阅读说明：本技术 旋转电机 (Rotating electric machine ) 是由 浅野能成 近藤俊成 三箇义仁 小坂卓 于 2018-04-12 设计创作，主要内容包括：设有定子铁芯(21),在该定子铁芯(21)上形成有布置励磁绕组(23)的励磁槽(213a)和布置电枢绕组(24)的电枢槽(213b),并在励磁槽(213a)内布置永久磁铁(22)。电枢绕组(24)由第一绕组(24a)和第二绕组(24b、24c)构成,第一绕组(24a)在永久磁铁(22)上通过,第二绕组(24b、24c)具有进入到励磁绕组(23)的线圈端部(23a)与卷绕有该励磁绕组(23)的齿(211)之间的部分。(Equipped with stator core (21), it is formed with the excitation slot (213a) of arrangement excitation winding (23) on the stator core (21) and arranges the armature slot (213b) of armature winding (24), and arranges permanent magnet (22) in excitation slot (213a).Armature winding (24) is made of the first winding (24a) and the second winding (24b, 24c), first winding (24a) passes through on permanent magnet (22), and the second winding (24b, 24c) has the part between the tooth (211) for entering the end turn (23a) of excitation winding (23) and being wound with the excitation winding (23).)

1. a kind of rotating electric machine, it is characterised in that:

The rotating electric machine has excitation winding (23), armature winding (24), circular stator core (21), permanent magnet (22) and rotor core (11),

Direct current is supplied to the excitation winding (23),

Alternating current is supplied to the armature winding (24),

It is arranged respectively in the circumferential direction of the stator core (21) and is formed with multiple excitation slots (213a) and multiple armature slots (213b), the excitation slot (213a) are the slot (213) for arranging the excitation winding (23), and the armature slot (213b) is arrangement The slot (213) of the armature winding (24),

The permanent magnet (22) is accommodated in each excitation slot (213a),

The rotor core (11) is opposed with the stator core (21) with defined air gap (G)；

The armature winding (24) is made of the first winding (24a) and the second winding (24b, 24c), wherein first winding (24a) passes through on the permanent magnet (22), and second winding (24b, 24c), which has, enters the excitation winding (23) End turn (23a) and be wound with the excitation winding (23) tooth (211) between part.

2. rotating electric machine according to claim 1, it is characterised in that:

The excitation winding (23) is set to the inner circumferential side and this two sides of peripheral side of the permanent magnet (22),

The armature winding (24) has end turn (23a) corresponding second of the excitation winding (23) with inside and outside Winding (24b, 24c).

3. rotating electric machine according to claim 2, it is characterised in that:

Second winding (24b, 24c) is not outstanding from the excitation winding (23) radially.

4. according to claim 1 to rotating electric machine described in any one of 3 claims, it is characterised in that:

First winding (24a) and the second winding (24b, 24c) resistance having the same and identical the number of turns, and that This and tie.

5. according to claim 1 to rotating electric machine described in any one of 3 claims, it is characterised in that:

First winding (24a) and second winding (24b, 24c) are one another in series wiring.

6. according to claim 1 to rotating electric machine described in any one of 5 claims, it is characterised in that:

The excitation winding (23) and the armature winding (24) are the edgewise coil that is formed or flat by flat conductor bending Coiling.

Technical field

The present invention relates to a kind of rotating electric machines.

Background technique

In the motor as one of rotating electric machine, exist referred to as mixed excited magnetic pass switch motor (HEFSM: Hybrid Excitation Flux Switching Motor.Also simply be denoted as HEFSM sometimes below) this form it is electronic Machine.In HEFSM, both winding and permanent magnet are equipped on stator, and having makes the magnetic flux of permanent magnet from stator To the operation mode of rotor flow (referring for example to patent document 1).In the example of patent document 1, it is specified that winding (excitation around Group) it is arranged to contact with permanent magnet, by being controlled to the energized state that the excitation winding flows direct current, to control The flowing of the magnetic flux of permanent magnet processed, and alternating current is supplied to the winding (armature winding) for being used to form rotating excitation field to make to turn Son rotation.

Patent document 1: Japanese Laid-Open Patent Publication Laid-Open 2013-201869 bulletin

Summary of the invention

The technical problems to be solved by the invention-

However, since mixed excited magnetic pass switch motor has excitation winding and armature winding both windings, and it Assembled arrangement it is complicated, so end turn tends to get bigger, and occupation efficiency is according to circumstances different and become smaller.Especially exist In the case that all excitation winding is arranged in this two sides of the inner circumferential side and peripheral side of permanent magnet, the assembling of winding is more complicated, this is asked Topic becomes more significant.Therefore, in mixed excited magnetic pass switch motor, increase the conductor cross sectional area of the armature winding in slot simultaneously It is not easy.

The present invention is exactly conceived to the above problem and completes, its object is to: in mixed excited magnetic pass switch motor, The enlargement of end turn is avoided, while increasing the conductor cross sectional area of the armature winding in slot.

To solve the technical solution-of technical problem

In order to solve the above-mentioned technical problem, the invention of first aspect is related to a kind of rotating electric machine, it is characterised in that: the rotation Rotating motor has excitation winding 23, armature winding 24, circular stator core 21, permanent magnet 22 and rotor core 11, Direct current is supplied to the excitation winding 23, Xiang Suoshu armature winding 24 supplies alternating current, in the circumferential direction of the stator core 21 Upper arrange respectively is formed with multiple excitation slot 213a and multiple armature slot 213b, and the excitation slot 213a is to arrange the excitation The slot 213 of winding 23, the armature slot 213b are the slot 213 for arranging the armature winding 24, and the permanent magnet 22 is accommodated in In each excitation slot 213a, the rotor core 11 is opposed with the stator core 21 with defined air gap G；The armature winding 24 are made of the first winding 24a and second winding 24b, 24c, wherein the first winding 24a leads on the permanent magnet 22 It crosses, described second winding 24b, 24c have the end turn 23a for entering the excitation winding 23 and be wound with the excitation winding Part between 23 tooth 211.

Under this structure, in stator core 21, excitation winding 23 is to make coil by be overlapped with armature winding 24 What the mode for being increased to minimum of the axial length of end was crumpled up.

Also, the invention of second aspect is on the basis of the invention of first aspect, it is characterised in that: the excitation winding 23 Set on the inner circumferential side and this two sides of peripheral side of the permanent magnet 22, what the armature winding 24 had with inside and outside described is encouraged Corresponding second winding 24b, the 24c of the end turn 23a of magnetic winding 23.

Under this structure, it in the rotating electric machine 1 that the interior periphery two sides of permanent magnet 22 have excitation winding 23, encourages Magnetic winding 23 is by the quilt by way of the be overlapped increase minimum to make the axial length of end turn with armature winding 24 It winds up.

Also, the invention of the third aspect is on the basis of the invention of second aspect, it is characterised in that: second winding 24b, 24c be not outstanding from the excitation winding 23 radially.

Also, on the basis of the first invention of either side into the third aspect, feature exists for the invention of fourth aspect In: the first winding 24a and the second winding 24b, 24c resistance having the same and identical the number of turns, and each other simultaneously Tie.

Also, on the basis of the first invention of either side into the third aspect, feature exists for the invention of the 5th aspect It is one another in series wiring in: the first winding 24a and described second winding 24b, 24c.

Also, in the first to the 5th aspect on the basis of the invention of either side, feature exists for the invention of the 6th aspect In: the excitation winding 23 and the armature winding 24 be the edgewise coil formed or flat coiling by flat conductor bending Circle.

Under this structure, excitation winding 23 and armature winding 24 are formed with high dimensional accuracy.

The effect of invention-

According to the invention of first aspect, can be avoided the enlargement of end turn, at the same can increase the armature in slot around The conductor cross sectional area of group.

Also, according to the invention of second aspect, just has the electric rotating of excitation winding in the interior periphery two sides of permanent magnet For machine, the enlargement of end turn can be avoided, while the conductor cross sectional area of the armature winding in slot can be increased.

Also, according to the invention of the third aspect, the radial width of winding can be reduced.

Also, according to the invention of the 6th aspect, in rotating electric machine, the reduction of copper loss can be realized, occupation efficiency mentions It is high.

Detailed description of the invention

Fig. 1 is the cross-sectional view for showing the structure of the motor in first embodiment of the invention.

Fig. 2 is the figure from the axial stator core seen.

Fig. 3 shows the deployment scenarios from the axial excitation winding and armature winding seen.

Fig. 4 is the perspective view for the armature winding (around group) seen from inner circumferential side.

Fig. 5 is the perspective view for the armature winding seen from peripheral side.

Fig. 6 is to show the perspective view for constituting each edgewise coil around group (armature winding).

Fig. 7 is comparable to the sectional axonometric drawing of the stator of the VII-VII section of Fig. 3.

Fig. 8 is comparable to the sectional axonometric drawing of the stator of the VIII-VIII section of Fig. 3.

Fig. 9 is the perspective view for showing the armature winding in second embodiment.

Figure 10 is the perspective view for showing the armature winding in third embodiment.

Specific embodiment

Hereinafter, the embodiments of the present invention will be described with reference to the drawings.It should be noted that the following embodiments and the accompanying drawings is Substantially preferred example, there is no the intentions that the range to the present invention, its application or its purposes limits.

(first embodiment of invention)

Hereinafter, the example of motor is illustrated as an example of rotating electric machine of the invention.Fig. 1 is to show this hair The cross-sectional view of the structure of motor 1 in bright first embodiment.The motor 1 is an example of HEFSM.As shown in Figure 1, electric Motivation 1 has the rotor 10 and stator 20 opposite each other with defined air gap G, and is accommodated in shell (illustration omitted).It is electronic Machine 1 drives automobile such as the compressor that can be applied to automobile, air-conditioning device, and using the drive shaft 12 for being set to rotor 10 Speed changer, the compressor of air-conditioning device etc..

It should be noted that axially refer to the direction of the axle center P of drive shaft 12 in the term used in following explanation, Radial direction refers to the direction orthogonal with axle center P.Also, peripheral side refers to that the off-axis farther away side heart P, inner circumferential side refer to off-axis heart P Closer side.

< rotor >

Rotor 10 has rotor core 11 and drive shaft 12.Rotor core 11 is formed by soft-magnetic body.Present embodiment Rotor core 11 is laminated iron core made of multiple iron core members are laminated in the axial direction, wherein multiple iron core members are by right Electromagnetic steel plate carries out punch process and is punched into, as shown in Figure 1, inserting in being centrally formed with for rotor core 11 for drive shaft 12 The through-hole 113 entered.Also, it is equipped on rotor core 11 towards peripheral side multiple protrusions 111 outstanding.Protrusion 111 is equidistant Ground is arranged in the circumferential direction of rotor core 11.That is, rotor core 11 is in gear-like when from axial viewing.Setting is prominent The purpose in portion 111 be in order to make inductance generate difference because rotor 10 is different relative to the relative position of stator 20, such as can also With are as follows: in recess portion periphery, there are the rotor cores of thin-walled, and the periphery of entire rotor 10 is in positive round.Also, protrusion 111 is not yet It is centainly strictly in be arranged at equal intervals.

< stator >

Stator 20 has stator core 21, permanent magnet 22, excitation winding 23 and armature winding 24.

Stator core 21 is formed as circular by soft-magnetic body.In this embodiment, stator core 21 is that stacking is more in the axial direction Laminated iron core made of a iron core member, wherein multiple iron core members are punched and carrying out punch process to electromagnetic steel plate At.Fig. 2 is the figure from the axial stator core 21 seen.As shown in Fig. 2, stator core 21 has 212 He of stator yoke Multiple teeth 211.Stator yoke 212 is the part for the peripheral side for having circular shape and being formed in stator core 21.Also, Each tooth 211 is from the inner peripheral surface of stator yoke 212 towards inner circumferential side part outstanding.In the example in figure 2,24 are equipped with A tooth 211, above-mentioned tooth 211 provide spacing arrangement around axle center P in the circumferential.It will be formed between each tooth 211 as a result, Space.

These spaces being formed between tooth 211 are worked as slot 213, and permanent magnet 22 is disposed in slot 213, is encouraged Magnetic winding 23, armature winding 24.These slots 213 divide for excitation slot 213a and armature slot 213b both, each slot is designed with It is multiple.Specifically, excitation slot 213a is arranged to: being clipped between two excitation slot 213a adjacent in the circumferential in slot 213 One slot.Also, armature slot 213b is the slot in slot 213 in addition to excitation slot 213a.That is, excitation slot 213a and armature Slot 213b is alternately arranged in circumferential direction.It should be noted that in the following description, for such as excitation slot 213a, armature slot 213b or the like quantity is multiple constituent elements, can be after reference symbol when to illustrate a certain specific structure etc. Add branch number (such as 213a-1,213a-2 ... etc.) in face.

Permanent magnet 22-

Multiple permanent magnets 22 are equipped in stator 20.In this embodiment, each permanent magnet 22 has used rare earth element So-called rare-earth magnet.More specifically, permanent magnet 22 be with neodymium, iron, boron magnet as main component (neodymium iron boron class magnet), It and is alloy that is as needed and including heavy rare earth element (specially dysprosium (Dy) or terbium (Tb)) or comprising using grain boundary decision Method only makes the surface rare-earth magnet containing sintered magnet made of heavy rare earth element nearby.

Section (face that can be seen in Fig. 1) on the direction orthogonal with axle center P of the permanent magnet 22 is square (in the example In radially be longitudinal direction rectangle), the axial length of axial length and stator core 21 is roughly equal.Namely It says, the permanent magnet 22 of present embodiment is in cuboid.Also, these permanent magnets 22 so that the magnetic pole strength of identical polar in week Opposite mode is arranged in excitation slot 213a (referring to Fig.1) upwards.That is, permanent magnet 22 is circumferentially magnetized, this A little permanent magnets 22 are arranged to: making the side that alternately the magnetic pole strength direction with opposed polarity is circumferential.

Excitation winding 23-

Excitation winding 23 is the winding for controlling the magnetic flux of permanent magnet 22.Excitation winding 23 on tooth 211 simultaneously It is arranged in excitation slot 213a.In this embodiment, in a pair of of the tooth 211 clamped by a pair of of excitation slot 213a circumferentially adjacent to each other There are two excitation windings 23 for winding on (following also referred to as a pair of of excitation tooth 211a).Specifically, two excitation windings 23 are distinguished Using the axis radially extended as wireline reel and on above-mentioned a pair of of excitation tooth 211a.That is, by a pair of of excitation tooth 211a regards a tooth as, with concentrated winding (concentrated winding) by two excitation windings 23 wound on above-mentioned tooth On.So, in the present embodiment, there are two excitation windings 23 for storage in an excitation slot 213a.In this embodiment, it encourages Two excitation windings 23 in magnetic slot 213a circumferentially arrange.Fig. 3 show from the axial excitation winding 23 seen and armature around The deployment scenarios of group 24.It should be noted that in Fig. 3, for ease of clearly showing the boundary line between winding, and by winding Between interval expand show.But although in fact, the gap between winding is arbitrary, it is preferably exhausted in clamping It is essentially a zero in the case where the part of edge.

For ease of carrying out above-mentioned arrangement, each excitation winding 23 is formed by so-called edgewise coil.Edgewise coil It is coil made of flat conductor (such as being formed as the copper) bending for being rectangle section.Specifically, edgewise coil is logical Crossing makes one of the narrower width in the remaining four sides other than the both ends of the surface of flat conductor inward-facing to be bent winding and shape At, and there is insulating film on the outer surface.By using the edgewise coil, excitation winding can be formed with high dimensional accuracy 23.It should be noted that the length of the long side in the section of flat conductor (rectangle) to be referred to as to " the width of flat conductor below W ", and the length of short side is referred to as to " the thickness t " of flat conductor.

Armature winding 24-

Armature winding 24 is the winding for being used to form rotating excitation field.In order to form rotating excitation field, supplied to armature winding 24 Alternating current.For example, three-phase alternating current will be made to flow to armature using threephase armature winding as armature winding 24 Winding 24 flows.The alternating current flowed to armature winding 24 can be controlled by inverter circuit etc..

In stator 20, armature winding 24 is on tooth 211 and is arranged in armature slot 213b.More specifically, In It is wound on a pair of of the tooth 211 (also referred to as a pair of armature tooth 211b below) clamped by circumferentially adjacent a pair of of armature slot 213b Armature winding 24.Specifically, armature winding 24 is using the axis that radially extends as wireline reel and wound on a pair of of armature tooth On 211b.That is, regarding a pair of of armature tooth 211b as a tooth, with concentrated winding by armature winding 24 wound on above-mentioned tooth On.It is explained referring in particular to Fig. 1, such as armature winding 24-1 is wound on a pair being made of tooth 211-1 and tooth 211-2 On armature tooth 211b, wherein a pair of of armature tooth 211b is clamped by circumferentially adjacent armature slot 213b-1 and armature slot 213b-2.

Similarly, armature winding 24-2 is on a pair of of the armature tooth 211b being made of tooth 211-4 and tooth 211-5, In, a pair of of armature tooth 211b is clamped by circumferentially adjacent armature slot 213b-1 and armature slot 213b-3.So, in this reality It applies in mode, there are two armature winding 24 for storage in an armature slot 213b.

In the present embodiment, each armature winding 24 is made of one group of edgewise coil (following also referred to as around group), and is in Square tube shape.More specifically, armature winding 24 around group was made of three edgewise coils by being formed around group.Equally Ground by using edgewise coil, and can be formed in armature winding 24 with high dimensional accuracy.

In the present embodiment, in order to increase the number of turns of armature winding 24 as far as possible, each edgewise coil around group is constituted It is respectively provided with shape feature.Fig. 4 is the perspective view for showing the armature winding 24 (around group) seen from inner circumferential side.Also, Fig. 5 It is the perspective view for showing the armature winding 24 seen from peripheral side.Also, Fig. 6 is to show composition around group (armature winding 24) Each edgewise coil perspective view.As shown in fig. 6, armature winding 24 is by central portion winding 24a, inside portion winding 24b and outside Side winding 24c is constituted.Identical as excitation winding 23, these windings 24a, 24b, 24c are made of flat conductor.In this embodiment, The flat conductor for constituting these windings 24a, 24b, 24c uses width W and thickness t and the flat conductor for being used for excitation winding 23 Width W and the equal flat conductor of thickness t.

Central portion winding 24a-

Central portion winding 24a is an example of the first winding of the invention.In this embodiment, due to being laminated in each tooth 211 There is the iron core member of same shape, it is possible to regard what armature winding 24 was rectangle wound on the section orthogonal with wireline reel as On one tooth.Therefore, central portion winding 24a is formed as square tube shape (referring to Fig. 4, Fig. 6).That is, when watching central portion along wireline reel When winding 24a, the axial direction of motor 1 becomes length direction (long side), and the Bian Zehui of shorter side is towards tooth 211.It needs to illustrate It is, referred to below for convenient for explanation, the part for being equivalent to the rectangular short side of central portion winding 24a to be referred to as short leg 24a_s。

As already mentioned above, axial end face of the short leg 24a_s towards tooth 211, and be equivalent to central portion around The end turn of group 24a.In this embodiment, as described in detail below, central portion winding 24a is being installed on armature In the state of tooth 211b, the size (referred to as axial length H) on the length direction of central portion winding 24a is set, so as in electricity Gap is formed between the axial end face and short leg 24a_s of armature tooth 211b.Axial length H is the most short distance between short leg 24a_s From.In this embodiment, the width W of the substantially flat conducting wire in gap between central portion winding 24a and armature tooth 211b.It needs to illustrate , as shown in figure 3, the radial width (specially the number of turns) of central portion winding 24a is set to: guaranteeing central portion winding 24a It is accommodated between excitation winding 23o and excitation winding 23i radially.

Inside portion winding 24b-

Inside portion winding 24b is an example of the second winding of the invention.Inside portion winding 24b is set as than central portion winding (referring to Fig. 4) on the position of the inner side 24a.Inside portion winding 24b is formed as square tube shape (referring to Fig. 4, Fig. 6).With regard to the square tube For, the section orthogonal with wireline reel is rectangle, and the side of the rectangular longer side is towards the axial direction of motor 1.That is, When watching inside portion winding 24b along wireline reel, inside portion winding 24b becomes length direction (long side) in the axial direction of motor 1 Rectangle.It should be noted that referred to below for convenient for explanation, by inside portion winding 24b to be equivalent to this rectangular The part of short side is referred to as short leg 24b_s, and the part that will be equivalent to long side is referred to as long leg 24b_l.The face short leg 24b_s To the axial end face of tooth 211, and it is equivalent to the end turn of inside portion winding 24b.

Moreover, in the winding 24b of inside portion, each short leg 24b_s is respectively to radial outside (that is, central portion winding 24a The side short leg 24a_s) bending.Herein, will to produce curved part in the short leg 24b_s of inside portion winding 24b referred to as curved Pars convoluta 24b_b.

The face by 211 side of tooth of the short leg 24a_s of the bending section 24b_b and central portion winding 24a of inside portion winding 24b Overlapping (referring to Fig. 4).As already mentioned above, the axial length H (referring to Fig. 4) of central portion winding 24a is configured to: being guaranteed The gap for being roughly equivalent to the width W of flat conductor is formed between each short leg 24a_s and tooth 211 of central portion winding 24a. Therefore, each bending section 24b_b will enter between tooth 211 and central portion winding 24a.

Outside portion winding 24c-

Outside portion winding 24c is also an example of the second winding of the invention.Outside portion winding 24c is set as than central portion winding On the position of the outer side 24a.Outside portion winding 24c is again formed as square tube shape (referring to Fig. 6).Similarly, with regard to the outside portion around For the square tube of group 24c, the section orthogonal with wireline reel is rectangle, and the side of the rectangular longer side is towards motor 1 axial direction.It should be noted that referred to below for convenient for explanation, by outside portion winding 24c to be equivalent to this rectangular short The part on side is referred to as short leg 24c_s.Axial end face of the short leg 24c_s towards tooth 211, and it is equivalent to outside portion winding The end turn of 24c.

Each short leg 24c_s of outside portion winding 24c has to the curved part of radially inner side and unbent straight Partially (referring to Fig. 6).Hereinafter, the part being bent in short leg 24c_s to radially inner side is referred to as bending section 24c_b, and will Unbent part is referred to as flat part 24c_f.In the present embodiment, as shown in fig. 6, in each short of outer side winding 24c In edge 24c_s, bending section 24c_b and flat part 24c_f is overlapped each other in a manner of making bending section 24c_b be located at 211 side of tooth. That is, in the part for being equivalent to end turn, flat conductor is overlapped in the axial direction each other in outer side winding 24c.

Also, in outer side winding 24c, each bending section 24c_b also short leg 24a_s with central portion winding 24a Overlapping (referring to Fig. 5).As already mentioned above, the axial length H (referring to Fig. 4) of central portion winding 24a is configured to: being guaranteed The gap for being roughly equivalent to the width W of flat conductor is formed between the short leg 24a_s and tooth 211 of central portion winding 24a.Cause This, each bending section 24c_b will enter between tooth 211 and central portion winding 24a.

The positional relationship-of each coil and permanent magnet

When watching the positional relationship of excitation winding 23 and permanent magnet 22, as shown in Figure 1, each permanent magnet 22 is being encouraged From peripheral side and this two sides of inner circumferential side towards excitation winding 23 in magnetic slot 213a.More specifically, relative to a pair of of excitation tooth 211a is set there are two excitation winding 23, these excitation windings 23 are from the inner circumferential side of permanent magnet 22 and this two sides of peripheral side and permanent Magnet 22 contacts.When from this one end of the inflow side of the electric current from power supply 30 watch when, clip permanent magnet 22 and in inner circumferential side The coiling direction of excitation winding 23 opposite each other is identical each other with peripheral side.

It should be noted that in the following description, in 23 He of excitation winding for needing to distinguish the inner circumferential side of permanent magnet 22 In the case where the excitation winding 23 of the peripheral side of the permanent magnet 22, add behind the reference symbol of the excitation winding 23 of inner circumferential side A upper suffix " i " and be denoted as excitation winding 23i, and plus after one behind the reference symbol of the excitation winding of peripheral side 23 Sew " o " and is denoted as excitation winding 23o.Also, in the feelings of the specific winding being conceived in excitation winding 23i, excitation winding 23o etc. Under condition, also branch number (such as 23i-1,23o-1 etc.) is added after suffix.

When referring in particular to Fig. 1 come the deployment scenarios of the permanent magnet 22 watched in present embodiment and excitation winding 23, Excitation winding 23o-1 is on a pair of of the excitation tooth 211a being made of tooth 211-2 and tooth 211-3, wherein a pair of of excitation tooth 211a is clamped by excitation slot 213a-1 circumferentially adjacent to each other and excitation slot 213a-2.Excitation winding 23o-1 is located at than forever Long magnet 22-1, the outer side permanent magnet 22-2 position on.Similarly, excitation winding 23i-1 is wound on tooth 211-2 and tooth On 211-3.Excitation winding 23i-1 is located on the position of side more inner than permanent magnet 22-1, permanent magnet 22-2.

As needed, excitation is carried out to above-mentioned excitation winding 23 with direct current.Therefore, excitation winding 23 is connect with power supply 30 (referring to Fig.1).It should be noted that various power supplys can be used as the power supply 30 for supplying direct current to excitation winding 23.Example Power supply is such as used as by using chopper circuit (including buck circuit, boost chopper or stepping-up/stepping-down chopper circuit) 30, so as to easily control the DC current flowed to excitation winding 23.That is, being flowed to excitation winding 23 straight Even galvanic electricity includes ripple component.

It should be noted that in the present embodiment, all excitation winding 23o of the peripheral side of permanent magnet 22 go here and there each other Connection.Similarly, all excitation winding 23o of the inner circumferential side of permanent magnet 22 are also one another in series.

Also, when observing the relationship of permanent magnet 22 and armature winding 24, in this embodiment, armature winding 24 crosses over regulation Excitation slot 213a, and end turn is to guarantee a part of the armature winding 24 in the excitation slot 213a crossed over forever It is arranged by way of on the axial end face of long magnet 22.Fig. 3 shows the deployment scenarios of the end turn of armature winding 24 etc..Example Such as, when being conceived to armature winding 24-1, as shown in figure 3, armature winding 24-1 crosses over excitation slot 213a-1.At this point, armature around End turn part (short leg 24a_s) at the central portion winding 24a of group 24-1 is arranged as on permanent magnet 22-1 (axial On end face) pass through.

Moreover, armature winding 24-1 is accommodated in armature slot 213b-1.It there also is provided in armature slot 213b-1 another A armature winding 24-2.For the stator 20, in armature slot 213b, circumferentially arranges and be disposed with armature winding 24.Example Such as, it in armature slot 213b-1, circumferentially arranges and is disposed with armature winding 24-1 and armature winding 24-2 (referring to Fig.1, figure 3).Hereinafter, similarly, in the present embodiment, being arranged with the line of totally ten two armature winding 24 in the end face of stator core 21 Enclose end.

The positional relationship-of armature winding and excitation winding

In the present embodiment, in order to increase the number of turns of armature winding 24 as far as possible, to armature winding 24 and excitation winding 23 Between positional relationship (the specially mutual overlapping of winding) studied.Fig. 7 is to show to be equivalent to the VII-VII of Fig. 3 and cut open The sectional axonometric drawing of the stator 20 in face.Also, Fig. 8 is to show the solid of the stator 20 for the VIII-VIII section for being equivalent to Fig. 3 to cut open Face figure.The end (being equivalent near square tube corner) of the bending section 24b_b of inside portion winding 24b enters excitation winding 23 (referring to Fig. 7) between end turn 23a and the tooth 211 for being wound with the excitation winding 23.In order to realize this structure, it is specified that encouraging The axial length H2 of magnetic winding 23, to guarantee to be formed the width W phase substantially with flat conductor between excitation winding 23 and tooth 211 Deng gap.Axial length H2 is the shortest distance between short leg.

Similarly, the end (also corresponding near square tube corner) of the bending section 24c_b of outside portion winding 24c enters (referring to Fig. 8) between the end turn 23a of excitation winding 23 and the tooth 211 for being wound with the excitation winding 23.Due to excitation around It is formed with gap substantially equal with the width W of flat conductor between group 23 and tooth 211, so being capable of this knot easy to accomplish Structure.It should be noted that inside portion winding 24b and outside portion winding 24c respective bending section 24b_b, 24c_b are formed are as follows: In In the state that inside portion winding 24b and outside portion winding 24c are Chong Die with excitation winding 23, bending section 24b_b, 24c_b are in radial direction On it is not outstanding from excitation winding 23.

As described above, in the present embodiment, inside portion winding 24b and outside portion winding 24c are respectively provided with to enter and encourage Part between the end turn 23a of magnetic winding 23 and the tooth 211 for being wound with the excitation winding 23.As a result, in armature winding 24 The part Chong Die with excitation winding 23 can increase the number of turns of armature winding 24.In this embodiment, with only increase armature around The number of turns of group 24 and compared with being not provided with the part that excitation winding 23 is overlapped the case where, the axial complete of armature winding 24 can be reduced Long (distance between end turn).

The effect > of < present embodiment

As described above, in the present embodiment, armature winding 24 and excitation winding 23 are configured to be equivalent to end turn Part overlap each other.Therefore, in present embodiment (mixed excited magnetic pass switch motor), it can be avoided the big of end turn Type, while the conductor cross sectional area of the armature winding in slot can be increased.

Also, in the winding method of present embodiment, it can be easy to use edgewise coil, as a result, can be realized The reduction of the copper loss of motor 1, the raising of occupation efficiency.It should be noted that also holding in the winding method of present embodiment Edgewise coil is easily replaced using flat-wise coil.In the case where using flat-wise coil, the copper loss of motor 1 also can be realized Reduction, occupation efficiency raising.

(second embodiment of invention)

Fig. 9 is the perspective view for showing the armature winding 24 in second embodiment.In Fig. 9, for ease of understanding armature The deployment scenarios of winding 24, and the diagram of stator core 21, excitation winding 23, permanent magnet 22 is omitted.In present embodiment Stator 20 in, be alternately arranged in the circumferential only by the central portion winding 24a armature winding 24 constituted and by including interior The armature winding 24 of side winding 24b and outside portion winding 24c constituted around group.

In this configuration, also identical with first embodiment, it can be avoided the enlargement of end turn, while can increase The conductor cross sectional area of armature winding in slot.

(the third embodiment of invention)

Figure 10 is the perspective view for showing the armature winding 24 in third embodiment.In Figure 10, also for should be readily appreciated that The deployment scenarios of armature winding 24, and the diagram of stator core 21, excitation winding 23, permanent magnet 22 is omitted.In this implementation In the stator 20 of mode, it is alternately arranged in the circumferential only by the inside portion winding 24b armature winding 24 constituted and by wrapping Include the armature winding 24 of central portion winding 24a and outside portion winding 24c constituted around group.

In this configuration, also identical with first embodiment, it can be avoided the enlargement of end turn, while can increase The conductor cross sectional area of armature winding in slot.

(other embodiment)

It should be noted that constituting central portion winding 24a, the inside portion winding 24b, outside portion winding of armature winding 24 24c can also and tie, making above-mentioned winding 24a, 24b, 24c and in the case where tie, preferably resistance and the number of turns is each other It is identical.

Also, in addition to motor 1, the structure of the winding 23,24 illustrated in the above-described embodiment can also be applied to Generator.

Also, number, the number of the protrusion 111 of rotor 10 of the tooth 211 in stator 20 are also example, are not limited to implement The listed example enumerated in mode.

Also, the material of permanent magnet 22 is example, can also be made of forever the ferromagnetic material without heavy rare earth element Long magnet 22.

Industrial applicability-

The present invention is useful as rotating electric machine.

Symbol description-

1 motor (rotating electric machine)

11 rotor cores

21 stator cores

22 permanent magnets

23 excitation windings

23a end turn

24 armature winding

24a central portion winding (the first winding)

The inside portion 24b winding (the second winding)

The outside portion 24c winding (the second winding)

211 teeth

213 slots

213a excitation slot

213b armature slot