JP4399439B2 - In-vehicle rotary electric machine - Google Patents

Description

  The present invention relates to a vehicle-mounted rotating electrical machine that is mounted in an engine room of a car.

  Conventionally, an inverter unit (a stator current switching circuit constituted by an inverter bridge) for inverter control of a rotating electrical machine has been installed separately from the rotating electrical machine. On the other hand, an in-vehicle rotating electrical machine that integrates the rotating electrical machine and the inverter unit has been proposed in order to reduce the loss between the rotating electrical machine and the inverter unit, reduce the cost and weight by eliminating wiring, and improve the mountability to the vehicle. ing.

  Since such a vehicle-mounted rotating electrical machine is disposed near the internal combustion engine in the engine room, the temperature environment is severe due to heat received from the internal combustion engine and heat generated by the rotating electrical machine itself. For this reason, in patent document 1, in order to ensure the heat dissipation of the power element (switching element) which is a heat generating body of the inverter unit, the power elements of the upper arm and the lower arm of each phase are respectively attached to the heat sink without an insulator. Has been proposed.

Japanese Patent Laying-Open No. 2005-348494 (FIG. 1 and description thereof)

  However, if a rotating electrical machine having the same performance is to be commonly applied to a plurality of vehicle types, it is necessary to change the mounting position of the rotating electrical machine depending on the arrangement of components in the engine room depending on the vehicle type. Especially when it is necessary to change the position of the battery output terminal taken out from the rotating electrical machine or the control connector from the in-vehicle ECU (electronic control unit), not only the terminal but also the internal components such as the heat sink are changed. In this case, different parts are required for each vehicle model with the same performance, and there are problems such as an increase in cost and a tendency for different parts to be easily mixed during production.

  The present invention has been made in view of the above-described circumstances. Even when the rotating electrical machine is commonly applied to a plurality of vehicle types, cost reduction and productivity can be achieved by sharing parts in the rotating electrical machine. The purpose is to improve the above.

  A vehicle-mounted rotating electrical machine according to the present invention includes a rotatable rotor having field windings, and a stator having armature windings of n (where n is a natural number) phase disposed around the rotor. And a bracket that supports the rotor and the stator, and an inverter bridge that controls a stator current with a DC terminal connected to a battery and an AC terminal connected to the armature winding of each phase. The rotating electrical machine includes 2n heat sinks that are fixed to the bracket and individually cool the high-potential side arm and the low-potential side arm of each phase of the inverter bridge, and are used to connect the battery and the inverter bridge. A battery connection portion is provided on at least two heat sinks, and each of the battery connection portions has the same position on the heat sink in which each is provided. And it is characterized in and.

  The present invention relates to a rotatable rotor having field windings, a stator having armature windings of n (where n is a natural number) phase disposed around the rotor, the rotor, In a vehicle-mounted rotating electrical machine comprising: a bracket that supports the stator; and an inverter bridge that has a DC end connected to a battery and an AC end connected to the armature winding of each phase and controls a stator current. And 2n heat sinks that individually cool the high-potential side arm and the low-potential side arm of each phase of the inverter bridge, and a battery connection portion used for connecting the battery and the inverter bridge is at least Provided in two heat sinks, and each of the battery connection portions has the same position in the heat sink in which each is provided. Even if the mounting position of the rotating electrical machine changes depending on the model and the placement of the parts in the engine room, the connection between the rotating electrical machine and the battery can be changed without changing the components of the rotating electrical machine. Can be done easily.

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to FIGS. 1 is a connection diagram showing an example of a schematic circuit configuration of an in-vehicle rotary electric machine, FIG. 2 is a longitudinal side view showing an example of a cross-sectional structure of a side surface of the in-vehicle rotary electric machine, and FIG. 3 is a main part of the in-vehicle rotary electric machine. FIG. 4 is a perspective view showing an example of a heat sink pair for one phase, and FIG. 5 is a perspective view of an exploded view of an example of a heat sink pair for one phase. FIG. 6 is a side view showing an example of an upper arm heat sink which is a high potential side arm. In addition, in each figure, the same code | symbol shows the same part.
Embodiment 1 of the present invention will be described. FIG. 1 shows the mounting state of the heat sink group on the rotating electrical machine, and FIGS. 2, 3, and 4 show the shape of the heat sink group of the present embodiment.

  First, an example of a schematic circuit configuration of an in-vehicle rotary electric machine will be described with reference to FIG.

  In FIG. 1, an in-vehicle rotating electrical machine main body 1 includes an armature winding 16a wound around a stator and a field winding 14 wound around the rotor. Phase (U-phase, V-phase, W-phase) coils are Y-connected (star-connected). The coil connection may be connected by a Δ (delta) connection.

  A power element unit 4 that is a stator current switching circuit configured by an inverter bridge includes a plurality of switching elements (power transistors, MOSFETs, IGBTs, etc.) 41 that are power elements, and a diode 42 that is connected in parallel to each switching element 41. The inverter bridge 40 is said to be an inverter module made up of and a smoothing capacitor 43 connected in parallel to the inverter bridge 40.

  In the inverter bridge 40, two sets of a switching element 41a and a diode 42 constituting an upper arm (high potential side arm) 46 and a switching element 41b and a diode 42 constituting a lower arm (low potential side arm) 47 are connected in series. The set is configured as one set, and the set is arranged in parallel for three phases (U phase, V phase, W phase).

  The end of each phase of the Y connection of the armature winding 16a is an intermediate point between the switching element 41a of the upper arm 46 and the switching element 41b of the lower arm 47 arranged in series in each phase of UVW via the AC wiring 9. Are electrically connected to each other.

  Further, the positive electrode side terminal and the negative electrode side terminal of the battery 5 are electrically connected to the positive electrode side and the negative electrode side of the inverter bridge 40 via the DC wiring 8, respectively. In the inverter bridge 40, the switching operation of each switching element 41a, 41b is controlled by a command from the control circuit 44. Further, the control circuit 44 controls the field current control circuit 45 to adjust the field current that flows through the field winding 14 of the rotor.

  In the rotating electrical machine 1 including the power element unit 4 as described above, DC power is supplied from the battery 5 to the power element unit 4 via the DC wiring 8 when the engine is started. Then, the control circuit 44 performs ON / OFF control of the switching elements 41a and 41b of the inverter bridge 40, and the DC power is converted into three-phase AC power. Then, this three-phase AC power is supplied to the armature winding 16 a of the rotating electrical machine 1 through the AC wiring 9. Thereby, a rotating magnetic field is applied around the field winding 14 of the rotor to which the field current is supplied by the field current control circuit 45, the rotor of the rotating electrical machine 1 is driven to rotate, and the pulley for the rotating electrical machine. The engine is started via the belt, crank pulley, and clutch (ON).

  On the other hand, when the engine is started, the rotational power of the engine is transmitted to the vehicle-mounted rotating electrical machine main body 1 via the crank pulley, the belt, and the rotating electrical machine pulley. Thereby, the rotor of the vehicle-mounted rotary electric machine main body 1 is driven to rotate, and a three-phase AC voltage is induced in the armature winding 16a. Therefore, the control circuit 44 performs ON / OFF control of each switching element 41, converts the three-phase AC power induced in the armature winding 16a into DC power, and charges the battery 5.

  Next, an example of the cross-sectional structure of the side surface of the vehicle-mounted rotating electrical machine will be described with reference to FIG.

  In FIG. 2, the in-vehicle rotating electrical machine main body 1 includes a case composed of a front bracket 10 and a rear bracket 11, a shaft 13 that is rotatably disposed in the case via a support bearing 12, and a shaft 13. A rotor 15 that is fixed and has a field winding 14; a stator 16 that is fixed to the case so as to surround the rotor 15 and that has an armature winding 16a; A fan 17 fixed to both end faces in the axial direction, a pulley 18 fixed to the front end of the shaft 13, and a brush holder 19 attached to the rear bracket 11 so as to be positioned on the rear outer periphery of the shaft 13. And a pair of brushes 20 disposed in the brush holder 19 so as to be in sliding contact with a pair of slip rings 21 mounted on the rear side of the shaft 13. , And a rotation disposed on the rear side edge position detecting sensor (resolver) 22 of the shaft 13.

  The in-vehicle rotating electrical machine main body 1 is connected to a rotating shaft (not shown) of the engine via a pulley 18 and a belt (not shown).

  In the first embodiment, the power element unit 4 is installed integrally with or close to the in-vehicle rotary electric machine main body 1. That is, in the space between the case 30 and the rear bracket 11 disposed on the rear side of the rear bracket 11, a plurality of switching elements 41 a and 41 b constituting the power element unit 4 and the inside connected to each switching element 41. A heat sink 50 and an outer heat sink 51 are installed on the outer surface of the rear bracket 11 via a support (not shown). A control circuit board 44 a on which the control circuit 44 described above is mounted is disposed outside the case 30. A control circuit board 44 a on which the control circuit 44 is mounted is integrally attached to the in-vehicle rotary electric machine main body 1 through the case 30. In many cases, the control circuit board 44a on which the control circuit 44 is mounted is directly attached to the rear bracket 11 of the in-vehicle rotating electrical machine main body 1 via the case 30. In some cases, it may be attached indirectly.

  Further, the case 30 and the rear bracket 11 are provided with ventilation holes 31a and 31b. By the rotation of the fan 17 of the rotor 15, an air path as shown by an arrow F is formed and passes through the inside of the case 30, thereby switching elements. 41a, 41b, the inner heat sink 50, the outer heat sink 51, the control circuit 44 on the control circuit board 44a, and the like are cooled.

  The power unit 4 is divided into U, V, and W three-phase parts (U-phase part 60, V-phase part 70, and W-phase part 80). Each part has an inner heat sink that is a pair of heat sinks. 50 and the outer heat sink 51 are mounted. The inner heat sink 50 is provided with a switching element 41a (shown in white) on the upper arm (high potential side arm). The switching elements 41a1,... 41an are arranged in parallel in the circumferential direction and are arranged in parallel in the circuit. Similarly, the outer heat sink 51 has a lower arm (low potential side arm). ) Is mounted, and the switching element 41b is arranged in parallel in the circumferential direction of the in-vehicle rotating electrical machine main body 1 as shown in the drawing and is parallel in circuit. The switching element 41b1,... 41bn is composed of four (that is, plural) switching elements 41b1,.

Further, the U-phase part 60, the V-phase part 70, and the W-phase part 80 are arranged around the rotary shaft 13 from the rotary shaft 13 so as to surround the rotary shaft 13 of the in-vehicle rotary electric machine body 1 as shown in the figure. They are located at approximately the same distance in the radial direction, and are located on the same plane orthogonal to the rotating shaft 13.
In other words, the inner heat sink 50, the outer heat sink 51, and the switching elements 41a and 41b of the U-phase portion 60, the inner heat sink 50, the outer heat sink 51, and the switching elements 41a and 41b of the V-phase portion 70, The inner heat sink 50, the outer heat sink 51, and the switching elements 41a and 41b of the W-phase portion 80 are arranged around the rotary shaft 13 so as to surround the rotary shaft 13 of the vehicle-mounted rotating electrical machine main body 1 as illustrated. The rotary shafts 13 are located at substantially equal distances in the radial direction, and are located on the same plane orthogonal to the rotary shaft 13.

  The in-vehicle rotating electrical machine main body according to the present embodiment includes a rotor 15 that is rotatably arranged and a stator 16 that is disposed around the rotor 15 and has an armature winding 16a. Each phase U, V, W has an inverter bridge having a pair of switching circuits constituting at least an upper arm (high potential side arm) 46 and a lower arm (low potential side arm) 47, and constitutes each switching circuit. A heat sink pair provided with a heat sink for cooling the switching element is arranged for each phase.

  Next, FIGS. 4, 5 and 6 will be mainly described.

  For example, n-type MOS FET switching elements are used as the switching elements 41a and 41b.

  In the heat sink pair, one heat sink 50 is connected to the drain terminal D of the switching element 41a of the upper arm 46 (B potential which is a battery potential), and the other heat sink 51 is connected to the drain terminal D of the switching element 41b of the lower arm 47 ( The heat sinks 50 and 51 are electrically insulated from each other.

  The two heat sinks 50 and 51 are electrically insulated by an insulating bush 5051 illustrated in FIG. That is, the insulation bush 5051 is fitted into the through hole 50h1 provided at one end of the heat sink 50 and the through hole 51h1 provided at one end of the heat sink 51, whereby electrical insulation between the heat sinks 50 and 51 is performed. .

The heat sink 50 is connected to the positive terminal of the battery 5 through a battery connection portion 501 having a B potential having a fixing hole 501h and a battery cable (not shown). A battery terminal (not shown) for connecting the battery cable is attached to the fixing hole 501h of the battery connection portion 501.
Each phase heat sink 51, 51, 51 of A potential is connected to each phase U, V, W of the armature winding 16a via a stator connection portion 5116 of A potential and a connecting conductor 16C.

  The heat sinks 50, 50, 50 of the upper arm of each UVW phase are mechanically and electrically coupled with bolts at connection portions 502 that project radially symmetrically at both ends of each heat sink 50, 50, 50. Since the seismic strength is enhanced by adopting a structure, and since these heat sinks 50, 50, 50 are all electrically connected, they are all substantially the same potential (B potential that is the same potential as the battery voltage). It has become. A point at which the bolt is coupled at the connection portion 502 is illustrated as a connection point 502P.

The heat sinks 50, 50, 50 of the upper arms of each UVW phase are so-called identical parts (see FIG. 3) having substantially the same shape and size.
Also, the heat sinks 51, 51, 51 of the lower arm of each UVW phase are so-called identical parts having substantially the same shape and size.
In other words, the heat sink pairs 50, 51, 50, 51, 50, 51 of each phase are also so-called identical parts (see FIG. 3) having substantially the same shape and size.

Control terminals GH and GL for turning on and off the switching elements 41a and 41b are output from the heat sink pairs 50, 51, 50, 51, 50, and 51 of each phase. The control terminals GH and GL It is connected to the control circuit 44.
The switching element may be a P-type MOS FET or IGBT.

  As shown in FIG. 1, in this embodiment, the number of phases of the armature winding is three. Since it can be manufactured with the minimum number of phases by configuring with three phases, the number of parts can be reduced and the cost can be reduced.

The battery connection portion 501 is provided in each of the heat sinks 50, 50, 50 of each phase, and each of the battery connection portions 501, 501, 501 has the same position in the heat sink in which each is provided. Yes (see FIG. 3).
Therefore, since the battery connection part to which the battery terminal is connected can be selected depending on the mounting position of the vehicle-mounted rotating electrical machine body in the internal combustion engine or the engine room, the heat sink can be selected depending on the type of the vehicle to which the vehicle-mounted rotating electrical machine body is mounted. There is no need to change, and costs can be reduced by sharing parts, and productivity is improved by sharing production facilities and improving assembly.

  The heat sink pairs 50, 51, 50, 51, 50, 51 of each phase are provided with a rear terminal 52 made of insulating resin and a front terminal 53 made of insulating resin on both sides in the longitudinal direction of the rotation axis. A gate connection terminal GH (connected to the control circuit 44) of the upper arm (high potential side arm) is provided at the center of each rear side terminal 52, and a lower portion is provided at one end of each front side terminal 53. A gate connection terminal GL (connected to the control circuit 44) of the arm (low potential side arm) is provided.

  In addition, a conductive plate 531 is provided on the front side surface of each front terminal 53 facing the rear bracket 11, and the switching element 41 b of the lower arm (low potential side arm) is provided via the conductive plate 531. Is connected to the rear bracket 11 having a ground potential.

  Further, the rear terminal 52 made of insulating resin and the front terminal 53 made of insulating resin are bolted together with the heat sinks 50 and 51 at the bolting positions BC1 and BC2 in FIG. 5, and these parts are fixed to the rear bracket 11. Is done. In this fixed state, the insulating resin rear terminal 52 and the insulating resin front terminal 53 face the switching elements 41 a and 41 b mounted on the heat sinks 50 and 51.

Embodiment 2. FIG.
Hereinafter, Embodiment 2 of the present invention will be described with reference to FIG. 7 which is a plan view of another example of the mounting portion of the heat sink group, which is the main part of the vehicle-mounted rotating electrical machine, as viewed from the rear side.

In the second embodiment of the present invention, as shown in FIG. 7, the heat sink 50 in the U-phase portion 60 does not have the battery connection portion 501 and is selectively used for the other two-phase heat sinks 50 and 50. The battery connection parts 501 and 501 are provided, and there is a certain effect even if the battery connection part 501 is not necessarily provided in the heat sink 50 of all phases.
Others are the same as those in the first embodiment of the present invention described above, and the description thereof is omitted. In FIG. 7, the same or corresponding parts as those in FIGS.

Embodiment 3 FIG.
Hereinafter, Embodiment 3 of the present invention will be described with reference to FIG. 8 which is a plan view of another example of the mounting portion of the heat sink group, which is the main part of the in-vehicle rotary electric machine, as viewed from the rear side.

  In the present embodiment, as shown in FIG. 8, the battery terminal can be taken out using the connection point 502P inside the heat sink 50 of the upper arm 46 of any phase as the battery connection portion 501. The connection point 502P that is most easily taken out from the attached state can be selected as the battery connection portion 501. Further, since the heat sinks have the same shape, the connection of the heat sinks of the upper arm can be made the same shape, and only the shape of the connection point for taking out the battery terminal needs to be changed.

As described above, each heat sink has the same shape, and the structure of the connection portion at the connection point is distinguished into two types depending on whether it is the connection point of the battery terminal or the heat sink (for example, changing the length of the connection bolt). The total number of types of parts can be reduced, and the cost can be reduced.
Even if the position of the battery terminal needs to be changed due to a change in the mounting position of the rotating electrical machine to the internal combustion engine, it can be handled by changing the position of the connection point where the battery terminal is taken out. There is no need to newly set the heat sink, and the manufacturing cost of the heat sink can be reduced.
Furthermore, since all the heat sink assembly processes are common, production facilities can be shared and productivity is improved.

Embodiment 4 FIG.
Hereinafter, Embodiment 4 of the present invention will be described with reference to FIG. 9 which is a perspective view of another example of the mounting portion of the heat sink group, which is a main part of the in-vehicle rotary electric machine, as viewed from the rear side.

  In the present embodiment, as shown in FIG. 9, the take-out position of the battery terminal 501 that is a bolt-shaped battery connection portion is set to two connection points 502P that actually connect the heat sinks 50, 50 of the upper arm. Select and configure one of 502P. Thereby, the position of the battery terminal can be set at a plurality of locations even when the heat sink group having the same shape is used, and a better connection point can be selected as the battery terminal by attaching the rotating electrical machine to the internal combustion engine.

  Further, the battery terminal is taken out from the central heat sink group in the configuration, and the battery current flowing through the heat sink of the upper arm flows more uniformly than when the battery terminal is attached to the heat sink group at the end. For this reason, since the heat sink in which the current generated in the heat sink of the upper arm of each phase flows alternately, heat generation can be suppressed and the life of the switching circuit can be extended. Moreover, electrical efficiency can be improved.

Embodiment 5 FIG.
Embodiment 5 of the present invention will be described below with reference to FIG. 10, which is a plan view of still another example of a mounting portion of a heat sink group, which is a main part of a vehicle-mounted rotating electrical machine, as viewed from the rear side.

  In the present embodiment, as shown in FIG. 10, the smoothing capacitor 43 (see FIG. 10) between an unused one of the connection points 502 </ b> P to be used as the battery connection portion 501 configured in the heat sink group and the ground. (See also 1).

  In the present embodiment, since the heat sinks have substantially the same shape, there is an unused connection point 502P that is a target to be used as the battery connection portion 501. By utilizing this, it is not necessary to configure a new capacitor connection portion, and cost reduction and productivity improvement can be achieved by reducing the number of steps.

Embodiment 6 FIG.
The sixth embodiment of the present invention will be described below with reference to FIG. 11 which is a side view showing a part of another example of the mounting portion of the heat sink group, which is a main part of the vehicle-mounted rotating electrical machine.

In the present embodiment, as shown in FIG. 11, among the battery connection portions 501 provided in the heat sink 50, an unused battery connection portion 501 is used for battery connection, and the battery terminal fixing hole has an insulating bush. 5051 is inserted and the heat sink 50 is fixed to the bracket 11 with a bolt or the like insulated by the bush.
As a result, the heat sink 50 can be securely fixed without providing a special fixing portion to the bracket 11 on the heat sink 50, and cost reduction and productivity improvement can be achieved by reducing the number of steps.

Embodiment 7 FIG.
A seventh embodiment of the present invention will be described below with reference to FIG. 12, which is a side view showing a part of a cross section of another example of a mounting portion of a heat sink group, which is a main part of an in-vehicle rotary electric machine.

  In the present embodiment, as shown in FIG. 12, the case 30 on which the control circuit 44 is mounted is fixed using a battery connection portion 501 that is not used for battery connection. For example, the case 30 is fixed to the bracket 11 through a bolt through the mounting seat of the case 30 and the fixing hole of the battery connection portion 501.

By adopting such a structure, it is not necessary to specially configure the fixing portion of the case 30 on which the control circuit 44 is mounted, and it is possible to reduce costs and improve productivity by reducing man-hours.
Further, the case may be fixed by a battery terminal by electrically insulating the case from the ground.
Further, a wiring may be formed in the case from the case and the battery connection portion so that the power of the control circuit fixed to the case can be supplied.
Thereby, it can arrange | position without providing the fixing | fixed part of a case newly, and can aim at the cost reduction by the man-hour reduction, and the improvement of productivity.

Embodiment 8 FIG.
Hereinafter, an eighth embodiment of the present invention will be described with reference to FIG. 13 which is a plan view seen from the rear side of still another example of a mounting portion of a heat sink group, which is a main part of a vehicle-mounted rotating electrical machine.

In the present embodiment, as shown in FIG. 13, field circuit component 45 is fixed using a connection portion at connection point P used as battery connection portion 501.
By adopting such a structure, it is not necessary to specially configure the fixed portion of the field circuit component 45 connected to the brush holder 19 via the connection terminal 45B, thereby reducing costs and reducing productivity by reducing man-hours. Improvements can be made.
Further, the wiring may be configured so that the field current can be supplied from the fixed portion of the field circuit component.

Embodiment 9 FIG.
Embodiment 9 of the present invention will be described below with reference to FIG. 14, which is a plan view of still another example of a mounting portion of a heat sink group, which is a main part of a vehicle-mounted rotating electrical machine, as viewed from the rear side.

  In the present embodiment, as shown in FIG. 14, a battery connecting portion 501 that is a rod-like terminal is attached from the rear side of the rotating electrical machine. For example, the screw portion at the attachment end of the battery connection portion 501 that is a rod-like terminal is configured to be screwed into the heat sink 50 from the rear side of the rotating electrical machine.

Thus, in the assembly process of the rotating electrical machine, the heat sink group can be assembled in common regardless of the presence or absence of the battery terminal, and the battery terminal can be mounted after the heat sink group of each phase is assembled to the rotating electrical machine body.
For this reason, it is not necessary to select the heat sink group depending on the presence or absence of the battery terminal, and there is no mistake in assembly of the heat sink group, management is simplified, and the manufacturing cost can be reduced.

Embodiment 10 FIG.
Embodiment 10 of the present invention will be described below with reference to FIG. 15 which is a perspective view of another example of the mounting portion of the heat sink group, which is the main part of the vehicle-mounted rotating electrical machine, as viewed from the rear side.

In this embodiment, as shown in FIG. 15, the ground C of the heat sink 51 of the lower arm is connected to the bracket 11 through a fixing portion that fixes the heat sink group to the bracket with fixing means such as bolts at the bolt fastening positions BC1 and BC2. Connecting.
In this embodiment, when the ground terminal is taken out from the rotating electrical machine, one of the fixing screws at the bolt tightening positions BC1 and BC2 of each heat sink attached to the bracket is selected as the ground terminal C.
Thereby, it is possible to select the ground terminal position that is most easily taken out from the mounting position of the rotating electrical machine. Further, even when the mounting position of the rotating electrical machine is changed, it can be dealt with by changing the terminal position, so there is no need to change the shape of the heat sink, and the manufacturing cost of the heat sink can be reduced. Furthermore, since all of the heat sinks are common, production facilities can be shared and productivity is improved.
Further, both the battery terminal and the ground terminal may be configured after the heat sink group is attached to the rotating electrical machine main body.

  Moreover, you may comprise a rotary electric machine combining several said Embodiment.

  As described in the first to tenth embodiments of the present invention, the features of the present invention are as follows.

A rotor in which field windings are wound and held rotatably, a stator having armature windings arranged around the rotor, a bracket that supports both, and a stator fixed to the bracket. A stator current switching circuit for supplying an n-phase stator current, a heat sink group composed of 2n heat sinks for cooling the switching circuit, a control circuit for controlling the stator current switching circuit, and a control circuit for protecting and fixing the control circuit to the bracket In a control circuit-integrated rotating electrical machine having a case and a battery terminal for connecting a current cable for energizing a battery bidirectionally, the shape of the heat sink is substantially the same for both n phases, and the position of the battery terminal is At least two heat sinks are provided with fixing holes for battery terminals so that they can be changed. It is characterized in that the installation position of has a selectable structure.
Previously, of the n pairs of heat sinks attached to each phase, only the heat sinks with battery terminals were different in shape, but the problem was high cost because parts could not be shared, and similar shapes during assembly It was necessary to divide the heat sink so as not to make a mistake, and to sort out the heat sink, which was troublesome. In addition, when the position of the battery terminal needs to be changed due to the layout of the rotating electrical machine mounted on the vehicle, it is necessary to change the heat sink. According to the present invention, it becomes possible to share a heat sink corresponding to the n phase, and the cost can be reduced. In addition, the position of the battery terminal can be changed without changing the shape of the heat sink. Therefore, the cost can be reduced, and the work line can be shared, and the productivity is improved.

The battery terminal is arranged in a phase from the center, not the end of the n heat sink groups assembled to the rotating electrical machine.
In the rotating electrical machine of the present invention, the drive / generated current flows through the path of the battery terminal⇔heat sink⇔switching device⇔stator. For this reason, if there is a battery terminal on the heat sink connected to the end, the amount of current flowing through each heat sink becomes non-uniform. On the other hand, if the battery terminal is formed in the heat sink near the center, the heat sink through which the current flows is alternated, so that heat generation can be suppressed and the life of the switching circuit can be extended. Moreover, electrical efficiency can be improved.

Of the battery terminal fixing holes formed in the heat sink group, those not used as battery terminals are used for connection to a capacitor.
By using an unused fixing hole prepared in advance, the number of parts can be reduced, cost can be reduced, and productivity can be improved.

Among the battery terminal fixing holes formed in the heat sink group, those not used for fixing the battery terminals are used for fixing the heat sink.
Since the heat sink of each phase fixed to the bracket can be connected and the entire heat sink group can be firmly fixed, the vibration resistance can be improved. Further, by using an unused fixing hole prepared in advance, the number of types of parts can be reduced, cost can be reduced, and productivity can be improved.

The battery terminal fixing hole formed in the heat sink group is used as a connection terminal of the plus side heat sink between the phases.
By using a battery terminal fixing hole prepared in advance for the connection of the positive heat sink of each phase, the number of types of parts can be reduced, and the cost can be reduced and the productivity can be improved. In addition, the current path is simplified and the loss can be reduced compared to attaching another connection terminal to the heat sink. (You can also use the hole where the battery terminal is attached.)

The battery terminal fixing hole formed in the heat sink group is used for fixing a case or a protective cover of a rotating electric machine.
By using the battery terminal fixing holes prepared in advance, the number of parts can be reduced, the cost can be reduced, and the productivity can be improved. In addition, by directly fixing the heat sink group and the case or cover, the behavior at the time of each vibration becomes close, and it is possible to prevent breakage of the connection portion of each part due to a difference in vibration response. (You can also use the hole where the battery terminal is attached.)

The battery terminal fixing hole formed in the heat sink group is used for fixing field circuit components.
By using the battery terminal fixing holes prepared in advance, the number of parts can be reduced, the cost can be reduced, and the productivity can be improved. Further, since the field current can be supplied to the field circuit through the fixed portion, the structure of the field circuit component can be simplified and the cost can be reduced. (You can also use the hole where the battery terminal is attached.)

It is characterized by a structure in which a bolt serving as a battery terminal can be mounted from the rear side.
Since the position of the battery terminal is set last, the n-phase heat sink group can be shared when assembling the rotating electrical machine, there is no mistake in assembly of the heat sink group, and there is no need for selection, so parts management becomes easier and cost reduction it can.

In a rotating electrical machine having a negative terminal of a battery or a ground terminal for connection to an internal combustion engine or body of an automobile, the ground terminal is configured using a bolt for fixing a heat sink group to a bracket of the rotating electrical machine, and the internal combustion engine of the rotating electrical machine In accordance with the mounting position of the heat sink group, the optimum extraction position can be selected from a plurality of bolts for fixing the heat sink group.
The flexibility of the ground terminal extraction position can be secured without changing the shape of the heat sink, and the number of parts can be reduced by sharing the ground terminal and the fixing bolt of the heat sink group, reducing costs and improving productivity. .

The number of phases of the stator of the control circuit-integrated rotating electrical machine is three phases (n = 3).
In the rotating electric machine for both driving and power generation, the number of phases is set to the minimum necessary, so that the number of parts can be reduced, the assembly process can be simplified, and the manufacturing cost can be reduced.

  A rotatable rotor having field windings, a stator having n (where n is a natural number) phase armature winding disposed around the rotor, the rotor and the stator. In a vehicle-mounted rotating electrical machine including a supporting bracket, and an inverter bridge that controls a stator current by connecting a DC end to a battery and an AC end connected to the armature winding of each phase, the bracket is fixed to the bracket and the 2n heat sinks for individually cooling the high-potential side arm and the low-potential side arm of each phase of the inverter bridge are provided, and the battery connection portion used for connecting the battery and the inverter bridge includes at least two heat sinks Each of the battery connection portions is provided at the same position on the heat sink in which each of the battery connection portions is provided.

  A heat sink for each phase is disposed so as to double surround the rotating shaft of the rotor with the heat sink for each phase, and the heat sink on the outer peripheral side is one of the high potential side arm and the low potential side arm for each phase. In addition, the inner peripheral heat sink is the other of the high-potential side arm of each phase and the low-potential side arm of each phase.

  The battery connecting portion is located between heat sinks on the outer peripheral side.

  The battery connecting portion is provided so as to be located on the inner side in the radial direction of the rotating electrical machine with respect to the heat sink on the outer peripheral side.

  One of the plurality of battery connection portions is used for battery connection, and the battery connection portion that is unused for battery connection is used for connection with a smoothing capacitor at the battery input end. It is.

  One of the plurality of battery connection portions is used for the battery connection, and the battery connection portion not used for the battery connection is used for fixing the heat sink having the battery connection portion. It is.

  A plurality of the battery connection portions are used for a connection terminal of a plus-side heat sink between the phases.

  A case to which a control circuit for controlling the inverter bridge is attached is fixed to the bracket via the battery connecting portion.

  A field control circuit section for controlling the current of the field winding is fixed to the bracket via the battery connection section.

  The battery connection portion is disposed on a side of the heat sink opposite to the stator, and a bolt serving as a battery terminal used for connection with the battery is connected to the battery connection portion on the side opposite to the stator. It is characterized by being mounted from.

The bolt used for fixing the heat sink is also used as a ground terminal.

It is a figure which shows Embodiment 1 of this invention, and is a connection diagram which shows the example of the schematic circuit structure of a vehicle-mounted rotary electric machine. It is a figure which shows Embodiment 1 of this invention, and is a vertical side view which shows the example of the cross-sectional structure of the side surface of a vehicle-mounted rotary electric machine. It is a figure which shows Embodiment 1 of this invention, and is the top view which looked at the example of the mounting part of the heat sink group which is the principal part of a vehicle-mounted rotary electric machine from the rear side. It is a figure which shows Embodiment 1 of this invention, and is a perspective view which shows the example of the heat sink pair for 1 phase. It is a figure which shows Embodiment 1 of this invention, and is a figure which shows the expanded view of the example of the heat sink pair for 1 phase by a perspective view. It is a figure which shows Embodiment 1 of this invention, and is a side view which shows the example of the heat sink for upper arms which is a high electric potential side arm. It is a figure which shows Embodiment 2 of this invention, and is the top view which looked at the other example of the mounting part of the heat sink group which is the principal part of a vehicle-mounted rotary electric machine from the rear side. It is a figure which shows Embodiment 3 of this invention, and is the top view which looked at the other example of the mounting part of the heat sink group which is the principal part of a vehicle-mounted rotary electric machine from the rear side. It is a figure which shows Embodiment 4 of this invention, and is the perspective view which looked at the other example of the mounting part of the heat sink group which is the principal part of a vehicle-mounted rotary electric machine from the rear side. It is a figure which shows Embodiment 5 of this invention, and is the top view which looked at the other example of the mounting part of the heat sink group which is the principal part of a vehicle-mounted rotary electric machine from the rear side. It is a figure which shows Embodiment 6 of this invention, and is a side view which shows the other example of the mounting part of the heat sink group which is the principal part of a vehicle-mounted rotary electric machine in a partial cross section. It is a figure which shows Embodiment 7 of this invention, and is a side view which shows the other example of the mounting part of the heat sink group which is the principal part of a vehicle-mounted rotary electric machine in a partial cross section. It is a figure which shows Embodiment 8 of this invention, and is the top view which looked at the other example of the mounting part of the heat sink group which is the principal part of a vehicle-mounted rotary electric machine from the rear side. It is a figure which shows Embodiment 9 of this invention, and is the perspective view which looked at the other example of the mounting part of the heat sink group which is the principal part of a vehicle-mounted rotary electric machine from the rear side. It is a figure which shows Embodiment 10 of this invention, and is the perspective view which looked at the other example of the mounting part of the heat sink group which is the principal part of a vehicle-mounted rotary electric machine from the rear side.

Explanation of symbols

1 In-vehicle rotating electrical machine body,
4 Power circuit unit (stator current switching circuit),
5 battery,
13 rotation axis,
14 Field winding,
15 rotor,
16 Stator,
16a armature winding,
16c connecting conductor,
17 fans,
19 brush holder,
30 cases,
301 mounting seat,
31, 31a, 31b Ventilation holes,
40 Inverter bridge,
41, 41a, 41b switching elements,
43 Smoothing capacitor,
44 control circuit,
45 Field circuit,
45B Connection terminal from field circuit to brush,
46 Upper arm (high potential side arm),
47 Lower arm (low potential side arm),
50 inner heat sink,
50h1 through hole,
5051 insulation bush,
501 battery connection,
501h fixing hole,
502 connection part,
502P connection point,
51 outer heat sink,
51h1 through hole,
5116 Stator connection,
52 Rear terminal,
53 Front terminal,
531 conductive plate,
59 Insulation plate,
60 U-phase site,
70 V phase site,
80 W phase part 1
BC1, BC2 Bolt tightening position.

Claims (12)

A rotatable rotor having field windings, a stator having n (where n is a natural number) phase armature winding disposed around the rotor, the rotor and the stator. In a vehicle-mounted rotating electrical machine including a supporting bracket, and an inverter bridge that controls a stator current by connecting a DC end to a battery and an AC end connected to the armature winding of each phase,
2n heat sinks that are fixed to the bracket and individually cool the high potential side arm and the low potential side arm of each phase of the inverter bridge,
A battery connection used for connection between the battery and the inverter bridge is provided in at least two heat sinks,
Each of the battery connection portions has the same position on the heat sink in which each of the battery connection portions is provided. The in-vehicle rotating electrical machine according to claim 1,
A heat sink for each phase is disposed so as to double surround the rotating shaft of the rotor with the heat sink for each phase, and the heat sink on the outer peripheral side is one of the high potential side arm for each phase and the low potential side arm for each phase. An in-vehicle rotary electric machine characterized in that the inner peripheral heat sink is the other of the high potential side arm of each phase and the low potential side arm of each phase. The in-vehicle rotating electrical machine according to claim 2,
The in-vehicle rotating electrical machine, wherein the battery connecting portion is located between heat sinks on the outer peripheral side. The in-vehicle rotating electrical machine according to claim 2, wherein the battery connecting portion is
An in-vehicle rotary electric machine, which is provided on the inner side in the radial direction of the rotary electric machine from the heat sink on the outer peripheral side. In the on-vehicle rotary electric machine according to any one of claims 1 to 4,
One of the plurality of battery connection portions is used for battery connection, and the battery connection portion that is not used for battery connection is used for connection with a smoothing capacitor at the battery input end. Type rotating electric machine. In the on-vehicle rotary electric machine according to any one of claims 1 to 4,
One of the plurality of battery connection portions is used for battery connection, and the battery connection portion that is unused for battery connection is used for fixing the heat sink having the battery connection portion. Type rotating electric machine. The in-vehicle rotating electrical machine according to any one of claims 1 to 6,
A plurality of the battery connection parts are used as a connection terminal of a plus-side heat sink between the phases. In the on-vehicle rotary electric machine according to any one of claims 1 to 7,
A vehicle-mounted rotating electrical machine, wherein a case to which a control circuit for controlling the inverter bridge is attached is fixed to the bracket via the battery connecting portion. In the vehicle-mounted rotating electrical machine according to any one of claims 1 to 8,
A vehicle-mounted rotating electrical machine characterized in that a field control circuit section for controlling a current of the field winding is fixed to the bracket via the battery connection section. In the vehicle-mounted rotary electric machine according to any one of claims 1 to 9,
The battery connection portion is disposed on a side of the heat sink opposite to the stator;
A vehicle-mounted rotating electrical machine, wherein a bolt serving as a battery terminal used for connection with the battery is attached to the battery connection portion from a side opposite to the stator. In the vehicle-mounted rotary electric machine according to any one of claims 6 to 10,
A vehicle-mounted rotating electrical machine, wherein a bolt used for fixing the heat sink is also used as a ground terminal. In the vehicle-mounted rotary electric machine according to any one of claims 1 to 11,
The number of phases of the stator is three phases.

Images