JPH10234144A - Concentrated winding electric rotating machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a small, lightweight, rigid and high-efficiency concentrated winding electric rotating machine by splitting the stator core as auxiliary salient poles in the circumferential direction and securing the auxiliary salient poles by a supporting member, thereby binding respective stator core sections. SOLUTION: A split core 41 comprises auxiliary salient poles 411, 412, and three stator winding salient poles to be wound with a stator winding arranged at a constant interval between them. Similarly, a split core 42 comprises auxiliary salient poles 421, 422, and three stator winding salient poles which are arranged at a constant interval between them, and a split core 43 comprises auxiliary salient poles 431, 432, and three stator winding salient poles arranged at a constant interval between them. The salient poles 411, 412, 421, 422, 431, and 432 are provided with supporting members 10, 101, 102 and 100 for coupling split stators 41, 42 and 43 and enhancing the coupling strength, such that a stator 4 is clamped in the axial direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a concentrated winding rotary electric machine.

[0002]

2. Description of the Related Art An electric motor used for an electric vehicle such as an electric vehicle is desired to be small, lightweight and highly efficient in view of economical traveling and improvement of a traveling distance per unit of battery. For this reason, it is known that a brushless motor utilizing a permanent magnet type first and a reluctance secondly are most suitable.
Particularly in the field of small machines, brushless motors and the like employ a concentrated winding system in which a stator winding is wound around a stator winding magnetic pole.

[0003] This prior art is known from Japanese Patent Application Laid-Open No. 7-298522.

[0004]

In the above-mentioned prior art, the coil ends of the stator windings can be shortened by intensively winding the stator windings around the stator poles divided in the circumferential direction. The physique can also be reduced.

[0005] However, since the stator winding is wound directly for each stator winding magnetic pole, the time required for winding and connecting the coils is long, and it is difficult to align and wind the coils. There were drawbacks.

[0006] Further, when the divided stator magnetic poles are joined, since there are many joining points and the joining area is small, the number of assembling steps increases and the strength as the stator core decreases.
Further, there is a disadvantage that the equivalent area of the magnetic flux channel is reduced.

SUMMARY OF THE INVENTION An object of the present invention is to provide a robust, compact, lightweight, and highly efficient concentrated winding rotary electric machine.

[0008]

In order to achieve the above object, the present invention provides a stator winding salient pole having concentratedly wound stator windings and an auxiliary salient pole not winding stator windings. A stator core provided with a stator yoke serving as a flow path of the magnetic flux of each salient pole, and a rotor opposed to the stator core with a rotation gap and having polarities arranged at substantially equal intervals in a circumferential direction. The stator core is divided in the circumferential direction with the auxiliary salient poles as division positions.

In the present invention, preferably, the auxiliary salient poles are fixed by a support member, and the stator cores are connected.

Another aspect of the present invention is a stator winding salient pole in which stator windings are concentratedly wound, auxiliary salient poles in which stator windings are not wound, and a flow path of magnetic flux of each salient pole. A stator core having a stator yoke, and a concentrated winding rotary electric machine comprising a rotor opposed to the stator core with a rotation gap and having polarities arranged at substantially equal intervals in the circumferential direction. The stator core is divided into a stator winding having a stator yoke and auxiliary salient poles having a stator yoke.

Preferably, the stator windings are connected by auxiliary salient poles.

In the present invention, preferably, the materials and configurations of the stator winding and the auxiliary salient pole are the same.

In the present invention, preferably, the materials and configurations of the stator winding and the auxiliary salient pole are different.

[0014]

Embodiments of the present invention will be described below.

FIG. 1 is a plan view of a concentrated winding rotary electric machine according to the present invention,
FIG. 2 is a perspective view of a split stator core of the concentrated winding rotary electric machine, and FIG.
Shows a perspective view of the auxiliary salient pole, and FIG. 4 shows a sectional view of the concentrated winding electric machine of the present invention. In this example, the number of stator winding salient poles is nine, and the number of permanent magnet poles of the rotor is ten.

In FIG. 1, a permanent magnet rotating electric machine 1 includes a stator 2 and a rotor 3, and the stator 2 includes a stator core 4 and a stator winding 5. The stator winding 5 has, for example, U1 +, U2-, U3 + for the U-phase, and V1 +, V2-, V- for the V-phase.
W1 +, W2-, and W3 + are connected to the 3+ and W phases, respectively. Here, the subscript 1 indicates the stator winding number, and + and-indicate the winding direction of the stator winding 5.

Here, the stator core 4 is composed of a stator yoke serving as a magnetic flux flow path and stator winding salient poles around which the stator winding is wound. The auxiliary salient poles 411, 412, 421, 422, 4
31 and 432 are formed, and 3 at intervals of 120 degrees in the circumferential direction.
It is divided (41, 42, 43). That is, the split iron core 41 includes the auxiliary salient poles 411 and 412 and the auxiliary salient pole 41.
Three stator winding salient poles around which the stator winding is wound between 1 and 412 are formed at equal intervals. Similarly, the split iron core 42 is formed with auxiliary stator poles 421 and 422 and three stator winding salient poles around which the stator winding is wound between the auxiliary salient poles 421 and 422. Similarly, the split core 43
Are auxiliary salient poles 431 and 432 and auxiliary salient poles 431 and 4
Three stator winding salient poles around which the stator winding is wound are formed at equal intervals. The auxiliary salient poles 411, 4
12, 421, 422, 431, and 432 are connected to the split stators 41, 42, and 43, and support members 10, 101, 102, and 100 for improving the bonding strength are provided on the stator 4,
Is provided so as to be sandwiched in the axial direction. Although only one support member 100 is shown on the opposite side, a support member is provided to face the support members 101 and 102. FIG. 2 shows a perspective view of one split stator core 41 among the three split stator cores 4. In this example, the stator winding 5 is omitted.

As described above, the dividing portion 13 is formed as an auxiliary salient pole because the contact surface when the divided stator cores 41, 42 and 43 are joined is made long to suppress a decrease in the amount of magnetic flux. This is a measure for improving the bonding strength when connecting the terminals 41, 42, 43.

On the other hand, the rotor 3 is configured such that the permanent magnets 6 adjacent to each other at substantially equal pitches have different polarities in the circumferential direction. As shown in FIGS. 1 and 4, a rotor yoke 7 for passing the magnetic flux of the permanent magnet 6 is provided on the inner periphery of the permanent magnet, and a shaft 8, bearings 11 and 111 are provided.
Are rotatably held by the end brackets 12 and 121 via the. Here, the configuration is shown in which the frame 9 is provided on the outer periphery of the stator core 4, but the frame may be omitted if necessary.

The structure of the support member will be described with reference to FIG.
Here, auxiliary salient poles 411, 4 of split stators 41 and 43 are provided.
Only 32 parts are shown. The shapes of the portions of the support members 10 and 100 extending in the rotor direction are auxiliary salient poles 411 and 432.
Are substantially equal to the shape in a state where they are combined. In addition, the shape of the outer peripheral side of the support members 10 and 100 is
43 is formed so as to have a sufficient area to connect and reinforce, and has a substantially fan shape. Further, the support member 1
At 0 and 100, two fixing holes 11 for fixing the divided stators 41 and 43 are provided in the substantially fan portion and two auxiliary salient poles in this example. The fixing holes 11 of the support members 10 and 100 are also provided in the split stator cores 411 and 432 so as to correspond to the fixing holes 11 of the support members 10 and 100. The fixing holes provided in the split stator cores 41 and 43 may penetrate, but may be provided near the surfaces of the split stator cores 41 and 43. In the former case, the support members 10, 100 and the split stators 41, 43 are fixed by through bolts (not shown).
The fixed stator core 41,
43 can be tightened by the support members 10 and 100, so that the coupling strength can be further improved. Further, since the outer peripheral portions of the divided stator cores 41 and 43 and the auxiliary salient poles can be sufficiently pressed from both sides, vibration between the laminated stator cores can be suppressed, and electromagnetic noise can be reduced.

On the other hand, in the latter case, the fixing between the support members 10 and 100 and the split stator cores 41 and 43 is performed by cutting screws of a required length into the fixing holes of the split stator cores 41 and 43, respectively. 100 is attached and reinforced with bolts of a required length or the like. In this case, the support members 10, 1
Since 00 can be fixed only with bolts, workability can be improved. In particular, it is effective for a rotating electric machine that does not generate a large torque like a small machine.

In the above configuration, the shape of the support members 10 and 100 on the magnetic flux flow path side has been described as a substantially fan shape, but the same applies to the annular shape along the peripheral surface of the stator core 4. Further, since the stator core 4 can be sandwiched all around, the variation in the thickness can be reduced.

FIG. 5 shows another embodiment of the concentrated winding rotary electric machine according to the present invention.

3 is different from FIG. 3 in that the support members 14 and 140 are formed in a substantially U-shape having an opening on one side.
And 432 approximately match the shape of the combined state. The auxiliary salient pole 4 is formed by the substantially U-shaped reinforcing members 14 and 140.
11, 431 are sandwiched from both sides. The substantially U-shaped support members 14 and 140 may be simply press-fitted into the auxiliary salient poles, but if they are fixed together with an adhesive or the like, the joint strength can be further improved. According to the above configuration, since the fixing holes for fixing the support members 14 and 140 to the split stator cores 41 and 43 are not required, the amount of magnetic flux can be effectively used without obstructing the flow path of the magnetic flux. Can be.
Further, since the auxiliary salient poles 411 and 431 are sandwiched from both sides, the divided portions 13 can be firmly connected to each other, thereby preventing a reduction in the magnetic flux flow path. In the above example, the support members 14, 14
0 is sandwiched from both sides of the split stator cores 41 and 43, but only one of them (140) is used,
The length from the bottom of the substantially U-shape to the opening may be substantially equal to the axial length of the split stator cores 41 and 43. In this case, it is only necessary to insert the support member 14 (140) from one side, so that the number of parts is reduced and the cost can be reduced. FIG. 6 shows another embodiment of the concentrated winding rotary electric machine of the present invention.

The difference from FIG. 5 is that the support member 15 is formed in a substantially rectangular parallelepiped shape having a through hole, and the shape of the through hole is changed to the auxiliary salient pole 4.
11 and 432 are substantially matched to the shape of the combined state. The reinforcing member 15 is inserted into the auxiliary salient poles 411 and 431 from the inner peripheral side of the split stator cores 41 and 43. The support member 15 may be simply press-fitted into the auxiliary salient pole. However, as in the embodiment of FIG. 5, when the support member 15 is fixed together with an adhesive or the like, the bonding strength can be further improved. According to the above configuration, the auxiliary salient poles 411 and 43 are
2 can be fixed uniformly from all sides. In the above example, the supporting members 14, 140 and 15 are connected to the auxiliary salient poles 411,
Although the description has been given of the configuration formed only in 432, it may be combined with the substantially fan-shaped portion described in FIGS.

FIG. 7 shows another embodiment of the concentrated winding rotary electric machine according to the present invention.

The difference from FIG. 3 is that the auxiliary salient pole 16 is separated from the divided stator cores 41 and 43 and the divided stator cores 41 and 43 are connected by the integrally formed auxiliary salient pole 16. Therefore, the stator winding is divided into a stator winding on which the stator winding is wound and auxiliary salient poles, and each is divided into three equal parts. The auxiliary salient pole 16 is
The split auxiliary salient poles 411 and 432 shown in FIG. 3 and the like are integrally formed, and the outer diameter and the inner diameter thereof substantially match the outer diameter and the inner diameter of the stator core 4. In addition, on the outer peripheral side of the auxiliary salient pole 16, that is, on the flow path of the magnetic flux, the mounting positioning portion 1 having a substantially convex shape is provided.
61, 162 are formed, and the split stator cores 41, 162 are formed.
43 are press-fitted into the substantially concave mounting positioning portions 171 and 193 provided in the magnetic flux passage. The mounting positioning portions 161 and 163 having a substantially convex shape and the mounting positioning portions 171 and 193 having a substantially concave shape are preferably identical in shape, and the mounting positioning portions 171 and 193 having a substantially concave shape are preferably mounted and positioned in a substantially convex shape. It is slightly smaller than the parts 161 and 162. According to the above configuration, the split stator core 4
Since the auxiliary salient poles 16 having an integrally independent configuration are used as members for coupling the stator cores 1 and 43, the shape of the auxiliary salient poles 16 can be arbitrarily selected, and if the stator core 4 has the same shape, the stator Applicable to models with different numbers of winding salient poles.

FIG. 8 shows another embodiment of the concentrated winding rotary electric machine according to the present invention.

The difference from FIG. 7 is that the auxiliary salient poles 18 are integrally formed.
Is a block configuration. The auxiliary salient pole 18 is shown in FIG.
Similarly to the above, there are provided mounting positioning portions 181 and 182 having a substantially convex shape, and form positioning and coupling at the time of assembly. According to the above configuration, since the auxiliary salient pole 18 has a block configuration, the manufacturing and processing of the auxiliary salient pole 18 can be easily performed, the dimensional accuracy at the time of processing can be increased, and the joining work with the split stators 41 and 43 can be performed. Becomes easier.

In the above example, the number of salient stator poles is nine and the number of permanent magnet poles is ten, but this is not a combination. For example, when the number of stator winding salient poles is 12 and the number of auxiliary salient poles is 3, similarly, each stator winding is wound between the auxiliary salient poles arranged at intervals of 120 degrees. Four stator winding salient poles are formed at equal intervals. That is, the number of stator winding salient poles arranged between the auxiliary salient poles is m / 3, where m is the total number of stator winding salient poles. In the above example, the number of auxiliary salient poles is three, but the number of auxiliary salient poles is not limited. Further, it is not always necessary to divide the auxiliary salient poles. For example, the effect of the present invention can be obtained even when the number of auxiliary salient poles is six and the auxiliary salient poles are located at 180 ° opposite positions.

FIG. 9 shows another embodiment of the concentrated winding rotary electric machine according to the present invention.

The difference from FIG. 3 is that the auxiliary salient poles 411 and 432
The distance Dh between the magnet and the permanent magnet 6 is determined by the stator winding salient poles U1 +, V
The point is that the distance Dm between the 3+ and the permanent magnet 6 is made larger than the distance Dm, and the support members 19 and 190 are formed with bent portions 19a and 190a. The bent portions 19a and 190a are bent at right angles to each other in the axial center direction, and preferably have the same shape as the tip shape of the auxiliary salient poles 411 and 432. On the other hand, auxiliary salient poles 411, 432 and stator winding salient poles U1 +, V3 +
Is not wound on the auxiliary salient poles 411 and 432, the performance of the motor is not affected. According to the above configuration, the support member 1
The fixed connection between the split stators 41 and 43 by the components 9 and 190 is further strengthened.

In the above description, the bent portions 19a, 19
0a presses the end portions of the auxiliary salient poles 411 and 432, but is not particularly limited by the lengths of the bent portions 19a and 190a. The effect is obtained. Further, FIG.
If the bent portions 19b and 190b are formed also on the outer peripheral side of the stator core 4 as described above, and the structure is sandwiched between the bent portions 19a and 190a, the bent portions 19a, 190a and 19b and 190b of the support members 19 and 190 are formed. Since the inner and outer peripheries of the stator core 4 are formed as guides, the rotating electric machine can be stably and firmly fixed, and can be provided with a durable and highly reliable rotating electric machine. In this case, if a flat portion (not shown) having a straight portion is formed on the outer periphery of the stator core corresponding to the auxiliary salient pole and the bent portion on the outer peripheral side is located on the flat portion, the support is further increased. The member can be stably fixed.

Although the concentrated winding rotary electric machine has been described above, in particular, a permanent magnet rotary electric machine having a permanent magnet rotor structure, the effect of the present invention can be exerted by a reluctance rotor. In addition, not only an electric motor but also a generator may be used, and the present invention can be applied to a rotating electric machine using an external rotation type, an internal rotation type rotor, or a claw pole type rotor. Further, the present invention can be applied not only to a rotating electric machine but also to a linear motor or the like.

[0035]

According to the present invention, the stator core is divided in the circumferential direction with the auxiliary salient pole as a dividing position, and the auxiliary salient pole is fixed by a support member to connect the respective stator cores, thereby providing a robust, compact and lightweight. A highly efficient concentrated winding electric machine is provided.

[Brief description of the drawings]

FIG. 1 is a plan view of a concentrated winding rotary electric machine according to the present invention.

FIG. 2 is a perspective view of one embodiment of a split stator core of the present invention.

FIG. 3 is a perspective view of an auxiliary salient pole of the present invention.

FIG. 4 is a sectional view of a concentrated winding rotary electric machine according to the present invention.

FIG. 5 is a perspective view of a second embodiment of the split stator core of the present invention.

FIG. 6 is a perspective view of a third embodiment of the split stator core of the present invention.

FIG. 7 is a perspective view of a fourth embodiment of the split stator core of the present invention.

FIG. 8 is a perspective view of a fifth embodiment of the split stator core of the present invention.

FIG. 9 is a perspective view of a sixth embodiment of the split stator core of the present invention.

FIG. 10 is a perspective view of a seventh embodiment of the split stator core of the present invention.

[Explanation of symbols]

4 ... stator core, 5 ... stator winding, 6 ... permanent magnet, 7 ...
Rotor yoke, 8 shaft, 9 outer peripheral frame, 1
0, 101, 102, ... support member, 11 ... bearing,
12 ... end bracket, 13 ... divided part, 41, 42,
43 ... Split stator core.

Continuing from the front page (72) Inventor Suetaro Shibukawa 2520 No. Odaiba, Hitachinaka City, Ibaraki Prefecture Inside the Automotive Equipment Division of Hitachi, Ltd.

Claims (16)

[Claims] 1. A stator winding salient pole in which stator windings are intensively wound, auxiliary salient poles in which the stator winding is not wound, and a fixed portion serving as a magnetic flux flow path of each salient pole. A concentrated winding rotary electric machine comprising: a stator core having a stator yoke; and a rotor opposed to the stator core with a rotation gap and having polarities arranged at substantially equal intervals in a circumferential direction. A concentrated winding rotary electric machine wherein an iron core is divided in a circumferential direction with the auxiliary salient pole being a division position. 2. A concentrated winding rotary electric machine according to claim 1, wherein said magnetic flux flow path and said auxiliary salient poles are fixed by a support member and said stator cores are connected. 3. A concentrated winding rotary electric machine according to claim 2, wherein said magnetic flux flow passage and said auxiliary salient poles are integrally fixed by a support member and said stator cores are connected. 4. The concentrated winding rotary electric machine according to claim 1, wherein said auxiliary salient poles are fixed by a support member and said stator cores are connected. 5. A stator winding salient pole on which stator windings are concentratedly wound, auxiliary salient poles on which said stator winding is not wound, and a fixed portion which serves as a flow path for magnetic flux of each of said salient poles. A concentrated winding rotary electric machine comprising: a stator core having a stator yoke; and a rotor opposed to the stator core with a rotation gap and having polarities arranged at substantially equal intervals in a circumferential direction. A concentrated winding rotary electric machine, wherein an iron core is divided into a stator winding having the stator yoke and an auxiliary salient pole having the stator yoke, and each is divided. 6. The concentrated winding rotary electric machine according to claim 5, wherein said stator windings are connected by said auxiliary salient poles. 7. A concentrated winding rotary electric machine according to claim 5, wherein said stator winding and said auxiliary salient pole have the same material and configuration. 8. A concentrated winding rotary electric machine according to claim 5, wherein said stator windings and said auxiliary salient poles have different materials and configurations. 9. A concentrated winding according to claim 1, wherein when a distance between the stator winding salient pole and the rotor surface is Dm and a distance between the auxiliary salient pole and the rotor surface is Dh, Dm <Dh. Rotating electric machine. 10. The concentrated winding rotary electric machine according to claim 9, wherein said magnetic flux channel and said auxiliary salient poles are fixed by a support member and said stator cores are connected. 11. A concentrated winding rotary electric machine according to claim 10, wherein said magnetic flux flow passage and said auxiliary salient poles are integrally fixed by a support member and said stator cores are connected. 12. The concentrated winding rotary electric machine according to claim 10, wherein said auxiliary salient poles are fixed by a supporting member and said stator cores are connected. 13. The method according to claim 10, 11 or 12,
A concentrated winding rotary electric machine, wherein a bent portion is formed on at least one of radial ends of the support member. 14. The concentrated winding rotary electric machine according to claim 13, wherein one of the bent portions is formed between the auxiliary salient pole and the surface of the rotor, and is in contact with the auxiliary salient pole. 15. The concentrated winding rotary electric machine according to claim 13, wherein one of the bent portions is formed on an outer peripheral side of the stator core, and is in contact with an outer peripheral surface of the stator core. 16. The stator according to claim 13, wherein the bent portion is formed between the auxiliary salient pole and the surface of the rotor and on the outer peripheral side of the stator core. A concentrated winding rotary electric machine in contact with the outer peripheral surface.