WO2022009620A1 - Dynamo-electric machine - Google Patents

Abstract

In the present invention, a dynamo-electric machine (10) has: first teeth in which a coil of the first of three phases is provided by having an armature winding (32) of the first phase be wound, and having the armature winding of the second of the three phases be wound fewer times than the number of windings of the armature winding of the first phase; second teeth in which the coil of the first phase is provided by having the armature winding of the first phase be wound, and the armature winding of the third of the three phases be wound fewer times than the number of windings of the armature winding of the first phase; and third teeth in which the coil of the first phase is provided by having the armature winding of the first phase and the armature winding of the third phase being wound in the same manner. The phase difference between the magnetomotive force of a partial winding of the first phase provided by having the armature winding of the first phase be wound on the third teeth and the magnetomotive force of a partial winding of the third phase provided by having the armature winding of the third phase be wound on the third teeth is within the range of 52 to 68 degrees in terms of the electrical angle.

Description

Rotating machine Cross-reference of related applications

This application is based on Japanese application number 2020-116575 filed on July 6, 2020, and the contents of the description are incorporated herein by reference.

This disclosure relates to a rotary electric machine.

Conventionally, a rotary electric machine having a first armature winding in which a three-phase current is supplied from a first inverter and a second armature winding in which a three-phase current is supplied from a second inverter is known. Has been done. In such a rotary electric machine, when a current phase difference occurs between the first inverter and the second inverter, the electromagnetic field generated in the gap between the rotor and the stator due to the armature winding is spatially unannounced. It will be balanced and torque ripple may occur.

Therefore, in the rotary electric machine of Patent Document 1, the coil body formed by winding the first armature winding and the second armature winding around the teeth and the first armature winding are included. It includes a coil body formed by winding around a tooth and a coil body formed by winding a second armature winding around a tooth, and each coil body is centered on an axial center. Are arranged 2n times rotationally symmetrically.

As a result, even when a current phase difference occurs, the electromagnetic field generated in the gap between the rotor and the stator can be spatially balanced and torque ripple can be suppressed. Therefore, vibration and noise can be suppressed.

Japanese Patent No. 5905176

In such a rotary electric machine, further suppression of vibration and noise is required, and it is considered that there is still room for technical improvement in response to the demand.

The present disclosure has been made in view of the above circumstances, and an object of the present disclosure is to provide a rotary electric machine capable of suppressing vibration and noise.

A first means for solving the above problems is in a rotary electric machine including a field portion having a plurality of magnetic poles having alternating polarities in the circumferential direction and an armature having a multi-phase armature winding. A three-phase current is supplied to the armature winding from the inverter, and the armature is wound around the armature winding of the first phase of the three phases and the armature of the second phase. The child winding is wound less than the number of turns of the armature winding of the first phase, so that the first tooth provided with the coil body of the first phase and the first of the three phases. The armature winding of the phase is wound, and the armature winding of the third phase is wound less than the number of turns of the armature winding of the first phase. The second tooth provided with the one-phase coil body, the armature winding of the first phase of the three phases, and the armature winding of the third phase are wound in the same manner. It has a third tooth to which the coil body of the first phase is provided, and the electromotive force of the partial winding of the first phase provided by winding the armature winding of the first phase around the third tooth. And the phase difference from the electromotive force of the third phase partial winding provided by winding the third phase armature winding around the third tooth is within the range of 52 degrees to 68 degrees in terms of electrical angle. It is set to be.

This makes it possible to cancel harmonic components, suppress torque ripple, and suppress vibration and noise.

A second means for solving the above problems is in a rotary electric machine provided with a field portion having a plurality of magnetic poles having alternating polarities in the circumferential direction and an armature having a multi-phase armature winding. A three-phase current is supplied to the armature winding from the inverter, and the armature includes the first tooth around which the armature winding of the first phase of the three phases is wound and the three-phase. Of these, the armature winding of the first phase is wound, and the armature winding of the second phase is wound less than the number of turns of the armature winding of the first phase. Two teeth and the armature winding of the second phase of the three phases are wound, and the armature winding of the first phase is based on the number of turns of the armature winding of the second phase. It has a third tooth that is wound less, and a partial winding of the first phase provided by winding the armature winding of the first phase with respect to the second tooth or the third tooth. The phase difference between the electromotive force of the wire and the electromotive force of the second phase partial winding provided by winding the second phase armature winding is within the range of 52 degrees to 68 degrees in terms of electrical angle. It is set to be.

This makes it possible to cancel harmonic components, suppress torque ripple, and suppress vibration and noise.

A third means for solving the above problems is in a rotary electric machine including a field portion having a plurality of magnetic poles having alternating polarities in the circumferential direction and an armature having a multi-phase armature winding. A three-phase current is supplied to the armature winding from the inverter, and the armature includes the first tooth around which the armature winding of the first phase of the three phases is wound and the three-phase. The second teeth around which the armature winding of the first phase is wound, the armature winding of the first phase of the three phases, and the armature winding of the second phase are the same. The third tooth is wound around the third tooth, and the armature winding of the first phase is wound around the third tooth to provide an armature winding of the first phase. The phase difference from the electromotive force of the second phase partial winding provided by winding the second phase armature winding on the tooth is set to be within the range of 52 degrees to 68 degrees in terms of electric angle. Has been done.

This makes it possible to cancel harmonic components, suppress torque ripple, and suppress vibration and noise.

The above objectives and other objectives, features and advantages of the present disclosure will be further clarified by the following detailed description with reference to the accompanying drawings. The drawing is
FIG. 1 is a vertical sectional view showing a motor. FIG. 2 is a cross-sectional view showing a motor. FIG. 3 is a diagram showing the electrical configuration of the control device. FIG. 4 is a diagram showing the arrangement of partial windings. FIG. 5 is a diagram showing a stator winding. FIG. 6 is a diagram showing harmonic components of torque. 7 (a) to 7 (c) are vector diagrams showing the magnetomotive force. FIG. 8 is a diagram showing fluctuations in electromagnetic force. FIG. 9 is a diagram showing the arrangement of the partial windings of the second embodiment. FIG. 10 is a cross-sectional view showing the motor of the second embodiment. FIG. 11 is a diagram showing the arrangement of the partial windings of the third embodiment. FIG. 12 is a cross-sectional view showing the motor of the third embodiment. FIG. 13 is a diagram showing the arrangement of the partial windings of the fourth embodiment. FIG. 14 is a cross-sectional view showing the motor of the fourth embodiment. FIG. 15 is a diagram showing the arrangement of the partial windings of the fifth embodiment. FIG. 16 is a cross-sectional view showing the motor of the fifth embodiment. 17A and 17B are vector diagrams showing the magnetomotive force of the fifth embodiment. FIG. 18 is a diagram showing the arrangement of the partial windings of the sixth embodiment. FIG. 19 is a cross-sectional view showing the motor of the sixth embodiment. FIG. 20 is a diagram showing the arrangement of the partial windings of the seventh embodiment. FIG. 21 is a cross-sectional view showing the motor of the seventh embodiment. FIG. 22 is a diagram showing the arrangement of the partial windings of the eighth embodiment. FIG. 23 is a cross-sectional view showing the motor of the eighth embodiment. FIG. 24 is a diagram showing the arrangement of the partial windings of the ninth embodiment. FIG. 25 is a cross-sectional view showing the motor of the ninth embodiment. FIG. 26 is a diagram showing the arrangement of the partial windings of the tenth embodiment. FIG. 27 is a cross-sectional view showing the motor of the tenth embodiment. FIG. 28 is a diagram showing the arrangement of the partial windings of the eleventh embodiment. FIG. 29 is a cross-sectional view showing the motor of the eleventh embodiment. FIG. 30 is a diagram showing the arrangement of the partial windings of the twelfth embodiment. FIG. 31 is a cross-sectional view showing the motor of the twelfth embodiment. FIG. 32 is a diagram showing the position of the leader line.

(First Embodiment)
Hereinafter, each embodiment will be described with reference to the drawings. In each of the following embodiments, the parts that are the same or equal to each other are designated by the same reference numerals, and the description thereof will be used for the parts having the same reference numerals. In the first embodiment, the motor 10 as a rotary electric machine will be illustrated and described.

The motor 10 shown in FIG. 1 is a permanent magnet field type synchronous machine, specifically, a permanent magnet field type synchronous machine having a three-phase winding. That is, the motor 10 is a brushless motor. The motor 10 includes a housing 20, a stator 30 fixed to the housing 20, a rotor 40 rotating with respect to the stator 30, and a rotating shaft 11 to which the rotor 40 is fixed. Hereinafter, in the present embodiment, the axial direction means the axial direction of the rotating shaft 11 (indicated by an arrow Y1 in the figure). The radial direction indicates the radial direction of the rotating shaft 11 (indicated by an arrow Y2 in the figure). The circumferential direction indicates the circumferential direction of the rotating shaft 11 (indicated by an arrow Y3 in the figure).

The housing 20 is formed in a cylindrical shape, and the stator 30 and the rotor 40 are housed in the housing 20. Bearings 23 and 24 are provided in the housing 20, and the rotating shaft 11 is rotatably supported by the bearings 23 and 24. The axis of the inner peripheral surface of the housing 20 is coaxial with the rotating shaft 11. An angle sensor 12 is provided on the tip end side of the rotating shaft 11. The angle sensor 12 may be a magnetic sensor or a resolver.

The stator 30 is provided in a cylindrical shape along the inner circumference of the housing 20 at substantially the center of the housing 20 in the axial direction. The stator 30 is fixed to the inner peripheral surface of the housing 20 with the axis O of the rotating shaft 11 as the center. The stator 30 constitutes a part of a magnetic circuit, and has an annular shape, and the stator core 31 (armature core, armature core, etc.) arranged so as to face each other in the radial direction on the outer peripheral side of the rotor 40. It has a stator core) and a stator winding 32 (armature winding, armature coil) wound around a stator core 31.

As shown in FIG. 2, the stator core 31 includes an annular back yoke 33 and a plurality of teeth T1 to T18 protruding from the back yoke 33 in the radial direction toward the rotation axis 11 and arranged side by side in the circumferential direction. A slot 35 (status lot) is formed between the adjacent teeth T1 to T18.

Slots 35 are provided side by side in the circumferential direction in the stator core 31, and the stator windings 32 are wound around the teeth T1 to T18 so that the stator windings 32 are arranged in the slots 35. In the present embodiment, the number of teeth T1 to T18 is "18", and the number of slots 35 is "18". For convenience of explanation, each of the teeth T1 to T18 is designated by the reference numerals T1 to 18 counterclockwise in the order of arrangement in the circumferential direction. The stator winding 32 is housed and held in the slot 35. Then, the stator winding 32 generates a magnetic flux by being supplied with electric power (AC power).

The stator core 31 is an integrated type formed by laminating a plurality of thin plate-shaped magnetic steel plates (core sheets) forming an annular shape in the axial direction of the stator core 31. The steel plate is formed by pressing and punching a strip-shaped electromagnetic steel plate material.

The rotor 40 constitutes a part of a magnetic circuit, has one or a plurality of pairs of magnetic poles in the circumferential direction, and is arranged so as to face the stator 30 in the radial direction. In the present embodiment, the rotor 40 corresponds to a field portion having 14 (that is, 7 magnetic pole pairs) magnetic poles. The rotor 40 includes a rotor core 41 made of a magnetic material and a permanent magnet 42 fixed to the rotor core 41. Specifically, as shown in FIG. 2, the rotor 40 is provided with 14 permanent magnets 42 as magnet portions so that the polarities alternate in the circumferential direction, and the rotor 40 is provided along the axial direction with the rotor core 41. A permanent magnet 42 is embedded in the accommodating hole provided therein.

The rotor 40 may have a well-known configuration, and may be, for example, an IPM type (Interior Permanent Magnet: embedded magnet type) rotor or an SPM type (Surface Permanent Magnet: surface magnet side) rotor. good. Further, as the rotor 40, a rotor on the field winding side may be adopted. In this embodiment, an IPM type rotor is adopted. A rotary shaft 11 is inserted through the rotor 40 and is fixed to the rotary shaft 11 so as to rotate integrally with the rotary shaft 11 around the rotary shaft 11.

A control device 50 is connected to the motor 10. The control device 50 is mainly composed of a microcomputer equipped with a CPU, ROM, RAM, I / O, etc., and the CPU realizes various functions by executing a program stored in the ROM. The various functions may be realized by electronic circuits that are hardware, or at least a part of them may be realized by software, that is, processing executed on a computer.

The function of the control device 50 is, for example, a function of converting electric power from the outside (for example, a battery) and supplying it to the motor 10 to generate a driving force. Further, for example, the control device 50 has a function of controlling the motor 10 (current control, etc.) by using the information regarding the rotation angle input from the angle sensor 12.

Further, as shown in FIG. 3, the control device 50 is provided with an inverter circuit 51. The inverter circuit 51 is composed of a full bridge circuit having the same number of upper and lower arms as the number of three phases. The control device 50 controls the current in each phase by turning on / off the switching element provided in each arm.

More specifically, as shown in FIG. 3, the inverter circuit 51 has a series connection body of an upper arm switch Sp and a lower arm switch Sn as switching elements in three phases consisting of a U phase, a V phase, and a W phase, respectively. I have. In the present embodiment, a voltage-controlled semiconductor switching element is used as the upper arm switch Sp and the lower arm switch Sn in each phase, and specifically, an IGBT is used. In addition, MOSFET may be used. Freewheel diodes (reflux diodes) Dp and Dn are connected in antiparallel to the upper arm switch Sp and the lower arm switch Sn in each phase, respectively.

The high potential side terminal (collector) of the upper arm switch Sp of each phase is connected to the positive electrode terminal of the battery. Further, the low potential side terminal (emitter) of the lower arm switch Sn of each phase is connected to the negative electrode terminal (ground) of the battery. The intermediate connection points between the upper arm switch Sp and the lower arm switch Sn of each phase are connected to one end (leader wires A1, B1, C1) of the stator winding 32, respectively.

By the way, noise and vibration based on torque ripple are problems in rotary electric machines. Since the 6th harmonic component or the 12th harmonic component is the main component of the torque ripple, it is desirable to suppress these. Therefore, the winding method of the stator winding 32 is configured as follows. Hereinafter, the winding method of the stator winding 32 will be described in detail.

The stator winding 32 is classified into U-phase, V-phase, and W-phase stator windings 32 that represent each of the three phases. As shown in FIGS. 4 and 5, the U-phase stator winding 32 has 12 partial windings U11-, U12 +, U13-, U14 +, U15-, U16 +, U21 +, U22-, U23 +, U24-. , U25 +, U26-. These U-phase partial windings are connected in series. The V-phase stator winding 32 is composed of 12 partial windings V11-, V12 +, V13-, V14 +, V15-, V16 +, V21 +, V22-, V23 +, V24-, V25 +, V26-. .. These V-phase partial windings are connected in series. The W-phase stator winding 32 is composed of 12 partial windings W11-, W12 +, W13-, W14 +, W15-, W16 +, W21 +, W22-, W23 +, W24-, W25 +, W26-. .. These W-phase partial windings are connected in series.

One end of these series connectors is connected to the neutral point Q, and the other end is connected to leader lines A1, B1, and C1 connected to the inverter circuit 51, respectively. A U-phase partial winding is connected to the leader wire A1, a V-phase partial winding is connected to the leader wire B1, and a W-phase partial winding is connected to the leader wire C1. .. In the stator winding 32 of the present embodiment, Y connection (star connection) is used, but delta connection may be used.

Further, as shown in FIGS. 2 and 4, the 36 partial windings are provided by winding the stator winding 32 around each of the teeth T1 to T18. For example, the teeth T1 is provided with a partial winding U12 + and a partial winding V24−. In the teeth T1, the partial winding U12 + has a larger number of turns than the partial winding V24−. In the following, in each of the teeth T1 to T18 provided with a plurality of partial windings, the partial winding having a large number of turns is simply referred to as a main winding, and the partial winding having a small number of turns is simply referred to as a slave winding. There is. In the teeth T1, the partial winding U12 + is the main winding, and the partial winding V24- is the slave winding.

The teeth T2 is provided with a main winding V25 + and a slave winding U13-. The teeth T3 is provided with a partial winding W14 + and a partial winding V26−. The number of turns of the partial winding W14 + provided on the teeth T3 is the same as the number of turns of the partial winding V26−. In the following, these partial windings are referred to as the same winding in order to distinguish them from the main winding and the slave winding. Hereinafter, each partial winding provided in the teeth T3 to T18 is as shown in FIGS. 2 and 4.

In each partial winding, the signs "+" and "-" indicate the direction of the current, that is, the polarity of the magnetomotive force (field) generated by the partial winding. For example, in FIG. 2 of the present embodiment, when the current flow from the front side to the back side of the paper is "+", the current flow from the back side to the front side is "-". That is, when a current flows through the stator winding 32, it means that a “+” partial winding and a “−” partial winding generate magnetomotive forces that are opposite in the radial direction. It can be said that the "+" partial winding and the "-" partial winding have a phase difference in magnetomotive force of 180 degrees in terms of electrical angle. The "+" partial winding and the "-" partial winding can be realized by reversing the winding method. Similarly, in the case of the coil body described later, the polarity of the magnetomotive force (field) generated by the coil body is shown.

In each teeth T1 to T18, two partial windings are arranged at different radial positions. The radial position of the partial winding does not have to be as shown in FIG. 2, and may be replaced.

Then, as shown in FIG. 4, the U-phase coil body Ua + is configured by providing the U-phase main winding U12 + and the V-phase slave winding V24- on the teeth T1. The method of constructing the coil body of each phase by combining the partial windings will be described later. Further, the teeth T10 is provided with the U-phase main winding U15− and the V-phase slave winding V21 +, thereby forming the U-phase coil body Ua−.

Further, since the teeth T14 is provided with the U-phase main winding U25 + and the W-phase slave winding W13-, the U-phase coil body Ub + is configured. The U-phase coil body Ub + is configured to have a predetermined phase difference with respect to the U-phase coil body Ua +. Further, the teeth T5 is provided with the U-phase main winding U22− and the W-phase slave winding W16 +, whereby the U-phase coil body Ub− is configured.

Further, the teeth T9 is provided with the U-phase same winding U14 + and the W-phase same winding W26-, so that the U-phase coil body Uc + is configured. The U-phase coil body Uc + is configured to have a predetermined phase difference with respect to the U-phase coil body Ua +. Further, the teeth T18 is provided with the U-phase same winding U11− and the W-phase same winding W23 +, whereby the U-phase coil body Uc− is configured.

In the present embodiment, when the U-phase coil bodies Ua +, Ua-, Ub +, Ub-, Uc +, and Uc- are used as the first phase coil bodies, the U phase corresponds to the first phase and the V phase corresponds to the second phase. It corresponds to the phase, and the W phase corresponds to the third phase. In this case, the teeth T1 and T10 correspond to the first teeth, the teeth T14 and T5 correspond to the second teeth, and the teeth T9 and T18 correspond to the third teeth.

Further, since the teeth T7 is provided with the V-phase main winding V12 + and the W-phase slave winding W24-, the V-phase coil body Va + is configured. The V-phase coil body Va + is configured to have a phase difference of 120 degrees with respect to the U-phase coil body Ua +. Further, the teeth T16 is provided with the V-phase main winding V15− and the W-phase slave winding W21 +, thereby forming the V-phase coil body Va−.

Further, since the teeth T2 is provided with the V-phase main winding V25 + and the U-phase slave winding U13-, the V-phase coil body Vb + is configured. The V-phase coil body Vb + is configured to have a phase difference of 120 degrees with respect to the U-phase coil body Ub +. Further, the teeth T11 is provided with the V-phase main winding V22− and the U-phase slave winding U16 +, whereby the V-phase coil body Vb− is configured.

Further, the teeth T15 is provided with the V-phase same winding V14 + and the U-phase same winding U26-, so that the V-phase coil body Vc + is configured. The V-phase coil body Vc + is configured to have a phase difference of 120 degrees with respect to the U-phase coil body Uc +. Further, the teeth T6 is provided with the V-phase same winding V11− and the U-phase same winding U23 +, whereby the V-phase coil body Vc− is configured.

In the present embodiment, when the V-phase coil bodies Va +, Va-, Vb +, Vb-, Vc +, and Vc- are used as the first phase coil bodies, the V phase corresponds to the first phase and the W phase corresponds to the second phase. It corresponds to the phase, and the U phase corresponds to the third phase. In this case, the teeth T7 and T16 correspond to the first teeth, the teeth T2 and T11 correspond to the second teeth, and the teeth T15 and T6 correspond to the third teeth.

Further, since the teeth T13 is provided with the W-phase main winding W12 + and the U-phase slave winding U24-, the W-phase coil body Wa + is configured. The W-phase coil body Wa + is configured to have a phase difference of 240 degrees with respect to the U-phase coil body Ua +. Further, the teeth T4 is provided with the W-phase main winding W15− and the U-phase slave winding U21 +, thereby forming the W-phase coil body Wa−.

Further, since the teeth T8 is provided with the W-phase main winding W25 + and the V-phase slave winding V13-, the W-phase coil body Wb + is configured. The W-phase coil body Wb + is configured to have a phase difference of 240 degrees with respect to the U-phase coil body Ub +. Further, since the teeth T17 is provided with the W-phase main winding W22− and the V-phase slave winding V16 +, the W-phase coil body Wb− is configured.

Further, the W-phase coil body Wc + is configured by providing the W-phase same winding W14 + and the V-phase same winding V26- on the teeth T3. The W-phase coil body Wc + is configured to have a phase difference of 240 degrees with respect to the U-phase coil body Uc +. Further, the teeth T12 is provided with the W-phase same winding W11− and the V-phase same winding V23 +, whereby the W-phase coil body Wc− is configured.

In the present embodiment, when the W-phase coil body Wa +, Wa-, Wb +, Wb-, Wc +, Wc- is used as the first phase coil body, the W phase corresponds to the first phase and the U phase corresponds to the second phase. It corresponds to the phase, and the V phase corresponds to the third phase. In this case, the teeth T13 and T4 correspond to the first teeth, the teeth T8 and T17 correspond to the second teeth, and the teeth T3 and T12 correspond to the third teeth.

As shown in FIG. 2, the coil bodies of each phase are arranged twice rotationally symmetrically with the axis of the rotating shaft 11 as the center. That is, even if the coil body is rotated by 180 degrees around the axis, the arrangement order of each coil body is the same.

By the way, when the coil body of 3 phases (U phase, V phase, W phase) is set by 3 systems (a, b, c) as described above, the 6th harmonic component "Tr6" of the torque in each phase is , Can be expressed by the mathematical formula (1). Further, the 12th harmonic component "Tr12" of the torque in each phase can be expressed by the mathematical formula (2).

In the equations (1) and (2), "θ" is the phase of the current flowing through the stator winding 32 (based on the phase of the U-phase current supplied from the inverter circuit 51). “Α” is a constant and depends on noise and the like. Further, in the first embodiment, the first term of the mathematical formulas (1) and (2) corresponds to the components based on the coil bodies Ua, Va, Wa (first system), and the second term corresponds to the coil body Ub, The third term corresponds to the component based on the coil bodies Uc, Vc, Wc (third system), and corresponds to the component based on Vb, Wb (second system).

Further, in the mathematical formulas (1) and (2), "Ta" is a constant proportional to the number of turns of the coil bodies Ua, Va, and Wa and the maximum value of the current. Further, "Tb" is a constant proportional to the number of turns of the coil bodies Ub, Vb, and Wb and the maximum value of the current. Further, "Tc" is a constant proportional to the number of turns of the coil bodies Uc, Vc, and Wc and the maximum value of the current.

Here, when "γ1" and "γ2" are "20 degrees" and "40 degrees" in electrical angle, respectively, and "Ta", "Tb", and "Tc" are the same, the mathematical formula ( As shown in 3), (4) and FIG. 6, it can be seen that each harmonic component of the torque is canceled.

Therefore, the phase difference "λ1" with the magnetomotive force of the coil bodies Ub, Vb, Wb with respect to the magnetomotive force of the coil bodies Ua, Va, Wa is set to 20 degrees, and the coil with respect to the magnetomotive force of the coil bodies Ua, Va, Wa. If the phase difference "λ2" of the magnetomotive forces of the bodies Uc, Vc, and Wc is set to 40 degrees, it can be said that the torque ripple can be suppressed.

Note that the phase difference "λ1" is 20 + 180n (n is an integer) degree, and similarly, the formula (3) becomes zero and the sixth harmonic component is cancelled. Similarly, the phase difference "λ2" is 40 + 180n (n is an integer) degree, and the equation (4) becomes zero, and the 12th harmonic component is cancelled. That is, even if the polarity of each coil body is reversed, it can be canceled in the same manner. Further, the phase difference "λ1" is preferably 20 + 180n (n is an integer) degree, but may be a value around it (for example, in the range of 15 to 25 degrees), and even in this case, the effect of suppressing torque ripple is obtained. be able to. The same applies to the phase difference “λ2”.

Therefore, in the present embodiment, each coil body is provided so that "λ1" and "λ2" have electric angles of "20 + 180n degrees" and "40 + 180n degrees", respectively, and the magnetomotive force is about the same. More specifically, in order to form each such coil body, the combination and the number of turns of each partial winding provided in each of the teeth T1 to T18 are set. Hereinafter, a specific description will be given.

As a premise here, since one inverter circuit 51 outputs a three-phase alternating current to the stator winding 32, the magnetomotive force of each partial winding is as shown in the following formulas (11) to (16). be. The magnetomotive force Fu1 of the U-phase partial windings U12 +, U14 +, U16 +, U21 +, U23 +, and U25 + is used. Further, the magnetomotive force Fu2 of the U-phase partial windings U11-, U13-, U15-, U22-, U24-, and U26-in which the polarities are reversed is used. Further, the magnetomotive force Fv1 of the V-phase partial windings V12 +, V14 +, V16 +, V21 +, V23 +, and V25 + is used. Further, the magnetomotive force Fv2 of the V-phase partial windings V11-, V13-, V15-, V22-, V24-, and V26-in which the polarities are reversed is used. Further, the magnetomotive force Fw1 of the W phase partial windings W12 +, W14 +, W16 +, W21 +, W23 +, and W25 + is used. Further, the magnetomotive force Fw2 of the W-phase partial windings W11-, W13-, W15-, W22-, W24-, and W26-in which the polarities are reversed is used. Further, "I" is a constant depending on the maximum value of the alternating current, and "N" is a constant depending on the number of turns of each partial winding.

First, a winding method for forming the U-phase coil body Ua + will be described. As shown in FIGS. 2 and 4, the teeth T1 are provided with a main winding U12 + and a slave winding V24−. The magnetomotive force Fu1 of the main winding U12 + and the magnetomotive force Fv2 of the slave winding V24- have a phase difference of 60 degrees as shown in the equations (11) and (15). More specifically, the slave winding V24− has a relationship of −60 degrees with respect to the phase of the main winding U12 +. Here, it was found that the total of the vector value obtained by multiplying the magnetomotive force Fu1 by 0.88 and the vector value obtained by multiplying the magnetomotive force Fv2 by 0.2 gives the formula (21) and FIG. 7 (a). There is.

Therefore, the number of turns "Na" of the main winding U12 + and the number of turns "Nb" of the slave winding V24- satisfy the above relationship, that is, Na: Nb = 0.88: 0.2, and , "Na" and "Nb" are set to be integers. In this embodiment, it is set so that Na: Nb = 9: 2. The number of turns may be set within the range of 3.0 ≦ Na / Nb ≦ 6.0. By adjusting the number of turns as described above, the main winding U12 + and the slave winding V24− form a U-phase coil body Ua + capable of generating a magnetomotive force Fua1.

Next, a winding method for forming the U-phase coil body Ub + will be described. As shown in FIGS. 2 and 4, the teeth T14 are provided with a main winding U25 + and a slave winding W13−. The magnetomotive force Fu1 of the main winding U25 + and the magnetomotive force Fw2 of the slave winding W13− have a phase difference of 60 degrees as shown in the equations (11) and (16). More specifically, the slave winding W13− has a relationship of +60 degrees with respect to the phase of the main winding U25 +. Here, it was found that the total of the vector value obtained by multiplying the magnetomotive force Fu1 by 0.88 and the vector value obtained by multiplying the magnetomotive force Fw2 by 0.2 gives the following equation (22) and FIG. 7 (b). There is.

Therefore, the number of turns "Na" of the main winding U25 + and the number of turns "Nb" of the slave winding W13- satisfy the above relationship, that is, Na: Nb = 0.88: 0.2, and , "Na" and "Nb" are set to be integers. In this embodiment, it is set so that Na: Nb = 9: 2. The number of turns may be set within the range of 3.0 ≦ Na / Nb ≦ 6.0.

Further, it is desirable that the magnetomotive force Fab1 has the same magnitude (amplitude) as the magnetomotive force Fua1 because it is necessary to balance the amplitude of the magnetomotive force of each coil body. Therefore, the number of turns "Na" of the main winding U25 + constituting the U-phase coil body Ub + is the same as the number of turns "Na" of the main winding U12 + constituting the U-phase coil body Ua +. Similarly, the number of turns "Nb" of the slave winding W13-that constitutes the U-phase coil body Ub + is the same as the number of turns "Nb" of the slave winding V24- that constitutes the U-phase coil body Ua +. ..

By adjusting the number of turns as described above, the main winding U25 + and the slave winding W13− form a U-phase coil body Ub + capable of generating a magnetomotive force Hub1. That is, a U-phase coil body Ub + having the same magnetomotive force as the coil body Ua + and having a phase difference “λ1” of 20 degrees with respect to the coil body Ua + is configured.

Next, the winding method for forming the U-phase coil body Uc + will be described. As shown in FIGS. 2 and 4, the teeth T9 are provided with the same winding U14 + and the same winding W26−. The magnetomotive force Fu1 of the winding U14 + and the magnetomotive force Fw2 of the winding W26− have a phase difference of 60 degrees as shown in the equations (11) and (16). More specifically, the winding W26− has a relationship of +60 degrees with respect to the phase of the winding U14 +.

Here, it was found that the total of the vector value obtained by multiplying the magnetomotive force Fu1 by 0.57 and the vector value obtained by multiplying the magnetomotive force Fw2 by 0.57 gives the formula (23) and FIG. 7 (c). There is. That is, by adjusting the number of turns, the same winding U14 + and the same winding W26− form a U-phase coil body + Uc in which the phase difference “λ2” is 40 degrees with respect to the coil body + Ua.

At this time, it is desirable that the magnetomotive force Fuc1 has the same magnitude (amplitude) as the magnetomotive force Fua1 in order to balance the amplitude of the magnetomotive force of each coil body. Therefore, the number of turns "Nc" of the winding U14 + and the winding W26- constituting the U-phase coil body Uc + is set to the number of turns "Na" of the main winding U12 + constituting the U-phase coil body Ua +. On the other hand, it is set so that it approaches Na: Nc = 0.88: 0.57 and both are integers.

In this embodiment, it is set so that Na: Nc = 9: 6. That is, the number of turns of each partial winding is set so that Na: Nb: Nc = 9: 2: 6. The number of turns may be set within the range of 1.4 ≦ Na / Nc ≦ 1.8. By adjusting the number of turns as described above, a U-phase coil body Uc + having the same magnetomotive force as the coil body Ua + and a phase difference “λ2” of 40 degrees with respect to the coil body Ua + is configured.

Similarly, after setting the number of turns of each partial winding so that Na: Nb: Nc = 9: 2: 6, for each teeth T1 to T18, according to FIGS. 2 and 4. Each partial winding is provided. As a result, the magnetomotive force Fua1 of the U-phase coil body Ua +, the magnetomotive force Fva1 of the V-phase coil body Va +, and the magnetomotive force Fwa1 of the W-phase coil body Wa + are shown in the equations (31) to (33). Can be configured. Further, the magnetomotive force Fua2 of the U-phase coil body Ua-, the magnetomotive force Fva2 of the V-phase coil body Va-, and the magnetomotive force Fwa2 of the W-phase coil body Wa- are shown in equations (34) to (36). Can be configured in. Note that "θ" is the phase of the current flowing through the stator winding 32 (based on the phase of the U-phase current supplied from the inverter circuit 51). Further, "I" is a constant depending on the maximum value of the alternating current, and "N" is the number of turns of the stator winding 32 wound around each of the teeth T1 to T18 (the number of turns of the partial winding). It is a constant that depends on the sum).

Similarly, the magnetomotive force Fub1 of the U-phase coil body Ub +, the magnetomotive force Fvb1 of the V-phase coil body Vb +, and the magnetomotive force Fwb1 of the W-phase coil body Wb + are shown in equations (37) to (39). Can be configured. Further, the magnetomotive force Fub2 of the U-phase coil body Ub-, the magnetomotive force Fvb2 of the V-phase coil body Vb-, and the magnetomotive force Fwb2 of the W-phase coil body Wb- are shown in equations (40) to (42). Can be configured in. “Λ1” is the phase difference of the magnetomotive force of the coil body Ub + with respect to the magnetomotive force of the coil body Ua +. That is, when the magnetomotive force of the coil body Ua + is used as a reference, the phase delay of the magnetomotive force of the coil body Ub + is shown. Similarly, “λ1” is the phase difference of the magnetomotive force of the coil body Vb + with respect to the magnetomotive force of the coil body Va +, and is the phase difference of the magnetomotive force of the coil body Wb + with respect to the magnetomotive force of the coil body Wa +. "Λ1" of this embodiment is "20" degrees.

Similarly, the magnetomotive force Fuc1 of the U-phase coil body Uc +, the magnetomotive force Fvc1 of the V-phase coil body Vc +, and the magnetomotive force Fwc1 of the W-phase coil body Wc + are shown in the equations (43) to (45). Can be configured. Further, the magnetomotive force Fuc2 of the U-phase coil body Uc-, the magnetomotive force Fvc2 of the V-phase coil body Vc-, and the magnetomotive force Fwc2 of the W-phase coil body Wc- are shown in mathematical formulas (46) to (48). Can be configured as follows.

"Λ2" is the phase difference of the magnetomotive force of the coil body Uc + with respect to the magnetomotive force of the coil body Ua +. That is, when the magnetomotive force of the coil body Ua + is used as a reference, the phase delay of the magnetomotive force of the coil body Uc + is shown. Similarly, “λ2” is the phase difference of the magnetomotive force of the coil body Vc + with respect to the magnetomotive force of the coil body Va +, and is the phase difference of the magnetomotive force of the coil body Wc + with respect to the magnetomotive force of the coil body Wa +. "Λ2" of this embodiment is "40" degrees.

As shown in the above formulas (31) to (48), "λ1" and "λ2" have electric angles of "20 degrees" and "40 degrees", respectively, and the magnetomotive forces are about the same. Each coil body Ua will be configured. In the figure, the column of the electric angle indicates the phase difference of the coil body of each phase when "θ" is used as a reference (zero). The same applies to the drawings in other embodiments.

As described above, according to the configuration of the first embodiment, it has the following effects.

The U-phase coil body Ua + is configured by providing the U-phase main winding U12 + and the V-phase slave winding V24- on the teeth T1 as the first teeth. Further, the U-phase coil body Ub + is configured by providing the U-phase main winding U25 + and the W-phase slave winding W13− on the teeth T14 as the second teeth. The U-phase coil body Uc + is configured by providing the U-phase same winding U14 + and the W-phase same winding W26- on the teeth T9 as the third tooth.

Then, in the teeth T9, the phase difference between the magnetomotive force Fu1 of the U14 + of the same winding of the U phase and the magnetomotive force Fw2 of the same winding W26- of the W phase is set to be 60 degrees in the electric angle. .. Further, in the teeth T1, the phase difference between the magnetomotive force Fu1 of the U-phase main winding U12 + and the magnetomotive force Fv2 of the V-phase slave winding V24- is set to be 60 degrees in terms of electrical angle. .. Further, in the teeth T14, the phase difference between the magnetomotive force Fu1 of the main winding U25 + of the U phase and the magnetomotive force Fw2 of the slave winding W13− of the W phase is set to be 60 degrees in terms of electric angle. ..

Further, when the number of turns of the U-phase main windings U12 + and U25 + is "Na" and the V-phase slave winding V24- and the W-phase slave winding W13-are "Nb", respectively, 3.0. The number of turns is set so as to satisfy the relationship of ≦ Na / Nb ≦ 6.0. More specifically, the number of turns is set so that Na: Nb = 9: 2. The V-phase coil body and the W-phase coil body are also set in the same manner.

Thereby, each phase difference "λ1" of the magnetomotive force of the coil bodies Ub, Vb, Wb with respect to the magnetomotive force of the coil bodies Ua, Va, Wa can be set to 20 + 180 n degrees. Further, the phase difference "λ2" of the magnetomotive forces of the coil bodies Uc, Vc, and Wc with respect to the magnetomotive force of the coil bodies Ua, Va, and Wa can be set to 40 + 180 n degrees. Then, as shown in FIG. 2, the coil bodies of each phase are arranged twice rotationally symmetrically with respect to the axial center of the rotating shaft 11. Therefore, as shown in the formulas (1) to (4), it is possible to cancel the 6th or 12th harmonic component of the torque and suppress the torque ripple.

The number of turns of each partial winding was set so that the magnetomotive force of each coil body was within a predetermined amplitude range (similar in this embodiment). Specifically, the number of turns of each winding is set so that the number of turns "Na" of the main winding and the number of turns "Nc" of the same winding satisfy the relationship of 1.4 ≤ Na / Nc ≤ 1.8. There is. Specifically, the number of turns is set so that Na: Nb: Nc = 9: 2: 6. As a result, the amplitude of the magnetomotive force of each coil body can be made to be about the same, and torque ripple can be suppressed.

The number of magnetic poles of the motor 10 was set to "14", and the number of slots 35 was set to "18". That is, the number of magnetic poles was (18 ± 4) × m (m is an integer of 1 or more), and the number of slots was 18 × m. As a result, the electromagnetic force can be balanced around the axis.

A detailed explanation will be given based on FIG. FIG. 8A is a diagram showing the relationship between the electromagnetic force generated by each of the teeth T1 to T18 and the mechanical angle of the motor 10. FIG. 8B shows the fluctuation of the electromagnetic force shown in FIG. 8A along the circumferential direction when the rotation axis 11 is centered.

As shown in FIG. 4, U-phase coil bodies Ua ±, Ub ±, and Uc ± are arranged at intervals of about 90 degrees. The same applies to the V-phase coil bodies Va ±, Vb ±, Vc ± and the W-phase coil bodies Wa ±, Wb ±, Wc ±. Therefore, as shown in FIG. 8, the balance of the electromagnetic force is improved. Therefore, the electromagnetic force is not biased somewhere, torque fluctuation can be suppressed, and vibration and noise can be suppressed.

Then, as shown in FIGS. 2 and 4, each of the same windings wound around the teeth T3, T6, T9, T12, T15, and T18 as the third tooth is wound around the tooth next to the third tooth. It is connected to the main winding. For example, the same winding W14 + of the teeth T3 is connected to the main winding W15- of the teeth T4, and the same winding V26-of the teeth T3 is connected to the main winding V25 + of the teeth T2. As a result, at the coil end, the crossover for connecting the slots 35 can be shortened, the connection can be facilitated, and the size can be reduced.

(Second Embodiment)
A part of the configuration of the first embodiment may be changed as follows. Hereinafter, only different parts will be described based on the configuration of the first embodiment.

In the second embodiment, as shown in FIGS. 9 and 10, the rotor 40 has 22 magnetic poles (that is, the number of magnetic pole pairs is 11). That is, it has 22 permanent magnets 42.

Further, in the second embodiment, the U-phase stator winding 32 has 12 partial windings U11-, U12 +, U13-, U14 +, U15-, U16 +, U21-, U22 +, U23-, U24 +, U25. -, It is composed of U26 +. These U-phase partial windings are connected in series. The V-phase stator winding 32 is composed of 12 partial windings V11 +, V12-, V13 +, V14-, V15 +, V16-, V21 +, V22-, V23 +, V24-, V25 +, V26-. .. These V-phase partial windings are connected in series. The W-phase stator winding 32 is composed of 12 partial windings W11 +, W12−, W13 +, W14−, W15 +, W16−, W21−, W22 +, W23−, W24 +, W25−, W26 +. .. These W-phase partial windings are connected in series.

One end of these series connectors is connected to the neutral point Q, and the other end is connected to leader lines A1, B1, and C1 connected to the inverter circuit 51, respectively. In the stator winding 32 of the present embodiment, Y connection (star connection) is used, but delta connection may be used.

Further, as shown in FIGS. 9 and 10, 36 partial windings are provided by winding the stator winding 32 around each of the teeth T1 to T18. In the second embodiment, when the U-phase coil body Ua +, Ua-, Ub +, Ub-, Uc +, Uc- is used as the first phase coil body, the U phase corresponds to the first phase and the V phase corresponds to the first phase. It corresponds to the second phase, and the W phase corresponds to the third phase. In this case, the teeth T1 and T10 correspond to the first teeth, the teeth T6 and T15 correspond to the second teeth, and the teeth T11 and T2 correspond to the third teeth.

Further, in the second embodiment, when the V-phase coil bodies Va +, Va-, Vb +, Vb-, Vc +, and Vc- are used as the first phase coil bodies, the V phase corresponds to the first phase and the W phase. Corresponds to the second phase, and the U phase corresponds to the third phase. In this case, the teeth T13 and T4 correspond to the first teeth, the teeth T18 and T9 correspond to the second teeth, and the teeth T5 and T14 correspond to the third teeth.

Further, in the second embodiment, when the W phase coil body Wa +, Wa−, Wb +, Wb−, Wc +, Wc− is used as the first phase coil body, the W phase corresponds to the first phase and the U phase. Corresponds to the second phase, and the V phase corresponds to the third phase. In this case, the teeth T7 and T16 correspond to the first teeth, the teeth T12 and T3 correspond to the second teeth, and the teeth T17 and T8 correspond to the third teeth.

Further, as shown in FIG. 10, the coil bodies of each phase are arranged twice rotationally symmetrically with the axis of the rotating shaft 11 as the center.

The phase difference between the magnetomotive force Fu1 of the U-phase same winding U16 + provided in the third tooth T11 and the magnetomotive force Fw2 of the W-phase same winding W21- provided in the teeth T11 is the electric angle. It becomes 60 degrees. Further, the phase difference between the magnetomotive force Fu1 of the U-phase main winding U12 + provided in the first teeth T1 and the magnetomotive force Fv2 of the V-phase slave winding V26- provided in the teeth T1 is the electric angle. It becomes 60 degrees. Further, the phase difference between the magnetomotive force Fu1 of the U-phase main winding U22 + provided in the second teeth T6 and the magnetomotive force Fw2 of the W-phase slave winding W14- provided in the teeth T6 is the electric angle. It becomes 60 degrees.

Further, the number of turns of the U-phase main winding U12 + and the U-phase main winding U22 + is set to "Na", and the V-phase slave winding V26- and the W-phase slave winding W14-are set to "Nb", respectively. If so, the number of turns is set so as to satisfy the relationship of 3.0 ≦ Na / Nb ≦ 6.0. More specifically, the number of turns is set so that Na: Nb = 9: 2.

Further, the number of turns of each winding is set so that the number of turns of the main winding "Na" and the number of turns of the same winding "Nc" satisfy the relationship of 1.4 ≤ Na / Nc ≤ 1.8. Specifically, the number of turns is set so that Na: Nb: Nc = 9: 2: 6.

And the V-phase coil body and the W-phase coil body are also set in the same manner. Further, each coil body having a different polarity is also set in the same manner.

Thereby, each phase difference "λ1" of the magnetomotive force of the coil bodies Ub, Vb, Wb with respect to the magnetomotive force of the coil bodies Ua, Va, Wa can be set to 20 + 180 n degrees. Further, the phase difference "λ2" of the magnetomotive forces of the coil bodies Uc, Vc, and Wc with respect to the magnetomotive force of the coil bodies Ua, Va, and Wa can be set to 40 + 180 n degrees.

Therefore, as in the first embodiment, as shown in the formulas (1) to (4), it is possible to cancel the 6th or 12th harmonic component of the torque and suppress the torque ripple. Further, the amplitudes of the magnetomotive forces of the coil bodies Ua ± to Uc ±, Va ± to Vc ±, and Wa ± to Wc ± can be made similar. As a result, torque ripple can be suppressed more effectively. Further, according to the second embodiment, the same effect as that of the first embodiment can be obtained.

(Third Embodiment)
A part of the configuration of the first embodiment may be changed as follows. Hereinafter, only different parts will be described based on the configuration of the first embodiment.

In the third embodiment, as shown in FIGS. 11 and 12, the rotor 40 has 16 magnetic poles (that is, the number of magnetic pole pairs is 8). That is, it has 16 permanent magnets 42.

Further, in the third embodiment, the U-phase stator winding 32 has 12 partial windings U11 +, U12−, U13 +, U14 +, U15−, U16 +, U21−, U22 +, U23−, U24−, U25 +. , U26-. These U-phase partial windings are connected in series. The V-phase stator winding 32 is composed of 12 partial windings V11 +, V12−, V13 +, V14 +, V15−, V16 +, V21−, V22 +, V23−, V24−, V25 +, V26−. .. These V-phase partial windings are connected in series. The W-phase stator winding 32 is composed of 12 partial windings W11 +, W12−, W13 +, W14 +, W15−, W16 +, W21−, W22 +, W23−, W24−, W25 +, W26−. .. These W-phase partial windings are connected in series.

One end of these series connectors is connected to the neutral point Q, and the other end is connected to leader lines A1, B1, and C1 connected to the inverter circuit 51, respectively. In the stator winding 32 of the present embodiment, Y connection (star connection) is used, but delta connection may be used.

Further, 36 partial windings are provided for each teeth T1 to T18 as shown in FIGS. 11 and 12. In the third embodiment, when the U-phase coil bodies Ua +, Ub-, and Uc + are the first-phase coil bodies, the U phase corresponds to the first phase, the V phase corresponds to the second phase, and the W phase. Corresponds to the third phase. In this case, the teeth T1 and T10 correspond to the first teeth, the teeth T9 and T18 correspond to the second teeth, and the teeth T8 and T17 correspond to the third teeth.

Further, in the third embodiment, when the V-phase coil bodies Va +, Vb-, and Vc + are used as the first-phase coil bodies, the V-phase corresponds to the first phase and the W-phase corresponds to the second phase. The U phase corresponds to the third phase. In this case, the teeth T4 and T13 correspond to the first teeth, the teeth T3 and T12 correspond to the second teeth, and the teeth T2 and T11 correspond to the third teeth.

Further, in the third embodiment, when the W phase coil bodies Wa +, Wb−, and Wc + are used as the first phase coil bodies, the W phase corresponds to the first phase and the U phase corresponds to the second phase. The V phase corresponds to the third phase. In this case, the teeth T7 and T16 correspond to the first teeth, the teeth T6 and T15 correspond to the second teeth, and the teeth T5 and T14 correspond to the third teeth.

Further, as shown in FIGS. 11 and 12, the coil bodies of each phase are arranged twice rotationally symmetrically with respect to the axis of the rotating shaft 11.

Then, in the teeth T17 and T8 which are the third teeth, the phase difference between the magnetomotive force Fu1 of the same winding U22 + and U25 + of the U phase and the magnetomotive force Fw2 of the same winding W12- and W15- of the W phase is, respectively. The electric angle is 60 degrees. Further, in the first teeth T1 and T10, the phase difference between the magnetomotive force Fu1 of the U-phase main windings U12 + and U14 + and the magnetomotive force Fv2 of the V-phase slave windings V21- and V24-is, respectively. The electric angle is 60 degrees. Further, in the teeth T9 and T18 which are the second teeth, the phase difference between the magnetomotive force Fu2 of the main windings U26- and U23- of the U phase and the magnetomotive force Fw1 of the slave windings W16 + and W13 + of the W phase is different, respectively. The electric angle is 60 degrees.

Further, the number of turns of the U-phase main windings U12 +, U14 +, U26-, and U23- is set to "Na", respectively, and the V-phase slave windings V21-, V24-, and the W-phase slave windings W16 + and W13 +, respectively. When "Nb" is set, the number of turns is set so as to satisfy the relationship of 3.0≤Na / Nb≤6.0. More specifically, the number of turns is set so that Na: Nb = 9: 2.

Further, the number of turns of each winding is set so that the number of turns of the main winding "Na" and the number of turns of the same winding "Nc" satisfy the relationship of 1.4 ≤ Na / Nc ≤ 1.8. Specifically, the number of turns is set so that Na: Nb: Nc = 9: 2: 6. The V-phase coil body and the W-phase coil body are also set in the same manner.

Thereby, each phase difference "λ1" of the magnetomotive force of the coil bodies Ub, Vb, Wb with respect to the magnetomotive force of the coil bodies Ua, Va, Wa can be set to 20 + 180 n degrees. Further, the phase difference "λ2" of the magnetomotive forces of the coil bodies Uc, Vc, and Wc with respect to the magnetomotive force of the coil bodies Ua, Va, and Wa can be set to 40 + 180 n degrees.

Therefore, as in the first embodiment, as shown in the formulas (1) to (4), it is possible to cancel the 6th or 12th harmonic component of the torque and suppress the torque ripple. Further, the amplitude of the magnetomotive force of each coil body can be made to be about the same. As a result, torque ripple can be suppressed more effectively.

As shown in FIGS. 11 and 12, each of the same windings wound around the teeth T2, T5, T8, T11, T14, T16 as the third tooth is attached to the tooth arranged next to the third tooth. It is connected to the main winding that is wound. For example, the same winding U12-of the teeth T2 is connected to the main winding U11 + of the teeth T1, and the same winding V22 + of the teeth T2 is connected to the main winding V23- of the teeth T3. As a result, at the coil end, the crossover for connecting the slots 35 can be shortened, the connection can be facilitated, and the size can be reduced.

(Fourth Embodiment)
A part of the configuration of the first embodiment may be changed as follows. Hereinafter, only different parts will be described based on the configuration of the first embodiment.

In the fourth embodiment, as shown in FIGS. 13 and 14, the rotor 40 has 20 magnetic poles (that is, the number of magnetic pole pairs is 10). That is, it has 20 permanent magnets 42.

In the fourth embodiment, the U-phase stator winding 32 has twelve partial windings U11 +, U12-, U13 +, U14 +, U15-, U16 +, U21-, U22 +, U23-, U24-, U25 +, U26. -Consists of. These U-phase partial windings are connected in series. The V-phase stator winding 32 is composed of 12 partial windings V11 +, V12-, V13 +, V14 +, V15-, V16 +, V21-, V22 +, V23-, V24-, V25 +, V26-. .. These V-phase partial windings are connected in series. The W-phase stator winding 32 is composed of 12 partial windings W11 +, W12−, W13 +, W14 +, W15−, W16 +, W21−, W22 +, W23−, W24−, W25 +, W26−. .. These W-phase partial windings are connected in series.

One end of these series connectors is connected to the neutral point Q, and the other end is connected to leader lines A1, B1, and C1 connected to the inverter circuit 51, respectively. In the stator winding 32 of the present embodiment, Y connection (star connection) is used, but delta connection may be used.

Further, as shown in FIGS. 13 and 14, 36 partial windings are wound around each tooth T1 to T18. In the fourth embodiment, when the U-phase coil bodies Ua +, Ub-, and Uc + are the first-phase coil bodies, the U phase corresponds to the first phase, the V phase corresponds to the second phase, and the W phase. Corresponds to the third phase. In this case, the teeth T1 and T10 correspond to the first teeth, the teeth T2 and T11 correspond to the second teeth, and the teeth T3 and T12 correspond to the third teeth.

Further, in the fourth embodiment, when the V-phase coil bodies Va +, Vb-, and Vc + are used as the first-phase coil bodies, the V-phase corresponds to the first phase and the W-phase corresponds to the second phase. The U phase corresponds to the third phase. In this case, the teeth T7 and T16 correspond to the first teeth, the teeth T8 and T17 correspond to the second teeth, and the teeth T9 and T18 correspond to the third teeth.

Further, in the fourth embodiment, when the W phase coil bodies Wa +, Wb−, and Wc + are used as the first phase coil bodies, the W phase corresponds to the first phase and the U phase corresponds to the second phase. The V phase corresponds to the third phase. In this case, the teeth T4 and T13 correspond to the first teeth, the teeth T5 and T14 correspond to the second teeth, and the teeth T6 and T15 correspond to the third teeth.

Further, as shown in FIGS. 13 and 14, the coil bodies of each phase are arranged twice rotationally symmetrically with respect to the axis of the rotating shaft 11.

Then, in the teeth T3 and T12 which are the third teeth, the phase difference between the magnetomotive force Fu1 of the same winding U25 + and U22 + of the U phase and the magnetomotive force Fw2 of the same winding W12- and W15- of the W phase is, respectively. The electric angle is 60 degrees. Further, in the first teeth T1 and T10, the phase difference between the magnetomotive force Fu1 of the main windings U13 + and U16 + of the U phase and the magnetomotive force Fv2 of the slave windings V23- and V26- of the V phase is different, respectively. The electric angle is 60 degrees. Further, in the teeth T2 and T11 which are the second teeth, the phase difference between the magnetomotive force Fu2 of the main windings U24- and U21- of the U phase and the magnetomotive force Fw1 of the slave windings W14 + and W11 + of the W phase is electric. The angle is 60 degrees.

Further, the number of turns of the U-phase main windings U13 +, U16 +, U24-, and U21- is set to "Na", respectively, and the V-phase slave windings V23-, V26-, and the W-phase slave windings W14 + and W11 +, respectively. When "Nb" is set, the number of turns is set so as to satisfy the relationship of 3.0≤Na / Nb≤6.0. More specifically, the number of turns is set so that Na: Nb = 9: 2.

Further, the number of turns of each winding is set so that the number of turns of the main winding "Na" and the number of turns of the same winding "Nc" satisfy the relationship of 1.4 ≤ Na / Nc ≤ 1.8. Specifically, the number of turns is set so that Na: Nb: Nc = 9: 2: 6. The V-phase coil body and the W-phase coil body are also set in the same manner.

Thereby, each phase difference "λ1" of the magnetomotive force of the coil bodies Ub, Vb, Wb with respect to the magnetomotive force of the coil bodies Ua, Va, Wa can be set to 20 + 180 n degrees. Further, the phase difference "λ2" of the magnetomotive forces of the coil bodies Uc, Vc, and Wc with respect to the magnetomotive force of the coil bodies Ua, Va, and Wa can be set to 40 + 180 n degrees.

Therefore, as in the first embodiment, as shown in the formulas (1) to (4), it is possible to cancel the 6th or 12th harmonic component of the torque and suppress the torque ripple. Further, the amplitude of the magnetomotive force of each coil body can be made to be about the same. As a result, torque ripple can be suppressed more effectively.

As shown in FIGS. 13 and 14, each of the same windings wound around the teeth T3, T6, T9, T12, T15, and T18 as the third tooth is attached to the tooth arranged next to the third tooth. It is connected to the main winding that is wound. For example, the same winding W15-of the teeth T3 is connected to the main winding W16 + of the teeth T4, and the same winding U25 + of the teeth T3 is connected to the main winding U24- of the teeth T2. As a result, at the coil end, the crossover for connecting the slots 35 can be shortened, the connection can be facilitated, and the size can be reduced.

(Fifth Embodiment)
A part of the configuration of the first embodiment may be changed as follows. Hereinafter, only different parts will be described based on the configuration of the first embodiment.

As shown in FIGS. 15 and 16, in the fifth embodiment, the U-phase stator winding 32 has 10 partial windings U11−, U12 +, U13−, U14 +, U15−, U16 +, U21−,. It is composed of U22 +, U23 +, and U24-. These U-phase partial windings are connected in series. The V-phase stator winding 32 is composed of 10 partial windings V11 +, V12−, V13 +, V14−, V15 +, V16−, V21 +, V22−, V23−, V24 +. These V-phase partial windings are connected in series. The W-phase stator winding 32 is composed of 10 partial windings W11−, W12 +, W13−, W14 +, W15−, W16 +, W21 +, W22−, W23−, W24 +. These W-phase partial windings are connected in series.

One end of these series connectors is connected to the neutral point Q, and the other end is connected to leader lines A1, B1, and C1 connected to the inverter circuit 51, respectively. In the stator winding 32 of the present embodiment, Y connection (star connection) is used, but delta connection may be used.

Further, 30 partial windings are provided in each teeth T1 to T18 as shown in FIGS. 15 and 16. For example, the teeth T1 is provided with only the partial winding U12 +. Hereinafter, when only one phase partial winding is provided for one teeth T1 to T18, the partial winding may be referred to as a single winding. Further, the main winding V21 + is wound around the teeth T2, and the slave winding U13- is wound around the teeth T2. Hereinafter, the partial windings provided in the teeth T3 to T18 are as shown in FIGS. 15 and 16.

Then, since the teeth T1 is provided with the U-phase single winding U12 +, the U-phase coil body Ua + is configured. Further, since the teeth T10 is provided with the U-phase single winding U15-, the U-phase coil body Ua- is configured.

Further, since the teeth T14 is provided with the U-phase main winding U23 + and the W-phase slave winding W13-, the U-phase coil body Ub + is configured. Further, the teeth T5 is provided with the U-phase main winding U21− and the W-phase slave winding W16 +, whereby the U-phase coil body Ub− is configured.

Further, since the teeth T9 is provided with the W-phase main winding W22- and the U-phase slave winding U14 +, the U-phase coil body Uc + is configured. Further, since the teeth T18 is provided with the W-phase main winding W24 + and the U-phase slave winding U11-, the U-phase coil body Uc- is configured.

In the present embodiment, when the U-phase coil bodies Ua +, Ua-, Ub +, Ub-, Uc +, and Uc- are used as the first phase coil bodies, the U phase corresponds to the first phase and the W phase corresponds to the second phase. Corresponds to the phase. In this case, the teeth T1 and T10 correspond to the first teeth, the teeth T14 and T5 correspond to the second teeth, and the teeth T9 and T18 correspond to the third teeth.

Further, since the teeth T7 is provided with the V-phase single winding V15 +, the V-phase coil body Va + is configured. Further, since the teeth T16 is provided with the V-phase single winding V12-, the V-phase coil body Va- is configured.

Further, since the teeth T2 is provided with the V-phase main winding V21 + and the U-phase slave winding U13-, the V-phase coil body Vb + is configured. Further, since the teeth T11 is provided with the V-phase main winding V23- and the U-phase slave winding U16 +, the V-phase coil body Vb- is configured.

Further, the teeth T15 is provided with the U-phase main winding U24- and the V-phase slave winding V11 +, so that the V-phase coil body Vc + is configured. Further, since the teeth T6 is provided with the U-phase main winding U22 + and the V-phase slave winding V14-, the V-phase coil body Vc- is configured.

In the present embodiment, when the V-phase coil bodies Va +, Va-, Vb +, Vb-, Vc +, and Vc- are used as the first phase coil bodies, the V phase corresponds to the first phase and the U phase corresponds to the second phase. Corresponds to the phase. In this case, the teeth T7 and T16 correspond to the first teeth, the teeth T2 and T11 correspond to the second teeth, and the teeth T15 and T6 correspond to the third teeth.

Further, since the teeth T13 is provided with the W-phase single winding W12 +, the W-phase coil body Wa + is configured. Further, since the teeth T4 is provided with the W-phase single winding W15-, the W-phase coil body Wa- is configured.

Further, since the teeth T8 is provided with the W-phase main winding W21 + and the V-phase slave winding V16-, the W-phase coil body Wb + is configured. Further, the teeth T17 is provided with the W-phase main winding W23− and the V-phase slave winding V13 +, whereby the W-phase coil body Wb− is configured.

Further, since the teeth T3 is provided with the V-phase main winding V22- and the W-phase slave winding W14 +, the W-phase coil body Wc + is configured. Further, since the teeth T12 is provided with the V-phase main winding V24 + and the W-phase slave winding W11−, the W-phase coil body Wc− is configured.

In the present embodiment, when the W-phase coil body Wa +, Wa-, Wb +, Wb-, Wc +, Wc- is used as the first phase coil body, the W phase corresponds to the first phase and the V phase corresponds to the second phase. Corresponds to the phase. In this case, the teeth T13 and T4 correspond to the first teeth, the teeth T8 and T17 correspond to the second teeth, and the teeth T3 and T12 correspond to the third teeth.

As shown in FIG. 16, the coil bodies of each phase are arranged twice rotationally symmetrically with the axis of the rotating shaft 11 as the center. That is, even if the coil body is rotated by 180 degrees around the axis, the order of arrangement of the coils is the same.

Next, the combination of the partial windings wound around the teeth T1 to T18 and the number of windings in the fifth embodiment will be described.

First, the winding method for forming the U-phase coil body Ua + will be described. As shown in FIGS. 15 and 16, the teeth T1 are provided with a single winding U12 +. The magnetomotive force Fu1 of the single winding U12 + is as shown in the mathematical formula (11). Then, in the fifth embodiment, the magnetomotive force Fu1 of the single winding U12 + corresponds to the magnetomotive force Fu1 of the U-phase coil body Ua +, as shown in FIG. 17 (a).

Next, a winding method for forming the U-phase coil body Ub + will be described. As shown in FIGS. 15 and 16, the teeth T14 are provided with a main winding U23 + and a slave winding W13−. The magnetomotive force Fu1 of the main winding U23 + and the magnetomotive force Fw2 of the slave winding W13− have a phase difference of 60 degrees as shown in the equations (11) and (16). More specifically, the phase of the slave winding W13− has a relationship of +60 degrees with respect to the phase of the main winding U23 +. Here, it was found that the total of the vector value obtained by multiplying the magnetomotive force Fu1 by 0.74 and the vector value obtained by multiplying the magnetomotive force Fw2 by 0.39 gives the formula (51) and FIG. 17 (b). There is.

Therefore, the number of turns "Nd" of the main winding U23 + and the number of turns "Ne" of the slave winding W13- satisfy the above relationship, that is, Nd: Ne = 0.74: 0.39, and , "Nd" and "Ne" are set to be integers. In this embodiment, it is set so that Na: Nb = 11: 6. The number of turns may be set within the range of 1.8 ≦ Nd / Ne ≦ 2.0.

Further, it is desirable that the magnetomotive force Fab1 has the same magnitude (amplitude) as the magnetomotive force Fua1 because it is necessary to balance the amplitude of the magnetomotive force of each coil body. Therefore, when the number of turns of the single winding U12 + constituting the U-phase coil body Ua + is set to "Nf", the number of turns is set so as to satisfy the relationship of 1.2≤Nf / Nd≤1.5. There is. Specifically, the number of turns is set so that Nd: Ne: Nf = 11: 6: 15.

By adjusting the number of turns as described above, a U-phase coil body Ub + having the same magnetomotive force of the coil body Ua + and a phase difference "λ1" of 20 degrees with respect to the coil body Ua + is configured.

Next, the winding method for forming the U-phase coil body Uc + will be described. As shown in FIGS. 15 and 16, the teeth T9 are provided with a main winding W22− and a slave winding U14 +. The magnetomotive force Fw2 of the main winding W22- and the magnetomotive force Fu1 of the slave winding U14 + have a phase difference of 60 degrees as shown in the equations (11) and (16). More specifically, the phase of the main winding W22− has a relationship of +60 degrees with respect to the phase of the slave winding U14 +. Here, it was found that the total of the vector value obtained by multiplying the magnetomotive force Fw2 by 0.74 and the vector value obtained by multiplying the magnetomotive force Fu1 by 0.39 gives the formula (52) and FIG. 17 (c). There is.

Therefore, the number of turns "Nd" of the main winding W22- and the number of turns "Ne" of the slave winding U14 + satisfy the above relationship, that is, Nd: Ne = 0.74: 0.39, and , "Nd" and "Ne" are set to be integers. In this embodiment, Nf: Ne = 11: 6 is set. The number of turns may be set within the range of 1.8 ≦ Nd / Ne ≦ 2.0.

Further, it is desirable that the magnetomotive force Fuc1 has the same magnitude (amplitude) as the magnetomotive force Fua1 because it is necessary to balance the amplitude of the magnetomotive force. Therefore, when the number of turns of the single winding U12 + constituting the U-phase coil body Ua + is set to "Nf", the number of turns is set so as to satisfy the relationship of 1.2≤Nf / Nd≤1.5. There is. Specifically, the number of turns is set so that Nd: Ne: Nf = 11: 6: 15.

By adjusting the number of turns as described above, a U-phase coil body Uc + having the same magnetomotive force of the coil body Ua + and a phase difference "λ2" of 40 degrees with respect to the coil body Ua + is configured.

Similarly, after setting the number of turns of each partial winding so that Nd: Ne: Nf = 11: 6: 15, for each teeth T1 to T18, according to FIGS. 15 and 16. Each partial winding is provided. As a result, the magnetomotive force Fua1 of the U-phase coil body Ua +, the magnetomotive force Fva1 of the V-phase coil body Va +, and the magnetomotive force Fwa1 of the W-phase coil body Wa + are shown in the equations (61) to (63). Can be configured. Further, the magnetomotive force Fua2 of the U-phase coil body Ua-, the magnetomotive force Fva2 of the V-phase coil body Va-, and the magnetomotive force Fwa2 of the W-phase coil body Wa- are shown in equations (64) to (66). Can be configured in.

Similarly, the magnetomotive force Fub1 of the U-phase coil body Ub +, the magnetomotive force Fvb1 of the V-phase coil body Vb +, and the magnetomotive force Fwb1 of the W-phase coil body Wb + are shown in equations (67) to (69). Can be configured. Further, the magnetomotive force Fub2 of the U-phase coil body Ub-, the magnetomotive force Fvb2 of the V-phase coil body Vb-, and the magnetomotive force Fwb2 of the W-phase coil body Wb- are shown in the equations (70) to (72). Can be configured in. "Λ1" of this embodiment is "20" degrees.

Similarly, the magnetomotive force Fuc1 of the U-phase coil body Uc +, the magnetomotive force Fvc1 of the V-phase coil body Vc +, and the magnetomotive force Fwc1 of the W-phase coil body Wc + are shown in equations (73) to (75). Can be configured. Further, the magnetomotive force Fuc2 of the U-phase coil body Uc-, the magnetomotive force Fvc2 of the V-phase coil body Vc-, and the magnetomotive force Fwc2 of the W-phase coil body Wc- are shown in equations (76) to (78). Can be configured as follows. "Λ2" of this embodiment is "40" degrees.

As shown in the above formulas (61) to (78), "λ1" and "λ2" have electric angles of "20 degrees" and "40 degrees", respectively, and the magnetomotive forces are about the same. Each coil body will be provided.

As described above, according to the configuration of the fifth embodiment, it has the following effects.

The teeth T1 as the first teeth are provided with a U-phase coil body Ua + by winding a U-phase single winding U12 +. Further, the U-phase coil body Ub + is provided on the teeth T14 as the second teeth by winding the U-phase main winding U23 + and winding the W-phase slave winding W13-. Be done. A U-phase coil body Uc + is provided in the teeth T9 as the third tooth by winding the main winding W22- of the W phase and winding the slave winding 14+ of the U phase.

The phase difference between the magnetomotive force Fu1 of the U-phase main winding U23 + provided in the teeth T14 and the magnetomotive force Fw2 of the W-phase slave winding W13- provided in the teeth T14 is 60 degrees in terms of electrical angle. Is set to. Further, the phase difference between the magnetomotive force Fw2 of the main winding W22- of the W phase provided in the teeth T9 and the magnetomotive force Fu1 of the slave winding 14+ of the U phase provided in the teeth T9 is 60 degrees in terms of electric angle. Is set to.

Further, when the number of turns of the main winding U23 + and the main winding W22-is set to "Nd" and the slave winding W13- and the slave winding 14+ are set to "Ne", respectively, 1.8 ≦ Nd / Nf ≦ 2. The number of turns is set so as to satisfy the relationship of 0.0. More specifically, the number of turns is set so that Nd: Nf = 11: 6.

And the V-phase coil body and the W-phase coil body are also set in the same manner. Further, each coil body + having different polarities is also set in the same manner.

Thereby, each phase difference "λ1" of the magnetomotive force of the coil bodies Ub, Vb, Wb with respect to the magnetomotive force of the coil bodies Ua, Va, Wa can be set to 20 + 180 n degrees. Further, the phase difference "λ2" of the magnetomotive forces of the coil bodies Uc, Vc, and Wc with respect to the magnetomotive force of the coil bodies Ua, Va, and Wa can be set to 40 + 180 n degrees. Then, as shown in FIG. 16, the coil bodies of each phase are arranged twice rotationally symmetrically with respect to the axial center of the rotating shaft 11. Therefore, as shown in the formulas (1) to (4), it is possible to cancel the 6th or 12th harmonic component of the torque and suppress the torque ripple.

The number of turns of each partial winding was set so that the magnetomotive force of each coil body was within a predetermined amplitude range (similar in this embodiment). Specifically, each winding count is set so that the relationship between the winding count “Nf” of the single winding and the winding count “Nd” of the main winding satisfies the relationship of 1.2 ≦ Nf / Nd ≦ 1.5. There is. Specifically, the number of turns is set so that Nd: Ne: Nf = 11: 6: 15. As a result, the amplitude of the magnetomotive force of the coil body can be made to the same level, and torque ripple can be suppressed.

The number of magnetic poles of the motor 10 was set to "14", and the number of slots 35 was set to "18". That is, the number of magnetic poles was (18 ± 4) × m (m is an integer of 1 or more), and the number of slots was 18 × m. Thereby, in the first embodiment, the electromagnetic force can be balanced around the axis.

As shown in FIGS. 15 and 16, each single winding wound around the teeth T1, T4, T7, T10, T13, T16 as the third tooth is attached to the tooth arranged next to the third tooth. It is connected to the slave winding that is wound. For example, the single winding U12 + of the teeth T1 is connected to the slave winding U11- of the teeth T18 and the slave winding U13-of the teeth T2. Further, in adjacent teeth, the main windings are connected to each other. For example, the main winding V21 + of the teeth T2 is connected to the main winding V22- of the teeth T3. As a result, at the coil end, the crossover for connecting the slots 35 can be shortened, the connection can be facilitated, and the size can be reduced.

(Sixth Embodiment)
A part of the configuration of the fifth embodiment may be changed as follows. Hereinafter, only different parts will be described based on the configuration of the fifth embodiment.

In the sixth embodiment, as shown in FIGS. 18 and 19, the rotor 40 has 22 magnetic poles (that is, the number of magnetic pole pairs is 11). That is, it has 22 permanent magnets 42.

As shown in FIGS. 18 and 19, in the sixth embodiment, the stator winding 32 of each phase is composed of 10 partial windings. The partial windings of each phase are connected in series. One end of these series connectors is connected to the neutral point Q, and the other end is connected to leader wires A1, B1, and C1 connected to the inverter circuit 51, respectively. In the stator winding 32 of the present embodiment, Y connection (star connection) is used, but delta connection may be used.

Further, 30 partial windings are provided in each teeth T1 to T18 as shown in FIGS. 18 and 19. In the present embodiment, when the U-phase coil bodies Ua +, Ua-, Ub +, Ub-, Uc +, and Uc- are used as the first phase coil bodies, the U phase corresponds to the first phase and the W phase corresponds to the second phase. Corresponds to the phase. In this case, the teeth T1 and T10 correspond to the first teeth, the teeth T6 and T15 correspond to the second teeth, and the teeth T2 and T11 correspond to the third teeth.

Further, in the present embodiment, when the V-phase coil bodies Va +, Va-, Vb +, Vb-, Vc +, and Vc- are used as the first phase coil bodies, the V phase corresponds to the first phase and the U phase is the first phase. Corresponds to the second phase. In this case, the teeth T4 and T13 correspond to the first teeth, the teeth T9 and T18 correspond to the second teeth, and the teeth T5 and T14 correspond to the third teeth.

Further, in the present embodiment, when the W-phase coil bodies Wa +, Wa-, Wb +, Wb-, Wc +, and Wc- are used as the first phase coil bodies, the W phase corresponds to the first phase and the V phase is the first phase. Corresponds to the second phase. In this case, the teeth T7 and T16 correspond to the first teeth, the teeth T3 and T12 correspond to the second teeth, and the teeth T8 and T17 correspond to the third teeth.

As shown in FIG. 19, the coil bodies of each phase are arranged twice rotationally symmetrically with the axis of the rotating shaft 11 as the center. That is, even if the coil body is rotated by 180 degrees around the axis, the order of arrangement of the coils is the same.

With the above configuration, the second tooth T6 is provided with a main winding U22 + and a slave winding W11-, and the magnetomotive force of the main winding U22 + and the magnetomotive force of the slave winding W11- The phase difference with and from is 60 degrees in terms of electrical angle. Further, the teeth T11, which is the third tooth, is provided with the main winding W21- and the slave winding U16 +, and the phase difference between the magnetomotive force of the main winding W21- and the magnetomotive force of the slave winding U16 + is an electric angle. It becomes 60 degrees.

The number of turns of the main winding "Nd" and the number of turns of the slave winding "Ne" approach Nd: Ne = 0.74: 0.39, and "Nd" and "Ne" are integers. The number of turns is set so as to be. In this embodiment, Nd: Ne = 11: 6 is set. The number of turns may be set within the range of 1.8 ≦ Nd / Ne ≦ 2.0.

Further, when the number of turns of a single winding is "Nf", the number of turns of each is set so as to satisfy the relationship of 1.2 ≦ Nf / Nd ≦ 1.5. Specifically, the number of turns is set so that Nd: Ne: Nf = 11: 6: 15.

By combining the main winding and the slave winding as described above and adjusting the number of turns, the magnetomotive force of the coil body Ua + is the same by the same reasoning as in the fifth embodiment, and the position is higher than that of the coil body Ua +. A U-phase coil body Ub + having a phase difference “λ1” of 20 degrees is configured. Further, a U-phase coil body Uc + having the same magnetomotive force of the coil body Ua + and having a phase difference “λ2” of 40 degrees with respect to the coil body Ua + is configured. The V-phase coil body and the W-phase coil body are also set in the same manner. Further, each coil body having a different polarity is also set in the same manner.

Thereby, each phase difference "λ1" of the magnetomotive force of the coil bodies Ub, Vb, Wb with respect to the magnetomotive force of the coil bodies Ua, Va, Wa can be set to 20 + 180 n degrees. Further, the phase difference "λ2" of the magnetomotive forces of the coil bodies Uc, Vc, and Wc with respect to the magnetomotive force of the coil bodies Ua, Va, and Wa can be set to 40 + 180 n degrees. Therefore, the same effect as that of the fifth embodiment can be obtained.

(7th Embodiment)
A part of the configuration of the fifth embodiment may be changed as follows. Hereinafter, only different parts will be described based on the configuration of the fifth embodiment.

In the seventh embodiment, as shown in FIGS. 20 and 21, the rotor 40 has 16 magnetic poles (that is, the number of magnetic pole pairs is 8). That is, it has 16 permanent magnets 42.

As shown in FIGS. 20 and 21, in the seventh embodiment, the stator winding 32 of each phase is composed of 10 partial windings. The partial windings of each phase are connected in series. One end of these series connectors is connected to the neutral point Q, and the other end is connected to leader wires A1, B1, and C1 connected to the inverter circuit 51, respectively. In the stator winding 32 of the present embodiment, Y connection (star connection) is used, but delta connection may be used.

Further, 30 partial windings are provided in the teeth T1 to T18 as shown in FIGS. 20 and 21. As a result, the coil body of each phase is formed. In the present embodiment, when the U-phase coil bodies Ua +, Ub−, and Uc + are used as the first phase coil bodies, the U phase corresponds to the first phase and the W phase corresponds to the second phase. In this case, the teeth T1 and T10 correspond to the first teeth, the teeth T9 and T18 correspond to the second teeth, and the teeth T8 and T17 correspond to the third teeth.

Further, in the present embodiment, when the V-phase coil bodies Va +, Vb-, and Vc + are used as the first-phase coil bodies, the V-phase corresponds to the first phase and the U-phase corresponds to the second phase. In this case, the teeth T4 and T13 correspond to the first teeth, the teeth T3 and T12 correspond to the second teeth, and the teeth T2 and T11 correspond to the third teeth.

Further, in the present embodiment, when the W phase coil bodies Wa +, Wb−, and Wc + are used as the first phase coil bodies, the W phase corresponds to the first phase and the V phase corresponds to the second phase. In this case, the teeth T7 and T16 correspond to the first teeth, the teeth T6 and T15 correspond to the second teeth, and the teeth T5 and T14 correspond to the third teeth.

As shown in FIG. 21, the coil bodies of each phase are arranged twice rotationally symmetrically with the axis of the rotating shaft 11 as the center. That is, even if the coil body is rotated by 180 degrees around the axis, the order of arrangement of the coils is the same.

With the above configuration, the teeth T9 and T18, which are the second teeth, are provided with the main windings U23- and U21- and the slave windings W16 + and W13 +, and the main windings U23- and U21- The phase difference between the magnetomotive force and the magnetomotive force of the slave windings W16 + and W13 + is 60 degrees in terms of electric angle, respectively. Further, the teeth T8 and T17, which are the third teeth, are provided with the main windings W22- and 24- and the slave windings U14 + and U11 +, and the magnetomotive force of the main windings W22- and 24- and the slave windings U14 +, The phase difference between the U11 + and the magnetomotive force is 60 degrees in terms of electrical angle.

The number of turns of the main winding "Nd" and the number of turns of the slave winding "Ne" approach Nd: Ne = 0.74: 0.39, and "Nd" and "Ne" are integers. The number of turns is set so as to be. In this embodiment, Nd: Ne = 11: 6 is set. The number of turns may be set within the range of 1.8 ≦ Nd / Ne ≦ 2.0.

Further, when the number of turns of a single winding is "Nf", the number of turns of each is set so as to satisfy the relationship of 1.2 ≦ Nf / Nd ≦ 1.5. Specifically, the number of turns is set so that Nd: Ne: Nf = 11: 6: 15.

By combining the main winding and the slave winding as described above and adjusting the number of turns, the magnetomotive force of the coil body Ua + is the same by the same reasoning as in the fifth embodiment, and the position is higher than that of the coil body Ua +. A U-phase coil body Ub− having a phase difference “λ1” of 20 + 180 degrees is configured. Further, a U-phase coil body Uc + having the same magnetomotive force of the coil body Ua + and having a phase difference “λ2” of 40 degrees with respect to the coil body Ua + is configured. The V-phase coil body and the W-phase coil body are also set in the same manner.

Thereby, each phase difference "λ1" of the magnetomotive force of the coil bodies Ub, Vb, Wb with respect to the magnetomotive force of the coil bodies Ua, Va, Wa can be set to 20 + 180 n degrees. Further, the phase difference "λ2" of the magnetomotive forces of the coil bodies Uc, Vc, and Wc with respect to the magnetomotive force of the coil bodies Ua, Va, and Wa can be set to 40 + 180 n degrees. Therefore, the 6th and 12th harmonic components can be suppressed and the torque ripple can be suppressed as in the 5th embodiment.

Further, as shown in FIGS. 20 and 21, each single winding wound around the teeth T1, T4, T7, T10, T13, and T16 as the first teeth is arranged next to the third teeth. It is connected to the slave winding that is wound around the tooth. For example, the single winding U12 + of the teeth T1 is connected to the slave winding U11 + of the teeth T17 and the slave winding U13 + of the teeth T3.

Further, the main windings provided in the teeth T3, T6, T9, T12, T15, and T18 as the second teeth are the teeth T2, T5 as the third teeth arranged two adjacent to the teeth. It is connected to the main windings provided in T8, T11, T14, and T17. For example, the main winding U21- of the teeth T18 is connected to the main winding U22-of the teeth T2. As a result, at the coil end, the crossover for connecting the slots 35 can be shortened, the connection can be facilitated, and the size can be reduced.

(8th Embodiment)
A part of the configuration of the fifth embodiment may be changed as follows. Hereinafter, only different parts will be described based on the configuration of the fifth embodiment.

In the eighth embodiment, as shown in FIGS. 22 and 23, the rotor 40 has 20 magnetic poles (that is, the number of magnetic pole pairs is 8). That is, it has 20 permanent magnets 42.

As shown in FIGS. 22 and 23, in the eighth embodiment, the stator winding 32 of each phase is composed of 10 partial windings. The partial windings of each phase are connected in series. One end of these series connectors is connected to the neutral point Q, and the other end is connected to leader wires A1, B1, and C1 connected to the inverter circuit 51, respectively. In the stator winding 32 of the present embodiment, Y connection (star connection) is used, but delta connection may be used.

Further, 30 partial windings are provided in the teeth T1 to T18 as shown in FIGS. 22 and 23. As a result, the coil body of each phase is formed. In the present embodiment, when the U-phase coil bodies Ua +, Ub−, and Uc + are used as the first phase coil bodies, the U phase corresponds to the first phase and the W phase corresponds to the second phase. In this case, the teeth T1 and T10 correspond to the first teeth, the teeth T2 and T11 correspond to the second teeth, and the teeth T3 and T12 correspond to the third teeth.

Further, in the present embodiment, when the V-phase coil bodies Va +, Vb-, and Vc + are used as the first-phase coil bodies, the V-phase corresponds to the first phase and the U-phase corresponds to the second phase. In this case, the teeth T7 and T16 correspond to the first teeth, the teeth T8 and T17 correspond to the second teeth, and the teeth T9 and T18 correspond to the third teeth.

Further, in the present embodiment, when the W phase coil bodies Wa +, Wb−, and Wc + are used as the first phase coil bodies, the W phase corresponds to the first phase and the V phase corresponds to the second phase. In this case, the teeth T4 and T13 correspond to the first teeth, the teeth T5 and T14 correspond to the second teeth, and the teeth T6 and T15 correspond to the third teeth.

By being configured as described above, as shown in FIG. 23, the coil bodies of each phase are arranged twice rotationally symmetrically with the axis of the rotating shaft 11 as the center. That is, even if the coil body is rotated by 180 degrees around the axis, the order of arrangement of the coils is the same.

Further, the teeth T2 and T11, which are the second teeth, are provided with the main windings U22- and U24- and the slave windings W14 + and W11 +, and the magnetomotive force of the main windings U22- and U24- and the slave windings W14 +, The phase difference from the magnetomotive force of W11 + is 60 degrees in terms of electrical angle. Further, the teeth T3 and T12, which are the third teeth, are provided with the main windings W23- and W21- and the slave windings U13 + and U16 +, and the magnetomotive force of the main windings W23- and W21- and the slave windings U13 +,. The phase difference between the U16 + and the magnetomotive force is 60 degrees in terms of electrical angle.

The number of turns of the main winding "Nd" and the number of turns of the slave winding "Ne" approach Nd: Ne = 0.74: 0.39, and "Nd" and "Ne" are integers. The number of turns is set so as to be. In this embodiment, Nd: Ne = 11: 6 is set. The number of turns may be set within the range of 1.8 ≦ Nd / Ne ≦ 2.0.

Further, when the number of turns of a single winding is "Nf", the number of turns of each is set so as to satisfy the relationship of 1.2 ≦ Nf / Nd ≦ 1.5. Specifically, the number of turns is set so that Nd: Ne: Nf = 11: 6: 15.

By combining the main winding and the slave winding as described above and adjusting the number of turns, the magnetomotive force of the coil body Ua + is the same by the same reasoning as in the fifth embodiment, and the position is higher than that of the coil body Ua +. A U-phase coil body Ub− having a phase difference “λ1” of 20 + 180 degrees is configured. Further, a U-phase coil body Uc + having the same magnetomotive force of the coil body Ua + and having a phase difference “λ2” of 40 degrees with respect to the coil body Ua + is configured. The V-phase coil body and the W-phase coil body are also configured in the same manner.

Thereby, each phase difference "λ1" of the magnetomotive force of the coil bodies Ub, Vb, Wb with respect to the magnetomotive force of the coil bodies Ua, Va, Wa can be set to 20 + 180 n degrees. Further, the phase difference "λ2" of the magnetomotive forces of the coil bodies Uc, Vc, and Wc with respect to the magnetomotive force of the coil bodies Ua, Va, and Wa can be set to 40 + 180 n degrees. Therefore, the 6th and 12th harmonic components can be suppressed and the torque ripple can be suppressed as in the 5th embodiment.

Further, as shown in FIGS. 22 and 23, each single winding wound around the teeth T1, T4, T7, T10, T13, and T16 as the first teeth is formed on the teeth arranged next to each other. It is connected to the provided slave winding. For example, the single winding U12 + of the teeth T1 is connected to the slave winding U11 + of the teeth T17 and the slave winding U13 + of the teeth T3.

Further, the main windings provided in the teeth T3, T6, T9, T12, T15, and T18 as the third teeth are the teeth T2, T5 as the second teeth arranged two adjacent to the teeth. It is connected to the main windings provided in T8, T11, T14, and T17. For example, the main winding U21- of the teeth T18 is connected to the main winding U22-of the teeth T2. As a result, at the coil end, the crossover for connecting the slots 35 can be shortened, the connection can be facilitated, and the size can be reduced.

(9th Embodiment)
A part of the configuration of the first embodiment may be changed as follows. Hereinafter, only different parts will be described based on the configuration of the first embodiment.

In the ninth embodiment, as shown in FIGS. 24 and 25, partial windings are arranged for each teeth T1 to T18 to form a coil body of each phase. That is, each slave winding in the first embodiment was omitted, and the main winding was changed to a single winding.

In the ninth embodiment, when the U-phase coil body Ua +, Ua-, Ub +, Ub-, Uc +, Uc- is used as the first phase coil body, the U phase corresponds to the first phase and the W phase corresponds to the first phase. Corresponds to two phases. In this case, the teeth T1 and T10 correspond to the first teeth, the teeth T5 and T14 correspond to the second teeth, and the teeth T9 and T18 correspond to the third teeth.

Further, in the ninth embodiment, when the V-phase coil bodies Va +, Va-, Vb +, Vb-, Vc +, and Vc- are used as the first phase coil bodies, the V phase corresponds to the first phase and the U phase. Corresponds to the second phase. In this case, the teeth T7 and T16 correspond to the first teeth, the teeth T2 and T11 correspond to the second teeth, and the teeth T6 and T15 correspond to the third teeth.

Further, in the ninth embodiment, when the W phase coil body Wa +, Wa−, Wb +, Wb−, Wc +, Wc− is used as the first phase coil body, the W phase corresponds to the first phase and the V phase. Corresponds to the second phase. In this case, the teeth T4 and T13 correspond to the first teeth, the teeth T8 and T17 correspond to the second teeth, and the teeth T3 and T12 correspond to the third teeth.

Further, as shown in FIGS. 24 and 25, the coil bodies of each phase are arranged twice rotationally symmetrically with respect to the axis of the rotating shaft 11.

With the above configuration, the phase difference between the magnetomotive forces of the two coils provided in the teeth T3, T6, T9, T12, T15, and T18 as the third teeth is set to 60 degrees in terms of electrical angle. The number of turns of the single winding "Ng" and the number of turns of the same winding "Nh" are set to be close to Ng / Nh = 1.73. It is not necessary that Ng / Nh = 1.73, and the number of turns may be set so as to satisfy the relationship of 1.5 ≦ Ng / Nh ≦ 2.0. Specifically, the number of turns is set so that Ng: Nh = 16: 9.

Thereby, each phase difference "λ2" of the magnetomotive force of the coil bodies Uc, Vc, Wc with respect to the magnetomotive force of the coil bodies Ua, Va, Wa can be set to 30 degrees or 210 degrees. Therefore, it is possible to suppress torque ripple as compared with the case where there is no phase difference.

Further, the number and arrangement of partial windings can be simplified as compared with the first embodiment. Further, in the motor 10, the number of magnetic poles is set to "14" and the number of slots 35 is set to "18". That is, the number of magnetic poles was (18 ± 4) × m (m is an integer of 1 or more), and the number of slots was 18 × m. As a result, the electromagnetic force can be balanced around the axis.

Then, as shown in FIG. 25, each of the same windings wound around the teeth T3, T6, T9, T12, T15, and T18 as the third tooth is provided on the tooth next to the third tooth. It is connected to the winding. As a result, at the coil end, the crossover for connecting the slots 35 can be shortened, the connection can be facilitated, and the size can be reduced.

(10th Embodiment)
A part of the configuration of the second embodiment may be changed as follows. Hereinafter, only different parts will be described based on the configuration of the second embodiment.

In the tenth embodiment, as shown in FIGS. 26 and 27, partial windings are arranged for each teeth T1 to T18 to form a coil body of each phase. That is, each slave winding in the second embodiment was omitted, and the main winding was changed to a single winding.

In the tenth embodiment, when the U-phase coil body Ua +, Ua-, Ub +, Ub-, Uc +, Uc- is used as the first phase coil body, the U phase corresponds to the first phase and the W phase corresponds to the first phase. Corresponds to two phases. Further, in the tenth embodiment, when the V-phase coil bodies Va +, Va-, Vb +, Vb-, Vc +, and Vc- are used as the first phase coil bodies, the V phase corresponds to the first phase and the U phase. Corresponds to the second phase. Further, in the tenth embodiment, when the W phase coil body Wa +, Wa−, Wb +, Wb−, Wc +, Wc− is used as the first phase coil body, the W phase corresponds to the first phase and the V phase. Corresponds to the second phase.

Further, as shown in FIGS. 26 and 27, the coil bodies of each phase are arranged twice rotationally symmetrically about the axis of the rotating shaft 11.

With the above configuration, the phase difference between the magnetomotive forces of the two coils provided in the teeth T2, T5, T8, T11, T14, and T17 as the third teeth is set to 60 degrees in terms of electrical angle. The number of turns of the single winding "Ng" and the number of turns of the same winding "Nh" are set to be close to Ng / Nh = 1.73. It is not necessary that Ng / Nh = 1.73, and the number of turns may be set so as to satisfy the relationship of 1.5 ≦ Ng / Nh ≦ 2.0. Specifically, the number of turns is set so that Ng: Nh = 16: 9.

Thereby, each phase difference "λ2" of the magnetomotive force of the coil bodies Uc, Vc, Wc with respect to the magnetomotive force of the coil bodies Ua, Va, Wa can be set to 30 degrees or 210 degrees. Therefore, it is possible to suppress torque ripple as compared with the case where there is no phase difference.

Further, the number and arrangement of partial windings can be simplified as compared with the second embodiment. Further, in the motor 10, the number of magnetic poles is set to "22" and the number of slots 35 is set to "18". That is, the number of magnetic poles was (18 ± 4) × m (m is an integer of 1 or more), and the number of slots was 18 × m. As a result, the electromagnetic force can be balanced around the axis.

Then, as shown in FIGS. 26 and 27, the same windings wound around the teeth T2, T5, T8, T11, T14, and T17 as the third teeth are provided on the teeth next to the teeth. It is connected to a single winding. As a result, at the coil end, the crossover for connecting the slots 35 can be shortened, the connection can be facilitated, and the size can be reduced.

(11th Embodiment)
A part of the configuration of the third embodiment may be changed as follows. Hereinafter, only different parts will be described based on the configuration of the third embodiment.

In the eleventh embodiment, as shown in FIGS. 28 and 29, partial windings are arranged for each teeth T1 to T18 to form a coil body of each phase. That is, each slave winding in the third embodiment was omitted, and the main winding was changed to a single winding.

In the eleventh embodiment, when the U-phase coil bodies Ua +, Ub-, and Uc + are used as the first-phase coil bodies, the U-phase corresponds to the first phase and the W-phase corresponds to the second phase. Further, in the eleventh embodiment, when the V-phase coil bodies Va +, Vb−, and Vc + are used as the first-phase coil bodies, the V-phase corresponds to the first phase and the U-phase corresponds to the second phase. Further, in the eleventh embodiment, when the W phase coil bodies Wa +, Wb−, and Wc + are used as the first phase coil bodies, the W phase corresponds to the first phase and the V phase corresponds to the second phase.

Further, as shown in FIGS. 28 and 29, the coil bodies of each phase are arranged twice rotationally symmetrically about the axis of the rotating shaft 11.

With the above configuration, the phase difference between the magnetomotive forces of the two coils provided in the teeth T2, T5, T8, T11, T14, and T17 as the third teeth is set to 60 degrees in terms of electrical angle. The number of turns of the single winding "Ng" and the number of turns of the same winding "Nh" are set to be close to Ng / Nh = 1.73. It is not necessary that Ng / Nh = 1.73, and the number of turns may be set so as to satisfy the relationship of 1.5 ≦ Ng / Nh ≦ 2.0. Specifically, the number of turns is set so that Ng: Nh = 16: 9.

Thereby, each phase difference "λ2" of the magnetomotive force of the coil bodies Uc, Vc, Wc with respect to the magnetomotive force of the coil bodies Ua, Va, Wa can be set to 30 degrees or 210 degrees. Therefore, it is possible to suppress torque ripple as compared with the case where there is no phase difference.

Further, the number and arrangement of partial windings can be simplified as compared with the third embodiment. Then, as shown in FIGS. 28 and 29, the same windings wound around the teeth T2, T5, T8, T11, T14, and T17 as the third teeth are provided on the teeth next to the teeth. It is connected to a single winding. As a result, at the coil end, the crossover for connecting the slots 35 can be shortened, the connection can be facilitated, and the size can be reduced.

(12th Embodiment)
A part of the configuration of the fourth embodiment may be changed as follows. Hereinafter, only different parts will be described based on the configuration of the fourth embodiment.

In the twelfth embodiment, as shown in FIGS. 30 and 31, partial windings are arranged for each teeth T1 to T18 to form a coil body of each phase. That is, each slave winding in the fourth embodiment was omitted, and the main winding was changed to a single winding.

In the twelfth embodiment, when the U-phase coil bodies Ua +, Ub-, and Uc + are used as the first-phase coil bodies, the U-phase corresponds to the first phase and the W-phase corresponds to the second phase. Further, in the twelfth embodiment, when the V-phase coil bodies Va +, Vb−, and Vc + are used as the first-phase coil bodies, the V-phase corresponds to the first phase and the U-phase corresponds to the second phase. Further, in the twelfth embodiment, when the W phase coil bodies Wa +, Wb−, and Wc + are used as the first phase coil bodies, the W phase corresponds to the first phase and the V phase corresponds to the second phase. Further, as shown in FIG. 31, the coil bodies of each phase are arranged twice rotationally symmetrically with respect to the axial center of the rotating shaft 11.

With the above configuration, the phase difference between the magnetomotive forces of the two coils provided in the teeth T3, T6, T9, T12, T15, and T18 as the third teeth is set to 60 degrees in terms of electrical angle. The number of turns of the single winding "Ng" and the number of turns of the same winding "Nh" are set to be close to Ng / Nh = 1.73. It is not necessary that Ng / Nh = 1.73, and the number of turns may be set so as to satisfy the relationship of 1.5 ≦ Ng / Nh ≦ 2.0. Specifically, the number of turns is set so that Ng: Nh = 16: 9.

Thereby, each phase difference "λ2" of the magnetomotive force of the coil bodies Uc, Vc, Wc with respect to the magnetomotive force of the coil bodies Ua, Va, Wa can be set to 30 degrees or 210 degrees. Therefore, it is possible to suppress torque ripple as compared with the case where there is no phase difference.

Further, the number and arrangement of partial windings can be simplified as compared with the fourth embodiment. Then, as shown in FIGS. 30 and 31, each of the same windings wound around the teeth T3, T6, T9, T12, T15, and T18 as the third teeth is provided on the teeth next to the teeth. It is connected to a single winding. As a result, at the coil end, the crossover for connecting the slots 35 can be shortened, the connection can be facilitated, and the size can be reduced.

(Other embodiments)
-In the above embodiment, the circuit is realized by one inverter circuit 51, but the circuit may be configured by using two inverter circuits. In this case, for example, the partial winding U1 * ±, V1 * ±, W1 * ± (“*” is any number from 1 to 6) is connected to the first inverter circuit, and the partial winding U2 * ±, V2 * ±, W2 * ± (“*” is any number from 1 to 6) may be configured to be connected to the second inverter circuit.

When connecting to two inverter circuits, as shown in FIG. 32, leader wires A1, B1, C1, A2, B2, C2 of the stator windings 32 of each phase may be arranged. That is, the leader lines A1, B1, C1, A2, B2, and C2 may be arranged so that their phases are symmetrical with respect to the axis of the rotation axis 11. As a result, the leakage flux generated from the leader lines A1, B1, C1, A2, B2, and C2 can be balanced and canceled, so that the detection error of the angle sensor 12 can be suppressed.

-In the above embodiment, the stator windings 32 of each phase have partial windings connected in series, but partial windings may be connected in parallel. In this case, for example, the partial windings U1 * ±, V1 * ±, W1 * ± (“*” is any number from 1 to 6) are connected in series, and the partial windings U2 * ±, V2 * ± , W2 * ± (“*” is any number from 1 to 6) may be connected in series, and the series connectors may be connected in parallel.

-In the above embodiment, the phase difference between the main winding and the slave winding and the phase difference between the same windings are set to 60 degrees in the electric angle, but the electric angle is in the range of 52 degrees to 68 degrees. It may be set as such.

-In the above embodiment, how to connect the crossovers between the partial windings may be arbitrarily changed.

-In the above embodiment, the number of magnetic poles and the number of slots may be changed. For example, the number of magnetic poles in the field portion may be (18 ± 4) × m (m is an integer of 1 or more), and the number of slots between teeth may be 18 × m. Further, the number of magnetic poles in the field portion may be (18 ± 2) × Q (Q is an integer of 1 or more), and the number of slots between teeth may be 18 × Q.

Although the present disclosure has been described in accordance with the examples, it is understood that the present disclosure is not limited to the examples and structures. The present disclosure also includes various variations and variations within a uniform range. In addition, various combinations and forms, as well as other combinations and forms that include only one element, more, or less, are within the scope and scope of the present disclosure.

Claims (10)

1. In a rotary electric machine (10) including a field portion (40) having a plurality of magnetic poles having alternating polarities in the circumferential direction and an armature (30) having a multi-phase armature winding (32).
   A three-phase current is supplied from the inverter (51) to the armature winding.
   The armature is
   Of the three phases, the armature winding of the first phase is wound, and the armature winding of the second phase is wound less than the number of turns of the armature winding of the first phase. By doing so, the first tooth provided with the coil body of the first phase and
   Of the three phases, the armature winding of the first phase is wound, and the armature winding of the third phase is wound less than the number of turns of the armature winding of the first phase. By doing so, the second tooth provided with the coil body of the first phase and
   A third tooth provided with a coil body of the first phase by winding the armature winding of the first phase and the armature winding of the third phase in the same manner among the three phases. And have,
   The magnetomotive force of the partial winding of the first phase provided by winding the armature winding of the first phase around the third tooth and the armature winding of the third phase wound around the third tooth. A rotary electric machine in which the phase difference from the magnetomotive force of the third phase partial winding provided is set to be within the range of 52 degrees to 68 degrees in terms of electric angle.
2. The magnetomotive force of the partial winding of the first phase provided by winding the armature winding of the first phase around the first tooth and the armature winding of the second phase wound around the first tooth. The phase difference from the magnetomotive force of the second phase partial winding provided is within the range of 52 degrees to 68 degrees in terms of electrical angle, and
   The magnetomotive force of the partial winding of the first phase provided by winding the armature winding of the first phase around the second tooth and the armature winding of the third phase wound around the second tooth. The rotary electric machine according to claim 1, wherein the phase difference from the magnetomotive force of the third phase partial winding provided is set to be within the range of 52 degrees to 68 degrees in terms of electric angle.
3. The number of turns of the armature winding of the first phase wound around the first tooth and the second tooth is set to "Na", respectively, and the armature winding of the second phase wound around the first tooth. When the number of windings of the wire and the number of windings of the armature winding of the third phase wound around the second tooth are "Nb", the relationship of 3.0≤Na / Nb≤6.0 is established. The rotary electric machine according to claim 1 or 2, wherein the number of turns is set so as to satisfy the requirements.
4. The number of turns of the armature winding of the first phase wound around the first tooth and the second tooth is set to "Na", respectively, and the armature winding of the first phase wound around the third tooth. When the number of windings of the wire and the number of windings of the armature winding of the third phase wound around the third tooth are "Nc", the relationship of 1.4≤Na / Nc≤1.8 is established. The rotary electric machine according to any one of claims 1 to 3, wherein the number of turns is set so as to satisfy the requirements.
5. In a rotary electric machine (10) including a field portion (40) having a plurality of magnetic poles having alternating polarities in the circumferential direction and an armature (30) having a multi-phase armature winding (32).
   A three-phase current is supplied from the inverter (51) to the armature winding.
   The armature is
   Of the three phases, the first tooth around which the armature winding of the first phase is wound, and
   Of the three phases, the armature winding of the first phase is wound, and the armature winding of the second phase is wound less than the number of turns of the armature winding of the first phase. The second tooth to be done,
   Of the three phases, the armature winding of the second phase is wound, and the armature winding of the first phase is wound less than the number of turns of the armature winding of the second phase. With a third tooth, which is
   The magnetomotive force of the partial winding of the first phase provided by winding the armature winding of the first phase with respect to the second tooth or the third tooth, and the armature winding of the second phase. A rotary electric machine in which the phase difference from the magnetomotive force of the second phase partial winding provided by winding is set to be within the range of 52 degrees to 68 degrees in terms of electric angle.
6. The number of turns of the armature winding of the first phase wound around the second tooth and the number of turns of the armature winding of the second phase wound around the third tooth are defined as "Nd", respectively. The number of turns of the armature winding of the second phase wound around the second tooth and the number of turns of the armature winding of the first phase wound around the third tooth are "Ne", respectively. The rotary electric machine according to claim 5, wherein the number of turns is set so as to satisfy the relationship of 1.8 ≦ Nd / Ne ≦ 2.0.
7. The number of turns of the armature winding of the first phase wound around the first teeth is defined as "Nf", and the number of turns of the armature windings of the first phase wound around the second teeth is defined as "Nf". When the number of turns of the armature winding of the second phase wound around the third tooth is "Nd", the number of turns of each armature so as to satisfy the relationship of 1.2 ≤ Nf / Nd ≤ 1.5. The rotary electric machine according to claim 5 or 6, wherein is set.
8. In a rotary electric machine (10) including a field portion (40) having a plurality of magnetic poles having alternating polarities in the circumferential direction and an armature (30) having a multi-phase armature winding (32).
   A three-phase current is supplied from the inverter (51) to the armature winding.
   The armature is
   Of the three phases, the first tooth around which the armature winding of the first phase is wound, and
   Of the three phases, the second tooth around which the armature winding of the first phase is wound, and
   Of the three phases, the armature winding of the first phase and the armature winding of the second phase are similarly wound with a third tooth.
   The magnetomotive force of the partial winding of the first phase provided by winding the armature winding of the first phase around the third tooth and the armature winding of the second phase wound around the third tooth. A rotary electric machine in which the phase difference from the magnetomotive force of the second phase partial winding provided is set to be within the range of 52 degrees to 68 degrees in terms of electric angle.
9. The number of turns of the armature winding of the first phase wound around the first tooth and the second tooth is set to "Ng", respectively, and the armature winding of the first phase wound around the third tooth. When the number of turns of the wire and the number of turns of the armature winding of the second phase wound around the third tooth are "Nh", the relationship of 1.5 ≤ Ng / Nh ≤ 2.0 is established. The rotary electric machine according to claim 8, wherein the number of turns is set so as to satisfy the requirements.
10. Any of claims 1 to 9, wherein the number of magnetic poles in the field portion is (18 ± 4) × m (m is an integer of 1 or more), and the number of slots between the teeth is 18 × m. The rotary electric machine according to item 1.

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