WO2015174090A1 - Rotating electric machine for internal combustion engine - Google Patents

Abstract

A case (51) supports a rotational position sensor. The case (51) has a side wall (52a) by which a container (52) for housing a circuit board (42a) is bounded and formed. The circuit board (42a) has a plurality of sensor connection portions (42b) to which sensor terminals (43a) are connected and a plurality of external connection portions (42c) to which a plurality of lead wires (45) are connected. A sealing resin (56) is held in the container (52). A grommet (47) is provided in the side wall (52a). The grommet (47) is formed of a softer material than the case (51) and mounted on a recess portion so as to prevent the sealing resin (56) from leaking out. The lead wires (45) are disposed passing through the grommet (47) so as to prevent the sealing resin (56) from leaking out.

Description

Rotating electric machine for internal combustion engine Cross-reference of related applications

This application is based on Japanese Patent Application No. 2014-102656 filed on May 16, 2014, and the disclosure of the basic application is incorporated into this application by reference.

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

Patent Documents 1-4 disclose a rotating electrical machine for an internal combustion engine connected to the internal combustion engine. This rotating electrical machine can function as a generator and / or a starter. In addition, the rotating electrical machine outputs a reference position signal for the ignition device of the internal combustion engine. This rotating electrical machine includes a rotational position sensor for detecting the rotational position of the rotor in order to function as a starter. Further, the rotating electrical machine includes a rotational position sensor for outputting a reference position signal for the ignition device.

Rotating electric machine has a case for supporting a plurality of rotational position sensors. A circuit board for electrically connecting the plurality of rotational position sensors and the plurality of lead wires is disposed in the case.

The plurality of lead wires disclosed in Patent Document 1 and Patent Document 2 extend from the case to the outside at different positions on the case. A plurality of thin lead wires are bundled outside the case. The lead wire of Patent Document 1 passes through a through hole provided in the case.

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

JP 2010-200421 A Patent No. 5064279 JP 2013-233030 A JP 2013-27252 A

In the configuration of the prior art, a plurality of thin lead wires are exposed over a long length outside the case. Thin leads are prone to damage during the manufacturing process, during use, and during maintenance. In addition, a long exposed lead leads to an increase in weight and price. Also, multiple seal structures may be required for multiple lead wires.

From another point of view, it is difficult to prevent leakage of the sealing resin at a plurality of positions on the case with the configuration of the conventional technique. For example, it has been difficult to obtain high sealing performance in a plurality of through holes. The leaked sealing resin may damage the appearance and may cause an undesirable change in the shape of the case.

From another point of view, the configuration of the prior art requires a difficult manufacturing process or a manufacturing process that increases the price. For example, a process of inserting a plurality of lead wires into a plurality of through holes requires precise work. In addition, since the plurality of lead wires are soldered to the wiring pattern on the circuit board in the case, an even higher degree of difficulty is required for the insertion process. Also, the difficulty of soldering work is increased. Moreover, the operation | work which inserts a thin lead wire in the through-hole of a hard case tends to damage the coating | cover of a lead wire. Moreover, it is difficult to achieve both the ease of inserting the lead wire and the sealing performance due to the close contact between the through hole and the lead wire.

In the above-mentioned viewpoints or other viewpoints not mentioned, further improvements are required for the rotating electrical machines for internal combustion engines.

One of the objects of the invention is to provide a rotating electrical machine for an internal combustion engine that can suppress exposure of a lead wire for a signal indicating the rotational position of a rotor.

One of the objects of the invention is to provide a rotating electrical machine for an internal combustion engine that can suppress leakage of resin from a case.

One of the objects of the invention is to provide a rotating electrical machine for an internal combustion engine capable of suppressing the length of a lead wire.

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.

One invention disclosed herein provides a rotating electrical machine for an internal combustion engine. A rotating electrical machine for an internal combustion engine according to the present invention includes a rotor (21) having a permanent magnet (23) disposed on an inner surface of a rotor yoke (22) coupled to a rotating shaft of the internal combustion engine (12), and the internal combustion engine (12). A stator (31) having a stator core (32) disposed on the inner side of the rotor by being fixed to the body (13) and forming a plurality of magnetic poles facing the permanent magnet on the radially outer side, and a rotational position of the rotor A rotational position sensor (43) to detect, a plurality of lead wires (45, 445) for supplying a signal output from the rotational position sensor to the outside, a sensor connection portion (42b) to which the rotational position sensor is connected, and a plurality of A circuit board (42a) having an external connection portion (42c, 442c) to which the lead wire is connected and a container (52) for accommodating the rotational position sensor and the circuit board. A case (51) having side walls (52a, 252a) for image formation, and a sealing resin (56) stored in the container so as to seal the circuit board. It arrange | positions so that it may extend intensively from the drawer | drawing-out part (52c, 47, 347) provided in the part.

According to the present invention, a plurality of lead wires extend intensively from a part of the case. As a result, the lead wire is not arranged long along the case. As a result, exposure of a plurality of lead wires on the case is suppressed.

One invention disclosed herein includes a plurality of rotational position sensors arranged circumferentially apart from each other with respect to the rotation axis of the rotor, and the circuit board extends in the circumferential direction over an installation range of the plurality of rotational position sensors. The plurality of sensor connection portions (42b) are distributed on the circuit board in correspondence with the positions of the plurality of rotational position sensors, and the plurality of external connection portions (42c) are the plurality of sensor connection portions. Is narrower than the range in which is arranged, and is intensively arranged in a range near the drawer. According to the present invention, a plurality of external connection portions to which a plurality of lead wires are connected are concentrated on a part of the circuit board. In addition, the plurality of external connection portions are arranged near the drawer portion. As a result, connection work between a plurality of lead wires and a plurality of external connection portions can be performed intensively. In addition, the length of the plurality of lead wires in the case can be suppressed.

One invention disclosed herein provides a rotating electrical machine for an internal combustion engine. A rotating electrical machine for an internal combustion engine according to the present invention includes a rotor (21) having a permanent magnet (23) disposed on an inner surface of a rotor yoke (22) coupled to a rotating shaft of the internal combustion engine (12), and the internal combustion engine (12). A stator (31) having a stator core (32) disposed on the inner side of the rotor by being fixed to the body (13) and forming a plurality of magnetic poles facing the permanent magnet on the radially outer side, and a rotational position of the rotor A rotational position sensor (43) to detect, a plurality of lead wires (45, 445) for supplying a signal output from the rotational position sensor to the outside, a sensor connection portion (42b) to which the rotational position sensor is connected, and a plurality of A circuit board (42a) having an external connection portion (42c, 442c) to which the lead wire is connected and a container (52) for accommodating the rotational position sensor and the circuit board. Comprising image forming side walls (52a, 252a) and case (51) having, a sealing resin accumulated in the container so as to seal the circuit board (56). The side wall has a recess (52c) formed so as to extend from the edge (52b) of the opening end of the container to below the surface of the sealing resin, and is further formed of a material softer than the case. A grommet (47, 347) is provided in the recess to prevent leakage, and the plurality of lead wires are disposed through the grommet to prevent leakage of the sealing resin. And

According to the present invention, the plurality of lead wires are disposed so as to penetrate the grommets attached to the concave portions of the side walls. The plurality of lead wires are not arranged long along the outside of the case. As a result, damage to a plurality of lead wires is suppressed. A grommet that is softer than the case makes it possible to suppress leakage of the sealing resin. The grommet that is softer than the case is likely to be in close contact with the surface that forms the recess. The grommet prevents leakage of the sealing resin that passes between the recess and the grommet. A grommet that is softer than the case tends to adhere to a plurality of lead wires. For this reason, the grommet prevents leakage of the sealing resin that passes between the plurality of lead wires and the grommet. A grommet that is softer than the case enables an easy operation for arranging a plurality of lead wires through the grommet.

One invention disclosed herein includes a plurality of rotational position sensors arranged away from each other in the circumferential direction with respect to the rotation axis of the rotor, and the circuit board extends in the circumferential direction over the installation range of the plurality of rotational position sensors. The plurality of sensor connection portions (42b) are distributed on the circuit board in correspondence with the positions of the plurality of rotational position sensors, and the plurality of external connection portions (42c) are the plurality of sensor connection portions. Is narrower than the range in which it is arranged and is intensively arranged in a range near the grommet. According to the present invention, a plurality of external connection portions to which a plurality of lead wires are connected are concentrated on a part of the circuit board. In addition, the plurality of external connection portions are arranged near the grommet. As a result, connection work between a plurality of lead wires and a plurality of external connection portions can be performed intensively. In addition, the length of the plurality of lead wires in the case can be suppressed.

One invention disclosed herein provides a rotating electrical machine for an internal combustion engine. A rotating electrical machine for an internal combustion engine according to the present invention includes a rotor (21) having a permanent magnet (23) disposed on an inner surface of a rotor yoke (22) coupled to a rotating shaft of the internal combustion engine (12), and the internal combustion engine (12). A stator (31) having a stator core (32) disposed on the inner side of the rotor by being fixed to the body (13) and forming a plurality of magnetic poles facing the permanent magnet on the radially outer side, and a rotational position of the rotor A rotational position sensor (43) to detect, a plurality of lead wires (45, 445) for supplying a signal output from the rotational position sensor to the outside, a sensor connection portion (42b) to which the rotational position sensor is connected, and a plurality of A circuit board (42a) having an external connection portion (42c, 442c) to which the lead wire is connected and a container (52) for accommodating the rotational position sensor and the circuit board. A case (51) having side walls (52a, 252a) for image formation, and a sealing resin (56) stored in the container so as to seal the circuit board, the side wall being an edge of the opening end of the container (52b) having a recess (52c) formed so as to extend below the surface of the sealing resin, the lead wire extending through the side wall, and the case And a member (47, 347) which is disposed in the recess and supplements the side wall so that the sealing resin can be stored inside the container.

It is sectional drawing of the rotary electric machine for internal combustion engines which concerns on 1st Embodiment of invention. It is the top view seen in the arrow II direction of FIG. It is a top view which shows the external appearance of a grommet. It is a top view of the rotary electric machine for internal combustion engines which concerns on 2nd Embodiment of invention. It is a top view of the rotary electric machine for internal combustion engines which concerns on 3rd Embodiment of invention. It is a top view of the rotary electric machine for internal combustion engines which concerns on 4th Embodiment of invention. It is a top view of the grommet concerning a 5th embodiment of the invention. It is a top view of the grommet concerning a 6th embodiment of the invention. It is a top view of the grommet concerning a 7th embodiment of the invention.

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.

The electrical circuit 11 provides a rectifier circuit that rectifies the AC power that is output when the rotating electrical machine 10 functions as a generator and supplies power to an electrical load including a 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 a starter motor. The electric 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, and controls the energization of the rotating electrical machine 10 according to the detected rotational position to thereby start the rotating electrical machine 10. It functions as a motor.

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. 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 electrical machine 10 includes a rotor 21, a stator 31, and a sensor unit 41.

The entire rotor 21 has a cup shape. 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 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 yoke (rotor core) 22. The rotor yoke 22 is connected to the rotating shaft 14 of the internal combustion engine 12. The rotor yoke 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 yoke 22 provides a yoke for a permanent magnet described later. The rotor yoke 22 is made of magnetic metal.

The rotor 21 has a permanent magnet 23 disposed on the inner surface of the rotor yoke 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 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 yoke 22.

The rotor 21 is fixed to 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 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 yoke 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 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 a rotational position detector that detects the rotational position of the rotor 21 by detecting the magnetic flux supplied by the permanent magnet 23 provided in the rotor 21. The sensor unit 41 includes a plurality of rotational position sensors 43 that 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 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 of the field provided by the permanent magnet 23 in the rotational direction. 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 is fixed to the stator 31 with fixing bolts 44. The sensor unit 41 is fixed to the stator 31 at the radially inner portion. Further, the sensor unit 41 is positioned between the stator 31 and the body 13 at a radially outer portion. The sensor unit 41 is elastically pressurized between the stator 31 and the body 13 and fixed between them.

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 accommodating 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 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.

Each rotation 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.

The cover 53 is inserted into the gap between the magnetic poles of the stator core 32. A cover 53 extending from the container 52 accommodates a rotational position sensor 43 therein. The position of the rotational position sensor 43 in the axial direction is set so that the magnetic flux to be detected can be detected. The cover 53, that is, the sensor unit 41 is positioned on the stator core 32 with respect to the axial direction. 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 No. 5064279, Japanese Patent Application Laid-Open No. 2013-233030, or Japanese Patent Application Laid-Open No. 2013-233030. The contents described in JP2013-27252A can be incorporated, and the description can be cited by reference.

The case 51 has a tightening portion 54. The tightening portion 54 is provided radially inward of the container 52 with respect to the radial direction of the rotating electrical machine 10 for the internal combustion engine. The tightening portion 54 is fastened to the stator 31 by the fixing bolt 44. A connecting portion 55 is provided between the container 52 and the tightening portion 54 to connect them. The tightening portion 54 and the connecting portion 55 extend radially inward from the container 52 and are positioned in an annular portion formed on the radially inner side of the stator core 32. 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 tightening portion 54 is positioned on the surface of the stator core 32 that faces the body 13. The tightening portion 54 is provided with a female screw portion that receives the fixing bolt 44. The female thread portion can be provided by forming a female thread directly in the resin material or by embedding a nut member in the resin material. The fixing bolt 44 fastens the fastening portion 54 to the stator core 32. 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 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 plurality of covers 53 extend along the axial direction of the rotating electrical machine 10 from the bottom surface toward the gap between the stators 32. A circuit component 42 is accommodated in the container 52. 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 sealing resin 56 is poured into the container 52 in a fluid state and is cured. The liquid level of the sealing resin 56 is substantially equal to or lower than the opening end of the container 52.

The case 51 has a stay 57. The stay 57 is fixed to the body 13 by a fixing bolt 58. The stay 57 is integrally formed so as to be continuous from the container 52 by the same resin material as the container 52.

FIG. 2 is a plan view of the sensor unit 41 as viewed from the body 13. In the drawing, the central annular portion of the stator core 32 is also shown. The stator core 32 is provided with a central through hole 32c and three through holes 32d for disposing the fixing bolts 34. Further, the stator core 32 is provided with a through hole (not shown) through which the fixing bolt 44 is disposed.

The container 52 extends in a substantially arcuate range along the radially outer portion of the stator 31. A plurality of rotational position sensors 43 and a plurality of covers 53 are arranged within a circumferential range in which the container 52 extends. The plurality of rotational position sensors 43 and the plurality of covers 53 are arranged at equal intervals. 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 sensor unit 41 has a symmetry axis SYM. The symmetry axis SYM is also the symmetry axis of the three through holes 32d. The symmetry axis SYM passes through one through hole 32d and is located at the center of the two through holes 32d. The container 52 extends in the circumferential direction with respect to the rotation axis of the rotor 21. The container 52 extends symmetrically with respect to the symmetry axis SYM. The side wall 52 a that defines the container 52 has a symmetrical shape along the circumferential direction with respect to the rotation axis of the rotor 21. The plurality of rotational position sensors 43 and the plurality of covers 53 are arranged symmetrically on both sides in the circumferential direction with respect to the symmetry axis. The two connecting portions 55 are arranged at symmetrical positions in the circumferential direction with respect to the symmetry axis SYM. In the tightening portion 54, the fixing bolt 44 is disposed on the symmetry axis SYM.

The stay 57 is arranged symmetrically with respect to the circumferential direction in order to support the container 52 spreading in the circumferential direction with respect to the rotation axis of the rotor 21 in a balanced manner. In this embodiment, only one stay 57 is arranged on the symmetry axis SYM. Thereby, the stay 57 can support the sensor unit 41 in a balanced manner.

FIG. 2 does not show the sealing resin 56. This is to show the circuit component 42, the lead wire 45, and the like immersed in the sealing resin 56. In the actual product, the inside of the container 52 is completely covered with the sealing resin 56.

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. A bundle of the plurality of lead wires 45 is covered with a cover 46 for protecting them. The cover 46 is made of resin. The cover 46 can be provided by a heat shrinkable resin.

A grommet 47 is provided on the side wall 52 a of the container 52. The grommet 47 is made of a material that is softer than the material of the case 51. The grommet 47 is made of rubber. The plurality of lead wires 45 are disposed through the grommet 47. A sealed state is provided between the grommet 47 and the lead wire 45 that can prevent leakage of the sealing resin 56. The sealing state between the grommet 47 and the lead wire 45 can be provided by a surface contact between them or a line contact between the seal lip formed on the grommet 47 and the lead wire 45.

As shown in the drawing, the side wall 52a extends so as to surround a fan-shaped area. The side wall 52a surrounds a symmetric range with respect to the symmetry axis SYM. The grommet 47 is provided in a portion of the side wall 52a facing in the circumferential direction with respect to the rotation axis of the rotor 21. The grommet 47 is provided on one side in the circumferential direction. The grommet 47 is provided on the circumferential surface of the substantially fan-shaped case 51. In the example shown in the drawing, the side wall 52a is provided on a narrow flat plate portion facing in the circumferential direction. Such an arrangement of the grommets 47 facilitates the arrangement of the bundle of lead wires 45 on the body 13.

FIG. 3 shows the appearance of the part where the grommet 47 is provided. In the drawing, a plurality of lead wires 45 are shown in cross section.

The side wall 52a has a recess 52c. The recess 52 c is a groove formed in a concave shape from the edge 52 b at the opening end of the container 52. The recess 52 c is formed so as to extend from the edge 52 b of the opening end of the container 52 to below the surface of the sealing resin 56. A plurality of lead wires 45 are disposed in the recess 52c so as to extend through the side wall 52a. The recess 52c is located at one end in the circumferential direction with respect to the rotation axis of the rotor 21 on the side wall 52a.

The grommet 47 is disposed in the recess 52c. The grommet 47 is disposed so as to cover the recess 52c. The grommet 47 supplements the side wall 52 a so that the sealing resin 56 can be stored inside the container 52. The grommet 47 is disposed so as to straddle the inner side and the outer side of the side wall 52a in the recess 52c. The grommet 47 is attached to the recess 52c so as to prevent the sealing resin 56 from leaking out. Grommet 47 is in close contact with side wall 52a so as to prevent leakage of sealing resin 56 in recess 52c.

The grommet 47 has a plurality of through holes 47a for holding the plurality of lead wires 45 in a penetrating state. The at least one through hole 47a is positioned at a position lower than the surface (liquid level) of the sealing resin 56. In the illustrated example, all the through holes 47 a are positioned below the surface of the sealing resin 56. The plurality of lead wires 45 are disposed through the grommet 47 so as to prevent leakage of the sealing resin 56.

Returning to FIG. 2, the recess 52 c and / or the grommet 47 provided in the side wall 52 a provides a lead-out portion for the plurality of lead wires 45. The plurality of lead wires 45 are arranged so as to intensively extend from a lead portion provided in a part of the case 51. The plurality of lead wires 45 intensively extend from only one end of the container 52 in the circumferential direction with respect to the rotation axis of the rotor 21. The plurality of lead wires 45 are arranged so as to extend from the side wall 52 a in the circumferential direction with respect to the rotation axis of the rotor 21. As a result, the lead wire 45 is not disposed long along the case 51. Therefore, the exposure of the plurality of lead wires 45 on the case 51 is suppressed.

The grommet 47 provides a seal member provided between the side wall 52a and the plurality of lead wires 45 in the recess 52c. Prevention of leakage of the sealing resin 56 is achieved by a seal member provided in the recess 52c. The seal member is provided so as to prevent leakage of the sealing resin 56. The grommet 47 can intensively prevent leakage of the sealing resin 56 with respect to the plurality of lead wires 45.

The circuit component 42 has a circuit board 42a for providing electrical wiring. The circuit board 42 a provides a connection member that electrically connects the plurality of rotational position sensors 43 and the plurality of lead wires 45. The circuit board 42a can be provided by a printed wiring board. The circuit board 42a can include circuit components that constitute a filter circuit or the like.

The circuit board 42 a is arranged so as to overlap with the rotational position sensor 43 in the axial direction of the rotating electrical machine 10. The circuit board 42a extends so as to overlap all of the plurality of rotational position sensors 43, that is, all of the plurality of sensor terminals 43a, in the axial direction of the rotating electrical machine 10. By arranging the circuit board 42a behind the rotational position sensor 43, the sensor terminal 43a extending in the axial direction from the rotational position sensor 43 and the circuit board 42a can be directly connected. The circuit board 42 a has a shape corresponding to the internal shape of the container 52. The circuit board 42 a extends over at least an arc-shaped range so as to be positioned behind the plurality of rotational position sensors 43. The circuit board 42 a extends in the circumferential direction over the installation range of the plurality of rotational position sensors 43. The circuit board 42a has a symmetrical shape with respect to the symmetry axis SYM. The circuit board 42a has a shape that can be called a fan shape.

The circuit board 42a has a sensor connection part 42b for connecting the rotational position sensor 43 and the circuit board 42a. The circuit board 42 a has a plurality of sensor connection portions 42 b corresponding to the positions of the plurality of rotational position sensors 43. The sensor connecting portion 42b can be provided by a plurality of through holes and lands for receiving the sensor terminal 43a extending from the rotational position sensor 43 and connecting them by soldering. The land is a conductor pattern for soldering. In the figure, four groups of sensor connecting portions 42b are shown. One group includes three through holes and three lands.

The circuit board 42a has an external connection part 42c for connecting the lead wire 45 and the circuit board 42a. The external connection portion 42c can be provided by a land for connecting the lead wire 45 by soldering. The external connection portion 42 c can include a through hole that receives the distal end portion of the lead wire 45. In the figure, six external connection portions 42c are provided.

The circuit board 42a has a wiring 42d for electrically connecting the sensor connection portion 42b and the external connection portion 42c. The wiring 42d can be provided by printed wiring. In the drawing, a part of the wiring 42d is representatively shown.

The plurality of external connection portions 42c are intensively arranged on the circuit board 42a. In contrast, the plurality of sensor connection portions 42b are arranged so as to be widely distributed on the circuit board 42a. The plurality of sensor connection portions 42 b are distributed and arranged on the circuit board 42 a corresponding to the positions of the plurality of rotational position sensors 43. The plurality of external connection portions 42c are intensively arranged in a range narrower than the range in which the plurality of sensor connection portions 42b are arranged. Such a concentrated arrangement of the plurality of external connection portions 42c makes it possible to suppress a difference in length of the plurality of lead wires 45 in the container 52.

The plurality of external connection portions 42c are arranged asymmetrically on the circuit board 42a. In contrast, the plurality of sensor connection portions 42b are arranged symmetrically on the circuit board 42a. The plurality of external connection portions 42c are intensively disposed in the vicinity of the grommet 47 on the circuit board 42a. The plurality of external connection parts 42c are arranged only in the half part of the circuit board 42a closer to the grommet 47 than the symmetry axis SYM. The plurality of external connection portions 42 c are intensively arranged in the vicinity of the grommet 47 in the radial direction of the rotating electrical machine 10. The plurality of external connection portions 42c are concentrated on the edge of the circuit board 42a. The plurality of external connection portions 42c are arranged on the edge of the circuit board 42a. The plurality of external connection portions 42 c are intensively arranged in a narrow area near the drawer portion, that is, the grommet 47. Such arrangement of the plurality of external connection portions 42 c makes it possible to suppress the length of the plurality of lead wires 45 in the container 52. The plurality of lead wires 45 are connected to the external connection portion 42 c disposed in the vicinity of the grommet 47 without being laid in the container 52 for a long time.

The plurality of lead wires 45 are slightly exposed from the cover 46 outside the grommet 47. However, the plurality of lead wires 45 are not widely dispersed and exposed along the case 51. The plurality of lead wires 45 extend in a bundle from the side surface of the case 51 facing one side in the circumferential direction around the rotation axis of the rotor 21. As a result, the plurality of lead wires 45 can be easily protected. For example, external force can be shared by the plurality of lead wires 45.

In the manufacturing method of the rotating electrical machine 10, the plurality of lead wires 45 are inserted into the plurality of through holes 47a. The through hole 47a is formed to have a slightly smaller diameter than the lead wire 45 before the lead wire 45 is inserted. The grommet 47 has elasticity that can expand the through hole 47a by inserting the lead wire 45 at least around the through hole 47a. Since the plurality of grommets 47 are made of a soft resin, the lead wires 45 can be easily inserted. Moreover, the soft resin provides a good sealing state between the grommet 47 and the lead wire 45.

In the manufacturing method, the plurality of lead wires 45 are inserted into the grommet 47 along the longitudinal direction thereof. Thereafter, the grommet 47 is attached to the recess 52c. The grommet 47 is attached to the recess 52c after the plurality of lead wires 45 are connected to the external connection portion 42c. As a result, it is possible to employ a manufacturing process in which a partial assembly including the circuit board 42a, the plurality of lead wires 45, and the grommet 47 is assembled and then the partial assembly is combined with the case 51. When this manufacturing process is employed, the connection work on the circuit board 42a is possible without being obstructed by the case 51.

The sealing resin 56 is stored in the container 52 after the circuit board 42a is accommodated in the container 52 and the grommet 47 is mounted in the recess 52c. The sealing resin 56 is stored in the container 52 in a flowable state and is cured so as to seal the circuit board 42a. During the period in which the sealing resin 56 can flow, the close contact between the grommet 47 and the side wall 52a prevents the sealing resin 56 from leaking out. Further, during the period in which the sealing resin 56 can flow, the close contact between the grommet 47 and the lead wire 45 prevents the sealing resin 56 from leaking out.

According to this embodiment, the lead wire 45 is disposed through the grommet 47 attached to the recess 52c formed in the case 51. As a result, the work for arranging the lead wires 45 is facilitated. Moreover, since the lead wire 45 is fixed by the grommet 47 made of a soft resin, high sealing performance can be realized. As a result, leakage of the sealing resin 56 before curing can be suppressed. Therefore, the removal work of the leaked sealing resin 56 can be suppressed. Further, since the grommet 47 is provided on the side wall 52a away from the tightening portion 54 and the stay 57, even if the sealing resin 56 leaks, the fixing of the sensor unit 41 is not adversely affected.

After the circuit board 42a and the lead wire 45 are soldered at the external connection portion 42c, the circuit board 42a can be accommodated in the container 52. For this reason, soldering work becomes easy. The plurality of external connection portions 42c are arranged asymmetrically on the circuit board 42a. For this reason, the soldering work can be concentrated in a narrow range on the circuit board 42a. Further, since the appearance of the circuit board 42a is asymmetrical, the front and back of the circuit board 42a can be easily distinguished.

(Second Embodiment)
This embodiment is a modification based on the preceding embodiment. In the above embodiment, the case 51 has a symmetrical shape. Instead, in this embodiment, the case 51 has a left-right asymmetric shape.

As shown in FIG. 4, the case 51 has a shape in which one of the symmetry axes SYM is larger than the other. The case 51 has a side wall 252 a that partitions the asymmetric container 52. The side wall 252a is larger than the other in one of the circumferential directions on the case 51. The circumferential direction is a circumferential direction related to the rotation axis of the rotor 21. The asymmetric shape of the case 51 is provided by projecting a part of the side wall 252a in the direction in which the plurality of lead wires 45 extend. This shape provides a volume for placing a plurality of lead wires 45 within the container 52. The asymmetric container 52 forms a relatively large working space around the plurality of external connection portions 42c. For this reason, the operation | work which arrange | positions the some lead wire 45 in the container 52 is easy.

The side wall 252a provides a wider plane on one side in the circumferential direction of the case 51 than on the other side. A grommet 47 is provided on this wide flat portion. The asymmetric container 52 forms a part suitable for disposing the grommet 47 only on a part of the side wall 252a.

(Third embodiment)
This embodiment is a modification based on the preceding embodiment. A small grommet 47 is used. Instead, in this embodiment, the sensor unit 41 has a relatively large grommet 347.

As shown in FIG. 5, a grommet 347 is provided on a wide plane portion. The wide plane allows the use of a relatively large grommet 347. The grommet 347 extends long along the edge of the opening end of the container 52. The grommet 347 is wider than the grommet 47 described above. According to this embodiment, the plurality of lead wires 45 can be arranged with a high degree of freedom.

(Fourth embodiment)
This embodiment is a modification based on the preceding embodiment. In the above embodiment, the plurality of external connection portions 42c are arranged intensively and biased. Instead, this embodiment employs a plurality of external connection portions 442c that are widely distributed and symmetrically arranged.

As illustrated in FIG. 6, the circuit board 42a has a plurality of external connection portions 442c. The plurality of external connection portions 442c are widely distributed on the circuit board 42a. In addition, the plurality of external connection portions 442c are arranged symmetrically on the left and right of the symmetry axis SYM on the circuit board 42a. The plurality of lead wires 445 extend from the grommet 347 into the container 52. The plurality of lead wires 445 are laid between the grommet 347 and the corresponding external connection portion 442c. The plurality of lead wires 445 are laid in the container 52 over different lengths. A part of the plurality of lead wires 445 is laid over substantially the entire length of the container 52 in the circumferential direction. Thus, this embodiment requires a plurality of relatively long lead wires 445 within the container 52. Also in this embodiment, the plurality of lead wires 445 are led out from the grommet 347 in a concentrated manner.

(Fifth embodiment)
This embodiment is a modification based on the preceding embodiment. In the above embodiment, the grommet 47 has the through hole 47a for inserting the lead wire 45 in the axial direction. Instead, in this embodiment, the grommet 47 has a slit 447b that sandwiches the lead wire 45.

As shown in FIG. 7, the grommet 47 has a slit 547b. The slit 547 b extends from the edge of the grommet 47 into the grommet 47 and penetrates between both surfaces of the grommet 47. The slit 547b has a shape that closes so that the sealing resin 56 does not leak when the grommet 47 is mounted in the recess 52c without the lead wire 45. The slit 547 b extends from the edge 52 b of the opening end of the container 52 along the depth direction of the container 52. The slit 547b provides a holding portion for holding the lead wire 45 in a sealed state. The slit 547b can be formed by a step of cutting the grommet 47 or a molding step.

The grommet 47 has a plurality of slits 547b. The plurality of slits 547b are parallel to each other. The grommet 47 has three slits 547b that are widely spread and distributed along the edge 52b. One slit 547b has a length that can accommodate a plurality of lead wires 45. In the illustrated example, two lead wires 45 are arranged in one slit 547b.

In the manufacturing method of the rotating electrical machine 10, the lead wire 45 is pushed into the slit 547b along its radial direction. The grommet 47 is attached to the lead wire 45 so as to wrap the lead wire 45 in the slit 547b from the outside in the radial direction of the lead wire 45. The grommet 47 brings the inner surface of the slit 547b into contact with the lead wire 45 by its own elasticity or by its own elasticity and the pressing force by being housed in the recess 52c. By setting a tightening allowance for the grommet 47 to be compressed in the recess 52c, adhesion between the grommet 47 and the lead wire 45 is ensured. After the grommet 47 is mounted at least in the recess 52c, the inner surface of the slit 547b and the lead wire 45 are brought into close contact so as to prevent leakage of the sealing resin 56.

The slit 547b makes it possible to combine the lead wire 45 and the grommet 47 along the radial direction of the lead wire 45 at an arbitrary position of the lead wire 45. Therefore, it is easier to combine the lead wire 45 and the grommet 47 than when the lead wire 45 is inserted in the axial direction.

(Sixth embodiment)
This embodiment is a modification based on the preceding embodiment. In the above embodiment, two lead wires 45 are arranged in one slit 547b. Instead, in this embodiment, three lead wires 45 are arranged in one slit 647b.

As shown in FIG. 8, the grommet 47 has two slits 647b. In one slit 647b, three lead wires 45 are arranged along the length direction of the slit 647b. According to this embodiment, a plurality of lead wires 45 can be intensively arranged.

(Seventh embodiment)
This embodiment is a modification based on the preceding embodiment. In the above embodiment, the lead wire 45 is disposed in the through hole 47a or the slit 547b. Instead, in this embodiment, the lead wire 45 is disposed in the groove 747c.

As shown in FIG. 9, the grommet 47 has a groove 747c that can be called a U-shaped or V-shaped. The groove 747 c extends from the edge of the grommet 47 into the grommet 47 and penetrates between both surfaces of the grommet 47. The groove 747c has such a size that the grommet 47 still communicates with both sides of the grommet 47 even when the grommet 47 is mounted in the recess 52c without the lead wire 45. The groove 747c holds the lead wire 45 in a sealed state by the lead wire 45 being pushed into the groove 747c along its radial direction. In the manufacturing method of the rotating electrical machine 10, the lead wire 45 is placed in the groove 747c along the radial direction.

The groove 747c has a size capable of accommodating a plurality of lead wires 45. In order to fill the gap between the inner surface of the groove 747c and the lead wire 45 and the gap between the lead wire 45 and the lead wire 45, an adhesive or a caulking agent can be applied.

According to this embodiment, the plurality of lead wires 45 can be brought into a lump bundle on the grommet 47. As a result, the plurality of lead wires 45 can be arranged so as to extend from the grommet 47 in a bundled state. Moreover, the width of the grommet 47 can be reduced. Thereby, the lead wire 45 is not arranged along the outer surface of the case 51. Therefore, exposure of the lead wire 45 on the outer surface of the case 51 is suppressed.

(Other embodiments)
The invention disclosed herein is not limited to the embodiments for carrying out the invention, and can be implemented with various modifications. 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.

For example, in the above embodiment, the plurality of lead wires are arranged so as to extend as a bundle from the side wall in the circumferential direction. Instead of this, the plurality of lead wires may be arranged so as to extend from the radially outer side of the side wall toward the radially outer side. The plurality of lead wires may be arranged so as to extend from the container 52 along the axial direction of the rotor 21. Also in these configurations, since the plurality of lead wires extend as a bundle without being dispersed, exposure of the lead wires can be suppressed and damage can be suppressed.

In addition to the above embodiment, a protective member such as a tape may be provided between the grommet 47 and the cover 46 in order to further suppress the exposure of the plurality of lead wires 45. Further, a protective cylinder portion that can be connected to the cover 46 may be provided on the grommet 47. Further, the grommet may be formed outside the bundle of the plurality of lead wires 45. For example, a bundle of a plurality of lead wires 45 can be placed in a mold, and the grommet 47 can be molded with rubber or resin around it.

In the above embodiment, rubber grommets are used. Instead of this, a plurality of lead wires 45 may be arranged so as to penetrate the side wall 52a without providing a grommet. For example, a bundle of a plurality of lead wires 45 can be arranged directly in the recess 52c. In this case, leakage of the sealing resin 56 may be prevented by disposing an adhesive, a filler, or the like between the side wall 52a and the bundle of the plurality of lead wires 45. Even in such a configuration, the plurality of lead wires 45 can be arranged so as to extend from the side wall 52 a of the case 51.

In the above embodiment, the sensor unit includes both a rotational position sensor for motor control and a rotational position sensor for ignition control. Instead, the sensor unit can be configured to include at least one of a rotational position sensor for motor control and a rotational position sensor for ignition control. For example, the sensor block may include only a rotational position sensor for motor control.

In the above embodiment, a plurality of lead wires 45 are arranged in one slit 447b, 547b. Instead of this, one lead wire may be disposed in one of the slits. Moreover, you may arrange | position four or more lead wires in one slit.

Claims (19)

1. A rotor (21) in which a permanent magnet (23) is arranged on the inner surface of a rotor yoke (22) connected to the rotating shaft of the internal combustion engine (12);
   A stator (31) having a stator core (32) which is disposed 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 opposed to the permanent magnet on the radially outer side. )When,
   A rotational position sensor (43) for detecting the rotational position of the rotor;
   A plurality of lead wires (45, 445) for supplying a signal output from the rotational position sensor to the outside;
   A circuit board (42a) having a sensor connection part (42b) to which the rotational position sensor is connected and an external connection part (42c, 442c) to which the plurality of lead wires are connected;
   A case (51) having side walls (52a, 252a) for accommodating the rotational position sensor and defining a container (52) for accommodating the circuit board;
   A sealing resin (56) stored in the container so as to seal the circuit board;
   The rotating electric machine for an internal combustion engine, wherein the plurality of lead wires are arranged so as to intensively extend from lead portions (52c, 47, 347) provided in a part of the case.
2. 2. The rotating electrical machine for an internal combustion engine according to claim 1, wherein the plurality of lead wires are arranged so as to extend from the side wall in a circumferential direction with respect to a rotation axis of the rotor.
3. The side wall has a recess (52c) that is arranged so that a plurality of the lead wires extend through the side wall, and is provided in one of the circumferential directions with respect to the rotation axis of the rotor,
   The seal member (47, 347) provided between the side wall and the plurality of lead wires so as to prevent leakage of the sealing resin in the concave portion. Rotating electric machine for internal combustion engines.
4. A plurality of the rotational position sensors arranged apart from each other in the circumferential direction with respect to the rotational axis of the rotor;
   The circuit board extends in the circumferential direction over an installation range of the plurality of rotational position sensors,
   The plurality of sensor connection portions (42b) are distributed and arranged on the circuit board corresponding to the positions of the plurality of rotational position sensors,
   The plurality of external connection portions (42c) are narrower than a range in which the plurality of sensor connection portions are arranged, and are intensively arranged in a range near the drawer portion. Item 4. The rotating electrical machine for an internal combustion engine according to any one of Items 3 to 5.
5. A rotor (21) in which a permanent magnet (23) is arranged on the inner surface of a rotor yoke (22) connected to the rotating shaft of the internal combustion engine (12);
   A stator (31) having a stator core (32) which is disposed 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 opposed to the permanent magnet on the radially outer side. )When,
   A rotational position sensor (43) for detecting the rotational position of the rotor;
   A plurality of lead wires (45, 445) for supplying a signal output from the rotational position sensor to the outside;
   A circuit board (42a) having a sensor connection part (42b) to which the rotational position sensor is connected and an external connection part (42c, 442c) to which the plurality of lead wires are connected;
   A case (51) having side walls (52a, 252a) for accommodating the rotational position sensor and defining a container (52) for accommodating the circuit board;
   A sealing resin (56) stored in the container so as to seal the circuit board;
   The side wall has a recess (52c) formed so as to spread from the edge (52b) of the open end of the container to below the surface of the sealing resin,
   Furthermore, the grommet (47, 347) is formed of a softer material than the case, and is attached to the recess so as to prevent leakage of the sealing resin.
   The rotating electrical machine for an internal combustion engine, wherein the plurality of lead wires are disposed through the grommet so as to prevent leakage of the sealing resin.
6. A plurality of rotational position sensors arranged apart from each other in the circumferential direction with respect to the rotational axis of the rotor;
   The circuit board extends in the circumferential direction over an installation range of the plurality of rotational position sensors,
   The plurality of sensor connection portions (42b) are distributed and arranged on the circuit board corresponding to the positions of the plurality of rotational position sensors,
   The plurality of external connection portions (42c) are narrower than a range in which the plurality of sensor connection portions are arranged, and are intensively arranged in a range near the grommet. Rotating electric machine for internal combustion engines.
7. The rotary electric machine for an internal combustion engine according to claim 5 or 6, wherein the grommet has a plurality of through holes (47a) through which the plurality of lead wires penetrate.
8. The rotary electric machine for an internal combustion engine according to claim 5 or 6, wherein the grommet has a plurality of slits (547b, 647b) through which the plurality of lead wires are disposed.
9. The rotating electrical machine for an internal combustion engine according to claim 5 or 6, wherein the grommet has a groove (747c) through which the plurality of lead wires are disposed.
10. A rotor (21) in which a permanent magnet (23) is arranged on the inner surface of a rotor yoke (22) connected to the rotating shaft of the internal combustion engine (12);
    A stator (31) having a stator core (32) which is disposed 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 opposed to the permanent magnet on the radially outer side. )When,
    A rotational position sensor (43) for detecting the rotational position of the rotor;
    A plurality of lead wires (45, 445) for supplying a signal output from the rotational position sensor to the outside;
    A circuit board (42a) having a sensor connection part (42b) to which the rotational position sensor is connected and an external connection part (42c, 442c) to which the plurality of lead wires are connected;
    A case (51) having side walls (52a, 252a) for accommodating the rotational position sensor and defining a container (52) for accommodating the circuit board;
    A sealing resin (56) stored in the container so as to seal the circuit board;
    The side wall is a recess formed so as to extend from the edge (52b) of the opening end of the container to below the surface of the sealing resin, and is arranged so that the lead wire extends through the side wall. A recessed portion (52c),
    Furthermore, the case includes a member (47, 347) that is disposed in the recess and supplements the side wall so that the sealing resin can be stored inside the container. .
11. The rotating electrical machine for an internal combustion engine according to claim 10, wherein the member supplementing the side wall suppresses leakage of the sealing resin.
12. The rotating electrical machine for an internal combustion engine according to claim 10 or 11, wherein the member that supplements the side wall fixes the lead wire.
13. The rotating electrical machine for an internal combustion engine according to any one of claims 10 to 12, wherein the member that supplements the side wall is made of rubber or resin.
14. The rotary electric machine for an internal combustion engine according to any one of claims 10 to 13, wherein a plurality of the lead wires are disposed in the recess so as to extend through the side wall.
15. The plurality of lead wires are arranged so as to intensively extend from lead portions (52c, 47, 347) provided by a member that supplements the concave portion and the side wall. Rotating electric machine for internal combustion engines.
16. The rotary electric machine for an internal combustion engine according to any one of claims 1 to 15, wherein the side wall has a symmetrical shape along a circumferential direction with respect to a rotation axis of the rotor.
17. The rotary electric machine for an internal combustion engine according to any one of claims 1 to 15, wherein the side wall has an asymmetric shape along a circumferential direction with respect to a rotation axis of the rotor.
18. The rotating electrical machine for an internal combustion engine according to claim 17, wherein the asymmetric shape is provided by projecting a part of the side wall in a direction in which the plurality of lead wires extend.
19. The stator includes a coil (33) wound around the stator core,
    The coil can selectively function the rotor and the stator as a generator or an electric motor,
    The rotating electrical machine for an internal combustion engine according to any one of claims 1 to 18, wherein the rotational position sensor detects a rotational position of the rotor for functioning as the electric motor.

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