JP6225975B2 - Rotating electric machine for internal combustion engine - Google Patents

Description

  The invention disclosed herein relates to a rotating electrical machine for an internal combustion engine connected to the internal combustion engine.

  Patent documents 1-6 disclose a rotating electrical machine for an internal combustion engine connected to the internal combustion engine. These rotating electric machines can function as a generator and / or an electric motor. Patent Document 1 describes a rotational position sensor for detecting the rotational position of a rotor. Patent Document 2 and Patent Document 3 describe a stator having a generator coil and a motor coil.

  The contents of the prior art documents listed as the prior art are introduced or incorporated by reference as an explanation of the technical elements described in this specification.

Japanese Patent No. 5097654 Japanese Patent No. 4410680 International Publication No. 2014/136343 Pamphlet JP 2013-233030 A JP2013-27252A Japanese Patent No. 5602890

  In one viewpoint, Patent Documents 1-6 have a technical problem in that only one set of coils is provided as a coil for an electric motor. With only one set of coils, it is difficult to properly function as an electric motor in a wide rotational speed range. For example, it is difficult to provide appropriate torque and exhibit high efficiency at both low speed rotation at the start of the internal combustion engine and medium speed and high speed rotation at the time of normal operation of the internal combustion engine.

  In an additional aspect or another independent aspect, Patent Document 2 and Patent Document 3 describe a plurality of coils including a coil for a generator and a coil for an electric motor. There is a technical problem in that the specific arrangement of the electric wires is not described. A technology for arranging a plurality of coils in a compact manner and realizing excellent productivity is not described. For example, when a plurality of coils are provided on the stator, it is difficult to dispose connection electric wires (crossover wires and lead wires) on the stator. When a plurality of coils are arranged on a plurality of salient poles, a jumper wire for connecting in-phase coils in series and a lead wire for input and / or output to the coil are complicatedly arranged. Furthermore, when a rotational position detector is arrange | positioned like the patent document 1 in the one part angular range of a stator, the electric wire for a connection and a rotational position detector may interfere.

  In the above-mentioned viewpoints or other aspects not mentioned, there is a need for further improvements in rotating electrical machines for internal combustion engines.

  One object of the present invention is to provide a rotating electrical machine for an internal combustion engine that can appropriately function as an electric motor in a wide rotational speed range.

  Another object of the present invention is to provide a rotating electrical machine for an internal combustion engine that can provide a plurality of multiphase windings suitable for different rotational speeds.

  Another object of the present invention is to provide a rotating electrical machine for an internal combustion engine in which a plurality of coils can be easily arranged on a single stator.

  Another object of the present invention is to provide a rotating electrical machine for an internal combustion engine in which connecting wires for a plurality of coils providing a plurality of multiphase windings suitable for different rotational speeds can be arranged in a compact manner.

  Another object of the present invention is to provide a rotating electrical machine for an internal combustion engine that can avoid interference between a connecting wire and a rotational position detector on a stator.

  The invention disclosed herein employs the following technical means to achieve the above object. Note that the reference numerals in parentheses described in the claims and in this section indicate a corresponding relationship with specific means described in the embodiments described later as one aspect, and limit the technical scope of the invention. Not what you want.

According to one disclosed invention, a rotating electrical machine for an internal combustion engine is provided. The invention includes a rotor (21) in which a permanent magnet (23) for providing a field is disposed on an inner surface of a rotor core (22) connected to a rotation shaft of the internal combustion engine (12), and a body of the internal combustion engine (12). A stator core (32) which is disposed inside the rotor by being fixed to (13) and forms a plurality of magnetic poles (32a) facing the permanent magnet on the radially outer side, and a stator coil mounted on the stator core; A first multiphase winding (33p), a second multiphase winding (33s) in phase with the first multiphase winding, and each multiphase winding for connecting to an external electric circuit A stator coil (33, 433) having a plurality of lead wires (46, 71, 571), the stator coil includes a plurality of coils, and one coil is wound around one magnetic pole, The first coil A phase winding and a second multiphase winding are provided, and the first multiphase winding is a part of a plurality of coils having the same phase, and on a stator including a stator core and a stator coil. The second multiphase winding is a remaining coil among the plurality of coils in the same phase, mechanically located at equal intervals, arranged in point symmetry, and having a plurality of coils connected in parallel to each other. It is characterized by that.

  According to the present invention, the first multiphase winding and the second multiphase winding are arranged on a common stator core. Therefore, a compact configuration can be provided. Also, a plurality of leader lines for the first multiphase winding and a plurality of leader lines for the second multiphase winding are provided. Thereby, the external electric circuit can provide various multiphase windings by using the first multiphase winding and the second multiphase winding.

According to one of the disclosed inventions, a rotor (21) in which a permanent magnet (23) for providing a field is disposed on an inner surface of a rotor core (22) connected to a rotation shaft of the internal combustion engine (12), and the internal combustion engine A stator core (32) which is arranged inside the rotor by being fixed to the body (13) of (12) and which forms a plurality of magnetic poles (32a) facing the permanent magnet on the radially outer side, and is attached to the stator core. A stator coil, a plurality of coils (C1-C18) mounted on a plurality of magnetic poles, and arranged to extend in the circumferential direction along the axial end surface of the stator core, and at least a portion between the plurality of coils to the stator coil (33,433) having a plurality of bus bars (71,571) to be connected, it comprises a container for accommodating a plurality of bus bars (82,95), container , At least one of a meshing portion (85) inserted between the plurality of magnetic poles, a fixing portion (86, A3) fixed to the stator core, and a fixing portion (94) fixed to the body. .
According to one disclosed invention, a rotating electrical machine for an internal combustion engine is provided. The invention includes a rotor (21) in which a permanent magnet (23) for providing a field is disposed on an inner surface of a rotor core (22) connected to a rotation shaft of the internal combustion engine (12), and a body of the internal combustion engine (12). A stator core (32) which is disposed inside the rotor by being fixed to (13) and forms a plurality of magnetic poles (32a) facing the permanent magnet on the radially outer side, and a stator coil mounted on the stator core; A plurality of coils (C1-C18) mounted on the plurality of magnetic poles, and a plurality of coils that are arranged so as to extend in the circumferential direction along the axial end surface of the stator core and at least partially connect the plurality of coils. A stator coil (33, 433) having a plurality of bus bars (71, 571) and a container (82, 95) for accommodating a plurality of bus bars, the container providing an electrical connection Have because of the connector portion (83), at least one of the plurality of bus bars, characterized in that it comprises placed connector terminal portions into the connector portion (577).
According to one disclosed invention, a rotating electrical machine for an internal combustion engine is provided. The invention includes a rotor (21) in which a permanent magnet (23) for providing a field is disposed on an inner surface of a rotor core (22) connected to a rotation shaft of the internal combustion engine (12), and a body of the internal combustion engine (12). A stator core (32) which is disposed inside the rotor by being fixed to (13) and forms a plurality of magnetic poles (32a) facing the permanent magnet on the radially outer side, and a stator coil mounted on the stator core; A plurality of coils (C1-C18) mounted on the plurality of magnetic poles, and a plurality of coils that are arranged so as to extend in the circumferential direction along the axial end surface of the stator core and at least partially connect the plurality of coils. A stator coil (33, 433) having a plurality of bus bars (71, 571) and a container (82, 95) for accommodating a plurality of bus bars, the container having a ring on which magnetic poles are arranged. A plurality of lead-in portions (84) that are arranged along the range and extend into the receiving container to connect the coil leads (33a) extending from the coils arranged around the magnetic poles to the bus bar, It has it on both sides of a direction inner side and radial direction outer side, It is characterized by the above-mentioned.
According to one disclosed invention, a rotating electrical machine for an internal combustion engine is provided. The invention includes a rotor (21) in which a permanent magnet (23) for providing a field is disposed on an inner surface of a rotor core (22) connected to a rotation shaft of the internal combustion engine (12), and a body of the internal combustion engine (12). A stator core (32) which is disposed inside the rotor by being fixed to (13) and forms a plurality of magnetic poles (32a) facing the permanent magnet on the radially outer side, and a stator coil mounted on the stator core; A plurality of coils (C1-C18) mounted on the plurality of magnetic poles, and a plurality of coils that are arranged so as to extend in the circumferential direction along the axial end surface of the stator core and at least partially connect the plurality of coils. Rotation is detected between the stator coil (33, 433) having the bus bar (71, 571) and the magnetic pole, and detects the rotational position of the rotor by detecting the magnetic flux of the permanent magnet. The rotational position sensor corresponds to the tip region of the magnetic pole, and is disposed so as to occupy at least the sensor installation range (41a) across the plurality of magnetic poles. It is arranged in a range excluding.
According to one disclosed invention, a rotating electrical machine for an internal combustion engine is provided. The invention includes a rotor (21) in which a permanent magnet (23) for providing a field is disposed on an inner surface of a rotor core (22) connected to a rotation shaft of the internal combustion engine (12), and a body of the internal combustion engine (12). A stator core (32) which is disposed inside the rotor by being fixed to (13) and forms a plurality of magnetic poles (32a) facing the permanent magnet on the radially outer side, and a stator coil mounted on the stator core; A plurality of coils (C1-C18) mounted on the plurality of magnetic poles, and a plurality of coils that are arranged so as to extend in the circumferential direction along the axial end surface of the stator core and at least partially connect the plurality of coils. A stator coil (33, 433) having a plurality of bus bars (71, 571) and a container (82, 95) for accommodating a plurality of bus bars. Characterized in that it is secured within the container by a resin (A2) which is poured in.

  According to the present invention, the plurality of coils are connected by the bus bar. According to this configuration, the connection between the coils can be provided by the bus bar.

It is sectional drawing of the rotary electric machine for internal combustion engines which concerns on 1st Embodiment of invention. It is a top view which shows the stator coil of 1st Embodiment. It is a block diagram which shows the multiphase winding of 1st Embodiment. It is a block diagram which shows the multiphase winding of 1st Embodiment. It is a top view which shows the stator of 1st Embodiment. It is a top view which shows the stator of 1st Embodiment. It is a perspective view which shows the stator of 1st Embodiment. It is a perspective view which shows the stator of 1st Embodiment. It is a flowchart which shows an example of the action | operation of 1st Embodiment. It is a top view which shows the stator of 2nd Embodiment of invention. It is a top view which shows the stator of 2nd Embodiment. It is a perspective view which shows the stator of 2nd Embodiment. It is a block diagram which shows the multiphase winding of 3rd Embodiment of invention. It is a block diagram which shows the multiphase winding of 4th Embodiment of invention. It is a top view which shows the stator coil of 4th Embodiment. It is a side view which shows the stator of 5th Embodiment of invention. It is a perspective view which shows the stator of 5th Embodiment. It is a perspective view which shows the stator of 5th Embodiment. It is a perspective view which shows the stator of 5th Embodiment. It is a disassembled perspective view which shows the stator of 5th Embodiment. It is a disassembled perspective view which shows the stator of 5th Embodiment. It is a disassembled perspective view which shows the stator of 5th Embodiment. It is a disassembled perspective view which shows the stator of 5th Embodiment. It is a disassembled perspective view which shows the stator of 5th Embodiment. It is a disassembled perspective view which shows the stator of 5th Embodiment. It is a top view which shows the bus-bar unit of 5th Embodiment. It is a fragmentary top view which shows the case of 5th Embodiment. It is a top view which shows an example of the bus-bar of 5th Embodiment. It is a front view which shows an example of the bus bar of 5th Embodiment. It is a perspective view which shows an example of the bus-bar of 5th Embodiment. It is a perspective view which shows an example of the bus-bar of 5th Embodiment. It is a top view which shows the stator coil of 5th Embodiment. It is a perspective view which shows the case of 6th Embodiment of invention. It is a perspective view which shows the case of 6th Embodiment. It is a fragmentary top view which shows the case of 6th Embodiment. It is a perspective view which shows the case of 7th Embodiment of invention. It is a front view which shows the case of 7th Embodiment. It is a disassembled perspective view which shows the case of 7th Embodiment. It is a disassembled front view which shows the case of 7th Embodiment. It is a disassembled front view which shows the case of 8th Embodiment of invention. It is a top view which shows the stator of 9th Embodiment of invention. It is a block diagram which shows the multiphase winding of 9th Embodiment. It is a block diagram which shows the polyphase winding of the modification of 9th Embodiment. It is a block diagram which shows the polyphase winding of the modification of 9th Embodiment. It is a perspective view of the manufacturing stage which shows the case of 10th Embodiment of invention. It is a perspective view of the manufacturing stage which shows the case of 10th Embodiment. It is a perspective view of the manufacturing stage which shows the case of 10th Embodiment. It is a perspective view of the finished product which shows the case of 10th Embodiment. It is the elements on larger scale which show the case of 10th Embodiment. It is the elements on larger scale which show the case of 10th Embodiment.

  A plurality of modes for carrying out the invention disclosed herein will be described with reference to the drawings. In each embodiment, portions corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals and redundant description may be omitted. Further, in the following embodiments, the correspondence corresponding to the matters corresponding to the matters described in the preceding embodiments is indicated by adding reference numerals that differ only by one hundred or more, and redundant description may be omitted. . In each embodiment, when only a part of the structure is described, the other parts of the structure can be applied with reference to the description of the other forms.

(First embodiment)
In FIG. 1, a rotating electrical machine for an internal combustion engine (hereinafter simply referred to as a rotating electrical machine) 10 is also called a generator motor or an AC generator starter. The rotating electrical machine 10 is electrically connected to an electric circuit 11 including an inverter circuit (INV) and a control device (ECU). The electric circuit 11 provides a three-phase power conversion circuit. An example of the application of the rotating electrical machine 10 is a generator motor of a vehicle internal combustion engine 12. The rotating electrical machine 10 can be used for a motorcycle, for example.

  When the rotating electrical machine 10 functions as a generator, the electric circuit 11 provides a rectifier circuit that rectifies the AC power output and supplies the electric load including the battery. The electric circuit 11 provides a signal processing circuit that receives a reference position signal for ignition control supplied from the rotating electrical machine 10. The electric circuit 11 may provide an ignition controller that performs ignition control. The electric circuit 11 provides a drive circuit that causes the rotating electrical machine 10 to function as an electric motor. The electrical circuit 11 receives from the rotating electrical machine 10 a rotational position signal for causing the rotating electrical machine 10 to function as an electric motor. The electrical circuit 11 causes the rotating electrical machine 10 to function as an electric motor by controlling energization to the rotating electrical machine 10 according to the detected rotational position. The electric circuit 11 causes the rotating electrical machine 10 to function as an electric motor that functions efficiently in the first rotation speed range (low speed range). Furthermore, the electric circuit 11 causes the rotating electrical machine 10 to function as an electric motor that functions efficiently in a second rotational speed range (high speed range) that is faster than the first rotational speed range.

  The rotating electrical machine 10 is assembled to the internal combustion engine 12. The internal combustion engine 12 includes a body 13 and a rotary shaft 14 that is rotatably supported by the body 13 and rotates in conjunction with the internal combustion engine 12. The rotating electrical machine 10 is assembled to the body 13 and the rotating shaft 14. The body 13 is a structure such as a crankcase or a transmission case of the internal combustion engine 12. The rotating shaft 14 is a crankshaft of the internal combustion engine 12 or a rotating shaft interlocking with the crankshaft. The rotating shaft 14 rotates when the internal combustion engine 12 is operated, and drives the rotating electrical machine 10 to function as a generator. The rotating shaft 14 is a rotating shaft that can start the internal combustion engine 12 by the rotation of the rotating electrical machine 10 when the rotating electrical machine 10 functions as an electric motor. The rotating shaft 14 is a rotating shaft that can assist (assist) the rotation of the internal combustion engine 12 by the rotation of the rotating electrical machine 10 when the rotating electrical machine 10 functions as an electric motor.

  The rotating electrical machine 10 includes a rotor 21, a stator 31, and a sensor unit 41. The rotor 21 is a field element. The stator 31 is an armature. The sensor unit 41 is a rotational position detector.

  The entire rotor 21 is cup-shaped. The rotor 21 is positioned with its open end facing the body 13. The rotor 21 is fixed to the end of the rotating shaft 14. The rotor 21 and the rotating shaft 14 are connected via a positioning mechanism in the rotational direction such as key fitting. The rotor 21 is fixed by being fastened to the rotary shaft 14 by a fixing bolt 25. The rotor 21 rotates together with the rotating shaft 14. The rotor 21 provides a field by a permanent magnet.

  The rotor 21 has a cup-shaped rotor core 22. The rotor core 22 is connected to the rotating shaft 14 of the internal combustion engine 12. The rotor core 22 has an inner cylinder fixed to the rotating shaft 14, an outer cylinder positioned on the radially outer side of the inner cylinder, and an annular bottom plate extending between the inner cylinder and the outer cylinder. The rotor core 22 provides a yoke for a permanent magnet described later. The rotor core 22 is made of a magnetic metal.

  The rotor 21 has a permanent magnet 23 disposed on the inner surface of the rotor core 22. The permanent magnet 23 is fixed inside the outer cylinder. The permanent magnet 23 has a plurality of segments. Each segment is partially cylindrical. The permanent magnet 23 provides a plurality of N poles and a plurality of S poles inside thereof. The permanent magnet 23 provides at least a field. The permanent magnet 23 provides six pairs of N poles and S poles, that is, a 12 pole field by 12 segments. The permanent magnet 23 also provides a partial special magnetic pole for providing a reference position signal for ignition control. The special magnetic pole is provided by a partial magnetic pole different from the magnetic pole arrangement for the field. The permanent magnet 23 is fixed with respect to the axial direction and the radial direction by a holding cup 24 arranged on the radially inner side. The holding cup 24 is made of a thin nonmagnetic metal. The holding cup 24 is fixed to the rotor core 22.

  The stator 31 is an annular member. The stator 31 is disposed between the rotor 21 and the body 13. The stator 31 has a through hole that can receive the rotating shaft 14 and the inner cylinder of the rotor core 22. The stator 31 has an outer peripheral surface that faces the inner surface of the rotor 21 via a gap. A plurality of magnetic poles are arranged on the outer peripheral surface. These magnetic poles are arranged opposite to the field of the rotor 21. The stator 31 has an armature winding. The stator 31 has multiphase armature windings. The stator 31 is fixed to the body 13. The stator 31 is a three-phase multipolar stator having a plurality of magnetic poles and a plurality of three-phase windings.

  The stator 31 has a stator core 32. The stator core 32 is disposed inside the rotor 21 by being fixed to the body 13 of the internal combustion engine 12. The stator core 32 forms a plurality of magnetic poles facing the permanent magnet 23 on the radially outer side. The stator core 32 is formed by laminating electromagnetic steel sheets formed in a predetermined shape so as to form a plurality of magnetic poles. The stator core 32 provides a plurality of magnetic poles facing the inner surface of the permanent magnet 23. A gap is provided between the plurality of magnetic poles of the stator core 32.

  The stator 31 has a stator coil 33 wound around a stator core 32. The stator coil 33 provides an armature winding. An insulator made of an insulating material is disposed between the stator core 32 and the stator coil 33. The stator coil 33 is a three-phase winding. The stator coil 33 can selectively function the rotor 21 and the stator 31 as a generator or an electric motor.

  The stator 31 is fixed to the body 13. The stator 31 and the body 13 are connected via a rotational positioning mechanism, for example, a fixing bolt 34. The stator 31 is fixed by being fastened to the body 13 by a plurality of fixing bolts 34.

  The sensor unit 41 is fixed to the stator 31. The sensor unit 41 is disposed between the stator core 32 and the body 13. The sensor unit 41 is fixed to one end surface of the stator core 32. The sensor unit 41 detects the rotational position of the rotor 21 by detecting the magnetic flux supplied by the permanent magnet 23 provided on the rotor 21. The sensor unit 41 has a plurality of rotational position sensors 43. The plurality of rotational position sensors 43 are disposed between the magnetic poles and detect the rotational position of the rotor 21 by detecting the magnetic flux of the permanent magnet 23. The plurality of rotational position sensors 43 are disposed away from each other in the circumferential direction with respect to the rotational axis of the rotor 21.

  The reference position for ignition control is indicated by the position of the special magnetic pole provided by the permanent magnet 23. The rotational position of the rotor 21 is also the rotational position of the rotating shaft 14. Therefore, a reference position signal for ignition control can be obtained by detecting the rotational position of the rotor 21.

  The rotational position of the rotor 21 is indicated by the position in the rotational direction of the field provided by the permanent magnet 23. Therefore, the rotating electrical machine 10 can function as an electric motor by detecting the rotational position of the rotor 21 and controlling the energization to the armature winding according to the detected rotational position. The rotational position sensor 43 detects the rotational position of the rotor 21 for causing the rotating electrical machine 10 to function as at least an electric motor. The rotating electrical machine 10 can function as a generator and an electric motor, and can selectively function as either of them.

  The sensor unit 41 accommodates the circuit component 42. The circuit component 42 includes a substrate, an electric element mounted on the substrate, and an electric wire. The sensor unit 41 accommodates the rotational position sensor 43. The sensor unit 41 has a case 51.

  The case 51 is made of a resin material. The case 51 can partially have a metal part. The case 51 accommodates and holds the circuit component 42 and the rotational position sensor 43. The rotational position sensor 43 is connected to the circuit component 42. The case 51 has a shape corresponding to a cross section of a polygonal cylinder, for example, a trapezoidal cylinder, and has an outer edge extending approximately corresponding to the radially outer edge of the stator 31. The case 51 has a container 52 for housing the circuit component 42. The container 52 is made of a resin material. The container 52 has a box shape in which a surface facing the body 13 is opened. The container 52 has a bottom surface facing the stator core 32 side, an opening facing the body 13, and a side wall surrounding the bottom surface and the opening. The circuit component 42 is accommodated in the container 52 and fixed.

  The case 51 has at least one cover 53 for accommodating and supporting at least one rotational position sensor 43. The rotational position sensor 43 is fixed in the cover 53. The cover 53 is a bottomed cylindrical member formed so as to extend from the bottom surface of the container 52. The cover 53 is provided on the radially outer side. The cover 53 is inserted into the gap between the magnetic poles. The cover 53 is integrally formed to be continuous from the container 52 with the same resin material as the container 52.

  The inside of the cover 53 communicates with the inside of the container 52. The sensor unit 41 has a plurality of covers 53. The cover 53 has a shape that can be called a finger shape or a tongue shape extending from the container 52. The cover 53 can also be called a sheath for the rotational position sensor 43. The plurality of covers 53 include one cover 53 for a rotational position sensor for detecting a reference position for ignition control and three covers 53 for rotational position sensors for motor control.

  One rotational position sensor 43 is accommodated in each cover 53. The rotational position sensor 43 detects the magnetic flux supplied from the permanent magnet 23. The rotational position sensor 43 is provided by a Hall sensor, an MRE sensor, or the like. This embodiment has one rotational position sensor for ignition control and three rotational position sensors for motor control. The rotational position sensor 43 is electrically connected to the circuit component 42 by a sensor terminal disposed in a cavity in the cover 53.

  Details relating to the permanent magnet 23 for ignition control and motor control in this embodiment and details relating to the plurality of rotational position sensors 43 are disclosed in Japanese Patent Nos. 5064279 and 2013-233030 listed as patent documents. The contents described in Japanese Patent Laid-Open No. 2013-27252 can be incorporated, and the same description can be cited by reference.

  The case 51 has a tightening portion 54. The tightening portion 54 is provided radially inward from the container 52 with respect to the radial direction of the rotating electrical machine 10. A connecting portion 55 is provided between the container 52 and the tightening portion 54 to connect them. The fastening portion 54 and the connecting portion 55 are integrally formed so as to be continuous from the container 52 by the same resin material as that of the container 52. The fixing bolt 44 is disposed through the stator core 32 from the surface of the stator core 32 opposite to the body 13. The front end portion of the fixing bolt 44 protruding from the stator core 32 is screwed into the female thread portion of the tightening portion 54. Thereby, the sensor unit 41 is fixed to the stator core 32.

  The inside of the container 52 is filled with a protective sealing resin 56. The sealing resin 56 is a potting resin for protecting the electric circuit. The sensor unit 41 has a lead wire 45 for external connection for taking out a signal output from the rotational position sensor 43 to the outside. The sensor unit 41 has a plurality of lead wires 45 for extracting signals from the plurality of rotational position sensors 43. The plurality of lead wires 45 are bundled between the sensor unit 41 and the electric circuit 11 to provide a wire bundle.

  The rotating electrical machine 10 includes a power line 46 that connects the stator coil 33 and the electric circuit 11. The power line 46 is connected to the stator coil 33. The electric power line 46 supplies the electric circuit 11 with electric power induced in the stator coil 33 when the rotating electrical machine 10 functions as a generator. The electric power line 46 supplies electric power for exciting the stator coil 33 from the electric circuit 11 to the stator coil 33 when the rotating electrical machine 10 functions as an electric motor. A part of the power line 46 is provided by a plurality of bus bars 71.

  FIG. 2 is a plan view of the stator 31. In the drawing, a plurality of coils C1 to C18 that provide the stator coil 33 are shown. The stator core 32 is an outer salient pole type iron core. The stator core 32 has 18 magnetic poles 32a. Coils C1-C18 are wound around these magnetic poles 32a. Coils C1-C18 provide multiphase windings. Among the plurality of coils that provide one phase, a plurality of coils that can be mechanically arranged at equiangular intervals on the stator 31 are used as the primary coil group 33p. The remaining coils are used as the secondary coil group 33s.

  In this embodiment, a three-phase winding is provided. Thus, one phase is provided by six coils. For example, the coils C1, C4, C7, C10, C13, and C16 arranged at equal intervals are in phase. These coils provide, for example, the U phase. Of these in-phase coils, coils C1, C7 and C13 which are mechanically positioned at equal intervals on the stator 31 are used as the primary coil group 33p. It can be said that the coils C1, C7, C13 are arranged point-symmetrically on the stator 31. This arrangement is also called an n / 360 deg arrangement, where n is the number of coils belonging to the primary coil group 33p. This arrangement enables suppression of magnetic sound when the primary coil group 33p is used.

  In this embodiment, the coils C1, C7, C13 are connected in parallel. The coils C1, C7, C13 may be connected in series. The remaining coils C4, C10, and C16 are used as the secondary coil group 33s. These coils C4, C10, C16 are connected in series. Also in the secondary coil group 33s, the plurality of coils can be connected in various series-parallel states. Similarly, a V phase and a W phase are provided.

  3 and 4 show the connection state of the stator coil 33. In the figure, the electric circuit 11 is shown in more detail. The electric circuit 11 includes a switching circuit (SWC) 11a. The electric circuit 11 includes an inverter circuit (INV) 11b. The electric circuit 11 includes a control device (CNT) 11c. The electric circuit 11 includes a battery (BTT) 11d.

  In the drawing, a plurality of coils C1-C18 included in the stator coil 33 are indicated by squares. One phase, for example, the U phase includes a primary coil group 33p and a secondary coil group 33s. The secondary coil group 33 s is star-connected at a neutral point 33 n disposed on the stator 31. Both the primary coil group 33p and the secondary coil group 33s are set so that the rotating electrical machine 10 can exhibit an output suitable for the starter motor of the internal combustion engine 12 when all of them are used. The primary coil group 33p and the secondary coil group 33s provide a first multiphase winding suitable for the first rotational speed range (low speed range) including the stopped state of the internal combustion engine 12. The primary coil group 33p can provide a second multiphase winding suitable for the second rotational speed range (high speed range) in which the internal combustion engine 12 is stably rotating by itself. The second rotation speed range is higher than the first rotation speed range.

  The switching circuit 11a switches the connection state of the plurality of coils C1-C18 in the stator coil 33. The switching circuit 11a uses a plurality of coils C1-C18 to provide a plurality of types of multiphase windings. The switching circuit 11a provides a plurality of types of multiphase windings by switching the number of coils arranged in parallel and / or the number of coils arranged in series. The switching circuit 11a provides a first multiphase winding for low speed and a second multiphase winding for high speed. The first multiphase winding has a larger number of turns in one phase than the second multiphase winding, and is suitable for a low rotation range. The second multiphase winding has fewer turns in one phase than the first multiphase winding, and is suitable for high-speed rotation. The switching circuit 11a provides a first multiphase winding and a second multiphase winding by using the primary coil group 33p and the secondary coil group 33s.

  FIG. 3 shows a first multiphase winding that provides a single phase by connecting a primary coil group 33p and a secondary coil group 33s in series. The first multiphase winding is a low-speed multiphase winding. The state shown in the figure is also called a first mode (MODE 1) or a low speed mode (LOW). The switching circuit 11a provides a series circuit SR that connects the primary coil group 33p and the secondary coil group 33s in series. The switching circuit 11a provides an output circuit PT that connects the end of the primary coil group 33p to the inverter circuit 11b.

  FIG. 4 shows a second multi-phase winding that provides one phase only with the primary coil group 33p. The second multiphase winding is a high-speed multiphase winding. The state shown is also called a second mode (MODE 2) or a high speed mode (HIGH). The switching circuit 11a provides a neutral point circuit PN that commonly connects one end portions of the plurality of primary coil groups 33p to form a neutral point connection. The switching circuit 11a provides an output circuit PT that connects the other end of the primary coil group 33p to the inverter circuit 11b.

  According to this configuration, all coils are equally spaced on the stator core 32 both when the first multiphase winding is provided and when the second multiphase winding is provided. . Thus, magnetic noise is suppressed in both operating states.

  The inverter circuit 11b provides a bidirectional power conversion circuit. The inverter circuit 11b provides power conversion for driving the rotary electric machine 10 as an electric motor or a generator. The inverter circuit 11b provides a rectification circuit, that is, an AC / DC conversion circuit, when the rotating electrical machine 10 is used as a generator. The inverter circuit 11b provides a DC / AC conversion circuit that supplies three-phase power to the stator coil 33 when the rotating electrical machine 10 is used as an electric motor. The inverter circuit 11b can be provided by a full bridge circuit composed of a plurality of semiconductor switch elements. The inverter circuit 11b may include a diode bridge circuit as a rectifier circuit.

  The control device 11c controls the switching circuit 11a and the inverter circuit 11b. The control device 11c controls the switching circuit 11a and the inverter circuit 11b so that the rotating electrical machine 10 is operated by switching between a generator and an electric motor.

  Further, the control device 11c controls the switching circuit 11a so as to adjust the inductance of the stator coil 33. The control device 11c controls the switching circuit 11a according to the rotational speed of the rotor 21 so that an inductance suitable for the rotational speed is provided. For example, when the rotating electrical machine 10 is operated as an electric motor, the control device 11c controls the switching circuit 11a so as to realize the first multiphase winding in the first rotation speed range. When the rotating electrical machine 10 is operated as an electric motor, the control device 11c realizes the second multiphase winding in the second rotational speed range where the rotational speed is higher than the first rotational speed range. The switching circuit 11a is controlled.

  The control device 11c is an electronic control device. The control device 11c has at least one arithmetic processing unit (CPU) and at least one memory device (MMR) as a storage medium for storing programs and data. The control device 11c is provided by a microcomputer including a computer-readable storage medium. The storage medium stores a computer-readable program non-temporarily. The storage medium can be provided by a semiconductor memory or a magnetic disk. The controller can be provided by a computer or a set of computer resources linked by a data communication device. The program is executed by the control device 11c to cause the control device 11c to function as a device described in this specification, and to cause the control device 11c to function so as to execute the method described in this specification. The control device 11c provides various elements. At least some of those elements can be referred to as means for performing the function, and in another aspect, at least some of those elements are blocks that are interpreted as a configuration, or modules that are interpreted as a configuration. Can be called.

  The means and / or function provided by the control device 11c can be provided by software recorded in a substantial memory device and a computer that executes the software, software only, hardware only, or a combination thereof. For example, when the control device 11c is provided by an electronic circuit which is hardware, it can be provided by a digital circuit including a large number of logic circuits or an analog circuit.

  The battery 11d is a secondary battery mounted on the vehicle. The battery 11d is charged with electric power supplied from the stator coil 33 when the rotating electrical machine 10 is used as a generator. The battery 11d supplies electric power to the stator coil 33 when the rotating electrical machine 10 is used as an electric motor.

  3 and 4, a plurality of bus bars 71 are provided between the stator coil 33 and the switching circuit 11a. In the drawing, the bus bar 71 is indicated by a thick solid line. In this embodiment, the series connection part between two or more coils connected in series within the same purpose coil group is provided by a coil wire 33j forming the coil. That is, the coil wire 33j is laid between the end of one coil and the end of the other one coil. For example, two of the three coils belonging to one phase of the secondary coil group 33s are connected in series by a coil wire 33j. As described above, at least a part between the plurality of coils C <b> 1 to C <b> 18 is connected by arranging the coil wire 33 j forming the coil so as to extend in the circumferential direction along the axial end surface of the stator core 32. The

  In FIG. 2, a coil wire 33j is illustrated. In the drawing, an example in which the coil C4 and the coil C16 are connected in series with the coil wire 33j as a crossover is shown. The crossover wire by the coil wire material 33j can be provided at various positions according to various conditions such as winding order and winding direction in the winding process.

  In this embodiment, the bus bar 71 is used for portions other than the series connection portion among the electrical connection portions on the stator 31. In this embodiment, a bus bar 71 is used for a parallel connection portion that connects three coils in parallel and a lead wire extending from the stator 31. The lead wire is provided by the bus bar 71 and a normal covered wire.

  FIG. 5 is a plan view of the stator 31. FIG. 6 shows a state where the sensor unit 41 is removed. 7 and 8 are perspective views of the stator 31. FIG. As shown in FIGS. 3 and 4, the plurality of bus bars 71 are arranged to provide electrical connection between the coils C <b> 1 to C <b> 18 and the switching circuit 11 a.

  The bus bar 71 is made of conductive metal. The bus bar 71 may include an insulating material that covers the metal portion. The bus bar 71 is covered with an insulating material after a metal having no coating is formed into a predetermined shape and joined. The insulating material can be applied to the metal surface by, for example, powder coating or dip treatment.

  The bus bar 71 is a member different from the coil wire material. The bus bar 71 is harder than the coil wire and is suitable for maintaining a predetermined shape. The bus bar 71 has a cross-sectional shape and / or a cross-sectional thickness different from that of the coil wire. The bus bar 71 has a cross-sectional shape suitable for stably maintaining a predetermined shape on the end surface of the stator 31 and a cross-sectional thickness. The illustrated bus bar 71 is a conductor having a rectangular cross section. One electrically conductive bus bar 71 can be provided by connecting a plurality of members electrically and mechanically. One bus bar 71 can be provided by joining a plurality of members by soldering or welding.

  The stator 31 has a plurality of bus bars 71. Each of the plurality of bus bars 71 has a circumferentially extending portion 72 and / or a radially extending portion 74. The plurality of circumferentially extending portions 72 are formed and arranged so as to extend in the circumferential direction along the end surface of the stator 31. The radially extending portion 74 is formed and arranged so as to extend radially outward along the end surface of the stator 31. The radially extending portion 74 can be disposed so as to extend slightly inclined with respect to the radial direction of the stator 31. The radially extending portion 74 may extend from the end face of the stator 31 so as to rise slightly in the axial direction. In the figure, six circumferentially extending portions 72 and nine radially extending portions 74 are shown. The tips of the plurality of radially extending portions 74 are connected to the covered wire and connected to the switching circuit 11a.

  The plurality of circumferentially extending portions 72 are arranged on the stator 31 so as to be aligned in the radial direction. The plurality of circumferentially extending portions 72 extend over the arc range. In the figure, six circumferentially extending portions 72 are shown. The plurality of circumferentially extending portions 72 are arranged concentrically on the end surface of the stator 31 so as not to overlap each other in the axial direction of the stator 31.

  The plurality of radially extending portions 74 are divided into a plurality of bus bar bundles 75 in order to meet various requirements such as restrictions on mounting on the body 13. In the illustrated example, three radially extending portions 74 form one bus bar bundle 75. In the illustrated example, three bus bar bundles 75 are formed.

  The plurality of radially extending portions 74 provide a plurality of lead lines for connecting the primary coil group 33p and the secondary coil group 33s to the external electric circuit 11. The six radially extending portions 74 are connected to the six circumferentially extending portions 72. A plurality of coil wire rods of a plurality of coils connected in parallel to each other are connected to the six circumferentially extending portions 72. Therefore, the circumferentially extending portion 72 is used to connect a plurality of coils in parallel. These six circumferentially extending portions 72 provide jumper wires for parallel connection in the primary coil group 33p. The remaining three radially extending portions 74 are directly connected to the coil wire. These three radially extending portions 74 provide lead lines for the secondary coil group 33s.

  The sensor unit 41 corresponds to the tip region of the magnetic pole 32a and is formed and arranged so as to occupy a fan-shaped sensor installation range 41a extending over the plurality of magnetic poles 32a. The sensor installation range 41 a is narrower than the axial projection range of the sensor unit 41. This is because the sensor unit 41 includes a connecting portion 55 for fixing itself. The connecting portion 55 is not included in the sensor installation range 41a. This is because a relatively large gap is formed between the stator 31 and the connecting portion 55 as shown in FIG. The bus bar 71 is arranged in a range excluding the sensor installation range 41a.

  The sensor unit 41 occupies a fan-shaped sensor installation range 41 a that is smaller than a half of the stator core 32 in the circumferential direction. The sensor unit 41 occupies approximately 1/4 of the sensor installation range 41 a in the circumferential direction of the stator core 32. The sensor installation range 41 a extends over a range corresponding to at least five magnetic poles 32 a in the circumferential direction of the stator core 32. The sensor installation range 41a includes at least four gaps with respect to the gap formed between the magnetic pole 32a and the magnetic pole 32a. Thereby, the sensor unit 41 arrange | positions the four rotational position sensors 43 in the regular position.

  5-8, the circumferential direction extension part 72 is arrange | positioned on the surface of the stator 31 so that interference with the sensor unit 41 may be avoided. The circumferentially extending portion 72 is disposed in an annular range corresponding to the magnetic pole 32 a on the axial end surface of the stator 31. In particular, as shown in FIGS. 7 and 8, the circumferentially extending portion 72 is laid along the surface of the stator coil 33 so as not to protrude from the stator 31 in the axial direction. In this embodiment, the sensor unit 41 is also laid along the surface of the stator coil 33. Therefore, the circumferentially extending portion 72 and the sensor unit 41 are arranged so as to overlap with respect to the circumferential direction and / or the radial direction of the stator 31. In other words, the circumferentially extending portion 72 and the sensor unit 41 are disposed within the same height range in the axial direction of the stator 31. More specifically, the circumferentially extending portion 72 and the container 52 are overlapped with respect to the circumferential direction. Thereby, the compact arrangement of the bus bar 71 and the sensor unit 41 is possible.

  The circumferentially extending portion 72 is not provided in the sensor installation range 41a. That is, the circumferentially extending portion 72 is arranged at a site other than the sensor installation range 41a, avoiding the sensor installation range 41a where the sensor unit 41 is arranged. The circumferentially extending portion 72 provides a bus bar 71 for a plurality of coils connected in parallel to each other in one phase.

  A part of the coil wire material 33j as a jumper wire connecting the coils also extends between the sensor unit 41 and the stator 31. However, the coil wire 33 j is disposed between the connecting portion 55 and the stator core 32, avoiding the container 52 portion of the sensor unit 41. Thereby, the sensor unit 41 can be arranged in a state of being approached on the stator 31. In addition, this arrangement enables the sensor unit 41 to be arranged in a narrow gap between the stator core 32 and the body 13. The plurality of coil wires 33 j are laid so as to extend in the circumferential direction through the vicinity of the base of the magnetic pole 32 a on the stator 31, avoiding the sensor installation range 41 a important for installing the rotational position sensor 43.

  FIG. 9 is a flowchart showing a control process S80 executed by the control device 11c. The control device 11 c provides a control block for using the rotating electrical machine 10 as a starter motor for the internal combustion engine 12. The control device 11c provides a control block for using the rotating electrical machine 10 as a generator. Further, the control device 11c provides a control block for providing an assist operation for applying torque to the internal combustion engine 12 in a normal rotation speed range in which the internal combustion engine 12 can continuously rotate.

  In step S81, the control device 11c inputs various sensor signals. The input signal can include a start instruction by the user. The input signal can include a position signal provided from the sensor unit 41. The input signal can include a rotational speed signal indicating the rotational speed of the internal combustion engine 12. The input signal can include a sensor signal indicating the operating state of the internal combustion engine 12, such as a throttle opening.

  In step S82, the control device 11c determines the operating state of the internal combustion engine 12 in order to determine the function of the rotating electrical machine 10. Based on the determination result in step S82, control device 11c determines the function of rotating electrical machine 10 in subsequent steps S83 and S84. In step S83, the control device 11c determines whether the rotating electrical machine 10 functions as a generator or whether the rotating electrical machine 10 functions as an electric motor. The control device 11c selects the motor operation when a start instruction is input from the user or when a request for assisting the internal combustion engine 12 is input. The control device 11c selects the generator operation in cases other than the above.

  If generator operation is selected in Step S83, control device 11c will perform processing of Steps S84 and S85. In step S84, the control device 11c controls the switching circuit 11a to connect the stator coil 33 to the multiphase winding for the generator. Here, the connection state illustrated in FIG. 3 is provided. In step S85, the control device 11c performs rectification control so that the inverter circuit 11b functions as a rectification circuit. Thereby, the AC power output from the stator coil 33 is rectified to DC power and supplied to the battery 11d. The process of steps S83-S85 provides a power generation control unit.

  When the motor operation is selected in step S83, the control device 11c executes the process of step S91. In step S91, the control device 11c determines whether it is a low speed operation or a high speed operation. This determination can be performed based on the rotational speed of the internal combustion engine 12. When the internal combustion engine 12 is in the stopped state or in the first rotational speed range corresponding to the cranking rotational speed, the control device 11c determines the low speed operation. When the internal combustion engine 12 is in the second rotational speed range that exceeds the idling rotational speed at which the internal combustion engine 12 can continuously rotate by combustion, the control device 11c determines the high speed operation.

  When the low speed operation is selected in step S91, the control device 11c executes steps S92 and S93. In step S92, the control device 11c controls the switching circuit 11a to provide the first multiphase winding. Thereby, the stator coil 33 provides a three-phase winding for low speed. In step S93, the control device 11c controls the inverter circuit 11b. Here, the control device 11 c controls the inverter circuit 11 b so that the rotating electrical machine 10 functions as a starter motor and starts the internal combustion engine 12.

  When the high speed operation is selected in step S91, the control device 11c executes steps S94 and S95. In step S94, the control device 11c controls the switching circuit 11a to provide the second multiphase winding. Thereby, the stator coil 33 provides a three-phase winding for high speed. In step S95, the control device 11c controls the inverter circuit 11b. Here, the control device 11 c controls the inverter circuit 11 b so that the rotating electrical machine 10 supports (assists) the rotation of the internal combustion engine 12. Here, the control device 11 c controls the assist amount by the rotating electrical machine 10 according to the switch operation by the user, the throttle operation by the user, or the operating state of the internal combustion engine 12. For example, the control device 11c controls the rotating electrical machine 10 to assist acceleration of the two-wheeled vehicle.

  The process of steps S91-S95 provides an electric motor control part. Step S91 provides a determination unit that determines the rotation speed range. Steps S92 and S93 provide an electric motor controller for the first rotational speed range. Steps S94 and S95 provide an electric motor controller for the second rotational speed range.

  In the embodiment described above, the first multiphase winding provided by the primary coil group 33p and the second multiphase winding provided by the secondary coil group 33s are provided. That is, the first multiphase winding and the second multiphase winding are arranged on one stator core 32. Therefore, a compact configuration can be provided. In addition, a plurality of radially extending portions 74 are provided as a plurality of lead lines for connecting the multiphase windings to the external electric circuit 11. Thereby, the external electric circuit 11 can provide various multi-phase windings using the first multi-phase winding and the second multi-phase winding.

  The electric circuit 11 can be switched to generator operation or motor operation. In addition, the electric circuit may be a mode that uses only the first multiphase winding, a mode that uses only the second multiphase winding, or both the first multiphase winding and the second multiphase winding. It is possible to switch at least two of the modes using the motor operation. Therefore, a multiphase winding suitable for the application can be used.

  The electric circuit 11 can switch between the first mode suitable for the first rotational speed range and the second mode suitable for the second rotational speed range higher than the first rotational speed range. For this reason, the multiphase winding suitable for the rotation speed region can be used.

  In the above embodiment, the number of turns of the multiphase winding used in the first mode is larger than the number of turns of the multiphase winding used in the second mode. The number of turns of the multiphase winding used in the first mode is the total number of turns of the plurality of coils forming the first group. The number of turns of the multiphase winding used in the second mode is the sum of the number of turns of a smaller number of coils than in the first group. The first mode is a mode that uses both the first multiphase winding and the second multiphase winding, and the second mode is a mode that uses only the first multiphase winding, or In this mode, only the second multiphase winding is used. In order to provide a desired number of turns, the first multiphase winding has a first number of turns and the second multiphase winding has a second number of turns greater than the first number of turns. Can do. The second mode is a mode that uses only the first multiphase winding. In this embodiment, by switching the number of turns, high torque and high efficiency can be obtained in each rotational speed region.

  In this embodiment, one of the first multiphase winding and the second multiphase winding is star-connected at a neutral point 33 n arranged on the stator 31. On the other hand, the electric circuit 11 has a neutral point circuit PN for star-connecting the other of the first multiphase winding and the second multiphase winding. This configuration also makes it possible to provide various multiphase windings.

  Further, in this embodiment, a plurality of bus bars 71, 72, and 74 that are arranged so as to extend in the circumferential direction along the axial end surface of the stator core and that at least partially connect the plurality of coils C1 to C18 are provided. Have. Thereby, the connection between coils can be provided by a bus bar. As a result, the connection between the coils can be made compact. In addition, the manufacturing process can be simplified.

(Second Embodiment)
This embodiment is a modification based on the preceding embodiment. In the above embodiment, the plurality of radially extending portions 74 are divided into three groups. Instead, in this embodiment, a plurality of radially extending portions 74 are bundled as a group and arranged to extend radially outward from the stator 31.

  As shown in FIGS. 10, 11, and 12, the plurality of radially extending portions 74 are bundled together to form a bus bar bundle 275. According to this embodiment, a plurality of leader lines necessary for coil switching can be intensively taken out. Such a configuration is suitable for a configuration in which the bus bar bundle 275 is connected to a single connector.

(Third embodiment)
This embodiment is a modification based on the preceding embodiment. In the above embodiment, the stator coil 33 is switched between the low speed type and the high speed type. Alternatively, a third multi-phase winding that can realize high torque and high efficiency in an intermediate speed range positioned between a low speed and a high speed may be provided.

  FIG. 13 shows an example of the connection state of the stator coil 33. In the figure, a third multi-phase winding that provides one phase only by the secondary coil group 33s is shown. The third multi-phase winding is a medium-speed multi-phase winding. The state shown in the figure is also called a third mode (MODE 3) or a medium speed mode (MID). The switching circuit 11a provides an output circuit ST that connects the end of the secondary coil group 33s to the inverter circuit 11b.

  In the third mode, the switching circuit 11a is driven so that only the secondary coil group 33s provides a three-phase star connection. Thereby, only the secondary coil group 33s is connected to the inverter circuit 11b. For example, in one phase (U phase), the coils C4, C10, and C16 as the secondary coil group 33s are connected to the inverter circuit 11b.

  The three-phase winding including only the illustrated secondary coil group 33s can be used in a medium speed range between the low speed range and the high speed range. The medium speed range may be set between the low speed range and the high speed range so as not to overlap with them. Part of the medium speed range may overlap with the low speed range. Further, a part of the medium speed range may overlap with the high speed range.

  According to this embodiment, the rotating electrical machine 10 can provide three-phase three-phase windings of low speed, medium speed, and high speed when used as an electric motor. The three-stage switching is provided by the control device 11c. Three-stage switching enables step-by-step assistance. In addition, the three-stage switching enables high torque and high efficiency in a wide rotational speed range.

(Fourth embodiment)
This embodiment is a modification based on the preceding embodiment. In the above embodiment, the primary coil group 33p is provided by connecting three coils in parallel. The secondary coil group 33s is provided by connecting three coils in series. Alternatively, the plurality of coils can be provided by various connections.

  FIG. 14 shows the primary coil group 33p and the secondary coil group 33s of this embodiment. FIG. 15 shows the arrangement of a plurality of coils C1-C18 in this embodiment. Also in this embodiment, a three-phase star-connected stator coil 433 is provided.

  The two coils C1 and C10 having the same phase are used as the primary coil group 33p. These coils C1 and C10 are connected in parallel. The coils C1 and C10 are mechanically symmetrically arranged. The coils C1 and C10 may be connected in series. The remaining coils C4, C7, C13, and C16 are used as the secondary coil group 33s. These coils C4, C7, C13, C16 are also arranged symmetrically. Two of the coils C4, C7, C13, and C16 are connected in series. The two series coil groups are connected in parallel to each other. As a result, the primary coil group 33p is provided by two coils. The secondary coil group 33s is provided by four coils. The number of coils in each group and / or the topology of each group, eg series or parallel, can be selected depending on the required characteristics.

  Also in this configuration, the coil wire 33j is used as a jumper wire in a portion where a plurality of coils are connected in series. In addition, a bus bar 71 is used for at least a part of a portion where a plurality of coils are connected in parallel. Also in this embodiment, the bus bar 71 is arranged so as to avoid the sensor installation range 41a.

(Fifth embodiment)
This embodiment is a modification based on the preceding embodiment. In the said embodiment, the some bus bar 71 is arrange | positioned so that the whole can be visually recognized. In this embodiment, a bus bar unit 81 that accommodates a plurality of bus bars is employed.

  16 and 17, the stator 31 includes a bus bar unit 81 on the end face on the body 13 side. The bus bar unit 81 mainly provides a part of the power line 46. The bus bar unit 81 is fixed to the stator core 32. The bus bar unit 81 is disposed between the stator 31 and the body 13. The bus bar unit 81 is formed so that it can be handled as one component. In the following description, an assembly of the stator core 32 and the stator coil 33 that does not include the bus bar unit 81 may be referred to as the stator 31. The bus bar unit 81 can also be regarded as a part of the stator coil 33.

  The bus bar unit 81 can be assembled separately from the stator 31. After assembling the bus bar unit 81, the fixed parts of the rotating electrical machine 10 are assembled by combining with the stator 31. Note that the bus bar unit 81 may be assembled on the stator 31. The bus bar unit 81 includes a plurality of bus bars 571. The bus bar unit 81 provides a part of the power line 46. The bus bar unit 81 provides an electrical connection between the plurality of coil leads 33a drawn on the stator 31 and the wire harness. The bus bar unit 81 can also be referred to as a bus bar unit or a stator upper wiring unit.

  The bus bar unit 81 has a resin container 82 which is an insulating material. The storage container 82 stores a plurality of bus bars 571, which will be described later, and fixes the plurality of bus bars 571 at predetermined positions. The container 82 has a connector portion 83. The connector portion 83 provides a detachable electrical connection between the plurality of bus bars 571 and the wire harness in the power line 46. At least one of the plurality of bus bars 571 includes a connector terminal portion 577 disposed in the connector portion 83. The connector part 83 provides, for example, nine connection parts in FIG. In the drawing, the end portion of the bus bar 571 is exposed as a connector terminal portion 577 for the connector portion 83 in the connector portion 83. Connector terminal portion 577 provides a male terminal for the connector. The connector 83 can be connected to a female coupler provided at the end of the wire harness extending from the electric circuit 11.

  The bus bar unit 81 has a pull-in portion 84 for pulling the plurality of coil leads 33 a of the stator coil 33 into the bus bar unit 81. The bus bar unit 81 has a plurality of lead-in portions 84. The plurality of lead-in portions 84 are distributed and arranged on both sides of the bus bar unit 81 on the radially outer side and the radially inner side. The plurality of lead-in portions 84 are provided away from each other along the circumferential direction. The structure of the lead-in part 84 will be described in detail with the following figures.

  The bus bar unit 81 has a meshing portion 85 for meshing the bus bar unit 81 with the stator 31. The meshing portion 85 provides meshing between the stator core 32 and the bus bar unit 81 by being inserted between the plurality of magnetic poles 32a. The position of the bus bar unit 81 and the stator core 32 in the circumferential direction is defined by the meshing portion 85. The meshing portion 85 extends from the bus bar unit 81 toward the plurality of magnetic poles 32a. The meshing portion 85 has a shape similar to that of the cover 53. The bus bar unit 81 can include a plurality of meshing portions 85. In this embodiment, two engagement portions 85 are provided at the base of the connector portion 83. The plurality of meshing portions 85 are provided apart from each other in the circumferential direction of the stator 31. The meshing portion 85 is provided at a position where the coil lead 33a is not disposed. The meshing portion 85 suppresses an undesirable movement of the bus bar unit 81. When a connection operation and a separation operation are performed in the connector portion 83, a force that pushes, pulls, and shakes the connector portion 83 acts on the connector portion 83. The meshing portion 85 provided at the base of the connector portion 83 suppresses the movement of the connector portion 83 with respect to the stator core 32.

  18 and 19, the bus bar unit 81 extends on the stator 31 over a C-shaped range. The bus bar unit 81 extends over a range excluding the range where the sensor unit 41 is disposed. The bus bar unit 81 is formed so as to cover an annular range in the stator 31 where the stator coil 33 is disposed. The container 82 is disposed along an annular range where the magnetic pole 32a is disposed. The storage container 82 extends at least in an arc shape.

  The bus bar unit 81 has a fixing portion 86 for fixing the bus bar unit 81 to the stator core 32. The fixing portion 86 extends radially inward from the bus bar unit 81. The fixed portion 86 reaches the end surface of the stator core 32. The fixing portion 86 is formed integrally with the storage container 82. The fixing portion 86 is fastened to the stator core 32 by bolts. When the fixing portion 86 is fastened to the stator core 32, the bus bar unit 81 is firmly fixed to the stator core 32. The bus bar unit 81 can include a plurality of fixing portions 86. The plurality of fixing portions 86 are arranged away from each other in the circumferential direction. When interference with other components on the stator 31 is avoided, the plurality of fixing portions 86 are arranged evenly distributed on the bus bar unit 81. When the interference is avoided, the plurality of fixing portions 86 are arranged so as to be located on both sides of the connector portion 83 in the circumferential direction.

  20 and 21, the inside of the bus bar unit 81 is shown. A plurality of bus bars 571 are housed in the housing container 82. The storage container 82 includes a case 87 as a first portion located on the stator 31 side and a cover 88 as a second portion combined with the case 87. The case 87 has a shape that can be called a shallow saucer. The cover 88 also has a shape that can be called a shallow saucer. The case 87 and the cover 88 substantially bisect the container 82 in the height direction (the axial direction of the stator 31). Thereby, in the state where the cover 88 is removed, since the upper half of the stored item is exposed, the internal work is facilitated. The height of the storage container 82 and the height of the connector portion 83 are substantially equal. The cover 88 has a plate-like portion that covers a part of the connector portion 83 and a half-container portion that is combined with the case 87. The cover 88 improves electrical insulation between the plurality of bus bars 571 and the body 13. The case 87 and the cover 88 are connected by a plurality of connecting portions 89. The connecting portion 89 can be provided by a detachable snap fit mechanism. Case 87 has an end plate at the bottom in the figure and a side plate extending so as to surround the periphery of the end plate. The cover 88 includes an end plate on the top side in the drawing and a side plate extending so as to surround the periphery of the end plate.

  The plurality of bus bars 571 are mainly attached to the case 87. The case 87 has a plurality of support portions 91 and 92 for supporting the plurality of bus bars 571. The plurality of support portions 91 and 92 mainly include a first support portion 91 for mainly supporting the circumferentially extending portion and a second support portion 92 for mainly supporting the radially extending portion. The support portions 91 and 92 hold the bus bar 571 by receiving the bus bar 571 and provide a slit for further fixing.

  One support portion 91 is provided on an end plate of the case 87 and receives a part of the bus bar 571 so as to sandwich a part thereof in the radial direction. In order to support one bus bar 571, one support portion 91 or a plurality of support portions 91 forming one set is provided. The pair of support portions 91 are disposed in the case 87 apart from each other in the circumferential direction. The support portion 92 is provided by a comb-like member. The support portion 92 is more specifically shown by subsequent drawings. The plurality of support portions 91 and 92 are arranged so as to separate the most surface of the bus bar 571 from the case 87 and the cover 88. Thereby, the drainage property when water intrudes into the storage container 82 is improved.

  The bus bar 571 has a connection portion 576 for connecting to a coil lead 33a that is an end portion of the stator coil 33. One bus bar 571 has at least one connection portion 576. Connection portion 576 is formed to receive the end of coil lead 33a. In the illustrated example, the connection portion 576 is formed as a clip portion by bending the end portion of the bus bar 571. The connecting portion 576 is mechanically and electrically connected to the coil lead 33a by sandwiching the coil lead 33a. Furthermore, the connecting portion 576 and the coil lead 33a are connected by metal bonding such as welding, electric resistance welding, soldering, or brazing. In this embodiment, many bus bars 571 have a plurality of, for example, two connection portions 576 in order to connect the stator coils 33 in parallel.

  The lead-in part 84 is formed in the case 87. The lead-in part 84 is not formed in the cover 88. The lead-in part 84 is a notch-shaped opening formed at the corner of the case 87. The connecting portion 576 is positioned on the retracting portion 84. Thereby, the coil lead 33a drawn into the drawing-in portion 84 can reach the connecting portion 576. The connection portion 576 is formed so as to protrude further from the opening end of the case 87. Thereby, the work in the connecting portion 576 is not hindered by the case 87. Further, since the cover 88 is covered, the connection portion 576 can be protected.

  22 and 23 show the relationship between the bus bar unit 81 and the plurality of coil leads 33a. The plurality of coil leads 33 a are provided at positions corresponding to the plurality of lead-in portions 84. The plurality of coil leads 33a are dispersively disposed on the radially outer side and the radially inner side of the annular region in which the stator coil 33 is disposed.

  22 and 23 show the disassembled state of the connector portion 83. The connector portion 83 is positioned so as to cover the radially outer portion of the axial end surface of the stator 31. This arrangement contributes to suppressing the protruding amount of the connector portion 83 in the radial direction. The connector part 83 has a base part 83a and a coupler part 83b. The base 83 a is integrally formed of a resin material as a part of the case 87. The coupler part 83b has a separator structure for regularly arranging terminals and a connecting mechanism as a connector. The base portion 83a is configured to be connectable to the coupler portion 83b. In the illustrated example, the base portion 83a provides a cylindrical portion that can receive the coupler portion 83b. The cylindrical portion is a quadrangular cylindrical shape. A plurality of connector terminal portions 577 are regularly arranged in the connector portion 83. The plurality of connector terminal portions 577 are end portions of the plurality of bus bars 571.

  24 and 25 show a state where the sensor unit 41 is removed. The plurality of coil leads 33a are provided in an angle range in which the bus bar unit 81 is disposed. The plurality of coil leads 33 a are distributed in a range excluding a portion covered by the connector portion 83. A plurality of coil leads 33 a are arranged in an angular range on the stator 31 in the radial direction from the connector portion 83. The connector portion 83 is disposed so as to extend radially outward from the stator 31. The coil lead 33a is not provided in an angular range in which the connector portion 83 extends outside the stator 31 in the radial direction. The plurality of coil leads 33a are not provided in the angle range where the sensor unit 41 is disposed. The plurality of coil leads 33a are arranged so as to extend from the coils necessary for providing the connection of the multiphase winding described in the preceding embodiment.

  FIG. 26 shows the bus bar unit 81 with the cover 88 removed. In the drawing, a bolt 86a for fastening the fixing portion 86 is shown. The insertion direction of the bolt 86a is the same as the insertion direction of the fixing bolt 44 in order to fix the sensor unit 41. The bolt is inserted from the opposite side of the stator core 32 and screwed into a nut portion provided in the fixing portion 86. A plurality of bus bars 571 are accommodated in the bus bar unit 81 in a state of being electrically insulated from each other. The bus bar 571 is disposed so as to pass through the connector portion 83 along the radial direction. Bus bar 571 is arranged in case 87 so as to extend along the circumferential direction of stator 31. Furthermore, in order to disperse and arrange the plurality of connection portions 576 on the radially outer side and the radially inner side, the bus bar 571 extends slightly toward the radially outer side or the radially inner side at their end portions. The bus bar 571 is supported by the support portion 91. Further, the bus bar 571 is supported by the support portion 92 in the connector portion 83.

  As shown in the figure, the storage container 82, that is, the case 87 has a plurality of lead-in portions 84 on both the radially inner side and the radially outer side of the stator core 32. The plurality of lead-in portions 84 are used for drawing the coil lead 33 a extending from the coil disposed around the magnetic pole 32 a into the housing container 82 in order to connect to the bus bar 571. The connecting portion 576 is disposed in the corresponding retracting portion 84. The plurality of connecting portions 576 are arranged on concentric circles on the radially outer side and the radially inner side of the stator 31. Therefore, the processing machine can be sequentially positioned with respect to the plurality of connection portions 576 by relatively rotating and moving the bus bar unit 81 and the processing machine, for example, a fusing machine.

  FIG. 27 shows a part of the case 87 around the connector portion 83. The lead-in portion 84 is provided by a slit opening 84a and a groove 84b. The slit opening 84a is formed so as to cross the side wall throughout the height direction of the side wall. Therefore, the slit opening 84 a is also opened at the opening end of the case 87. The slit opening 84a has a sufficiently larger width than the coil lead 33a so that the coil lead 33a can pass therethrough. The slit opening 84a can also be referred to as a side wall opening or a side surface opening. The groove 84b extends in the radial direction from the outer edge of the end plate. The radially outer lead-in portion 84 has a groove extending radially inward from the outer edge of the end plate. The radially inner lead-in portion 84 has a groove extending radially outward from the inner edge of the end plate. The groove 84b opens widely at the outer edge or the inner edge, and becomes narrower toward the back. This shape contributes to guide the coil lead 33a. The groove 84b has a pocket shape extending in the circumferential direction at the back. Groove 84b has a shape that can be referred to as an L-shape as a whole. The pocket shape contributes to guide the coil lead 33a to a desired position. The groove 84b can be referred to as a notch or a radial slot.

  For example, the lead-in portion 84 illustrated on the left shoulder of FIG. 27 has a slit opening 84a formed in the outer side wall. The groove 84b extends radially inward from the outer edge. The groove 84b has an inlet portion that gradually narrows from the radially outer side toward the radially inner side, and a pocket portion that extends in the circumferential direction from the radially inner end of the inlet portion. The pocket portion extends in the counterclockwise direction. Thus, the pocket portion is open in the clockwise direction.

  Returning to FIG. 26, the connecting portion 576 is formed and disposed so as to be located on the groove 84 b. The clip portion in the connection portion 576 is open in the radial direction. Moreover, the clip portion is open toward one side in the circumferential direction. The shape of the clip portion corresponds to the pocket portion of the groove 84b. That is, the pocket portion is also open in the radial direction, and the pocket portion is also open in one circumferential direction.

  For example, the connecting portion 576 illustrated on the left shoulder in FIG. 26 is located on the retracting portion 84. The clip part of the connection part 576 is J-shaped. The clip part is open radially outward and is opened clockwise in the circumferential direction.

  When the coil lead 33a is introduced from the entrance of the groove 84b toward the back, the movement of the coil lead 33a when the coil lead 33a is introduced into the pocket portion guides the end of the coil lead 33a into the clip portion. To do. The lead-in part 84 can receive the coil lead 33a along the radial direction through the slit opening 84a. The lead-in portion 84 can receive the coil lead 33a along the axial direction through the groove 84b.

  In FIG. 26, a plurality of lead-in portions 84 having the same opening direction of the pocket portions are arranged along the circumferential direction. In other words, a plurality of connection portions 576 having the same opening direction of the clip portion are arranged along the circumferential direction. For example, on the radially outer side of the right half in the drawing, the pocket portions of the plurality of retracting portions 84 and the clip portions of the connecting portions 576 are all open in the counterclockwise direction. On the radially outer side of the left half in the drawing, the pocket portions of the plurality of retracting portions 84 and the clip portions of the connecting portions 576 are all open in the clockwise direction. On the inner side in the radial direction of the right half in the drawing, the pocket portions of the plurality of retracting portions 84 and the clip portions of the connecting portions 576 are all open in the counterclockwise direction. On the radially inner side of the left half in the drawing, the pocket portions of the plurality of retracting portions 84 and the clip portions of the connecting portions 576 are all open in the clockwise direction.

  Such a configuration in which the opening directions of the pocket portions of the plurality of adjacent drawing-in portions 84 are the same contributes to the efficiency of work for introducing the coil lead 33a. The configuration in which the opening directions of the clip portions of the plurality of adjacent connection portions 576 are the same contributes to the efficiency of the work of introducing and connecting the coil lead 33a. For example, the processing machine can be positioned with respect to the plurality of connecting portions 576 by relatively rotating and moving the bus bar unit 81 and the processing machine, for example, a fusing machine. Further, the position and pressure direction of the processing machine that deforms the clip portion of the connection portion 576 can be the same for the plurality of connection portions 576. In addition, simultaneous machining in which a plurality of connection portions 576 are simultaneously connected can be easily employed.

  In FIG. 26, the bus bar 571 will be described in detail by taking one bus bar 571 indicated by the reference numeral 571 as a representative example. Further, FIG. 28 to FIG. 31 show the bus bar 571. FIG. 28 is a plan view of the bus bar 571 viewed in the same direction as FIG. FIG. 29 is a front view of the bus bar 571 as viewed from the tip of the connector portion 83. 30 and 31 are perspective views of the bus bar 571. FIG.

  The bus bar 571 is an elongated quadrilateral whose cross section perpendicular to the extending direction has a longitudinal direction and a lateral direction. The bus bar 571 can be called a ribbon-like conductor or a plate-like conductor. The bus bar 571 is manufactured by processing a metal plate. The bus bar 571 is formed into a predetermined shape by cutting a plate material into a predetermined shape and pressing and / or bending. The bus bar 571 has a circumferentially extending portion 572 and a radially extending portion 574. The circumferentially extending portion 572 and the radially extending portion 574 are integrally formed of a continuous metal material.

  The circumferentially extending portion 572 is arranged in a vertical posture in which the cross-sectional longitudinal direction of the cross section perpendicular to the extending direction extends along the axial direction of the stator 31. Such a cross-sectional arrangement of the bus bars 571 can be referred to as a vertical arrangement. The vertical arrangement enables the plurality of bus bars 571 to be arranged compactly in the radial direction while being electrically insulated. In this embodiment, a plurality of circumferentially extending portions 572 are arranged in the radial direction in the case 87. The vertical arrangement makes it possible to suppress the size in the radial direction.

  The radially extending portion 574 has a twisted portion 578 at an intermediate portion thereof. In the twisted portion 578, the radially extending portion 574 is twisted by 90 degrees. A connector terminal portion 577 is provided between the twist portion 578 and the end portion.

  The connector terminal portion 577 is arranged in a lateral posture in which the cross-sectional longitudinal direction of the cross section perpendicular to the extending direction intersects the axial direction of the stator 31. Such a cross-sectional arrangement of the bus bar 571 can be referred to as a horizontal posture. The horizontal posture arrangement enables a plurality of bus bars 571 to be arranged compactly in the axial direction while being electrically insulated. In this embodiment, connector terminal portions 577 are arranged in multiple layers in the axial direction in the connector portion 83. The arrangement of the horizontal posture makes it possible to suppress the size of the connector portion 83 in the axial direction. The radially extending portion 574 has a portion disposed in a vertical posture between the circumferentially extending portion 572 and the twisted portion 578.

  The twist portion 578 is disposed so as to contact the support portion 92. Returning to FIG. 27, the support portion 92 has a comb-tooth portion 92a. The comb tooth portion 92a is provided by a plurality of triangular prisms. The plurality of triangular prisms are arranged with their bottom surfaces directed radially inward of the stator 31. The plurality of triangular prisms are arranged so as to define a triangular gap 92b between them. The gap 92b gradually narrows from the radially outer side toward the inner side. In other words, the gap 92b becomes narrower from the tip of the connector portion 83 toward the back. The gap 92b has a shape that can receive the twisted portion 578. By accommodating the twisted portion 578 in the gap 92b, the connector terminal portion 577 is prevented from being pushed in even when the connector terminal portion 577 receives a force pushing in the length direction. Therefore, the support portion 92 and the twist portion 578 provide a restraining portion for restraining the connector terminal portion 577.

  The triangular prism that provides the comb-tooth portion 92a has a height that can accommodate the two bus bars 571 in the gap 92b. Thereby, the upper and lower two-stage connector terminal portions 577 can be arranged. An insulating member is disposed between the two bus bars 571 accommodated in the same gap 92b. The arrangement of the multi-stage connector terminal portion 577 in the connector portion 83 makes it possible to arrange a plurality of nine terminals in a compact manner.

  As illustrated in the preceding drawings, the bus bars 571 are arranged in multiple layers in the case 87 with respect to the axial direction of the stator 31. For example, in the representative bus bar 571, the circumferentially extending portion 572 is disposed in the lower layer. The radially extending portion 574 and the connecting portions 576 and 576 are disposed in the upper layer. One bus bar 571 has an upper layer arrangement portion and a lower layer arrangement portion. One bus bar 571 has a longitudinally extending portion 579 extending between upper and lower layers in order to connect the upper layer arrangement portion and the lower layer arrangement portion. A representative bus bar 571 is provided with a plurality of longitudinally extending portions 579.

  Returning to FIG. 26, the container 82 includes a bus bar 593 for providing a neutral point 33n that is permanently connected. In this embodiment, the neutral point 33n is also provided via the bus bar 593. Connection of all the coil leads 33a on the stator 31 is provided by connection to the bus bars 571 and 593. The connection for the neutral point 33n is provided by a bus bar 593 that is shorter than the bus bar 571 for external connection. The case 87 is provided with a lead-in portion 84 for pulling in the coil lead 33a for the neutral point 33n.

  FIG. 32 shows the arrangement of the stator coils 33 in this embodiment. In the drawing, an example of the positions of the three coil leads 33a for providing the neutral point 33n is indicated by a black circle. Three coil leads 33a for providing a neutral point are arranged on three adjacent coils. Moreover, the three coil leads 33a are arranged on the same side in the radial direction. In the illustrated example, the three coil leads 33a are arranged on the radially inner side. The stator coil 33 is wound starting from the three coil leads 33a. The stator coil 33 is wound by so-called right-hand winding. For example, one phase winding Vs of the secondary coil group 33s starts to be wound from a coil lead 33a to which a symbol is attached. When the secondary coil group 33 s includes three coils, the winding process proceeds in a clockwise manner continuously over the three coils. Each of the three coils belonging to the primary coil group 33p is wound clockwise.

  The manufacturing method of the rotating electrical machine 10 includes a process of assembling the stator 31 and a process of assembling the bus bar unit 81. These steps are performed simultaneously or before and after. In the assembly process for the stator 31, the stator 31 is assembled as shown in FIGS. Here, the stator 31 is assembled in which the plurality of coil leads 33a are arranged so as to extend in the axial direction from a prescribed position. For subsequent steps, the radially outer coil lead 33a may be disposed so as to be slightly inclined outward. Further, the radially inner coil lead 33a may be disposed so as to be slightly inclined inward.

  In the process for the bus bar unit 81, first, a plurality of bus bars 571 are mounted in the case 87. The bus bar 571 is inserted into the support portions 91 and 92 while positioning the connector terminal portion 577 in the base portion 83a. The plurality of connecting portions 576 are positioned on the corresponding drawing-in portions 84.

  In the process of assembling the stator 31 and the bus bar unit 81, first, the case 87 is attached to the stator 31 and fixed by the fixing portion 86. At the same time or subsequently, the coil lead 33 a is pulled into the pull-in portion 84. At this time, some of the coil leads 33a are drawn into the drawing portion 84 along the axial direction via the grooves provided in the end plate. Some of the coil leads 33a are drawn into the drawing portion 84 along the radial direction via slit openings provided in the side plates. The coil lead 33a is guided along the pocket portion of the groove 84b and at the same time positioned in the clip portion of the connection portion 576.

  Next, the connection process of the connection part 576 and the coil lead 33a in the some connection part 576 is implemented. In the connection step, the clip portion of the connection portion 576 is bent so as to sandwich the coil lead 33a. Next, the connection part 576 and the coil lead 33a are welded. Thereafter, a cover 88 is mounted on the case 87.

  According to this embodiment, the following effects can be obtained. A plurality of bus bars 571 are protected by the container 82. The plurality of connection portions 576 are protected by the storage container 82. A plurality of bus bars 571 are stably supported. Since the container 82 is engaged with the stator 31 by the engagement portion 85, the bus bar unit 81 is stably fixed. For example, the movement of the bus bar unit 81 due to the attaching / detaching operation in the connector portion 83 is suppressed. Since the container 82 is fixed to the stator 31 by the fixing portion 86, the bus bar unit 81 is stably fixed. Since three coil leads 33a for the neutral point 33n are provided in the adjacent three coils and arranged radially inward, the bus bar 593 shorter than the bus bar 571 for external connection is used for the neutral point 33n. A connection is provided.

  The pull-in portion 84 supports the pull-in operation of the coil lead 33a. Since the direction of the groove 84b of the lead-in part 84 and the clip part of the connecting part 576 are aligned, the lead-in work of the coil lead 33a is easy. Since the connection portion 576 is disposed so as to protrude above the lower layer where many bus bars 571 are disposed, a wide working space in the connection portion 576 is provided. Since the connection portion 576 is disposed so as to protrude above the case 87, the connection work between the bus bar 571 and the coil lead 33a is easy. Work is facilitated by the drawing-in part 84 and the connection part 576, and an increase in work man-hours is suppressed even if the storage container 82 is provided.

  Since a part of the bus bar 571 is used as the connector terminal portion 577, the connection between the bus bar 571 and the wire harness can be directly provided. Moreover, the increase in the number of parts is suppressed. Therefore, the rotary electric machine 10 is provided at low cost. Since the base 83a formed integrally with the case 87 provides a cylindrical portion surrounding the plurality of connector terminal portions 577, high strength as a connector is realized. In the connector part 83, since the several connector terminal part 577 is laterally arrange | positioned, the connector part 83 by which the height regarding the axial direction of the stator 31 was suppressed is provided. Since the bus bar 571 has a twisted portion 578 used as a restraining portion, movement of the connector terminal portion 577 used as a connector is suppressed.

(Sixth embodiment)
This embodiment is a modification based on the preceding embodiment. In the above embodiment, the bus bar unit 81 is fixed only to the stator 31. In this embodiment, the bus bar unit 81 has a fixing portion 94 for fixing to the body 13.

  33 and 34 show a case 687 for the bus bar unit 81 of this embodiment. FIG. 35 is a plan view corresponding to FIG. The case 687 has a base portion 83 a for the connector portion 83. Fixed portions 94 are provided on both sides of the base portion 83a. The fixed portion 94 is formed so as to come into contact with the body 13 when the rotating electrical machine 10 is mounted on the internal combustion engine 12. The fixing portion 94 has a through hole for receiving a bolt. The fixed portion 94 is fixed to the body 13 with a bolt. Thereby, the bus bar unit 81 can be firmly fixed to the body 13.

  The bus bar unit 81 can be engaged only at a predetermined position of the stator 31. Therefore, the fixed portion 94 provides a function of defining the position of the stator 31 in the rotational direction with respect to the body 13 as an additional function. In this case, the sensor unit 41 may or may not have a fixing portion for fixing to the body 13. The case 687 may include only one fixed portion 94.

  In the drawing, the shape of the support portion 92 is shown in detail. The support portion 92 is the same as in the preceding embodiment. In the drawing, the shape of the lead-in portion 84 is also shown in detail. The lead-in part 84 is the same as the preceding embodiment. These figures can be referred to as descriptions of corresponding elements in the preceding embodiments.

(Seventh embodiment)
This embodiment is a modification based on the preceding embodiment. In the above embodiment, the connector portion 83 has the base portion 83a that is formed into a cylindrical shape from a resin material. Instead, the base 83a may be formed by a plurality of parts.

  FIGS. 36-39 show a case 787 for the bus bar unit 81 of this embodiment. FIG. 36 is a perspective view of the case 787. FIG. 37 is a front view of the case 787 as seen from the tip of the connector portion. 38 and 39 are exploded views corresponding to FIGS. 36 and 37. FIG.

  The case 787 has a base portion 783 a for the connector portion 83. Also in this embodiment, the base portion 783a is cylindrical in order to connect with the coupler portion 83b. The base 783a has a lower half cylinder 83c in the drawing and an upper half cylinder 83d in the drawing. The half cylinder 83c is formed of a resin material integrally with the main body of the case 787. The half cylinder 83d is a separate body from the half cylinder 83c. The half cylinder 83d can be mounted so as to cover the opening side surface of the half cylinder 83c. A connection mechanism for connecting the half cylinder 83c and the half cylinder 83d is provided between the half cylinder 83c and the half cylinder 83d. In the illustrated example, a snap fit mechanism is employed as the coupling mechanism. In the drawing, an engaging claw 83e for a snap-fit mechanism is shown.

(Eighth embodiment)
This embodiment is a modification based on the preceding embodiment. In the above embodiment, the plurality of bus bars 71 and the sensor unit 41 are arranged on the stator 31 as separate parts. Instead, a plurality of bus bars 71 and 571 may be integrated with the sensor unit 41. For example, a plurality of bus bars 71 and 571 may be connected by the resin material of the sensor unit 41. From another viewpoint, the components of the sensor unit 41 are accommodated in the accommodating container 82.

  As shown in FIG. 40, the bus bar unit 81 and the sensor unit 41 may be covered with a continuous resin material. In this case, the bus bar unit 81 and the sensor unit 41 are provided as a container 95 that is an integrally formed part for an annular rotating electrical machine. The container 95 is also called the sensor unit 41 or the bus bar unit 81. The container 95 is made of resin. The storage container 95 provides the case 51, the sealing resin 56, and the storage container 82.

  Since the region necessary for the rotational position sensor 43 is a region outside the stator 31 in the radial direction, the sensor installation range 41 a necessary for installing the rotational position sensor 43 is the radially outer side of the container 95. It is good also as only the area | region of. In the drawing, an example of the sensor installation range 41a is indicated by a broken line. In this case, the bus bar 571 for the power line 46 and the sensor installation range 41a may be overlapped in the radial direction. In the drawing, an example of such a bus bar 571 is shown by a broken line.

  In this configuration, a signal line for a signal from the rotational position sensor 43 may also be provided by the bus bar. In this case, it is desirable that the bus bar 571 for the power line 46 and the signal line bus bar are arranged apart from each other. For example, it is desirable to dispose the connector portion 83 as an outlet of the bus bar 571 for the power line 46 and the connector 41b as an outlet of the signal line bus bar by a predetermined distance.

(Ninth embodiment)
This embodiment is a modification based on the preceding embodiment. In the preceding embodiment, the stator coil 33 is star-connected. Instead of this, the stator coil 33 may be delta-connected.

  FIG. 41 shows the arrangement of the stator coils 33 in the stator 31 of this embodiment. The stator coil 33 is a three-phase winding including a U phase, a V phase, and a W phase. Stator coil 33 includes a plurality of coils U1-U6, V1-V6, and W1-W6. In the following description, the three-phase connection is described using the reference numerals of these coils.

  FIG. 42 shows the stator coil 33 and the switching circuit 11a that are connected in multiple phases. The stator coil 33 is ring-connected, that is, delta-connected. Also in this embodiment, one phase has a primary coil group 33p and a secondary coil group 33s. Primary coil group 33p includes two coils connected in parallel. The secondary coil group 33s has two series groups including two coils connected in series. The secondary coil group 33s has two series groups connected in parallel.

  In this embodiment, two modes are provided. One mode is provided by only the primary coil group 33p being delta-connected. The other mode is provided by both the primary coil group 33p and the secondary coil group 33s being connected in series in each phase and further delta-connected. The switching circuit 11a includes a circuit that opens or short-circuits both ends of the secondary coil group 33s. The switching circuit 11a can be provided by a switch circuit such as a relay. The switching circuit 11a switches between the two modes by opening and closing the switch circuit.

  FIG. 43 shows a modification of this embodiment. Primary coil group 33p includes three coils connected in parallel. The secondary coil group 33s includes three coils connected in series. As a result, the number of turns provided by the primary coil group 33p is less than the number of turns provided by the secondary coil group 33s.

  FIG. 44 shows another modification of this embodiment. In this modification, two different phase coils are mixedly arranged between two output terminals. The number of coils in one phase is greater than the number of coils in the other phase. For example, a single W-phase coil W1 is mixed between the output terminal PT1 and the output terminal PT2, which are supposed to have only a U-phase coil. Coils U2-U6 can be called majority coils, and coil W1 can be called minority coils. A similar mix is provided between all terminals of the delta connection.

  The primary coil group 33p is energized and used in all modes. The secondary coil group 33s is energized and used in a mode that requires a large number of turns. The minority coil is included only in the secondary coil group 33s. Minority coils are not used when a small number of turns is required. On the other hand, the minority coil is used when a large number of turns is required.

  When the rotating electrical machine 10 is used as a generator, the switching circuit 11a opens a switch circuit. As a result, all the coils between the terminals are used. At this time, a current also flows through the minority coil. The minority coil suppresses an excessive increase in power generation output and suppresses an excessive increase in driving torque for driving the rotating electrical machine 10.

  When the rotating electrical machine 10 is used as an electric motor or when the rotating electrical machine 10 is used as an electric motor in a high-speed rotation range, the switching circuit 11a closes the switch circuit. As a result, only the primary coil group 33p is used. The minority coil is not included in the primary coil group 33p. Therefore, a small number of turns is provided only by the majority coil. The minority coil is one of the factors that reduce the output torque of the electric motor. According to this modification, a connection that does not include the minority coil is provided. Therefore, the malfunction resulting from a minority coil is suppressed. Note that when the rotating electrical machine 10 is used as an electric motor in the low-speed rotation region, the switching circuit 11a may open the switch circuit. In this case, the minority coil contributes to adjusting the balance between the drive torque when used as a generator and the output torque when used as an electric motor.

  For the configuration including a minority coil and the energization control when used as an electric motor, refer to the description of Japanese Patent No. 5602890 exemplified as Patent Document 6 introduced by reference as a technical description of this specification. Can do.

(10th Embodiment)
This embodiment is a modification based on the preceding embodiment. 45 to 50 show the stator 31 and the bus bar unit 81 of the rotating electrical machine 10 of this embodiment. In this embodiment as well, portions corresponding to those of the preceding embodiment are denoted by the same reference numerals, and the description of the preceding embodiment is incorporated.

  45, 46, 47, and 48 show changes in the bus bar unit 81 in the manufacturing method. The bus bar unit 81 includes a storage container 82 that stores a plurality of bus bars 571. The storage container 82 includes a dish-like case 87 disposed on the stator 31 side and a cover 88 that cooperates with the case 87 to form a cavity.

  A seal member 83 f is attached to the connector portion 83. The seal member 83f is provided by rubber grommets or packing. The seal member 83 f is disposed between the connector portion 83 and the body 13. The seal member 83f suppresses intrusion of water or the like through the gap between the connector portion 83 and the body 13, or leakage of oil or the like from the storage chamber that houses the rotating electrical machine 10 to the outside. The seal member 83f suppresses vibration transmission.

  The case 87 has a plurality of engaging protrusions 87a. The cover 88 has a plurality of connecting portions 89. The connecting portion 89 is provided by a hook portion that engages with the engaging protrusion 87a. The engaging protrusion 87a and the connecting portion 89 provide a snap fit mechanism. The snap fit mechanism shifts from the separated state to the engaged state using the elastic deformation of the resin in the connecting portion 89. Further, the snap-fit mechanism maintains the engaged state by utilizing the elastic deformation of the resin at the connecting portion 89. The engaging protrusion 87a and the connecting portion 89 may be replaced with each other. A plurality of snap-fit mechanisms are provided between the case 87 and the cover 88. The connecting portion 89 and the engaging protrusion 87a provide a plurality of connecting mechanisms. The plurality of coupling mechanisms are distributed around the storage container 82. In the example shown in the figure, they are arranged on both sides of the connector portion 83 and on the two tip portions of the C-shaped container 82.

  The cover 88 has an opening A1. The opening A1 extends over the entire area of the storage container 82. The opening A1 opens so as to extend along the longitudinal direction of the container 82, that is, in the illustrated example, the circumferential direction. The opening A1 makes it possible to spread the sealing resin A2 over the entire storage container 82 in the step of pouring the sealing resin A2 described later.

  46 and 49, the case 87 has a connecting portion A3 that connects the case 87 and the stator 31. The connecting part A3 has a hook part A4. The stator 31 has an engaging protrusion A5 that engages with the connecting portion A3. The engagement protrusion A5 is formed in the insulator 36. The insulator 36 is made of an electrically insulating resin. The insulator 36 is disposed between the stator core 32 and the stator coil 33. The insulator 36 provides a so-called bobbin. The engagement protrusion A5 is formed on the flange portion of the bobbin. The connecting portion A3 and the engaging protrusion A5 provide a snap fit mechanism. A plurality of snap fit mechanisms are provided between the case 87 and the stator 31. The connecting portion A3 and the engaging protrusion A5 directly connect the stator 31 and the bus bar unit 81. The connecting portion A3 and the engaging protrusion A5 provide a plurality of connecting mechanisms. The plurality of coupling mechanisms are distributed around the storage container 82. In the example shown in the figure, they are arranged at the two leading ends of the C-shaped container 82.

  As shown in FIGS. 45 to 49, the connecting portion A3 is covered with a protector A6. The protector A6 protects the connecting portion A3. Protector A6 suppresses exposure of connecting part A3. The protector A6 suppresses deformation of the connecting portion A3. By the protector A6, separation between the connecting portion A3 and the engaging protrusion A5 is suppressed.

  FIG. 48 shows a completed product of the stator 31 and the bus bar unit 81. A cured sealing resin A <b> 2 is disposed in the storage container 82. The sealing resin A2 is poured into the housing container 82 from the opening A1 in a flowable state, and is cured. The sealing resin A2 is stored in the storage container 82. The sealing resin A2 is filled in the container 82. The sealing resin A2 covers the opening A1. The sealing resin A2 completely covers the bus bar 571. The plurality of bus bars 571 are fixed in the storage container 82 by the sealing resin A2 poured into the storage container 82.

  50 is an enlarged view of a portion indicated by an arrow L in FIG. The meshing portion 85 extending from the bus bar unit 81 is disposed between two magnetic poles 32a adjacent in the circumferential direction. The meshing portion 85 is inserted between the two magnetic poles 32a along the axial direction. The meshing portion 85 has an inner portion 85 a that is positioned on the radially inner side of the magnetic pole 32 a with respect to the radial direction of the stator 31. The meshing portion 85 has an outer portion 85 b that is positioned on the radially outer side of the magnetic pole 32 a with respect to the radial direction of the stator 31. The meshing portion 85 has meshing in the radial direction between the stator 31 and the bus bar unit 81 by having an inner portion 85a and an outer portion 85b. As a result, the bus bar unit 81 is positioned at a specified position with respect to the stator 31.

  Returning to FIG. 45, a deformable elastic member A <b> 7 is provided between the stator core 32 and the fixed portion 86. The elastic member A7 is a rubber ring. The elastic member A7 is an elastically deformable member. The elastic member A7 is more flexible than the stator core 32. The elastic member A7 is more flexible than the tightening portion in the fixing portion 86. The elastic member A <b> 7 provides an elastic deformation portion provided between the stator core 32 and the bus bar unit 81. According to this configuration, the bus bar unit 81 is softly fixed to the stator 31.

  The elastic member A7 absorbs a dimensional error between the case 87 and the stator 31. Further, the elastic member A7 suppresses transmission of vibration between the case 87 and the stator core 32. The elastic member A7 suppresses the vibration of the bus bar 571 supported in the storage container 82. Similarly, transmission of vibration between the stator core 32 and the container 82 and further between the stator core 32 and the connector portion 83 is suppressed. Thereby, the transmission of the vibration to the terminal in the connector part 83 and a terminal contact part is suppressed.

  The manufacturing method of the rotating electrical machine 10 includes a case mounting process. In the case mounting process, a case 87 and a plurality of bus bars 571 are mounted on the stator 31. In this step, the assembly including the case 87 and the plurality of bus bars 571 is mounted on the stator 31 after the plurality of bus bars 571 are arranged at a predetermined position on the case 87. A plurality of bus bars 571 may be disposed after attaching case 87 to stator 31.

  In this step, the case 87 is mounted along the axial direction from one end side of the stator 31 in the axial direction toward the stator 31. In this step, the meshing portion 85 provided in the case 87 is meshed with the stator 31. The case 87 is positioned with respect to the stator 31 in the radial direction and the circumferential direction by the meshing portion 85. In this step, the connecting portion A3 provided on the case 87 is connected to the engaging protrusion A5 provided on the stator 31. The connection mechanism provided by the connection portion A3 and the engagement protrusion A5 positions the case 87 and the stator 31 with respect to the axial direction, the radial direction, and the circumferential direction. The coupling mechanism couples the case 87 and the stator 31 so that they are not separated by simply separating them along the axial direction.

  The manufacturing method of the rotary electric machine 10 includes a terminal connection process. In the terminal connection step, the plurality of bus bars 571 are electrically connected to corresponding members. For example, the plurality of bus bars 571 are connected to the corresponding coil leads 33a.

  The method for manufacturing the rotating electrical machine 10 includes a cover mounting step. In the cover mounting step, the cover 88 is mounted on the case 87 so as to accommodate the plurality of bus bars 571. The cover 88 is mounted along the axial direction from one end side of the stator 31 in the axial direction toward the case 87. In this step, the connecting portion 89 is connected to the engaging protrusion 87a. A connecting mechanism that connects the case 87 and the cover 88 positions the case 87 and the cover 88 with respect to the axial direction, the radial direction, and the circumferential direction. The coupling mechanism couples the case 87 and the cover 88 so that they are not separated only by pulling them apart along the axial direction. In this step, the protector A6 is positioned so as to cover the connecting portion A3.

  The manufacturing method of the rotary electric machine 10 includes a sealing step. In the sealing step, the flowable sealing resin A2 is poured into the container 82. The sealing resin A2 is poured from the opening A1 to the entire area inside the storage container 82. Sealing resin A2 is poured so that the inside of the container 82 may be filled. In the sealing step, the sealing resin A2 is cured. As a result, the poured sealing resin A2 is held in the storage container 82.

According to this embodiment, the bus bar unit 81 is protected by the sealing resin A2. For example, the intrusion of water and the invasion of foreign matter are suppressed. As a result, corrosion of parts in the bus bar unit 81, for example, the bus bar 571, is suppressed. Further, water intrusion into the connector 83 and entry of foreign matter is suppressed.
This disclosure includes a plurality of technical ideas.
(Technical Thought 1) A rotor (21) in which a permanent magnet (23) for providing a field is arranged on the inner surface of a rotor core (22) connected to a rotating shaft of the internal combustion engine (12), and an internal combustion engine (12 The stator core (32) which is disposed inside the rotor by being fixed to the body (13) and which forms a plurality of magnetic poles (32a) facing the permanent magnet on the radially outer side, and a stator coil mounted on the stator core The first multiphase winding (33p), the second multiphase winding (33s) in phase with the first multiphase winding, and the respective multiphase windings are connected to an external electric circuit. And a stator coil (33, 433) having a plurality of lead wires (46, 71, 571).
(Technical idea 2) An electric circuit that is connected to the stator coil via a lead wire and can be switched to generator operation or motor operation, and uses only the first multiphase winding, An electric circuit (11) capable of switching in motor operation at least two of a mode using only a phase winding or a mode using both a first multiphase winding and a second multiphase winding The rotating electrical machine for an internal combustion engine according to the technical idea 1, comprising:
(Technical idea 3) The two modes in which the electric circuit can be switched are the first mode suitable for the first rotational speed range and the second mode suitable for the second rotational speed range higher than the first rotational speed range. The rotating electrical machine for an internal combustion engine according to the technical idea 2, characterized by comprising two modes.
(Technical idea 4) Technical idea 3 is characterized in that the number of turns of the multiphase winding used in the first mode is larger than the number of turns of the multiphase winding used in the second mode. The rotary electric machine for internal combustion engines described.
(Technical Thought 5) The first mode is a mode that uses both the first multiphase winding and the second multiphase winding,
The second mode is a mode that uses only the first multi-phase winding or a mode that uses only the second multi-phase winding. Electric.
(Technical Thought 6) The first multiphase winding (33p) has the first number of turns,
The second multiphase winding (33s) has a second number of turns greater than the first number of turns,
The rotary electric machine for an internal combustion engine according to any one of the technical ideas 3 to 5, wherein the second mode is a mode in which only the first multiphase winding is used.
(Technical thought 7) One of the first multiphase winding (33p) and the second multiphase winding (33s) is star-connected at the neutral point (33n),
The electrical circuit has a neutral point circuit (PN) that connects the other of the first multiphase winding (33p) and the second multiphase winding (33s) in a star shape. Technical idea 1 To a rotating electrical machine for an internal combustion engine according to any one of the technical ideas 6.
(Technical Thought 8) At least a part of the plurality of lead lines includes a bus bar (71, 571) arranged so as to extend in the circumferential direction along the axial end surface of the stator core. The rotary electric machine for internal combustion engines in any one of the technical idea 1 to the technical idea 7.
(Technical Thought 9) A rotor (21) in which a permanent magnet (23) for providing a field is disposed on the inner surface of a rotor core (22) connected to the rotation shaft of the internal combustion engine (12);
A stator core (32) which is arranged on the inner side of the rotor by being fixed to the body (13) of the internal combustion engine (12) and which forms a plurality of magnetic poles (32a) facing the permanent magnet on the radially outer side;
A stator coil mounted on the stator core, the plurality of coils (C1-C18) mounted on the plurality of magnetic poles, and arranged to extend in the circumferential direction along the axial end surface of the stator core. And a stator coil (33, 433) having a plurality of bus bars (71, 571) that at least partially connect the two.
(Technical idea 10) At least a part between the plurality of coils is connected by arranging the coil wire (33j) forming the coil so as to extend in the circumferential direction along the axial end surface of the stator core. The rotating electrical machine for an internal combustion engine according to the technical idea 9, characterized in that
(Technical Thought 11) The plurality of bus bars are arranged so as to be aligned in the radial direction on the axial end surface of the stator core. Rotating electric machine.
(Technical Thought 12) The plurality of bus bars include circumferentially extending portions (72, 572) extending along the circumferential direction of the stator core, and radially extending portions (74, 574) extending outward in the radial direction of the stator core. The rotating electrical machine for an internal combustion engine according to any one of the technical ideas 8 to 11 characterized by comprising:
(Technical Thought 13) The rotating electrical machine for an internal combustion engine according to Technical Idea 12, wherein the circumferentially extending portion and the radially extending portion are integrally formed of a continuous metal material.
(Technical idea 14) The rotating electrical machine for an internal combustion engine according to any one of the technical idea 8 to the technical idea 13, characterized in that it includes a storage container (82, 95) for storing a plurality of bus bars.
(Technical Thought 15) The container includes an engagement portion (85) inserted between a plurality of magnetic poles, a fixing portion (86, A3) fixed to the stator core, and a fixing portion (94) fixed to the body. The rotating electrical machine for an internal combustion engine according to the technical idea 14, comprising at least one.
(Technical thought 16) The container has a connector part (83) for providing electrical connection,
The rotating electrical machine for an internal combustion engine according to the technical idea 14 or the technical idea 15, wherein at least one of the plurality of bus bars includes a connector terminal portion (577) disposed in the connector portion.
(Technical Thought 17) The bus bar is an elongated quadrilateral whose cross section perpendicular to the extending direction has a longitudinal direction and a short direction,
In the connector terminal portion, the cross-sectional longitudinal direction is arranged in a lateral posture intersecting the axial direction of the stator core,
17. The rotating electrical machine for an internal combustion engine according to the technical idea 16, wherein a portion extending along the circumferential direction of the stator core is arranged in a vertical posture in which the longitudinal direction of the cross section extends along the axial direction of the stator core.
(Technical Thought 18) The container is disposed along an annular range in which the magnetic pole is disposed, and is used to connect the coil lead (33a) extending from the coil disposed around the magnetic pole to the bus bar. The rotation for an internal combustion engine according to any one of the technical idea 14 to the technical idea 17, characterized in that a plurality of drawing parts (84) to be drawn into the inside are provided on both the radially inner side and the radially outer side of the stator core. Electric.
(Technical Thought 19) Further, the technical idea 1 to the technique including a rotational position sensor (43) disposed between the magnetic poles and detecting the rotational position of the rotor by detecting the magnetic flux of the permanent magnet. A rotary electric machine for an internal combustion engine according to any one of the technical ideas 18.
(Technical Thought 20) Further, a rotational position sensor (43) that is disposed between the magnetic poles and detects the rotational position of the rotor by detecting the magnetic flux of the permanent magnet is provided.
The rotational position sensor corresponds to the tip region of the magnetic pole, and is disposed so as to occupy at least the sensor installation range (41a) across the plurality of magnetic poles.
The rotating electrical machine for an internal combustion engine according to any one of the technical ideas 8 to 18, wherein the plurality of bus bars are arranged in a range excluding a sensor installation range.
(Technical Thought 21) The bus bar is fixed in the container by the resin (A2) poured into the container (81). A rotating electrical machine for an internal combustion engine according to claim 1.
(Technical idea 22) The container is made of resin, and the fixing portion (A3) fixed to the stator core is fixed to the stator core by a snap-fit mechanism that maintains the engaged state using the elasticity of the resin. The rotating electrical machine for an internal combustion engine according to the technical idea 15, characterized in that.
(Technical Thought 23) The meshing portion has an inner portion (85a) positioned on the radially inner side of the magnetic pole and an outer portion (85b) positioned on the radially outer side of the magnetic pole with respect to the radial direction of the stator core. The rotating electrical machine for an internal combustion engine according to the technical idea 15 described above.

(Other embodiments)
The invention disclosed herein can be implemented with various modifications without being limited to the illustrated embodiments. The disclosed invention is not limited to the combinations shown in the embodiments, and can be implemented in various combinations. Embodiments can have additional parts. The portion of the embodiment may be omitted. The parts of the embodiments can be replaced or combined with the parts of the other embodiments. The structure, operation, and effect of the embodiment are merely examples. The technical scope of the disclosed invention is not limited to the description of the embodiments. Some technical scope of the disclosed invention is indicated by the description of the claims, and should be understood to include all modifications within the meaning and scope equivalent to the description of the claims. It is.

  In the above embodiment, a three-phase winding having a star connection or a delta connection is provided as the multiphase winding. Instead, various multiphase windings can be employed. For example, a 5-phase winding may be adopted.

  In the first embodiment, the number of coils in each group is equal. In the fourth embodiment, the number of coils belonging to the primary coil group 33p is smaller than the number of coils belonging to the secondary coil group 33s. Instead of this, other combinations can be adopted for the number of coils included in each group depending on required performance and the like. For example, the number of coils belonging to the primary coil group 33p may be made larger than the number of coils belonging to the secondary coil group 33s. For example, a configuration in which the primary coil group 33p has four coils and the secondary coil group 33s has two coils can be employed. The minimum unit of the number of coils in each group may be two, three, or the like that can be arranged on the stator core 32 at equal intervals.

  In the above embodiment, two-stage winding switching consisting of low speed and high speed or three-stage winding switching consisting of low speed, medium speed, and high speed is provided. Alternatively, two-stage winding switching consisting of low speed and medium speed, or two-stage winding switching consisting of medium speed and high speed may be provided.

  In the said embodiment, when the rotary electric machine 10 is utilized as a generator, both the primary coil group 33p and the secondary coil group 33s are utilized. Instead, only one of the primary coil group 33p or the secondary coil group 33s may be used.

  In the said embodiment, the part which connects two coils in series was called the series connection part, and this series connection part was provided with the coil wire. In addition, a lead wire extending from the parallel connection portion and the stator 31 is provided by the bus bar 71. Alternatively, at least a part of the parallel connection part and / or at least a part of the lead wire may be provided by the coil wire. In the above embodiment, both the circumferentially extending portion 72 and the radially extending portion 74 are provided by the bus bar 71. Alternatively, only the circumferentially extending portion 72 may be provided by the bus bar 71, and the radially extending portion 74 may be provided by a covered electric wire.

  In the above embodiment, the circumferentially extending portion 72 is laid on the end surface of the stator 31. Instead, only a part of the circumferentially extending portion 72 may be provided by the bus bar 71 and the remaining portion may be provided by a coil wire or the like. Even in such a configuration, high shape stability by the bus bar 71 can be obtained in some of the circumferentially extending portions 72.

  In the above embodiment, a member having a cross-sectional shape and / or a cross-sectional thickness different from the coil wire material is used as the bus bar 71. Instead of this, a coil wire may be used as the bus bar 71.

  In the above-described embodiment, the restraint portion is provided by the twist portion 578. Instead of this, the restraint portion may be provided by a bent portion provided on the bus bar 571, a cut-and-raised portion obtained by cutting and raising a part of the bus bar 571, or a notch obtained by cutting a part of the bus bar 571. Further, the restraining portion may restrain the bus bar 571 in both the longitudinal directions of the radially extending portion. For example, a 90-degree twist portion and a 180-degree twist portion are provided, and they are disposed between the comb teeth portions arranged to face each other, so that restraints in both directions can be provided.

  In the above embodiment, the plurality of bus bars 571 are arranged in the cavity in the storage container 82. Instead, a resin material that at least partially covers the plurality of bus bars 571 may be provided in the case 87. For example, resin may be poured between the plurality of bus bars 571 and the case 87 and cured. Further, a plurality of bus bars 571 may be insert-molded in the case 87. The plurality of bus bars 571 embedded in the case 87 can also be interpreted as being stored in the storage container 82. In this case, the plurality of bus bars 571 are disposed so as to be exposed at least at the connector terminal portion 577 and the connection portion 576. Also in this configuration, the cover 88 can be used to cover the plurality of connecting portions 576.

  In the first to fourth embodiments, the neutral point 33 n that is permanently connected is disposed on the stator core 32. Alternatively, the neutral point 33n may be provided by the bus bar 593.

  One bus bar 71, 571 may be formed as a one-piece product with a continuous metal material, or may be formed by joining a plurality of metal components. For example, the bus bar 571 is formed as a one-piece product. Instead of this, for example, the circumferentially extending portion 572 and the radially extending portion 574 may be manufactured as separate parts and mechanically and electrically connected by a connection technique such as resistance welding. Further, only a part of the plurality of bus bars 71 and 571 may be provided as a one-piece product, and the remaining part may be provided as a multi-piece product.

  The storage containers 82 and 95 can be configured to include at least one of the meshing portion 85, the fixing portion 86, and the fixing portion 94. For example, the storage containers 82 and 95 may be configured to include a meshing portion 85 and a fixed portion 94. Further, the storage containers 82 and 95 may be configured to include a fixing portion 86 and a fixing portion 94.

  FIG. 26 illustrates an example in which the directions of the right half clip portion and the left half clip portion are different. Alternatively, all the clip portions may be directed in the same direction so that adjacent clip portions have a shape directed in the same direction. Further, the plurality of inner clip portions may be oriented in the first direction, and the plurality of outer clip portions may be oriented in the second direction different from the first direction.

  In the above embodiment, the rotating electrical machine 10 is applied to the internal combustion engine 12 for a motorcycle. The rotating electrical machine 10 disclosed herein can be used for internal combustion engines for various purposes. For example, the rotating electrical machine 10 can be used for internal combustion engines such as generators, pumps, agricultural machines, automobiles, and air conditioners. Moreover, in the said embodiment, the assistance in a 2nd rotation speed area is utilized for acceleration of a vehicle. Instead, the assist in the second rotational speed range reduces torque caused by the transmission in order to suppress an abnormal decrease in the rotational speed of the internal combustion engine in order to suppress instability of combustion in the internal combustion engine. It can be used for various purposes such as to suppress.

  In the above embodiment, the elastic deformation portion is provided by the elastic member A7. Instead of this, the fixing portion 86 may be directly fixed to the stator core 32. Further, the elastic support portion may be provided by a coil spring, a spring-like portion formed on a part of the fixed portion 86, or a spring-like portion formed on the insulator 36.

DESCRIPTION OF SYMBOLS 10 Rotating electrical machine for internal combustion engines, 11 Electrical circuit, 12 Internal combustion engine, 13 Body,
14 Rotating shaft, 21 Rotor, 22 Rotor core, 23 Permanent magnet,
24 holding cup, 25 fixing bolt, 31 stator, 32 stator core,
32a magnetic pole, 33, 433 stator coil, 34 fixing bolt,
41 sensor unit, 41a sensor installation range, 42 circuit parts,
43 Rotation position sensor, 44 Fixing bolt, 45 Lead wire, 46 Power line,
51 Case, 52 Container, 53 Cover, 54 Fastening part,
55 connecting part, 56 sealing resin,
33p primary coil group, 33s secondary coil group,
33j coil wire, 33n neutral point, 33a coil lead,
71 busbar, 72 circumferentially extending portion, 74 radial extending portion,
75, 275 bus bar bundle, 11a switching circuit, 11b inverter circuit,
11c control device, 11d battery,
PT, ST output circuit, SR series circuit, PN neutral point circuit,
81 busbar unit, 82 container, 83 connector part, 83a base part,
83b coupler part, 83f sealing member, 84 retracting part, 85 meshing part,
86 fixing part, 87 case, 87a engaging protrusion, 88 cover, 89 connecting part,
571 bus bar, 572 circumferentially extending portion, 574 radial extending portion,
576 connection part, 577 connector terminal part, 578 twist part,
91 support part, 92 support part, 92a comb tooth part, 92b gap,
593 bus bar, 687 case, 94 fixing part, 783a base part,
83c under base, 83d upper base, 83e engaging portion,
95 container, A1 opening, A2 sealing resin,
A3 fixing part, A4 protector, A5 engagement window, A6 engagement protrusion.

Claims (26)

A rotor (21) in which a permanent magnet (23) for providing a field is disposed on an inner surface of a rotor core (22) connected to a rotating shaft of the internal combustion engine (12);
A stator core (32) which is arranged on the inner side of the rotor by being fixed to the body (13) of the internal combustion engine (12) and which forms a plurality of magnetic poles (32a) facing the permanent magnet on the radially outer side;
A stator coil mounted on the stator core, the first multiphase winding (33p), the second multiphase winding (33s) in phase with the first multiphase winding, and the respective multiphases A stator coil (33, 433) having a plurality of lead wires (46, 71, 571) for connecting the winding to an external electric circuit;
The stator coil includes a plurality of coils, and one coil is wound around one magnetic pole,
The first multiphase winding and the second multiphase winding are provided by a plurality of the coils,
The first multiphase winding is a part of the plurality of coils having the same phase, and is mechanically located at equal intervals on the stator including the stator core and the stator coil, and is arranged point-symmetrically. A plurality of the coils connected in parallel to each other;
The rotary electric machine for an internal combustion engine, wherein the second multiphase winding is the remaining coil among the plurality of coils having the same phase .   An electric circuit that is connected to the stator coil via the lead wire and can be switched between a generator operation and an electric motor operation, the mode using only the first multi-phase winding; the second multi-phase winding; An electric circuit (11) capable of switching at least two modes of a mode using only a wire or a mode using both the first multiphase winding and the second multiphase winding in the motor operation. The rotary electric machine for internal combustion engines according to claim 1, further comprising:   The two modes that can be switched by the electric circuit are a first mode suitable for a first rotational speed range and a second mode suitable for a second rotational speed range higher than the first rotational speed range. The rotating electrical machine for an internal combustion engine according to claim 2, comprising:   4. The internal combustion engine according to claim 3, wherein the number of turns of the multiphase winding used in the first mode is larger than the number of turns of the multiphase winding used in the second mode. Rotating electric machine. The first mode is a mode using both the first multiphase winding and the second multiphase winding,
5. The internal combustion engine according to claim 4, wherein the second mode is a mode that uses only the first multiphase winding or a mode that uses only the second multiphase winding. 6. Rotating electric machine. The first multiphase winding (33p) has a first number of turns;
The second multiphase winding (33s) has a second number of turns greater than the first number of turns,
The rotary electric machine for an internal combustion engine according to any one of claims 3 to 5, wherein the second mode is a mode in which only the first multiphase winding is used. One of the first multiphase winding (33p) and the second multiphase winding (33s) is star-connected at a neutral point (33n),
The electrical circuit includes a neutral point circuit (PN) that star-connects the other of the first multiphase winding (33p) and the second multiphase winding (33s). The rotating electrical machine for an internal combustion engine according to any one of claims 1 to 6.   2. The bus bar (71, 571) arranged so as to extend in the circumferential direction along an end face in the axial direction of the stator core. Item 8. The rotating electrical machine for an internal combustion engine according to any one of Items 7 to 9. A rotor (21) in which a permanent magnet (23) for providing a field is disposed on an inner surface of a rotor core (22) connected to a rotating shaft of the internal combustion engine (12);
A stator core (32) which is arranged on the inner side of the rotor by being fixed to the body (13) of the internal combustion engine (12) and which forms a plurality of magnetic poles (32a) facing the permanent magnet on the radially outer side;
A stator coil mounted on the stator core, the plurality of coils (C1-C18) mounted on the plurality of magnetic poles, and disposed so as to extend in the circumferential direction along an axial end surface of the stator core; A stator coil (33, 433) having a plurality of bus bars (71, 571) connecting at least partially between the plurality of coils ;
A storage container (82, 95) for storing a plurality of the bus bars;
The storage container includes at least one of a meshing portion (85) inserted between the plurality of magnetic poles, a fixing portion (86, A3) fixed to the stator core, and a fixing portion (94) fixed to the body. A rotating electrical machine for an internal combustion engine, comprising: The container is made of resin, and the fixing portion (A3) fixed to the stator core is fixed to the stator core by a snap-fit mechanism that maintains an engaged state using elasticity of resin. The rotating electrical machine for an internal combustion engine according to claim 9 , wherein the rotating electrical machine is an internal combustion engine. The meshing portion has an inner portion (85a) positioned on the radially inner side of the magnetic pole and an outer portion (85b) positioned on the radially outer side of the magnetic pole with respect to the radial direction of the stator core. The rotating electrical machine for an internal combustion engine according to claim 9 . The container has a connector part (83) for providing an electrical connection,
The rotating electrical machine for an internal combustion engine according to claim 9 , wherein at least one of the plurality of bus bars includes a connector terminal portion (577) disposed in the connector portion. A rotor (21) in which a permanent magnet (23) for providing a field is disposed on an inner surface of a rotor core (22) connected to a rotating shaft of the internal combustion engine (12);
A stator core (32) which is arranged on the inner side of the rotor by being fixed to the body (13) of the internal combustion engine (12) and which forms a plurality of magnetic poles (32a) facing the permanent magnet on the radially outer side;
A stator coil mounted on the stator core, the plurality of coils (C1-C18) mounted on the plurality of magnetic poles, and disposed so as to extend in the circumferential direction along an axial end surface of the stator core; A stator coil (33, 433) having a plurality of bus bars (71, 571) connecting at least partially between the plurality of coils ;
A storage container (82, 95) for storing a plurality of the bus bars;
The container has a connector part (83) for providing an electrical connection,
At least one of the plurality of bus bars includes a connector terminal portion (577) disposed in the connector portion . The bus bar is an elongated quadrilateral whose cross section perpendicular to the extending direction has a longitudinal direction and a transverse direction;
In the connector terminal portion, the longitudinal direction of the cross section is arranged in a lateral posture intersecting the axial direction of the stator core,
14. The internal combustion engine according to claim 12, wherein a portion extending along a circumferential direction of the stator core is disposed in a longitudinal posture in which a longitudinal direction of the cross section extends along an axial direction of the stator core. Rotating electric machine. The storage container is disposed along an annular range in which the magnetic pole is disposed, and the storage container includes a coil lead (33a) extending from a coil disposed around the magnetic pole to connect the bus bar to the bus bar. 15. The internal combustion engine according to claim 9, further comprising a plurality of retracting portions (84) to be pulled in on both sides of the stator core on a radially inner side and a radially outer side. Rotating electric machine. A rotor (21) in which a permanent magnet (23) for providing a field is disposed on an inner surface of a rotor core (22) connected to a rotating shaft of the internal combustion engine (12);
A stator core (32) which is arranged on the inner side of the rotor by being fixed to the body (13) of the internal combustion engine (12) and which forms a plurality of magnetic poles (32a) facing the permanent magnet on the radially outer side;
A stator coil mounted on the stator core, the plurality of coils (C1-C18) mounted on the plurality of magnetic poles, and disposed so as to extend in the circumferential direction along an axial end surface of the stator core; A stator coil (33, 433) having a plurality of bus bars (71, 571) connecting at least partially between the plurality of coils ;
A storage container (82, 95) for storing a plurality of the bus bars;
The storage container is disposed along an annular range in which the magnetic pole is disposed, and the storage container includes a coil lead (33a) extending from a coil disposed around the magnetic pole to connect the bus bar to the bus bar. A rotating electrical machine for an internal combustion engine , having a plurality of retracting portions (84) to be pulled in on both the radially inner side and the radially outer side of the stator core . Further, disposed between the magnetic pole, claim 9, characterized in that it comprises a rotational position sensor (43) for detecting a rotational position of the rotor by detecting a magnetic flux of said permanent magnet, wherein claim 12 Item 17. The rotating electrical machine for an internal combustion engine according to any one of Items 16 above. And a rotational position sensor (43) disposed between the magnetic poles to detect the rotational position of the rotor by detecting the magnetic flux of the permanent magnet,
The rotational position sensor corresponds to the tip region of the magnetic pole, and is disposed so as to occupy at least a sensor installation range (41a) across the plurality of the magnetic poles,
The rotary electric machine for an internal combustion engine according to any one of claims 9 and 12 , wherein the plurality of bus bars are arranged in a range excluding the sensor installation range. The said bus-bar is being fixed in the said storage container by resin (A2) poured into the said storage container (81), The any one of Claims 9-12 The rotating electrical machine for internal combustion engines described in 1. A rotor (21) in which a permanent magnet (23) for providing a field is disposed on an inner surface of a rotor core (22) connected to a rotating shaft of the internal combustion engine (12);
A stator core (32) which is arranged on the inner side of the rotor by being fixed to the body (13) of the internal combustion engine (12) and which forms a plurality of magnetic poles (32a) facing the permanent magnet on the radially outer side;
A stator coil mounted on the stator core, the plurality of coils (C1-C18) mounted on the plurality of magnetic poles, and disposed so as to extend in the circumferential direction along an axial end surface of the stator core; A stator coil (33, 433) having a plurality of bus bars (71, 571) connecting at least partially between the plurality of coils ;
A rotational position sensor (43) disposed between the magnetic poles and detecting the rotational position of the rotor by detecting the magnetic flux of the permanent magnet;
The rotational position sensor corresponds to the tip region of the magnetic pole, and is disposed so as to occupy at least a sensor installation range (41a) across the plurality of the magnetic poles,
The rotating electric machine for an internal combustion engine , wherein the plurality of bus bars are arranged in a range excluding the sensor installation range . The rotary electric machine for an internal combustion engine according to claim 20 , further comprising a storage container (82, 95) for storing the plurality of bus bars. A rotor (21) in which a permanent magnet (23) for providing a field is disposed on an inner surface of a rotor core (22) connected to a rotating shaft of the internal combustion engine (12);
A stator core (32) which is arranged on the inner side of the rotor by being fixed to the body (13) of the internal combustion engine (12) and which forms a plurality of magnetic poles (32a) facing the permanent magnet on the radially outer side;
A stator coil mounted on the stator core, the plurality of coils (C1-C18) mounted on the plurality of magnetic poles, and disposed so as to extend in the circumferential direction along an axial end surface of the stator core; A stator coil (33, 433) having a plurality of bus bars (71, 571) connecting at least partially between the plurality of coils ;
A storage container (82, 95) for storing a plurality of the bus bars;
The rotary electric machine for an internal combustion engine , wherein the bus bar is fixed in the storage container by a resin (A2) poured into the storage container (81) . At least a part between the plurality of coils is connected by arranging the coil wire (33j) forming the coil so as to extend in the circumferential direction along the axial end surface of the stator core. The rotating electrical machine for an internal combustion engine according to any one of claims 9 to 22, wherein: The rotating electric machine for an internal combustion engine according to any one of claims 8 to 23 , wherein the plurality of bus bars are arranged in a radial direction on an axial end surface of the stator core. The plurality of bus bars have circumferentially extending portions (72, 572) extending along the circumferential direction of the stator core, and radially extending portions (74, 574) extending outward in the radial direction of the stator core. 25. The rotating electrical machine for an internal combustion engine according to any one of claims 8 to 24 . The rotating electrical machine for an internal combustion engine according to claim 25 , wherein the circumferentially extending portion and the radially extending portion are integrally formed of a continuous metal material.

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