transformer according to claim 1, characterized in that the air gap (3) width is within 1 mm.

3. The permanent-magnet rotary transformer with no slot type axial flux as claimed in claim 1, wherein k windings (15) are correspondingly arranged between two adjacent magnetic poles (12), and k is larger than 2.

4. The slotless axial flux permanent magnet resolver according to claim 1, wherein the outer side of the rotor (2) is provided with a number of rotor salient poles (22) which is even.

5. The permanent magnet rotary transformer with no slot type axial flux as claimed in claim 4, wherein the number of the magnetic poles (12) and the surface-mounted magnetic steels (13) is equal to the number of the salient poles (22) of the rotor.

6. The slotless axial flux permanent magnet rotary transformer of claim 1, wherein the stator core (11) is laminated of silicon steel sheets.

7. The slotless axial flux permanent magnet rotary transformer of claim 1, wherein the windings (15) comprise sine feedback windings and cosine feedback windings, the sine feedback windings and the cosine feedback windings being alternately disposed on the PCB (14) at equal intervals.

8. The slotless axial flux permanent magnet rotary transformer of claim 7, wherein the number of the sine feedback windings and the cosine feedback windings is 2 k.

Technical Field

The invention belongs to the technology of a flux permanent magnet motor, and particularly relates to a slotless axial flux permanent magnet rotary transformer.

Background

The position feedback measurement driven by the motor is commonly used by an encoder or a rotary transformer, and the rotary transformer is more widely applied than the encoder in a high-speed occasion. The rotary transformer has a radial type and an axial type, and the radial type structure is complex and is not easy to radiate; the axial structure is simple, the efficiency is high, and the heat dissipation is good. The rotary transformer adopts a slotless structure, so that the temperature rise and the noise under high-speed operation are reduced. Meanwhile, the winding is drawn by adopting the PCB, so that the automation degree is improved, the error rate is reduced, and the maintenance is convenient.

Disclosure of Invention

The invention aims to provide a slotless axial flux permanent magnet rotary transformer.

The technical solution for realizing the purpose of the invention is as follows: the utility model provides a no slot type axial magnetic flux permanent magnetism resolver, includes stator and rotor, the rotor is just to the stator setting, and has the air gap between stator and the rotor, the stator includes stator core, magnetic pole, table subsides magnet steel and PCB, the equidistant setting of magnetic pole is in the one side of stator core, the equidistant setting of table subsides magnet steel is in stator core's another side, and is located between two magnetic poles, the PCB laminating is on stator core surface, PCB is multilayer composite construction, and every layer all is equipped with the winding.

Preferably, the air gap width is within 1 mm.

Preferably, k windings are correspondingly arranged between two adjacent magnetic poles, and k is greater than 2.

Preferably, the outer side surface of the rotor is provided with a plurality of rotor salient poles, and the number of the salient poles is even.

Preferably, the number of the magnetic poles and the magnetic steels is equal to that of the salient poles of the rotor.

Preferably, the stator core is formed by laminating silicon steel sheets.

Preferably, the windings comprise sine feedback windings and cosine feedback windings, and the sine feedback windings and the cosine feedback windings are alternately arranged on the PCB at equal intervals.

Preferably, the number of the sine feedback windings and the number of the cosine feedback windings are both 2 k.

Compared with the prior art, the invention has the following remarkable advantages: the invention is of an axial magnetic flux type, and has simple structure, high efficiency, short axial size, large radial size, high power density and good heat dissipation; the design of the slotless structure effectively reduces the temperature rise, noise and vibration of the motor during high-speed operation; the PCB is adopted, so that the error of manual wiring is avoided, the automatic assembly, mounting, soldering and detection of electronic components are realized, the cost is reduced, and the maintenance is convenient; the surface-mounted magnetic steel is arranged to enable the sine degree of the back electromotive force curve to be higher.

The present invention is described in further detail below with reference to the attached drawings.

Drawings

FIG. 1 is a schematic diagram of an axial flux permanent magnet rotary transformer of the present invention.

Fig. 2 is an exploded schematic view of an axial flux permanent magnet rotary transformer of the present invention.

Fig. 3 is a schematic diagram of a PCB portion of an axial flux permanent magnet resolver of the invention.

Fig. 4 is a schematic diagram of the operating principle of the axial flux permanent magnet resolver of the present invention.

Fig. 5 is the output signal of the preferred embodiment of the present invention at high speed.

Detailed Description

As shown in fig. 1-3, a slotless axial magnetic flux permanent magnet rotary transformer, includes stator 1 and rotor 2, rotor 2 is just to the stator setting, and has air gap 3 between stator 1 and the rotor 2, stator 1 includes stator core 11, magnetic pole 12, table pastes magnet steel 13 and PCB14, magnetic pole 12 equidistant setting is in the one side of stator core 11, table pastes magnet steel 13 equidistant setting in the another side of stator core 11, and is located between two magnetic poles 12, PCB14 sets up the one side that is equipped with magnetic pole 12 at stator core 11, PCB14 is provided with winding 15 with the just right one side of stator core.

In a further embodiment, the air gap 3 is within 1mm wide.

In a further embodiment, k windings 15 are correspondingly arranged between two adjacent magnetic poles 12, and k is greater than 2. In some embodiments, 4 windings (15) are correspondingly arranged between two adjacent magnetic poles (12).

In a further embodiment, the outer side surface of the rotor 2 is provided with a plurality of rotor salient poles 22, and the number of the salient poles is even.

In a further embodiment, the number of the magnetic poles 12 and the magnetic steels 13 is equal to the number of the rotor salient poles 22. In a specific implementation, the stator core 11 may be designed as a whole, in which an even number of magnetic poles 12 are embedded, with alternating polarity; meanwhile, magnetic steels 13 with the same number as the magnetic poles are embedded, and the polarities are alternately arranged.

In a further embodiment, the stator core 11 is formed by laminating silicon steel sheets.

In a further embodiment, the windings 15 include sine feedback windings and cosine feedback windings, and the sine feedback windings and the cosine feedback windings are alternately arranged on the PCB14 at equal intervals.

In a further embodiment, the number of the sine feedback windings and the number of the cosine feedback windings are both 2 k. In some embodiments, the number of the sine feedback winding and the cosine feedback winding is 8.

As shown in fig. 4, it is a schematic diagram of the working principle of the sensor winding, and the winding includes two parts of circuits, namely a sine feedback winding and a cosine feedback winding. Along with the rotation of the rotor, the air gap magnetic field changes, and two paths of orthogonal voltage signals are respectively induced in the sine feedback winding and the cosine feedback winding. As shown in fig. 5, at high speed, no-load back electromotive force is induced in the sine feedback winding and the cosine feedback winding by the magnetic poles 12 and the magnetic steel 13 on the stator.

When the motor rotor runs at a high speed, the invention can directly induce sine and cosine feedback signals so as to provide position information and has the obvious advantages of small volume, light weight, convenient maintenance, economy, high efficiency and the like.

As other embodiments of the present invention, different from the above embodiments, the surface-mounted magnetic steel may be disposed on the same side or different sides of the magnetic pole, and such a change is within the technical idea of the present invention.

The preferred embodiments of the present invention have been described in detail, but the present invention is not limited to the details of the above embodiments, and various equivalent changes can be made to the technical solution of the present invention within the technical spirit of the present invention.