WO2016194840A1

WO2016194840A1 - Rotating electrical machine

Info

Publication number: WO2016194840A1
Application number: PCT/JP2016/065791
Authority: WO
Inventors: 金光　憲太郎; 誠一水谷
Original assignee: デンソートリム株式会社
Priority date: 2015-05-29
Filing date: 2016-05-27
Publication date: 2016-12-08
Also published as: JPWO2016194840A1; JP6087038B1; CN106464056B; CN106464056A

Abstract

This rotating electrical machine (1) is provided with: a rotor (60) which is supported rotatably and which has a plurality of magnets (62) disposed in a circumferential direction; and a stator (10) which is disposed with a gap of a prescribed distance between the stator (10) and the rotor (60), and which has a core (20) on which a winding portion (50) formed using an aluminum conducting wire is formed. Electrical connection portions (90A, 90B) between end portions (T_B, T_G) of the winding portion (50) and a cable (5) for transmitting power to the outside are disposed in oil or in an atmosphere containing oil.

Description

Rotating electric machine

The present invention relates to a rotating electrical machine, and more particularly to a rotating electrical machine for an internal combustion engine mounted on a vehicle such as a motorcycle.

Generally, a vehicle such as a two-wheeled vehicle includes a generator that generates electric power by using rotation of an internal combustion engine (engine) mounted on the vehicle. The battery is charged with the power generated by the generator, and the power of the electric system of the vehicle is covered by the charged power.

As this generator, a so-called magnet generator as a rotating electric machine is frequently used. This magnet generator includes a rotor with a magnet (rotor) disposed inside the engine cover of the engine, and a stator (stator) disposed radially inward of the rotor. The stator includes a core having a plurality of teeth, and a single-phase or three-phase coil (power generation coil) is wound around the plurality of teeth. The rotor is coupled to one end of the crankshaft of the engine, and the rotor, that is, the magnet rotates as the engine rotates, and a single-phase or three-phase alternating current is induced in the coil by the rotating magnetic field generated by the rotation. This induced current flows from the lead end of the coil to the output lead wire, which is an electric power transmission wire to the outside via the terminal, and is supplied to the electric circuit of the vehicle.

As a connection structure between a lead end of a coil and a terminal constituting a part of an electric power transmission wire to the outside, for example, a structure described in Patent Document 1 is known. In this document, a stator (stator) winding end portion (coil lead end portion) using an aluminum conductor wire is soldered to a metal terminal provided with a terminal block, for example, brass plated with nickel. Are listed.

By the way, such a connection portion between aluminum and brass is in contact with so-called dissimilar metals, and is easily corroded due to an ionization tendency in an electrolyte solution environment such as salt water. For this reason, the protective agent is apply | coated to the soldering part of the connection part mentioned above for corrosion prevention and protection.

In the above-mentioned document, a synthetic resin having a low viscosity such as a polyolefin resin is applied to the connecting portion as an inner protective layer. Further, as the outer protective layer, for example, a synthetic resin having a high viscosity such as an epoxy resin is applied on the inner protective layer.

JP 2013-188048 A

However, in the case of the protective structure of the connection portion between the coil drawing end and the metal terminal using the synthetic resin described above, it is necessary to prepare a plurality of special protective agents. Moreover, in order to apply these plural types of protective agents to the connecting portion, a plurality of application facilities are also required. And the time of the application | coating process and drying process of a protective agent becomes long, and management will also become complicated.

From these, applying a plurality of kinds of protective agents to the connection portion for preventing and protecting the connection portion between the coil drawing end and the metal terminal may increase the cost.

The present invention has been made in view of the above-described problems, and the object of the present invention is to provide a lead-out end portion of a coil and a metal terminal that constitutes a part of an electric power transmission wire to the outside without causing an increase in cost. An object of the present invention is to provide a rotating electrical machine that can prevent corrosion of a connecting portion.

To achieve the above object, a rotating electrical machine according to the present invention is rotatably supported and has a gap of a predetermined distance between a rotor having a plurality of magnets arranged in a circumferential direction. And a stator having a core formed with a winding portion formed of an aluminum conductor, and an electrical connection portion between the end of the winding portion and the electric power transmission wire to the outside is in oil Or, it is arranged in an atmosphere containing oil.

As a result, compared with the conventional protective structure for connecting parts using synthetic resin, corrosion of the electrical connecting part between the end of the winding part and the electric power transmission wire to the outside is not caused without increasing the cost. Can be prevented.

The side view seen from the axial direction of the arrow I shown in FIG. 2 which concerns on embodiment of the magnet type generator as a rotary electric machine of this invention. FIG. 2 is a schematic cross-sectional view taken along the line II-II in FIG. The side view which shows the laminated board which comprises the stator of the magnet type generator which concerns on this embodiment. The perspective view which shows the bobbin division body which comprises one side of the bobbin of a division structure. The fragmentary perspective view explaining the guide groove which guides the lead part of the coil part concerning this embodiment. The fragmentary perspective view explaining the connection part of the lead part of the coil | winding part which concerns on this embodiment, and a terminal. The other partial perspective view explaining the connection part of the lead part of the coil | winding part which concerns on this embodiment, and a terminal. The schematic sectional drawing of the magnet type generator which concerns on other embodiment. (A) is a side view explaining the connection part of the lead part and terminal of the coil | winding part which concerns on other embodiment, (b) is the figure which looked at (a) from the arrow direction. (A) is a side view explaining the lid shape of the connection part of the lead part and terminal of the coil | winding part which concerns on other embodiment, (b) is principal part sectional drawing of Fig.10 (a). (A) is a side view explaining the cover shape of the connection part of the lead part and terminal of the coil | winding part which concerns on other embodiment, (b) is principal part sectional drawing of Fig.11 (a).

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of a magnet generator and its connection mechanism (structure) according to the present invention will be described.

1 to 3 show an outline of the structure of a single-phase magnet generator as a rotating electric machine according to the first embodiment.

Magnet generator 1 (hereinafter simply referred to as “generator”) is attached, for example, in the vicinity of an internal combustion engine (engine) of a motorcycle (not shown), and generates electricity by being rotated by the rotational force of the engine. The generator 1 includes a stator (stator) 10 and a rotor (rotor) 60. The stator 10 and the rotor 60 are arranged so that their central axes O are coaxial, and the stator 10 is fixed to the engine cover 2.

The stator 10 may be attached to the engine housing (not shown). On the other hand, the rotor 60 is fixed to the crankshaft 3.

The engine cover 2 is arranged so as to cover the generator 1. The engine cover 2 is also referred to as a generator case, for example, and is combined with the engine housing to form a mounting space for the generator 1 inside them. That is, in this embodiment, the generator 1 is a generator for two-wheeled vehicles. The electric power generated by the generator 1 is supplied to a vehicle-side electric circuit (not shown).

The stator 10 includes a core 20, a bobbin 30, and a winding part 50. The core 20 is formed by laminating thin metal plates such as iron or electromagnetic steel plates. The core 20 has a substantially annular core body 21 (see FIGS. 2 and 3).

In the following description, for convenience of explanation, the length direction of the virtual central axis O (see FIG. 3) of the core body 21 is referred to as an axial direction AX. Further, a direction radially extending along a cross section orthogonal to the central axis O around the central axis O is referred to as a radial direction RA, and a direction around the core body 21 is referred to as a circumferential direction CR. With the core 20 mounted on the generator 1, the axial direction AX, the radial direction RA, and the circumferential direction CR coincide with the axial direction, radial direction, and circumferential direction of the generator 1, respectively. Hereinafter, the core 20 is demonstrated as what is mounted in the generator 1. FIG.

The core 20 includes a plurality of teeth 22 extending from the core body 21 to the outside in the radial direction RA in addition to the annular core body 21 described above (see FIG. 3). In the present embodiment, twelve teeth 22 are provided at equal intervals in the circumferential direction of the core body 21.

The bobbin 30 is formed in a ring shape with, for example, a resin, and has a divided structure in which the bobbin 30 is divided into two parts in the axial direction. Among these, FIG. 4 shows one bobbin divided body 30A of the divided structure. In the state where the two bobbin divided

bodies

30A and 30B (see FIG. 2) are combined with each other, the bobbin 30 has an annular bobbin body 31, a plurality of insulating portions 32 provided outside the radial direction RA of the bobbin body 31, and bobbins A substantially arc-shaped projecting portion 100 partially projecting from the main body 31 in the radial direction, and a molded body 101 (described later) projecting from the projecting portion 100 in the axial direction AX are integrally provided. In the present embodiment, twelve insulating portions 32 are provided at equal intervals in the circumferential direction CR of the bobbin main body 31.

As shown in FIG. 4, the overhang portion 100 is formed integrally with one bobbin divided body 30A. Two molded bodies 101 are formed so as to protrude in the axial direction AX from a part of the protruding portion 100. A metal plate forming the core 20 shown in FIG. 2 is laminated on the one bobbin divided body 30A, and the laminated body is assembled so as to be sandwiched between the other bobbin divided bodies 30B. At this time, holes AN and AM through which the two molded bodies 101 are penetrated are formed in each metal plate. Thereby, the molded object 101 will be in the state which penetrated the core 20 along the axial direction. Note that the two bobbin divided

bodies

30A and 30B are left and right except for the structure in which the molded body 101 is protruded from one bobbin divided body 30A.

Hereinafter, a description will be given in a state in which one bobbin is configured by assembling two bobbin divided

bodies

30A and 30B.

The bobbin body 31 of the bobbin 30 faces the core body 21, and each of the plurality of insulating portions 32 faces each of the plurality of teeth 22, and the one surface 23 in the axial direction AX of the core 20 so as to sandwich the core 20. It is provided on the side (engine cover 2 side) and the other surface 24 side (crankshaft 3 side).

As shown in FIG. 4, a plate-like stopper 33 extending in the plane direction parallel to the axis of the bobbin main body 31 is formed in the vicinity of the insulating portion 32 of the bobbin main body 31. A plate-like stopper 44 extending in the surface direction parallel to the axis of the bobbin main body 31 is formed at the end of the insulating portion 32 opposite to the bobbin main body 31.

The winding part (power generation coil) 50 is formed of, for example, an aluminum conductor, and is wound around the insulating part 32 of the two bobbins 30. In the present embodiment, one insulation-coated aluminum conducting wire is wound around each of the plurality of insulating portions 32 a predetermined number of times, and a plurality of winding portions 50 are formed on each tooth 22. The insulating portion 32 ensures the insulation between the winding portion 50 and the teeth 22 of the core 20.

In the present embodiment, the winding portion 50 is wound around the insulating portion 32 while being pulled with a predetermined force. Thereby, the winding part 50 can be tightly wound around the insulating part 32. Here, the winding portion 50 is positioned in the radial direction RA by the stopper 44 and the stopper 33 of the bobbin 30.

As shown in FIG. 2, the core body 21 of the core 20 is fixed to the inside of the engine cover 2 with, for example, bolts or the like. A boss 4 is attached to the end of the crankshaft 3 of the engine (not shown). Therefore, the boss 4 rotates together with the crankshaft 3 during engine operation.

Moreover, the rotor 60 is provided outside the radial direction RA of the stator 10 via a predetermined gap. The rotor 60 includes a cylindrical portion 61 that forms an annular shape in the circumferential direction CR, and a wall portion 64 that closes one opening of the cylindrical portion 61 in the axial direction AX. The cylindrical portion 61 and the wall portion 64 are formed integrally with each other, and the boss 4 is fixed to the wall portion 64. A plurality of magnets (permanent magnets) 62 are provided at equiangular intervals along the circumferential direction CR on the inner wall of the cylindrical portion 61. In the present embodiment, a total of twelve magnets 62 are provided so that the directions of their magnetic poles (N pole, S pole) are alternately opposite in the radial direction RA. As shown in FIG. 1, a protrusion 63 is formed on a part of the outer peripheral surface of the cylindrical portion 61.

The wall portion 64 is fixed to the boss 4 so that the cylindrical portion 61 of the rotor 60 is located outside the radial direction RA of the core 20. As a result, the tip of the tooth 22 of the core 20 is positioned to face the magnet 62. The rotor 60 rotates with the crankshaft 3 and the boss 4 during engine operation. When the rotor 60 rotates, an induced electromotive force is generated in the winding part 50 wound around the insulating part 32 covering the teeth 22 facing the magnet 62. As a result, a current is generated in the winding part 50. The current generated in the winding part 50 is supplied to an electric load such as a battery of a two-wheeled vehicle or a headlamp via an output cable 5 (see FIG. 2) that connects the winding part 50 and the vehicle-side electric circuit. . Thus, the generator 1 of this embodiment is an outer rotor type generator.

The rotation sensor 70 is provided outside the radial direction RA of the rotor 60 via a predetermined gap. The rotation sensor 70 outputs a signal corresponding to the rotation position of the protrusion 63 when the rotor 60 rotates. The signal is transmitted to an electronic control unit (hereinafter referred to as “ECU”) (not shown) via the wire harness 71. Thereby, the ECU can detect the rotational position of the rotor 60, that is, the rotational position of the crankshaft 3.

Next, in the generator 1,

electrical connection portions

90A and 90B between the end portion of the winding portion 50, the output cable 5, and a ground wire (not shown) will be described.

Since the generator 1 according to the present embodiment is a single-phase AC generator, the 12 winding portions 50 wound around the 12 teeth are electrically connected directly to each other on the vehicle side. Connected to electrical circuit. Therefore, both ends of the series circuit of the winding portions 50, that is, ends of the winding start and winding end portions of the twelve winding portions 50, that is, the battery side and ground side lead portions T _B and T _G Is connected to an output cable 5 and a ground wire which are electric power transmission wires to the outside. The output cable 5 is connected to the vehicle-side electrical circuit, and the ground wire is connected to the vehicle-side ground circuit.

As shown in FIGS. 1 and 2, these connection portions 90 </ _b > A and 90 </ _b > _B have a structure for separately connecting the battery side and ground side lead portions T _B and _TG of the plurality of winding portions 50. These connecting

portions

90A and 90B are arranged by penetrating predetermined positions of both side surfaces of the core 20, that is, the surface 23 on the engine cover 2 side and the surface 24 on the crankshaft 3 side in the axial direction AX. In the case of this embodiment, this penetration position is set at a portion closest to the lead portions T _B and _TG of the plurality of winding portions 50.

These connecting

portions

90A and 90B are fixed to the core 20 in a state of penetrating the core 20 along the axial direction AX, and are formed of a resin molded body 101 (integrated with the bobbin divided body 30A) having a through hole HL. 4), and is press-fitted into the through hole HL of the molded body 101, and is disposed in a fixed state in the through hole HL leaving both

end portions

122, 123, 142 outside the core 20.

Terminals

102 and 104 which are intermediate connection members.

Of the end portions 122 and 123 of the battery side terminal 102, the lead portion T _B of the output side of the plurality of winding portions 50 are electrically connected by welding to one end portion 122 which is located on the side of the engine cover 2, A copper output cable 5 connected to the battery is electrically connected to the other end 123 located on the crankshaft 3 side by soldering.

In addition, the ground side lead portions _TG of the plurality of winding portions 50 are electrically connected to one end portion 142 located on the engine cover 2 side of the both end portions 142 of the ground side terminal 104 by welding, A ground wire (not shown) connected to a ground circuit on the vehicle side is electrically connected to the other end (not shown) located on the crankshaft 3 side by soldering.

The connection direction perpendicular to the axial direction AX of the output side of the lead portion _{T B} and the ground side of the lead portion _{T G} is the core 20, i.e. extends parallel to the projecting portion 100 of the bobbin divided body 30A to the terminal 102, 104 Is done. Further, as shown in FIG. 1, the connection portions 90 </ b> A and 90 </ b> B face the direction in which the connection surface direction SD is orthogonal to the rotation direction tangent TL of the rotor 60.

As shown in FIG. 4, the molded body 101 is integrally formed with the overhanging portion 100 of the bobbin divided body 30 </ b> A and penetrates and is fixed at a predetermined position of the core 20. As shown in FIG. 5, the molded body 101 is formed with a through hole HL along its length direction. Further, as shown in FIGS. 5 to 7, a projection 112A having a wall-like structure is formed outside the radial direction RA of the

terminals

102 and 104 on the surface of the projecting portion 100 opposite to the molded body 101. . The protrusion 112A functions as a screen for preventing coil collapse.

Further, a substantially circular rising wall 112B is formed around the

end portions

122 and 142 of the

terminals

102 and 104, and the internal space surrounded by the rising wall 112B has a pool-like structure.

The overhanging portion 100 adjacent to the protrusion 112A is provided with a protruding portion 112D protruding in the axial direction AX, and the protruding portion 112D is provided with a guide groove 112C whose end direction is a connecting portion between the lead portion and the terminal. Thus, the connecting portion between the lead portion and the terminal is positioned in the radial direction and the axial direction. Further, the projection 112D can prevent a welding electrode (not shown) from contacting the core 20 and the bobbin 30.

Furthermore, a second protrusion 112E having a wall-like structure is provided adjacent to the guide groove 112C. The second protrusion 112E can be used as a guide when the lead portion of the winding portion 50 is pulled and bent.

A plurality of winding portions 50, the battery-side and ground-side lead portion T _B at the end winding start and the winding at both _ends, and a T _G. These lead portions T _B and _TG are covered with an insulating film, but are made of aluminum like the winding body. These lead portions T _B and _TG are drawn out from the group of winding portions 50, and are accommodated and guided in guide grooves 112C formed in the overhanging portion 100 of the core 20, as shown in FIG. For example, the end 122 for welding of the battery side terminal 102 is located in the through hole HL. Thus, this end 122, and along bend the tip of the battery-side lead portion T _B which has been guided, to connect both by welding. The welding is, for example, resistance welding, and Joule heat due to the current concentrated on the end portion 122, by the application of pressure to the lead portion T _B and the end portion 122, both are welded together (see FIG. 6). Although not shown in detail, the connection between the ground side terminal 104 and the ground side lead portion _TG is similarly performed.

As a material for the

terminals

102 and 104, a metal other than aluminum such as iron or copper is generally used in consideration of soldering with the output cable 5 or the like.

Incidentally, a motorcycle engine to which the present invention is applied includes a lubrication device. The lubrication device, for example, pumps engine lubrication oil stored in an oil pan disposed at the bottom of the engine to the sliding contact portion of each part of the engine via an oil flow path using an oil pump. The engine lubricating oil that has lubricated the sliding contact portion naturally falls in the engine and returns to the oil pan.

Also, a part of the engine lubricating oil stored in the oil pan also flows into the engine cover 2 and collects at the bottom. The engine cover 2 is configured to prevent the lubricating oil from flowing out of the engine even though it forms a flow path for the lubricating oil. As shown in FIGS. 1 and 2, the liquid level OL of the engine lubricating oil in the engine cover 2 when the engine is stopped is set to such a height that the lower part of the cylindrical portion 61 constituting the rotor 60 is immersed.

Thus, according to the rotating electrical machine of the present embodiment, various effects can be obtained as follows.

When a metal other than aluminum, such as iron or copper, is used as the material of the

terminals

102 and 104, the welded portion with aluminum is in contact with different metals, and is extremely susceptible to corrosion in a corrosive environment. By combining the engine cover 2 and the engine housing, the mounting space of the generator 1 formed therein is a corrosive environment into which exhaust gas containing corrosion factors flows.

The exhaust gas may contain fuel-derived sulfur components and alcohol. In addition, the exhaust gas may contain moisture generated by the combustion of fuel. And this water | moisture content adheres to the engine cover 2, it may be cooled, and dew condensation may occur. A highly corrosive substance is generated by dissolving sulfur components and the like in the condensed water. For example, sulfuric acid etc. are mentioned. Therefore, from these viewpoints, it can be said that the connecting

portions

90A and 90B are exposed to a corrosive environment.

In the rotating electrical machine of this embodiment, when the engine rotates, the rotor 60 also rotates accordingly. As the rotor 60 rotates, the engine lubricating oil accumulated in the inner bottom portion of the engine cover 2 is swept up by the cylindrical portion 61 of the rotor 60, and the atmosphere including the splash of the engine lubricating oil in the engine cover 2; Fill with so-called oil mist.

Engine by the oil mist in the engine cover 2 is attached to the connecting portion 90A, for example the end portion 122 of the battery side terminal 102 and the leading end of the output-side lead portion T _B, coating the connection portion 90A in the engine lubricating oil Lubricating oil serves as a protective agent to prevent corrosion of the connecting portion 90A. That is, the connecting portion 90A is directly wetted by the splash of engine lubricating oil contained in the atmosphere surrounding the connecting portion 90A. The connecting portion 90A is insulated from the corrosion factor by covering the connecting portion 90A with the engine lubricating oil. The same applies to the connection portion 90B of the ground lead portion _TG (the same applies hereinafter).

The oil mist also adheres to the wall-shaped protrusion 112A and the second protrusion 112E arranged in the vicinity of the connecting portion 90A, and the attached oil mist travels through the guide groove 112C formed in the protruding portion 112D. Guided to 90A to prevent its corrosion. It is more preferable that the protrusion 112A and the guide groove 112C are disposed on the radially outer side with respect to the connecting portion 90A, and oil mist can be captured effectively. Further, the protrusion 112A and the guide groove 112C are more preferably disposed on the upper side in the direction of gravity, that is, the top side when the generator 1 is mounted on the engine of the two-wheeled vehicle. Can lead.

Further, there is disposed a lead portion T _B in the guide groove 112C, since the lead portion T _B easy to wet with engine lubricating oil, engine lubricating oil is transmitted to the lead portion T _B, the guide grooves 112C and the lead portions by traveling through the gap formed between the T _B, it is easy to tell toward the connecting portion 90A. That is, it can be said that the connecting portion 90A is indirectly wetted by the oil for engine lubrication closely contacting the connecting portion 90A.

Furthermore, a substantially circular rising wall 112B is formed around the end portion 122 of the terminal 102, and the internal space surrounded by the rising wall 112B has a pool-like structure. Mist is guided. The oil mist guided to the internal space of the rising wall 112B remains in the internal space even if the engine stops rotating, and is guided to the connecting portion 90A by the surface tension with the connecting portion 90A to prevent corrosion.

As described above, for example, connecting portions 90A of the tip end 122 and the lead portion T _B of the terminal 102 corrosion is prevented by the engine lubricating oil. Further, the engine lubricating oil can be effectively attached to the connecting portion 90A by starting the engine. When the engine is stopped, the engine lubricating oil can be supplied to the connecting portion 90A by the pool-like structure of the rising wall 112B. As described above, since the oil for engine lubrication can be supplied to the connecting portion 90A by a plurality of means, the occurrence of corrosion of the connecting portion 90A can always be suppressed regardless of the operating state of the engine. is there.

As described above, it is possible to prevent corrosion of the connection portion between the end portion of the terminal and the tip portion of the lead portion without causing an increase in cost as compared with the conventional protective structure of the connection portion using synthetic resin.

In the above-described embodiment, the engine lubricating oil is attached to the connecting portion 90A by rotating the rotor 60 and scooping up the engine lubricating oil in the engine cover 2, but for example, although not shown in detail Alternatively, a structure may be used in which the engine cover 2 or the crankshaft 3 is provided with an oil flow path and a nozzle opening that opens toward the connecting portion 90A, and the engine lubricating oil is injected toward the connecting portion 90A.

Further, by directing the connection surface direction SD of the connection portion between the end portion of the terminal and the tip of the lead portion in a direction orthogonal to the rotation direction tangent TL of the rotor 60, the welding operation of the connection portion is facilitated.

Moreover, since the aluminum conductor is used for the wire forming the plurality of winding portions 50 of the stator (stator) 10, the generator itself can be made lighter and the parts cost can be significantly higher than the case where the copper wire is used. Can be reduced.

In addition, since the lead portions T _B and _TG drawn from the plurality of winding portions 50 are made of aluminum, it is preferable to connect to the

terminals

102 and 104 by welding instead of soldering.

Furthermore, since the welding and soldering parts are isolated from each other with the core 20 in between, spatter adheres to the solder part, and damage to the welded part due to the soldering work is remarkably reduced. As a result, the reliability of electrical bonding at the bonding site is increased.

Further, a projection 112A having a wall-like structure or a second projection is formed on the surface of the overhang portion 100 of the bobbin divided body 30A opposite to the molded body 101, that is, between the end portion 122 of the terminal 102 and the winding portion 50, for example. A protrusion 112E is formed. The protrusions 112A and the second protrusions 112E prevent spatter scattered during welding from adhering to the winding portion 50 of the stator 10.

In the above embodiment, connect the battery-side lead portion T _B of the winding portion 50 in the engine cover 2 side, but to perform the connection to the battery at the crank shaft 3 side, another embodiment of the present invention As shown in FIG. 8, which is a form, this positional relationship may be reversed. That is, the head portion of the molded body 101 may be positioned on the other surface 24 side of the core 20, and the tail portion of the molded body 101 may be positioned on the one surface 23 side. Accordingly, the direction of the terminal 102 is also reversed. This increases the degree of design freedom.

Further, by arranging the connecting portion 90A toward the wall portion 64 side of the axial AX rotor 60, the engine lubricating oil is easily applied to the connecting portion 90A. That is, the engine lubricating oil is further lifted up by the surface tension (energy) of the wall portion 64 of the rotor 60, and the engine lubricating oil is also formed by the convex portions such as the rivets 151 and the holes 152 provided in the wall portion 64. Is more fried.

Furthermore, in the above embodiment, as shown in FIG. 1, the example in which the connecting

portions

90A and 90B are arranged on the center line of the teeth is shown. The

portions

90A and 90B may be arranged.

Further, in the above embodiment, the end of the lead portion that has been guided is bent along the welding end portion of the terminal, and both of them are welded, but in yet another embodiment of the present invention, As shown in FIGS. 9A and 9B, an end 162 of the terminal 106 is provided with a caulking groove 163, and the tip of the lead portion T is guided and fixed in the groove 163. May be attached.

As in the above embodiment, a wall-like projection 112A is formed outside the terminal 106 in the radial direction RA, and a guide groove 112C for positioning the lead portion T is provided on the projection 112A. Further, a substantially circular rising wall 112B is formed around the terminal 106, as in the above embodiment, and the internal space surrounded by the rising wall 112B has a pool-like structure.

In the above embodiment, an example in which the substantially circular rising wall 112B is formed around the end portion 122 of the terminal 102 and the internal space surrounded by the rising wall 112B has a pool-like structure is shown. In yet another embodiment, as shown in FIGS. 10A and 10B, a lid 112F is provided on the rising wall 112B so as to cover a part of the opening in the axial direction AX side of the pool-like structure. Also good. In addition, it is preferable that the lid 112 </ b> F can store the engine lubricating oil efficiently if it is disposed on the lower side in the gravity direction of the pool-like structure. Further, new engine lubricating oil can be supplied to the internal space of the pool-like structure from the upper opening of the pool-like structure where the lid 112F is not provided.

In the case of forming the rising wall 112B and the lid 112F constituting a pool-like structure together, so as not to interfere with the end 122 of the pin 102 during assembly, and the connection of the end portion 122 and the lead portion T _B It is desirable that the lid 112F is formed at a low position on the lower side in the gravity direction of the pool-like structure so as not to obstruct.

On the other hand, as shown in FIGS. 11 (a) and 11 (b) which is still another embodiment of the present invention, when the rising wall 112B and the lid 112F constituting the pool structure are formed separately, as described above. , because does not or getting in the way of assembling when connecting the interference or lead portion T _B to the terminal 102 of the can cover the axial AX-side opening of the pool-like structure in a wider range, pool shape More engine lubricating oil can be stored in the internal space of the structure. And as a method of fixing the rising wall 112B and the lid 112F, for example, it is conceivable to provide a snap fit on both of them or to bond them together, but it is not particularly limited to these methods, Any known technique is applicable. In the other embodiments of the present invention, the same reference numerals used in the drawings among the reference numerals used in the drawings represent the same components as in the above embodiments unless otherwise indicated. .

In the above embodiment, welding is shown as a connection method between the terminal and the lead portion. However, this welding includes connection with an alloy layer and connection with a metallurgical diffusion layer. Moreover, the welding method can be provided by various methods, for example, projection welding, arc welding, etc. are used. Furthermore, as other connection methods, for example, there are caulking, soldering, fusing (heat caulking) and the like. From the viewpoint of corrosion protection of the electrical connection part, which is the gist of the present invention, these connection methods are naturally also included. It is included.

Furthermore, those in the above embodiment, the axial direction AX height of the rising wall 112B constituting the pool-like structure, in consideration of the workability in connecting the end portion 122 and the lead portion T _B, lower than the connecting portion 90A However, if the rising wall 112B is provided separately from the bobbin main body 31, like the lid 112F of the other embodiments described above, the height may be higher than the connecting portion 90A. Is possible. The height AX of the rising wall 112B in the axial direction can be adjusted as appropriate according to the shape of the connecting portion 90A and the viscosity of the engine lubricating oil.

And in the said embodiment, although the generation | occurrence | production of the corrosion of this connection part is suppressed by covering a connection part with the oil for engine lubrication, an oil for engine lubrication and other means, for example, synthetic resin, are used to connect a connection part. You may suppress generation | occurrence | production of the corrosion of a connection part in combination with covering. In this case, two types of synthetic resins that have conventionally been required can be made into one type, and the cost can be reduced, and the risk of scientific decomposition of the synthetic resin and engine lubricating oil can be reduced. . Further, instead of the synthetic resin, a coil fixing adhesive or a core rust preventive material may be used, and these may be combined with an engine lubricating oil to suppress the occurrence of corrosion at the connection portion.

In yet another embodiment of the present invention, although not shown in detail, the rotor may be provided inside the stator. In this case, the rotating electrical machine can be used as an inner rotor type generator or motor.

Furthermore, in another embodiment of the present invention, the rotating electrical machine may be configured to fix the rotor and rotate the stator relative to the rotor. Thus, the present invention is not limited to the above-described embodiments, and can be applied to various forms without departing from the gist thereof.

1 Rotating electric machine (magnet generator)
5 Output cable (electrical power transmission cable)
DESCRIPTION OF SYMBOLS 10 Stator 20 Core 50 Winding part 60

Rotor

90A, 90B Electrical connection part 102,104 Terminal (intermediate connection member)
112A Protrusion (wall-like structure)
112B Standing wall (pool-like structure)
112C guide groove _T B, _{T G} lead portion (the end portion of the winding portion)
SD Connection surface direction TL of electrical connection Rotation direction tangent of rotor

Claims

A rotor (60) rotatably supported and having a plurality of magnets (62) arranged in a circumferential direction;
A stator (10) having a core (20) disposed with a gap of a predetermined distance between the rotor (60) and having a winding part (50) formed of an aluminum conductor. In the rotating electrical machine (1),
The electrical connection portions (90A, 90B) between the end portions (T B , T G ) of the winding portion (50) and the electric power transmission wire (5) to the outside are placed in oil or in an atmosphere containing oil. A rotating electric machine (1) characterized by being arranged.
The rotating electrical machine (1) according to claim 1, wherein the oil is an oil for engine lubrication.
The ends (T B , T G ) of the winding part (50) and the electric power transmission wire (5) to the outside are electrically connected by an intermediate connection member (102, 104), and the electrical connection is made. Part (90A, 90B),
The rotating electrical machine (1) according to claim 1 or 2, wherein the intermediate connecting member (102, 104) is formed of an iron-based or copper-based member having electrical conductivity.
The rotating electrical machine according to claim 3, wherein the connection surface direction (SD) of the electrical connection portions (90A, 90B) is oriented in a direction perpendicular to the rotational direction tangent (TL) of the rotor (60). (1).
The rotating electrical machine (1) according to claim 3 or 4, wherein a wall-like structure (112A) is provided on the outside in the radial direction (RA) of the electrical connection portion (90A, 90B).
In the vicinity of the electrical connection portion (90A, 90B), the guide groove of the end portion (T B , T G ) of the winding portion (50) whose end direction is the electrical connection portion (90A, 90B) The rotating electrical machine (1) according to any one of claims 3 to 5, further comprising (112C).
The rotating electrical machine (1) according to any one of claims 3 to 6, wherein a pool-like structure (112B) is formed around the electrical connection portion (90A, 90B) to surround the connection portion. .
The rotor (60) includes an annular tube portion (61) and a wall portion (64) that closes one opening in the axial direction (AX) of the tube portion (61), and the electrical connection portion (90A). The rotating electric machine (1) according to any one of claims 3 to 7, wherein the rotating electric machine (90B) is arranged in the axial direction (AX) toward the wall (64).