JP5772322B2 - Rotating electric machine with speed change mechanism - Google Patents

Description

  The present invention relates to a rotating electrical machine with a speed change mechanism.

  Conventionally, a rotating electrical machine has been used as a power source in various fields. The power generated in the rotor of the rotating electrical machine is often used to drive a load after being shifted by a speed change mechanism. As the speed change mechanism, the one using a mechanical gear mechanism is the mainstream. However, with the recent improvement in performance of magnets, a speed change mechanism using a magnetic gear mechanism has been developed. It is disclosed in Non-Patent Document 1. The magnetic gear speed change mechanism of Patent Literature 1 and Non-Patent Literature 1 is a magnetic wave gear mechanism, and a large reduction ratio can be obtained even with a small size.

JP 2010-106940 A

K. Atallah et al., “Design, analysis and realization of a high-performance magnetic gear”, IEE Proc.-Elecr. Power Appl., Vol. 151, No. 2, March, 2004

  In the magnetic gear transmission mechanism of Patent Document 1 and Non-Patent Document 1, torque is transmitted using the field magnetic flux of the permanent magnet, but the amount of field magnetic flux of the permanent magnet does not change even when the transmitted torque is small. This causes extra field magnetic flux to flow, which causes an increase in loss. In order to efficiently transmit power when the power generated in the rotor of the rotating electrical machine is shifted and transmitted by the magnetic gear transmission mechanism, the transmission of the magnetic gear transmission mechanism is performed in accordance with the increase in torque generated in the rotor. It is desirable to be able to increase torque capacity.

  The present invention increases the transmission torque capacity of a magnetic gear transmission mechanism in accordance with an increase in torque generated in the rotor when the power generated in the rotor of the rotating electrical machine is shifted and transmitted by the magnetic gear transmission mechanism. The purpose is to perform power transmission efficiently.

  The rotating electrical machine with a speed change mechanism according to the present invention employs the following means in order to achieve the above-described object.

  A rotating electrical machine with a speed change mechanism according to the present invention includes an induction machine including a stator provided with a stator winding, a rotor provided with the rotor winding, and an input-side magnetic gear coupled to the rotor. And an output side magnetic gear element that rotates in conjunction with the input side magnetic gear element, and includes a magnetic gear speed change mechanism that shifts and outputs the power of the rotor. The output side magnetic gear element rotates around its central axis in conjunction with the rotation of the side magnetic gear element and rotates around the central axis of the input side magnetic gear element, and the number of poles of the input side magnetic gear element is the output side. Any one or more of the number of poles of the magnetic gear element and different conditions are satisfied, the field winding is provided in the input side magnetic gear element, and the current flows in the field winding to cause the input side magnetic gear element to Magnetic poles are formed, and field winding and rotor winding are shared The rest are summarized as being connected.

  In one aspect of the present invention, the field winding and the rotor winding are connected via a rectification circuit, and the rectification circuit rectifies the alternating current of the rotor winding into a direct current and flows it to the field winding. Is preferred.

  In one aspect of the present invention, a magnetic gear speed change mechanism includes a ring magnetic gear element whose rotation is fixed, a sun magnetic gear element disposed inside the ring magnetic gear element as an input side magnetic gear element, and an output side magnetic gear element. The gear element preferably includes a planetary magnetic gear element rotatably supported on the output shaft and magnetically coupled to the ring magnetic gear element and the sun magnetic gear element.

  According to the present invention, the torque generated in the rotor of the induction machine and the field magnetic flux generated in the input-side magnetic gear element of the magnetic gear transmission mechanism are in a proportional relationship, and the magnetic force is increased according to the increase in the torque generated in the rotor. By increasing the transmission torque capacity of the gear transmission mechanism, power transmission by the magnetic gear transmission mechanism can be performed efficiently.

It is a figure which shows schematic structure of the rotary electric machine with a transmission mechanism which concerns on embodiment of this invention. It is a figure which shows schematic structure of the rotary electric machine with a transmission mechanism which concerns on embodiment of this invention. It is a figure which shows schematic structure of the rotary electric machine with a transmission mechanism which concerns on embodiment of this invention. It is a figure which shows schematic structure of the rotary electric machine with a transmission mechanism which concerns on embodiment of this invention. It is a figure which shows the other schematic structure of the rotary electric machine with a transmission mechanism which concerns on embodiment of this invention. It is a figure which shows the other schematic structure of the rotary electric machine with a transmission mechanism which concerns on embodiment of this invention. It is a figure which shows the other schematic structure of the rotary electric machine with a transmission mechanism which concerns on embodiment of this invention. It is a figure which shows the other schematic structure of the rotary electric machine with a transmission mechanism which concerns on embodiment of this invention. It is a figure which shows the other schematic structure of the rotary electric machine with a transmission mechanism which concerns on embodiment of this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described with reference to the drawings.

  1-4 is a figure which shows schematic structure of the rotary electric machine with a transmission mechanism which concerns on embodiment of this invention, FIG. 1 is sectional drawing which shows the outline of the internal structure seen from the direction orthogonal to the input shaft 20, 2 is a cross-sectional view taken along the line AA of FIG. 1, FIG. 3 is a cross-sectional view taken along the line BB of FIG. 1, and FIG. The rotating electrical machine with a speed change mechanism according to the present embodiment includes an induction machine 10 and a magnetic gear speed change mechanism 40.

  The induction machine 10 includes a stator 12 that is fixed to the casing 11 and whose rotation is fixed, and a rotor 14 that is mechanically connected to the input shaft 20 and is rotatable relative to the stator 12. In the example shown in FIGS. 1 and 2, the stator 12 and the rotor 14 are arranged to face each other with a predetermined minute gap in the radial direction orthogonal to the input shaft 20, and the stator 12 is arranged at a position radially outside the rotor 14. Yes. The stator 12 includes a stator core 21 and a plurality of (for example, three-phase) stator windings 22 disposed on the stator core 21 along the circumferential direction thereof. In the stator core 21, a plurality of stator teeth 23 protruding radially inward (toward the rotor 14) are arranged at regular intervals (equally spaced) along the circumferential direction, and between the stator teeth 23. A slot is formed. The stator windings 22 are wound around the stator teeth 23 through the slots between the stator teeth 23, so that the stator 12 has a magnetic pole. The current flowing through the stator winding 22 is controlled by the control circuit 30. The control circuit 30 includes, for example, an inverter, and can control the amplitude and phase angle of the alternating current that flows through the stator winding 22 by switching control of the inverter.

  The rotor 14 includes a rotor core 31 and a shared winding 72 used as a rotor winding of a plurality of phases (for example, three phases) disposed on the rotor core 31 along the circumferential direction thereof. In the rotor core 31, a plurality of rotor teeth 33 projecting radially outward (toward the stator 12) are arranged at regular intervals (equally spaced) along the circumferential direction, and between the rotor teeth 33. A slot is formed. The shared winding 72 is wound around the rotor teeth 33 through the slots between the rotor teeth 33, whereby a magnetic pole is formed on the rotor 14. Since the stator teeth 23 and the rotor teeth 33 are arranged opposite to each other in the circumferential direction, the stator 12 and the rotor 14 are magnetically coupled over the entire circumference in the circumferential direction.

  The magnetic gear speed change mechanism 40 includes a ring magnetic gear 42 fixed in rotation by being fixed to the casing 11, and a sun magnetism as an input side magnetic gear element disposed on the inner side (radially inner side) of the ring magnetic gear 42. The output side magnetic gear elements are arranged between the ring magnetic gear 42 and the sun magnetic gear 41, with the gear 41 and the ring magnetic gear 42 being arranged at regular intervals (equally spaced) along the circumferential direction of the ring magnetic gear 42. And a plurality of (four in the example shown in FIG. 3) pinion magnetic gears (planetary magnetic gears) 43, and an output shaft 44 that functions as a carrier that rotatably supports each pinion magnetic gear 43. Mechanism. The center axes of the ring magnetic gear 42 and the sun magnetic gear 41 coincide with each other. The central axis of each pinion magnetic gear 43 is parallel to the central axes of the ring magnetic gear 42 and the sun magnetic gear 41 and is arranged at a predetermined distance.

  The ring magnetic gear 42 includes a core member 61 and a plurality of permanent magnets 62 disposed on the inner peripheral surface of the core member 61. The magnetization directions of the plurality of permanent magnets 62 are set so that the magnetic poles alternate in the circumferential direction of the ring magnetic gear 42 (N poles and S poles are alternately arranged). Each pinion magnetic gear 43 includes a core member 63 and a plurality of permanent magnets 64 disposed on the outer peripheral surface of the core member 63. The magnetization directions of the plurality of permanent magnets 64 are set so that the magnetic poles alternate in the circumferential direction of the pinion magnetic gear 43 (N poles and S poles are alternately arranged). A part of the permanent magnet 64 of each pinion magnetic gear 43 is opposed to a part of the permanent magnet 62 of the ring magnetic gear 42 with a minute gap therebetween, so that each pinion magnetic gear 43 is part of the ring magnetic gear 42 in the circumferential direction. Magnetically coupled. It is possible to transmit torque between each pinion magnetic gear 43 and the ring magnetic gear 42 using the magnetic force acting on the magnetic coupling portion 47. As each pinion magnetic gear 43 rotates relative to the ring magnetic gear 42, the magnetically coupled permanent magnets 62 and 64 are switched.

  The sun magnetic gear 41 is mechanically connected to the rotor 14 of the induction machine 10 via the input shaft 20 by being mechanically connected to the input shaft 20. The outer diameter of the sun magnetic gear 41 is set equal to the outer diameter of the rotor 14. The sun magnetic gear 41 includes a core member 51 and a shared winding 72 used as a field winding of a plurality of phases (for example, three phases) disposed on the core member 51 along the circumferential direction thereof. In the core member 51, a plurality of teeth 53 projecting radially outward (toward each pinion magnetic gear 43) are arranged at regular intervals (equally spaced) along the circumferential direction. Slots are formed between them. The total number of teeth 53 of the sun magnetic gear 41 is equal to the total number of rotor teeth 33 (the number of poles of the sun magnetic gear 41 is equal to the number of poles of the rotor 14), and the positions of the teeth 53 and the rotor teeth 33 in the circumferential direction are the same. Arranged without shifting from each other.

  In the present embodiment, the shared winding 72 passes through not only the slots between the rotor teeth 33 but also the slots between the teeth 53, and is wound not only on the rotor teeth 33 but also on the teeth 53, whereby the sun magnetic gear 41. A magnetic pole is formed. That is, the field winding of the sun magnetic gear 41 and the rotor winding of the induction machine 10 are shared by the shared winding 72. A part of the permanent magnet 64 of each pinion magnetic gear 43 is opposed to a part of the teeth 53 of the sun magnetic gear 41 with a minute gap therebetween, so that each pinion magnetic gear 43 partially opposes the sun magnetic gear 41 in the circumferential direction. Magnetically coupled to It is possible to transmit torque between each pinion magnetic gear 43 and the sun magnetic gear 41 by using the magnetic force acting on the magnetic coupling portion 48. As the pinion magnetic gear 43 and the sun magnetic gear 41 rotate relative to each other, the magnetically coupled permanent magnet 64 and the tooth 53 are switched. The sun magnetic gear 41, the ring magnetic gear 42, and each pinion magnetic gear 43 have the same ratio of the number of poles to the diameter (the sun magnetic gear 41 and the pinion magnetic gear 43 are the outer diameter and the ring magnetic gear 42 is the inner diameter). As described above, the number of poles and the diameter of the sun magnetic gear 41, the ring magnetic gear 42, and each pinion magnetic gear 43 are set. In the example shown in FIG. 3, the three teeth 53 in the sun magnetic gear 41 correspond to one magnetic pole.

  In the induction machine 10, a rotating magnetic field that rotates in the circumferential direction is generated in the stator 12 when a plurality of phases (for example, three phases) of alternating current flows through the stator winding 22 of a plurality of phases (for example, three phases). In response to the rotating magnetic field generated in the stator 12 acting on the rotor 14, an induced electromotive force is generated in the shared winding 72 disposed in the rotor 14, and an induced current (alternating current) flows. Due to the electromagnetic interaction between the rotating magnetic field and the induced current, torque acts on the rotor 14 from the stator 12, and the rotor 14 is rotationally driven together with the input shaft 20 and the sun magnetic gear 41. In this way, the induction machine 10 can be made to function as an electric motor that generates power (mechanical power) in the rotor 14 using electric power supplied to the stator windings 22. The control circuit 30 controls the torque acting between the stator 12 and the rotor 14 of the induction machine 10 by controlling the amplitude and phase angle of the alternating current flowing through the stator winding 22 by switching control of the inverter, for example. Can do.

  Further, in the magnetic gear speed change mechanism 40, a magnetic pole is formed on the sun magnetic gear 41 when an induced current flows through the common winding 72 (field winding). A magnetic coupling portion between each pinion magnetic gear 43 and the sun magnetic gear 41 is generated by electromagnetic interaction between the magnetic field of the permanent magnet 64 of each pinion magnetic gear 43 and the induced current of the common winding 72 of the sun magnetic gear 41. Torque acts on 48. Accordingly, in conjunction with the rotation of the sun magnetic gear 41, each pinion magnetic gear 43 rotates (rotates) around its central axis. At that time, each pinion magnetic gear 43 rotates around the central axis of the sun magnetic gear 41 by applying a torque to the magnetic coupling portion 47 between each pinion magnetic gear 43 and the ring magnetic gear 42 whose rotation is fixed. The output shaft 44 that rotates (revolves) and rotates and supports each pinion magnetic gear 43 is driven to rotate. As a result, the power generated in the rotor 14 of the induction machine 10 can be shifted (decelerated) and output from the output shaft 44, and the magnetic gear transmission mechanism 40 functions as a speed reducer.

  Here, in the induction machine 10, when the rotational speed of the rotating magnetic field formed on the stator 12 is Ne, the rotational speed of the rotor 14 is Nm, and the slip is s, the following equation (1) is established, and the magnetic gear transmission mechanism: 40, when the number of poles of the sun magnetic gear 41 is Zs, the number of poles of each pinion magnetic gear 43 is Zp, and the number of poles of the ring magnetic gear 42 is Zr, the following equation (2) is established.

Ne = Nm / (1-s) (1)
Zr = Zs + 2 × Zp (2)

  From the equations (1) and (2), the following (3), (4) regarding the rotational speed Ns (= Nm) of the sun magnetic gear 41, the rotational speed Np of each pinion magnetic gear 43, and the rotational speed Nc of the output shaft 44. ) Is established. The gear ratio (reduction ratio) Ns / Nc in the magnetic gear transmission mechanism 40 is 2 × (Zs + Zp) / Zs × (1−s) from the equation (4).

Np = Zs / Zp × Ns / (1-s) (3)
Nc = Zs / (2 × (Zs + Zp)) × Ns / (1-s) (4)

  In the induction machine 10, the magnitude of the alternating current flowing through the rotor winding is proportional to the torque generated in the rotor 14. In the magnetic gear transmission mechanism 40, the magnitude of the field current flowing through the field winding of the sun magnetic gear 41. Is proportional to the transmission torque capacity. In the present embodiment, the field winding of the sun magnetic gear 41 and the rotor winding of the induction machine 10 are shared by the common winding 72, and are shared by the field winding of the sun magnetic gear 41 and the rotor winding of the induction machine 10. Therefore, the torque generated in the rotor 14 and the field magnetic flux amount of the sun magnetic gear 41 have a proportional relationship, and the transmission torque capacity of the magnetic gear transmission mechanism 40 increases as the torque generated in the rotor 14 increases. To do. The control circuit 30 controls the amplitude and phase angle of the alternating current flowing through the stator winding 22, so that both the torque generated in the rotor 14 and the transmission torque capacity of the magnetic gear transmission mechanism 40 have this proportional relationship. Control while keeping. When the current flowing through the common winding 72 is small and the torque generated in the rotor 14 is small, the transmission torque capacity of the magnetic gear transmission mechanism 40 is reduced without the sun magnetic gear 41 generating an extra field magnetic flux. The power of the rotor 14 is efficiently decelerated by the magnetic gear transmission mechanism 40 and output from the output shaft 44. On the other hand, when the current flowing through the common winding 72 is large and the torque generated in the rotor 14 is large, the sun magnetic gear 41 generates a field magnetic flux sufficient for large torque transmission, and the transmission torque capacity of the magnetic gear transmission mechanism 40 is large. Therefore, the power of the rotor 14 is decelerated by the magnetic gear transmission mechanism 40 without being greatly reduced, and is output from the output shaft 44.

  Thus, according to the present embodiment, the field winding of the sun magnetic gear 41 and the rotor winding of the induction machine 10 are shared by the common winding 72, so that the transmission torque capacity of the magnetic gear transmission mechanism 40 can be increased. It can be controlled in proportion to the torque generated in the rotor 14, and the power of the rotor 14 can be efficiently decelerated by the magnetic gear transmission mechanism 40 and output from the output shaft 44. Furthermore, the induction machine 10 and the magnetic gear speed change mechanism 40 can be easily integrated, and the manufacturing cost can be reduced. In this case, if the number of poles of the sun magnetic gear 41 is equal to the number of poles of the rotor 14, the sun magnetic gear 41 and the rotor 14 can be configured using the iron core having the same cross-sectional shape, thereby further reducing the manufacturing cost. Can do. Further, even when torque is applied from the magnetic gear speed change mechanism 40 side, the field current (induction current) flows through the common winding 72. Therefore, the induction machine 10 can also function as a generator, and the regenerative operation of the induction machine 10 can be performed. Is possible.

  Next, another configuration example of this embodiment will be described.

  In the configuration example shown in FIG. 5, the rotor winding 32 of the induction machine 10 passes through the slot between the rotor teeth 33 and is wound around the rotor teeth 33, so that the rotor 14 has a magnetic pole, and the magnetic gear speed change mechanism 40. Are wound around the teeth 53 through the slots between the teeth 53, so that a magnetic pole is formed on the sun magnetic gear 41. The rotor winding 32 disposed on the rotor 14 and the field winding 52 disposed on the sun magnetic gear 41 are electrically connected via a connection terminal 74 attached to the input shaft 20. . According to the configuration example shown in FIG. 5, the number of poles of the sun magnetic gear 41 is different from the number of poles of the rotor 14 (the total number of teeth 53 of the sun magnetic gear 41 is different from the total number of rotor teeth 33). The relationship of the transmission torque capacity of the magnetic gear transmission mechanism 40 with respect to the torque of 14 can be adjusted, and the degree of freedom in designing the magnetic gear transmission mechanism 40 is increased.

  In addition, for example, as shown in FIG. 6, the axial length of the magnetic gear speed change mechanism 40 is made different from the axial length of the induction machine 10, more specifically, the magnetic force of the sun magnetic gear 41 and the pinion magnetic gear 43 is changed. The axial length of the coupling portion 48 and the axial length of the magnetic coupling portion 47 of the ring magnetic gear 42 and the pinion magnetic gear 43 are different from the axial length of the opposing portions of the stator 12 and the rotor 14. You can also. In the example shown in FIG. 6, the axial length of the magnetic coupling portion 48 between the sun magnetic gear 41 and the pinion magnetic gear 43 and the axial length of the magnetic coupling portion 47 between the ring magnetic gear 42 and the pinion magnetic gear 43. Is longer than the axial length of the facing portion of the stator 12 and the rotor 14. According to the configuration example shown in FIG. 6, the transmission torque capacity of the magnetic gear transmission mechanism 40 can be increased with respect to the torque of the rotor 14, and the degree of freedom in designing the magnetic gear transmission mechanism 40 is increased.

  For example, as shown in FIG. 7, the outer diameter of the sun magnetic gear 41 of the magnetic gear speed change mechanism 40 can be made different from the outer diameter of the rotor 14 of the induction machine 10. Although FIG. 7 shows an example in which the outer diameter of the sun magnetic gear 41 is smaller than the outer diameter of the rotor 14, the outer diameter of the sun magnetic gear 41 can be made larger than the outer diameter of the rotor 14. Also in the configuration example shown in FIG. 7, the relationship of the transmission torque capacity of the magnetic gear transmission mechanism 40 to the torque of the rotor 14 can be adjusted, and the degree of freedom in designing the magnetic gear transmission mechanism 40 is increased.

  8 and 9, a rectifier circuit 76 in which a rotor winding 32 disposed in the rotor 14 and a field winding 52 disposed in the sun magnetic gear 41 are attached to the input shaft 20. It is electrically connected via. Here, the rectifier circuit 76 rectifies the alternating current of the rotor winding 32 into a direct current and passes it through the field winding 52. More specifically, the rectifier circuit 76 is configured by a diode bridge, and is provided corresponding to each phase 32U, 32V, 32W of the rotor winding 32, and is connected in parallel to each other (three in FIG. 9). ) Rectifying arms 83, 84, 85. In the rectifying arm 83, a midpoint 86 between a pair of diodes (rectifying elements) D11 and D12 connected in series and one end of the rotor winding 32U are electrically connected. Similarly, in the rectifying arm 84, the midpoint 87 between the pair of diodes D13 and D14 connected in series and one end of the rotor winding 32V are electrically connected, and in the rectifying arm 85, 1 connected in series. A midpoint 88 between the pair of diodes D15 and D16 and one end of the rotor winding 32W are electrically connected. The other ends of the rotor windings 32U, 32V, 32W are electrically connected to each other. One end of the field winding 52N is electrically connected to the cathode end of the rectifying arms 83, 84, 85 (diodes D11, D13, D15), and one end of the field winding 52S is connected to the rectifying arms 83, 84, 85 (diodes). D12, D14, D16) are electrically connected to the anode end. The other ends of the field windings 52N and 52S are electrically connected to each other. The rectifier circuit 76 can rectify the three-phase alternating currents of the rotor windings 32U, 32V, and 32W into direct currents by the diodes (rectifier elements) D11 to D16 and flow the currents through the field windings 52N and 52S.

  The field windings 52N and 52S are wound around the teeth 53 so that the field windings 52N and the field windings 52S are alternately arranged in the circumferential direction of the sun magnetic gear 41. Furthermore, when a direct current flows through the field windings 52N and 52S, the teeth 53 around which the field winding 52N is wound and the teeth 53 around which the field winding 52S is wound have mutually different magnetization directions. The winding directions of the field windings 52N and 52S around the teeth 53 are set so that magnets having different magnetic poles are formed in the opposite direction. As a result, when a direct current flows through the field windings 52N and 52S, magnets with fixed magnetic poles are formed on the teeth 53 so that N poles and S poles are alternately arranged in the circumferential direction of the sun magnetic gear 41. Is done. In the example shown in FIG. 8, one tooth 53 in the sun magnetic gear 41 corresponds to one magnetic pole.

  8 and 9, when an induction current flows through the rotor winding 32 of the induction machine 10 and torque is generated in the rotor 14, the rectification circuit 76 rectifies the field winding 52 of the sun magnetic gear 41. When a direct current flows, a magnet having a magnetic pole fixed to each tooth 53 of the sun magnetic gear 41 is formed. The magnetic force between each pinion magnetic gear 43 and the sun magnetic gear 41 is obtained by the attraction and repulsion of the magnetic field of the permanent magnet 64 of each pinion magnetic gear 43 and the magnetic field of the magnet formed on the teeth 53 of the sun magnetic gear 41. Torque acts on the connecting portion 48. Accordingly, in conjunction with the rotation of the sun magnetic gear 41, each pinion magnetic gear 43 rotates (rotates) around its central axis. Further, as described above, torque acts on the magnetic coupling portion 47 between each pinion magnetic gear 43 and the ring magnetic gear 42 whose rotation is fixed, so that each pinion magnetic gear 43 becomes the central axis of the sun magnetic gear 41. By rotating around (revolving), the power generated in the rotor 14 is decelerated and output from the output shaft 44.

  8 and 9, the torque generated in the rotor 14 and the amount of field magnetic flux of the sun magnetic gear 41 are in a proportional relationship, and the amplitude and phase angle of the alternating current that flows through the stator winding 22 by the control circuit 30 are determined. By controlling, both the torque generated in the rotor 14 and the transmission torque capacity of the magnetic gear transmission mechanism 40 are controlled while maintaining a proportional relationship. Further, according to the configuration examples shown in FIGS. 8 and 9, since the magnetic field rotates in synchronism with the sun magnetic gear 41 and each pinion magnetic gear 43, the torque transmission efficiency can be further improved. Further, the field winding 52 is directly applied to the teeth 53 of the sun magnetic gear 41, whereby concentrated winding is possible and the manufacture of the sun magnetic gear 41 is facilitated. Further, since the induction current is not generated on the magnetic gear transmission mechanism 40 side (the sun magnetic gear 41 side), the degree of freedom of the shape of the sun magnetic gear 41 is increased. For example, the sun magnetic gear 41 can be configured as a claw pole type.

  In the above description, the example in which the magnetic gear transmission mechanism 40 is a planetary magnetic gear mechanism and the rotation of the ring magnetic gear 42 is fixed has been described. However, in this embodiment, it is also possible to fix the rotation of the carrier that rotatably supports each pinion magnetic gear 43 without fixing the rotation of the ring magnetic gear 42. In this case, the ring magnetic gear 42 functions as an output-side magnetic gear element, and the number of poles of the ring magnetic gear 42 is different from the number of poles of the sun magnetic gear 41 (the number of poles of the ring magnetic gear 42 is different from that of the sun magnetic gear 41). The power generated in the rotor 14 is decelerated and output from the ring magnetic gear 42. In the present embodiment, the magnetic gear speed change mechanism 40 can be constituted by a magnetic gear mechanism other than the planetary magnetic gear mechanism. For example, the magnetic gear speed change mechanism 40 may be configured to include an input side magnetic gear element mechanically coupled to the rotor 14 and an output side magnetic gear element magnetically coupled to the input side magnetic gear element. is there. In that case, the input-side magnetic gear element can be configured with the same structure as the sun magnetic gear 41, and the output-side magnetic gear element can be configured with the same structure as the pinion magnetic gear 43. By making the number of poles and diameter different from the number of poles and diameter of the input side magnetic gear element (for example, making the number of poles and diameter of the output side magnetic gear element larger than the number of poles and diameter of the input side magnetic gear element), the rotor 14 The power generated in the gear is shifted (decelerated) and output from the output side magnetic gear element. In the present embodiment, the magnetic gear speed change mechanism 40 may be a speed increasing mechanism that speeds up and outputs the power generated in the rotor 14 in addition to the speed reducing mechanism.

  In the present embodiment, for example, the magnetic wave gear mechanism disclosed in Patent Document 1, Non-Patent Document 1, and the like can be applied to the magnetic gear transmission mechanism 40. In this case, the magnetic wave gear mechanism includes an input-side magnetic gear element mechanically coupled to the rotor 14, a fixed magnetic gear element that is magnetically coupled to the input-side magnetic gear element and fixed in rotation, and a fixed magnetism. An output-side magnetic gear element that is magnetically coupled to the gear element can be included. In the input side magnetic gear element, instead of the permanent magnet, a field winding shared or connected with the rotor winding of the induction machine 10 is arranged, and a current is passed through the field winding, so that the rotor 14 A field magnetic flux that is proportional to the torque generated is generated. In the fixed magnetic gear element, a plurality of magnetic teeth through which the field magnetic flux generated in the input side magnetic gear element passes are arranged at regular intervals (equally spaced) along the circumferential direction, and the output side magnetic gear element A plurality of magnetic poles or magnetic teeth on which the magnetic field flux that has passed through the magnetic teeth of the fixed magnetic gear element acts are arranged at regular intervals (equally spaced) along the circumferential direction. By making the number of poles (number of magnetic poles or magnetic teeth) of the output side magnetic gear element different from the number of poles of the input side magnetic gear element and the number of magnetic teeth of the fixed magnetic gear element, the power generated in the rotor 14 is changed. (Decelerated) and output from the output side magnetic gear element.

  As mentioned above, although the form for implementing this invention was demonstrated, this invention is not limited to such embodiment at all, and it can implement with a various form in the range which does not deviate from the summary of this invention. Of course.

  DESCRIPTION OF SYMBOLS 10 induction machine, 11 casing, 12 stator, 14 rotor, 20 input shaft, 21 stator core, 22 stator winding, 23 stator teeth, 30 control circuit, 31 rotor core, 32 rotor winding, 33 rotor teeth, 40 magnetic gear transmission mechanism , 41 Sun magnetic gear, 42 ring magnetic gear, 43 pinion magnetic gear, 44 output shaft, 51, 61, 63 core member, 52 field winding, 53 teeth, 62, 64 permanent magnet, 72 shared winding, 74 connection Terminal, 76 rectifier circuit, 83, 84, 85 rectifier arm, D11-D16 diode.

Claims (3)

An induction machine including a stator provided with a stator winding and a rotor provided with a rotor winding;
A magnetic gear transmission mechanism including an input-side magnetic gear element coupled to the rotor and an output-side magnetic gear element that rotates in conjunction with the input-side magnetic gear element, and that shifts and outputs the power of the rotor;
With
In the magnetic gear speed change mechanism, the condition that the output side magnetic gear element rotates around its central axis in conjunction with the rotation of the input side magnetic gear element and rotates around the central axis of the input side magnetic gear element, and the input side magnetism One or more of the conditions in which the number of poles of the gear element is different from the number of poles of the output-side magnetic gear element are satisfied,
A field winding is provided in the input side magnetic gear element, and a magnetic pole is formed in the input side magnetic gear element by causing a current to flow in the field winding.
A rotating electrical machine with a transmission mechanism in which a field winding and a rotor winding are shared or connected. A rotary electric machine with a speed change mechanism according to claim 1,
The field winding and the rotor winding are connected via a rectifier circuit,
The rectifier circuit is a rotating electrical machine with a speed change mechanism that rectifies the alternating current of the rotor winding into a direct current and flows it through the field winding. A rotary electric machine with a speed change mechanism according to claim 1 or 2,
Magnetic gear transmission mechanism
A ring magnetic gear element with fixed rotation;
As the input side magnetic gear element, a sun magnetic gear element disposed inside the ring magnetic gear element;
As an output side magnetic gear element, a planetary magnetic gear element rotatably supported on the output shaft and magnetically coupled to the ring magnetic gear element and the sun magnetic gear element;
A rotating electrical machine with a speed change mechanism.

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