Rotor of a rotating electrical machine

Abstract

A rotor of a rotating electric machine capable of suppressing a reduction in the output of the rotating electric machine is obtained. The rotor of the rotating electric machine comprises: a rotor core formed with a winding insertion hole and a magnet insertion hole; a rotor winding portion inserted into the winding insertion hole; and a rotor permanent magnet inserted into the magnet insertion hole, the rotor winding portion having a non-magnet portion and a rotor winding provided on the non-magnet portion, the non-magnet portion being fixed to the rotor core, and the rotor winding being fixed to the rotor core via the non-magnet portion.

Description

Technical Field

[0001] The present invention relates to a rotor of a rotating electric machine in which a rotor winding portion is provided on a rotor core. Background Art

[0002] In the past, a rotor of a rotating electric machine is known, which includes a rotor core formed with an insertion hole for a winding portion and a rotor winding portion inserted into the insertion hole for the winding portion, and the rotor winding portion has a winding portion permanent magnet and a rotor winding wound around the winding portion permanent magnet (for example, refer to Patent Document 1).

[0003] Prior Art Literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2013-162612 Summary of the invention

[0006] Problems to be solved by the invention

[0007] However, since current is supplied to the rotor winding, the rotor winding generates heat. The heat generated in the rotor winding is transferred to the winding permanent magnet. As a result, the temperature of the winding permanent magnet rises. Therefore, the magnetic force of the winding permanent magnet decreases. As a result, there is a problem of reduced output of the rotating electrical machine.

[0008] The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a rotor of a rotating electric machine capable of suppressing a decrease in the output of the rotating electric machine.

[0009] Means for solving problems

[0010] The rotor of the rotating electric machine of the present invention comprises: a rotor core, which is formed with an insertion hole for a magnet; a rotor winding portion, which is arranged on the rotor core; and a rotor permanent magnet, which is inserted into the insertion hole for the magnet, and the rotor winding portion has: a non-magnet portion, which is composed of a magnetic component or a non-magnetic component other than a permanent magnet; and a rotor winding, which is arranged on the non-magnet portion, the non-magnet portion has a fixing surface fixed to the rotor core, and the rotor winding is fixed relative to the rotor core via the non-magnet portion.

[0011] The rotor of the rotating electric machine of the present invention comprises a rotor core and a rotor winding portion arranged on the rotor core, the rotor winding portion comprising: a non-magnet portion, which is composed of a magnetic component or a non-magnetic component other than a permanent magnet; a rotor winding, which is arranged in the non-magnet portion; and a winding portion permanent magnet, which is arranged in the non-magnet portion separately from the rotor winding, the non-magnet portion having a fixing surface fixed to the rotor core, and the rotor winding is fixed relative to the rotor core via the non-magnet portion.

[0012] Effects of the Invention

[0013] According to the rotor of the rotating electric machine of the present invention, it is possible to suppress a decrease in the output of the rotating electric machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a perspective view showing a rotating electrical machine according to Embodiment 1 of the present invention.

[0015] Figure 2 Yes means Figure 1 A three-dimensional view of the stator.

[0016] Figure 3 Yes means Figure 1 A three-dimensional view of the rotor.

[0017] Figure 4 Yes means Figure 3 A cross-sectional view of the main parts of the rotor.

[0018] Figure 5 Yes means Figure 1 Circuit diagram of a rotating electrical machine.

[0019] Figure 6 It means in Figure 2 Graph of the induced voltage generated in the stator winding.

[0020] Figure 7 It is a cross-sectional view showing a main part of a rotor of a rotating electrical machine according to Embodiment 2 of the present invention.

[0021] Figure 8 It is a cross-sectional view showing a main part of a rotor of a rotating electrical machine according to Embodiment 3 of the present invention.

[0022] Fig. 9 It means that Figure 8 Diagram of the magnetic flux through the rotor when the rotor winding is supplied with current.

[0023] Fig.10 It is a cross-sectional view showing a main part of a rotor of a rotating electrical machine according to a fourth embodiment of the present invention.

[0024] Fig.11 It means that Fig.10 Diagram of the magnetic flux through the rotor when the rotor winding is supplied with current.

[0025] Fig.12 It is a cross-sectional view showing a main part of a rotor of a rotating electrical machine according to a fifth embodiment of the present invention.

[0026] Fig.13 It is a cross-sectional view showing a main part of a rotor of a rotating electrical machine according to Embodiment 6 of the present invention.

[0027] Fig.14It is a cross-sectional view showing a main part of a rotor of a rotating electrical machine according to a seventh embodiment of the present invention.

[0028] Fig.15 It is a cross-sectional view showing a main part of a rotor of a rotating electrical machine according to an eighth embodiment of the present invention.

[0029] Fig.16 It is a cross-sectional view showing a main part of a rotor of a rotating electrical machine according to Embodiment 9 of the present invention.

[0030] Fig.17 It is a cross-sectional view showing a main part of a rotor of a rotating electrical machine according to a tenth embodiment of the present invention.

[0031] Fig.18 It is a cross-sectional view showing a main part of a rotor of a rotating electrical machine according to Embodiment 11 of the present invention.

[0032] Fig.19 It is a cross-sectional view showing a main part of a rotor of a rotating electrical machine according to a twelfth embodiment of the present invention.

[0033] Fig. 20 Yes means Fig.19 A three-dimensional view of the inner diameter side iron core portion.

[0034] Fig.21 Yes means Fig.19 A three-dimensional view of the outer diameter side iron core portion. DETAILED DESCRIPTION

[0035] Hereinafter, the rotary motors of various embodiments of the present invention will be described using the accompanying drawings. In each figure, the elements required to illustrate the rotary motors of various embodiments of the present invention are shown, but not all actual elements are necessarily shown. In the rotary motors of various embodiments of the present invention, the fixing method can be any fixing method as long as it can fix the object. Therefore, the fixing method is not limited. In addition, in the rotary motors of various embodiments of the present invention, being equal to each other in size means being approximately the same as each other. In other words, as long as they are within the range of the dimensional tolerance, even if the sizes are different from each other, they are recorded as being equal to each other.

[0036] Implementation Method 1

[0037] Figure 1 1 is a perspective view showing a rotating electrical machine according to a first embodiment of the present invention. As the rotating electrical machine 1, for example, an AC generator motor for a vehicle can be cited. The rotating electrical machine 1 includes a stator 2 and a rotor 3 that rotates relative to the stator 2. The stator 2 is arranged so as to surround the outer circumference of the rotor 3. The stator 2 is fixed to a front bracket not shown and a rear bracket not shown.

[0038] In this example, the rotation direction refers to the direction in which the rotor 3 rotates, the radial direction refers to the radial direction of the rotor 3 , and the axial direction refers to the axial direction of the rotor 3 .

[0039] Figure 2 Yes means Figure 1 2 is a perspective view of a stator 2. The stator 2 includes a stator core 21 and a plurality of stator windings 22 provided on the stator core 21. The stator core 21 is formed in a circular ring shape. The plurality of stator windings 22 are arranged in a row in the circumferential direction of the rotor 3.

[0040] Figure 3 Yes means Figure 1 The rotor 3 is a three-dimensional view of the rotor 3. The rotor 3 includes a shaft 31, a bearing 32 provided on the shaft 31, a collector ring 33 provided on the shaft 31, and a rotor core 34 provided on the shaft 31. The shaft 31 is rotatably supported by the front bracket and the rear bracket via the bearing 32. The collector ring 33 is arranged to be farther away from the rotor core 34 than the bearing 32 in the axial direction. The collector ring 33 is arranged at a position closer to the rear bracket than the front bracket in the axial direction. In addition, the rotor 3 includes a brush (not shown) that contacts the collector ring 33.

[0041] The rotor core 34 is formed in a cylindrical shape. The radial direction of the rotor core 34 coincides with the radial direction of the rotor 3 , the axial direction of the rotor core 34 coincides with the radial direction of the rotor 3 , and the circumferential direction of the rotor core 34 coincides with the circumferential direction of the rotor 3 .

[0042] Figure 4 Yes means Figure 3 sectional view of the main part of the rotor 3. The rotor core 34 is formed with a winding insertion hole 341 and a magnet insertion hole 342. Figure 4 , one winding insertion hole 341 and one magnet insertion hole 342 are shown, but a plurality of winding insertion holes 341 and a plurality of magnet insertion holes 342 are formed in the rotor core 34. The plurality of winding insertion holes 341 and the plurality of magnet insertion holes 342 are arranged at equal intervals in the circumferential direction of the rotor core 34. In addition, the winding insertion holes 341 and the magnet insertion holes 342 are formed to extend in the axial direction of the rotor core 34. The winding insertion holes 341 and the magnet insertion holes 342 are arranged in the radial direction of the rotor core 34. The magnet insertion holes 342 are arranged at a position further outward than the winding insertion holes 341 in the radial direction of the rotor core 34.

[0043] The rotor 3 further includes a rotor winding portion 35 inserted into the winding portion insertion hole 341 and a rotor permanent magnet 36 inserted into the magnet insertion hole 342. One rotor winding portion 35 is inserted into each of the plurality of winding portion insertion holes 341. One rotor permanent magnet 36 is inserted into each of the plurality of magnet insertion holes 342. The rotor winding portion 35 and the rotor permanent magnet 36 are arranged in a radial direction of the rotor core 34. The rotor permanent magnet 36 is arranged at an outer side than the rotor winding portion 35 in the radial direction of the rotor core 34.

[0044] The rotor winding 35 has a non-magnet portion 351, a rotor winding 352 provided on the non-magnet portion 351, and a winding permanent magnet 353 provided on the non-magnet portion 351. The non-magnet portion 351 is composed of a magnetic member other than a permanent magnet or a non-magnetic member. Current is supplied to the rotor winding 352 via the brush and the slip ring 33.

[0045] like Figure 3 As shown, the rotor 3 further includes an end plate 37 that holds the rotor permanent magnet 36. The end plate 37 prevents the rotor permanent magnet 36 from moving relative to the rotor core 34 in the axial direction.

[0046] like Figure 4 As shown, the winding part permanent magnet 353 is provided in the non-magnet part 351 separately from the rotor winding 352. The non-magnet part 351 is fixed to the rotor core 34. The non-magnet part 351 has a fixed surface fixed to the rotor core 34. The fixed surface of the non-magnet part 351 is fixed to the inner surface of the winding part insertion hole 341. The rotor winding 352 is wound on the non-magnet part 351. The direction perpendicular to the winding direction of the rotor winding 352 is set as the winding axial direction. The rotor winding 352 is arranged in a manner that the winding axial direction is consistent with the radial direction of the rotor core 34.

[0047] The winding permanent magnet 353 is surrounded by the rotor winding 352 in the circumferential direction and the axial direction. In other words, the winding permanent magnet 353 is arranged on the inner side of the rotor winding 352 in the circumferential direction and the axial direction. The end of the non-magnet portion 351 in the radial direction is fixed to the rotor core 34. The rotor winding 352 is fixed to the rotor core 34 via the non-magnet portion 351.

[0048] Next, the operation of the rotating electrical machine 1 will be described. First, the case where the rotating electrical machine 1 operates as a motor will be described. Figure 5 Yes means Figure 1 1 is a circuit diagram of a rotating electrical machine 1. A direct current is supplied from a battery 101 to a power circuit unit 102 via a power supply terminal. A control circuit unit 103 performs on / off control of each switching element of the power circuit unit 102. Thus, the power circuit unit 102 converts the direct current into an alternating current. The alternating current is supplied to a stator winding 22 of a stator 2.

[0049] On the other hand, based on the command from the control circuit unit 103, a DC current is supplied to the rotor winding 352 of the rotor winding unit 35. The magnetic flux generated by the rotor winding 352, the magnetic flux generated by the winding unit permanent magnet 353, and the magnetic flux generated by the rotor permanent magnet 36 interlink with the AC current flowing through the stator winding 22, thereby generating a driving torque. The generated driving torque causes the rotor 3 to rotate relative to the stator 2.

[0050] Next, the case where the rotating electrical machine 1 operates as a generator will be described. When the engine is being driven, the rotational torque of the engine is transmitted from the crankshaft to the shaft 31 via a mechanical connection member such as a belt and gears. As a result, the rotor 3 rotates relative to the stator 2.

[0051] Based on the instruction from the control circuit unit 103, a direct current is supplied to the rotor winding 352 of the rotor winding unit 35. The magnetic flux generated by the rotor winding 352, the magnetic flux generated by the winding unit permanent magnet 353, and the magnetic flux generated by the rotor permanent magnet 36 are linked with the stator winding 22, so that a three-phase AC voltage is induced in the stator winding 22. Thus, an AC current is supplied to the power circuit unit 102. The control circuit unit 103 performs on / off control of each switching element of the power circuit unit 102. Thus, the power circuit unit 102 converts the AC current into a DC current. The DC current is supplied to the battery 101. Thus, the battery 101 is charged.

[0052] When the rotating electrical machine 1 operates as a motor and a generator, it is not necessarily necessary to supply current to the rotor winding 352. The rotating electrical machine 1 can be operated as a motor and a generator using only the magnetic flux generated by the rotor permanent magnets 36.

[0053] Figure 6 It means in Figure 2 FIG. 2 is a diagram of the induced voltage generated in the stator winding 22. Figure 6 , the energized state when current is supplied to the rotor winding 352 and the non-energized state when current is not supplied to the rotor winding 352 are shown. The direction of the magnetic flux generated in the rotor winding 352 when current is supplied becomes the direction of the magnetic flux of the rotor permanent magnet 36. In other words, the direction of the magnetic flux generated in the rotor winding 352 when current is supplied coincides with the direction of the magnetic flux of the rotor permanent magnet 36.

[0054] The current supplied to the rotor winding 352 does not necessarily need to be supplied via the slip ring and the brush. A self-excited rotating electrical machine 1 may be used to supply current to the rotor winding 352 using a voltage induced in the rotor winding 352 by a magnetic flux generated by supplying current to the stator winding 22.

[0055] As described above, according to the rotor 3 of the rotating electrical machine 1 of the first embodiment of the present invention, the rotor winding 352 is fixed to the rotor core 34 via the non-magnet portion 351. The rotor permanent magnet 36 is inserted into the magnet insertion hole 342. Therefore, the rotor permanent magnet 36 is arranged separately from the rotor winding 352. As a result, the heat generated in the rotor winding 352 is suppressed from being transferred to the rotor permanent magnet 36. As a result, the temperature increase of the rotor permanent magnet 36 can be suppressed. Therefore, the heat demagnetization resistance of the rotor permanent magnet 36 can be improved. As a result, the reduction in the output of the rotating electrical machine 1 can be suppressed.

[0056] The rotor winding 35 is inserted into the winding insertion hole 341, and the fixing surface of the non-magnet portion 351 is fixed to the inner surface of the winding insertion hole 341. Thus, the rotor winding 35 can be easily arranged inside the rotor core 34.

[0057] In addition, the winding portion permanent magnet 353 is provided in the non-magnet portion 351 separately from the rotor winding 352. Thus, the heat generated in the rotor winding 352 is prevented from being transferred to the winding portion permanent magnet 353. As a result, the increase in the temperature of the winding portion permanent magnet 353 can be suppressed. Therefore, the heat demagnetization resistance of the winding portion permanent magnet 353 can be improved. As a result, the reduction in the output of the rotating electric machine 1 can be suppressed.

[0058] In addition, the rotor winding portion 35 is fixed to the rotor core 34. Thus, the rotor winding portion 35 can be fixed to the rotor core 34 after the rotor winding 352 is wound around the non-magnet portion 351. As a result, the rotor winding 352 can be easily wound. Therefore, the productivity of the rotor 3 can be improved.

[0059] Furthermore, in the above-described first embodiment, a structure is described in which the winding portion insertion hole 341 is formed in the rotor core 34 and the rotor winding portion 35 is inserted into the winding portion insertion hole 341. However, the present invention is not limited thereto, and for example, a structure in which the rotor core 34 is divided into a plurality of parts and the fixing surface of the non-magnet portion 351 is fixed to at least one of the plurality of divided parts may be adopted.

[0060] Implementation Method 2

[0061] Figure 7 1 is a cross-sectional view showing the main part of the rotor of the rotating electrical machine according to Embodiment 2 of the present invention. The rotor winding portion 35 has a non-magnet portion 351 and a rotor winding 352 provided on the non-magnet portion 351. The rotor winding portion 35 is different from Embodiment 1 in that it does not have a winding portion permanent magnet 353. The other structures are the same as those of Embodiment 1.

[0062] As described above, according to the rotor 3 of the rotating electrical machine 1 of the second embodiment of the present invention, the rotor winding 352 is fixed to the rotor core 34 via the non-magnet portion 351. The rotor permanent magnet 36 is inserted into the magnet insertion hole 342. Therefore, the rotor permanent magnet 36 is arranged separately from the rotor winding 352. As a result, the heat generated in the rotor winding 352 is suppressed from being transferred to the rotor permanent magnet 36. As a result, the temperature increase of the rotor permanent magnet 36 can be suppressed. Therefore, the heat demagnetization resistance of the rotor permanent magnet 36 can be improved. As a result, the reduction in the output of the rotating electrical machine 1 can be suppressed.

[0063] Implementation 3

[0064] Figure 8 1 is a cross-sectional view showing a main part of a rotor of a rotating electrical machine according to Embodiment 3 of the present invention. In the rotor core 34, a pair of magnet insertion holes 342 are formed in a row in the circumferential direction of the rotor core 34. A pair of rotor permanent magnets 36 are inserted into each of the pair of magnet insertion holes 342.

[0065] The rotor winding portion 35 is arranged at the center of the region between the pair of rotor permanent magnets 36 in the circumferential direction of the rotor core 34. The pair of rotor permanent magnets 36 are arranged so that the poles of the surfaces on the rotor winding portion 35 side are aligned. The other structures are the same as those of the second embodiment.

[0066] Fig. 9 It means that Figure 8 FIG. 3 is a diagram of magnetic flux passing through the rotor 3 when current is supplied to the rotor winding 352 of the rotor 3. When current is not supplied to the rotor winding 352, the magnetic flux generated by the rotor permanent magnet 36 passes through the magnetic path from the rotor permanent magnet 36 through the non-magnetic portion 351 and returns to the rotor permanent magnet 36. In other words, the magnetic flux generated by the rotor permanent magnet 36 is closed in the rotor 3. As a result, the voltage induced in the stator winding 22 by the rotation of the rotor 3 is reduced.

[0067] On the other hand, when current is supplied to the rotor winding 352, the direction of the magnetic flux generated by the rotor permanent magnet 36 is the same as the direction of the magnetic flux generated by the rotor winding 352. As a result, the voltage induced in the stator winding 22 by the rotation of the rotor 3 increases.

[0068] As described above, according to the rotor 3 of the rotary electric machine 1 of the third embodiment of the present invention, the rotor winding portion 35 is arranged at the center of the region between the pair of rotor permanent magnets 36 in the circumferential direction of the rotor core 34. Thus, when current is supplied to the rotor winding 352, the voltage induced in the stator winding 22 by the rotation of the rotor 3 can be increased. In addition, when current is not supplied to the rotor winding 352, the voltage induced in the stator winding 22 by the rotation of the rotor 3 can be reduced. As a result, the adjustment range of the magnetic flux from the rotor core 34 passing through the stator winding 22 can be expanded according to whether or not current is supplied to the rotor winding 352. Therefore, the efficiency of the rotary electric machine 1 can be improved, and the output of the rotary electric machine 1 can be increased.

[0069] The pair of rotor permanent magnets 36 are arranged so that the poles of the surfaces on the rotor winding portion 35 side are the same. Thus, the pair of rotor permanent magnets 36 can constitute the same magnetic pole in the rotor 3 .

[0070] Implementation 4

[0071] Fig.10 1 is a cross-sectional view showing a main part of the rotor of the rotating electric machine according to the fourth embodiment of the present invention. The rotor winding portion 35 is arranged on a straight line that passes through a region between a pair of rotor permanent magnets 36 in the circumferential direction of the rotor core 34 and extends in the radial direction of the rotor core 34. The rotor winding portion 35 is arranged so that the center of the rotor winding portion 35 in the radial direction of the rotor core 34 is located at a position radially inward of the rotor core 34 relative to the center of the rotor permanent magnets 36 in the radial direction of the rotor core 34. The other structures are the same as those in the third embodiment.

[0072] Fig.11 It means that Fig.10 FIG. 3 is a diagram of magnetic flux passing through the rotor 3 when current is supplied to the rotor winding 352 of the rotor 3. When current is not supplied to the rotor winding 352, the magnetic flux generated by the rotor permanent magnet 36 passes through the magnetic path from the rotor permanent magnet 36 through the non-magnetic portion 351 and returns to the rotor permanent magnet 36. In other words, the magnetic flux generated by the rotor permanent magnet 36 is closed in the rotor 3. As a result, the voltage induced in the stator winding 22 by the rotation of the rotor 3 is reduced.

[0073] On the other hand, when current is supplied to the rotor winding 352, the direction of the magnetic flux generated by the rotor permanent magnet 36 is the same as the direction of the magnetic flux generated by the rotor winding 352. As a result, the voltage induced in the stator winding 22 by the rotation of the rotor 3 increases.

[0074] As described above, according to the rotor 3 of the rotating electric machine 1 of the fourth embodiment of the present invention, the rotor winding portion 35 is arranged on a straight line that passes through the region between the pair of rotor permanent magnets 36 in the circumferential direction of the rotor core 34 and extends in the radial direction of the rotor core 34. In addition, the rotor winding portion 35 is arranged so that the center of the rotor winding portion 35 in the radial direction of the rotor core 34 is located at a position radially inward of the rotor core 34 relative to the center of the rotor permanent magnet 36 in the radial direction of the rotor core 34. Thus, when current is supplied to the rotor winding 352, the voltage induced in the stator winding 22 by the rotation of the rotor 3 can be increased. In addition, when current is not supplied to the rotor winding 352, the magnetic flux generated by the rotor permanent magnet 36 returns to the rotor permanent magnet 36 through the non-magnet portion 351. Therefore, when current is not supplied to the rotor winding 352, the voltage induced in the stator winding 22 can be further reduced. As a result, the adjustment range of the magnetic flux from the rotor core 34 passing through the stator winding 22 according to whether current is supplied to the rotor winding 352 can be further expanded. Therefore, the efficiency of the rotating electrical machine 1 can be further improved, and the output of the rotating electrical machine 1 can be further increased.

[0075] Implementation method 5

[0076] Fig.12 : This is a cross-sectional view of the main part of the rotor of the rotating electric machine according to the fifth embodiment of the present invention. The rotor winding portion 35 has a fixing member 354 which is arranged between the non-magnet portion 351 and the rotor core 34 and fixes the non-magnet portion 351 relative to the rotor core 34. As the fixing member 354, an adhesive can be cited, for example. The radially outer portion of the non-magnet portion 351 is fixed to the rotor core 34 via the fixing member 354. In other words, the surface of the non-magnet portion 351 facing radially outward becomes the fixed surface. The other structures are the same as those in the fourth embodiment. In addition, it is also possible to have a structure in which the radially inner portion of the non-magnet portion 351 is fixed to the rotor core 34 via the fixing member 354. In other words, it is also possible to have a structure in which the radially inner portion of the non-magnet portion 351 is fixed to the rotor core 34 via the fixing member 354. In other words, it is also possible to have a structure in which the radially inner portion of the non-magnet portion 351 facing radially inward becomes the fixed surface.

[0077] As described above, according to the rotor 3 of the rotating electrical machine 1 of the fifth embodiment of the present invention, the rotor winding portion 35 has a fixing member 354 that is provided between the non-magnet portion 351 and the rotor core 34 and fixes the non-magnet portion 351 to the rotor core 34. Thus, after laminating the plurality of magnetic steel plates constituting the rotor core 34, the rotor winding portion 35 can be inserted into the winding portion insertion hole 341. As a result, the productivity of the rotor 3 can be improved. In addition, the non-magnet portion 351 is fixed to the rotor core 34 via the fixing member 354. Thus, the rigidity of the rotor core 34 and the rotor winding portion 35 can be improved. As a result, the vibration resistance of the rotor 3 can be improved.

[0078] Implementation 6

[0079] Fig.13 1 is a cross-sectional view showing the main part of the rotor of the rotating electrical machine according to Embodiment 6 of the present invention. The non-magnet portion 351 includes a non-magnet portion main body 355 made of the same material as that constituting the rotor core 34 and an insulating member (not shown), which is provided between the non-magnet portion main body 355 and the rotor coil 352. The other structures are the same as those in Embodiment 5.

[0080] As described above, according to the rotor 3 of the rotating electrical machine 1 of the sixth embodiment of the present invention, the non-magnet portion 351 includes the non-magnet portion main body 355 made of the same material as that constituting the rotor core 34. Thus, the non-magnet portion main body 355 can be formed by punching the rotor core 34 constituting the magnetic steel sheet. As a result, the yield rate of the magnetic steel sheet can be improved.

[0081] Implementation 7

[0082] Fig.14 1 is a cross-sectional view showing a main part of a rotor of a rotating electrical machine according to a seventh embodiment of the present invention. A winding insertion hole 341 is formed in a rotor core 34. A rotor winding 35 is inserted into the winding insertion hole 341. Unlike the first embodiment, a magnet insertion hole 342 is not formed in the rotor core 34. Therefore, the rotor 3 does not include a rotor permanent magnet 36.

[0083] The rotor winding portion 35 has a non-magnet portion 351, a rotor winding 352 provided on the non-magnet portion 351, and a winding portion permanent magnet 353 provided on the non-magnet portion 351 separately from the rotor winding 352. The non-magnet portion 351 is fixed to the rotor core 34. The rotor winding 352 is fixed to the rotor core 34 via the non-magnet portion 351. The other structures are the same as those in the first embodiment.

[0084] As described above, according to the rotor 3 of the rotating electrical machine 1 of the seventh embodiment of the present invention, the rotor winding portion 35 includes the winding portion permanent magnet 353 provided in the non-magnet portion 351 separately from the rotor winding 352. Thus, the heat generated in the rotor winding 352 is prevented from being transferred to the winding portion permanent magnet 353. As a result, the temperature rise of the winding portion permanent magnet 353 can be suppressed. Therefore, the thermal demagnetization resistance characteristics of the winding portion permanent magnet 353 can be improved.

[0085] Furthermore, when a magnetic field in a direction opposite to the magnetization direction of the winding portion permanent magnet 353 is generated with respect to the winding portion permanent magnet 353, a current can be supplied to the rotor winding 352 to generate a magnetic field in a direction that suppresses the reverse magnetic field to the winding portion permanent magnet 353. Thus, the demagnetization characteristics of the winding portion permanent magnet 353 can be suppressed.

[0086] In addition, the non-magnet portion 351 is fixed to the rotor core 34, and the rotor winding 352 is fixed to the rotor core 34 via the non-magnet portion 351. Therefore, even when the size of the winding portion permanent magnet 353 is changed, the rotor core 34 can be used without changing the rotor core 34 by changing the shape of the non-magnet portion 351. Therefore, the mold manufacturing cost for manufacturing the rotor core 34 can be reduced.

[0087] Implementation 8

[0088] Fig.15 1 is a cross-sectional view showing a main part of a rotor of a rotating electrical machine according to an eighth embodiment of the present invention. A rotor winding portion 35 has an insulating member 356 provided between a non-magnet portion 351 and a rotor winding 352. The other structures are the same as those of the seventh embodiment.

[0089] As described above, according to rotor 3 of rotating electrical machine 1 of Embodiment 8 of the present invention, rotor winding portion 35 includes insulating member 356 provided between non-magnet portion 351 and rotor winding 352. Thus, insulation between rotor winding 352 and rotor core 34 can be improved.

[0090] Implementation method 9

[0091] Fig.16 1 is a cross-sectional view showing the main part of the rotor of the rotating electric machine according to the ninth embodiment of the present invention. The non-magnet portion 351 includes a non-magnet portion main body 355 made of the same material as that constituting the rotor core 34. In this example, the non-magnet portion 351 is the same as the non-magnet portion main body 355. Therefore, the non-magnet portion 351 is made of the same material as that constituting the rotor core 34. The other structures are the same as those of the eighth embodiment.

[0092] As described above, according to the rotor 3 of the rotating electrical machine 1 of the ninth embodiment of the present invention, the non-magnet portion 351 includes the non-magnet portion main body 355 made of the same material as that constituting the rotor core 34. Thus, the non-magnet portion main body 355 can be formed by punching the magnetic steel sheet constituting the rotor core 34. As a result, the yield of the magnetic steel sheet can be improved.

[0093] Embodiment 10

[0094] Fig.17: This is a cross-sectional view of the main parts of the rotor of the rotating electric machine according to the tenth embodiment of the present invention. The rotor winding portion 35 has a fixing member 354 which is arranged between the non-magnet portion 351 and the rotor core 34 and fixes the non-magnet portion 351 relative to the rotor core 34. As the fixing member 354, an adhesive can be cited, for example. The radially outer portion of the non-magnet portion 351 is fixed to the rotor core 34 via the fixing member 354. In other words, the surface of the non-magnet portion 351 facing radially outward becomes the fixed surface. The other structures are the same as those in the ninth embodiment. In addition, it is also possible to have a structure in which the radially inner portion of the non-magnet portion 351 is fixed to the rotor core 34 via the fixing member 354. In other words, it is also possible to have a structure in which the radially inner portion of the non-magnet portion 351 is fixed to the rotor core 34 via the fixing member 354. In other words, it is also possible to have a structure in which the radially inner portion of the non-magnet portion 351 facing radially inward becomes the fixed surface.

[0095] As described above, according to the rotor 3 of the rotating electrical machine 1 of the tenth embodiment of the present invention, the rotor winding portion 35 has the fixing member 354 which is provided between the non-magnet portion 351 and the rotor core 34 and fixes the non-magnet portion 351 to the rotor core 34. Thus, after laminating the plurality of magnetic steel plates constituting the rotor core 34, the rotor winding portion 35 can be inserted into the winding portion insertion hole 341. As a result, the productivity of the rotor 3 can be improved. In addition, the non-magnet portion 351 is fixed to the rotor core 34 via the fixing member 354. Thus, the rigidity of the rotor core 34 and the rotor winding portion 35 can be improved. As a result, the vibration resistance of the rotor 3 can be improved.

[0096] Implementation 11

[0097] Fig.18 1 is a cross-sectional view showing the main part of the rotor of the rotating electric machine according to the eleventh embodiment of the present invention. A line passing through the center of the rotor winding 352 and extending in the circumferential direction of the rotor core 34 is set as the center line A. A line passing through the center of the winding portion permanent magnet 353 and extending in the circumferential direction of the rotor core 34 is set as the center line B. The rotor winding 352 and the winding portion permanent magnet 353 are arranged so that the center line A and the center line B are located on the same line. In other words, the center of the rotor winding 352 in the radial direction of the rotor core 34 coincides with the center of the winding portion permanent magnet 353 in the radial direction of the rotor core 34. In addition, the center of the rotor winding 352 in the circumferential direction of the rotor core 34 coincides with the center of the winding portion permanent magnet 353 in the circumferential direction of the rotor core 34. The other structures are the same as those in the tenth embodiment.

[0098] As described above, according to the rotor 3 of the rotating electrical machine 1 of the eleventh embodiment of the present invention, the center line A passing through the center of the rotor winding 352 and extending in the circumferential direction and the center line B passing through the center of the winding portion permanent magnet 353 and extending in the circumferential direction are located on the same line. Thus, by adjusting the value of the current supplied to the rotor winding 352, the amount of magnetic flux generated by the rotor winding 352 and the winding portion permanent magnet 353 can be adjusted. In addition, even when the amount of magnetic flux generated by the rotor winding 352 changes relative to the amount of magnetic flux generated by the winding portion permanent magnet 353, the symmetry of the magnetic flux generated by the rotor winding 352 and the winding portion permanent magnet 353 in the circumferential direction can be maintained. As a result, the torque pulsation of the rotating electrical machine 1 can be reduced, and the iron loss of the rotating electrical machine 1 can be reduced.

[0099] Implementation 12

[0100] Fig.19 1 is a cross-sectional view showing the main part of the rotor of the rotating electric machine according to Embodiment 12 of the present invention. The rotor core 34 is divided into an inner diameter side core portion 343 and an outer diameter side core portion 344. In other words, the rotor core 34 has an inner diameter side core portion 343 and an outer diameter side core portion 344. The outer diameter side core portion 344 is arranged at a position radially outward of the inner diameter side core portion 343. Fig. 20 Yes means Fig.19 A three-dimensional view of the inner diameter side iron core portion 343. Fig.21 Yes means Fig.19 The inner diameter side core portion 343 and the outer diameter side core portion 344 are respectively formed in a manner extending in the axial direction. By moving the inner diameter side core portion 343 relative to the outer diameter side core portion 344 in the axial direction, the outer diameter side core portion 344 is attached and detached relative to the inner diameter side core portion 343. The inner diameter side core portion 343 and the outer diameter side core portion 344 are fixed to each other by shrink fit, press fit, etc.

[0101] like Fig.19 As shown, the rotor winding 352 is fixed to the inner diameter side core portion 343 via a non-magnet portion 351 made of insulating resin. Examples of the non-magnet portion 351 include a bobbin, insulating paper, and the like.

[0102] The radially outer core portion 344 is disposed in a region radially outward of the rotor winding 352. The radially outer core portion 344 restricts the rotor winding 352 from moving radially outward when centrifugal force acts on the rotor winding 352.

[0103] The material of the inner diameter side core portion 343 and the material of the outer diameter side core portion 344 are the same. The inner diameter side core portion 343 and the outer diameter side core portion 344 are formed by co-pressing using a die. Thus, the yield rate of the inner diameter side core portion 343 and the outer diameter side core portion 344 can be improved.

[0104] The outer diameter side core portion 344 is formed with a fastening portion 345. When the inner diameter side core portion 343 and the outer diameter side core portion 344 are stamped together, the magnetic steel plates constituting the outer diameter side core portion 344 are fixed in the axial direction using the fastening portion 345. The other structures are the same as those of the seventh to eleventh embodiments.

[0105] As described above, according to the rotor 3 of the rotating electrical machine 1 of the embodiment 12 of the present invention, the rotor core 34 has the inner diameter side core portion 343 and the outer diameter side core portion 344. The outer diameter side core portion 344 restricts the rotor winding 352 from moving radially outward. Thus, the rotor winding 352 can be installed from the radially outer side to the radially inner side relative to the inner diameter side core portion 343. Therefore, the magnet insertion process of inserting the winding portion permanent magnet 353 into the inner diameter side core portion 343 and the rotor winding portion insertion process of inserting the rotor winding 352 into the inner diameter side core portion 343 can be set as different processes from each other. As a result, it is no longer necessary to use a magnetizer for post-magnetization. Thus, it is possible to suppress the generation of induced voltage in the rotor winding 352 due to post-magnetization using a magnetizer. In the case where a high coercive force magnet such as a neodymium magnet is used for the winding portion permanent magnet 353, the high magnetomotive force will instantly affect the rotor winding 352. In this case, insulation breakdown may occur in the rotor winding 352 due to the induced voltage generated in the rotor winding 352. On the other hand, in the twelfth embodiment, since post-magnetization using a magnetizer is not required, the influence on the rotor winding 352 disappears.

[0106] Description of Reference Numerals

[0107] 1 rotating electrical machine, 2 stator, 3 rotor, 21 stator core, 22 stator winding, 31 shaft, 32 bearing, 33 slip ring, 34 rotor core, 35 rotor winding portion, 36 rotor permanent magnet, 37 end plate, 101 battery, 102 power circuit portion, 103 control circuit portion, 341 winding portion insertion hole, 342 magnet insertion hole, 343 inner diameter side core portion, 344 outer diameter side core portion, 345 fastening portion, 351 non-magnet portion, 352 rotor winding, 353 winding portion permanent magnet, 354 fixing member, 355 non-magnet portion main body, 356 insulating member.

Claims

1. A rotor of a rotating electrical machine, wherein: have: A rotor core having a magnet insertion hole formed therein; a rotor winding portion, which is disposed on the rotor core; and a rotor permanent magnet, which is inserted into the magnet insertion hole, The rotor winding part has: a non-magnetic portion composed of a magnetic member other than a permanent magnet or a non-magnetic member; a rotor winding disposed on the non-magnet portion; and a winding permanent magnet, which is provided in the non-magnetic part separately from the rotor winding, When a direction perpendicular to the winding direction of the rotor winding portion is defined as a winding axial direction, the rotor winding portion is arranged so that the winding axial direction coincides with a radial direction of the rotor core. The non-magnet portion has a fixing surface fixed to the rotor core. The rotor winding is fixed to the rotor core via the non-magnet portion. The rotor core is provided with an insertion hole for a winding portion. The rotor winding part is inserted into the winding part insertion hole, The fixing surface is fixed to the inner surface of the winding insertion hole.

2. The rotor of a rotating electrical machine according to claim 1, wherein: The non-magnet portion has the fixing surface facing the axial direction of the winding.

3. The rotor of a rotating electrical machine according to claim 1 or 2, wherein: The winding insertion hole is formed in the undivided rotor core.

4. The rotor of a rotating electrical machine according to claim 1 or 2, wherein: In the rotor core, a pair of magnet insertion holes are formed in a row in the circumferential direction of the rotor core. A pair of the rotor permanent magnets are respectively inserted into each of the pair of magnet insertion holes. The rotor winding portion is arranged at the center of a region between a pair of the rotor permanent magnets in the circumferential direction.

5. The rotor of a rotating electrical machine according to claim 4, wherein: The pair of rotor permanent magnets are arranged so that the polarities of the surfaces facing the rotor winding portion are the same.

6. The rotor of a rotating electrical machine according to claim 1 or 2, wherein: In the rotor core, a pair of magnet insertion holes are formed in a row in the circumferential direction of the rotor core. A pair of the rotor permanent magnets are respectively inserted into each of the pair of magnet insertion holes. The rotor winding portion is arranged on a straight line that passes through a region between a pair of the rotor permanent magnets in the circumferential direction and extends in a radial direction of the rotor core. The rotor winding portion is arranged such that a center of the rotor winding portion in the radial direction is located radially inward of a center of the rotor permanent magnet in the radial direction.

7. The rotor of a rotating electrical machine according to claim 1 or 2, wherein: The rotor winding portion further includes a fixing member that is provided between the non-magnet portion and the rotor core and fixes the non-magnet portion to the rotor core.

8. The rotor of a rotating electrical machine according to claim 1 or 2, wherein: In the case where the non-magnet portion is composed of a magnetic member other than a permanent magnet, the non-magnet portion includes a non-magnet portion main body composed of the same material as that constituting the rotor core.

9. A rotor of a rotating electrical machine, wherein: have: a rotor core; and a rotor winding portion, which is arranged on the rotor core, The rotor winding part has: a non-magnetic portion composed of a magnetic member other than a permanent magnet or a non-magnetic member; a rotor winding disposed on the non-magnet portion; and a winding permanent magnet, which is provided in the non-magnetic part separately from the rotor winding, When a direction perpendicular to the winding direction of the rotor winding portion is defined as a winding axial direction, the rotor winding portion is arranged so that the winding axial direction coincides with a radial direction of the rotor core. The non-magnet portion has a fixing surface fixed to the rotor core. The rotor winding is fixed to the rotor core via the non-magnet portion.

10. The rotor of a rotating electrical machine according to claim 9, wherein: The rotor winding portion can be inserted into the rotor core from the radial outside. The rotor core has: an inner diameter side iron core portion having a magnet insertion hole formed therein for inserting the permanent magnet of the winding portion; and an outer diameter side iron core portion, which is arranged radially outward of the inner diameter side iron core portion, The radially outer core portion restricts the rotor winding portion from moving radially outward from the radially inner core portion.

11. The rotor of a rotating electrical machine according to claim 9, wherein: The rotor core is provided with an insertion hole for a winding portion. The rotor winding part is inserted into the winding part insertion hole, The fixing surface is fixed to the inner surface of the winding insertion hole.

12. The rotor of a rotating electrical machine according to any one of claims 9 to 11, wherein: The rotor winding unit further includes an insulating member that supports the rotor winding.

13. The rotor of a rotating electrical machine according to any one of claims 9 to 11, wherein: In the case where the non-magnet portion is composed of a magnetic member other than a permanent magnet, the non-magnet portion includes a non-magnet portion main body composed of the same material as that constituting the rotor core.

14. The rotor of a rotating electrical machine according to any one of claims 9 to 11, wherein: The rotor winding portion further includes a fixing member that is provided between the non-magnet portion and the rotor core and fixes the non-magnet portion to the rotor core.

15. The rotor of a rotating electrical machine according to any one of claims 9 to 11, wherein: The rotor winding and the winding permanent magnet are arranged so that a center line passing through the center of the rotor winding and extending in a tangential direction of the circumferential direction of the rotor core and a center line passing through the center of the winding permanent magnet and extending in a tangential direction of the circumferential direction are located on the same line.

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