JP2010183648A - Permanent magnet rotary electric machine and electric vehicle using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a permanent magnet rotary electric machine capable of reducing a cogging torque or a torque ripple and having a small number of parts, and to provide an electric vehicle using the rotary electric machine. <P>SOLUTION: The permanent magnet rotary electric machine 1 has a stator 2 having a stator core 4 having a plurality of stator salient poles 22 protruding from an annular yoke 21 in a diameter direction and a stator winding 5 wound around the stator core 4, and a rotor 3 arranged oppositely to the stator 2 via a gap and having a stator core 7 and a plurality of permanent magnets 6 arranged inside the rotor core 7. In the rotary electric machine 1, the rotor 3 has a plurality of cores in which the shape of the core of a portion where a magnetic pole is magnetically effective is identical in the circumferential direction and shaft direction, and there are a plurality of distances between an end of the circumferential direction of permanent magnets 6 disposed in a magnet insertion hole 12 of the magnetic pole and an end in the circumferential direction of the permanent magnets 6 disposed in an adjacent magnetic pole. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a permanent magnet rotating electric machine and an electric vehicle using the same, and more particularly to a permanent magnet rotating electric machine suitable for a built-in magnet rotating electric machine and an electric vehicle using the same.

  Generally, a brushless motor using a permanent magnet rotor is used as a rotating electrical machine that drives an electric vehicle.

  In the conventional brushless motor, it is necessary to reduce cogging torque and torque pulsation caused by a change in the attractive force between the salient pole of the stator core of the brushless motor and the rotor. Therefore, a configuration is known in which the rotor magnet is divided in the axial direction and the magnetic poles are shifted in the circumferential direction (see, for example, Patent Document 1).

JP 2004-180491 A

  However, in the above configuration, since the permanent magnet piece is divided in the axial direction, there are problems that the number of parts of the magnet is increased and work efficiency at the time of manufacture is extremely lowered.

  In the permanent magnet rotating electrical machine as described above, if the torque pulsation is to be reduced, there is a problem that the number of permanent magnet pieces to be used increases and the number of parts increases. In a rotating electrical machine used for an electric vehicle, the number of parts is small and low torque pulsation is required.

  An object of the present invention is to provide a permanent magnet rotating electric machine that can reduce cogging torque or torque pulsation and has a small number of parts, and an electric vehicle using the same.

  The present invention relates to a stator core having a plurality of teeth cores projecting radially from an annular yoke core, a stator having a stator winding wound around the stator core, and a gap in the stator. A permanent magnet rotating electrical machine having a rotor core and a rotor having a plurality of permanent magnet pieces disposed inside the rotor core, the rotor being magnetically effective for the magnetic poles Permanent cores arranged on adjacent magnetic poles from the circumferential ends of the permanent magnet pieces arranged in the magnet insertion holes of the magnetic poles. A permanent magnet rotating electrical machine in which a plurality of distances from the circumferential end of a magnet piece exist.

  ADVANTAGE OF THE INVENTION According to this invention, a cogging torque or torque pulsation can be reduced, and a permanent magnet rotary electric machine with a small number of parts and an electric vehicle using the same can be provided.

It is the fragmentary sectional view seen from the front side of the permanent magnet rotary electric machine which makes one Example of this invention. It is sectional drawing of the permanent magnet rotary electric machine of FIG. FIG. 2 is a control circuit diagram of the permanent magnet rotating electric machine of FIG. 1. It is sectional drawing of the permanent magnet rotary electric machine which makes 2nd Example of this invention. It is sectional drawing of the permanent magnet rotary electric machine which makes 3rd Example of this invention. It is a block block diagram of the electric vehicle carrying the permanent magnet rotary electric machine which makes 4th Example of this invention.

  The present embodiment relates to a permanent magnet rotating electric machine and an electric vehicle using the same, and particularly to a permanent magnet rotating electric machine suitable for a built-in magnet type rotating electric machine and an electric vehicle using the same.

  A first embodiment of the present invention will be described with reference to FIGS. First, the configuration of the permanent magnet rotating electrical machine 1 according to the present embodiment will be described with reference to FIGS.

  In FIG. 1, a stator 2 of a permanent magnet rotating electrical machine 1 includes a stator core 4, a multiphase stator winding 5 wound around the stator core 2, and an inner peripheral surface of the stator core 4. It is comprised from the housing 11 fixed to and hold | maintaining. In the rotor 3, a rotor core 4, a permanent magnet 6 inserted in a permanent magnet insertion hole 12 provided in the rotor core 4, and a shaft 8 are rotatably held by a bearing 10. The bearing 8 is supported by an end bracket 9, and the end bracket 9 is fixed to both ends of the housing 11.

  A magnetic pole position detector PS that detects the position of the permanent magnet 6 of the rotor 3 and an encoder E that detects the position of the rotor 3 are disposed on the side surface side of the rotor 3. The permanent magnet rotating electrical machine 1 is operated and controlled by a control device (to be described later with reference to FIG. 3) based on the signal from the magnetic pole position detector PS and the output signal from the encoder E.

  FIG. 2 is a sectional view of the permanent magnet rotating electric machine, but the illustration of the housing is omitted. In FIG. 2, the permanent magnet rotating electrical machine 1 includes a stator 2 and a rotor 3. The stator 2 includes a stator core 4 and a stator winding 5. The stator winding 5 is wound around the stator winding 4.

  The stator core 4 protrudes radially inward from the cylindrical yoke portion 21 (or core back portion) and the inner peripheral surface of the yoke portion 21, and extends in the axial direction along the inner peripheral surface of the yoke portion 21. A plurality of stator salient poles 22 (or teeth portions) are provided. The stator salient poles 22 are arranged at equal intervals in the circumferential direction along the inner peripheral surface of the yoke portion 21.

  The rotor core 7 of the rotor 3 is a high permeability magnetic material. For example, the rotor core 7 in which a plurality of electromagnetic steel sheets are laminated and the plurality of permanent magnets 6 inserted into the plurality of permanent magnet insertion holes 12 provided in the rotor core 7 are opposite in polarity. It arrange | positions in the circumferential direction of the rotor core 7 so that it may become a direction.

  The rotor core 7 has a structure in which a hole through which the permanent magnet insertion hole 12 and the shaft 8 are passed is punched out. The holes through which the permanent magnet insertion hole 12 and the shaft 8 are passed are punched out to laminate the magnetic steel plates, and the permanent magnet 6 and the shaft 8 are inserted into the through holes through which the permanent magnet insertion hole 12 and the shaft 8 pass. Constitute.

  The rotor 3 rotates clockwise and counterclockwise, and operates as an electric motor. The shape of the permanent magnet 6 to be used is a rectangular parallelepiped shape.

  When the rotor core 4 is divided in the radial direction, it is divided into an inner peripheral yoke portion 31 and an outer peripheral portion 32. Further, when the outer peripheral portion 32 of the rotor core 4 is divided into two in the circumferential direction, it is divided into an auxiliary magnetic pole portion 33 and a magnetic pole piece portion 34. The auxiliary magnetic pole portion 33 is a region sandwiched between adjacent permanent magnet insertion holes 12, and is a region that bypasses the magnetic circuit of the magnet and generates a magnetic flux directly on the stator 2 side by the magnetomotive force of the stator 2. The magnetic pole piece 34 is a region located on the outer peripheral side of the permanent magnet 6 in the outer peripheral portion 32 of the rotor core 4, and the magnetic flux Bφ from the permanent magnet 6 flows to the stator 2 side through the gap. This is a region constituting a magnetic circuit.

  The permanent magnet 6 can be accommodated in the permanent magnet insertion hole 12 whose circumferential direction is covered by the auxiliary magnetic pole portion 33 and whose outer peripheral side is covered by the magnetic pole piece portion 34, and is an electric motor suitable for high-speed rotation. Can do.

  Here, there are two or more types of distances between the end portions of the permanent magnet inserted into the permanent magnet insertion hole of the magnetic pole adjacent to the permanent magnet 6 inserted into the permanent magnet insertion hole 12 (see FIG. 3). In the case of the example, two types of θs1 and θs2).

  Except for the area of the permanent magnet 6 in the permanent magnet insertion hole 16, a gap 35 is formed. Since the air gap 35 is a member having a small magnetic resistance compared to the rotor core, there is less magnetic leakage from this, and the magnetic flux of the permanent magnet 6 can be used effectively, so the amount of magnets used can be reduced. The centrifugal force of the permanent magnet 6 applied to the auxiliary magnetic pole part 33 and the magnetic pole piece part 34 is reduced, and a structure suitable for high-speed rotation can be obtained.

  The air gap 35 functions even if it is a space where air exists or has a smaller magnetic resistance than that of the rotor core, but instead of air, it is filled with a non-magnetic part such as a varnish. Can be structurally strong.

  According to the above embodiment, since the distance between the end portions of the permanent magnet inserted into the permanent magnet insertion hole of the magnetic pole adjacent to the permanent magnet 6 inserted into the permanent magnet insertion hole 12 is different. The center value of the magnetic pole is spatially different from the maximum value of the fundamental wave of the magnetic flux created by the permanent magnet 6 in the gap. Since the maximum value of the fundamental wave of the magnetic flux produced in the gap by the permanent magnet 6 adjacent to the magnetic pole is different from the center position of the magnetic pole and is positioned in a direction opposite to the circumferential direction of the magnetic pole, Since the rotor magnet is divided in the axial direction and the configuration in which the magnetic poles are shifted in the circumferential direction is the same as that developed in the circumferential direction, the main harmonic component of torque pulsation can be canceled and cogging Torque and torque pulsation can be reduced.

  Next, a method for controlling the permanent magnet rotating electric machine according to the embodiment will be described with reference to FIG.

  Power is supplied from the DC power supply 50 to the stator winding 5 of the permanent magnet rotating electrical machine 1 through the inverter 51. The speed control circuit (ASR) 52 outputs a torque command, that is, a current command Is and a rotation angle θ1 of the rotor 3 based on the speed command ωs and position information from the encoder E.

  The phase shift circuit 53 outputs a pulse from the encoder E, that is, the position information θ of the rotor 3 by shifting the phase according to the command of the rotation angle θ 1 from the speed control circuit 52. The sine wave / cosine wave generation circuit 54 is based on the position detection PS for detecting the magnetic pole position of the permanent magnet 6 of the rotor 3 and the position information θ of the phase shifted rotor from the phase shift circuit 53. A sine wave output is generated by shifting the induced voltage of each winding of the winding 5 in phase. The phase shift amount may be zero.

  The two-phase / three-phase conversion circuit 55 outputs current commands Isu, Isv, Isw to each phase according to the current command IS from the speed control circuit (ASR) 52 and the output of the sine / cosine generation circuit 54. Each phase has a current control system (ACR) 56a, 56b, 56c individually, and signals corresponding to the current commands Isu, Isv, Isw and the current detection signals Ifu, Ifv, Ifw from the current detector 57 are sent to the inverter 51. To control each phase current. In this case, the current of each phase combination is always formed at a position perpendicular to the field magnetic flux or shifted in phase, so that a characteristic equivalent to that of a DC machine can be obtained without a commutator.

  By adopting such a configuration, a skew effect similar to the configuration in which the magnetic poles of the permanent magnet pieces divided in the axial direction are shifted in the circumferential direction can be obtained, and cogging torque and torque pulsation can be reduced.

  Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 4 is a sectional view of a permanent magnet rotating electrical machine according to the second embodiment of the present invention. Here, illustration of the housing and the stator 2 is omitted. The entire structure of the permanent magnet rotating electric machine according to the present embodiment is as shown in FIG. 1, and the stator of the permanent magnet rotating electric machine is as shown in FIG.

  The rotor core 7 of the rotor 3 is a high permeability magnetic material. For example, the rotor core 7 in which a plurality of electromagnetic steel sheets are laminated and the plurality of permanent magnets 6 inserted into the plurality of permanent magnet insertion holes 12 provided in the rotor core 7 are opposite in polarity. It arrange | positions in the circumferential direction of the rotor core 7 so that it may become a direction.

  The rotor core 7 has a structure in which a hole through which the permanent magnet insertion hole 12 and the shaft 8 are passed is punched out. The holes through which the permanent magnet insertion hole 12 and the shaft 8 are passed are punched out to laminate the magnetic steel plates, and the permanent magnet 6 and the shaft 8 are inserted into the through holes through which the permanent magnet insertion hole 12 and the shaft 8 pass. Constitute.

  The rotor 3 rotates clockwise and counterclockwise, and operates as an electric motor. The shape of the permanent magnet 6 to be used is a rectangular parallelepiped shape.

  When the rotor core 4 is divided in the radial direction, it is divided into an inner peripheral yoke portion 31 and an outer peripheral portion 32. Further, when the outer peripheral portion 32 of the rotor core 4 is divided into two in the circumferential direction, it is divided into an auxiliary magnetic pole portion 33 and a magnetic pole piece portion 34. The auxiliary magnetic pole portion 33 is a region sandwiched between adjacent permanent magnet insertion holes 12, and is a region that bypasses the magnetic circuit of the magnet and generates a magnetic flux directly on the stator 2 side by the magnetomotive force of the stator 2. The magnetic pole piece 34 is a region located on the outer peripheral side of the permanent magnet 6 in the outer peripheral portion 32 of the rotor core 4, and the magnetic flux Bφ from the permanent magnet 6 flows to the stator 2 side through the gap. This is a region constituting a magnetic circuit.

  The permanent magnet 6 can be accommodated in the permanent magnet insertion hole 12 whose circumferential direction is covered by the auxiliary magnetic pole portion 33 and whose outer peripheral side is covered by the magnetic pole piece portion 34, and is an electric motor suitable for high-speed rotation. Can do.

  Here, there are two or more types of distances between the end portions of the permanent magnet inserted into the permanent magnet insertion hole of the magnetic pole adjacent to the permanent magnet 6 inserted into the permanent magnet insertion hole 12.

  Further, the shape of the permanent magnet insertion hole 12 has a shape that is long in the direction perpendicular to the radial direction, and the permanent magnet 6 is inserted into the permanent magnet insertion hole 12, thereby reducing the number of parts. be able to. Further, the same skew effect as the configuration in which the magnetic poles of the permanent magnet pieces divided in the axial direction are shifted in the circumferential direction can be obtained, and cogging torque and torque pulsation can be reduced.

  Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 5 is a cross-sectional view of a permanent magnet rotating electrical machine according to a third embodiment of the present invention. Here, illustration of the housing and the stator 2 is omitted. The entire structure of the permanent magnet rotating electric machine according to the present embodiment is as shown in FIG. 1, and the stator of the permanent magnet rotating electric machine is as shown in FIG.

  The rotor core 7 of the rotor 3 is a high permeability magnetic material. For example, the rotor core 7 in which a plurality of electromagnetic steel sheets are laminated and the plurality of permanent magnets 6 inserted into the plurality of permanent magnet insertion holes 12 provided in the rotor core 7 are opposite in polarity. It arrange | positions in the circumferential direction of the rotor core 7 so that it may become a direction.

  The rotor core 7 has a structure in which a hole through which the permanent magnet insertion hole 12 and the shaft 8 are passed is punched out. The holes through which the permanent magnet insertion hole 12 and the shaft 8 are passed are punched out to laminate the magnetic steel plates, and the permanent magnet 6 and the shaft 8 are inserted into the through holes through which the permanent magnet insertion hole 12 and the shaft 8 pass. Constitute.

  The rotor 3 rotates clockwise and counterclockwise, and operates as an electric motor. The shape of the permanent magnet 6 to be used is a rectangular parallelepiped shape.

  When the rotor core 4 is divided in the radial direction, it is divided into an inner peripheral yoke portion 31 and an outer peripheral portion 32. Further, when the outer peripheral portion 32 of the rotor core 4 is divided into two in the circumferential direction, it is divided into an auxiliary magnetic pole portion 33 and a magnetic pole piece portion 34. The auxiliary magnetic pole portion 33 is a region sandwiched between adjacent permanent magnet insertion holes 12, and is a region that bypasses the magnetic circuit of the magnet and generates a magnetic flux directly on the stator 2 side by the magnetomotive force of the stator 2. The magnetic pole piece 34 is a region located on the outer peripheral side of the permanent magnet 6 in the outer peripheral portion 32 of the rotor core 4, and the magnetic flux Bφ from the permanent magnet 6 flows to the stator 2 side through the gap. This is a region constituting a magnetic circuit.

  The permanent magnet 6 can be accommodated in the permanent magnet insertion hole 12 whose circumferential direction is covered by the auxiliary magnetic pole portion 33 and whose outer peripheral side is covered by the magnetic pole piece portion 34, and is an electric motor suitable for high-speed rotation. Can do.

  Here, there are two or more types of distances between the end portions of the permanent magnet inserted into the permanent magnet insertion hole of the magnetic pole adjacent to the permanent magnet 6 inserted into the permanent magnet insertion hole 12.

  The permanent magnet 6 inserted into the permanent magnet insertion hole 12 is arranged such that the center of the magnetic pole and the center of the circumferential length of the permanent magnet 6 are located at the same position, and the permanent magnet insertion hole 12. The magnetic poles of the permanent magnet pieces divided in the axial direction are reduced in the circumferential direction without lowering the torque by mixing the permanent magnets 6 inserted in the magnetic poles with the magnetic poles arranged in the rotational direction or in the reverse rotational direction. A skew effect similar to that of the configuration in which they are shifted to each other can be obtained, and cogging torque and torque pulsation can be reduced.

  In the above description, the permanent magnet rotating electric machine 1 having 18 stator salient poles 22 and 12 permanent magnets 6 and having 12 so-called 12 poles and 18 slots has been described as an example. Furthermore, the present invention can be applied to combinations of the following. Magnetic pole-slot number ratio of 10 poles and 12 slots, pole ratio of 10 poles, 12 slots, magnetic pole-slot number ratio of 8 poles and 9 slots, 8 poles and 9 slots, 2 poles and 3 slots A magnetic pole-slot number having the same ratio as that of the magnetic pole and a slot having two poles and three slots may be used. Other combinations are also possible. A combination of an integer number of stator salient poles 22 and permanent magnets 6 per phase is also possible.

  In the above description, the inner rotation type permanent magnet rotating electric machine has been described. However, the outer rotation type permanent magnet rotating electric machine can also be applied.

  In the above description, the 180-degree energization type permanent magnet rotating electric machine has been described, but it goes without saying that the 120-degree energization type brushless motor system can also be applied. It can also be applied as a generator.

  In the above description, the distributed winding type permanent magnet rotating electric machine has been described. However, a concentrated winding type permanent magnet rotating electric machine can also be applied.

  In the above description, the permanent magnet rotating electric machine of the embedded magnet type in which the permanent magnet 6 is inserted into the permanent magnet insertion hole 12 has been described. However, the surface magnet for attaching the permanent magnet 6 to the air gap side surface of the rotor core 7. It can also be applied to a permanent magnet rotating electric machine of the type.

  Next, an electric vehicle using the permanent magnet rotating electric machine according to the fourth embodiment of the present invention will be described with reference to FIG. FIG. 8 is a block diagram of an electric vehicle equipped with a permanent magnet rotating electrical machine according to the fourth embodiment of the present invention.

  The body 100 of the electric vehicle is supported by four wheels 110, 112, 114, 116. Since this electric vehicle is front-wheel drive, the permanent magnet rotating electrical machine 120 is directly connected to the front axle 154. The driving torque of the permanent magnet rotating electric machine 120 is controlled by the control device 130. As a power source of the control device 130, a battery 140 is provided, and electric power is supplied from the battery 140 to the permanent magnet rotating electrical machine 120 via the control device 130, and the permanent magnet rotating electrical machine 120 is driven to drive the wheels 110, 114 rotates. The rotation of the handle 150 is transmitted to the two wheels 110 and 114 via a transmission mechanism including a steering gear 152, a tie rod, a knuckle arm, and the like, and the angle of the wheel is changed.

  In the above embodiments, the permanent magnet rotating electric machine has been described as being used for driving wheels of an electric vehicle, but can also be used for driving wheels of an electric locomotive or the like.

  According to the present embodiment, if the permanent magnet rotating electrical machine is applied to an electric vehicle, particularly an electric vehicle, a low-torque pulsating permanent magnet rotating electrical machine drive device can be mounted, and an electric vehicle with small torque pulsation can be provided. .

  As described above, an embodiment of the present invention includes a stator having a stator core around which a stator winding is wound, and a rotor having a rotor core that is rotatably held on the inner periphery of the stator. In the configured permanent magnet rotating electrical machine, the rotor has a plurality of magnetic cores having the same shape in the circumferential direction and the axial direction in the magnetically effective portion of the magnetic pole, and is disposed in the magnet insertion hole of the magnetic pole. The distance between the circumferential end of the permanent magnet piece and the circumferential end of the permanent magnet piece disposed on the adjacent magnetic pole has two or more types. With this configuration, cogging torque and torque pulsation can be reduced, and the number of parts can be reduced.

  In the present embodiment, the type of distance from the circumferential end of the permanent magnet piece arranged in the magnet insertion hole of the magnetic pole to the circumferential end of the permanent magnet piece arranged in the adjacent magnetic pole, The same number of different types exists. With this configuration, there is little reduction in torque, cogging torque and torque pulsation can be reduced, and the number of parts can be reduced.

  In the present embodiment, the distance from the circumferential end of the permanent magnet piece arranged in the magnet insertion hole of the magnetic pole to the circumferential end of the permanent magnet piece arranged in the adjacent magnetic pole is alternately A different configuration is used. With this configuration, cogging torque and torque pulsation can be reduced, and the number of parts can be reduced.

  In the present embodiment, the rotor includes a rotor core that is divided into a plurality of parts in the rotation axis direction, and the magnetic pole central portion of the rotor core that is divided into a plurality of parts is shifted in the circumferential direction. is there. With this configuration, there is little reduction in torque, cogging torque and torque pulsation can be reduced, and the number of parts can be reduced.

  Moreover, in this embodiment, it is set as the structure whose shape of the permanent magnet piece inserted in a rotor iron core is a rectangular parallelepiped shape.

  In the above, there are two or more types of distances from the circumferential end of the permanent magnet piece arranged in the magnet insertion hole of the magnetic pole to the circumferential end of the permanent magnet piece arranged in the adjacent magnetic pole. Since the permanent magnet piece is disposed at the center, the harmonic component of the torque pulsation generated by the magnetic resistance of the slot is canceled, so that the torque pulsation can be reduced.

  Thus, according to the present embodiment, the number of parts of the permanent magnet rotating electrical machine can be reduced, and torque pulsation can be further reduced. In an electric vehicle using a permanent magnet rotating electric machine, an electric vehicle with small torque pulsation can be provided.

DESCRIPTION OF SYMBOLS 1 Permanent magnet rotary electric machine 2 Stator 3 Rotor 4 Stator iron core 5 Stator winding 6 Permanent magnet 7 Rotor iron core 12 Permanent magnet hole 21 Stator yoke part 22 Stator salient pole

Claims (7)

A stator core having a plurality of stator salient poles projecting radially from an annular yoke portion, and a stator having a stator winding wound around the stator core;
A rotor having a rotor core and a plurality of permanent magnet pieces disposed inside the rotor core, the rotor core being disposed to face the stator via a gap;
A permanent magnet rotating electric machine having
The rotor has a plurality of magnetic cores having the same shape in the circumferential direction and the axial direction in the magnetically effective portion of the magnetic pole, and the circumferential direction of the permanent magnet piece disposed in the magnet insertion hole of the magnetic pole The permanent magnet rotating electrical machine in which there are a plurality of distances from the end of the magnet to the circumferential end of the permanent magnet piece arranged on the adjacent magnetic pole. The permanent magnet rotating electric machine according to claim 1,
Different types of distances between magnets depending on the distance from the circumferential end of the permanent magnet piece arranged in the magnet insertion hole of the magnetic pole to the circumferential end of the permanent magnet piece arranged in the adjacent magnetic pole There are the same number of permanent magnet rotating electrical machines. The permanent magnet rotating electric machine according to claim 2,
The permanent magnet rotating electrical machine in which the distance from the circumferential end of the permanent magnet piece arranged in the magnet insertion hole of the magnetic pole to the circumferential end of the permanent magnet piece arranged in the adjacent magnetic pole is alternately different . The permanent magnet rotating electric machine according to claim 1,
The rotor includes a rotor core that is divided into a plurality of parts in a rotation axis direction, and a permanent magnet rotating electric machine in which a magnetic pole central portion of the plurality of divided rotor cores is shifted in a circumferential direction. The permanent magnet rotating electric machine according to claim 1,
A permanent magnet rotating electrical machine in which a plurality of the permanent magnet pieces arranged on one magnetic pole of the rotor are arranged.   The permanent magnet rotating electrical machine according to claim 1, wherein the shape of the permanent magnet inserted into the rotor core is a rectangular parallelepiped shape. A stator having a stator core around which a stator winding is wound;
Permanently having a rotor core that is rotatably held on the inner periphery of the stator, and a rotor having a plurality of permanent magnet pieces disposed inside the rotor core so as to face the stator core. An electric vehicle including a magnet rotating electric machine, the wheels of which are driven by the permanent magnet rotating electric machine,
The rotor has a plurality of magnetic cores having the same shape in the circumferential direction and the magnetically effective portion in the axial direction,
Permanent magnet in which there are a plurality of distances between the circumferential end of the permanent magnet piece arranged in the magnet insertion hole of the magnetic pole and the circumferential end of the permanent magnet piece arranged in the adjacent magnetic pole An electric vehicle using a rotating electric machine.

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