JP6638202B2 - Axial gap type rotating electric machine - Google Patents

Description

  The present invention relates to an axial gap type rotating electric machine using a winding field.

  The rotating electric machine faces the rotor and the stator via a gap, and, for example, links a magnetic flux generated by an armature coil disposed on the stator side to the rotor side to form a magnetic circuit, thereby forming a rotational force (reluctance). For the purpose of assisting the rotational force, permanent magnets and field windings (electromagnets) are used to utilize the magnet torque.

  In such a rotating electric machine, it has been proposed to use an axial type in which a stator and a rotor face each other in an axial direction (Patent Document 1). Further, a band-shaped wire is wound around a core material on the stator side. (Patent Document 2).

  However, when the spatial harmonic magnetic flux links the permanent magnet, the permanent magnet generates heat due to eddy current generated inside, and the coercive force is reduced, whereby the magnetic force is irreversibly reduced. Thereby, for example, as described in Patent Document 1, in the case of a rotating electric machine of a type in which a permanent magnet is embedded on the rotor side where spatial harmonic magnetic fluxes interlink, the magnetic force of the permanent magnet is reduced, resulting in good driving. Cannot be realized.

  In order to solve this problem, it is conceivable to use an expensive magnet to which a heavy rare earth element such as dysprosium (Dy) or terbium (Tb) having a high coercive force is added, but the cost is increased.

  Further, as described in Patent Document 2, in order to wind a strip-shaped wire around a core material, it is necessary to draw out connection ends of the winding from inside and outside of a winding coil, and secure a space for drawing out. For example, if the core material is shaved in order to reduce the magnetic flux passage area, the driving efficiency of the rotating electric machine is reduced. Further, when the strip-shaped wire is pulled out from the edge on the end face side of the core material, a gap is formed between members located above and below the core material, which hinders miniaturization.

JP 2010-246171 A JP 2012-50312 A

  Therefore, the present invention provides an axial gap type rotary electric machine having a winding field structure, which can obtain a magnet torque by using a spatial harmonic magnetic flux generated in an armature coil without using a permanent magnet. It is intended to be.

One embodiment of the invention of a rotating electric machine that solves the above-described problems includes a rotor that is driven to rotate around a rotating shaft, a stator that faces the rotor in an axial direction of the rotating shaft, and a rotating shaft of the stator. A plurality of armature coils arranged around an axis, a plurality of induction coils and a plurality of field coils arranged around the axis of the rotation axis of the rotor, and rectifying an induction current generated in the induction coil. A rectifying element for supplying to the field coil, wherein at least one of the armature coil, the induction coil and the field coil is formed of a strip-shaped rectangular wire, line, said has wide sides of the flat wire in the axial direction of the rotary shaft is wound with laps in two stages in the core material to be in contact with the radially outer peripheral surface of the core material, the said core material 2 Wrap around It said flat wire is a single coil first stage which is circulating in the core material and the second stage consists of the same coil, two ends of each of the single coil has, the core It is drawn radially from the material.

  According to one embodiment of the present invention, an axial gap type rotating electric machine having a winding field structure capable of obtaining a magnet torque using a spatial harmonic magnetic flux generated in an armature coil without using a permanent magnet. Can be provided.

FIG. 1 is a view showing an axial gap type rotating electric machine according to an embodiment of the present invention, and is a longitudinal sectional perspective view showing a schematic entire configuration and cut around an axis. FIG. 2 is a perspective view showing a stator and a rotor having a main configuration. FIG. 3 is a perspective view showing the structure of the stator. FIG. 4 is a perspective view showing a stator core and an armature coil. FIG. 5 is an exploded perspective view showing the structure of the stator. FIG. 6 is an exploded perspective view illustrating the connection of the armature coils of the stator core. FIG. 7 is a partially enlarged exploded perspective view for explaining the connection and connection state of the armature coils of the stator core. FIG. 8 is a perspective view showing an assembled state of the stator. FIG. 9 is an exploded perspective view showing the resin mold in the stator. FIG. 10 is a partially exploded perspective view showing a rotor core, an induction coil, and a field coil. FIG. 11 is a circuit configuration diagram of a closed circuit that connects an induction coil and a field coil via a diode. FIG. 12 is a perspective view showing a mounting form of the closed circuit shown in FIG. 11 in an actual machine. FIG. 13 is a perspective view showing a structure of a connection base for connecting an induction coil and a field coil to a diode. FIG. 14 is an exploded perspective view showing the structure of the rotor. FIG. 15 is an exploded perspective view showing a resin mold in the rotor. FIG. 17 is a front view showing the structure of the shaft. FIG. 17 is a perspective view illustrating attachment of the rotor core and the yoke to the shaft. FIG. 18 is a partially enlarged perspective view illustrating a state where a stator and a rotor are attached to a shaft. FIG. 19 is a model diagram illustrating winding of an armature coil, an induction coil, and a field coil around a core material. FIG. 20 is a magnetic field diagram illustrating magnetic fluxes generated and linked in the armature coil, the induction coil, and the field coil. FIG. 21 is a magnetic flux characteristic diagram showing a magnetic flux density and a magnetic flux vector of a third spatial harmonic magnetic flux in the rotating coordinate system. FIG. 22 is a magnetic field diagram illustrating magnetic fluxes generated and interlinked in the armature coil, the induction coil, and the field coil in the case of the radial gap type having no auxiliary pole. FIG. 23 is a magnetic field diagram illustrating magnetic fluxes generated and interlinked in the armature coil, the induction coil, and the field coil in the case of the radial gap type having the auxiliary pole. FIG. 24 is a graph showing the magnetic flux density that changes in accordance with the rotation angle when the armature coils are concentratedly wound or distributedly wound and linked via a gap. FIG. 25 is a graph showing the magnetic flux density for each order of the spatial harmonic magnetic flux superimposed on the magnetic flux shown in FIG. FIG. 26 is a graph showing torque waveforms obtained respectively for comparison between the IPMSM, the radial gap type without auxiliary poles, and the radial gap type with auxiliary poles. FIG. 27 is a perspective view showing the appearance of a rotor and a shaft of a rotating body rotatably supported by a stator.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 to 27 are diagrams illustrating an axial gap type rotating electric machine according to an embodiment of the present invention.

  1 and 2, the rotating electric machine 100 includes a stator 110 and two rotors 120 and 130, each of which is formed to have a substantially disk-shaped outer shape. 130 has a structure that does not require a contact-type energy input using a slip ring or the like, and has performance suitable for mounting on a hybrid vehicle or an electric vehicle, for example.

  In the rotating electric machine 100, two rotors 120 and 130 are respectively attached to a shaft (rotating shaft) 101 that penetrates an axis so that the rotating electric machine 100 is sandwiched between both surfaces of a stator 110 with a gap G therebetween. , The stator 110 rotatably supports the shaft 101, and the rotors 120 and 130 are fixed to the shaft 101. That is, the rotating electric machine 100 is constructed as an axial gap double rotor type motor that faces the stator 110 sandwiched between the two rotors 120 and 130 in the axial direction of the shaft 101.

  As shown in FIG. 3, the stator 110 includes a plurality of stator cores 15 (core materials) each having a short rod shape and a substantially trapezoidal cross section, and the stator core 15 has a three-phase AC power supply (for example, an unillustrated vehicle-mounted vehicle). An armature coil 11 to which an external power supply such as a battery is connected is wound around the armature coil 11 and disposed so as to be positioned around the axis of the shaft 101.

  The stator core 15 is made of a magnetic material having a high magnetic permeability, and is extended in a direction parallel to the shaft 101 so that the armature coils 11 (11u, 11v, 11w) of each of the three phases are arranged in a parallel state without gaps by six poles each. It is concentrated winding so that it becomes.

  That is, the armature coil 11 is formed as a winding coil having a center line parallel to the extending direction of the shaft 101 using the 18 status slots 17 between the stator cores 15, so that 18 poles ( The number of magnetic poles 18) is evenly arranged. In short, the armature coils 11 have windings wound around a direction parallel to the axial direction of the rotation axis, and are equally arranged around the rotation axis.

  As shown in FIG. 2, both ends of the stator core 15 are held by two disk-shaped holding frames (holding plates, frame members) 16 sandwiched between the rotors 120 and 130. The holding frame 16 holds the end 15a of the stator core 15 (see FIGS. 3 and 4) in a holding hole 16a that is opened to expose the end face 15b (so-called offset state). ing. The holding frame 16 is made of a non-magnetic material, for example, a PPS resin described later so as not to hinder the formation of the magnetic circuit, and rotates the shaft 101 passing therethrough by a bearing 108 attached to the center. It is freely supported.

Specifically, in the stator core 15, as shown in FIG. 4, the armature coil 11 is formed by winding a strip-shaped rectangular wire 11L into a so-called α winding.
Here, the α-winding of the flat wire 11L is, for example, in a state in which the vicinity of the center in the length direction of the flat wire 11L is brought into close contact with the narrow end portion (location near the axis side) 15c in the trapezoidal cross section of the stator core 15. In this manner, one side of the rectangular wire 11L near the center in the longitudinal direction is connected to an end surface 15b (for example, the upper surface in FIG. 4) of the stator core 15 at one end 15a. 4 is wound around the same location along the plane direction, and the other side of the flat wire 11L with respect to the vicinity of the center in the length direction is connected to the end face 15b of the other end 15a of the stator core 15 (for example, the lower face side in FIG. 4). ) Is a winding method in which the same portion is wound around and wound along the plane direction of (2). That is, the armature coil 11 is wound with the flat wire 11L wound in two stages in the axial direction of the rotating shaft, and the two-stage end of the flat wire 11L is drawn out to the same side (outer peripheral side of the stator 110). Have been.

  As a result, the stator 110 forms the armature coil 11 by winding the flat wire 11L as a winding around the stator core 15 to form the armature coil 11, thereby reducing the cross-sectional area of the winding orthogonal to the magnetic flux linked to the rotor core 25 described later. The eddy current loss generated in the winding can be reduced.

  Further, since the end face 15b of the stator core 15 and the orbiting end face (the end face in the axial direction) of the armature coil 11 are in an offset state, the stator 110 is linked directly to the armature coil 11 from near the end face 15b of the stator core 15. Higher harmonic flux can be reduced. For this reason, eddy current loss (harmonic copper loss) generated in the winding coil can be reduced to limit the generation of heat distribution, and the uniformity of the resistance value due to the occurrence of the temperature distribution in the winding decreases. A vicious cycle such as occurrence of copper loss can be suppressed.

  Further, in the stator 110, the one end 11La and the other end 11Lb with respect to the vicinity of the center in the length direction of the rectangular wire 11L wound around the stator core 15 by α can be drawn out in the circumferential plane. Therefore, the winding amount of the flat wire 11L of the armature coil 11 can be increased as much as possible. Also, in the rotating electric machine 100 according to the present embodiment, the ends 11La and 11Lb of the flat wire 11L are pulled out from the end face 15b side of the stator core 15 and the holding frame 16 is installed. Can be avoided, and furthermore, even when the holding frame 16 is vibrated or the like, the holding frame 16 and members such as the flat wire 11L and the stator core 15 are prevented from contacting each other and being damaged. be able to. In the present embodiment, the ends 11La and 11Lb of the rectangular wire 11L are drawn from the opposite side of the tip 15c, that is, from the outer periphery of the stator 110, but may be drawn from the tip 15c.

  Further, the stator core 15 has a notch 15k (recess) formed at the trapezoidal wide end of both end portions 15a, and is formed on the wide outer peripheral edge of the holding hole 16a of the holding frame 16 so as to correspond to the notch 15k. Is formed with a protrusion 16t (convex portion, see FIG. 5). Then, the projection 16t of the holding hole 16a is fitted into the notch 15k of the stator core 15, and is positioned and held in the axial direction. Here, the holding frame 16 is formed in a short, bottomed cylindrical shape that forms a space for accommodating therein both ends 15a of the stator core 15 in a state of being fitted into the holding holes 16a. The stator core 15 is positioned and held by abutting the portions 16d and screwing them using the screw holes 16h.

  Thus, the stator 110 can prevent the holding frame 16 from strongly hitting the flat wire 11L due to vibration or the like, and can prevent the holding frame 16 from being damaged.

  Further, as shown in FIG. 5, the stator 110 has the armature coils 11 of the stator core 15 connected in parallel for each of the three phases U, V, and W, and the DC current of the vehicle-mounted battery is converted by the inverter. Three-phase alternating current is supplied from the input line 19 for each phase. For example, as shown in FIG. 6, the end 11La of the rectangular wire 11L on one side for each of the three-phase armature coils 11u, 11v, and 11w is prepared for each of the three-phase U, V, and W phases. The bus bars 12u, 12v, and 12w in the shape of a ring that are formed into a ring shape as a whole are easily fastened by the caulking clip 13 with good workability and are electrically connected in parallel. Similarly, a bus bar 12a, which is a neutral point of three phases, is fastened to the end portion 11Lb of the rectangular wire 11L on the other side by a caulking clip 13 and electrically connected in parallel. In the present embodiment, the bus bars 12u, 12v, 12w, and 12a are arranged on the outer peripheral side of the stator 110. However, the present invention is not limited to this.

  Here, the connection end portions 11La and 11Lb of the armature coil 11 are drawn out of the encircling surface of the rectangular wire 11L wound around the stator core 15 and located on the outer peripheral side of the stator 110 as shown in FIGS. I am trying to be. For this reason, the plate-shaped busbars 12 (12u, 12v, 12w, 12a) are arranged so that the plane in the plate shape is parallel to the direction intersecting the axis, and the upper and lower levels are arranged on the outer peripheral side. Thus, the stator 110 can be constructed without being thickened in the axial direction and the planar direction.

  The stator 110 holds the stator core 15 in which the armature coil 11 (rectangular wire 11L) is wound and is electrically connected to the stator core 15 by the bus bars 12u, 12v, 12w, and 12a in the holding frame 16, and then the holding is performed. In the frame 16, for example, PPS (Polyphenylenesulfide) resin having excellent heat radiation characteristics is injected and filled (injected) and fixed. Specifically, as shown in FIG. 8, the stator 110 accommodates the stator core 15 and the like inside the holding frame 16 and screws the thick portion 16d, and then opens the thick portion 16d to open the armature. A PPS resin (resin material) is injected and solidified from an outlet 16 e from which the input wires 19 for the three phases of the coil 11 are drawn out.

  Thus, the stator 110 can inject the PPS resin into the gap between members such as the status lot 17 in the storage space in the holding frame 16 as shown in FIG. 9, and prepare the injection filling mold. Instead, a resin mold MoS in which the PPS resin is penetrated into the gap between the stator core 15, the armature coil 11, the bus bar 12, and the caulking clip 13 and fixed can be obtained. For this reason, since each member is held by the resin mold MoS, movement due to centrifugal force or vibration is restricted, and electromagnetic vibration or the like can be suppressed by stabilizing characteristics. Further, robustness against centrifugal force, vibration and impact can be ensured. In addition, by using the resin mold MoS, it is possible to limit the intrusion of moisture and the like and to improve the durability.

  Thereby, stator core 15 is arranged on stator 110 such that end surface 15b of end portion 15a thereof faces end surface 25b of end portion 25a of rotor core (core material) 25 of rotors 120 and 130 described later via gap G. Have been. The stator 110 generates a magnetic flux by supplying AC power to the armature coil 11, and the magnetic flux can be linked from the end face 15 b of the stator core 15 to the end face 25 b of the rotor core 25 of the rotors 120 and 130.

  For this reason, in the rotating electric machine 100, a magnetic flux linked to the rotor core 25 located on both sides of the stator core 15 can be diverted by the yoke 26 described later to form a closed magnetic circuit, and the magnetic flux forming the magnetic circuit can be formed. The two rotors 120 and 130 sandwiching the stator 110 can be driven to rotate by the reluctance torque (main rotational force) for minimizing the magnetic path.

  For this reason, it is necessary for the rotating electric machine 100 to integrally rotate the rotors 120 and 130 fixed to the common shaft 101 with the same rotational force, and the rotors 120 and 130 are symmetric on both sides of the stator 110. Built in structure.

  As a result, the rotating electric machine 100 can output electric energy to be energized and input as mechanical energy from the shaft 101 that rotates integrally with the rotors 120 and 130 that are driven to rotate on both sides of the stator 110 while having the same axis. it can.

  At this time, in the rotary electric machine 100, the spatial harmonic component is superimposed on the magnetic flux linked from the stator core 15 to the rotor core 25. For this reason, the rotors 120 and 130 can also generate an induced current in the built-in coil using the change in the magnetic flux density of the spatial harmonic component of the magnetic flux interlinked from the stator 110 to obtain an electromagnetic force. .

  More specifically, the magnetic flux generated by the armature coil 11 of the stator 110 has a spatial harmonic component superimposed on a main magnetic flux that fluctuates at the fundamental frequency of the supplied AC power, and is linked to the rotors 120 and 130 (rotor core 25). It is supposed to.

  For this reason, the rotors 120 and 130 are linked to the rotor core 25 by the spatial harmonic magnetic flux that changes with time at a cycle different from the fundamental frequency of the main magnetic flux. Induction current can be efficiently generated without connecting to an external power supply or the like such as a vehicle-mounted battery and inputting power. As a result, the spatial harmonic magnetic flux that causes iron loss can be recovered as energy for self-excitation.

  As shown in FIG. 10, rotating electric machine 100 has rotor cores 25 uniformly arranged around cylindrical portion 23 for fixing to shaft 101, and a space formed between adjacent side surfaces of rotor core 25 is a rotor slot. The induction coil 21 and the field coil 22 are disposed as a coil 27. The induction coil 21 and the field coil 22 are formed as two-stage windings in the length direction (axial direction) of the rotor core 25, and each of the flat wires 21L and 22L having a width smaller than the flat wire 11L of the armature coil 11 is α. It is wound up and wound. In other words, the flat coils 21L and 22L are wound around the induction coil 21 and the field coil 22 in two steps in the axial direction of the rotation axis, and the ends of the two steps of the flat wires 21L and 22L are the same. Side (outer peripheral side of the rotors 120 and 130).

  Thereby, in the rotors 120 and 130, the cross-sectional area of the winding orthogonal to the magnetic flux linked from the stator core 15 can be reduced, and the eddy current loss generated in the winding can be reduced. In addition, since the wide surfaces of the rectangular wires 21L and 22L wound by α are in contact with the rotor core 25, heat generated by energization can be efficiently transferred to allow continuous operation. Further, since the end face 25b of the rotor core 25 and the orbiting end face of the induction coil 21 are in an offset state, the induced current generated in the induction coil 21 becomes unstable and the pulsation of the field current becomes large, thereby causing torque ripple or the like. The occurrence of characteristic deterioration can be suppressed.

  Further, in the rotors 120 and 130, the winding amounts of the induction coil 21 and the field coil 22 can be increased by α-winding the flat wires 21L and 22L. Further, when pulling out first and second connection ends 21p, 21q, 22p, 22q, which will be described later, from the windings from the induction coil 21 and the field coil 22, a stack of members around the rotor core 25 and a holding plate 41 which will be described later. Can be prevented from being obstructed by the attachment. Accordingly, it is possible to effectively prevent the holding plate 41 and members such as the rectangular wires 21L and 22L and the rotor core 25 from being damaged by receiving a load due to contact with each other.

  Specifically, the rotors 120 and 130 include a plurality of rotor cores 25 each having a short rod shape and a substantially trapezoidal cross section on one surface side of the yoke 26, and the induction coil 21 and the field coil 22 are wound around the rotor core 25. And is disposed so as to be located around the axis of the shaft 101.

  The rotor core 25 is made of a magnetic material having a high magnetic permeability, is extended in a direction parallel to the shaft 101, and has a gap between the induction coil 21 and the field coil 22 such that the induction coil 21 and the field coil 22 are formed as a common core material in two stages. Are concentrated and wound in parallel.

  That is, the induction coil 21 and the field coil 22 are formed into a winding coil having a center line parallel to the shaft 101 using the twelve rotor slots 27 between the rotor cores 25, thereby forming 12 poles around the shaft 101. The number of slots 12) is evenly arranged. In short, the winding of the induction coil 21 and the field coil 22 is wound around a direction parallel to the axial direction of the rotation axis, and the windings are equally arranged around the rotation axis.

  Therefore, the rotating electric machine 100 has a composition ratio S / 12 between the number of slots S (12) of the induction coil 21 and the field coil 22 on the rotors 120 and 130 and the number of magnetic poles P (18) of the armature coil 11 on the stator 110. It is formed so that P becomes 2/3.

  Further, the rotor core 25 is formed integrally with one surface side of the disk-shaped yoke 26 so that the side separated from the end portion 25a is opposed to the end surface 15b of the stator core 15 via the gap G with the gap G therebetween. The yoke 26 is attached to the center so that the cylindrical portion 23 through which the shaft 101 passes is fixed.

  With this structure, the magnetic flux linked from the end face 15b side of the stator core 15 to the end face 25b of the rotor core 25 can bypass the yoke 26 on the back side of the end face 25b to make the separate rotor core 25 a magnetic path. A closed magnetic circuit can be formed by interlinking the end face 15b of the stator core 15 facing the end face 25b of the rotor core 25 again.

  The induction coil 21 is arranged on the end 25a side which can be separated from the yoke 26 of the rotor core 25 and can effectively link the spatial harmonic magnetic flux from the stator core 15, and the field coil 22 is The rotor core 25 is arranged on the side of the connecting portion 25c close to the yoke 26.

  Accordingly, the rotating electric machine 100 can link the magnetic flux from the end face 15b of the stator core 15 to the end face 25b of the rotor core 25 with a high density through the small gap G, and a spatial harmonic component included in the linked magnetic flux. An induced current can be generated in the induction coil 21 by (change in magnetic flux density with respect to the fundamental wave) and supplied to the field coil 22.

  The field coil 22 can generate a magnetic flux (electromagnetic force) by self-exciting the induction current received from the induction coil 21 as a field current, and the magnetic flux is transmitted from the end face 25 b of the rotor core 25 to the stator core 15. The end face 15b can be linked.

  For this reason, the rotating electric machine 100 can obtain magnet torque (auxiliary rotating force) separately from the magnetic flux of the armature coil 11 that generates the main rotating force, and can assist the rotational driving of the rotors 120 and 130.

  At this time, the rotating electric machine 100 generates the electromagnetic force by making the rotor core 25 function as an electromagnet by supplying the alternating current induced by the induction coil 21 to the field coil 22 as a direct current field current. Therefore, the induction coil 21 and the field coil 22 are respectively incorporated in the closed circuit 30 shown in FIG. 11 in order to effectively use the AC induction current.

  The induction coil 21 and the field coil 22 form a closed circuit 30 together with diodes (rectifying elements) 29A and 29B, with two sets of a rotor core 25 and a rotor slot 27 at adjacent positions as one set.

  As shown in FIG. 11, the closed circuit 30 has two ends of two field coils 22 connected in series and two ends of two induction coils 21 connected in parallel via diodes 29A and 29B, respectively. It is connected.

  Specifically, the closed circuit 30 is concentratedly wound in the same direction as the first connection end 22p on one side of the two field coils 22 that are concentratedly wound in the opposite direction and connected in series. The two first connection ends 21p of the two induction coils 21 connected in parallel with each other are connected at one connection point. The second connection end 22q on the other side of the two field coils 22 connected in series is connected to the cathode-side connection pins (connection terminals) 29c of both the diodes 29A and 29B, and is also connected in parallel. The two second connection ends 21q of the two induction coils 21 are connected to the respective anode-side connection pins 29c of the diodes 29A and 29B. That is, the diodes 29A and 29B are packaged in a cathode common type in which the connection pins 29c connecting the respective cathode sides are exposed to the outside, and the anode connection pins 29c are exposed to the outside as they are.

  The diodes 29A and 29B are connected to each other so as to have a phase difference of 180 degrees, and are formed in a neutral point clamp type full-wave rectifier circuit for inverting one induced current and summing half-wave rectified outputs. .

  Thus, in the rotating electric machine 100, the closed circuit 30 is configured by two sets of the adjacent induction coil 21 and the field coil 22 and one set of the diodes 29A and 29B, but the induction coils 21 in the closed circuit 30 are the same. The field coil 22 is wound in such a manner that the winding direction is alternately arranged in the entire circumferential direction of the rotors 120 and 130.

  For this reason, in the rotating electric machine 100, the magnetization directions of the electromagnets generated in the field coil 22 of the rotor core 25 by the application of the DC power (field current) obtained by self-excitation are alternated in the circumferential direction, and the stator The north pole and the south pole alternately face the stator core 15 of 110.

  In the rotary electric machine 100, six sets of the closed circuit 30 illustrated in FIG. 11 are juxtaposed in the circumferential direction of the rotors 120 and 130. That is, as shown in FIG. 12, the diode cases 32 accommodating the diodes 29A and 29B are arranged on the back side of the rotor core 25 of the yoke 26 so as to be parallel to the circumferential direction of the rotors 120 and 130.

  In the rotating electric machine 100, the configuration of the salient pole number P of the rotor core 25 around which the induction coil 21 and the field coil 22 are wound in the rotors 120 and 130 and the number of slots S of the status lot 17 in which the armature coil 11 is installed in the stator 110. By adopting a structure in which the ratio (combination) is P / S = ２, the waveform of the harmonic magnetic flux linked to the induction coil 21 of each closed circuit 30 is made common.

  For this reason, the induced current generated by the induction coil 21 without a phase difference can be supplied to the field coil 22 as the same field current rectified by the diodes 29A and 29B, and the generated electromagnetic force is effectively used without loss. Thus, the rotors 120 and 130 can be driven to rotate efficiently and with high quality.

  With such a circuit configuration, the rotating electric machine 100 of the present embodiment is segmented into six sets for each closed circuit 30, so that all of the induction coil 21 and the field coil 22 of the rotors 120 and 130 are two diodes. It is possible to avoid that the winding resistance is integrated and becomes a high resistance value, as compared with a case where a series circuit in which the coils are rectified by 29A and 29B and functions as an electromagnet is used.

  Thus, for example, when the rotors 120 and 130 are rotated at a low speed in order to make the vehicle run at a low speed, the change in the amount of magnetic flux linked to the induction coil 21 is small, and the generated induction current is also small. However, in the rotating electric machine 100, the waste in the winding resistance of the induction coil 21 and the field coil 22 is reduced (the limiting resistance value is reduced), and the field coil 22 is excited without wasteful power consumption. Can be. Thus, the electromagnetic force can be efficiently generated, and the rotational force generated by the armature coil 11 of the stator 110 can be effectively assisted.

  At this time, the induction voltage generated by the induction coil 21 and the field voltage generated by the field coil 22 can also be dispersed and suppressed to a low voltage, and the copper loss generated by energizing the winding can be reduced. it can. Therefore, it is possible to prevent a situation in which a desired torque cannot be obtained due to an excessively high voltage value.

  Incidentally, lowering the resistance and lowering the voltage of the induction coil 21 and the field coil 22 can also be achieved by connecting each of the induction coil 21 and the field coil 22 in parallel. However, in each of the induction coil 21 and the field coil 22 having both ends connected in parallel, an induced voltage is generated in a direction to cancel the generation (change) of the magnetic flux, so that the parallel circuit of the induction coil 21 and the field coil 22 is generated. A circulating current is generated in the inside, thereby preventing the generation of magnetic flux (magnetic force). For this reason, as the rectifier circuit of the rotating electric machine 100, it is preferable to arrange six sets of the closed circuits 30 on the rotors 120 and 130, respectively.

  Specifically, in the closed circuit 30, the connection pins 29 c of the diodes 29 A and 29 B in the diode case 32 are connected to the induction coil 21 and the field coil 22 via a plurality of connection members 33. As shown in FIG. 13, the diode case 32 and the connection material 33 are formed on a holder hole 36 of a resin-made (for example, PPS resin) connection base 35 installed on the back side of the rotor core 25 of the yoke 26 and the connection material. The positioning and holding can be performed using the groove 37, and the connection work can be easily performed.

  Here, the connection board 35 is formed with a holder hole 36 for setting the diode case 32 so as to be evenly spaced in the circumferential direction on the axial outer surface 35a side, and the diode case 32 is provided in the holder hole 36. It is designed to be attached by a tightening bolt 39. The connection board 35 has a holder hole 36 such that the connection pins 29c of the diodes 29A and 29B protruding from the diode case 32 to the outside extend radially around the axis and are installed toward the outer peripheral side. Are arranged. Thus, the connection board 35 is formed so as to be installed more compactly than when the connection pins 29c of the diodes 29A and 29B are arranged along the circumferential direction.

  In the connection board 35, the first and second connection ends 21p, 21q, 22p, 22q are drawn out from the α-wound windings (rectangular wires 21L, 22L) of the induction coil 21 and the field coil 22. The wiring board 35 is formed so as to be bent along the outer peripheral surface 35b of the connection base 35 while maintaining a predetermined interval for insulation, and extends in a direction toward the outer surface 35a (back side).

  On the other hand, a plurality of radial grooves 37 a and a plurality of circumferential grooves 37 b are formed in the connection base 35 as the connection material grooves 37. The radial groove 37a of the connection material groove 37 is connected to the first and second connection ends 21p, 21q, 22p, 22q of the induction coil 21 and the field coil 22 and the connection pins outside the diode case 32 (diodes 29A, 29B). The outer surface 35a is formed in a shape that is continuous in the radial direction from the outer surface 35a side to the outer peripheral surface 35b side in a wide concave shape so as to be able to accommodate both of them. Three circumferential grooves 37b of the connecting material groove 37 are formed with different widths from the axis so as to connect the circumferential groove 37b to the radial groove 37a with a width approximately equal to that of the connecting material 33.

  As shown in FIGS. 11 and 12, the connection material 33 includes a plurality of radial wires (first conductors) 33 a installed in the radial grooves 37 a of the connection material grooves 37, and a connection material groove 37. The induction coil 21 and the field coil 22 are connected to the diodes 29A and 29B by appropriately welding or soldering a plurality of circumferential wires (second conductors) 33b installed in the circumferential groove 37b. The connection routes R1 to R5 for connection are formed. Here, the connection material 33 can be easily connected by forming it in conformity with the shape of the connection material groove 37 (37a, 37b), and the heat radiation characteristic can be obtained by forming it in a belt shape. Can also be improved.

  In detail, the connection path R1 is electrically connected between the first connection end 22p on one side of the two field coils 22 and the two first connection ends 21p of the two induction coils 21. ing. In the connection path R2, the first and second connection ends 22p and 22q between the two field coils 22 connected in series are electrically connected. The connection paths R3 and R4 are electrically connected between the two second connection ends 21q of the two induction coils 21 connected in parallel and the respective anode-side connection pins 29c of the diodes 29A and 29B. . In the connection path R5, the second connection end 22q on the other side of the two field coils 22 connected in series and the connection pins 29c on the cathode sides of the diodes 29A and 29B are electrically connected.

  As shown in FIG. 14, the holding plate 41 is attached to the opposite side of the connection base 35 so as to be interposed between the rotors 120 and 130 and the stator 110, in other words, to face the holding frame 16. ing. The holding plate 41 is configured to fit the end portion 25a side of the rotor core 25 into the holding hole 41a that is opened, and hold the rotor core 25 in a state where the end surface 25b is exposed.

  In the holding board 41, hooks 42 to be inserted into gaps in the radial groove 37a of the outer peripheral surface 35b of the connection base 35 are integrally formed at a plurality of locations on the outer peripheral side between the holding holes 41a. Specifically, the hook 42 is inserted into a gap adjacent to the first connection end 21p of the induction coil 21 and is hooked on the outer surface 35a of the connection board 35.

  The holding plate 41 is exposed from the holding hole 16 a of the holding frame 16 while holding the induction coil 21 and the field coil 22 wound around the rotor core 25 by hooking the hook 42 on the outer surface 35 a side of the connection base 35. The end face 25b exposed from the holding hole 41a is kept close to the end face 15b of the stator core 15. The holding plate 41 is made of a non-magnetic material so as not to hinder the formation of the magnetic circuit. For example, the holding plate 41 is made of a resin material ( For example, it may be manufactured by molding PPS resin).

  In addition, the rotors 120 and 130 are adapted to house and protect a portion from the outer surface 35a side of the connection base 35 to the holding plate 41 in a cover 45 formed in a bottomed and short cylindrical shape. Is manufactured by molding a non-magnetic metal plate, for example, a brass plate so as not to affect the formation of a magnetic path during operation.

  The cover 45 has, on the inner peripheral surface side of the outer peripheral wall 46, a convex-shaped portion 46 a (see FIG. 15) fitted into a radial groove 37 a provided on the outer peripheral surface 35 b of the connection base 35. . Further, a through hole 45d is formed around the opening 45c of the axis so that the screw portion of the tightening bolt 39 for fixing the diode case 32 set in the holder hole 36 of the connection base 35 passes therethrough.

  Thereby, the cover 45 can be positioned and covered in the circumferential direction by fitting the convex portion 46a of the outer peripheral wall 46 into the radial groove 37a of the outer peripheral surface 35b of the connection base 35. Further, the fastening bolt 39 can be inserted into the through hole 45d around the opening 45c to be attached in a state of being in close contact with one surface side of the diode case 32 in the holder hole 36 of the connection base 35. Thus, the cover 45 can function as a heat radiating member that exchanges heat generated when the diodes 29A and 29B perform a rectifying operation and discharges the heat to the outside. Further, the diode case 32 (diodes 29A and 29B) can be replaced simply by loosening and removing the fastening bolt 39 from the connection board 35, and the workability can be improved.

  Further, the rotors 120 and 130 have injection ports 41b at a plurality of positions between the adjacent holding holes 41a. Then, with the rotors 120 and 130 in a state where the cover 45 is attached to the connection base 35, a gap D1 formed between the outer peripheral wall 46 of the cover 45 and the outer peripheral edge 41c of the holding board 41 (see FIG. 15). In addition, a PPS resin can be injected (injected) from a gap D2 (see FIG. 15) formed between the cylindrical portion 23 on the axial center side of the rotor core 25 and the inner peripheral edge 41d of the holding plate 41 and an inlet 41b. It has become.

  At this time, in the rotors 120 and 130, as shown in FIG. 15, the injection amount of the PPS resin is adjusted so that the outer surface 35a side of the connection board 35 is not buried. The inside of the rotor slot 27 is filled with PPS resin and solidified.

  As a result, the PPS resin can be injected into the gap between the members such as the rotor slot 27 also in the rotors 120 and 130, and the rotor core 25, the induction coil 21 and the field coil 22 can be prepared without preparing an injection filling mold. A resin mold MoR in which the PPS resin is allowed to penetrate into the gap between them and is fixed. For this reason, since each member is held by the resin mold MoR, movement due to centrifugal force or vibration is restricted, and electromagnetic vibration and the like can be suppressed by stabilizing characteristics. Further, robustness against centrifugal force, vibration and impact can be ensured. In addition, by using the resin mold MoR, penetration of moisture and the like can be restricted, and durability can be improved.

  At this time, the outer surface 35a side of the connection board 35 does not become buried with the PPS resin, and the work of exchanging the diode case 32 (the diodes 29A and 29B) by removing the cover 45 from the connection board 35 does not occur. .

  And, as shown in FIG. 1, the rotating electric machine 100 has a stator 110 and rotors 120 and 130 housed in a motor case 150. In the rotary electric machine 100, both ends of the shaft 101 are rotatably supported by bearings 159 provided on end plates 152 and 153 on both ends in the axial direction of the motor case 150. An outer peripheral side of a stator 110 that rotatably supports the shaft 101 by a bearing 108 is connected to a side plate 154 of a motor case 150 so that electric power is supplied to the armature coil 11.

  The rotating electric machine 100 supplies power to the armature coil 11 of the stator 110 to rotate the rotors 120 and 130 so that the rotating torque is exposed (projected) to the outside of the end plate 153 of the motor case 150. The output is output to the load side connected to the connection end 101a. The rotation of the shaft 101 (rotors 120 and 130) is such that a rotation sensor such as a resolver (not shown) is attached to a rotation end portion 101b protruding from an end plate 152 of the motor case 150 to detect a rotation speed and the like. The rotating end 101b is protected by installing a guard case 156 for preventing damage on the outside of the end plate 152.

  As shown in FIG. 16, the shaft 101 forms step portions 102 and 103 having different diameters at installation positions where the stator 110 and the rotors 120 and 130 are to be mounted, and positions and attaches the stator 110 and the rotors 120 and 130 in the axial direction. It has become. The stator 110 is attached to the shaft 101 with the step 102 positioned on the axial center side. The rotors 120 and 130 are attached to the shaft 101 with the installation surfaces 101r on both sides in the axial direction of the stepped portion 102 positioned on the axial center side.

  The rotors 120 and 130 have both end surfaces 102a and 102b (rotor positioning) of a step portion 102 formed to have a diameter larger than the installation surface 101r of the shaft 101 into which the inner peripheral surface 23a of the cylindrical portion 23 on the axial center side of the yoke 26 is fitted. , The first and second rotor stepped portions), the fastening rings 105 and 106 are engaged with screw portions (not shown) at both ends on the basis of the state where the cylindrical portion 23 is brought into contact with the cylindrical portions 23 and fastened in the approaching direction. In this way, positioning is performed in the axial direction. As shown in FIG. 17, the rotors 120 and 130 are continuous with the key groove 24 formed on the inner peripheral surface 23a side of the cylindrical portion 23 in the axial direction of the installation surface 101r of the shaft 101, as shown in FIG. The key member 129 is fitted into the key groove 104 to be positioned.

  As shown in FIG. 16, the shaft 101 has a step portion 103 having a larger diameter formed on one end side of the step portion 102 for positioning the rotors 120 and 130 so that the end face 102 b is common. The stator 110 is positioned and attached with reference to the step 103.

  As shown in FIG. 1, the stator 110 has a bearing receiver 107 installed on the inner peripheral side of the holding frame 16 to rotatably support the bearing 108. Are positioned in the axial direction with reference to a state where the end surface 103a (stator positioning portion, stator step portion) opposite to the common end surface 102b is abutted. Further, the stator 110 is provided with a fixing bolt 119 that is inserted into the screw hole 16h of the thick portion 16d of the holding frame 16 in the rotation direction, and a screw of the flange portion 155 formed on the inner peripheral surface side of the side plate 154 of the motor case 150. The positioning is performed by tightening into the stop hole 155a. With this structure, the stator 110 has its outer peripheral side fixed to the side plate 154 of the motor case 150, so that the flexural vibration in the axial direction can be reduced.

  Thus, the rotating electric machine 100 has its shaft 101 rotatably supported by the bearings 159 and 108 installed on the end plates 152 and 153 of the motor case 150 and the holding frame 16 of the stator 110. The rotors 120 and 130 are fixed so as to sandwich the stator 110 and are integrally rotated.

  With this structure, as shown in FIG. 18, the rotating electric machine 100 is configured such that both end surfaces 15 b of the stator core 15 fixed to the motor case 150 side and the end surface 25 b of the rotor core 25 fixed to the shaft 101 side face each other via the gap G. Thus, the rotors 120 and 130 can be rotatably supported. Further, in the rotating electric machine 100, an alternating current is supplied from the vehicle-mounted battery to the armature coil 11 of the stator 110 to generate a rotating magnetic field, so that the induction coil 21 of the rotors 120 and 130 is linked with the harmonic magnetic flux. An induced current can be generated, and the induced current can be rectified and supplied to the field coil 22 as a field current to function as an electromagnet to obtain rotational torque.

  Here, the induction coil 21 and the field coil 22 perform a magnetic field analysis and perform a harmonic magnetic field analysis so as to effectively use the third-order time harmonic magnetic flux linked from the end face 15b of the stator core 15 to the end face 25b of the rotor core 25. After confirming the road, it is installed so that induced current can be generated efficiently. Specifically, as described above, by setting the composition ratio S / P of the number of slots S of the rotors 120 and 130 and the number of magnetic poles P of the stator 110 to 2/3, the time harmonic of the 3f order in the rotating coordinate system is obtained. The wave magnetic flux (f = 1, 2, 3,...) Is formed in a structure that can be used efficiently.

  More specifically, for example, in the case of a high-order time harmonic magnetic flux in the rotating coordinate system, since only a waveform oscillating only near the surface of the end face 25b of the rotor core 25, it is possible to efficiently generate an induced current in the induction coil 21. Can not. On the other hand, if the third-order time harmonic magnetic flux in the rotating coordinate system is to be collected, since the frequency is higher than the fundamental frequency input to the armature coil 11, it pulsates in a short cycle and is effectively applied to the induction coil 21. An induced current can be generated. Therefore, it is possible to efficiently recover and rotate the loss energy of the spatial harmonic component superimposed on the magnetic flux of the fundamental frequency.

  In addition, as can be seen from the magnetic field analysis of the magnetic flux density distribution in the same manner as described above, the magnetic flux density distribution is also distributed in the circumferential direction within the mechanical angle of 360 degrees according to the ratio between the number of rotor teeth salient poles P and the number of status lots S. Therefore, the distribution of the electromagnetic force acting on the stator 110 is also unevenly distributed.

  For this reason, the rotary electric machine 100 adopts a structure in which the composition ratio S / P between the number of slots S of the rotors 120 and 130 and the number of magnetic poles P of the stator 110 is 2/3, so that the entire circumference with a mechanical angle of 360 degrees is used. The magnetic fluxes having a uniform density distribution can be linked to each other, and the rotors 120 and 130 can be relatively rotated with high quality while facing the stator 110.

  As a result, in the rotating electric machine 100, the spatial harmonic magnetic flux can be effectively used without causing loss, the loss energy can be efficiently recovered, the electromagnetic vibration can be significantly reduced, and the rotation can be performed with high silence. .

  In addition, since the induction coil 21 and the field coil 22 adopt the concentrated winding structure, there is no need to perform winding in the circumferential direction over a plurality of slots, and the overall size can be reduced. Further, the induction coil 21 can efficiently collect and generate an induced current due to linkage of a low-order third-order time harmonic magnetic flux while reducing copper loss loss on the primary side in the rotating coordinate system. Energy loss can be increased.

  Furthermore, the induction coil 21 generates an induced current more effectively by using the third-order time harmonic magnetic flux in the rotating coordinate system than by using the second-order time harmonic magnetic flux in the rotary coordinate system. be able to. More specifically, when the induced current uses the third-order time harmonic magnetic flux than the second-order magnetic flux, the time change of the magnetic flux can be increased and the current can be increased, and the current can be efficiently collected.

  In this way, as shown in the model diagram in FIG. 19, the rotating electric machine 100 includes the rotor cores 25 of the rotors 120 and 130 with the gap G interposed between both end surfaces 15 b of the stator core 15 around which the armature coil 11 of the stator 110 is wound. The end face 25b faces each other. The induction coil 21 is wound around the end side 25a of each rotor core 25, and the field coil 22 is wound around the yoke 26 (connection portion 25c) of each rotor core 25.

  As a result, as shown in FIG. 20, the rotating electric machine 100 links the magnetic flux MF generated by energizing the armature coil 11 between the stator core 15 and the rotor cores 25 on both sides to bypass the yoke 26. Can be formed, and the two rotors 120 and 130 can be rotated relative to the stator 110. In addition, the spatial harmonic magnetic flux HF superimposed on the magnetic flux MF is also linked from the stator core 15 to the rotor cores 25 on both sides, and is efficiently recovered by the induction coils 21 on the respective end portions 25a to reduce the induced current. A field current obtained by rectifying the induced current by the diodes 29A and 29B can be supplied to the field coil 22. For this reason, for example, in FIG. 21, the rotating electric machine 100 is configured such that the magnetic flux density of the third-order time harmonic magnetic flux HF linked between the stator core 15 and the two rotor cores 25 on both sides is indicated by a magnetic flux vector V. The spatial harmonic flux HF is linked to the high magnetic flux density between the stator core 15 and the two rotor cores 25 on both sides, so that the shaft 101 can be rotated with a large magnet torque.

  On the other hand, for example, in a radial gap type rotating electrical machine in which a stator and a rotor face each other via a gap in a radial direction, in the case of a structure in which inner rotors and outer rotors having different diameters are arranged so as to sandwich the stator, Since the area facing the stator in the radial direction differs greatly between the inner rotor and the outer rotor, a large difference occurs in the rotational torque.

  For this reason, the radial gap type rotating electric machine cannot structurally secure a larger area for interlinking the spatial harmonic magnetic flux than the axial gap type rotating electric machine. There is a characteristic that it is difficult to effectively link even if the amount of generated magnetic flux is increased. Conversely, the axial gap type rotating electric machine 100 has a structure in which the leakage magnetic flux is larger than that of the radial gap type, but has a structure capable of effectively recovering the leakage, so that the spatial harmonic magnetic flux is effectively linked. be able to.

  For example, in the case of a radial gap type rotating electric machine using one rotor, as shown in FIG. 22, one rotor core 945 is connected to one end face 935 b of a stator core 935 around which an armature coil 931 is wound via a gap G. The structure is such that the end face 945b faces each other. With such a structure, the spatial harmonic magnetic flux HF superimposed on the magnetic flux MF generated by energizing the armature coil 931 cannot be recovered more efficiently than the axial gap type, and it is difficult to generate a large magnet torque. In addition, iron loss on the yoke 946 side is increased as compared with the axial gap double rotor type rotary electric machine 100.

  Further, as shown in FIG. 23, even in the radial gap type rotating electric machine, in order to collect more spatial harmonic magnetic flux HF, a collecting pole core 948 for collection is arranged in a rotor slot 947 between the rotor cores 945. It is also conceivable that the induction coil 949 is wound around. However, even with such a structure, since the spatial harmonic magnetic flux HF leaking to one side of the stator core 935 can be recovered, the obtained magnet torque is smaller than that of the rotating electric machine 100. Further, in such a structure, since the auxiliary pole core 948 for linking magnetic flux is provided between the rotor cores 945, the salient pole ratio on the rotor side is reduced.

  Furthermore, the rotating electric machine 100 arranges the armature coil 11, the induction coil 21, and the field coil 22 in which the winding coils are concentratedly wound on the stator 110 and the rotors 120 and 130, respectively. It can also be wound. However, the magnetic flux density interlinking between the end face 15b of the stator core 15 and the end face 25b of the rotor core 25 is compared with the case where the armature coil 11, the induction coil 21 and the field coil 22 are concentratedly wound or distributedly wound. A magnetic flux density waveform as shown in FIG. When this magnetic flux density waveform is subjected to electromagnetic field analysis, as shown in FIG. 25, in the case of concentrated winding, the secondary spatial harmonic magnetic flux in the stationary coordinate system (the third time harmonic magnetic flux in the rotating coordinate system) is distributed. It turns out that it contains more than the case of winding. As a result, in the rotating electric machine 100, by employing concentrated winding, more spatial harmonic magnetic flux deeply penetrating into the end face 25b of the rotor core 25 is linked to the induction coil 21 than in the case of distributed winding, and the induced current is reduced by the field current. The current can be supplied to the field coil 22.

  From this, as shown by the torque waveform in FIG. 26, when the axial gap double rotor type rotating electric machine 100 starts supplying the alternating current to the armature coil 11 of the stator 110, as shown by the solid line in the drawing, The shaft 101 can be rotated with high torque. On the other hand, a radial gap type structure without an auxiliary pole as shown by a dashed line in FIG. 26 as shown in FIG. 22 and a radial gap type as shown in FIG. With this structure, a large torque cannot be obtained unlike the axial gap double rotor type rotating electric machine 100. Further, as shown by a dotted line in FIG. 26, in order to obtain high torque, even in the structure of an IPMSM (Interior Permanent Magnet Synchronous Motor) in which a permanent magnet is embedded in the rotor to utilize the magnet torque, an axial gap double rotor is used. It can be seen that the shaft 101 cannot be rotationally driven with a large torque unlike the rotary electric machine 100 of the mold type.

  As shown in FIG. 27, the rotating electric machine 100 has cooling fins 61 formed at a plurality of locations on the outer surface 45a side of the cover 45. The cooling fins 61 are configured to convect the air in the motor case 150 while avoiding a rotational load by using the inclined surface 61a on the side facing the rotation direction.

  Accordingly, in the rotating electric machine 100, the cover 45 main body that houses the connection base 35 of the rotors 120 and 130 internally generates heat transmitted during the rectifying operation of the diodes 29 </ b> A and 29 </ b> B to cover the surface of the cover 45 including the cooling fins 61. The heat can be efficiently exchanged with the outside air or the like. As a result, heat can be effectively dissipated, and a decrease in rotational efficiency due to a rise in temperature can be suppressed. In addition, the rotating electric machine 100 also includes a coolant channel 109 that passes through the axis of the shaft 101.

  As described above, in the present embodiment, the armature coil 11, the induction coil 21, and the field coil 22, which are parallel to each other around the shaft 101, are formed into an axial gap type double rotor structure. , 130, the spatial harmonic magnetic flux superimposed on the main magnetic flux generated by the armature coil 11 is effectively linked to the induction coil 21 of the rotors 120, 130 provided on both sides of the stator 110. be able to. Thus, the induction current generated in the induction coil 21 can be efficiently supplied to the field coil 22 as a field current.

  Therefore, by using the spatial harmonic magnetic flux effectively without using a permanent magnet (without lowering the magnetic force due to the spatial harmonic magnetic flux) and without supplying power from the outside, By applying a magnet torque to each of the rotors 120 and 130 together with the reluctance torque, the rotors 120 and 130 can be driven to rotate with a large torque.

  Further, the armature coil 11 is configured such that the flat wire 11L is α-wrapped around the core material (the stator core 15), and the end 11La and the end 11Lb are drawn out to the outer peripheral side of the stator 110 as it is in the winding direction. Thereby, the winding coil can be formed by effectively utilizing the space between the holding frame 16. With such a structure, the end 15a of the core material is exposed from the holding hole 16a of the holding frame 16 to be sandwiched, that is, in a so-called offset state, and can be supported in contact with the entire circumference of the winding. In addition, it can be compactly connected by being pulled out from the orbital portion and bent.

  Further, the induction coil 21 and the field coil 22 are formed by α-winding the flat wires 21L, 22L around the core material (the rotor core 25) and orbiting the first connection ends 21p, 22p and the second connection ends 21q, 22q. It can be pulled out to the outer peripheral side of the rotors 120 and 130 in the same direction, and the winding coil can be formed by effectively utilizing the space between the holding plate 41 and the rotor. Due to such a structure, the end portion 25a of the core material is exposed from the holding hole 41a of the holding board 41 and is sandwiched, that is, in a so-called offset state, and can be supported in contact with the entire circumference of the winding. In addition, it can be compactly connected by being pulled out from the orbital portion and bent.

  Further, the armature coil 11 has a ring-shaped plate-shaped bus bar 12 (12u, 12v, 12w, 12a) extending along the outer peripheral side of the stator 110 in two upper and lower stages in which the plane direction of the plate is orthogonal to the axis. Since they are installed, they can be compactly connected and connected on the outer peripheral side of the stator core 15 and can be easily manufactured.

  Here, as another aspect of the present embodiment, not only a single stator and double rotor in which the stator 110 is sandwiched between the rotors 120 and 130 but also an axial gap motor of a double stator and single rotor in which the rotor is sandwiched between the stators. The same operation and effect can be obtained by constructing.

  Further, the winding coil is not limited to the case where a copper wire is used for the winding, but may be, for example, an aluminum conductor or a litz wire of a stranded wire for high-frequency current.

  The rotating electric machine 100 may be constructed as a hybrid type in which permanent magnets are additionally arranged on the rotors 120 and 130, and the magnet torque may be obtained in a hybrid field type.

  Further, as the rectifying element, not only the diodes 29A and 29B but also a semiconductor element such as another switching element may be employed, and the rectifying element is not limited to the type housed in the diode case 32 but is mounted inside the rotors 120 and 130. You may make it.

  The rotating electric machine 100 is not limited to a vehicle-mounted type, and can be suitably used as a driving source for a wind power generator, a machine tool, or the like.

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

11 Armature coils 12a, 12u, 12v, 12w Bus bar 15 Stator core 15a End 15k Notch (recess)
16 Holding frame (holding plate, frame member)
16a Holding hole 16t Projection (projection)
17 Status Lot 21 Induction Coil 21p, 21q Connection End 22 Field Coil 22 Connection End 22p, 22q Connection End 25 Rotor Core 25a End 26 Yoke 27 Rotor Slot 29A, 29B Diode (Rectifier)
29c connection pin 30 closed circuit 32 diode case 33 connection material 33a radial wire (first conductor)
33b circumferential wire (second conductor)
35 Connection Base 36 Holder Hole 37 Connection Material Groove 39 Tightening Bolt 41 Holding Board 41a Holding Hole 42 Hook 45 Cover 46 Outer Wall 61 Cooling Fin 100 Rotating Electric Machine 101 Shaft 102, 103 Step 102a, 102b End Face (Rotor Positioning Part, (First and second rotor steps)
103a End face (stator positioning part, stator step part)
108, 159 Bearing 110 Stator 120 Rotor 150 Motor case 155 Flange D1 Gap D2 Gap G Gap MoR, MoS Resin mold

Claims (6)

A rotor that is driven to rotate about a rotation axis,
A stator in which the rotor faces in the axial direction of the rotating shaft;
A plurality of armature coils arranged around the axis of the rotation axis of the stator,
A plurality of induction coils and a plurality of field coils arranged around the axis of the rotation axis of the rotor,
A rectifying element for rectifying an induced current generated in the induction coil and supplying the rectified current to the field coil,
At least one of the armature coil, the induction coil and the field coil is formed of a strip-shaped rectangular wire,
The flat wire is wound around the core material in two steps so that the wide surface of the flat wire contacts the radial outer peripheral surface of the core material in the axial direction of the rotation shaft,
The flat wire wound around the core material in the two stages is a single coil in which the first stage and the second stage wound around the core material are composed of the same coil,
An axial gap type rotating electric machine, wherein two ends of each of the single coils are drawn radially from the core material. The armature coil is formed by the rectangular wire,
The two ends of the rectangular wire forming the armature coil,
One is an input end to which a current is input, the other is an output end to output the current,
An input-side bus bar facing the input-side end in the axial direction of the rotation shaft;
An output-side bus bar facing the output-side end in the axial direction of the rotating shaft,
The input-side bus bar has an input-side fastening portion that projects to the input-side end and can be fastened to the input-side end,
The axial gap type rotary electric machine according to claim 1, wherein the output-side bus bar has an output-side end fastening portion that protrudes toward the output-side end and can be fastened to the output-side end.   The axial gap according to claim 2, wherein the input-side bus bar and the output-side bus bar are formed in a plate shape, and are installed such that the plate-shaped plane is parallel to a direction intersecting the rotation axis. Type rotating electric machine. The rectifying element is disposed axially outside the rotation axis of the rotor,
The induction coil and the field coil are formed by the rectangular wire,
The two ends of the rectangular wire forming the field coil and the induction coil are both drawn radially from the core material and then drawn outward in the axial direction of the rotating shaft,
The axial gap type rotating electric machine according to claim 2 or 3, wherein the end portions of the field coil and the induction coil are arranged at a predetermined insulation interval in a circumferential direction from each other.   The armature coil has an exposed portion where the winding is not wound around both ends of the core material, and a portion where the winding is wound is sandwiched between two holding plates having holding holes into which the exposed portion is fitted. The axial gap type rotating electric machine according to any one of claims 1 to 4, which is installed on the stator.   6. The armature coil according to claim 5, wherein a protrusion and a recess that are fitted and positioned with respect to each other are arranged at positions corresponding to an exposed portion of the core material and an edge of the holding hole of the holding plate. 7. The described axial gap type rotating electric machine.

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