JPWO2007043161A1 - Rotating electric machine and in-vehicle rotating electric machine system - Google Patents

Abstract

An object of the present invention is to provide a rotating electrical machine that can directly control a field magnetic flux with a current, has a large torque, and can be multipolarized or flattened. The stator 20 includes claw pole type unit stators 20U, 20V, and 20W juxtaposed in the direction of the rotation axis of the rotating electrical machine. The rotor 10 includes claw pole type unit rotors 10U, 10V, and 10W of the rotating electrical machine. Three of them are juxtaposed in the axial direction. The stator coils 41, 42, 43 and the rotor coils 31, 32, 33 are annular coils. The stator core and the rotor core are provided at the annular yoke around the rotating shaft, the teeth extending in the radial direction from both axial ends of the annular yoke, and the tips of the teeth. It consists of a claw pole that is magnetized.

Description

  The present invention relates to a rotating electrical machine having a claw pole type rotor and an on-vehicle rotating electrical machine system, and more particularly to a rotating electrical machine and an on-vehicle rotating electrical machine system that are suitable for mounting in a hybrid electric vehicle, an electric vehicle, a fuel cell vehicle, and the like.

  Currently, permanent magnet synchronous rotating electrical machines are widely used as automotive rotating electrical machines that require high output. A conventional permanent magnet synchronous rotating electric machine generally includes a rotor having an embedded or surface magnet type permanent magnet, and a stator in which a stator coil is wound around a slot of a stator core by concentrated winding or distributed winding. Is done. Here, since the coil ends of the stator coil wound around the stator core jump out from both end portions of the stator core, the axial length of the rotating electrical machine becomes long.

  On the other hand, although it is not a rotating electrical machine for automobiles, for example, as described in JP-A-7-227075 and JP-A-2004-15998, a claw pole type stator is laminated in a three-stage axial direction as a stator. Is known. Since the stator coil is annularly housed inside the stator, the axial length of the rotating electrical machine can be shortened.

JP-A-7-227075 JP 2004-15998 A

  However, as described above, in the case where the rotor is provided with a permanent magnet, inconvenience arises when used as a rotating electrical machine for automobiles. In other words, rotating electrical machines for automobiles are generally used in a wide range of rotational speeds, but in the case where a rotor is provided with a permanent magnet, the field magnetic flux is constant, so that the counter electromotive force induced in the stator coil during high-speed rotation. Increases in proportion to the rotational speed. Therefore, in order to rotate at high speed, it is necessary to increase the power supply voltage and current. In a situation where it is not necessary to generate torque, the field magnetic flux of the permanent magnet causes loss torque.

  Therefore, the inventors of the present application have conducted a magnetic flux analysis and examined the case where a claw pole type rotor conventionally used in an alternator or the like is used as the rotor. As the stator, a claw pole type stator as described in Japanese Patent Application Laid-Open No. 7-227075 or Japanese Patent Application Laid-Open No. 2004-15998 is used. The rotor is a conventional alternator or the like. It has been found that the rotating electric machine using the single claw pole type rotor used has a problem that the magnetic flux becomes non-uniform so that the magnetic flux utilization rate is reduced and the output torque is small.

  An object of the present invention is to provide a rotating electrical machine and a vehicle-mounted rotating electrical machine system that can rotate at high speed and have a large output torque.

(1) In order to achieve the above object, the present invention provides a rotating electrical machine including a stator having a stator core and a stator coil, and a rotor having a rotor core and a rotor coil, the stator having a claw pole type The three unit stators are juxtaposed in the direction of the rotation axis of the rotating electrical machine, and the rotor is configured by juxtaposing three claw pole type unit rotors in the axial direction of the rotating electrical machine, and the stator of the unit stator The coil includes an annular coil, and the stator core of the unit stator is provided at an annular yoke around the rotation shaft, teeth extending in a radial direction from both axial ends of the annular yoke, and tips of the teeth, A claw pole that is alternately magnetized with different polarities in the circumferential direction when the annular coil is energized, and the rotor coil of the unit rotor Is formed of an annular coil, and the rotor core of the unit rotor is provided at an annular yoke around the rotation axis, teeth extending in a radial direction from both axial ends of the annular yoke, and the tips of the teeth. It consists of claw poles that are alternately magnetized in different directions in the circumferential direction when the coil is energized.
With this configuration, it is possible to obtain a rotating electrical machine that can rotate at a high speed and has a large output torque.

  (2) In the above (1), preferably, among the three unit rotors juxtaposed, the claw pole positions of the same polarity of adjacent unit rotors are displaced in the circumferential direction by an electrical angle of α °, Of the three unit stators arranged side by side, the claw pole positions of adjacent unit stators are displaced in the circumferential direction by β ° in electrical angle, where | α−β | = 60 °. is there.

(3) In the above (1), preferably, among the three unit rotors arranged in parallel, the claw pole positions of the same polarity of the adjacent unit rotors are displaced in the circumferential direction by an electrical angle of α °, Among the three unit stators arranged side by side, the claw pole positions of adjacent unit stators are displaced in the circumferential direction by β ° in electrical angle, where | α−β | = 120 °. is there.
Rotating electric machine characterized by that.

  (4) In the above (1) or (2), α + β = 0 is preferable.

  (5) In the above (4), preferably, α = 30, β = −30, or α = −30, β = 30.

  (6) In the above (1), preferably, when the opposing unit rotor and the unit stator are unit blocks, magnetic gaps provided between adjacent unit blocks are provided.

  (7) In the above (1), preferably, the claw pole of the rotor and the claw pole of the stator are made of a dust core.

  (8) In the above (1), preferably, the unit rotors are arranged between claw poles having different polarities, and permanent magnets magnetized in such a direction as to cancel the leakage magnetic field between the claw poles. It is intended to provide.

  (9) In the above (8), preferably, the permanent magnet is made of a bonded magnet, the claw pole is made of a powder magnetic core, and the permanent magnet and the claw pole are compression molded in two colors. It is what is done.

(10) In order to achieve the above object, the present invention provides an in-vehicle rotation having a rotating electric machine that generates a vehicle driving force or a driving force for an in-vehicle auxiliary machine, and an inverter that controls electric power supplied to the rotating electric machine. The rotating electrical machine includes a stator having a stator core and a stator coil, and a rotor having a rotor core and a rotor coil. The stator rotates a claw pole type unit stator of the rotating electrical machine. It is a configuration in which three rotors are juxtaposed in the axial direction, and the rotor is a configuration in which three claw pole-type unit rotors are juxtaposed in the axial direction of the rotating electrical machine, and the stator coil of the unit stator is an annular coil, The stator core of the unit stator includes an annular yoke around the rotating shaft and teeth extending radially from both axial ends of the annular yoke. A claw pole provided at the tip of the teeth and alternately magnetized in the circumferential direction when the annular coil is energized, and the rotor coil of the unit rotor comprises an annular coil, and the unit The rotor core of the rotor is provided at an annular yoke around the rotation shaft, teeth extending radially from both axial ends of the annular yoke, and tips of the teeth, and in a circumferential direction when the annular coil is energized. It consists of claw poles that are alternately magnetized to different polarities.
With this configuration, an in-vehicle rotating electrical machine system that can rotate at a high speed and has a large output torque can be obtained.

  According to the present invention, high-speed rotation is possible and the output torque can be increased.

1 is a longitudinal sectional view showing an overall configuration of a rotating electrical machine according to a first embodiment of the present invention. It is a disassembled perspective view which shows the structure of the rotor and stator which are used for the rotary electric machine by the 1st Embodiment of this invention. It is a perspective view which shows the assembly state of the rotor and stator which are used for the rotary electric machine by the 1st Embodiment of this invention. It is a perspective view which shows the structure of the unit rotor which comprises the rotor used for the rotary electric machine by the 1st Embodiment of this invention. It is a disassembled perspective view which shows the structure of the unit stator which comprises the stator used for the rotary electric machine by the 1st Embodiment of this invention. It is a perspective view which shows the structure of the unit rotor which comprises the rotor used for the rotary electric machine by the 1st Embodiment of this invention. It is a disassembled perspective view which shows the structure of the unit stator which comprises the stator used for the rotary electric machine by the 1st Embodiment of this invention. It is a disassembled perspective view which shows the structure of the rotor and stator which are used for the rotary electric machine by the 2nd Embodiment of this invention. It is a disassembled perspective view which shows the structure of the rotor and stator which are used for the rotary electric machine by the 3rd Embodiment of this invention. It is a disassembled perspective view which shows the structure of the rotor and stator which are used for the rotary electric machine by the 4th Embodiment of this invention. It is a disassembled perspective view which shows the structure of the rotor and stator which are used for the rotary electric machine by the 5th Embodiment of this invention. It is a disassembled perspective view which shows the structure of the rotor and stator which are used for the rotary electric machine by the 6th Embodiment of this invention. It is a disassembled perspective view which shows the structure of the rotor and stator which are used for the rotary electric machine by the 7th Embodiment of this invention. It is a principal part expanded view which shows the structure of the rotor used for the rotary electric machine by the 7th Embodiment of this invention. It is a disassembled perspective view which shows the structure of the rotor and stator which are used for the rotary electric machine by the 8th Embodiment of this invention. It is a disassembled perspective view which shows the structure of the rotor and stator which are used for the rotary electric machine by the 9th Embodiment of this invention. 1 is a block diagram showing an electric drive system of a hybrid electric vehicle that is one of electric vehicles using a rotating electric machine according to each embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an electric drive system of an electric vehicle that is one of electric vehicles using a rotating electric machine according to each embodiment of the present invention. It is a block diagram which shows the structure of the electric vehicle at the time of using the rotary electric machine by each embodiment of this invention as an in-wheel motor / generator.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Rotor 10U, 10V, 10W ... Unit rotor 11, 12, 13, 14 ... Rotor core 11A, 12A ... Ring yoke 11B, 12B ... Teeth 11C, 12C ... Claw pole 20 ... Stator 20U, 20V, 20W ... Unit stator 21, 22, 23, 24 ... stator cores 21A, 22A ... annular yokes 21B, 22B ... teeth 21C, 22C ... claw poles 31, 32, 33, 41, 42, 43 ... annular coils 50 ... permanent magnets

Hereinafter, the configuration of the rotating electrical machine according to the first embodiment of the present invention will be described with reference to FIGS.
Initially, the whole structure of the rotary electric machine by this embodiment is demonstrated using FIG.
FIG. 1 is a longitudinal sectional view showing an overall configuration of a rotating electrical machine according to a first embodiment of the present invention.

  The rotating electrical machine includes a rotor 10 and a stator 20. The rotor 10 includes three unit rotors of a claw pole type U-phase rotor 10U, a W-phase rotor 10W, and a V-phase rotor 10V, which are stacked in the axial direction of the rotating electrical machine as illustrated, and are held by a holding member 10H. Holding fixed. The configuration of the unit rotors 10U, 10V, and 10W for each phase will be described later with reference to FIG. The rotor 10 is fixed to the hollow shaft 60 via the holding member 10H.

  The stator 20 includes three unit stators of a claw pole type U-phase stator 20U, a W-phase stator 20W, and a V-phase stator 20V, which are stacked in the axial direction of the rotating electrical machine as illustrated, and are held by a holding member 20H. Holding fixed. The configuration of the unit stators 20U, 20V, and 20W for each phase will be described later with reference to FIG. The stator 20 is fixed to the inner peripheral side of the housing 70 via the holding member 20H.

  Here, the length of the claw pole type U-phase rotor 10U in the rotation axis direction is equal to the length of the claw pole type U-phase stator 20U in the rotation axis direction. The length of the claw pole type W-phase rotor 10W in the rotation axis direction is equal to the length of the claw pole type W-phase stator 20W in the rotation axis direction. Further, the length of the claw pole type V-phase rotor 10V in the rotation axis direction is equal to the length of the claw pole type V-phase stator 20V in the rotation axis direction. Therefore, the non-uniformity of the magnetic flux between the rotor and the stator can be improved and the magnetic flux can be made uniform. As a result, the output torque can be increased.

  A front bracket 72F and a rear bracket 72R are fixed to both ends of the housing 70. Bearings 61F and 61R are attached to the front bracket 72F and the rear bracket 72R, respectively, and the hollow shaft 60 is rotatably supported.

  A gap of 1 mm or less is provided between the inner peripheral side of the stator 20 and the outer peripheral side of the rotor 10, so that the rotor 10 can rotate with respect to the stator 20.

  The above configuration shows the configuration of an inner rotor type rotating electrical machine, but the present embodiment can also be applied to an outer rotor type rotating electrical machine.

Next, the configuration of the rotor and the stator used in the rotating electrical machine according to the present embodiment will be described with reference to FIGS.
FIG. 2 is an exploded perspective view showing the configuration of the rotor and the stator used in the rotating electrical machine according to the first embodiment of the present invention. FIG. 3 is a perspective view showing an assembled state of the rotor and the stator used in the rotating electrical machine according to the first embodiment of the present invention. FIG. 4 is a perspective view showing a configuration of a unit rotor constituting the rotor used in the rotating electrical machine according to the first embodiment of the present invention. FIG. 5 is an exploded perspective view showing the configuration of the unit stator that constitutes the stator used in the rotating electrical machine according to the first embodiment of the present invention. FIG. 6 is a perspective view showing a configuration of a unit rotor constituting the rotor used in the rotating electrical machine according to the first embodiment of the present invention. FIG. 7 is an exploded perspective view showing the configuration of the unit stator that constitutes the stator used in the rotating electrical machine according to the first embodiment of the present invention. In each figure, the same reference numeral indicates the same part, and the same reference numeral as in FIG. 1 indicates the same part.

  In FIG. 2, the rotor 10 and the stator 20 are disassembled and displayed in the direction of the rotation axis, but in actuality, they are used in combination as shown in FIG.

  As shown in FIG. 2, the rotor 10 includes rotor cores 11, 12, 13, and 14 and annular coils 31, 32, and 33. If it demonstrates in contrast with FIG. 1, the U-phase rotor 10U is comprised by the rotor core 11, the half of the rotor core 12, and the annular coil 31. FIG. The remaining half of the rotor core 12, the half of the rotor core 13, and the annular coil 32 constitute a W-phase rotor 10W. Further, the remaining half of the rotor core 13, the rotor core 14, and the annular coil 33 constitute a V-phase rotor 10 </ b> V.

  The stator 20 includes stator cores 21, 22, 23, and 24 and annular coils 41, 42, and 43. If it demonstrates in contrast with FIG. 1, the U-phase stator 20U is comprised by the stator core 21, the half of the stator core 22, and the annular coil 41. FIG. The remaining half of stator core 22, half of stator core 23, and annular coil 42 constitute W-phase stator 20W. Further, the remaining half of the stator core 23, the stator core 24, and the annular coil 43 constitute a V-phase stator 20V.

  Next, the configuration of the U-phase rotor 10U that is a unit rotor core used in the rotating electrical machine according to the present embodiment will be described with reference to FIG. In FIG. 4, a part of the unit rotor is cut out and displayed. The configurations of the V-phase rotor 10V and the W-phase rotor 10W are the same. Each unit rotor 10U, 10V, 10W is juxtaposed in the axial direction to constitute the rotor 10.

  The U-phase rotor 10U, which is a unit rotor, includes rotor cores 11 and 12 'and an annular coil 31. The rotor core 12 'corresponds to half of the rotor core 12 shown in FIG. The rotor core 11 is provided at the annular yoke 11A around the rotation axis, the teeth 11B extending in the radial direction from both axial ends of the annular yoke 11A, and the tips of the teeth 11B, and alternately in the circumferential direction when the annular coil 31 is energized. And claw poles 11A magnetized to different polarities. Further, the rotor core 12 ′ is provided at the annular yoke 12A around the rotation axis, the teeth 12B extending radially from both axial ends of the annular yoke 12A, and the tips of the teeth 12B. It consists of claw poles 12A that are magnetized alternately with different polarities in the direction. Each of these rotor cores 11 and 12 ′ is integrally formed with a dust core and manufactured.

  The annular coil 31 is disposed in a region surrounded by the teeth 11B and 12B and the annular yokes 11A and 12A. The number of magnetic poles of the unit rotor 10U is 24. The annular coil 31 is previously formed by winding a conductive wire with an insulation coating in a ring shape for a predetermined number of turns. The annular coil 31 is desirably wound with high density using a rectangular wire.

  Next, the assembly process of the rotor 10 used in the rotating electrical machine according to the present embodiment will be described with reference to FIG.

  An annular coil 33 is inserted into the rotor core 14. Next, the annular coil 33 is held between the rotor core 14 and the rotor core 13 by press-fitting the rotor core 13 into the rotor core 14. Next, the annular coil 32 is inserted into the rotor core 13. The annular coil 32 is held between the rotor core 13 and the rotor core 12 by press-fitting the rotor core 12 into the rotor core 13. Finally, the annular coil 31 is inserted into the rotor core 12. The annular coil 31 is held between the rotor core 12 and the rotor core 11 by press-fitting the rotor core 11 into the rotor core 12.

  The rotor cores 11, 12, 13, and 14 may be configured by combining those that are further divided into a plurality of parts and molded.

  Next, the configuration of the U-phase stator 20U that is a unit stator core used in the rotating electrical machine according to the present embodiment will be described with reference to FIG. In FIG. 6, a part of the unit stator is notched and displayed. The configurations of the V-phase stator 20V and the W-phase stator 20W are the same. Three unit stators 20U, 20V, and 20W are juxtaposed in the axial direction to form the stator 20.

  A U-phase stator 20U, which is a unit stator, includes stator cores 21 and 22 'and an annular coil 31. The stator core 22 'corresponds to half of the stator core 22 shown in FIG. The stator core 21 is provided on the annular yoke 21A around the rotation axis, the teeth 21B extending in the radial direction from both axial ends of the annular yoke 21A, and the tips of the teeth 21B, and alternately in the circumferential direction when the annular coil 41 is energized. And claw pole 21A magnetized with different polarity. The stator core 22 ′ is provided at the annular yoke 22A around the rotation axis, the teeth 22B extending in the radial direction from both axial ends of the annular yoke 22A, and the tips of the teeth 22B. It consists of claw poles 22A that are magnetized alternately with different polarities in the direction. Each of these stator cores 21 and 22 'is integrally formed with a dust core and manufactured.

  The annular coil 41 is disposed in a region surrounded by the teeth 21B and 22B and the annular yokes 21A and 22A. The number of magnetic poles of the unit stator 20U is 24. The annular coil 41 is previously formed by winding a conductive wire with an insulation coating in a ring shape for a predetermined number of turns. The annular coil 41 is preferably wound with high density using a flat wire.

  Next, the assembly process of the stator 20 used in the rotating electrical machine according to the present embodiment will be described with reference to FIG.

  An annular coil 43 is inserted into the stator core 24. Next, the annular coil 43 is held between the stator core 24 and the stator core 23 by press-fitting the stator core 23 into the stator core 24. Next, the annular coil 42 is inserted into the stator core 23. The annular coil 42 is held between the stator core 23 and the stator core 22 by press-fitting the stator core 22 into the stator core 23. Finally, the annular coil 41 is inserted into the stator core 22. Then, the annular coil 41 is held between the stator core 22 and the stator core 21 by press-fitting the stator core 21 into the stator core 22.

  The stator cores 21, 22, 23, and 24 may be configured by combining those that are further divided into a plurality of parts and molded.

  Further, in the configuration of the rotor 10 and the stator 20 shown in FIG. 2, the direction of the current supplied to the annular coil 31 and the annular coil 33 is the same direction, and the direction of the current supplied to the annular coil 32 is different from those. Try to reverse. The claw poles of the same polarity of the unit rotors constituting the rotor 10 are displaced in the circumferential direction by α = 30 ° in electrical angle (α / N = 2.5 ° in mechanical angle). Here, 2N is the number of magnetic poles of the stator, and in the example shown in FIG. 2, N = 12.

  On the other hand, the claw poles of the same polarity of the unit stators constituting the stator 20 are displaced in the circumferential direction by β = −30 ° in electrical angle (β / M = −2.5 ° in mechanical angle). Here, 2M is the number of magnetic poles of the rotor, and M = 12, as shown in FIG. Therefore, | α−β | = 60 °. That is, the attributes of the annular coils 41, 42, 43 of the stator 20 are as follows. If the annular coil 41 is U phase, the annular coil 42 is −W phase (W phase if the direction of connection is reversed), and the annular coil 43 is V phase.

  Here, by setting α + β = 0, leakage of magnetic flux between stages, that is, between the U-phase rotor 11 and the W-phase rotor 12 and between the U-phase stator 21 and the W-phase stator 22 can be reduced. Therefore, the output torque can be increased as much as leakage of magnetic flux can be reduced.

  When a claw pole type rotor is used, a problem arises when the claw pole of the rotor (claw portion of the claw-type magnetic pole) is raised due to centrifugal force when rotating at high speed. The longer the length of the claw portion in the rotation axis direction, the easier it is to get up. Therefore, compared to the case where the rotor is a single claw pole type rotor, as shown in FIG. 1 and FIG. 2, the rotor is configured by arranging three claw pole type rotors in parallel in the axial direction. The length of the claw portion in the direction of the rotation axis of the claw portion of the claw pole can be made approximately 1/3. Accordingly, since the centrifugal force is also reduced, the radial thickness of the original portion of the claw portion can be reduced. As a result, the thickness of the rotor core in the radial direction (in FIG. 4, (the outer diameter of the claw poles 11C and 112C) − (the inner diameter of the annular cores 11A and 12A)) can be reduced. Thus, a space can be provided on the inner diameter side of the rotor 10. That is, the rotor can be thin in the radial direction. A mechanism such as a speed reducer can be disposed in this space.

  According to this embodiment, the shape of the claw pole can be made substantially the same between the rotor and the stator, and the magnetic flux is closed between the rotor and the stator. It is possible to improve and make the magnetic flux uniform. Therefore, the output torque can be increased.

  In addition, since the length of the claw portion of the claw pole of the claw pole in the rotation axis direction can be shortened, the rotor core can be made thin and thin in the radial direction. Such a mechanism unit can be arranged.

  Further, since the rotor coil is annular and has no coil end, Joule loss is reduced, and the rotor becomes smaller and lighter. In addition, since the winding work is simplified, productivity is improved. Further, since the stator coil is annular and has no coil end, Joule loss is reduced, and the stator becomes smaller and lighter. In addition, productivity is improved because the winding work is simplified.

  Further, by shifting the claw pole position of the same polarity in the circumferential direction by a predetermined angle both between each unit rotor constituting the rotor and between each unit stator constituting the stator, only one of the rotor and the stator is displaced. The absolute value of the angle to be displaced is smaller than the displacement. As a result, the leakage magnetic flux decreases, and the torque increases. Among the three unit rotors juxtaposed, the claw pole positions of the same polarity of the adjacent unit rotors are displaced in the circumferential direction by an electrical angle of α °, and adjacent to each other among the three unit stators juxtaposed. The claw pole position of the unit stator is displaced in the circumferential direction by an electrical angle of β °. By setting | α−β | = 60 °, among the three unit rotors arranged side by side, The claw pole positions of the same polarity are displaced in the circumferential direction by an electrical angle of α °, and among the three unit stators juxtaposed, the claw pole positions of adjacent unit stators are moved in the circumferential direction by an electrical angle of β °. Since the absolute value of the angle to be displaced is smaller than in the case where | α−β | = 120 °, the leakage of magnetic flux between stages can be further reduced.

  Furthermore, by providing a gap between the unit blocks, it is possible to increase the degree of freedom in spatial arrangement, such as installing various gears in the gap.

  In addition, by making the rotor or stator claw pole with a dust core, multipolarization and flattening are possible. As a result, the inside of the rotor can be opened widely, so that the entire rotating electrical machine can be reduced in size by installing brushes and various gears for supplying power to the rotor coil. Moreover, since eddy current loss is reduced as a feature of the material, efficiency is improved.

  Further, by using a rectangular wire for the rotor coil and the stator coil, it becomes possible to wind the winding at a higher density, and the efficiency is improved.

  Further, by providing a permanent magnet between the claw poles of different polarities of the rotor, the leakage magnetic field between the claw poles of different polarities of the rotor is reduced, so that the torque is further increased.

  In addition, by using a permanent magnet as a bonded magnet and compression molding with a claw pole made of a dust core in two colors, the number of parts required for assembly is reduced, thus improving productivity.

Next, the configuration of the rotating electrical machine according to the second embodiment of the present invention will be described with reference to FIG. The overall configuration of the rotating electrical machine according to the present embodiment is the same as that shown in FIG.
FIG. 8 is an exploded perspective view showing the configuration of the rotor and the stator used in the rotating electrical machine according to the second embodiment of the present invention.

  The rotor 10 </ b> A includes rotor cores 11, 12 </ b> A, 13 </ b> A, 14 </ b> A and annular coils 31, 32, 33. The stator 20 </ b> A includes stator cores 21, 22 </ b> A, 23 </ b> A, and 24 </ b> A and annular coils 41, 42, and 43.

  Here, the claw poles of the same polarity of the unit rotors constituting the rotor 10A coincide with the circumferential direction, and α = 0 °. The claw pole of the same polarity of each unit stator constituting the stator 20 is displaced in the circumferential direction by β = −60 ° in electrical angle (β / M = −5 ° in mechanical angle). Therefore, as in the embodiment shown in FIG. 2, | α−β | = 60 °. That is, the attributes of the annular coils 41, 42, and 43 of the stator are as follows: if the annular coil 41 is a U phase, the annular coil 42 is -W phase (W phase if the direction of connection is reversed), and the annular coil 43 is V Become a phase.

  Also in this embodiment, the non-uniformity of the magnetic flux between the rotor and the stator can be improved, the magnetic flux can be made uniform, and the output torque can be increased.

  In addition, since the length of the claw portion of the claw pole of the claw pole in the rotation axis direction can be shortened, the rotor core can be made thin and thin in the radial direction. Such a mechanism unit can be arranged.

Next, the structure of the rotating electrical machine according to the third embodiment of the present invention will be described with reference to FIG. The overall configuration of the rotating electrical machine according to the present embodiment is the same as that shown in FIG.
FIG. 9 is an exploded perspective view showing the configuration of the rotor and the stator used in the rotating electrical machine according to the third embodiment of the present invention.

  The rotor 10B includes rotor cores 11, 12B, 13B, and 14B and annular coils 31, 32, and 33. The stator 20B includes stator cores 21, 22B, 23B, and 24B and annular coils 41, 42, and 43.

  Here, the claw poles of the same polarity of the unit rotors constituting the rotor 10B are displaced in the circumferential direction by α = 60 ° in electrical angle. The claw pole of the same polarity of each unit stator constituting the stator 20 is displaced in the circumferential direction by β = −60 ° in electrical angle (β / M = −5 ° in mechanical angle). Therefore, unlike the embodiment shown in FIG. 2, | α−β | = 120 °. That is, as for the attributes of the annular coils 41, 42, 43 of the stator, if the annular coil 41 is U phase, the annular coil 42 is V phase and the annular coil 43 is W phase.

  In this embodiment, since | α−β | = 120 °, the interstage, that is, the U-phase rotor 11 is compared with the case of | α−β | = 60 ° as shown in FIGS. And the V-phase rotor 12 and the degree of magnetic flux leakage between the U-phase stator 21 and the V-phase stator 22 are slightly increased. Nevertheless, the output torque can be increased because non-uniformity of magnetic flux can be improved as compared to the case where a single claw pole type rotor is used instead of three rotors stacked.

  Also in this embodiment, the non-uniformity of the magnetic flux between the rotor and the stator can be improved, the magnetic flux can be made uniform, and the output torque can be increased.

  In addition, since the length of the claw portion of the claw pole of the claw pole in the rotation axis direction can be shortened, the rotor core can be made thin and thin in the radial direction. Such a mechanism unit can be arranged.

Next, the structure of the rotating electrical machine according to the fourth embodiment of the present invention will be described with reference to FIG. The overall configuration of the rotating electrical machine according to the present embodiment is the same as that shown in FIG.
FIG. 10 is an exploded perspective view showing the configuration of the rotor and the stator used in the rotating electrical machine according to the fourth embodiment of the present invention.

  The rotor 10 </ b> C includes rotor cores 11, 12 </ b> C, 13 </ b> C, 14 </ b> C and annular coils 31, 32, 33. The stator 20 </ b> C includes stator cores 21, 22 </ b> C, 23 </ b> C, and 24 </ b> C and annular coils 41, 42, and 43.

  Here, the claw poles of the same polarity of the unit rotors constituting the rotor 10C are aligned in the circumferential direction as in the example of FIG. 8, and α = 0 °. The claw poles of the same polarity of the unit stators constituting the stator 20 are displaced in the circumferential direction by β = −120 ° in electrical angle. Therefore, as in the embodiment shown in FIG. 9, | α−β | = 120 °. That is, as for the attributes of the annular coils 41, 42, 43 of the stator, if the annular coil 41 is U phase, the annular coil 42 is V phase and the annular coil 43 is W phase.

  In this embodiment, since | α−β | = 120 °, the interstage, that is, the U-phase rotor 11 is compared with the case of | α−β | = 60 ° as shown in FIGS. And the V-phase rotor 12 and the degree of magnetic flux leakage between the U-phase stator 21 and the V-phase stator 22 are slightly increased. Nevertheless, the output torque can be increased because non-uniformity of magnetic flux can be improved as compared to the case where a single claw pole type rotor is used instead of three rotors stacked.

  Also in this embodiment, the non-uniformity of the magnetic flux between the rotor and the stator can be improved, the magnetic flux can be made uniform, and the output torque can be increased.

  In addition, since the length of the claw portion of the claw pole of the claw pole in the rotation axis direction can be shortened, the rotor core can be made thin and thin in the radial direction. Such a mechanism unit can be arranged.

Next, the structure of the rotating electrical machine according to the fifth embodiment of the present invention will be described with reference to FIG. The overall configuration of the rotating electrical machine according to the present embodiment is the same as that shown in FIG.
FIG. 11 is an exploded perspective view showing the configuration of the rotor and the stator used in the rotating electrical machine according to the fifth embodiment of the present invention.

  In the present embodiment, the rotor 10D includes a U-phase unit rotor 10U, a W-phase unit rotor 10W, and a V-phase unit rotor 10V. The configuration of each unit rotor 10U, 10V, 10W is as shown in FIG. The stator 20D includes a U-phase unit stator 20U, a W-phase unit stator 20W, and a V-phase unit stator 20V. The configuration of each unit stator 20U, 20V, 20W is as shown in FIG.

  Here, three unit rotors 10U, 10W, and 10V are juxtaposed in the direction of the rotation axis of the rotating electrical machine, and a magnetic air gap MGA1 is formed between the unit rotor 10U and the unit rotor 10W. A magnetic air gap MGA2 is formed between the rotor 10W and the unit rotor 10V. The magnetic gaps MGA1 and MGA2 are gaps with a gap length of about 1 mm, for example. In addition, a nonmagnetic material made of a resin material such as varnish may be filled between the gaps.

  Further, three unit stators 20U, 20W, and 20V are juxtaposed in the direction of the rotating shaft of the rotating electrical machine, and a magnetic gap MGA1 is formed between the unit stator 20U and the unit stator 20W. A magnetic air gap MGA2 is formed between 20W and the unit stator 20V. The magnetic gaps MGA1 and MGA2 are gaps with a gap length of about 1 mm, for example. In addition, a nonmagnetic material made of a resin material such as varnish may be filled between the gaps.

  As described above, by providing a magnetic gap between the unit rotors of the rotor and between the unit stators of the stator, the leakage of magnetic flux between stages can be reduced, and thus the output torque can be increased. .

  Also in this embodiment, the non-uniformity of the magnetic flux between the rotor and the stator can be improved, the magnetic flux can be made uniform, and the output torque can be increased.

  In addition, since the length of the claw portion of the claw pole of the claw pole in the rotation axis direction can be shortened, the rotor core can be made thin and thin in the radial direction. Such a mechanism unit can be arranged.

Next, the structure of the rotating electrical machine according to the sixth embodiment of the present invention will be described with reference to FIG. The overall configuration of the rotating electrical machine according to the present embodiment is the same as that shown in FIG.
FIG. 12 is an exploded perspective view showing the configuration of the rotor and the stator used in the rotating electrical machine according to the sixth embodiment of the present invention.

  In the present embodiment, the rotor 10E includes a U-phase unit rotor 10U, a W-phase unit rotor 10W, and a V-phase unit rotor 10V. The configuration of each unit rotor 10U, 10V, 10W is as shown in FIG. The stator 20E includes a U-phase unit stator 20U, a W-phase unit stator 20W, and a V-phase unit stator 20V. The configuration of each unit stator 20U, 20V, 20W is as shown in FIG.

  Here, three unit rotors 10U, 10W, and 10V are juxtaposed in the rotation axis direction of the rotating electrical machine, and a magnetic gap MGA3 is formed between the unit rotor 10U and the unit rotor 10W. A magnetic air gap MGA2 is formed between the rotor 10W and the unit rotor 10V. The magnetic gap MGA3 is a gap with a gap length of about several tens of millimeters, for example. The magnetic gap MGA1 is a gap having a gap length of about 1 mm, for example. Note that a nonmagnetic material made of a resin material such as varnish may be filled between the gaps.

  Each unit stator 20U, 20W, 20V is juxtaposed in the direction of the rotation axis of the rotating electrical machine, and a magnetic gap MGA3 is formed between the unit stator 20U and the unit stator 20W. A magnetic air gap MGA2 is formed between 20W and the unit stator 20V. The magnetic gap MGA3 is a gap with a gap length of about several tens of millimeters, for example. The magnetic gap MGA1 is a gap having a gap length of about 1 mm, for example. In addition, a nonmagnetic material made of a resin material such as varnish may be filled between the gaps.

  Since the magnetic gap MGA3 is a gap of several tens of mm, mechanism parts such as gears can be arranged in the gap.

  As described above, by providing magnetic gaps between the unit rotors of the rotor and between the unit stators of the stator, the leakage of magnetic flux between the stages can be reduced, and thus the output torque can be increased. .

  Also in this embodiment, the non-uniformity of the magnetic flux between the rotor and the stator can be improved, the magnetic flux can be made uniform, and the output torque can be increased.

  In addition, since the length of the claw portion of the claw pole of the claw pole in the rotation axis direction can be shortened, the rotor core can be made thin and thin in the radial direction. Such a mechanism unit can be arranged.

Next, the configuration of the rotating electrical machine according to the seventh embodiment of the present invention will be described with reference to FIGS. 13 and 14. The overall configuration of the rotating electrical machine according to the present embodiment is the same as that shown in FIG.
FIG. 13 is an exploded perspective view showing the configuration of the rotor and the stator used in the rotating electrical machine according to the seventh embodiment of the present invention. FIG. 14 is an exploded view of the main part showing the configuration of the rotor used in the rotating electrical machine according to the seventh embodiment of the present invention.

  The rotor 10 </ b> F includes rotor cores 11, 12, 13, and 14 and annular coils 31, 32, and 33, similarly to the rotor 10 illustrated in FIG. 2. If it demonstrates in contrast with FIG. 1, the U-phase rotor 10U is comprised by the rotor core 11, the half of the rotor core 12, and the annular coil 31. FIG. The remaining half of the rotor core 12, the half of the rotor core 13, and the annular coil 32 constitute a W-phase rotor 10W. Further, the remaining half of the rotor core 13, the rotor core 14, and the annular coil 33 constitute a V-phase rotor 10 </ b> V.

  Furthermore, in this embodiment, the permanent magnet 50 is arrange | positioned between the claw poles 11C and 12C of the mutually different polarity of the rotor 10F. In the present embodiment, permanent magnets 50 are arranged at a total of 72 locations in the entire rotor. The permanent magnet 50 is magnetized in such a direction as to cancel the leakage magnetic field between the claw poles 18. That is, as shown in FIG. 14, when the claw pole 12C has an S pole and the claw pole 11C has an N pole, the permanent magnet 50 positioned between the claw poles 11C and 12C has an S pole on the side in contact with the claw pole 12C. Thus, the side in contact with the claw pole 11C is magnetized so as to have an N pole.

  On the other hand, the stator 20 is the same as the stator 20 shown in FIG. 2, and includes stator cores 21, 22, 23, and 24 and annular coils 41, 42, and 43. If it demonstrates in contrast with FIG. 1, the U-phase stator 20U is comprised by the stator core 21, the half of the stator core 22, and the annular coil 41. FIG. The remaining half of stator core 22, half of stator core 23, and annular coil 42 constitute W-phase stator 20W. Further, the remaining half of the stator core 23, the stator core 24, and the annular coil 43 constitute a V-phase stator 20V.

  In the present embodiment, a permanent magnet magnetized in such a direction as to cancel the leakage magnetic field between the claw poles 11C and 12C is disposed between the claw poles of different polarities, so that the leakage magnetic flux between stages can be reduced and the output can be reduced. Torque can be increased.

  Here, when the rotor cores 11, 12, 13, and 14 are manufactured with a dust core, the permanent magnet 50 is manufactured with a bonded magnet and compression molded with any one of the rotor cores 11, 12, 13, and 14 in two colors. Thus, productivity can be improved.

  Also in this embodiment, the non-uniformity of the magnetic flux between the rotor and the stator can be improved, the magnetic flux can be made uniform, and the output torque can be increased.

  In addition, since the length of the claw portion of the claw pole of the claw pole in the rotation axis direction can be shortened, the rotor core can be made thin and thin in the radial direction. Such a mechanism unit can be arranged.

  Furthermore, productivity can be improved by two-color compression molding of the rotor core and the permanent magnet.

Next, the structure of the rotating electrical machine according to the eighth embodiment of the present invention will be described with reference to FIG. The overall configuration of the rotating electrical machine according to the present embodiment is the same as that shown in FIG.
FIG. 15 is an exploded perspective view showing the configuration of the rotor and the stator used in the rotating electrical machine according to the eighth embodiment of the present invention.

  The rotor 10G includes rotor cores 11G, 12G, 13G, and 14G and annular coils 31, 32, and 33, similarly to the rotor 10 shown in FIG. Referring to FIG. 1, the U-phase rotor 10 </ b> U is configured by the rotor core 11 </ b> G, half of the rotor core 12 </ b> G, and the annular coil 31. The remaining half of the rotor core 12G, the half of the rotor core 13G, and the annular coil 32 constitute a W-phase rotor 10W. Furthermore, the remaining half of the rotor core 13G, the rotor core 14G, and the annular coil 33 constitute a V-phase rotor 10V. In the present embodiment, unlike the example of FIG.

  Furthermore, in this embodiment, the permanent magnet 50 is arrange | positioned between the claw poles of mutually different polarity of the rotor 10G. In the present embodiment, permanent magnets 50 are arranged at a total of 36 locations in the entire rotor. The permanent magnet 50 is magnetized in such a direction as to cancel the leakage magnetic field between the claw poles.

  On the other hand, the stator 20G is composed of stator cores 21G, 22G, 23G, and 24G and annular coils 41, 42, and 43, similarly to the stator 20 shown in FIG. Referring to FIG. 1, the U-phase stator 20 </ b> U is configured by the stator core 21 </ b> G, half of the stator core 22 </ b> G, and the annular coil 41. The remaining half of the stator core 22G, half of the stator core 23G, and the annular coil 42 constitute a W-phase stator 20W. Furthermore, the remaining half of the stator core 23G, the stator core 24G, and the annular coil 43 constitute a V-phase stator 20V. In this embodiment, unlike the example of FIG. 2, the number of magnetic poles of the stator is 12. The number of magnetic poles is appropriately selected from the required rotational speed, torque, power supply voltage, and the like.

  In this embodiment, a permanent magnet magnetized in a direction that cancels the leakage magnetic field between the claw poles is arranged between the claw poles of different polarities, so that the leakage magnetic flux between stages can be reduced and the output torque is increased. can do.

  Here, when manufacturing a rotor core with a powder magnetic core, productivity can be improved by manufacturing the permanent magnet 50 with a bonded magnet and compression-molding with one of the rotor cores in two colors.

  Also in this embodiment, the non-uniformity of the magnetic flux between the rotor and the stator can be improved, the magnetic flux can be made uniform, and the output torque can be increased.

  In addition, since the length of the claw portion of the claw pole of the claw pole in the rotation axis direction can be shortened, the rotor core can be made thin and thin in the radial direction. Such a mechanism unit can be arranged.

Next, the structure of the rotating electrical machine according to the ninth embodiment of the present invention will be described with reference to FIG. The overall configuration of the rotating electrical machine according to the present embodiment is the same as that shown in FIG.
FIG. 16 is an exploded perspective view showing the configuration of the rotor and the stator used in the rotating electrical machine according to the ninth embodiment of the present invention.

  The rotor 10H is composed of rotor cores 11H, 12H, 13H, and 14H and annular coils 31, 32, and 33, similarly to the rotor 10 shown in FIG. Referring to FIG. 1, the U-phase rotor 10U is configured by the rotor core 11H, half of the rotor core 12H, and the annular coil 31. The remaining half of the rotor core 12H, the half of the rotor core 13H, and the annular coil 32 constitute a W-phase rotor 10W. Further, the remaining half of the rotor core 13H, the rotor core 14H, and the annular coil 33 constitute a V-phase rotor 10V. In this embodiment, unlike the example of FIG. 2, the number of magnetic poles of the rotor is 48.

  Furthermore, in this embodiment, the permanent magnet 50 is arrange | positioned between the claw poles of mutually different polarity of the rotor 10H. In this embodiment, permanent magnets 50 are arranged at a total of 144 locations in the entire rotor. The permanent magnet 50 is magnetized in such a direction as to cancel the leakage magnetic field between the claw poles.

  On the other hand, the stator 20H is composed of stator cores 21H, 22H, 23H, and 24H and annular coils 41, 42, and 43, similarly to the stator 20 shown in FIG. Referring to FIG. 1, the U-phase stator 20U is configured by the stator core 21H, half of the stator core 22H, and the annular coil 41. The remaining half of the stator core 22H, half of the stator core 23H, and the annular coil 42 constitute a W-phase stator 20W. Further, the remaining half of the stator core 23H, the stator core 24H, and the annular coil 43 constitute a V-phase stator 20V. In the present embodiment, unlike the example of FIG. 2, the number of magnetic poles of the stator is 48. The number of magnetic poles is appropriately selected from the required number of rotations, torque, power supply voltage, and the like.

  In this embodiment, a permanent magnet magnetized in a direction that cancels the leakage magnetic field between the claw poles is arranged between the claw poles of different polarities, so that the leakage magnetic flux between stages can be reduced and the output torque is increased. can do.

  Here, when manufacturing a rotor core with a powder magnetic core, productivity can be improved by manufacturing the permanent magnet 50 with a bonded magnet and compression-molding with one of the rotor cores in two colors.

  Also in this embodiment, the non-uniformity of the magnetic flux between the rotor and the stator can be improved, the magnetic flux can be made uniform, and the output torque can be increased.

  In addition, since the length of the claw portion of the claw pole of the claw pole in the rotation axis direction can be shortened, the rotor core can be made thin and thin in the radial direction. Such a mechanism unit can be arranged.

Next, the configuration of an electric drive system of a hybrid electric vehicle that is one of electric vehicles using a rotating electric machine according to each embodiment of the present invention will be described with reference to FIG.
FIG. 17 is a block diagram showing an electric drive system of a hybrid electric vehicle which is one of electric vehicles using a rotating electric machine according to each embodiment of the present invention.

  In the figure, reference numeral 100 denotes a rotating electrical machine, which includes a speed reducer and a differential device in addition to the rotating electrical machines shown in FIGS. 1 and 2 or FIGS. 8 to 13, 15, and 16.

  The hybrid electric vehicle according to the present embodiment is configured to drive a front wheel WH-F by an engine EN which is an internal combustion engine and a motor / generator MG, and to drive a rear wheel WH-R by an electric motor of the rotating electrical machine 100, respectively. Of the formula. In the present embodiment, the case where the front wheel WH-F is driven by the engine EN and the motor / generator MG and the rear wheel WH-R is driven by the electric motor of the rotating electrical machine 100 will be described. However, the engine EN and the motor / generator MG The rear wheels WH-R may be driven by the electric motor of the rotating electrical machine 100, respectively.

  A transmission TM is mechanically connected to the front wheel axle DS-F of the front wheel WH-F via a differential (not shown). An engine EN and a motor / generator MG are mechanically connected to the transmission TM via an output control mechanism (not shown). The output control mechanism (not shown) is a mechanism that controls composition and distribution of rotation outputs. The AC side of the inverter INV is electrically connected to the stator winding of the motor / generator MG. The inverter INV is a power conversion device that converts DC power into three-phase AC power, and controls driving of the motor / generator MG. A battery BA is electrically connected to the DC side of the inverter INV.

  The end of the output shaft of the differential device of the rotating electrical machine 100 is mechanically connected to the rear wheel axles DS-R1 and DS-R2 of the rear wheel WH-R. The AC side of the inverter INV is electrically connected to the stator winding of the electric motor of the rotating electric machine 100. Here, the inverter INV is commonly used for the motor / generator MG and the electric motor of the rotating electrical machine 100, and the conversion circuit unit for the motor / generator MG, the conversion circuit unit of the electric motor of the rotating electrical machine 100, and driving them. And a drive control unit.

  When the hybrid electric vehicle starts up and travels at a low speed (traveling region in which the operating efficiency (fuel consumption) of the engine EN decreases), the front wheel WH-F is driven by the motor / generator MG. In the present embodiment, the case where the front wheel WH-F is driven by the motor / generator MG at the start of the hybrid electric vehicle 5 and at low speed traveling will be described. However, the front wheel WH-F is driven by the motor / generator MG, The rear wheel WH-R may be driven by the electric motor of the rotating electrical machine 100 (four-wheel drive traveling may be performed). The inverter INV is supplied with DC power from the battery BA. The supplied DC power is converted into three-phase AC power by the inverter INV. The three-phase AC power thus obtained is supplied to the stator winding of the motor / generator MG. As a result, the motor / generator MG is driven to generate a rotational output. This rotational output is input to the transmission TM via an output control mechanism (not shown). The input rotation output is shifted by the transmission TM and input to a differential (not shown). The input rotation output is distributed to the left and right by a differential (not shown) and transmitted to the front wheel axle DS-F on one of the front wheels WH-F and the front wheel axle DS-F on the other of the front wheels WH-F. Thereby, the front wheel axle DS-F is rotationally driven. Then, the front wheels WH-F are rotationally driven by the rotational driving of the front wheel axle DS-F.

  During normal driving of the hybrid electric vehicle (a driving region where the driving efficiency (fuel efficiency) of the engine EN is good when driving on a dry road surface), the front wheels WH-F are driven by the engine EN. For this reason, the rotational output of the engine EN is input to the transmission TM via an output control mechanism (not shown). The input rotation output is shifted by the transmission TM. The shifted rotational output is transmitted to the front wheel axle DS-F via a differential (not shown). Thereby, the front wheel WH-F is rotationally driven. Further, when it is necessary to charge the battery BA by detecting the state of charge of the battery BA, the rotational output of the engine EN is distributed to the motor / generator MG via an output control mechanism (not shown). MG is driven to rotate. As a result, the motor / generator MG operates as a generator. By this operation, three-phase AC power is generated in the stator winding of the motor / generator MG. The generated three-phase AC power is converted into predetermined DC power by the inverter INV. The DC power obtained by this conversion is supplied to the battery BA. Thereby, the battery BA is charged.

  During the four-wheel drive driving of the hybrid electric vehicle (when traveling on a low μ road such as a snowy road and the driving efficiency (fuel consumption) of the engine EN is good), the rear wheel WH− is driven by the electric motor of the rotating electrical machine 100. Drive R. Further, the front wheel WH-F is driven by the engine 1 in the same manner as in the normal running. Further, since the amount of electricity stored in the battery BA is reduced by driving the electric motor of the rotating electrical machine 100, the motor / generator MG is driven to rotate by the rotational output of the engine EN to charge the battery BA, as in the normal running. In order to drive the rear wheel WH-R by the electric motor of the rotating electrical machine 100, the inverter INV is supplied with DC power from the battery BA. The supplied DC power is converted into three-phase AC power by the inverter INV, and the AC power obtained by this conversion is supplied to the stator winding of the rotating electrical machine 100. As a result, the electric motor of the rotating electrical machine 100 is driven to generate a rotational output. The generated rotational output is decelerated by the speed reducer of the rotating electrical machine 100 and input to the differential device of the rotating electrical machine 100. The input rotational output is distributed to the left and right by the differential of the rotating electrical machine 100, and the rear wheel axle DS-R1, DS-R2 on one of the rear wheels WH-R and the rear wheel axle DS on the other of the rear wheels WH-R. -R1 and DS-R2, respectively. Thereby, the rear wheel axle DS-F4 is driven to rotate. Then, the rear wheels WH-R are rotationally driven by the rotational driving of the rear wheel axles DS-R1, DS-R2.

  During acceleration of the hybrid electric vehicle, the front wheels WH-F are driven by the engine EN and the motor / generator MG. In this embodiment, the case where the front wheels WH-F are driven by the engine EN and the motor / generator MG during acceleration of the hybrid electric vehicle will be described. However, the front wheels WH-F are driven by the engine EN and the motor / generator MG. The rear wheel WH-R may be driven by the electric motor of the rotating electrical machine 100 (four-wheel drive traveling may be performed). The rotational outputs of the engine EN and the motor / generator are input to the transmission TM via an output control mechanism (not shown). The input rotation output is shifted by the transmission TM. The shifted rotational output is transmitted to the front wheel axle DS-F via a differential (not shown). Thereby, the front wheel WH-F is rotationally driven.

  During regeneration of a hybrid electric vehicle (when depressing the brake, slowing down the accelerator, or decelerating when the accelerator is stopped), the rotational output of the front wheel WH-F is converted to the front wheel axle DS-F, differential. This is transmitted to the motor / generator MG via a device (not shown), the transmission TM, and an output control mechanism (not shown) to drive the motor generator MG for rotation. As a result, the motor / generator MG operates as a generator. By this operation, three-phase AC power is generated in the stator winding of the motor / generator MG. The generated three-phase AC power is converted into predetermined DC power by the inverter INV. The DC power obtained by this conversion is supplied to the battery BA. Thereby, the battery BA is charged. On the other hand, the rotational output of the rear wheel WH-R is transmitted to the electric motor of the rotating electric machine 100 via the rear wheel axle DS-R1, DS-R2, the differential of the rotating electric machine 100, and the reduction gear of the rotating electric machine 100, 100 electric motors are driven to rotate. Thereby, the electric motor of the rotary electric machine 100 operates as a generator. With this operation, three-phase AC power is generated in the stator winding of the electric motor of the rotating electrical machine 100. The generated three-phase AC power is converted into predetermined DC power by the inverter INV. The DC power obtained by this conversion is supplied to the battery BA. Thereby, the battery BA is charged.

  As the motor / generator MG, one having the same configuration as that of the rotating electrical machine 100 can be used. Since the motor / generator MG is disposed between the engine EN and the transmission TM, the configuration of the motor / generator MG is the same as that of the rotating electrical machine 100, so that the rotating electrical machine 100 has no coil end. Therefore, it can be made flatter and can contribute to size reduction.

Next, the configuration of an electric drive system for an electric vehicle which is one of electric vehicles using a rotating electric machine according to each embodiment of the present invention will be described with reference to FIG.
FIG. 18 is a block diagram showing an electric drive system of an electric vehicle that is one of electric vehicles using a rotating electric machine according to each embodiment of the present invention.

  In the figure, reference numeral 100 denotes a rotating electrical machine, which includes a speed reducer and a differential device in addition to the rotating electrical machines shown in FIGS. 1 and 2 or FIGS. 8 to 13, 15, and 16.

  Front wheel axles DS-F1, DS-F2 of the front wheels WH-F are mechanically connected to the end of the output shaft of the differential device of the rotating electrical machine 100. As a result, the output of the electric motor of the rotating electrical machine 100 is transmitted to the front wheel axles DS-F1, DS-F2, and rotationally drives the front wheel axles DS-F1, DS-F2. Then, the front wheels WH-F are rotationally driven by the rotational driving of the front wheel axles DS-F1, DS-F2, and the electric vehicle having the configuration shown in the drawing is driven. In the present embodiment, the case where the front wheel axles DS-F1 and DS-F2 are rotationally driven by the rotating electrical machine 100 and the front wheels WH-F are rotationally driven will be described, but the rear wheel axle 4 is rotationally driven by the rotating electrical machine 100. Then, the rear wheel WH-R may be rotationally driven. The AC side of the inverter INV is electrically connected to the stator winding of the electric motor of the rotating electric machine 100. The inverter INV is a power conversion device that converts DC power into three-phase AC power, and controls the driving of the electric motor of the rotating electrical machine 100. A battery BA is electrically connected to the DC side of the inverter INV.

  When the electric vehicle is powered (when starting, running, accelerating, etc.), the front wheel WH-F is driven by the electric motor of the rotating electrical machine 100. For this reason, DC power is supplied to the inverter INV from the battery BA. The supplied DC power is converted into three-phase AC power by the inverter INV. The three-phase AC power obtained in this way is supplied to the stator winding of the electric motor of the rotating electrical machine 100. As a result, the electric motor of the rotating electrical machine 100 is driven to generate a rotational output. This rotational output is decelerated by the speed reducer of the rotating electrical machine 100 and input to the differential device of the rotating electrical machine 100. The input rotational output is distributed to the left and right by the differential of the rotating electrical machine 100, and the front wheel axles DS-F1, DS-F2 on one of the front wheels WH-F and the front wheel axles DS-F1, DS on the other of the front wheels WH-F. -F2 is transmitted to each. As a result, the front wheel axles DS-F1, DS-F2 are rotationally driven. Then, the front wheels WH-F are rotationally driven by the rotational driving of the front wheel axles DS-F1, DS-F2.

  During regeneration of an electric vehicle (when depressing the brake, depressing the accelerator, or decelerating the accelerator), the rotational output of the front wheels WH-F is output to the front wheel axles DS-F1, DS-F2. , Transmitted to the electric motor of the rotating electric machine 100 through the differential device of the rotating electric machine 100 and the speed reducer of the rotating electric machine 100, and the electric motor of the rotating electric machine 100 is driven to rotate. Thereby, the electric motor of the rotary electric machine 100 operates as a generator. With this operation, three-phase AC power is generated in the stator winding of the electric motor of the rotating electrical machine 100. The generated three-phase AC power is converted into predetermined DC power by the inverter INV. The DC power obtained by this conversion is supplied to the battery BA. Thereby, the battery BA is charged.

  According to the electric machine drive system of this embodiment, since the rotating electric machine described in any of the above-described embodiments, that is, the rotating electric machine having high torque transmission efficiency of the speed reducer is provided, the electric vehicle can be driven efficiently. And the mileage per charge can be improved. In addition, according to the electric drive system of the present embodiment, since a compact rotating electric machine is provided, it is possible to reduce the mounting space on the vehicle, which contributes to the reduction in size, weight and cost of the vehicle. can do.

Next, the configuration of an electric vehicle when the rotating electrical machine according to each embodiment of the present invention is used as an in-wheel motor / generator will be described with reference to FIG.
FIG. 19 is a block diagram showing a configuration of an electric vehicle when the rotating electrical machine according to each embodiment of the present invention is used as an in-wheel motor / generator.

  The vehicle includes a left front wheel WH-FL, a right front wheel WH-FR, a left rear wheel WH-RL, and a right rear wheel WH-RR. Each wheel WH-FL, WH-FR, WH-RL, and WH-RR is provided with rotating electric machines 100FL, 100FR, 100RL, and 100RR used as in-wheel motors / generators. The rotating electrical machines 100FL, 100FR, 100RL, and 100RR include speed reducers provided in the hollow shaft in addition to the rotating electrical machines shown in FIGS. 1 and 2 or FIGS. 8 to 13, 15, and 16. I have.

  At the ends of the output shafts of the reduction gears of the rotating electrical machines 100FL, 100FR, 100RL, 100RR, a left front wheel WH-FL, a right front wheel WH-FR, a left rear wheel WH-RL, and a right rear wheel WH-RR, Mechanically connected. Thereby, the output of the electric motors of the rotating electrical machines 100FL, 100FR, 100RL, and 100RR is transmitted to the left front wheel WH-FL, the right front wheel WH-FR, the left rear wheel WH-RL, and the right rear wheel WH-RR, and rotates them. The electric vehicle having the configuration shown in the figure is driven. The AC side of the inverter INV is electrically connected to the stator windings of the electric motors of the rotating electrical machines 100FL, 100FR, 100RL, and 100RR. The inverter INV is a power conversion device that converts DC power into three-phase AC power, and controls driving of the electric motors of the rotating electrical machines 100FL, 100FR, 100RL, and 100RR. A battery BA is electrically connected to the DC side of the inverter INV.

  When the electric vehicle is powered (starting, running, acceleration, etc.), the front wheels WH-F are driven by the electric motors of the rotating electrical machines 100FL, 100FR, 100RL, and 100RR. For this reason, DC power is supplied to the inverter INV from the battery BA. The supplied DC power is converted into three-phase AC power by the inverter INV. The three-phase AC power obtained in this way is supplied to the stator windings of the electric motors of the rotating electrical machines 100FL, 100FR, 100RL, and 100RR. As a result, the electric motor of the rotating electrical machine 100 is driven to generate a rotational output. This rotational output is decelerated by the reduction gears of the rotating electric machines 100FL, 100FR, 100RL, and 100RR, and the left front wheel WH-FL, the right front wheel WH-FR, the left rear wheel WH-RL, and the right rear wheel WH-RR are rotationally driven. .

  During regeneration of the electric vehicle (when depressing the brake, slowing down the accelerator, or decelerating when the accelerator is stopped), the left front wheel WH-FL, the right front wheel WH-FR, and the left rear wheel WH- The rotational output of the RL and right rear wheel WH-RR is transmitted to the electric motors of the rotating electric machines 100FL, 100FR, 100RL, and 100RR via the reduction gears of the rotating electric machines 100FL, 100FR, 100RL, and 100RR, and the electric rotating machines 100FL, 100FR, and 100RL are transmitted. , 100RR motor is driven to rotate. Thereby, the electric motors of the rotating electrical machines 100FL, 100FR, 100RL, and 100RR operate as generators. By this operation, three-phase AC power is generated in the stator windings of the electric motors of the rotating electrical machines 100FL, 100FR, 100RL, and 100RR. The generated three-phase AC power is converted into predetermined DC power by the inverter INV. The DC power obtained by this conversion is supplied to the battery BA. Thereby, the battery BA is charged.

  According to the electric machine drive system of this embodiment, since the rotating electric machine described in any of the above-described embodiments, that is, the rotating electric machine having high torque transmission efficiency of the speed reducer is provided, the electric vehicle can be driven efficiently. And the mileage per charge can be improved. In addition, according to the electric drive system of the present embodiment, since a compact rotating electric machine is provided, it is possible to reduce the mounting space on the vehicle, which contributes to the reduction in size, weight and cost of the vehicle. can do.

Claims (10)

A rotating electrical machine comprising a stator having a stator core and a stator coil, and a rotor having a rotor core and a rotor coil,
The stator has a configuration in which three claw pole type unit stators are juxtaposed in the direction of the rotation axis of the rotating electrical machine.
The rotor has a configuration in which three claw pole-type unit rotors are juxtaposed in the axial direction of the rotating electrical machine,
The stator coil of the unit stator is an annular coil,
The stator core of the unit stator is
An annular yoke around the rotational axis;
Teeth extending radially from both axial ends of the annular yoke;
It is provided at the tip of the teeth, and consists of a claw pole that is alternately magnetized with different polarities in the circumferential direction when the annular coil is energized,
The rotor coil of the unit rotor is an annular coil,
The rotor core of the unit rotor is
An annular yoke around the rotational axis;
Teeth extending radially from both axial ends of the annular yoke;
A rotating electrical machine comprising: a claw pole provided at a tip of the teeth and alternately magnetized in the circumferential direction with different polarities when the annular coil is energized. The rotating electrical machine according to claim 1, wherein
Of the three unit rotors juxtaposed, the claw pole positions of the same polarity of the adjacent unit rotors are displaced in the circumferential direction by an electrical angle of α °,
Among the three unit stators juxtaposed, the claw pole positions of the adjacent unit stators are displaced in the circumferential direction by β ° in electrical angle,
Here, | α−β | = 60 °. The rotating electrical machine according to claim 1, wherein
Among the three unit rotors juxtaposed, the claw pole positions of the same polarity of the adjacent unit rotors are displaced in the circumferential direction by an electrical angle of α °,
Among the three unit stators juxtaposed, the claw pole positions of the adjacent unit stators are displaced in the circumferential direction by β ° in electrical angle,
Here, | α−β | = 120 °. In the rotating electrical machine according to any one of claims 2 and 3,
A rotating electrical machine characterized by α + β = 0. The rotating electrical machine according to claim 4,
A rotating electrical machine, wherein α = 30, β = −30, or α = −30, β = 30. The rotating electrical machine according to claim 1, wherein
The rotating electrical machine according to claim 1, further comprising a magnetic gap provided between the adjacent unit blocks when the opposing unit rotor and the unit stator are unit blocks. The rotating electrical machine according to claim 1, wherein
The rotating electric machine according to claim 1, wherein the claw pole of the rotor and the claw pole of the stator are made of a dust core. The rotating electrical machine according to claim 1, wherein
Each of the unit rotors is disposed between claw poles having different polarities, and includes a permanent magnet that is magnetized in such a direction as to cancel a leakage magnetic field between the claw poles. The rotating electrical machine according to claim 8, wherein
The permanent magnet is composed of a bonded magnet,
The claw pole is made of a dust core,
The rotating electric machine, wherein the permanent magnet and the claw pole are compression molded in two colors. An in-vehicle rotating electrical machine system having a rotating electrical machine that generates vehicle driving force or in-vehicle accessory driving force, and an inverter that controls electric power supplied to the rotating electrical machine,
The rotating electrical machine includes a stator having a stator core and a stator coil, and a rotor having a rotor core and a rotor coil.
The stator has a configuration in which three claw pole type unit stators are juxtaposed in the direction of the rotation axis of the rotating electrical machine.
The rotor has a configuration in which three claw pole-type unit rotors are juxtaposed in the axial direction of the rotating electrical machine,
The stator coil of the unit stator is an annular coil,
The stator core of the unit stator is
An annular yoke around the rotational axis;
Teeth extending radially from both axial ends of the annular yoke;
It is provided at the tip of the teeth, and consists of a claw pole that is alternately magnetized with different polarities in the circumferential direction when the annular coil is energized,
The rotor coil of the unit rotor is an annular coil,
The rotor core of the unit rotor is
An annular yoke around the rotational axis;
Teeth extending radially from both axial ends of the annular yoke;
An in-vehicle rotating electrical machine system comprising: a claw pole provided at a tip of the teeth and alternately magnetized with different polarities in a circumferential direction when the annular coil is energized.

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