JP2012143055A - Rotating electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a variable magnetic flux type rotating electric machine which can provide strong magnetic flux when the rotating electric machine is operated by maximum magnetic flux and can successfully suppress magnetic flux in a weak field state, by a simple configuration.SOLUTION: A short circuit member 7 including a plurality of proximity parts 71 arranged in proximity to magnetic poles F and a connecting part 73 interconnecting the plurality of proximity parts 71 is installed at least at axial one end of a rotor 4 having the plurality of magnetic poles F. When a relative position in the circumferential direction C between the rotor 4 and the short circuit member 7 is a first position, all of the proximity parts 71 are arranged to overlap with non-magnetic pole parts E located between the magnetic poles F adjacent to each other, viewed in the axial direction. When the relative position is a second position different from the first position, part of the proximity parts 71 is arranged to overlap with the magnetic poles F having one polarity, viewed in the axial direction, and the remainder of the proximity parts 71 is arranged to overlap with the magnetic poles F having the other polarity, viewed in the axial direction.

Description

  The present invention relates to a variable field type rotating electrical machine.

  Today, a permanent magnet synchronous motor (PMSM) is widely used. In PMSM, since the permanent magnet is usually fixed to the rotor core, the magnetic flux generated from the rotor is constant. In PMSM, the induced voltage generated in the stator coil increases as the rotational speed of the rotor increases, and if the induced voltage exceeds the drive voltage, control may become impossible. In order to avoid this, field weakening control that substantially weakens the magnetic field from the rotor is performed above a certain rotational speed. However, if field-weakening control is performed, the current flowing through the stator coil increases with respect to the torque output from the rotating electrical machine, resulting in increased copper loss and reduced efficiency. Further, if the magnetic flux reaching the stator from the permanent magnet remains constant, the iron loss generated in the stator core also increases in the region where the rotational speed of the rotor is high, and the efficiency decreases. Therefore, a technique has been proposed in which the magnetic flux provided to the stator from the permanent magnet provided in the rotor is changed according to the rotational speed of the rotor. Japanese Patent Laid-Open No. 2001-314053 (Patent Document 1) provides a soft magnetic short-circuit plate adjacent to an axial end surface of a rotor iron core (rotor core) to change the relative phase between the rotor and the short-circuit plate. Thus, a rotating electrical machine that changes the amount of magnetic flux is disclosed (paragraphs 33 and 40, FIGS. 1 to 4, etc.).

  The rotating electrical machine of Patent Document 1 is an excellent one that can reduce the interlinkage magnetic flux of the stator coil by increasing the so-called leakage magnetic flux by short-circuiting the magnetic flux of the permanent magnet with the short-circuit plate. However, in order to short-circuit the magnetic flux with the short-circuit plate provided at the end portion in the axial direction of the rotor, magnetic pins that penetrate the rotor in the axial direction are provided, and the structure of the rotor is complicated. FIG. 4 of Patent Document 1 shows the relative relationship between the rotor and the short-circuit plate in the maximum short-circuit state, but only about half of the magnetic pins are covered with the short-circuit plate. There is a possibility that a sufficient magnetic path as a path may not be secured, and there is a limit to the reduction of magnetic flux.

JP 2001-314053 A

  In view of the above background, a variable magnetic flux type rotating electrical machine that can provide a strong magnetic flux when operating the rotating electrical machine with the maximum magnetic flux and can satisfactorily suppress the magnetic flux in a field-weakening state is provided with a simple structure. It is hoped that.

In view of the above problems, the characteristic configuration of the rotating electrical machine according to the present invention is as follows:
A stator having a stator coil, a rotor having a permanent magnet arranged with a magnetic pole surface facing the stator side, and having a plurality of magnetic poles with alternating polarities in the circumferential direction, and at least one end in the axial direction of the rotor And a short-circuit member that is short-circuited with the magnetic flux of the magnetic pole, and is capable of changing a field flux interlinked with the stator coil by changing a circumferential relative position between the rotor and the short-circuit member. A magnetic flux type rotating electrical machine,
The short-circuit member includes a plurality of proximity portions arranged in proximity to the magnetic poles, and a connection portion that connects the plurality of proximity portions,
When the circumferential relative position of the rotor and the short-circuit member is the first position, all of the plurality of proximity portions overlap with each other in the axial direction with respect to the non-magnetic pole portion between the adjacent magnetic poles. Arranged,
When the relative position in the circumferential direction between the rotor and the short-circuit member is a second position that is different from the first position, a part of the plurality of adjacent portions is viewed in the axial direction with respect to the magnetic pole having one polarity. Are arranged so as to overlap with each other, and the rest of the plurality of proximity portions are arranged so as to overlap with respect to the magnetic pole having the other polarity in the axial direction.

  According to this configuration, when the relative position in the circumferential direction between the rotor and the short-circuit member is the first position, all of the proximity portions of the short-circuit member overlap with each other in the axial direction with respect to the non-magnetic pole portion between the magnetic poles. Be placed. Therefore, the magnetic flux supplied from the magnetic pole to the stator is short-circuited by the short-circuit member to be a leakage magnetic flux, and the magnetic flux of the permanent magnet can be effectively provided as the interlinkage magnetic flux of the stator coil. On the other hand, when the relative position is a second position different from the first position, the proximity portion is disposed so as to overlap the magnetic pole in the axial direction. Since the plurality of proximity portions are separately arranged so as to overlap with the magnetic poles of different polarities, the magnetic flux provided from the magnetic poles passes from the proximity portion to the proximity portion overlapping with the magnetic poles of different polarities via the connecting portion. It is guided. That is, a short-circuit magnetic path of “magnetic pole—proximity part—connecting part—proximity part—magnetic pole” is formed, and the leakage magnetic flux is promoted. As a result, the interlinkage magnetic flux of the stator coil is reduced and a field weakening state is obtained. Thus, according to this configuration, a strong magnetic flux can be provided when operating the rotary electric machine with the maximum magnetic flux, and a variable magnetic flux type rotary electric machine that can suppress the magnetic flux satisfactorily in the field weakening state can be simplified. Can be provided in structure.

  More specifically, it is preferable that the magnetic pole structure and the short-circuit member structure in the rotor satisfy the following conditions. That is, as one preferable aspect, the end portion of the magnetic pole surface in the circumferential direction in each of the magnetic poles is a magnetic pole outer end portion, and the circumferential distance between the magnetic pole outer ends in each of the magnetic poles is a magnetic pole width. The circumferential distance between the magnetic pole outer ends of the adjacent magnetic poles is a magnetic pole interval, the circumferential width of each of the proximity portions of the short-circuit member is a proximity width, and the plurality of proximity portions are It is preferable that the number of the magnetic poles is equal to that of the plurality of magnetic poles and is connected by the connecting portion at a constant circumferential interval, and the width of the proximity portion is set to be equal to or smaller than the magnetic pole interval. As described above, when the relative position in the circumferential direction with the rotor is the first position, the proximity portion of the short-circuit member overlaps in the axial direction with respect to the non-magnetic pole portion between the magnetic pole and the first position. Are overlapped in the axial direction with respect to the magnetic poles at different second positions. If a plurality of adjacent portions are connected to the connecting portion at the same number as the plurality of magnetic poles and at a constant circumferential interval, the leakage flux can be changed in a balanced manner in the circumferential direction, and the stator coil The flux linkage can be changed. Furthermore, since the proximity portion width of the short-circuit member is set to be equal to or less than the magnetic pole interval, the proximity portion overlaps the magnetic pole when the proximity portion overlaps the non-magnetic pole portion in the first position in the axial direction. There is no. Therefore, the leakage magnetic flux in the first position is well suppressed, and the rotor can provide the maximum possible magnetic flux to the stator coil.

  Here, it is preferable that the adjacent portion width, the magnetic pole width, and the magnetic pole interval are set to be the same. The proximity portion width, the magnetic pole width, and the magnetic pole interval are designed with tolerances that are acceptable in manufacturing. It can be said that the proximity portion width, the magnetic pole width, and the magnetic pole interval are the same when they are within an allowable range including such a design tolerance range and a manufacturing error range. That is, it can be said that the proximity portion width, the magnetic pole width, and the magnetic pole interval are set to be substantially the same.

  When the magnetic pole width and the magnetic pole interval are the same (substantially the same), the magnetic poles and the non-magnetic pole portions are alternately arranged with a uniform width in the circumferential direction. As described above, the proximity portion of the short-circuit member overlaps in the axial direction with respect to the non-magnetic pole portion when the circumferential relative position to the rotor is the first position, and in the axial direction with respect to the magnetic pole at the second position. Duplicate. Since the same proximity portion overlaps, the magnetic flux can be easily controlled by changing the relative position if the magnetic pole and the non-magnetic pole have the same width. In addition, as described above, when the proximity portion width of the short-circuit member is set to be equal to or less than the magnetic pole interval, the proximity portion does not overlap the magnetic pole when the proximity portion overlaps the non-magnetic pole portion. Leakage magnetic flux at one position is suppressed. In other words, the proximity portion width of the short-circuit member is allowed to be increased to the magnetic pole interval. When the proximity portion width matches the magnetic pole interval, the magnetic flux from the magnetic pole can be received to the maximum when the proximity portion overlaps the magnetic pole at the second position. As a result, the leakage flux can be promoted and the effect of the field weakening can be maximized.

  Similar to the fact that the width of the proximity portion of the short-circuit member is set to be equal to or less than the magnetic pole interval, it is preferable that the structure of the connecting portion is also defined in order to suppress the formation of unnecessary magnetic flux of leakage magnetic flux. It is. Generally, if the permanent magnet is a side close to the stator, for example, an inner rotor type rotating electrical machine, the permanent magnet is arranged on the side close to the outer periphery of the rotor (outside in the radial direction). Accordingly, the proximity portion of the short-circuit member is also formed on the side close to the outer periphery of the rotor, that is, on the radially outer side of the short-circuit member. On the other hand, for example, when the connecting member has a flat plate shape, the connecting portion is formed relatively radially inward so as to connect the adjacent portions and not overlap with the magnetic poles when viewed in the axial direction. At this time, it is preferable that a range in which the connecting portion is allowed to be radially inside is defined. As one preferable aspect, in the inner rotor type rotating electrical machine in which the rotor is disposed radially inward of the stator and opposed to the stator in the radial direction, The length from the center to the radially outer edge of the connecting portion is the connecting portion radius, and the end located on the innermost radial direction of the permanent magnet constituting the magnetic pole is a magnetic pole inner peripheral end, The length from the center of the rotating shaft of the rotor to the inner peripheral edge of the magnetic pole is a magnetic pole inner peripheral radius, the short-circuit member is formed in a flat plate shape, and the connecting portion radius is equal to or less than the magnetic pole inner peripheral radius. It is good to be formed.

Skeleton diagram showing relationship between rotor, short-circuit member and relative position conversion mechanism Axial sectional view of a rotating electrical machine schematically showing an example of a relationship between a rotor and a short-circuit member A plan view of an axial view schematically showing an example of the relationship between the rotor and the short-circuit member Plan view in axial direction schematically showing the flow of magnetic flux at the time of maximum field weakening Plan view in the axial direction showing parts and dimensions related to the magnetic pole Plan view in the axial direction showing parts and dimensions related to the short-circuit member Explanatory drawing schematically showing the part and dimensions related to the magnetic pole by a linear model Explanatory drawing which shows the site | part and dimension relevant to a short circuit member typically by a linear model Explanatory drawing which shows typically the relationship between the magnetic pole in a 1st position, and a short circuit member by a linear model. Explanatory drawing which shows typically the relationship between the magnetic pole of a 2nd position (at the time of a maximum field weakening state), and a short circuit member by a linear model. Plan view in the axial direction showing an example in which each magnetic pole is composed of one permanent magnet Plan view in the axial direction showing an example in which each magnetic pole is composed of three permanent magnets The top view which shows another example of the magnetic pole inner periphery radius of the magnetic pole comprised with two permanent magnets The top view which shows another example of the magnetic pole inner periphery radius of the magnetic pole comprised with one permanent magnet The top view which shows another example of the magnetic pole inner periphery radius of the magnetic pole comprised by three permanent magnets Plan view in axial view schematically showing another example of the relationship between the rotor and the short-circuit member Axial cross-sectional view of a rotating electrical machine schematically showing an example of a structure having a gap between the rotor and the short-circuit member at the connecting portion

  Hereinafter, there is provided a short-circuit member provided at at least one end in the axial direction of the rotor and capable of short-circuiting the magnetic flux of the magnetic poles, and a field where the relative position in the circumferential direction between the rotor and the short-circuit member is changed to link the stator coil An embodiment of a variable magnetic flux type rotating electrical machine capable of changing a magnetic flux will be described with reference to the drawings. As shown in FIGS. 1 and 2, the rotating electrical machine 2 of the present embodiment includes an inner rotor type embedded magnet type rotating electrical machine (IPMSM: interior permanent magnet synchronous motor) in which a rotor 4 is disposed inside a stator 3. It is. In the following description, unless otherwise specified, the “axial direction L”, “radial direction R”, and “circumferential direction C” are based on the axis of the rotor 4 (that is, the rotation axis).

  In the present embodiment, a rotating electrical machine 2 in which short-circuit members 7 are provided at both ends in the axial direction L of the rotor 4 will be described as an example. Naturally, although the effect of short-circuiting the magnetic flux is weakened, it is possible to adopt a configuration in which the short-circuit member 7 is provided at either one end in the axial direction L of the rotor 4. As shown in FIG. 3, permanent magnets 24 are embedded in the rotor core 4 a of the rotor 4. The field magnetic flux provided by the permanent magnet 24 becomes the interlinkage magnetic flux for the stator coil 3b, but the field magnetic flux interlinked with the stator coil 3b changes according to the relative position in the circumferential direction C between the rotor 4 and the short-circuit member 7, A variable magnetic flux type rotating electrical machine 2 is realized. As shown in FIG. 1, the rotating electrical machine 2 constitutes the drive device 1 together with a relative position adjusting mechanism 50 that adjusts the relative position of the rotor 4 and the short-circuit member 7 in the circumferential direction C. Is synonymous with the output shaft 6.

  The stator 3 is fixed to the inner surface of the peripheral wall portion of the case (not shown). The stator 3 includes a stator core 3 a and a stator coil 3 b wound around the stator core 3 a, and constitutes an armature of the rotating electrical machine 2. In this example, the stator core 3a is formed by laminating a plurality of electromagnetic steel plates, and is formed in a cylindrical shape. Inside the stator 3 in the radial direction, a rotor 4 as a field magnet having a permanent magnet 24 is disposed in a rotor core 4a formed by laminating a plurality of electromagnetic steel plates in the same manner as the stator core 3a. The rotor core 4 a is disposed on the radially inner side with respect to the stator 3 so as to face the stator 3 in the radial direction R. The rotor 4 includes a rotor core support member 49 that supports the rotor core 4a and rotates integrally with the rotor core 4a. The rotor 4 is supported by the case via the rotor core support member 49 so as to be rotatable around the rotation axis, and rotates relative to the stator 3.

  As will be described later, in the present embodiment, short-circuit member support members 79 that support the short-circuit members 7 provided at both ends of the rotor 4 are installed through the rotor 4. In order to penetrate the short-circuit member support member 79, the rotor core support member 49 is formed in a cylindrical shape. The short-circuit member support member 79 penetrates the rotor core support member 49 in a part in the circumferential direction C, and supports one short-circuit member 7 in the axial direction L. Therefore, in FIG. 1 and FIG. 2, the rotor core support member 49 is divided and illustrated, but the relative position adjustment mechanism 50 and the rotor core 4 a are connected without being divided.

  In the present embodiment, for example, as shown in FIG. 5, each magnetic pole F in the rotor 4 has two permanent magnets 24 with the same magnetic pole surface FP facing the stator 3 side in a sectional view in the radial direction R. And one end (magnetic pole inner end FA) of the end of the magnetic pole surface FP (magnetic pole end MT) is adjacent to and adjacent to the other (magnetic outer end FT). It is configured. One of these magnetic pole face end portions MT (magnetic pole inner end portion FA) is located radially inward as compared with the other (magnetic pole outer end portion FT), and the two permanent magnets 24 are arranged in a substantially V-shape. ing. In this embodiment, the rotor 4 which has the magnetic pole F of 8 poles (4 pole pair) is illustrated.

  Here, the symbol NP is a magnetic pole surface FP indicating the N pole surface, and the symbol SP is a magnetic pole surface FP indicating the S pole surface. Reference sign FN is an N-pole magnetic pole F, and reference sign FS is an S-pole magnetic pole F. When it is necessary to distinguish the permanent magnet 24 according to the polarity of the magnetic pole F, the permanent magnet constituting the N-pole magnetic pole FN is referred to as 24N, and the permanent magnet constituting the S-pole magnetic pole FS is referred to as 24S. Here, the end portion (magnetic pole surface end portion MT) of the magnetic pole surface FP in the circumferential direction C in each magnetic pole F is the magnetic pole outer end portion FT. Further, the circumferential distance between the magnetic pole outer ends FT in each magnetic pole F is the magnetic pole width M1, and the circumferential distance between the magnetic pole outer ends FT of the adjacent magnetic poles F is the magnetic pole interval M2. A region corresponding to the magnetic pole interval M2 in the circumferential direction C of the rotor 4 is appropriately referred to as a “non-magnetic pole portion E” as a concept of a pair of magnetic poles F. Furthermore, the magnetic pole surface end MT located on the innermost radial direction in the magnetic pole surface FP constituting the magnetic pole F is the magnetic pole inner end FA. Further, the end (magnet inner end portion MA) located on the innermost radial direction of the permanent magnet 24 constituting the magnetic pole F is a magnetic pole inner peripheral end FI, and the magnetic pole inner peripheral end from the center of the rotating shaft of the rotor 4. The length to the portion FI is the magnetic pole inner peripheral radius M3.

  As shown in FIGS. 1 and 2, the short-circuit member 7 formed of a magnetic material such as an electromagnetic steel plate includes a short-circuit member support member 79 that rotates integrally with the short-circuit member 7. In the present embodiment, short-circuit members 7 are provided at both ends of the rotor 4 in the axial direction. Therefore, the short-circuit member support member 79 penetrates the rotor 4 and supports the two short-circuit members 7 provided at both ends of the rotor 4. On the other hand, when viewed in the axial direction, the short-circuit member 7 is configured as follows. As shown in FIG. 3, the short-circuit member 7 is formed radially inward when viewed in the axial direction, and has an annular (here, annular plate-like) connecting portion 73 and the radially outward from the connecting portion 73. Protruding proximity portion 71 is formed and is configured in a spur gear shape. A plurality of proximity portions 71 are provided according to the number of magnetic poles F, and a connection portion 73 connects the plurality of proximity portions 71. In the present embodiment, the plurality of proximity portions 71 are connected by the connection portions 73 at the same number and a constant circumferential interval as the plurality of magnetic poles F. For this reason, the leakage flux can be changed in equilibrium in the circumferential direction C, and the linkage flux of the stator coil 3b can be changed while maintaining the equilibrium state.

  FIG. 3A shows a state in which the relative position in the circumferential direction C between the rotor 4 and the short-circuit member 7 is the first position, and the magnetic pole F and the proximity portion 71 are not in proximity. In the first position (non-proximity state), the proximity portion 71 of the short-circuit member 7 is adjacent to the non-magnetic pole portion E between adjacent magnetic poles F, that is, overlaps the non-magnetic pole portion E in the axial direction. FIG. 3B shows a state in which the relative position in the circumferential direction C between the rotor 4 and the short-circuit member 7 is the second position, and the magnetic pole F and the proximity portion 71 are in the proximity state. In the proximity state, the proximity portion 71 of the short-circuit member 7 is close to the magnetic pole F and overlaps with the magnetic pole F when viewed in the axial direction. In the present embodiment, the second position is a position shifted by 90 degrees in electrical angle from the first position, and is the maximum field-weakening position. As described above, in the present embodiment, the rotor 4 having the magnetic pole F of 8 poles (4 pole pairs) is illustrated, and the N poles and the S poles are alternately arranged. Adjacent magnetic poles F are magnetic poles F of different polarities, and the interval between the adjacent magnetic poles F corresponds to 180 degrees in electrical angle. Since the second state is a position shifted from the first state by half of the interval between the magnetic poles F, it is a position shifted by 90 degrees in electrical angle.

  As shown in FIGS. 3B and 4A, when the proximity portion 71 overlaps with the magnetic pole F in the axial direction, a magnetic path is formed through the proximity portion 71 and the connecting portion 73 and adjacent to each other. The polarity magnetic pole F is short-circuited, and so-called leakage magnetic flux increases. The hatched portion in FIG. 4A indicates the region of the short-circuit member 7 (corresponding to the proximity portion 71) that overlaps the magnetic pole F in the axial direction, and the arrow between the adjacent magnetic poles F indicates the path of the leakage magnetic flux. Is schematically shown. By increasing the leakage magnetic flux, the magnetic flux (field magnetic flux) that reaches the stator 3 relatively decreases, and a field weakening is realized. FIG. 4B shows the maximum weakening field when the magnetic pin 104 penetrating the rotor 100 (4) in the axial direction is provided as in the above-described Patent Document 1 (Japanese Patent Laid-Open No. 2001-314053). The magnetic position is illustrated. A hatched portion in FIG. 4B indicates an overlapping region of the magnetic pin 104 and the short-circuit plate 202 when viewed in the axial direction. As is clear from a comparison between FIG. 4A and FIG. 4B, the overlapping region is much wider in FIG. 4A according to the present embodiment. Therefore, compared with the structure of patent document 1, the direction of this embodiment can make more magnetic flux into a leakage magnetic flux, and can implement | achieve an effective field weakening.

  On the other hand, as shown in FIG. 3A with respect to FIG. 3B, when the proximity portion 71 is in the first position between the adjacent magnetic poles F (non-magnetic pole portion E), During this period, no positive short circuit occurs and almost no leakage flux occurs. Thus, in the short-circuit member 7, the leakage magnetic flux passing through the short-circuit member 7 is suppressed and the magnetic flux (field magnetic flux) reaching the stator 3 is increased, and the leakage magnetic flux passing through the short-circuit member 7 is increased to the stator 3. It arrange | positions so that transition can be performed between the states where the magnetic flux which reaches | attains decreases. That is, the rotating electrical machine 2 is configured to be able to change the field magnetic flux linked to the stator coil 3 b by changing the relative position in the circumferential direction C between the rotor 4 and the short-circuit member 7. For ease of explanation, the first position (0 degree position) where the leakage magnetic flux is most suppressed and the second position (90 degree position) where the leakage magnetic flux is the largest are illustrated. Any relative position where the angle is between 0 and 90 degrees can be set. As the relative position shifts from 0 degrees to 90 degrees in electrical angle, the leakage flux gradually increases and the field flux decreases. Since such a change in magnetic flux is well known, detailed description and illustration are omitted.

  Reference is again made to FIG. The relative position adjustment mechanism 50 shown in FIG. 1 is a mechanism that adjusts the relative position in the circumferential direction C between the rotor core support member 49 and the short-circuit member support member 79. As described above, the rotor core support member 49 rotates integrally with the rotor core 4a, and the short-circuit member support member 79 rotates integrally with the short-circuit member 7. Accordingly, the relative position in the circumferential direction C between the rotor core 4a and the short-circuit member 7 is adjusted by the relative position adjusting mechanism 50. In the present embodiment, as shown in FIG. 1, the relative position adjusting mechanism 50 includes two differential gear devices (a first differential gear device 51 and a second differential gear device 52) arranged along the axial direction L. And is arranged on one side in the axial direction L with respect to the rotating electrical machine 2 (the left side in the drawing in the present embodiment).

  In the present embodiment, the first differential gear device 51 and the second differential gear device 52 are configured by a single pinion type planetary gear mechanism including three rotating elements. The first differential gear device 51 includes a first carrier 51b that supports a plurality of pinion gears, and a first sun gear 51a and a first ring gear 51c that mesh with the pinion gears, respectively, as rotating elements. The second differential gear device 52 includes a second carrier 52b that supports a plurality of pinion gears, and a second sun gear 52a and a second ring gear 52c that mesh with the pinion gears, respectively, as rotating elements. The first sun gear 51 a is drivingly connected so as to rotate integrally with the short-circuit member supporting member 79, and the second sun gear 52 a is drivingly connected so as to rotate integrally with the rotor core supporting member 49. The first carrier 51b and the second carrier 52b are drivingly connected so as to rotate integrally with the output shaft 6. Thus, the short-circuit member support member 79 and the rotor core support member 49 are drivingly connected to the output shaft 6 via the relative position adjustment mechanism 50. That is, in this example, both the short-circuit member support member 79 and the rotor core support member 49 are drivingly connected to the common output shaft 6 via the relative position adjustment mechanism 50. The second ring gear 52c is fixed to a fixing portion 80 such as a wall surface of the case via a ring-shaped member.

  A worm wheel 54b is provided on the outer peripheral surface of the first ring gear 51c facing the radially outer side. The worm wheel 54b meshes with a worm gear 54a for adjusting the rotational position (circumferential position) of the first ring gear 51c. The worm gear 54a is connected to a driving force source such as a motor (not shown). The rotational position of the first ring gear 51c can be changed by rotating the worm gear 54a with this driving force source. When the rotational position of the first ring gear 51c is adjusted, the worm gear 54a is rotationally driven by the driving force source, and the worm gear 54a is fixed via the stopped driving force source except during the adjustment. That is, the first ring gear 51c is in a fixed state except when the rotational position is adjusted.

  In the present embodiment, the first carrier 51 b and the second carrier 52 b integrally form an integral carrier 53, and the integral carrier 53 is drivingly connected so as to rotate integrally with the output shaft 6. In the present embodiment, the first differential gear device 51 and the second differential gear device 52 are configured to have the same diameter, and the gear ratio of the first differential gear device 51 (= the teeth of the first sun gear 51a). Number / the number of teeth of the first ring gear 51c) and the ratio of the number of teeth of the second differential gear device 52 (= the number of teeth of the second sun gear 52a / the number of teeth of the second ring gear 52c) are set to be equal to each other. Then, except when adjusting the rotational position of the first ring gear 51c, both the first ring gear 51c and the second ring gear 52c are in a fixed state. Therefore, the short-circuit member support member 79 drivingly connected to the first sun gear 51a and the rotor core support member 49 drivingly connected to the second sun gear 52a rotate at the same rotational speed (rotor rotational speed). The rotational speed of the output shaft 6 is reduced with respect to the rotor rotational speed, and in this example, the torque of the rotating electrical machine 2 is amplified and transmitted to the output shaft 6.

  As described above, in the present embodiment, the second ring gear 52c is fixed to the fixed portion 80, whereas the rotational position of the first ring gear 51c can be adjusted. That is, in the two planetary gear mechanisms in which the carriers are integrally formed, one ring gear can be moved relative to the other ring gear in the circumferential direction C (that is, relative rotation). With this relative rotation, one sun gear rotates relative to the other sun gear. Therefore, the relative position in the circumferential direction C between the first sun gear 51a and the second sun gear 52a can be adjusted by adjusting the rotational position of the first ring gear 51c. As a result, the relative position in the circumferential direction C between the rotor core support member 49 and the short-circuit member support member 79 can be adjusted.

  As described above, the rotating electrical machine 2 of this embodiment can adjust the interlinkage magnetic flux reaching the stator coil 3b by adjusting the relative position in the circumferential direction C between the rotor 4 and the short-circuit member 7. This is a variable magnetic flux type rotating electrical machine. Such a variable magnetic flux type rotating electric machine has a simple structure and can provide a strong magnetic flux when operating the rotating electric machine with the maximum magnetic flux, and can suppress the magnetic flux well in a weak field state. It is desirable to be. For this purpose, optimization of the structure of the magnetic pole F in the rotor 4 and the structure of the short-circuit member 7 is required. Hereinafter, a preferable example of the structure of the magnetic pole F and the structure of the short-circuit member 7 will be described. FIG. 5 and FIG. 6 define the definitions of the names and dimensions of the parts that are prepared for defining the optimum relationship between the two.

  Although partially overlapping with the contents described above, the definition of the structure, name, dimensions, etc. of the magnetic pole F will be described with reference to FIG. In the present embodiment, each magnetic pole F has two permanent magnets 24 with the same magnetic pole surface FP facing the stator 3 side in the radial direction R cross-sectional view, and the end portions of the magnetic pole surface along the magnetic pole surface FP. One of the MTs (the inner end FA of the magnetic pole) is arranged adjacent to and adjacent to the other (the outer end FT of the magnetic pole FT). The magnetic pole outer end portion FT of the permanent magnet 24 in each magnetic pole F is disposed on the side of the stator 3 (radially outward) from the magnetic pole inner end portion FA, and the two permanent magnets 24 are disposed in a substantially V shape. Has been. As described above, the magnetic pole outer end portion FT is the end portion (magnetic pole surface end portion MT) of the magnetic pole surface FP in the circumferential direction C of each magnetic pole F. The circumferential distance between the magnetic pole outer ends FT in each magnetic pole F is the magnetic pole width M1, and the circumferential distance between the magnetic pole outer ends FT of the adjacent magnetic poles F is the magnetic pole interval M2. In addition, the magnetic pole face end MT located on the innermost radial direction in the magnetic pole face FP constituting the magnetic pole F is the magnetic pole inner end FA. The end (magnet inner end MA) located on the innermost radial direction of the permanent magnet 24 constituting the magnetic pole F is the innermost point (the inner peripheral end) in the radial direction R of the magnetic pole F. . Therefore, the magnet inner end portion MA is the magnetic pole inner peripheral end portion FI, and the length from the center of the rotating shaft of the rotor 4 to the magnetic pole inner peripheral end portion FI is the magnetic pole inner peripheral radius M3.

  Similarly, although partially overlapping with the contents described above, the definition of the structure, name, dimensions, etc. of the short-circuit member 7 will be described next with reference to FIG. The short-circuit member 7 is formed radially inward when viewed in the axial direction, and has an annular (here, annular plate-like) connecting portion 73 and a proximity portion that protrudes radially outward from the connecting portion 73. 71 and is configured in a spur gear shape. A plurality of proximity portions 71 are provided according to the number of magnetic poles F, and a connection portion 73 connects the plurality of proximity portions 71. Here, the circumferential width of the radially outer end of the proximity portion 71 of the short-circuit member 7 is defined as a proximity portion width S1. In addition, the radius of the outer peripheral portion in the radial direction of the annular connecting portion 73 is defined as a connecting portion radius S3. That is, the length from the center of the rotating shaft of the rotor 4 to the outer edge in the radial direction of the connecting portion 73 is the connecting portion radius S3.

  The magnetic pole width M1, the magnetic pole interval M2, the proximity portion width S1, and the like may be defined by angles as illustrated in FIGS. Alternatively, the magnetic pole width M1 and the magnetic pole interval M2 are curved distances on an arc passing through the magnetic pole outer end portion FT with the rotation axis as the center, and the proximity portion width S1 is the center of the rotation axis with respect to the proximity portion 71 of the short-circuit member 7. It is good also as the curve distance on the circular arc which passes an outer end. However, as will be described later, when the magnitude relationship between the magnetic pole width M1 and the magnetic pole interval M2 and the proximity portion width S1 is defined, it is preferable that the standards for defining the respective widths (lengths) are aligned. Therefore, for example, when the magnetic pole width M1 and the magnetic pole interval M2 are defined as the curved distance on the arc passing through the magnetic pole outer end portion FT, the definition of the proximity portion width S1 is defined by setting the magnetic pole outer end portion FT around the rotation axis. It is good also as the curve distance on the said circular arc which the circular arc which passes and the proximity part 71 overlap in an axial view. Naturally, as illustrated in FIGS. 5 and 6, the same reference is used when the angle is defined by the angle around the rotation axis of the rotor 4.

  Hereinafter, based on the above-described definition, a preferred example of the structure of the magnetic pole F and the structure of the short-circuit member 7 will be described with reference to FIGS. In FIG. 7 to FIG. 10, for ease of explanation, a linear model will be used for explanation. FIG. 7 corresponds to FIG. 5 and shows definitions in the linear model of the magnetic pole width M1, the magnetic pole interval M2, and the magnetic pole inner radius M3. FIG. 8 corresponds to FIG. 6 and shows the definition in the linear model of the proximity portion width S1 and the connecting portion radius S3. 9, particularly FIG. 9A corresponds to FIG. 3A, and the relative position in the circumferential direction C between the rotor 4 and the short-circuit member 7 in the linear model is the first position, and the magnetic pole F and the proximity portion 71 Indicates a non-adjacent state. FIG. 10 corresponds to FIG. 3B, and the relative position in the circumferential direction C between the rotor 4 and the short-circuit member 7 in the linear model is the second position, and the magnetic pole F and the proximity portion 71 are in the proximity state. It shows the state.

  Similar to the magnetic pole F, the proximity portion 71 is provided at a constant circumferential interval, and the proximity portion width S1 is set to be equal to or less than the magnetic pole interval M2 (M2 ≧ S1). As shown in FIG. 9A, since the proximity portion width S1 of the short-circuit member 7 is set to be equal to or less than the magnetic pole interval M2, the proximity portion 71 is viewed in the axial direction with respect to the non-magnetic pole portion E at the first position. When overlapping, the magnetic pole F does not interfere (overlap). Therefore, the leakage magnetic flux in the first position is suppressed, and the rotor 4 can provide the maximum possible magnetic flux to the stator coil 3b. On the other hand, as shown in FIG. 9B, when the proximity portion width S1 is larger than the magnetic pole interval M2, the proximity portion 71 overlaps the non-magnetic pole portion E in the axial direction in the first position or in the vicinity of the first position. In doing so, a part of the proximity portion 71 overlaps the magnetic pole F as well. As a result, the proximity portion 71 becomes a magnetic path of the leakage magnetic flux, the leakage magnetic flux increases, and the interlinkage magnetic flux of the stator coil 3b is reduced. The first position is a relative position that suppresses the leakage magnetic flux as much as possible and provides the magnetic flux generated by the permanent magnet 24 to the stator coil 3b as much as possible. Therefore, an increase in the leakage magnetic flux is not preferable. Therefore, the proximity portion width S1 needs to be equal to or less than the magnetic pole interval M2.

  Similarly, since the short-circuit member 7 is formed so that the connecting portion radius S3 is equal to or less than the magnetic pole inner peripheral radius M3 (M3 ≧ S3), the proximity portion 71 is axial with respect to the non-magnetic pole portion E at the first position. It is suppressed that the connection part 73 overlaps with the non-magnetic pole part E and becomes a magnetic path of leakage flux when overlapping in the direction view. FIG. 9A illustrates a case where the connecting portion radius S3 is less than the magnetic pole inner radius M3 (M3> S3). On the other hand, as shown in FIG. 9C, when the connecting portion radius S3 exceeds the magnetic pole inner peripheral radius M3 (M3 <S3), the connecting portion 73 becomes a magnetic path of leakage magnetic flux. Therefore, it is desirable that the short-circuit member 7 be formed so that the connecting portion radius S3 is equal to or less than the magnetic pole inner peripheral radius M3.

  As described above, when the short-circuit member 7 is formed so that the connecting portion radius S3 is equal to or less than the magnetic pole inner peripheral radius M3, the flat short-circuit member 7 is installed in a form close to the end surface in the axial direction L of the rotor 4. can do. That is, as shown in FIG. 2, it is not necessary to provide a space for preventing a short circuit between the rotor 4 and the short-circuit member 7. Therefore, the short-circuit member 7 is provided in the axial direction L in order to realize a variable magnetic flux. Moreover, it can suppress that the length of the axial direction L of the rotor 4 becomes long, and can also suppress that the structure of the rotary electric machine 2 becomes complicated.

  Here, it is preferable that the magnetic pole width M1 and the magnetic pole interval M2 have the same width, and the proximity portion width S1 is set to be equal to or smaller than the magnetic pole interval M2 (M1 = M2 ≧ S1). When the magnetic pole width M1 and the magnetic pole interval M2 are the same width, the magnetic pole F that provides the magnetic flux and the non-magnetic pole portion E that is not provided are alternately arranged with a uniform width in the circumferential direction. As described above with reference to FIG. 3, when the relative position in the circumferential direction C with respect to the rotor 4 is the first position, the proximity portion 71 of the short-circuit member 7 is between the magnetic pole F and the magnetic pole F (non-magnetic pole portion E). In FIG. 3 (a). Further, the proximity portion 71 of the short-circuit member 7 overlaps in the magnetic pole F as viewed in the axial direction at the second position (maximum field weakening position) shifted by 90 degrees in electrical angle from the first position (FIG. 3B). ). Since the same proximity part 71 overlaps, when the magnetic pole F and the non-magnetic pole part E have the same width, it is easy to control the magnetic flux, and the rotor 4 effectively provides the interlinkage magnetic flux to the stator coil 3b. be able to.

  In the example shown in FIG. 9A, the proximity portion width S1, which is the circumferential width of the proximity portion 71 of the short-circuit member 7, is set to the same width as the magnetic pole interval M2. That is, the proximity portion width S1 is the same width as the magnetic pole width M1 and the magnetic pole interval M2 (M1 = M2 = S1). As described above, when the magnetic pole width M1 and the magnetic pole interval M2 are the same width, the magnetic pole F and the non-magnetic pole portion E are arranged in a uniform width in the circumferential direction C. If the proximity portion width S1 of the short-circuit member 7 is equal to or less than the magnetic pole interval M2, the proximity portion 71 overlaps the magnetic pole F when the proximity portion 71 overlaps the non-magnetic pole portion E in the axial direction L at the first position. The leakage magnetic flux in the first position is suppressed. In other words, the proximity width S1 of the short-circuit member 7 can be increased up to the magnetic pole interval M2. FIG. 9A and FIG. 10 exemplify a case where the proximity portion width S1 is maximized to the magnetic pole interval M2 as described above, and the proximity portion width S1 is the same width as the magnetic pole width M1 and the magnetic pole interval M2. (M1 = M2 = S1). As shown in FIG. 10, in the second position, the proximity portion 71 can receive the magnetic flux from the magnetic pole F to the maximum, and the leakage flux can be promoted to maximize the effect of the field weakening. .

  In the above description, “the magnetic pole width M1 and the magnetic pole interval M2 are the same width” and “the proximity portion width S1 is the same width as the magnetic pole width M1 and the magnetic pole interval M2”. Including the case where they are within a predetermined allowable range. The proximity portion width, the magnetic pole width, and the magnetic pole interval are designed with tolerances that are acceptable in manufacturing. Therefore, when such tolerance ranges including design tolerances and manufacturing errors are within an allowable range, they can be referred to as “same width”. That is, it can be said that the magnetic pole width M1 and the magnetic pole interval M2 are substantially the same width (M1≈M2), and the proximity portion width S1 is approximately the same width as the magnetic pole width M1 and the magnetic pole interval M2 (M1≈M2≈S1).

[Another embodiment]
(1) In the said embodiment, it demonstrated using the example in which the one magnetic pole F was comprised by the two permanent magnets 24. FIG. However, the present invention is not limited to the form, and one magnetic pole F may be constituted by one permanent magnet 24 or may be constituted by three or more permanent magnets 24. FIG. 11 shows an example in which one magnetic pole F is constituted by one permanent magnet 24. FIG. 11A illustrates the first position, and FIG. 11B illustrates the second position. FIG. 12 shows an example in which one magnetic pole F is composed of three permanent magnets 24. FIG. 12A illustrates the first position, and FIG. 12B illustrates the second position.

  As shown in FIG. 11, when one magnetic pole F is constituted by one permanent magnet 24, as a preferred form, the permanent magnet 24 is arranged so that the magnetic pole surface FP is orthogonal to the radial direction R. . The magnetic pole surface end MT of the magnetic pole surface FP corresponds to the magnetic pole outer end FT. The magnet inner end MA is a point where the opposite surface of the magnetic pole surface FP is perpendicular to the radial direction R, and the magnet inner end MA corresponds to the magnetic pole inner peripheral end FI. As shown in FIG. 11C, the magnetic pole width M1 and magnetic pole interval M2 with respect to the magnetic pole outer end FT and the magnetic pole inner radius M3 with reference to the magnetic inner peripheral end FI are the same as in the above embodiment. Can be prescribed.

  As shown in FIG. 12, when one magnetic pole F is constituted by three permanent magnets 24, as a preferred form, a U-shape opened on the stator 3 side, that is, on the outer peripheral side (radially outer side) of the rotor 4. A permanent magnet 24 is disposed on the surface. Specifically, one permanent magnet 24 is disposed at the center portion in the circumferential direction C, and the magnetic pole surface FP is orthogonal to the radial direction R. The other two permanent magnets 24 disposed at both ends in the circumferential direction C of the magnetic pole F are such that one magnetic pole surface end MT is adjacent to the magnetic pole surface end MT of the permanent magnet 24 disposed in the center. Placed in. The magnetic pole surface ends MT on the radially outer sides of these two permanent magnets 24 arranged at both ends in the circumferential direction C of the magnetic pole F, that is, the magnetic pole surface ends MT positioned at both ends in the circumferential direction C of the magnetic pole F are It becomes the outer end FT. Further, these two permanent magnets 24 are arranged so that the other magnetic pole surface end portion MT (magnetic pole outer end portion) is opposite to the magnetic pole surface end portion MT adjacent to the magnetic pole surface end portion MT of the permanent magnet 24 disposed in the center. FT) is arranged so as to be located radially outside. Further, one magnetic pole surface end MT adjacent to the magnetic pole surface end MT of the permanent magnet 24 arranged at the center is positioned relatively to the central side of the magnetic pole F in the circumferential direction C, and the other magnetic pole surface end. The magnetic pole outer end portion FT, which is the portion MT, is positioned relatively away from the central portion side of the magnetic pole F in the circumferential direction C, and the three permanent magnets 24 are arranged in a U shape that opens radially outward. The

  In the example shown in FIG. 12, the magnet inner end portion MA is a point where the opposite surface of the magnetic pole surface FP of the permanent magnet 24 arranged at the central portion in the circumferential direction C of the magnetic pole F is orthogonal to the radial direction R. The magnet inner end MA corresponds to the magnetic pole inner peripheral end FI. As shown in FIG. 12C, the magnetic pole width M1, the magnetic pole interval M2, and the magnetic pole inner radius M3 with reference to the magnetic pole inner end FI are the same as in the above-described embodiment. Can be specified.

(2) In the above embodiment, the center of the rotating shaft of the rotor 4 is defined by using the magnet inner end MA, which is the innermost radial end of the permanent magnet 24 constituting the magnetic pole F, as the magnetic pole inner peripheral end FI. The length from the magnetic pole inner peripheral end FI (magnet inner end MA) to the magnetic pole inner peripheral radius M3. However, the definition of the magnetic pole inner peripheral radius M3 is not limited to this form. For example, the point located on the innermost radial direction of the magnetic pole surface FP constituting the magnetic pole F is defined as the magnetic pole inner peripheral end FI, and the length from the center of the rotation axis of the rotor 4 to the magnetic pole inner peripheral end FI is defined as the magnetic pole inner peripheral FI. The radius M3 may be used. Although details will be described later, when one magnetic pole F is composed of two permanent magnets 24, the magnetic pole inner end FA, which is the magnetic pole face end MT, is positioned on the innermost radial direction of the magnetic pole face FP. The inner peripheral end FI can be used. Further, when one magnetic pole F is composed of one permanent magnet or three permanent magnets 24 and the permanent magnet 24 having the magnetic pole surface FP orthogonal to the radial direction R is provided at the center of the magnetic pole F. The point where the magnetic pole surface FP and the radial direction R are perpendicular to each other can be defined as the magnetic pole inner peripheral end FI. Hereinafter, when the magnetic pole F is composed of one permanent magnet 24, two permanent magnets 24, and three permanent magnets 24, a point located on the innermost radial direction of the magnetic pole surface FP is defined as a magnetic pole inner peripheral end FI. The set magnetic pole inner radius M3 will be described.

  FIG. 13 corresponds to FIG. 5 and shows an example in which one magnetic pole F is constituted by two permanent magnets 24. Since the arrangement of the permanent magnets 24 is as described above, the description thereof is omitted. As shown in FIG. 13, the point located on the innermost radial direction in the magnetic pole surface FP constituting the magnetic pole F is the magnetic pole inner end FA as the magnetic pole surface end MT, and this magnetic pole inner end FA is in the magnetic pole. It becomes the peripheral end FI. The length from the center of the rotation axis of the rotor 4 to the magnetic pole inner peripheral end FI (magnetic pole inner end FA) is the magnetic pole inner peripheral radius M3.

  FIG. 14 corresponds to FIG. 11C and shows an example in which one magnetic pole F is constituted by one permanent magnet 24. FIG. 15 corresponds to FIG. 12C and shows an example in which one magnetic pole F is constituted by three permanent magnets 24. Since the arrangement of the permanent magnets 24 is as described above, the description thereof is omitted. As shown in FIG. 14, the point located most radially inward in the magnetic pole surface FP constituting the magnetic pole F is the point where the magnetic pole surface FP and the radial direction R intersect, and this point is the magnetic pole inner peripheral end FI. It becomes. The length from the center of the rotation axis of the rotor 4 to the magnetic pole inner peripheral end FI is a magnetic pole inner peripheral radius M3. Similarly, as shown in FIG. 15, the point located on the innermost radial direction in the magnetic pole surface FP constituting the magnetic pole F is the same as the magnetic pole surface FP of one permanent magnet 24 arranged in the center of the circumferential direction C and the radial direction. This is the point where R intersects, and this point becomes the magnetic pole inner peripheral end FI. The length from the center of the rotation axis of the rotor 4 to the magnetic pole inner peripheral end FI is a magnetic pole inner peripheral radius M3.

(3) In the above embodiment, as illustrated in FIG. 3 and the like, the plurality of proximity portions 71 are connected to the connection portions 73 at the same number and a constant circumferential interval as the plurality of magnetic poles F to form the short circuit member 7. Exemplified case. In this embodiment, the leakage flux can be changed in equilibrium in the circumferential direction, and the linkage flux of the stator coil can be changed while maintaining the equilibrium state. However, the field weakening that weakens the interlinkage magnetic flux to the stator coil 3b is required when the rotational speed of the rotor 4 is high and the induced electromotive force becomes large. There is no major problem even if the performance is slightly impaired. Therefore, as illustrated in FIG. 16, in the second position, a part of the plurality of proximity portions 71 is arranged so as to overlap with a magnetic pole F (for example, FS) having one polarity in the axial direction, As long as the remaining portions 71 are arranged so as to overlap with the magnetic pole F (for example, FN) having the other polarity in the axial direction, the number of the adjacent portions 71 may not be the same as the number of the magnetic poles F. Further, the proximity portions 71 may not be formed at a constant circumferential interval. However, it is preferable that the number of the adjacent portions 71 overlapping the magnetic pole F (for example, FS) having one polarity and the number of the adjacent portions 71 overlapping the magnetic pole F (for example, FN) having the other polarity be the same.

(4) In the embodiment described above, an example in which the flat short-circuit member 7 is installed in a form close to the end face of the rotor 4 in the axial direction L is shown. However, the present invention is not limited to this, and a space may be provided between the rotor 4 and the short-circuit member 7 as shown in FIG. In this case, if the space in the axial direction L between the end face (permanent magnet 24) of the rotor 4 and the connecting portion 73 is sufficiently secured, the condition of “S3 <M3” described with reference to FIG. Not necessary.

(5) In the above embodiment, the inner rotor type rotating electrical machine 2 has been described as an example. However, those skilled in the art will recognize that the present invention can be applied to an outer rotor type rotating electrical machine without departing from the gist of the present invention. Applicable. However, such modifications are also within the technical scope of the present invention.

  The present invention can be applied to a variable magnetic flux type rotating electrical machine.

2: Rotating electrical machine 3: Stator 3b: Stator coil 4: Rotor 7: Short circuit member 24: Permanent magnet 71: Proximity portion 73: Connection portion C: Circumferential direction E: Non-magnetic pole portion F: Magnetic pole FA: Magnetic pole inner end FI: Magnetic pole inner peripheral end FP: Magnetic pole surface FT: Magnetic pole outer end L: Axial direction M1: Magnetic pole width M2: Magnetic pole interval M3: Magnetic pole radius MA: Magnet inner end MT: Magnetic pole surface end (end of magnetic pole surface )
S1: Proximity part width S2: Connection part radius

Claims (4)

A stator having a stator coil, a rotor having a permanent magnet arranged with a magnetic pole surface facing the stator side, and having a plurality of magnetic poles with alternating polarities in the circumferential direction, and at least one end in the axial direction of the rotor And a short-circuit member that is short-circuited with the magnetic flux of the magnetic pole, and is capable of changing a field flux interlinked with the stator coil by changing a circumferential relative position between the rotor and the short-circuit member. A magnetic flux type rotating electrical machine,
The short-circuit member includes a plurality of proximity portions arranged in proximity to the magnetic poles, and a connection portion that connects the plurality of proximity portions,
When the circumferential relative position of the rotor and the short-circuit member is the first position, all of the plurality of proximity portions overlap with each other in the axial direction with respect to the non-magnetic pole portion between the adjacent magnetic poles. Arranged,
When the relative position in the circumferential direction between the rotor and the short-circuit member is a second position that is different from the first position, a part of the plurality of adjacent portions is viewed in the axial direction with respect to the magnetic pole having one polarity. The rotating electrical machine is disposed so as to overlap with each other, and the rest of the plurality of proximity portions overlaps the magnetic pole having the other polarity in an axial view. An end of the magnetic pole surface in the circumferential direction of each of the magnetic poles is a magnetic pole outer end, a circumferential distance between the magnetic pole outer ends of each of the magnetic poles is a magnetic pole width, and the magnetic poles of the adjacent magnetic poles The circumferential distance between the outer ends is the magnetic pole spacing, and the circumferential width of each of the proximity parts of the short-circuit member is the proximity part width,
2. The rotating electrical machine according to claim 1, wherein the plurality of proximity portions are connected by the connection portions at the same number and a constant circumferential interval as the plurality of magnetic poles, and the width of the proximity portion is set to be equal to or less than the magnetic pole interval.   The rotating electrical machine according to claim 2, wherein the adjacent portion width, the magnetic pole width, and the magnetic pole interval are set to be substantially the same. The rotor is disposed radially inward of the stator and radially opposed to the stator,
The length from the center of the rotating shaft of the rotor to the radially outer edge of the connecting portion is the radius of the connecting portion, and the end located on the innermost radial direction of the permanent magnet constituting the magnetic pole is the inner periphery of the magnetic pole The length from the center of the rotation axis of the rotor to the inner peripheral end of the magnetic pole is the inner peripheral radius of the magnetic pole,
4. The rotating electrical machine according to claim 1, wherein the short-circuit member is formed in a flat plate shape and has a radius of the coupling portion that is equal to or smaller than an inner radius of the magnetic pole. 5.

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