JP2010193675A - Motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high output and high efficiency small motor of simple structure while minimizing increase in the number of components. <P>SOLUTION: The motor includes a rotor 10 having 10 poles magnetized in the circumferential direction, and a stator 20 having twelve salient poles 22 arranged in the circumferential direction to face the rotor 10 with the winding 23 being wound around the salient poles 22, and is driven with a three-phase AC current. In the motor, a pair of adjoining salient poles 22 are paired, and the pair on one side and the pair on the other side having symmetrical relationship for the circumferential center are made, as a set of pairs corresponding to one phase, to correspond to a third phase, respectively. Every set of pairs is provided, from the pair on one side to the pair on the other side, with one winding 23 of one wire wound around one salient poles 22 of both pairs, respectively, and the other winding 23 of one wire wound around the other salient poles 22 of both pairs, respectively. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention includes a rotor magnetized to m (12 ± 2) poles, and a stator having 12 m salient poles (m is an integer of 1 or more) wound with a winding, and includes a U phase and a V phase. The present invention also relates to a motor driven by a three-phase alternating current, which is a W phase.

  In recent years, in order to realize miniaturization, high performance, high accuracy, and low noise of electrical equipment, motors are required to have further small size, high output, high rotational accuracy, and low cost. In response to these demands, in order to achieve high output, low vibration, and low noise, cogging torque can be reduced by combining a stator having 12 salient poles with a rotor magnetized on 10 poles. A suppressed technique has been proposed (see, for example, Patent Document 1). Further, a stator having 6n (n is an integer of 2 or more) salient poles is combined with a rotor magnetized to 6n ± 2 poles, and among the salient poles, mechanically with respect to the center of the motor. Proposing a connection method that provides a motor with low vibration by reducing the effect of air gap imbalance by selecting armature windings wound around salient poles at different positions (symmetrical positions) close to 180 degrees in phase. (For example, refer to Patent Document 2).

  Conventionally, in a three-phase drive motor having such a 10-pole magnetized rotor and 12 salient-pole stators, the winding winding method and the connecting method thereof have been devised, and the winding slot Techniques have been proposed for improving the space factor, improving the efficiency of winding work, and reducing the size and efficiency of motors (see, for example, Patent Document 3).

However, as disclosed in Patent Document 2, when the four salient poles corresponding to one phase are connected in series with one winding, one wire length becomes long. , Winding resistance was likely to be high. For this reason, for example, to reduce the winding resistance, it is necessary to make the winding thicker. On the other hand, according to the configuration of the conventional motor as in Patent Document 3, the stator is divided into 12 core pieces, and the winding is concentratedly wound in the same winding direction on each core piece, and thus the winding Each core piece wound around is annularly arranged. The windings of the core pieces are connected via a multilayer wiring board so that a circuit configuration in which adjacent in-phase windings are connected in series to each other is further connected in parallel to form a three-phase Y-connection circuit. By adopting such a configuration, the winding of each core piece can be connected using the wiring board. Therefore, the winding process to the core piece may be a simple process in which the winding is simply wound in the same direction. . And since it is set as the circuit structure containing the parallel connection of the coil | winding with respect to one phase, winding resistance becomes equivalently low and can reduce the wire diameter of a coil | winding. As described above, the conventional motor as disclosed in Patent Document 3 enables the winding process with a thin winding while ensuring a low resistance value equivalently by including a parallel connection. This simplifies the process and improves the slot space factor of the winding.
Japanese Patent Laid-Open No. 9-219964 Japanese Patent Publication No. 8-8764 International Publication No. 2007/052385 Pamphlet

  However, since the conventional motor like Patent Document 3 is configured to connect the windings for each core piece via a multilayer wiring board, the number of wiring boards increases, which is contrary to downsizing and weight reduction. There was a problem that the number of parts increased, leading to an increase in cost. Also, when connecting the windings for each core piece with only one wiring board or without using the wiring board, the wiring for the wiring crosses and becomes complicated. There were problems such as an increase in the number of parts and a decrease in reliability.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a small, high-output and high-efficiency motor with a simple configuration while suppressing an increase in the number of parts.

  In order to achieve the above object, the motor of the present invention includes a rotor magnetized with m (12 ± 2) poles in the circumferential direction and 12 m pieces (m is an integer of 1 or more) wound with a winding. The motor is driven by a three-phase alternating current with a stator arranged in the circumferential direction with the pole facing the rotor, and a pair of adjacent salient poles are paired, and are further symmetrical with respect to the center of the circumference The pair on one side and the pair on the opposite side are related to each of the three phases as a pair of pairs corresponding to one phase, and each pair of pairs is crossed from one side to the opposite pair. Thus, one winding is wound around each of the salient poles of both pairs, and the other winding is wound around each of the other salient poles of both pairs.

  This configuration corresponds to the case of n = 2 in the configuration of Patent Document 2 and a m-fold similar shape, and is formed by dividing one-phase winding into two. By ingenuity, the two winding ends in one side pair are electrically connected, and the two winding ends in the opposite pair are also electrically connected, so that the winding of each phase is Since a circuit including parallel connection can be formed and the winding resistance can be equivalently reduced, the wire diameter of the winding can be reduced. Furthermore, since it is only necessary to electrically connect the two winding end portions in the pair, it is only necessary to connect the adjacent winding end portions, and complicated wiring processing such as crossing of wirings is not necessary. Furthermore, for example, each pair of the three phases, which are opposite to each other, are arranged in order in the circumferential direction, and all the two winding ends in these pairs are electrically connected as neutral points, for each phase. A three-phase Y-connection circuit including a parallel connection of windings can be formed. As described above, a three-phase Y-connection can be configured by simply connecting all the winding ends that are continuously arranged, so that a complicated connection process is not necessary.

  According to the motor of the present invention, it is possible to form a three-phase Y-connection circuit including parallel connection of windings for each phase by simply connecting adjacent winding ends. That is, in order to electrically connect the winding ends, a complicated connection process is not necessary and a simple connection process may be performed. Therefore, according to the motor of the present invention, an increase in the number of parts can be suppressed and a simple configuration can be achieved. Can provide a motor with high output and high efficiency.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment)
FIG. 1 is a diagram showing a main part of a motor according to an embodiment of the present invention. In FIG. 1, the cross section seen from the longitudinal direction of the rotating shaft 11 is shown typically.

  In the motor of the present invention, a rotor magnetized to m (12 ± 2) poles in the circumferential direction and 12 m (m is an integer of 1 or more) salient poles wound with windings face the rotor and rotate. And a stator arranged in a direction. In the present embodiment, a motor including a rotor magnetized to 10 poles with m = 1 and a stator having 12 salient poles will be described as an example.

  As shown in FIG. 1, the motor according to the present embodiment includes a rotor 10 and a stator 20 disposed on the outer peripheral side of the rotor 10 around a rotating shaft 11.

  The rotor 10 is arranged so as to hold a plurality of permanent magnets 12 at equal intervals in the circumferential direction and to face the stator 20 via a predetermined gap so that the S poles and the N poles are alternately arranged. Yes. The rotor 10 holds five pairs of permanent magnets 12 with a pair of S poles and N poles, and is thereby magnetized to 10 poles in the circumferential direction. The rotor 10 is connected to the rotary shaft 11 and is rotatably held around the rotary shaft 11 so as to face the stator 20 and rotate in the circumferential direction.

  On the other hand, the stator 20 is configured by winding a winding 23 around a stator core 24 having a structure including a substantially annular yoke 21 and a plurality of salient poles 22 protruding from the yoke 21 toward the inner peripheral side. The salient poles 22 around which the windings 23 are wound are arranged at equal intervals in the circumferential direction so as to face the rotor 10. The stator 20 includes 12 such salient poles 22. A slot 25 that is an opening is formed between the salient poles 22 adjacent to each other. The windings 23 are wound around the salient poles 22 using such slots 25 of the stator core 24.

  The motor of the present embodiment is a motor driven by a three-phase alternating current having a U phase, a V phase, and a W phase that are 120 degrees out of phase with each other. Thus, in order to drive three phases, it has a U-phase input terminal 26u, a V-phase input terminal 26v, and a W-phase input terminal 26w as AC input terminals to which AC currents of U phase, V phase, and W phase are applied. ing. Although details will be described below, in the motor of the present embodiment, two windings 23 are connected to each of the U-phase input terminal 26u, the V-phase input terminal 26v, and the W-phase input terminal 26w. Yes. That is, as shown in FIG. 1, the U-phase input terminal 26u has windings 23u1 and 23u2 indicated by a one-dot chain line, the V-phase input terminal 26v has windings 23v1 and 23v2 indicated by a dotted line, and the W-phase input terminal 26w has One ends of windings 23w1 and 23w2 indicated by solid lines are electrically connected. The other ends of the windings 23u1, 23u2, 23v1, 23v2, 23w1 and 23w2 are all electrically connected as a neutral point N.

  In such a configuration, when U-phase, V-phase, and W-phase alternating currents are applied to the U-phase input terminal 26u, the V-phase input terminal 26v, and the W-phase input terminal 26w, each salient pole 22 and the rotor 10 are interposed between them. A magnetic attractive force and a repulsive force are generated, and the rotor 10 rotates about the rotation shaft 11. In particular, as in this embodiment, it is known that a motor in which cogging torque is suppressed can be realized by combining a rotor 10 magnetized with 10 poles and a stator 20 with 12 salient poles. Yes.

  Next, a detailed configuration of the stator 20 of the present embodiment will be described.

  FIG. 2 is an exploded view of the winding of the motor in the embodiment of the present invention. FIG. 2 shows the wiring of each winding 23 shown in FIG. 1 in an expanded manner, and shows the winding wiring in the stator 20 more easily. Hereinafter, the details of the stator 20 will be described with reference to FIG. 1 and FIG.

  First, since the stator 20 has 12 salient poles 22 and is configured to be driven in three phases, four salient poles 22 are assigned to one phase. In the present embodiment, four salient poles 22 are assigned as follows. That is, a pair of adjacent salient poles 22 is paired, and further, a pair on one side and a pair on the opposite side that are symmetrical to each other with respect to the center of the circumference as a pair of pairs corresponding to one phase, It corresponds to each of the three phases. In the present embodiment, as shown in FIG. 1, for the U phase, a pair of adjacent salient poles Tu11 and salient pole Tu12 are used as a pair on one side. The pair on one side and the pair on the opposite side that is symmetrical with respect to the rotation shaft 11 are a pair of adjacent salient poles Tu21 and salient pole Tu22. Thus, the set of pairs corresponding to the U phase includes salient poles Tu11, Tu12, Tu21, and Tu22.

  Similarly, for the V phase, the adjacent salient pole Tv11 and salient pole Tv12 are a pair on one side, the adjacent salient pole Tv21 and salient pole Tv22 are the opposite pair, and the pair corresponding to the V phase The set includes salient poles Tv11, Tv12, Tv21, and Tv22 that are salient poles 22. For the W phase, the adjacent salient pole Tw11 and salient pole Tw12 are a pair on one side, the adjacent salient pole Tw21 and salient pole Tw22 are the opposite pair, and the pair of pairs corresponding to the W phase includes , Salient poles Tw11, Tw12, Tw21 and Tw22, which are salient poles 22, are included.

  The windings 23 are wound around the salient poles 22 that are paired and grouped in this way. The motor according to the present embodiment includes, for each pair of pairs, one winding 23 wound around one of the salient poles 22 of each of the pairs from one pair to the opposite pair, In this configuration, each of the other salient poles 22 of both pairs is provided with the other winding 23 wound with one wire. That is, for the U phase, as shown in FIG. 1, one winding 23 u 1 as one winding 23 is not cut halfway, and the U phase input terminal 26 u side is opposite to the opposite side. It extends into a pair and is wound around one salient pole Tu11 and Tu21 of both pairs. One winding 23u2 as the other winding 23 extends from the U-phase input terminal 26u side to the opposite pair without being cut halfway, and the other salient pole Tu12 of both pairs. And Tu22.

  More specifically, the winding 23u1 is drawn from the slot 25 between the salient poles Tu11 and Tu12 to be paired to the U-phase input terminal 26u. At the same time, the winding 23u1 extends in the opposite direction, and is first wound around the salient pole Tu11 to form the coil Cu11, and then is further wound around the salient pole Tu21 via the connecting wire Cu1. Are drawn out from the slot 25 between the salient poles Tu21 and Tu22 to be paired. The winding 23u2 is drawn from the slot 25 between the pair of salient poles Tu11 and Tu12 to the U-phase input terminal 26u. At the same time, the winding 23u2 extends in the opposite direction, and is first wound around the salient pole Tu12 to form the coil Cu12, and then is further wound around the salient pole Tu22 via the connecting wire Cu2. Are drawn out from the slot 25 between the salient poles Tu21 and Tu22 to be paired.

  Thus, the pair of windings 23u1 and 23u2 are drawn out from the slot 25 formed between the pair of salient poles 22 in the outer circumferential direction. Then, one end of the windings 23u1 and 23u2 drawn out to the U-phase input terminal 26u side is electrically connected, and the U-phase for applying the U-phase AC current by this connected end. An input terminal 26u is formed. The other ends of the windings 23u1 and 23u2 drawn in the opposite direction are also electrically connected. Further, the six end portions for the three phases drawn out to the opposite side are electrically connected by the connecting portion 26n. The connecting portion 26n becomes a neutral point N of the three-phase Y connection. The ends of the windings drawn to the neutral point N side may be configured to be drawn in the outer circumferential direction from the slots adjacent to both the slots between the pair of salient poles. At least one of the windings may be configured to be drawn in the outer circumferential direction from a slot formed between the salient poles of the pair.

  Similarly to the above-described configuration in the U phase, for the V phase, one winding 23v1 as one winding 23 is changed from the V phase input terminal 26v side to the opposite pair. Are wound around one of the salient poles Tv11 and Tv21. One winding 23v2 as the other winding 23 extends from the V-phase input terminal 26v side to the opposite pair, and is wound around the other salient poles Tv12 and Tv22 of both pairs. More specifically, the winding 23v1 is drawn from the slot 25 between the pair of salient poles Tv11 and Tv12 to the V-phase input terminal 26v. At the same time, the winding 23v1 extends in the reverse direction, and is first wound around the salient pole Tv11 to form the coil Cv11, then passes through the connecting wire Cv1 and further wound around the salient pole Tv21 to become the coil Cv21. Are drawn out from the slot 25 between the salient poles Tv21 and Tv22 forming a pair. The winding 23v2 is drawn from the slot 25 between the pair of salient poles Tv11 and Tv12 to the V-phase input terminal 26v. At the same time, the winding 23v2 extends in the reverse direction, and is first wound around the salient pole Tv12 to form the coil Cv12, and then via the connecting wire Cv2 and further wound around the salient pole Tv22 to become the coil Cv22. Are drawn out from the slot 25 between the salient poles Tv21 and Tv22 forming a pair. In this manner, the pair of windings 23v1 and 23v2 are drawn out from the slot 25 formed between the pair of salient poles 22 in the outer circumferential direction. Then, one end of the windings 23v1 and 23v2 drawn to the V-phase input terminal 26v side is electrically connected, and the connected V-phase for applying a V-phase alternating current is connected to this end. An input terminal 26v is formed. The other ends of the windings 23v1 and 23v2 drawn out in the opposite direction are electrically connected to the connecting portion 26n.

  Similarly, for the W-phase, one winding 23w1 as one winding 23 is changed from the W-phase input terminal 26w side to the opposite pair to one salient pole Tw11 and Tw21 of both pairs. Wound around. One winding 23w2 as the other winding 23 extends from the W-phase input terminal 26w side to the opposite pair, and is wound around the other salient poles Tw12 and Tw22 of both pairs. More specifically, the winding 23w1 is drawn from the slot 25 between the salient poles Tw11 and Tw12 that form a pair to the W-phase input terminal 26w. At the same time, the winding 23w1 extends in the opposite direction, and is first wound around the salient pole Tw11 to form the coil Cw11, and then is further wound around the salient pole Tw21 via the connecting wire Cw1. Are drawn out from the slot 25 between the salient poles Tw21 and Tw22 to be paired. The winding 23w2 is drawn from the slot 25 between the salient poles Tw11 and Tw12 to be paired to the W-phase input terminal 26w. At the same time, the winding 23w2 extends in the opposite direction and is first wound around the salient pole Tw12 to form the coil Cw12, and then via the connecting wire Cw2 and further wound around the salient pole Tw22 to become the coil Cw22. Are drawn out from the slot 25 between the salient poles Tw21 and Tw22 to be paired. In this way, the pair of windings 23w1 and 23w2 are drawn out from the slot 25 formed between the pair of salient poles 22 in the outer circumferential direction. Then, one end of the windings 23w1 and 23w2 drawn to the W-phase input terminal 26w side is electrically connected, and the connected W-phase is used to apply a W-phase alternating current. An input terminal 26w is formed. The other ends of the windings 23w1 and 23w2 drawn out in the opposite direction are electrically connected to the connection portion 26n.

  FIG. 3 is a connection diagram of motor windings 23 in the embodiment of the present invention. That is, the circuit connection of the three-phase Y connection as shown in FIG. 3 can be configured by performing the connection process of the winding 23 as described above.

  As is clear from FIG. 3, the three-phase Y connection in the present embodiment has a circuit configuration in which circuits in which two coils are connected in series are further connected in parallel in each phase. Specifically, for example, in the case of the U phase, a coil Cu11 and Cu21 are connected in series by the winding 23u1, and a coil Cu12 and Cu22 are connected in series by the winding 23u2. Then, the end of one winding 23u1 and the end of the other winding 23u2 are electrically connected to each other in a pair on one side and the opposite side. That is, such a parallel circuit is configured by electrically connecting one end side and the other end side of each of the windings 23u1 and 23u2. Furthermore, the other end side of the parallel circuit of each phase is connected as a neutral point N at the connection portion 26n, thereby forming a three-phase Y connection.

  Thus, the motor of this embodiment has two windings 23 connected in parallel in each phase. For this reason, for example, the resistance value between the U-phase input terminal 26 u and the neutral point N is half of the resistance value of one winding 23. Thus, since the motor of this embodiment has a circuit configuration including a parallel circuit, the winding resistance can be reduced equivalently, and even if the wire diameter of one winding is reduced, the overall Since the current capacity of the winding becomes high, it can cope with the high output of the motor.

  In addition, since the motor of this embodiment can reduce the wire diameter of one winding in this way, the winding operation is easier than the winding operation of a thick winding, and the winding operation is further reduced. Since it is easy, the slot space factor can be increased.

  Further, in the motor of the present embodiment, the windings may be wired so that the two windings 23 extend from one pair to the other pair for each phase. A configuration of a three-phase Y connection can be realized by simply connecting the ends on one side and the ends on the opposite side of the two windings 23 wired in this way. As described above, the motor of the present embodiment only needs to electrically connect each of the two winding ends in the pair. Therefore, it is sufficient to connect the winding ends adjacent to each other, and the wiring intersects. No complicated wiring process is required. For this reason, a multilayer wiring board for connecting the ends of each winding and parts for cross wiring are not necessary, so that a motor with a simple configuration can be realized, thereby improving reliability. The motor can be reduced in size.

  In addition, since each of the two winding ends in the pair is pulled out from the slot formed between the salient poles of the pair in the outer peripheral direction, an input terminal and a neutral point can be easily formed. Therefore, it is more effective to simplify the motor.

  FIG. 1 shows an example of a rotor magnetized to 10 poles with m = 1 and a stator having 12 salient poles, but two winding ends in such a winding pair are connected to both ends of the pair. The structure that pulls out from the slot formed between the salient poles in the outer peripheral direction is a rotor magnetized to m (12 ± 2) poles and 12 m salient poles (m is an integer of 1 or more) wound with windings. A motor having a stator having the same configuration can be used.

  Next, in the motor of the present embodiment, details of the wiring process of the windings 23 including the winding direction of each winding 23 will be described.

  First, in each pair, a winding 23 is wound around each salient pole 22 so that the winding directions of one salient pole 22 and the other salient pole 22 are opposite to each other. For example, in the case of the U phase, as shown in FIG. 1, the winding 23u1 of the coil Cu11 and the winding 23u2 of the coil Cu12 are in different directions so that the salient poles Tu11 and Tu12 have different polarities. It is wound around.

  Further, each winding 23 is handed over from one pair of salient poles 22 to the salient pole 22 closest to the circumferential direction of the opposite pair. For example, in the case of the U phase, the winding wire 23u1 is handed over from the coil Cu11 to the salient pole Tu21 that is closest to the circumferential direction of the opposite pair via the crossover wire Cu1. The winding 23u2 is delivered from the coil Cu12 to the salient pole Tu22 that is closest to the circumferential direction of the opposite pair via the crossover wire Cu2. In other words, the connecting wire extends from the salient pole 22 on one side to the salient pole 22 in the same set that is separated by (5π / 6) radians in the circumferential direction. At this time, the winding 23 crosses the closest circumferential path from the salient pole 22 of the pair on one side to the salient pole 22 closest to the circumferential direction of the opposite pair, Delivered by a crossover. As described above, by adopting a configuration in which the winding is passed to the salient pole 22 closest to the circumferential direction of the opposite pair, the crossing of the windings 23 in the stator 20 can be reduced, and the wiring process of the windings 23 is performed. Becomes easy.

  The windings 23 thus delivered are wound around the opposite pair of salient poles 22 in the same direction as the one pair of salient poles 22. For example, in the case of the U phase, as shown in FIG. 1, the winding 23u1 has the same winding direction of the coil Cu11 and the coil Cu21 so that the salient poles Tu11 and Tu21 have the same polarity. It is wound around. The winding 23u2 is wound such that the winding directions of the coil Cu12 and the coil Cu22 are the same. Further, the salient poles Tu21 and Tu22 of the opposite pair are different from each other.

  Similarly, in the case of the V phase, as shown in FIG. 1, the winding 23v1 of the coil Cv11 and the winding 23v2 of the coil Cv12 have different directions so that the salient poles Tv11 and Tv12 have different polarities. It is wound to become. Further, the winding wire 23v1 is delivered from the coil Cv11 to the salient pole Tv21 that is closest to the circumferential direction of the opposite pair via the connecting wire Cv1. In addition, the winding 23v2 is passed from the coil Cv12 to the salient pole Tv22 that is closest to the circumferential direction of the opposite pair across the nearest circumferential path by the connecting line Cv2. The winding 23v1 is wound so that the winding directions of the coil Cv11 and the coil Cv21 are the same so that the salient poles Tv11 and Tv21 have the same polarity. The winding 23v2 is wound such that the winding directions of the coil Cv12 and the coil Cv22 are the same. Further, the salient poles Tv21 and Tv22 of the opposite pair are different from each other.

  Similarly, in the case of the W phase, as shown in FIG. 1, the winding 23w1 of the coil Cw11 and the winding 23w2 of the coil Cw12 are different from each other so that the salient poles Tw11 and Tw12 have different polarities. It is wound to become. Further, the winding 23w1 is delivered from the coil Cw11 to the salient pole Tw21 that is closest to the circumferential direction of the opposite pair via the crossover line Cw1. In addition, the winding 23w2 is passed from the coil Cw12 to the salient pole Tw22 that is closest to the circumferential direction of the opposite pair across the nearest circumferential path by the connecting line Cw2. The winding 23w1 is wound so that the winding directions of the coil Cw11 and the coil Cw21 are the same so that the salient poles Tw11 and Tw21 have the same polarity. The winding 23w2 is wound such that the winding directions of the coil Cw12 and the coil Cw22 are the same. Further, the salient poles Tw21 and Tw22 of the opposite pair are different from each other.

  In the above description, an example of an inner rotor type motor in which the stator 20 is disposed on the outer peripheral side of the rotor 10 has been described. However, an outer rotor type motor in which a rotor is disposed on the outer peripheral side of the stator may be used.

  FIG. 4 is a diagram showing a main part of another configuration example of the motor according to the embodiment of the present invention. FIG. 4 shows an example in which the present invention is applied to an outer rotor type motor. The same components as those in FIG. 1 are denoted by the same reference numerals. The motor shown in FIG. 4 is arranged such that the rotor 10 faces the outer peripheral side of the stator 20 with a predetermined gap from the stator 20. The stator 20 is configured by winding a winding 23 around a stator core 24 having a structure including a plurality of salient poles 22 projecting from the yoke 21 to the outer peripheral side. And the stator 20 including the coil | winding 23 wound by each salient pole 22 is the structure similar to the inner rotor type motor demonstrated in FIG.

  5 is a cross-sectional view of the motor shown in FIG. 4, and FIG. 6 is a top view of the motor shown in FIG.

  In the motor shown in FIG. 5, a fixing member 34 a is mounted on a base substrate 34. The stator 20 around which the winding 23 is wound is mounted on the outer peripheral side of the fixing member 34a. Moreover, the outer peripheral side of the two bearings 13 is fixed to the inner peripheral side of the fixing member 34a. On the other hand, the rotating shaft 11 is inserted on the inner peripheral side of the bearing 13. A cylindrical rotor frame 14 is fixed to the tip of the rotating shaft 11. The permanent magnet 12 is fixed to the inner peripheral surface of the rotor frame 14 so as to face the stator 20 in a cylindrical shape. The motor shown in FIG. 5 is configured such that the rotor includes a rotating shaft 11, a rotor frame 14, and a permanent magnet 12.

  On the base substrate 34, a printed circuit board 35 on which electronic components for driving a motor are mounted is mounted. The ends of the windings 23 drawn out from the stator 20 are electrically connected to the printed circuit board 35 by, for example, soldering. FIG. 5 shows a configuration in which the input end side of the winding 23 is connected by the input terminal 26 on the printed circuit board 35 and the neutral point side of the winding 23 is connected by the connecting portion 26n. 6 shows that on the printed circuit board 35, the input end side of the winding 23 is connected to the U-phase input terminal 26u, the V-phase input terminal 26v, and the W-phase input terminal 26w, and the neutral point side is on the printed circuit board 35. The structure connected to the wiring pattern as the connection part 26n formed in FIG.

  As is apparent from FIGS. 5 and 6, the motor according to the present embodiment does not require a complicated connection process for electrically connecting the ends of the windings, and may be a simple connection process. That is, there is no need for a wiring board or the like for connecting between the ends of the windings, and no complicated wiring for connecting.

  FIG. 7 is a diagram showing a main part of a configuration example of the motor when m = 2 in the embodiment of the present invention. That is, in the motor shown in FIG. 7, the rotor 10 is magnetized to 20 poles and the stator 20 has 24 salient poles. FIG. 7 shows windings for one phase, and components corresponding to those in FIG.

  In FIG. 7, it is comprised from four pairs as a pair corresponding to one phase. That is, two intermediate pairs corresponding to one phase are further provided so that each pair corresponding to one phase is arranged at equal intervals in the circumferential direction. Specifically, as shown in FIG. 7, one pair of salient poles Tu11 and Tu12 and the other salient pole are arranged so that the centers of the pairs are arranged at equal intervals of approximately 90 °. In addition to Tu21 and Tu22, salient poles Tu31 and Tu41 which are intermediate pairs are provided in one direction from one side to the opposite side, and salient poles Tu32 and Tu42 which are intermediate pairs are provided on the other direction side. .

  In addition, salient poles that form one pair adjacent to each other, including the intermediate pair, are wound such that the winding directions are opposite to each other. That is, in FIG. 7, the winding directions of the coils Cu31 and Cu41 formed on one intermediate pair of salient poles Tu31 and Tu41 are opposite to each other, and the other intermediate pair of salient poles Tu32 and Tu42. The winding directions of the coils Cu32 and Cu42 formed in the above are also opposite to each other.

  Further, as shown in FIG. 7, one winding 23u1 is connected to one salient pole Tu11 of one pair, to both salient poles Tu31 and Tu41 of the middle pair, and to one salient pole Tu21 of the opposite pair. It is wound in order. The other winding 23u2 is wound around the other salient pole Tu12 of one side pair, both salient poles Tu32 and Tu42 of the middle pair on the other direction side, and the other salient pole Tu22 of the opposite side pair. Is done. Then, one end of the winding is drawn from the slot formed between the salient poles of the pair in the outer circumferential direction, and is electrically connected in parallel to form the U-phase input terminal 26u which is an AC input end. The end portion is electrically connected by a connecting portion 26n to be a neutral point N. Although only the U phase is shown in FIG. 7, the V phase and the W phase are formed in the same manner, thereby forming a three-phase Y connection in a configuration having 24 salient poles.

  As described above, the configuration example of the motor when m = 2 is described with reference to FIG. 7. When m is 2 or more, the pairs corresponding to one phase are arranged at equal intervals in the circumferential direction. In addition, 2 (m−1) intermediate pairs corresponding to one phase are further provided, and one winding is connected to both one salient pole of one pair and one intermediate pair on one side of the circumference. One of the salient poles and the other side of the opposite pair are wound in order, and the other winding is the other salient pole of the pair on one side, the two salient poles of the middle pair on the other side of the circumference, the opposite side What is necessary is just to wind in order to the other salient pole of a pair of.

  In the above description, the winding 23 has been described with reference to an example in which the salient pole 22 of one pair is handed over to the salient pole 22 closest to the circumferential direction of the opposite pair. In the case of = 1, the configuration may be such that the pair of salient poles 22 on one side is handed over to the salient pole 22 that is symmetrical with respect to the center of the circumference, or such a configuration may be included. In other words, for example, the salient pole Tu11 may be transferred to the salient pole Tu22, and the salient pole Tu12 may be transferred to the salient pole Tu21. In addition, the winding 23 has been described with an example in which the salient pole 22 of one pair is handed over to the salient pole 22 closest to the circumferential direction of the opposite pair. May be included. With such a configuration, although the number of winding intersections in the wiring process of the stator 20 is increased, the effect of the present invention can be obtained.

  As described above, the motor according to the embodiment of the present invention includes a rotor magnetized with m (12 ± 2) poles in the circumferential direction and 12 m pieces (m is an integer of 1 or more) wound with windings. And a stator arranged in the circumferential direction facing the rotor, and a motor driven by a three-phase alternating current. Then, for each pair of salient poles, one winding wound around one of the salient poles of both pairs and one salient pole of each of the two pairs, respectively, from one side to the opposite side And the other winding wound around one line.

  With such a configuration, the ends of the two windings in one pair are electrically connected, and the ends of the two windings in the opposite pair are also electrically connected to each other. A circuit including a parallel connection of windings can be formed for each. As a result, the winding resistance can be equivalently reduced, so that the wire diameter of the winding can be reduced. Furthermore, since it is only necessary to electrically connect the ends of the two windings in the pair, it is only necessary to connect the ends of the adjacent windings, and no complicated connection processing such as wiring crossing is required. . Therefore, according to the motor of the present invention, there is no need for complicated connection processing, and simple connection processing is sufficient. Therefore, an increase in the number of components is suppressed, and a small motor with high output and high efficiency is provided with a simple configuration. be able to.

  Since the motor of the present invention can provide a motor that increases the space factor of the windings and suppresses the cogging torque with a simple configuration, it is small, high output, high efficiency, low noise, low cost, such as home appliances and electrical components. This is useful for motors that require

The figure which shows the principal part of the motor in embodiment of this invention Winding development of the motor Wiring diagram of the motor winding The figure which shows the principal part of the other structural example of the motor Sectional view of the motor shown in FIG. Top view of the motor shown in FIG. The figure which shows the principal part of the structural example when m = 2.

DESCRIPTION OF SYMBOLS 10 Rotor 11 Rotating shaft 12 Permanent magnet 13 Bearing 14 Rotor frame 20 Stator 21 Yoke 22, Tu11, Tu12, Tu21, Tu22, Tv11, Tv12, Tv21, Tv22, Tw11, Tw12, Tw21, Tw21, Tu31, Tu41, Tu32, Tu42 Salient poles 23, 23u1, 23u2, 23v1, 23v2, 23w1, 23w2 Winding 24 Stator core 25 Slot 26 Input terminal 26n Connection portion 26u U-phase input terminal 26v V-phase input terminal 26w W-phase input terminal 34 Base substrate 34a Fixing member 35 Print Substrate Cu1, Cu2, Cv1, Cv2, Cw1, Cw2 Connection line Cu11, Cu12, Cu21, Cu22, Cv11, Cv12, Cv21, Cv22, Cw11, Cw12, Cw21, Cw22 Le

Claims (8)

A rotor magnetized to m (12 ± 2) poles in the circumferential direction and 12 m (m is an integer of 1 or more) salient poles wound with windings are arranged in the circumferential direction facing the rotor. A motor including a stator and driven by three-phase alternating current,
A pair of adjacent salient poles is used as a pair, and the pair on one side and the pair on the opposite side that are symmetrical to each other with respect to the center of the circumference are set as the pair of pairs corresponding to one phase. Corresponding to each of the three phases,
For each pair of pairs, one winding wound around one of the salient poles of each of the pairs from one side to the opposite pair, and the other salient pole of both the pairs A motor comprising: the other winding wound around one wire each. When m is 2 or more,
2 (m−1) intermediate pairs corresponding to one phase are further provided so that each pair corresponding to one phase is arranged at equal intervals in the circumferential direction,
Winding the one winding in order to one salient pole of the pair on one side, both salient poles of the intermediate pair on one side of the circumference, one salient pole of the opposite pair,
The other winding is wound around the other salient pole of the pair on one side, both salient poles of the intermediate pair on the other side of the circumference, and the other salient pole of the opposite pair. The motor according to claim 1. In each of the pairs, the winding is wound around each salient pole so that the winding directions of one salient pole and the other salient pole are opposite to each other. 2. The motor according to 2. Each of the windings is handed over the nearest circumferential path from the salient pole of the pair on one side to the salient pole closest to the circumference of the opposite pair. The motor according to any one of claims 1 to 3, wherein the motor is provided. The at least one of the windings of the pair on the one side and the opposite side is drawn out in a peripheral direction from a slot formed between both salient poles of the pair. motor. One end of the winding and the other end of the winding are electrically connected in parallel with each other on the one side and the opposite side. The motor according to any one of claims 1 to 5. The pair of ends connected on the one side are AC input ends of each phase,
All the ends of the windings of the opposite phases are electrically connected as neutral points,
The motor according to claim 6, wherein a three-phase Y connection is configured. The motor according to claim 7, wherein the pair on one side corresponding to each phase is sequentially arranged adjacent to each other in the circumferential direction.

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