JP2017077135A - Rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary electric machine that is excellent in cost and resource supply, and that can improve a torque density by increasing a torque generation surface.SOLUTION: A stator 100 has: an annular stator core 110 having stator teeth 130 arranged at a predetermined interval in a circumferential direction; and an armature coil 140 wound toroidally between the adjacent stator teeth 130 of the stator core 110. A rotor 200 has: a rotor core 210 that has first rotor teeth 231 opposed to the stator teeth 130 at one surface side in an axial direction, second rotor teeth 231 opposed to the stator teeth 130 at an inner surface side in a radial direction, and third rotor teeth 233 opposed to the stator teeth 130 at an outer surface side in the radial direction; an induction coil I that induces an induction current by interlinkage of a magnetic flux generated at the stator 100 side; and a field coil F that generates the magnetic field by energization of the induction current.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a rotating electrical machine provided with a plurality of rotor torque generating surfaces for a stator.

  In Patent Document 1, an annular stator having a stator core in which an armature winding is toroidally wound, a radial rotor facing radially inward with respect to the stator, and one axial direction of a rotating shaft with respect to the stator There is disclosed a rotating electrical machine that includes two axial rotors facing each other on the side and the other side, and has three rotor torque generating surfaces with respect to the stator.

  In each of the radial rotor and the two axial rotors of the rotating electrical machine disclosed in Patent Document 1, permanent magnets are arranged at predetermined intervals in the circumferential direction. This rotating electrical machine generates torque in the radial rotor and the two axial rotors by the interaction between the rotating magnetic field generated in the stator and the field magnetic fluxes of the permanent magnets of the radial rotor and the two axial rotors.

JP 2010-226808 A

  However, the rotating electrical machine disclosed in Patent Document 1 uses permanent magnets to form magnetic poles in the radial rotor and the two axial rotors. For this reason, when a rare earth magnet with a small recoverable reserve and uneven mine location is used as the permanent magnet provided on the radial rotor and the two axial rotors, the material cost increases or a stable resource There is a risk that supply cannot be secured.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a rotating electrical machine that is excellent in terms of cost and resource supply and that can improve torque density by increasing the torque generation surface. .

  One aspect of the invention of a rotating electrical machine that solves the above problems is a rotating electrical machine that includes a stator that generates magnetic flux by energizing a coil, and a rotor that rotates when the magnetic flux passes through the stator. An annular stator core having stator teeth arranged at a predetermined interval; and an armature coil wound toroidally between adjacent stator teeth of the annular stator core, wherein the rotor is in the axial direction of the stator core The rotor teeth that oppose the stator teeth on one surface side thereof, the rotor teeth that oppose the stator teeth on the radially inner surface side of the stator core, and the stator teeth on the radially outer surface side of the stator core A rotor core having a rotor tooth, wound around the rotor tooth, An induction coil to induce an induced current by a magnetic flux of the interlinking occurring in over the other side is wound on the rotor teeth, having a magnetic coil field for generating a magnetic field by energization of the induction current.

  According to one embodiment of the present invention, it is possible to provide a rotating electrical machine that is excellent in terms of cost and resource supply and that can improve torque density by increasing the torque generation surface.

FIG. 1 is a diagram showing a rotating electrical machine according to an embodiment of the present invention, and is a perspective view showing an overall configuration of the rotating electrical machine. FIG. 2 is a diagram illustrating the rotating electrical machine according to the embodiment of the present invention, and is a cross-sectional view of the rotating electrical machine cut along a plane passing through the rotating shaft. FIG. 3 is a view showing the rotating electrical machine according to the embodiment of the present invention, and is a perspective view showing the entire configuration of the rotating electrical machine partially shown in cross section. FIG. 4 is a view showing a rotating electrical machine according to an embodiment of the present invention, and is a perspective view of a stator. FIG. 5 is a view showing a rotating electrical machine according to an embodiment of the present invention, and is a perspective view of a stator core. FIG. 6 is a view showing a rotating electrical machine according to an embodiment of the present invention, and is a perspective view of an armature coil. FIG. 7 is a diagram illustrating a rotating electrical machine according to an embodiment of the present invention, and is a diagram illustrating a magnetic flux distribution of a stator. FIG. 8 is a view showing a rotating electrical machine according to an embodiment of the present invention, and is a perspective view of a rotor. FIG. 9 is a view showing a rotating electrical machine according to an embodiment of the present invention, and is a perspective view of a rotor core.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIGS. 1-9 is a figure explaining the rotary electric machine which concerns on one Embodiment of this invention.

(Schematic configuration of rotating electrical machine)
1, 2, and 3, the rotating electrical machine 1 includes a stator 100 that generates a magnetic flux by energizing a coil, and a rotor 200 that rotates by the passage of the magnetic flux.

  The rotating electrical machine 1 includes a shaft 20 on the rotating shaft 1C. The rotation shaft 1 </ b> C is the central axis of the rotating electrical machine 1, that is, the rotation center line of the rotor 200. The shaft 20 is fixed to the inner peripheral portion of the rotor 200 and rotates integrally with the rotor 200.

  The rotating electrical machine 1 includes a case (not shown) that covers the stator 100 and the rotor 200, and this case holds the stator 100 in a stationary state from the other side (upper side) in the axial direction of the rotating electrical machine 1. Here, in FIGS. 1, 2, 3, 4, 5, 8, and 9, the lower side is one side in the axial direction of the rotating electrical machine 1, and the upper side is the other side in the axial direction of the rotating electrical machine 1. It is.

  As will be described later in detail, the rotating electrical machine 1 generates an induced current in the induction coil I of the rotor 200 by a rotating magnetic field generated by energizing the armature coil 140 of the stator 100. And the rotary electric machine 1 makes the rotor 200 function as an electromagnet by energizing the field coil F of the rotor 200 with this induced current as a field current, and generates torque. Thus, the rotating electrical machine 1 is configured as a magnet-free self-excited wound field synchronous motor.

(Stator)
In FIGS. 1, 2, 3, 4, and 5, the stator 100 includes an annular stator core 110 and an armature coil 140 wound around the stator core 110. The stator core 110 is made of a high permeability magnetic material formed in an annular shape concentric with the rotating shaft 1C.

  The stator core 110 includes an annular stator yoke 120 and a plurality of stator teeth 130 provided on the stator yoke 120 at predetermined intervals in the circumferential direction. The stator yoke 120 has a circular or oval cross-sectional shape.

  The stator teeth 130 protrude from the surface of the stator yoke 120 and are formed in a trapezoidal shape when viewed from the axial direction of the rotating electrical machine 1 and a rectangular cross section in the circumferential direction of the rotating electrical machine 1. Twelve stator teeth 130 are provided at predetermined intervals in the circumferential direction on the stator yoke 120.

  Specifically, the stator tooth 130 includes a first stator tooth 131, a second stator tooth 132, and a third stator tooth 133.

  The first stator teeth 131 are provided on one side of the stator yoke 120 in the axial direction of the rotating electrical machine 1, and project from the stator yoke 120 to one side of the rotating electrical machine 1 in the axial direction.

  The second stator teeth 132 are provided on the inner peripheral surface side of the rotating electrical machine 1 in the stator yoke 120 and project from the stator yoke 120 to the inner peripheral surface side of the rotating electrical machine 1.

  The third stator teeth 133 are provided on the outer peripheral surface side of the rotating electrical machine 1 in the stator yoke 120 and project from the stator yoke 120 to the outer peripheral surface side of the rotating electrical machine 1.

  In the present embodiment, the stator core 110 is not divided and has an integral (one-piece) annular structure. For this reason, the mechanical strength of the stator core 110 can be improved as compared with the case where the stator core 110 is divided. Further, the stator core 110 can have sufficient resistance against excitation vibration due to the improved mechanical strength.

  Armature coil 140 is toroidally wound around annular stator yoke 120 with a slot between adjacent stator teeth 130 of stator core 110 as a slot. The toroidal winding is a method in which the winding 141 is wound around the stator yoke 120 alternately through the inside and the outside of the ring of the stator yoke 120.

  Thus, by adopting the structure in which the armature coil 140 is toroidally wound on the stator yoke 120, the stator core 110 can be integrated with the stator yoke 120, and the mechanical strength of the stator core 110 can be improved. Can do.

  The armature coil 140 is disposed between the stator teeth 130 and an intermediate position between the stator teeth 130 that are adjacent to the stator teeth 130 in the circumferential direction. The armature coil 140 corresponds to any of the U-phase, V-phase, and W-phase of three-phase alternating current.

  The pair of armature coils 140 facing in the circumferential direction across the stator teeth 130 is composed of magnetic flux generated from one armature coil 140 and magnetic flux generated from the other armature coil 140, and the direction of the magnetic flux is circumferential. The winding direction and energization direction are set so as to be opposite to each other.

  Thus, for example, when one armature coil 140 is in the U + phase and the other armature coil 140 is in the U− phase, the magnetic flux from one armature coil 140 and the other armature coil 140 toward the stator teeth 130 is increased. Occur.

  In FIG. 6, the winding 141 of the armature coil 140 is a rectangular wire having a rectangular cross section. The armature coil 140 is wound around the stator yoke 120 of the stator core 110 with the winding 141 in a toroidal winding state by edgewise winding. The edgewise winding is a method in which the winding 141 is wound vertically with the short side of the winding 141 facing the inner side and the outer side of the rotating electric machine 1 with respect to the stator yoke 120.

  As a result, the windings 141 adjacent in the winding pitch direction are in surface contact with the long sides, so that the number of turns can be increased while ensuring a cross-sectional area corresponding to the current. As a result, the space factor of the armature coil 140 can be improved, and the magnetomotive force of the stator 100 can be increased.

  Further, since the windings 141 adjacent to each other in the winding pitch direction are in surface contact with each other with long sides, heat conduction can be performed uniformly with a large area between the windings 141. Thereby, heat conduction is dispersed and heat dissipation can be improved.

  In addition, since both end portions 141A and 141B that become the winding start or winding end of the winding 141 can be arranged on the same surface on the other side in the axial direction of the stator 100, the connection of the plurality of armature coils 140 is facilitated. it can.

(Magnetic flux distribution of stator)
FIG. 7 is a diagram showing a magnetic flux distribution of the stator 100 obtained by electromagnetic field analysis. In FIG. 7, the stator core 110 and the rotor 200 are shown in a straight line for easy explanation. In FIG. 7, the first stator teeth 131, the second stator teeth 132, or the third stator teeth 133 are simply indicated as the stator teeth 130 without being distinguished from each other. FIG. 7 shows an analysis result when energization is performed with the V-phase current amplitude set to 1 as the reference value and the U-phase and W-phase current amplitude values set to −0.5, respectively.

  In FIG. 7, when one of a pair of armature coils 140 adjacent in the circumferential direction with the stator teeth 130 interposed therebetween is a V + phase and the other is a V− phase, the magnetic flux generated from the pair of armature coils 140 is a pair of armature coils 140. This occurs toward the stator teeth 130 sandwiched by the armature coils 140 and collides with the stator teeth 130. Then, the magnetic flux generated in the stator teeth 130 changes its direction in a direction perpendicular to the stator yoke 120 and travels from the stator teeth 130 to the rotor 200.

  A part of the magnetic flux directed toward the rotor 200 passes through a rotor core 210 (to be described later) of the rotor 200, and then travels toward the stator teeth 130 sandwiched between the pair of armature coils 140 of the W + phase and the W− phase. Further, the remaining part of the magnetic flux directed toward the rotor 200 passes through a rotor core 210 (to be described later) of the rotor 200, and then proceeds to the stator teeth 130 sandwiched between a pair of armature coils 140 of U + phase and U− phase.

  Thus, the magnetic circuit of the magnetic flux generated by the armature coil 140 is formed on the surface where the stator teeth 130 and the rotor 200 face each other. The rotating electrical machine 1 uses a surface on which the stator teeth 130 and the rotor 200 face each other as a torque generating surface.

  For this reason, the torque density can be increased by effectively using the magnetic flux generated by the armature coil 140 as the torque generation surface increases. Torque density means the magnitude of torque per volume.

  The rotor 200 is provided with three torque generating surfaces including one axial side of the rotating electrical machine 1 and a radially inner peripheral side and an outer peripheral side to increase the torque density. In this way, by increasing the torque generating surface, the rotating electrical machine 1 is small and can generate high torque, so that it can be particularly excellent as a rotating electrical machine mounted on a hybrid vehicle or the like.

(Rotor)
1, 2, 3, 8, and 9, the rotor 200 includes a rotor core 210, an induction coil I, and a field coil F.

The rotor core 210 includes a disk part 211 arranged on a plane orthogonal to the rotating shaft 1C, a cylindrical part 212 continuous to the inner edge part of the disk part 211, and a cylindrical part 213 continuous to the outer edge part of the disk part 211. Have.
The disk portion 211 is disposed so as to cover the stator core 110 from the other end side in the axial direction. The cylindrical portion 212 is disposed so as to cover the stator core 110 from the inner side in the circumferential direction.
The cylindrical portion 213 is disposed so as to cover the stator core 110 from the outer side in the circumferential direction. The rotor core 210 is made of a high permeability magnetic material.

  Thus, the rotor core 210 is formed in a cylindrical shape as a whole so as to cover the stator 100 on the other surface side in the axial direction and on both surface sides in the radial direction.

  In other words, the rotor core 210 is formed in a cylindrical shape having a U-shaped cross section with the disk portion 211 and the two cylindrical portions 212 and 213 as sides, and the stator core 110 is moved from one side in the axial direction to the other side. Covering towards.

  In addition, the rotor core 210 includes a first rotor tooth 231, a second rotor tooth 232, and a third rotor tooth 233 at the same circumferential position.

  The first rotor teeth 231, the second rotor teeth 232, and the third rotor teeth 233 have torque generation surfaces between the first stator teeth 131, the second stator teeth 132, and the third stator teeth 133 of the stator 100, respectively. Forming.

  The first rotor teeth 231 are provided on the other surface in the axial direction of the disk portion 211, and protrude from the disk portion 211 toward the other side in the axial direction toward the stator core 110. The first rotor teeth 231 face the first stator teeth 131 in the axial direction with a predetermined air gap.

  The second rotor teeth 232 are provided on the outer surface in the radial direction of the cylindrical portion 212, and project outward in the radial direction from the cylindrical portion 212 toward the stator core 110. The second rotor teeth 232 are opposed to the second stator teeth 132 in the radial direction with a predetermined air gap therebetween.

  The third rotor teeth 233 are provided on the radially inner surface of the cylindrical portion 213, and protrude inward in the radial direction from the cylindrical portion 213 toward the stator core 110. The third rotor teeth 233 are opposed to the third stator teeth 133 in the radial direction with a predetermined air gap therebetween.

  The radially inner end portion of the first rotor teeth 231 is continuous with the end portion on the one side in the axial direction of the second rotor teeth 232. Further, the radially outer end of the first rotor teeth 231 is continuous with the end of the third rotor teeth 233 on one side in the axial direction.

  Thus, the rotor core 210 has an integrated structure in which the first rotor teeth 231, the second rotor teeth 232, and the third rotor teeth 233 are continuous. That is, the first rotor teeth 231, the second rotor teeth 232, and the third rotor teeth 233 are integrated to form one rotor tooth 230. The rotor core 210 includes a plurality of rotor teeth 230 at equal intervals in the circumferential direction.

  The rotating electrical machine 1 includes holding rings 4A and 4B. The retaining rings 4A and 4B are fitted or screwed into the shaft 20, so that the retaining rings 4A and 4B sandwich the rotor core 210 in the axial direction, and the rotor core 210 is fixed to the shaft 20.

  Key grooves (not shown) are formed in the inner peripheral portion of the cylindrical portion 212 of the rotor core 210 and the outer peripheral portion of the shaft 20. The rotor core 210 is prevented from rotating with respect to the shaft 20 when the key is inserted into the key groove, and can rotate integrally.

(Induction coil, field coil)
The winding Iw of the induction coil I and the winding Fw of the field coil F are made of a flat wire in which a copper wire having a rectangular cross section is covered with an insulating material. The induction coil I and the field coil F are constituted by winding the windings Iw and Fw by α. Here, the α winding is a method in which the winding start and the winding end of the windings Iw and Fw are simultaneously wound outward.

  The induction coil I and the field coil F wound in this way have an improved space factor because the winding start side ends of the windings Iw and Fw are not left inside, and both ends of the windings Iw and Fw are improved. Since the part is arranged outside the induction coil I and the field coil F, the connection can be easily performed.

  In the present embodiment, the winding Iw of the induction coil I is wound in two rows in the winding pitch direction, and the end of the first row and the end of the second row of the winding Iw are on the same surface in the rotor 200. Pulled out to the side.

  Further, the winding Fw of the field coil F is wound in two rows in the winding pitch direction, and the end of the first row and the end of the second row of the winding Fw are on the same surface side in the rotor 200. Has been pulled out.

  The induction coil I and the field coil F wound α in this way are arranged by drawing the ends of the windings Iw and Fw to the inner surface or outer surface of the rotor 200 on the same surface (the other surface in the axial direction) side. Therefore, using a connection component such as a connection board (not shown) arranged on the other surface side of the rotor 200 in the axial direction, the connection can be easily performed on the same surface, and the axial length of the rotating electrical machine 1 can be increased. This can be suppressed.

  In addition, when the rotor core 210 is formed in a cylindrical shape as a whole so as to cover the stator 100 on one axial side and both radial sides, the α-wound induction coil I and field coil F are: The ends of the windings Iw and Fw may be drawn out and arranged on the same surface (one surface in the axial direction) side of the inner periphery or outer periphery of the rotor 200. In this case, using a connection component such as a connection board (not shown) arranged on one surface side of the rotor 200 in the axial direction, the connection can be easily performed on the same surface, and the axial length of the rotating electrical machine 1 can be increased. This can be suppressed.

  In addition, since the induction coil I and the field coil F are wound α, the heat conductivity of the winding Iw and the winding Fw can be made uniform, so that the heat dissipation of the rotor 200 can be improved.

  Since the induction coil I and the field coil F are wound by α, the space factor can be improved and the copper loss can be reduced.

  Further, the induction coil I and the field coil F are wound so that the short sides of Iw and Fw made of a rectangular wire are perpendicular to the magnetic flux generation direction.

  Thereby, the eddy current loss which generate | occur | produces with the induction coil I and the field coil F can be reduced.

  The induction coil I and the field coil F are formed in a shape obtained by bending α-wound windings Iw and Fw into a U-shape.

  Specifically, the field coil F is bent in a U shape along the inner surface of the U-shaped rotor core 210 and around the base end portion of the rotor teeth 230.

  On the other hand, the induction coil I is bent in a U shape along the inner surface of the U-shaped field coil F and around the tip of the rotor teeth 230.

  As described above, the induction coil I and the field coil F are arranged such that the induction coil I and the field coil F are arranged on the front end side and the base end side of the same rotor tooth 230, respectively. The induction coil I is arranged closer to the stator 100 side of the rotor teeth 230 than the field coil F. For this reason, the induction coil I and the field coil F can be brought into close contact with each other, and the space factor of the induction coil I and the field coil F can be improved.

  Further, since the U-shaped rotor core 210 is opened to the other side in the axial direction of the rotating electrical machine 1, the stator core 110 is inserted into the rotor core 210 from the other side in the axial direction without dividing the stator core 110. Thus, the rotating electrical machine 1 can be assembled. Thereby, assembly | attachment property can be improved. Further, since the rotor core 210 is opened to the other side in the axial direction of the rotating electrical machine 1, heat can be efficiently radiated from the opened side, and the cooling performance can be improved.

  The induction coil I configured as described above induces an induced current by linkage of magnetic flux generated on the stator 100 side when a rotating magnetic field is generated in the armature coil 140.

(Rectifier circuit)
Here, a diode (not shown) is provided as a rectifier in the rotor 200, and the diode, the induction coil I, and the field coil F are connected so as to constitute a rectifier circuit. In this rectifier circuit, the alternating induction current generated in the induction coil I is rectified by the diode, and the rectified direct current is supplied to the field coil F as a field current. The field coil F generates a magnetic field when energized as a field current.

(Field energy)
The rotating electrical machine 1 includes twelve stator teeth 130 and eight rotor teeth 230. For this reason, the component ratio S / P between the number of slots S (12) of the stator 100 and the number of magnetic poles P (8) of the rotor 200 is 3/2.

  Further, in the rotating electrical machine 1 of the present embodiment, since the armature coil 140 formed in toroidal winding is concentratedly wound, the magnetic flux of the fundamental frequency is spatially a secondary space in a stationary coordinate system as a leakage flux. Harmonics are superimposed about 50%.

  Therefore, by setting the composition ratio S / P to 3/2, the third-order harmonics are interlinked with the rotor 200 in terms of time in the rotating coordinate system. The third time harmonic generated in the rotating coordinate system has an asynchronous frequency with respect to the rotational speed of the rotor 200.

  For this reason, the induction coil I is wound around the rotor teeth 230 that are salient poles of the rotor 200 to generate an induced current by interlinking the third time harmonics in the induction coil I, and the induced current is rectified. By using the current as the field current, a field can be generated in the field coil F, and the rotor 200 can function as an electromagnet.

  Here, the high-order time harmonic magnetic flux such as the fourth order or the fifth order in the rotating coordinate system is only a waveform that vibrates only in the vicinity of the surface of the rotor core 210, so that an induction current is efficiently generated in the induction coil I. I can't. On the other hand, low-order spatial harmonics such as third-order time harmonics can be linked to the inside of the rotor core 210 because of the relatively low frequency magnetic flux.

  In the present embodiment, of the spatial harmonic components superimposed on the magnetic flux of the fundamental frequency, the third time harmonic is targeted for recovery, and this third time harmonic is the fundamental frequency input to the armature coil 140 or The frequency is higher than the second-order time harmonic and pulsates in a short period.

  For this reason, the loss energy of the spatial harmonic component can be efficiently recovered, the time change of the magnetic flux linked to the induction coil I can be increased, the induced current can be increased, and a large rotational torque can be obtained. .

  The effect of the rotary electric machine 1 of this embodiment demonstrated as mentioned above is demonstrated. In the rotating electrical machine 1 of the present embodiment, the stator 100 includes a toroidal winding between an annular stator core 110 having stator teeth 130 arranged at a predetermined interval in the circumferential direction and an adjacent stator tooth 130 of the annular stator core 110. Armature coil 140.

  The rotor 200 has a first rotor tooth 231 that faces the first stator teeth 131 on one surface side in the axial direction of the stator core 110 and a second rotor tooth 132 that faces the inner surface side in the radial direction of the stator core 110. The rotor core 210 has two rotor teeth 232 and a third rotor teeth 233 facing the third stator teeth 133 on the outer surface side in the radial direction of the stator core 110.

  Further, the rotor 200 is wound around the rotor teeth 230, and is wound around the induction coil I that induces an induced current by the linkage of magnetic flux generated on the stator 100 side, and the rotor teeth 230, and is energized by the energization of the induced current. A field coil F for generating a magnetic field.

  According to the present embodiment, an induction current can be generated in the induction coil I by linkage of magnetic flux generated on the stator 100 side, and a field current is applied to the field coil F using a DC current obtained by rectifying the induction current as a field current. Therefore, the rotor 200 can function as an electromagnet, and the rotational torque of the rotor 200 can be obtained.

  For this reason, since the rotational torque of the rotor 200 can be obtained without using a permanent magnet, the use of a rare earth magnet as the permanent magnet can prevent the material cost from increasing or the resource supply from becoming unstable. Thereby, the rotary electric machine 1 excellent in terms of cost and resource supply can be provided.

  Further, according to the present embodiment, the magnetic flux generated on the stator 100 side is linked to the rotor teeth 230 on the three surfaces of the first rotor teeth 231, the second rotor teeth 232, and the third rotor teeth 233, so that torque is generated. The surface can be increased and the torque density can be improved.

  As a result, it is excellent in terms of cost and resource supply, and the torque density can be improved by increasing the torque generation surface.

  Furthermore, according to the present embodiment, among the spatial harmonic components superimposed on the magnetic flux of the fundamental frequency, the third-order harmonics are targeted for recovery, so that the harmonics generated in the stator 100 are effective for the rotor teeth 230. Thus, more field energy can be obtained.

  In addition, according to the present embodiment, since the U-shaped rotor core 210 is opened to the other side in the axial direction of the rotating electrical machine 1, the stator core 110 can be turned into the rotor core 210 without dividing the stator core 110. On the other hand, the rotating electrical machine 1 can be assembled by inserting from the other side in the axial direction. Thereby, assembly | attachment property can be improved. Further, since the rotor core 210 is opened to the other side in the axial direction of the rotating electrical machine 1, heat can be efficiently radiated from the opened side, and the cooling performance can be improved.

  Further, according to the present embodiment, the end portions of the windings Iw and Fw of the induction coil I and the field coil F can be arranged on the same surface on the other end side in the axial direction of the rotor 200, and the same surface on the other end side. Since connection parts, such as a connection board | substrate, can be arrange | positioned in this and it can connect, the length of the axial direction of the rotary electric machine 1 can be restrained.

  In the rotating electrical machine 1 of the present embodiment, the induction coil I and the field coil F are wound around the same rotor tooth 230, and the induction coil I is a field coil F in the rotor tooth 230. Rather than the stator 100 side.

  According to the present embodiment, since the induction coil I is disposed closer to the stator 100 than the field coil F, more harmonics are linked to the induction coil I and a large current is generated in the induction coil I. be able to. In addition, the induction coil I and the field coil F are wound around the same rotor teeth 230, so that the induction coil I and the field coil F can be brought into close contact with each other. The space factor can be improved.

  In the rotating electrical machine 1 according to the present embodiment, the rotor core 210 includes a first rotor tooth 231 that faces the first stator teeth 131 on one axial surface side of the stator core 110 and a radially inner surface side of the stator core 110. The second rotor teeth 232 facing the second stator teeth 132 and the third rotor teeth 233 facing the third stator teeth 133 on the outer surface side in the radial direction of the stator core 110 are an integrated structure.

  In the rotating electrical machine 1 of the present embodiment, the rotor core 210 has a cylindrical shape that covers the stator 100 on one axial surface side, the radial inner surface side, and the radial outer surface side of the stator 100.

  The windings of the armature coil 140, the induction coil I, and the field coil F are not limited to copper wires, and for example, aluminum conductors or high-frequency current twisted litz wires may be employed.

  Further, the rotating electrical machine 1 may be configured in a hybrid field type (hybrid type) in which a permanent magnet is disposed in the rotor 200 in addition to the field coil F. In this case, the permanent magnet and the field functioning as an electromagnet. Torque can be generated by effectively cooperating with the coil F. For this reason, the usage-amount of the rare earth magnet which raises a cost can be suppressed, and an equivalent output can be obtained, without enlarging.

  Further, the rectifying element is not limited to the diode, and other semiconductor elements such as switching elements may be employed. The rectifying element is not limited to the type housed in the diode case, and may be mounted inside the rotor 200.

  Moreover, the rotary electric machine 1 is not limited to vehicle-mounted use, For example, it can employ | adopt suitably as a generator for wind power generation, or an electric motor for machine tools.

  While embodiments of the invention have been disclosed, it will be apparent to those skilled in the art that changes may be made without departing from the scope of the invention. All such modifications and equivalents are intended to be included in the following claims.

DESCRIPTION OF SYMBOLS 1 Rotating electrical machine 100 Stator 110 Stator core 130 Stator teeth 140 Armature coil (coil)
200 rotor 210 rotor core 230 rotor teeth 231 first rotor teeth (rotor teeth facing the stator teeth on one surface side in the axial direction of the stator core)
232 second rotor teeth (rotor teeth facing the stator teeth on the radially inner surface side of the stator core)
233 Third rotor teeth (rotor teeth facing the stator teeth on the outer surface side in the radial direction of the stator core)
F Field coil I Induction coil

Claims (4)

A rotating electrical machine comprising a stator that generates magnetic flux by energizing a coil and a rotor that rotates by passage of the magnetic flux,
The stator is
An annular stator core having stator teeth disposed at predetermined intervals in the circumferential direction;
An armature coil that is toroidally wound between adjacent stator teeth of the annular stator core;
The rotor is
A rotor tooth facing the stator teeth on one axial side of the stator core;
A rotor tooth facing the stator teeth on the radially inner surface side of the stator core;
A rotor core having a rotor tooth facing the stator teeth on the outer surface side in the radial direction of the stator core;
An induction coil wound around the rotor teeth and inducing an induced current by linkage of magnetic flux generated on the stator side;
A rotating electric machine comprising: a field coil wound around the rotor teeth and generating a magnetic field by energization of the induced current. The induction coil and the field coil are wound in layers on the same rotor teeth,
The rotating electrical machine according to claim 1, wherein the induction coil is disposed closer to the stator than the field coil. The rotor core is
The rotor teeth facing the stator teeth on both sides in the axial direction of the stator core and the rotor teeth facing the stator teeth on the outer surface in the radial direction of the stator core have a continuous integrated structure. The rotating electrical machine according to claim 1 or 2.   4. The rotating electrical machine according to claim 3, wherein the rotor core has a cylindrical shape that covers the stator on one surface side in the axial direction of the stator, and on a radially inner surface side and a radially outer surface side. .