JP2006191757A - Rotating electric machine and electric power steering device therewith - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a concentratedly wound permanent magnet rotating electric machine and an electric power steering device capable of attaining crossover shortening, size and weight reductions and high efficiency, by reducing the number of connections of windings between salient magnetic poles, and to provide an electric power steering device therewith. <P>SOLUTION: This rotating electric machine at least contains permanent magnetic poles arranged at prescribed intervals, a permanent magnetic field section formed out of the permanent magnetic poles, salient magnetic poles which are arranged at prescribed intervals and of which quantity is M, armature windings concentratedly wound around the salient magnetic poles and in a poly-phase connection, and armatures with the armature windings. To control current running through the armature windings in accordance with traveling positions of the permanent magnetic field section and to generate torque at the permanent magnetic field section, the number of the permanent magnetic poles P, and the number of the salient magnetic poles M have the following relationship: (2/3)M<P<(4/3)M (however, M≠P). <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a rotating electrical machine, and more particularly to an electric power steering device for a vehicle and for assisting or driving a steering mechanism.

  In order to reduce fuel consumption and improve operability, motorization of operation devices and drive devices in automobiles is being promoted. There is a tendency to adopt a method of an electric system that consumes drive energy only when necessary, compared to a conventional method using hydraulic pressure that always consumes drive energy. Typical examples include a throttle actuator that controls the amount of air, a brake device that controls the braking force, a power steering device that assists or drives the steering mechanism, and an automatic transmission that performs shift control of the transmission. Conventionally, DC machines have been mainly used as the rotating electrical machines used in these, but concentrated winding permanent magnet rotating electrical machines are being used from the viewpoint of miniaturization.

  In this type of concentrated winding permanent magnet rotating electrical machine, it is small and lightweight from the viewpoint of mounting space, is highly efficient to ensure operating time under high load, and has low cogging torque to improve operability. Is required.

  In order to satisfy this requirement, the structure of the rotating electrical machine employs permanent magnets, concentrated windings, and split cores, and can be realized by appropriate selection of the number of poles and salient poles of the permanent magnet. JP-A-62-110468 and JP-A-2003-250254 disclose the technology of this type of concentrated winding permanent magnet rotating electric machine.

  According to these known techniques, the end coil length can be shortened by concentrated winding, and the cogging torque and the magnet eddy current can be reduced by appropriately selecting the number of poles and salient poles of the permanent magnet, It is disclosed that a concentrated winding permanent magnet rotating electric machine with good operability can be obtained.

JP-A-62-110468 JP 2003-250254 A

  According to the above-described known technology, a concentrated winding permanent magnet rotating electric machine can be realized which is reduced in size and weight to some extent and has a low cogging torque, but the conventional salient poles can be connected to the concentrated winding armature winding. Since there are magnetic poles for each armature winding or for each winding belonging to each phase, the number of connection points still remains large, and there are problems such as making further miniaturization and weight reduction and higher efficiency difficult. .

  The present invention relates to a winding connection of armature windings for solving these problems, and an object thereof is a concentrated winding permanent magnet rotating electric machine capable of achieving a small size, light weight and high efficiency by a short jumper wire. The present invention also provides an electric power steering device using the same and having a small size, light weight and good operability.

  Another object of the present invention relates to a concentrated winding permanent magnet rotating electrical machine, and in particular, reduces the number of windings connected between salient poles, shortens the transition, makes it compact, lightweight, and highly efficient. An electric machine and an electric power steering apparatus using the same are provided.

  In order to achieve the above object, the present invention provides a permanent magnet magnetic pole arranged at a predetermined interval, a permanent magnet field portion composed of the permanent magnet magnetic pole, M salient poles arranged at a predetermined interval, The armature winding is concentratedly wound around the salient pole magnetic pole and connected in multiple phases, and has at least an armature having the armature winding, depending on the moving position of the permanent magnet field In order to control the current flowing through the armature winding and generate torque in the permanent magnet field, P, which is the number of poles of the permanent magnet magnetic pole, and pole number M of the salient pole are (2/3). ) M <P <(4/3) M (where M ≠ P).

  Furthermore, the present invention is characterized in that the armature winding is formed by winding one phase of the armature winding and continuously winding the other phase winding.

  Further, the present invention is characterized in that the armature winding is wound so that the circumferential interval between the adjacent armature windings is short at the same phase and is long at the different phase.

  The armature winding has an armature winding in which the thickness of the armature winding in the radial direction is changed at a radial position.

  Further, the concentrated winding permanent magnet rotating electric machine according to the present invention is applied to an electric power steering apparatus.

  According to the present embodiment, the number of windings connected between salient poles is reduced, and there is provided a concentrated winding permanent magnet rotating electric machine having a short transition, a small size, a light weight, and high efficiency, and an electric power steering device using the same. it can.

  Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
The first embodiment of the present invention will be described below.

  FIG. 1 is an embodiment showing a developed connection of salient poles and armature windings of a concentrated winding permanent magnet rotating electric machine according to the present invention.

  FIG. 2 is a cross-sectional view of the concentrated winding permanent magnet rotating electric machine as viewed perpendicular to the axial direction.

  FIG. 3 is a cross-sectional view along the axial direction of the concentrated winding permanent magnet rotating electric machine of the present invention.

  Description will be made with reference to FIGS.

  FIG. 1 particularly shows the salient pole magnetic pole 42 and the armature winding 5 developed in the circumferential direction and shows the connection of the windings. Here, as an embodiment to which the effect of the present invention can be applied most characteristically, an example in which the number of salient poles of the concentrated winding stator is 9 and the number of poles of the permanent magnet rotor is 10 will be described. FIG. 2 shows this as a rotating electric machine.

  In FIG. 3, the concentrated winding permanent magnet rotating electric machine 1 includes a stator 2, a rotor 3, and an end bracket 9.

The stator 2 includes a stator core 4 and an armature winding 5. Here, the stator core 4 includes an annular stator yoke portion 41 and a salient pole magnetic pole 42, and a slot for accommodating the armature winding 5 between the salient pole magnetic pole 42 and the salient pole magnetic pole 42. 43 is provided.

  On the other hand, the rotor 3 includes a permanent magnet 6 magnetized at one magnetic pole interval, a rotor core 7 made of a magnetic material, and a shaft 8. The rotor 3 is configured to be rotatably supported by a bearing 10 that is inserted into the end bracket 9 via a shaft 8 that is inserted into the rotor core 7.

  Here, a configuration in which there is no frame on the outer periphery of the stator core 4 is shown, but a frame may be used if necessary.

  A magnetic pole position detector PS and a position detector E for detecting the position of the rotor 3 are provided on the shaft 8 of the rotor 3. Here, U1 +, U2-, U3 + are arranged in the U phase of the armature winding 5, V1 +, V2-, V3 + are arranged in the V phase, and W1 +, W2-, W3 + are arranged in the W phase, respectively.

  The subscript 1 indicates the armature winding number, and + and − indicate the winding direction of the armature winding 5. In the case of the present embodiment, an example in which three-phase windings are used and three salient poles per phase is shown in accordance with the number of poles of the rotor.

The concentrated-winding permanent magnet rotating electrical machine 1 targeted by the present invention is characterized by a configuration in which at least one of the phases with respect to the permanent magnet rotor is different from among the armature windings 5 belonging to one phase. For example, U1 +, U2-, U3 + in the U phase, V1 +, V2-, V3 + in the V phase, W1 +, W2-, in the W phase.
At least one of the phases of W3 + with respect to the permanent magnet rotor is different. From FIG. 1 or FIG. 2, the U phase has a phase difference of 180 + 20 in electrical angle between U1 + and U2- and 40 ° in electrical angle between armature windings 5 of U1 + and U3 +.

  Incidentally, in the concentrated winding permanent magnet rotating electric machine of the present invention, the number of pulsations per rotation of the cogging torque is 90, and the winding coefficient is 0.946. On the other hand, for example, in the case of a concentrated winding permanent magnet rotating electric machine having a number of salient poles of 9 and a number of poles of a permanent magnet rotor which is frequently used in industry, the cogging torque is 1 The number of pulsations per revolution is 18, and the winding coefficient is 0.886. Comparing the two, the concentrated winding permanent magnet rotating electric machine of the present invention has a high cogging torque pulsation frequency per rotation and a high winding coefficient. Therefore, the cogging torque is contrary to the pulsation frequency per rotation under the same conditions. It can be seen that the motor is low cogging torque, compact and lightweight, and highly efficient because the torque is reduced and the torque is increased in accordance with the winding coefficient. Such a configuration is an actuator for an automobile, for example, a rotating electrical machine suitable for electric power steering.

  In FIG. 3, the permanent magnet rotor 3 is rotated by applying a three-phase current to the armature winding 5 in accordance with the rotor position detected by the magnetic pole position detector PS and the position detector E for detecting the position. Generate a magnetic field. A magnetic attraction and repulsive force is generated between the rotating magnetic field and the permanent magnet field of the rotor 3 to generate a continuous rotating force. Here, it is possible to operate with the maximum torque by appropriately selecting the phase of the current.

  Here, it is assumed that the stator yoke portion 41 and the salient pole magnetic pole 42 constituting the stator core 4 are individually divided as shown in the figure. Further, the stator yoke portion 41 may be divided into a plurality of portions in the circumferential direction as necessary. Thus, by using the split iron core, the armature windings 5 can be wound in an aligned manner, and the concentrated winding permanent magnet rotating electric machine can be reduced in size and weight by using a high space factor winding.

Next, the main part of the present invention will be described with reference to FIG. The salient poles 42 of the stator 2 of the concentrated winding permanent magnet rotating electric machine 1 have U-phase windings U1 +, U2-, U3 +, V-phase windings V1 +, V2-,
V3 +, W-phase windings W1 +, W2- and W3 + are arranged.

  The connection method of the nine armature windings in FIG. 1 can be, for example, the illustrated delta connection. In a concentrated winding permanent magnet rotating electric machine for automobiles, the drive power supply is a battery, so it is as low as 12V. Therefore, the terminal voltage of the armature winding 5 can be increased by √3 times in the delta connection as compared with the star connection. As a result, the phase current can be reduced at the same output, so that the diameter of the armature winding can be reduced. When the battery voltage is higher, star connection may be used, or star connection and delta connection may be combined.

  In the embodiment of the above delta connection, the winding work can be facilitated, and the space factor of the armature winding in the slot can be improved. Thereby, the highly efficient concentrated winding permanent magnet rotating electrical machine 1 can be provided.

In FIG. 1, the winding work is performed in the order of U-phase windings U1 +, U2-, U3 +, V-phase windings V1 +, V2-, V3 +, and W-phase windings W1 +, W2-, W3 +. It is continuously wound as shown. Here, VU, UW, and WV, which are lead-out portions of the concentrated winding permanent magnet rotating electrical machine 1, can be shaped as shown in the drawing to facilitate connection to the outside. Here, the configuration of VU, UW, and WV that are the lead wire portions may be a method in which a winding is wound around a conductive motor lead terminal, and then the motor lead terminal is crimped and connected to the winding.

  According to the above configuration, since all the armature windings 5 can be connected between adjacent windings, the winding interval can be shortened. Further, when all the armature windings 5 of each salient pole are disconnected and connected, there are 6 places per phase and 18 places in 3 phases, whereas in the present invention, there is one place between UW and WV, VU. It is only necessary to connect a total of four places, two places in between, greatly reducing the number of places connected and greatly reducing electrical work. This can greatly reduce the resistance loss caused by the connection portion, and can improve the efficiency.

As an assembly method of the stator 2, the armature winding 5 is first continuously wound from one electric wire into a circular shape and U-phase windings U1 +, U2-, U3 +, V-phase windings V1 +, V2-, V3 +. , W phase winding W1 +,
W2- and W3 + are formed in this order, shaped and fixed in a circular shape, and then the salient poles 42 are inserted into the respective armature windings 5, and the armature winding 5 and the entire salient poles 42 are fixed to the stator. It is also possible to manufacture the stator 2 by inserting it into the yoke portion 41.

  In this case, the coil manufacturing accuracy can be improved by pre-manufacturing the coil with a small number of parts. For example, it is possible to produce a coil by crushing a circular wire by applying pressure from the outside. The space factor of the winding 5 is improved, and a highly efficient motor can be obtained.

  In this case, for example, the effect can be further improved by using a heat-sealed winding for the armature winding 5. For example, the space factor of the armature winding 5 can be improved by fixing by applying heat while crimping. Furthermore, if the correlation insulating paper is arranged at the boundary of the armature winding 5 in which windings of different phases are mixed in one slot 43, the molding pressure can be increased and the space factor can be further increased. Is possible.

  In the above embodiment, the circumferential interval between the armature windings 5 is constant, but between the armature windings belonging to the same phase (for example, between the U-phase windings U1 + and U2-, between U2- and U3 +). , V-phase windings V1 + and V2-, V2- and V3 +, W-phase windings W1 + and W2-, and W2- and W3 +) have small potential differences, so the circumferential spacing can be shortened. There is a large potential difference between adjacent armature windings 5 between different phases (for example, U3 + and V1 +, V3 + and W1 +, and W3 + and U1 +). There is an advantage that the torque density can be increased.

  Furthermore, between the phases in which the armature windings 5 are different, insulation between the phases can be provided to further improve the reliability.

  As described above, the structure of the embodiment of the present invention is the concentrated winding stator, the number of salient poles is 9, and the number of poles of the permanent magnet rotor is 8. However, the present invention is not limited to this. When the number of magnetic poles is M and the number of poles of the permanent magnet rotor is P, the present invention can also be applied to a concentrated winding permanent magnet rotating electrical machine having a configuration of M: P = 3n: 3n ± 1 (n is a positive integer). For example, it is possible to set the permanent magnet stator to 8 with the same stator.

(Second embodiment)
4 and 5 show another embodiment of the concentrated winding permanent magnet rotating electric machine of the present invention.

  Here, as an embodiment to which the effects of the present invention can be applied characteristically, an example will be described in which the number of salient poles is 12 for a concentrated winding stator and the number of poles for a permanent magnet rotor is 10.

  4, U1 +, U1-, U2 +, U2- for the U phase of the armature winding 5, V1 +, V1-, V2 +, V2- for the V phase, and W1 +, W1-, W2 +, W2 for the W phase. -Are arranged as shown. In the case of the present embodiment, there are four salient poles per phase in accordance with the number of poles of the rotor.

  In the above configuration, the phase of the U phase is 180-30 between the armature windings U1 + and U1-, the electrical angle is 30 degrees between U1 + and U2 +, and 180 degrees between U1 + and U2-. Similarly, it is a concentrated winding permanent magnet rotating electric machine in which at least one of the armature windings belonging to one phase has a different arrangement with respect to the permanent magnet rotor. Therefore, this configuration is also a concentrated winding permanent magnet rotating electric machine that can be expected to reduce the cogging torque and increase the winding coefficient of the armature winding 5.

  Incidentally, as shown in the figure, in the concentrated winding permanent magnet rotating electric machine in the configuration of this embodiment, the number of pulsations per rotation of the cogging torque is 60, and the winding coefficient is 0.933. On the other hand, for example, in the case of a concentrated winding permanent magnet rotating machine widely used in the industry, the number of salient poles is 12 and the number of poles of the permanent magnet rotor is 8, the rotation of the cogging torque is one rotation. The number of round pulsations is 24, and the winding coefficient is 0.886. In comparison, the configuration of the present embodiment has a higher number of pulsations per rotation of the cogging torque, and the winding coefficient can be increased or increased. The cogging torque decreases in inverse proportion to the number of pulsations per rotation under the same conditions, and the torque increases substantially in accordance with the winding coefficient, so that a motor with low cogging torque, small size, light weight, and high efficiency can be realized.

  Next, the main part of the present invention will be described with reference to FIGS.

  The salient poles 42 of the stator 2 of the concentrated winding permanent magnet rotating machine 1 are arranged in the circumferential direction with U-phase windings U1 +, U1-, W-phase windings W2-, W2 +, V-phase windings V1 +, V1-, U-phase, respectively. The windings U2- and U2 + and the W-phase winding are arranged in the order of W1 + and W1- and V-phase windings V2- and V2 +.

  The connection method of the 12 armature windings in FIG. 5 is indicated by delta connection as shown. As described above, in a concentrated winding permanent magnet rotating electric machine for automobiles, the driving power source is a battery and is as low as 12V. Therefore, the terminal voltage of the armature winding 5 can be increased by √3 times in the delta connection as compared with the star connection. As a result, the phase current can be reduced at the same output, so that the diameter of the armature winding can be reduced. This can facilitate the winding operation and can improve the space factor of the armature winding in the slot. Thereby, the highly efficient concentrated winding permanent magnet rotating electrical machine 1 can be provided.

In FIG. 5, the winding work is performed by a single wire, U-phase windings U1 +, U1-, W-phase windings W2-, W2 +, V-phase windings V1 +, V1-, U-phase windings U2-, U2 +. The W-phase winding can be continuously wound as shown in the order of W1 +, W1- and V-phase windings V2-, V2 +. Here, connection of each line to VU, UW, and WV, which are lead wire portions of the concentrated winding permanent magnet rotating electrical machine 1, can be achieved by using the connection plate 11.

A connecting portion that is arranged in the axial direction of the armature winding 5 with a connecting plate 11 made of a conductive material (for example, copper) on the ring, and that can be connected to the armature winding 5 on the outer periphery thereof. This can be achieved by making (not shown). In the figure, the lower crossover shows this. In this way, the U-phase windings U1 +, U1- and U2-, U2 +, the V-phase windings V1 +, as shown in the connection diagram in the figure for each phase.
In the V1-, V2-, V2 +, and W-phase windings, W1 +, W1-, W2-, and W2 + can be arranged in parallel.

  In the configuration of this embodiment, since there are two parallel circuits for each phase, the conductor diameter of one armature winding 5 can be reduced (for example, φ2 → φ1.4), and therefore the winding work can be facilitated. As a result, the space factor in the slot 43 of the armature winding 5 can be increased, and the motor can be made smaller, lighter and more efficient.

  Here, as the configuration of the lead wire portions VU, UW, and WV, a method is conceivable in which a winding is wound around a motor lead terminal made of a conductive material and then the winding is crimped and connected.

  According to the above configuration, since all the armature windings 5 can be connected between adjacent windings, the winding interval can be shortened. Further, when all the armature windings 5 of each salient pole are disconnected and connected, there are 8 places per phase and 24 places in 3 phases, whereas in the present invention, a total of 6 places in 2 places in each phase. It only needs to be connected at one place. Thereby, a connection location can be reduced significantly and electrical work can be reduced significantly. This can greatly reduce the resistance loss caused by the connection portion, and can improve the efficiency.

  As a method of assembling the stator 2, the armature winding 5 is first wound continuously from one electric wire into a circular shape and U-phase windings U1 +, U1-, W-phase windings W2-, W2 +, V-phase windings. Wires V1 +, V1-, U-phase windings U2-, U2 +, W-phase windings are made in the order of W1 +, W1-, V-phase windings V2-, V2 + It is also possible to manufacture the stator 2 by inserting the magnetic poles 42 into the respective armature windings 5 and further inserting the armature windings 5 and the salient pole magnetic poles 42 into the stator yoke portion 41.

  In this case as well, the coil manufacturing accuracy is improved by pre-manufacturing the coil with a small number of parts. For example, the armature winding 5 can be manufactured by crushing a circular wire by applying pressure from the outside. The space factor can be improved and a highly efficient motor can be obtained.

  Further, the effect can be further enhanced by using a heat-sealed winding for the armature winding 5. Further, the molding pressure can be increased by disposing the correlation insulating paper at the boundary of the armature winding 5 where the windings of different phases are mixed in one slot 43, and the high space factor is further improved. It becomes possible.

  Since the battery voltage is 12V, in this embodiment, the delta connection is connected in parallel. However, if the battery voltage is higher, the combination of the delta connection and the star connection or the parallel connection of the star connection It may be.

(Third embodiment)
FIG. 6 shows another embodiment of the concentrated winding permanent magnet rotating electric machine of the present invention.

  Here, an example in which the number of salient poles is 12 and the number of poles of the permanent magnet rotor is 10 in the concentrated winding stator shown in FIG.

  In FIG. 6, in the winding work, the U-phase windings U1 + and U1- and the W-phase windings W2- and W2 + are continuously connected by one line. Further, the V-phase windings V1 + and V1- and the U-phase windings U2- and U2 + are connected continuously. Further, W1 +, W1-, and V-phase windings V2-, V2 + are continuously connected to the W-phase winding. Here, connection of each line to U, V, and W, which are lead wire portions of the concentrated winding permanent magnet rotating electric machine 1, is performed using the connection plate 11.

  This can be achieved by arranging the connection plate 11 made of a conductive material (for example, copper) on the ring in the axial direction and providing a connection portion that allows connection to the armature winding 5 on the outer periphery thereof. . In the figure, the lower crossover shows this. In this way, the U-phase windings U1 +, U1- and U2-, U2 +, the V-phase windings V1 +, V1- and V2-, V2 +, and the W-phase windings as shown in the connection diagram in the figure for each phase. W1 +, W1- and W2-, W2 + can be arranged in parallel with a star connection.

  Here, unlike the embodiment of FIG. 5, the connection plate 11 requires a neutral connection plate as shown.

  According to the above configuration, when all the armature windings 5 of each salient pole are disconnected and connected, there are 8 places per phase and 24 places for 3 phases, whereas in the present invention, 3 for each phase. You can connect a total of nine locations. Thereby, a connection location can be reduced significantly and electrical work can be reduced significantly. This can greatly reduce the resistance loss caused by the connection portion, and can improve the efficiency.

  The above effects can be achieved by winding one phase of the armature winding 5 and then continuously winding the armature winding 5 belonging to the other phase.

  As described above, the structure of the present embodiment is an example in which the number of salient poles is 12 and the number of poles of the permanent magnet rotor is 10 with a concentrated winding stator, but the number of salient poles is not limited to this. Is M, and the number of poles of the permanent magnet rotor is P, the present invention is also applicable to a concentrated winding permanent magnet rotating electric machine having a configuration of M: P = 6n: 6n ± 2 (n is a positive integer).

  The concentrated winding permanent magnet rotating electrical machine 1 of the present invention is not limited to the above structure, and may be a concentrated winding permanent magnet rotating electrical machine having a number of permanent magnet poles and salient poles different from those shown in FIG. Needless to say.

  FIG. 7 shows the configuration of the armature winding 5 that can be expected to further improve the torque density. Here, a configuration is shown in which the thickness of the armature winding 5 in the radial direction is reduced on the outer peripheral side and increased on the inner peripheral side. When the armature windings are arranged in a row as shown in the figure, the length in the circumferential direction of the armature winding 5 is shorter on the inner diameter side and longer on the outer shape side when matched with the shape of the armature slot 43. On the other hand, when the current density of the conductors is adjusted to equalize the temperature, that is, when the area of the conductor is made constant, the armature winding 5 has the thicknesses h1, h2, h3, h4, h5, and h6 in the radial direction h1 <h2. <H3 <h4 <h5 <h6 may be satisfied. This can be achieved, for example, by adding a step of crushing the armature winding in the radial direction according to the radial position of the winding. The thickness of the armature winding 5 can be adjusted by changing the force applied to the armature winding 5 between the position where the inner periphery is wound and the position where the outer periphery is wound.

  Further, the above can be realized by the following method.

  For example, after winding in a single line with a round wire, the armature winding 5 is placed on the opposite side to the salient pole magnetic pole 42 in the circumferential direction with an inclination, and pressure is applied to the armature winding 5 from above in the radial direction. By applying, the armature winding 5 can be transformed into the shape shown in the figure. The contents of the present invention can be achieved by making the thickness of the outer peripheral side of the armature winding 5 smaller than the thickness of the inner peripheral side, but the shape in which the thickness or flatness changes from the inner side to the outer side as shown in the figure, In particular, it can be optimally achieved in the case of a shape that is thin and has a large flatness ratio.

  Further, in FIG. 7, the winding arrangement of one row in the circumferential direction is shown. However, the arrangement can be achieved with a plurality of rows without depending on this, and the round wire is basically used. Naturally, an effect is obtained.

  FIG. 8 is a block configuration diagram of the electric power steering apparatus according to the embodiment of the present invention.

  In the electric power steering apparatus 100, the operation of the driver's handle 101 is sensed by the controller 105 via the steering shaft 102 and the torque sensor 103, and based on this, the battery 106, the controller 105, the concentrated winding permanent magnet rotating electric machine 1, the deceleration Torque is generated in the tire 108 via the rack and pinion gear 107 by the machine 104 to assist the operation of the driver.

  As a result, the tire 108 can be directed in a desired driving direction.

  Here, in the present invention, a compact electric power steering apparatus with good operability can be provided by using a compact, lightweight, and highly efficient concentrated winding permanent magnet rotating electric machine with a small cogging torque.

  The electric power steering device has been described above, but among the concentrated winding permanent magnet rotating electrical machines used in automobiles in particular, a device for positioning using a reduction gear, a concentrated winding permanent magnet rotating electrical machine, such as an electric throttle device, automatic By using the concentrated-winding permanent magnet rotating electrical machine of the present invention for the transmission device, the electric brake device, etc., it is possible to improve the system performance by improving the positioning accuracy, to reduce the size and weight of the system.

The Example of the concentrated winding permanent magnet rotary electric machine of this invention. The Example of the concentrated winding permanent magnet rotary electric machine of this invention. Sectional drawing of the concentrated winding permanent magnet rotary electric machine of this invention. 4 shows another embodiment of the concentrated winding permanent magnet rotating electric machine according to the present invention. 4 shows another embodiment of the concentrated winding permanent magnet rotating electric machine according to the present invention. 4 shows another embodiment of the concentrated winding permanent magnet rotating electric machine according to the present invention. 4 shows another embodiment of the concentrated winding permanent magnet rotating electric machine according to the present invention. An electric power steering apparatus equipped with the concentrated winding permanent magnet rotating electric machine of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Concentrated winding permanent magnet rotary electric machine, 2 ... Stator, 3 ... Rotor, 4 ... Stator core, 5 ... Armature winding, 6 ... Permanent magnet, 7 ... Rotor core, 8 ... Shaft, 9 ... End Bracket, 10 ... bearing, 11 ... connecting plate, 41 ... stator yoke, 42 ... salient pole, 43 ... slot,
DESCRIPTION OF SYMBOLS 100 ... Electric power steering apparatus, 101 ... Steering wheel, 102 ... Steering shaft, 103 ... Torque sensor, 104 ... Reduction gear, 105 ... Controller, 106 ... Battery, 107 ... Rack and pinion gear, 108 ... Tire.

Claims (14)

The permanent magnet magnetic poles arranged at a predetermined interval, the permanent magnet field portion composed of the permanent magnet magnetic poles, the M salient magnetic poles arranged at a predetermined interval, and the salient magnetic poles are intensively wound. And having at least a multi-phase connected armature winding and an armature having the armature winding, and controlling a current flowing to the armature winding according to a moving position of the permanent magnet field. In order to generate torque in the permanent magnet field, P, which is the number of poles of the permanent magnet magnetic pole, and pole number M of the salient pole magnetic poles are:
(2/3) M <P <(4/3) A concentrated winding permanent magnet rotating electrical machine characterized by a relationship of M (where M ≠ P).   2. The concentrated winding permanent according to claim 1, wherein the armature winding includes the armature winding in which one phase of the armature winding is wound and the other phase winding is continuously wound. Magnet rotating electric machine.   2. The concentrated winding according to claim 1, further comprising an armature winding wound so that a circumferential interval between adjacent armature windings is short in a same phase and long in a different phase. Permanent magnet rotating electric machine.   The concentrated winding permanent magnet rotating electric machine according to claim 1, further comprising an armature winding in which a thickness of the armature winding in a radial direction is changed at a radial position. In Claim 1, the relationship between the number of magnetic poles P of the permanent magnet and the number of poles M of the salient pole magnet is 3n:
A concentrated winding permanent magnet rotating electrical machine characterized by being 3n ± 1 (n is a positive integer). In Claim 1, the relationship between the number of magnetic poles P of the permanent magnet and the number of poles M of the salient pole magnet is 6n:
A concentrated winding permanent magnet rotating electric machine characterized by being 6n ± 2 (n is a positive integer).   2. The concentrated winding permanent magnet rotating electric machine according to claim 1, wherein the armature winding is a delta connection.   4. The concentrated winding permanent magnet rotating electric machine according to claim 3, wherein interphase insulation is provided between the armature windings that are in contact with each other in the different phase. A steering device for assisting or driving a steering mechanism for a vehicle,
The permanent magnet magnetic poles arranged at a predetermined interval, the permanent magnet field portion composed of the permanent magnet magnetic poles, the M salient magnetic poles arranged at a predetermined interval, and the salient magnetic poles are intensively wound. And it has at least an armature winding connected in multiple phases and an armature having the armature winding, and the number P of the permanent magnet magnetic poles and the number M of the salient pole magnetic poles are: 2/3) M <P <(4/3) Concentrated winding permanent magnet rotating electrical machine satisfying the relationship of M (where M ≠ P);
A control unit for controlling a current to flow to the armature winding according to a moving position of the permanent magnet field;
A steering device that drives or assists steering by generating torque in the permanent magnet field.   10. The concentrated winding permanent magnet rotating electrical machine according to claim 9, wherein the armature winding is formed by winding one phase of the armature winding and continuously winding the other phase winding. A steering apparatus comprising:   10. The armature winding according to claim 9, wherein the concentrated winding permanent magnet rotating electric machine is wound so that a circumferential interval between the adjacent armature windings is short in a same phase and long in a different phase. A steering apparatus comprising:   10. The steering apparatus according to claim 9, wherein the concentrated winding permanent magnet rotating electric machine has an armature winding in which a radial thickness of the armature winding is changed at a radial position.   In the concentrated winding permanent magnet rotating electric machine according to claim 9, the relationship between the number P of the permanent magnets and the number M of the salient poles is 3n: 3n ± 1 (n is a positive integer). Steering device characterized. 10. The concentrated winding permanent magnet rotating electric machine according to claim 9, wherein the relationship between the number of magnetic poles P of the permanent magnet and the number of poles M of the salient pole magnet is 6n: 6n ± 2 (n is a positive integer). Steering device characterized.

Images