JP6024631B2 - Rotating electric machine for vehicles - Google Patents

Description

  The present invention relates to a vehicular rotating electrical machine mounted on a passenger car, a truck, or the like.

  2. Description of the Related Art Conventionally, there is known a controller-integrated rotating electrical machine in which an inverter power circuit, a control board that controls the inverter power circuit, and a resin case that surrounds the control board are held and fixed to a rear bracket ( For example, see Patent Document 1.) The control board is housed in a resin case attached to the rear of the rear bracket, and a lid is attached to the upper part of the control board to prevent foreign matter from entering the resin case. A magnetic position detection sensor is attached to the rear end of the rotor shaft.

JP 2011-97806 A

  By the way, since the control board disclosed in Patent Document 1 is housed in the resin case, the connection of the signal line between the magnetic position detection sensor arranged outside the resin case and the control board passes through the resin case. The structure around the control board and the resin case becomes complicated. Further, since it is necessary to connect the signal line through the resin case, it is necessary to take measures such as applying a sealing material so that foreign substances such as water do not enter the resin case from the through portion. On the other hand, if the magnetic position detection sensor can be mounted on the control board, it is convenient that the signal lines can be easily wound and the sealing material can be omitted. However, if the control board is not accurately positioned, the position of the magnetic position detection sensor mounted on the control board will also shift, and the position detection accuracy will deteriorate.

  The present invention has been made in view of such a point, and an object thereof is to provide a vehicular rotating electrical machine capable of improving position detection accuracy.

  In order to solve the above-described problem, a rotating electrical machine for a vehicle according to the present invention includes a rotor, a stator, a frame, a brush device, a power converter, a control board, and a board case. The rotor has a rotation detecting magnet attached to the end of the rotating shaft. The stator is disposed opposite to the rotor. The frame accommodates and holds the rotor and the stator. The brush device has a pair of brushes fixed to the frame and in sliding contact with a slip ring provided on the rotating shaft. The power converter converts an AC voltage induced in a stator winding included in the stator into a DC voltage, or converts a DC voltage applied from the outside into an AC voltage and applies it to the stator winding. The control board is mounted with a rotation angle sensor disposed opposite to the rotation detection magnet and a control circuit for controlling the power converter. The board case houses the control board. The control board or board case is electrically connected and positioned using a power supply terminal extending from the brush device.

  By positioning the control board or board case using a power supply terminal that extends from the brush device fixed to the frame, it becomes possible to place the control board on which the rotation angle sensor is mounted at a predetermined position. The position detection accuracy using the angle sensor can be improved.

It is a figure which shows the structure of the rotary electric machine for vehicles of one Embodiment. It is a figure which shows the structure of a MOS module. It is a figure which shows the structure of H bridge circuit. It is a figure which shows the specific example of arrangement | positioning of a rotation angle sensor. It is a perspective view of the rotary electric machine for vehicles containing a power converter. It is a disassembled perspective view of a power converter. It is a figure which shows schematic shape of a positive electrode side input / output terminal and a negative electrode side input / output terminal. It is a top view which shows the attachment state of a power converter. It is a fragmentary sectional view of a frame. It is a top view which shows the resin case in which the control board was accommodated. It is the XI-XI sectional view taken on the line of FIG. It is a top view which shows the shape of a control board. It is sectional drawing which shows the modification of a substrate case. It is sectional drawing of a brush holder. It is a top view of a brush holder. It is a top view which shows the modification of a substrate case.

  Hereinafter, a rotating electrical machine for a vehicle according to an embodiment to which the present invention is applied will be described with reference to the drawings. As shown in FIG. 1, a rotating electrical machine 100 for a vehicle according to an embodiment includes two stator windings 1A and 1B, a field winding 2, two MOS module groups 3A and 3B, a UVW phase driver 4A, and an XYZ phase. A driver 4B, an H bridge circuit 5, an H bridge driver 6, a rotation angle sensor 7, a control circuit 8, an input / output circuit 9, a power supply circuit 10, a diode 11, and a capacitor 12 are configured. The vehicular rotating electrical machine 100 is called an ISG (Integrated Starter Generator), and has both a function of an electric motor and a function of a generator.

  One stator winding 1A is a three-phase winding composed of a U-phase winding, a V-phase winding, and a W-phase winding, and is wound around a stator core (not shown). Similarly, the other stator winding 1B is a three-phase winding composed of an X-phase winding, a Y-phase winding, and a Z-phase winding, and the stator iron core described above is connected to the stator winding 1A. And is wound at a position shifted by 30 degrees in electrical angle. In the present embodiment, a stator disposed opposite to the rotor is constituted by the two stator windings 1A and 1B and the stator core. The number of phases of each of the stator windings 1A and 1B may be other than three.

  The field winding 2 is for generating a magnetic field in a rotor having a rotating shaft that inputs and outputs a driving force to and from the engine via a belt or a gear, and a field pole (not shown) It is wound to form a rotor.

  One MOS module group 3A is connected to one stator winding 1A to form a three-phase bridge circuit as a whole. This MOS module group 3A converts an AC voltage induced in the stator winding 1A during a power generation operation into a DC voltage, and also converts a DC voltage applied from the outside (high voltage battery 200) into an AC voltage during an electric operation. Then, it operates as a power converter 3 applied to the stator winding 1A. The MOS module group 3A includes MOS modules 3AU, 3AV, and 3AW as three switching modules corresponding to the number of phases of the stator winding 1A. MOS module 3AU is connected to a U-phase winding included in stator winding 1A. MOS module 3AV is connected to a V-phase winding included in stator winding 1A. MOS module 3AW is connected to a W-phase winding included in stator winding 1A.

  As shown in FIG. 2, the MOS module 3AU includes two MOS transistors 30 and 31 and a current detection resistor 32. One MOS transistor 30 has a source connected to the U-phase winding of the stator winding 1A via the P terminal and a first switching of the upper arm (high side) whose drain is connected to the power power supply terminal PB. It is an element. The power power supply terminal PB is connected to the positive terminal of the high voltage battery 200 (first battery) or the high voltage load 210 having a rating of 48V, for example. The other MOS transistor 31 has a drain connected to the U-phase winding via the P terminal and a source connected to the power ground terminal PGND via the current detection resistor 32 in the second lower-arm side (low side). It is a switching element. A series circuit composed of these two MOS transistors 30 and 31 is arranged between the positive terminal and the negative terminal of the high-voltage battery 200, and a U-phase winding is connected to the connection point of these two MOS transistors 30 and 31 via the P terminal. Is connected. Further, the gate and source of the MOS transistor 30, the gate of the MOS transistor 31, and both ends of the current detection resistor 32 are connected to the UVW phase driver 4A.

  A diode is connected in parallel between the source and drain of each of the MOS transistors 30 and 31. This diode is realized by a parasitic diode (body diode) of the MOS transistors 30 and 31, but a diode as a separate part may be further connected in parallel. You may make it comprise at least one of an upper arm and a lower arm using switching elements other than a MOS transistor.

  Note that MOS modules 3AV and 3AW other than the MOS module 3AU and MOS modules 3BX, 3BY, and 3BZ, which will be described later, basically have the same configuration and will not be described in detail.

  The other MOS module group 3B is connected to the other stator winding 1B, and a three-phase bridge circuit is formed as a whole. This MOS module group 3B converts the AC voltage induced in the stator winding 1B into a DC voltage during a power generation operation, and converts the DC voltage applied from the outside (high voltage battery 200) into an AC voltage during an electric operation. Then, it operates as a power converter 3 applied to the stator winding 1B. The MOS module group 3B includes MOS modules 3BX, 3BY, and 3BZ as three switching modules corresponding to the number of phases of the stator winding 1B. The MOS module 3BX is connected to the X-phase winding included in the stator winding 1B. The MOS module 3BY is connected to a Y-phase winding included in the stator winding 1B. MOS module 3BZ is connected to a Z-phase winding included in stator winding 1B.

  The UVW phase driver 4A generates a drive signal to be input to each gate of the MOS transistors 30 and 31 included in each of the three MOS modules 3AU, 3AV, and 3AW, and detects a voltage across the current detection resistor 32. . Similarly, the XYZ phase driver 4B generates drive signals to be input to the gates of the MOS transistors 30 and 31 included in each of the three MOS modules 3BX, 3BY, and 3BZ, and the voltage across the current detection resistor 32. Is detected.

  The H bridge circuit 5 is connected to both ends of the field winding 2 via the brush device 55 (FIG. 5) and is an excitation circuit that supplies an excitation current to the field winding 2. As shown in FIG. 3, the H-bridge circuit 5 includes two MOS transistors 50, 51, two diodes 52 and 53, and a current detection resistor 54. A high-side MOS transistor 50 and a low-side diode 52 are connected in series, and one end of the field winding 2 is connected to this connection point. A high-side diode 53, a low-side MOS transistor 51, and a current detection resistor 54 are connected in series, and the other end of the field winding 2 is connected to a connection point between the diode 53 and the MOS transistor 51. Has been. The H bridge circuit 5 is connected to each of the power power supply terminal PB and the power ground terminal PGND. By turning on the MOS transistors 50 and 51, an exciting current is supplied from the H bridge circuit 5 to the field winding 2. Further, by turning off one of the MOS transistors 50 and 51, the supply of the excitation current is stopped, and the excitation current flowing through the field winding 2 can be circulated through one of the diodes 52 and 53. .

  The H bridge driver 6 generates a drive signal to be input to each gate of the MOS transistors 50 and 51 included in the H bridge circuit 5 and detects a voltage across the current detection resistor 54.

  The rotation angle sensor 7 detects the rotation angle of the rotor. For example, the rotation angle sensor 7 can be configured using a permanent magnet and a Hall IC. Specifically, as shown in FIG. 4, a permanent magnet 22 as a rotation detecting magnet is fixed to the tip of the rotating shaft 21 of the rotor 20, and a position on the control board 102 is located at a position facing the permanent magnet 22. The Hall IC 23 serving as the rotation angle sensor 7 is disposed at the center. The Hall IC 23 includes Hall elements arranged in the vicinity of the outer periphery of the permanent magnet 22 and at positions separated from each other by 90 °. By extracting the outputs of these Hall elements, the rotation angle of the rotor 20 that rotates together with the permanent magnet 22 can be detected. Note that the rotation angle sensor 7 may be configured using a device other than the Hall IC 23 (for example, a magnetoresistive element, a magnetic impedance element, or the like). Further, the arrangement and attachment method of the permanent magnets 22 shown in FIG. 4 are merely examples, and may be appropriately changed according to the rotating shaft 21 and its peripheral structure.

  The control circuit 8 controls the entire vehicular rotating electrical machine 100 including the power converter 3. The control circuit 8 includes an analog-digital converter and a digital-analog converter, and inputs / outputs signals to / from other components. The control circuit 8 is constituted by, for example, a microcomputer (microcomputer), and controls the UVW driver 4A, the XYZ driver 4B, and the H bridge driver 6 by executing a predetermined control program, and the electric rotating machine 100 for the vehicle is driven by an electric motor. Or operate as a generator, or perform various processes such as abnormality detection and notification.

  The input / output circuit 9 performs input / output of signals to / from the outside via the control harness 310, level conversion of the terminal voltage of the high voltage battery 200 and the voltage of the power ground terminal PGND, and the like. The input / output circuit 9 is an input / output interface for processing input / output signals and voltages, and a necessary function is realized by, for example, a custom IC.

  The power supply circuit 10 is connected to a low voltage battery 202 (second battery) with a rating of 12 V, and generates an operating voltage of 5 V by turning on and off the switching element and smoothing the output with a capacitor, for example. With this operating voltage, the UVW phase driver 4A, the XYZ phase driver 4B, the H bridge driver 6, the rotation angle sensor 7, the control circuit 8, and the input / output circuit 9 operate.

  The capacitor 12 is for removing or reducing switching noise generated when the MOS transistors 30 and 31 such as the MOS module 3AU are turned on and off to electrically operate the vehicular rotating electrical machine 100. Although one capacitor 12 is used in FIG. 1, in practice, the number is appropriately determined according to the magnitude of switching noise. For example, as shown in FIG. 5, four capacitors 12 are used in the vehicular rotating electrical machine 100 of the present embodiment.

  UVW phase driver 4A, XYZ phase driver 4B, H bridge circuit 5, H bridge driver 6, rotation angle sensor 7 (excluding permanent magnets attached to the rotor), control circuit 8, input / output circuit 9, power supply circuit 10 is mounted on one control board 102.

  As shown in FIG. 1, the vehicular rotating electrical machine 100 includes a connector 400 to which a power power terminal PB, a power ground terminal PGND, a control ground terminal CGND, a control power terminal CB, a control harness 310, and the like are attached. ing. The power power supply terminal PB is a high voltage positive side input / output terminal to which the high voltage battery 200 and the high voltage load 210 are connected via a predetermined cable. The control power supply terminal CB is a low-voltage positive-side input terminal to which a low-voltage battery 202 and a low-voltage load 204 are connected via a predetermined cable.

  The power ground terminal PGND is a first ground terminal as a negative input / output terminal, and is used for grounding the power system circuit. The power ground terminal PGND is connected to the vehicle frame 500 via a grounding harness 320 as a first connection line. The MOS module groups 3A and 3B (power converter 3) and the H bridge circuit 5 (excitation circuit) described above are power system circuits. This power system circuit includes MOS transistors 30, 31, 50, 51 as power elements through which a current common to the stator windings 1A, 1B and the field winding 2 flows.

  The control ground terminal CGND is a second ground terminal provided separately from the power ground terminal PGND, and is for grounding the control system circuit. The control ground terminal CGND is grounded via a grounding cable 330 (second connection line) different from the grounding harness 320. A diode 11 is inserted between the control ground terminal CGND and the frame (hereinafter referred to as “ISG frame”) 110 of the vehicular rotating electrical machine 100 via an internal wiring of the input / output circuit 9. Specifically, the cathode of the diode 11 is connected to the frame ground terminal FLMGND, and this frame ground terminal FLMGND is connected to the ISG frame 110. The UVW phase driver 4A, the XYZ phase driver 4B, the H bridge driver 6, the rotation angle sensor 7, the control circuit 8, the input / output circuit 9 and the like described above are control system circuits. Note that the ground cable 330 is connected to a ground potential (0 V) portion prepared on the vehicle side and has no voltage fluctuation. In FIG. 1, the diode 11 is provided outside the input / output circuit 9, but the diode 11 may be mounted on the input / output circuit 9.

  The connector 400 is for attaching the control harness 310, the grounding cable 330, and other cables to terminals (such as the control ground terminal CGND and the control power terminal CB) other than the power power terminal PB and the power ground terminal PGND.

  The above-described ISG frame 110 of the vehicular rotating electrical machine 100 is a conductor formed by, for example, aluminum die casting, and the ISG frame 110 is fixed to the engine (E / G) block 510 with bolts. Further, the engine block 510 is connected to the vehicle frame 500 by a grounding harness 322.

  The vehicular rotating electrical machine 100 of the present embodiment has such a configuration, and next, the structure and control of the structure of the power converter 3 and the substrate case 80 (FIGS. 10 and 11) that houses the control substrate 102. A positioning structure of the substrate 102 will be described.

  As shown in FIG. 6, the power converter 3 configured integrally including the two MOS module groups 3 </ b> A and 3 </ b> B includes the MOS modules 3 </ b> AU, 3 </ b> AV, 3 </ b> AW, 3BX, 3BY, 3BZ, and the positive-side input / output terminal 300. And a terminal block 308 from which the negative input / output terminal 301 protrudes, and six intermediate terminal blocks 309 arranged between each MOS module 3 AU and the terminal block 308. The positive electrode side input / output terminal 300 and the negative electrode side input / output terminal 301 have different shapes (for example, bolts having different diameters). In the exploded perspective view of the power converter 3 shown in FIG. 6 and the perspective view of the vehicular rotating electrical machine 100 shown in FIG. 5, the control board 102 on which the control circuit 8 and the input / output circuit 9 are mounted, and the control board 102 A state is shown in which the substrate case 80 for storing the battery, the rear cover that covers the power converter 3, the control board 102, and the like are removed.

  The terminal block 308 is formed by insert molding, and the positive electrode side bus bar 302 as a plate-like wiring layer to which the positive electrode side input / output terminal 300 is connected and the plate type wiring to which the negative electrode side input / output terminal 301 is connected. And a negative electrode side bus bar 303 as a layer (FIG. 7). Each of the positive electrode side bus bar 302 and the negative electrode side bus bar 303 is laminated in a state of being opposed to each other with a resin material constituting the terminal block 308 interposed therebetween. FIG. 5 shows a state in which a part of the terminal block 308 is partially broken, and the positive bus bar 302 and the negative bus bar 303 are exposed on the fracture surface (part A).

  As shown in FIG. 7, the positive electrode side bus bar 302 has two branch portions 302 </ b> A and 302 </ b> B extending in two directions with the positive electrode side input / output terminal 300 interposed therebetween. These two branch portions 302A and 302B have a symmetrical shape (line symmetry) with the centers of the positive input / output terminal 300 and the negative input / output terminal 301 interposed therebetween. As shown in FIG. 8, the power supply terminals (power power supply terminals PB) of the MOS modules 3AU, 3AV, and 3AW are connected to the one branch portion 302A at substantially equal intervals. The power supply terminals (power power supply terminals PB) of the MOS modules 3BX, 3BY, and 3BZ are connected to the other branch portion 302B at substantially equal intervals. Further, the negative electrode side bus bar 303 has two branch portions 303A and 303B extending in two directions with the negative electrode side input / output terminal 301 interposed therebetween. These two branch portions 303A and 303B have a symmetrical shape (axisymmetric) with the centers of the positive input / output terminal 300 and the negative input / output terminal 301 interposed therebetween. The ground terminals (power ground terminals PGND) of the MOS modules 3AU, 3AV, and 3AW are connected to the one branch portion 303A at substantially equal intervals. The ground terminals (power ground terminals PGND) of the MOS modules 3BX, 3BY, and 3BZ are connected to the other branch portion 303B at substantially equal intervals.

  In order to improve thermal conductivity, it is desirable to fill a gap between the lower surface of the MOS module 3AU or the like and the frame 40 with grease G1 (FIG. 6) having good thermal conductivity. Further, since the positive electrode side bus bar 302 and the negative electrode side bus bar 303 (terminal block 308) are in contact with the upper surface of the MOS module 3AU or the like in a pressed state, the heat generation of the MOS transistors 30 and 31 included in the MOS module 3AU or the like. It is also used as a heat radiating member that radiates heat. However, in order to improve the heat dissipation as the heat radiating member, the thermal conductivity of the mold resin forming the MOS module 3AU or the terminal block 308 or the gap between the MOS module 3AU or the terminal block 308 is increased. It is desirable to devise such as filling grease G2 (FIG. 6) with good thermal conductivity. In FIG. 6, the filling positions of the greases G1 and G2 corresponding to the MOS module 3BX are indicated by hatching, but the same applies to the other MOS modules 3AU and the like, and the illustration is omitted. In addition, it is not always necessary to fill at least one of the greases G1 and G2 in correspondence with all the MOS modules 3AU, and the number of MOS modules 3AU to be filled is reduced in consideration of variation in heat dissipation. It may be.

  The frame 40 is for housing and holding the rotor 20 and the stator 2, and as shown in FIGS. 5 and 6, the frame 40 is divided into three divided parts, a rear part 40A, a center part 40B, and a front part 40C. It is configured. The center portion 40B is a cylindrical member that encloses the stator, and has a concave portion 41A that constitutes the coolant channel 41 inside, as shown in FIG. The rear portion 40A is a disk-like member that closes the rear side (the non-pulley side) that is one axial end of the center portion 40B. The coolant channel 41 of the center portion 40B opens at one axial end of the center portion 40B, and O-rings 42 for maintaining airtightness are disposed on both sides of the opening, and these O-rings 42 are provided. The coolant flow path 41 is formed by attaching the rear portion 40A so as to abut against and closing the opening surface of the recess 41A. Further, in the rear portion 40A, the power converter 3 is attached in a state where the lower surface of each MOS module 3AU or the like is in contact with the axial end surface opposite to the center portion 40B.

  The coolant channel 41 has a C-shaped cross section, and a coolant inlet 41B (FIGS. 5 and 6) corresponds to the other end of a part of the rear portion 40A corresponding to one end thereof. A coolant outlet 41C (FIGS. 5 and 6) is provided in a part of the rear portion 40A. A coolant pipe 41D (FIG. 9) is connected to each of the coolant inlet 41B and the coolant outlet 41C to supply and discharge the coolant. The frame 40 is cooled by flowing the coolant through the coolant channel 41.

  Further, a board case 80 (not shown) is disposed on the power converter 3 shown in FIG. 5, and the control board 102 is accommodated in the board case 80. As shown in FIGS. 10 and 11, the substrate case 80 is accommodated in the control substrate 102. The substrate case 80 includes a housing 82 on which the control substrate 102 is mounted, and a cover 84 that covers the opening of the housing 82 with a sealing material 83 interposed therebetween. FIG. 10 shows a state before the sealing material 83 and the cover 84 are attached.

  The housing 82 has four fixing portions 82B arranged on the inner diameter side of the outer peripheral portion 82A, and is fixed to the rear portion 40A of the frame 40 by these four fixing portions 82B. These four fixing portions 82B are arranged symmetrically with respect to the rotating shaft 21. Each fixing portion 82B is formed with an insertion hole 82C through which a screw as a fixing member is inserted. The rear portion 40 </ b> A of the frame 40 has four mounting posts 44 (FIGS. 5, 6, and 8) that protrude rearward along the rotation shaft 21 of the rotor 20. These four mounting posts 44 are provided at positions corresponding to the above-described four fixing portions 82B. By tightening a screw through the insertion hole 82C formed in each of the fixing portions 82B, the fixing portion 82B can be fastened to the mounting post 44 and the entire substrate case 80 can be fixed to the rear portion 40A.

  As shown in FIG. 12, the control board 102 has a polygonal shape (for example, a shape close to an octagon) along the outer shape of the board case 80, and the four fixing portions of the board case 80 (housing 82). There are notches 80A as penetrating parts from the outer shape at positions (four places) corresponding to 82B. Instead of providing the cutout portion 80A, a through hole as a through portion that matches the shape of the fixed portion 82B may be provided.

  The cover 84 is attached to the housing 82 so as to cover the outer peripheral portion 82A of the housing 82 via a sealing material 83, and covers the entire control board 102 including the four fixing portions 82B. The end portion of the outer peripheral portion 82A that comes into contact with the cover 84 has a V-groove shape as shown in FIG. 11, so that the seal area is enlarged and positioning is facilitated. In order to simply ensure sealing performance, a flat shape may be used instead of the V groove shape.

  Further, the housing 82 described above has a partition wall 82D penetrating a notch 80A as a penetrating portion provided in the control board 102 around each fixed portion 82B. Inside the partition wall 82D, the entire fixing portion 82B including the insertion hole 82C is disposed. Further, as shown in FIG. 11, the end portion of the partition wall 82D is in contact with the cover 84 via a sealing material 83, and the space between the internal space of the partition wall 82D and the mounting space of the control board 102 is partitioned. It is separated by a wall 82D.

  Further, the housing 82 described above is provided between the Hall IC 23 (rotation angle sensor 7) mounted on the control board 102 and the permanent magnet 22 as a rotation detection magnet fixed to the tip of the rotation shaft 21 of the rotor 20. A thin plate member 82E made of nonmagnetic metal is integrally formed by insert molding. The housing 82 is formed of a resin material as an insulating material except for the thin plate member 82E which is a metal material. As the thin plate member 82E, for example, a metal material such as aluminum or copper having good thermal conductivity can be used. The thin plate member 82E is exposed to the outside of the substrate case 80 (lower side in the example shown in FIG. 11). Moreover, the edge part of this thin plate member 82E is embed | buried under four fixing | fixed part 82B (FIG. 11).

  Further, since the thin plate member 82E is a metal material and has good thermal conductivity, the contact portion 82F that contacts a part of the control board 102 (for example, a region where the control circuit 8 having a large amount of heat generation is mounted). It is desirable to provide (FIG. 13). The contact portion 82F is formed by partially projecting the flat plate portion of the thin plate member 82E. Note that the contact portion 82F is not necessarily formed integrally with the thin plate member 82E, and the contact portion 82F made of a metal material as a separate member from the thin plate member 82E is used in combination by screwing or adhesive fixing. May be. Further, by disposing a radiation fin 82G (FIG. 13) that is integral with or separate from the thin plate member 82E on the opposite side of the abutting portion 82F across the thin plate member 82E, the heat radiation performance may be further improved. .

  By the way, as shown in FIG. 4, the Hall IC 23 mounted on the control board 102 needs to be accurately attached at a position (rotational direction position and radial position) facing the permanent magnet 22 attached to the tip of the rotating shaft 21. There is. For this reason, in the present embodiment, the control board 102 is positioned using a power supply terminal extending from the brush device 55.

  As shown in FIG. 8, the brush device 55 includes a brush holder 550 that holds brushes 551 and 552 (FIG. 14) and a slip ring cover 570. These brush holder 550 and slip ring cover 570 cover the space around slip rings 24 and 25 (FIG. 4) provided near the end of rotating shaft 21.

  As shown in FIGS. 14 and 15, the brush holder 550 has a box shape, and storage units 553 and 554 having a rectangular parallelepiped shape for storing two brushes 551 and 552 on the positive electrode side and the negative electrode side therein, A skirt portion 555 that extends from the storage portions 553 and 554 so as to surround the slip rings 24 and 25 (FIG. 4) when assembled, and a flexible lead portion that extends from each of the brushes 551 and 552. A pair of power supply terminals 561 and 562 that are electrically connected to the pigtail 556 and project outward, and a pair of fixing terminals 563 and 564 that are electrically insulated from the power supply terminals 561 and 562 and project outside. Yes. The power supply terminals 561 and 562 and the fixing terminals 563 and 564 are insert-molded in a brush holder 550 made of insulating resin.

  The brushes 551 and 552 are metal graphite containing copper powder in natural graphite and using a phenol resin or the like as a binder. These brushes 551 and 552 have the same shape, and the same shape is disposed so that the pigtails 556 face each other, and are housed in the housing portions 553 and 554 with a spring 557 interposed therebetween. These brushes 551 and 552 are pressed toward the slip rings 24 and 25 by a spring 557 and are in sliding contact within the storage portions 553 and 554.

  As shown in FIG. 15, the fixing terminals 563 and 564 project in an ear shape from each of the opposing side surfaces of the brush holder 550, and holes 563 a and 564 a are provided at the centers of the exposed portions. Each of the holes 563a and 564a is fastened to a pedestal (not shown) provided on the axial end surface of the rear portion 40A through screws 563b and 564b (FIG. 8) as fastening means, whereby the brush holder 550 is rear-mounted. It is fixed to the part 40A. The positioning of the brush holder 550 at this time is performed by attaching the brush holder 550 to a predetermined position while pressing the brush holder 550 in a predetermined direction with the screws 563b and 564b passing through the holes 563a and 564a.

  As shown in FIGS. 14 and 15, the power supply terminals 561 and 562 protrude from the axial end surface of the brush holder 550 to the rear side (anti-pulley side) so as to run in parallel along the rotation shaft 21. A wall portion 565 formed integrally with the brush holder 550 is formed therebetween. The wall portion 565 is formed perpendicular to the end surface of the brush holder 550 from which the pair of power supply terminals 561 and 562 protrudes. In addition, the height of the wall portion 565 is set to be lower than the height of the power supply terminals 561 and 562.

  The power feeding terminals 561 and 562 have a plate-like cross section, and the longitudinal direction of the cross section is arranged along the rotation direction of the rotor 20. Thereby, since the length along the radial direction of the power supply terminals 561 and 562 can be shortened, the length of the brush holder 550 (brush device 55) along the radial direction can be shortened.

  In the present embodiment, electrical connection to the control board 102 and positioning of the control board 102 are performed using the two power supply terminals 561 and 562 protruding from the brush holder 550 to the rear side. Specifically, as shown in FIG. 14, through-holes are formed in each of the thin plate member 82E and the control board 102 included in the housing 82 of the substrate case 50, and two power supply terminals 561 are formed in these through-holes. , 562 is passed through, and a substrate case 80 to which the control substrate 102 is fixed is attached. In particular, by setting the size of the through-hole formed in the control board 102 to be approximately the same as the cross-sectional size of the power supply terminals 561 and 562 (necessary to be slightly increased in consideration of assembly workability), 562 can be engaged with the through hole of the control board 102, and the position (rotational direction position and radial position) of the control board 102 using the power supply terminals 561 and 562 can be determined. The lengths of the power supply terminals 561 and 562 are set so that the leading ends of the power supply terminals 561 and 562 protrude from the control board 102 by a predetermined length, and these protruding portions are soldered to the control board 102 to be controlled. Electrical connection is made with the H-bridge circuit 5 mounted on 102.

  As described above, in the vehicular rotating electrical machine 100 of this embodiment, the control board 102 is positioned using the power supply terminals 561 and 562 extending from the brush device 55 (brush holder 550) fixed to the rear portion 40A of the frame 4. By performing the above, the control board 102 on which the Hall IC 23 of the rotation angle sensor 7 is mounted can be disposed at a predetermined position, and the position detection accuracy using the rotation angle sensor 7 can be improved.

  In particular, the power supply terminals 561 and 562 extend from the brush device 55 in a direction along the rotation shaft 21 and engage with a through hole formed in the control board 102. Thereby, the control board 102 can be reliably engaged with the power supply terminals 561 and 562 of the brush device 55, and the position detection accuracy can be improved.

  The brush device 55 has two power supply terminals 561 and 562 corresponding to the pair of brushes 551 and 552, respectively. By performing positioning using the two power supply terminals 561 and 562, the engagement strength between the power supply terminals 561 and 562 and the control board 102 can be increased, and the position detection accuracy can be further improved.

  In addition, this invention is not limited to the said embodiment, A various deformation | transformation implementation is possible within the range of the summary of this invention. For example, in the above-described embodiment, the vehicular rotating electrical machine 100 that operates as an ISG has been described. However, the present invention can also be applied to a vehicular rotating electrical machine that performs only one of an electric operation and a power generation operation.

  In the embodiment described above, the two stator windings 1A and 1B and the two MOS module groups 3A and 3B are provided. However, the vehicle includes one stator winding 1A and one rectifier module group 3A. The present invention can also be applied to a rotating electrical machine for a vehicle and a rotating electrical machine for a vehicle including three or more stator windings and a MOS module.

  Further, in the above-described embodiment, three MOS modules 3AU and the like are distributed and arranged on the left and right sides of the centers of the positive input / output terminal 300 and the negative input / output terminal 301. The number of the MOS modules 3AU and the like may be different, or the MOS modules 3AU and the like may be arranged only in either the left or right.

  In the above-described embodiment, the case where the four fixing portions 82B are covered with the cover 84 has been described. However, a cutout portion (or a hole) is provided in a part of the cover 84 so that the fixing portion 82B is not covered with the cover 84. It is good also as a structure.

  In the embodiment described above, the thin plate member 82E is included in a part of the housing 82, but the entire housing 82 may be formed using a resin material. Further, in the example shown in FIG. 14, through holes are formed in the thin plate member 82E and the power supply terminals 561 and 562 are passed through the through holes. However, the region where the through holes are formed is insulative instead of the thin plate member 82E. You may make it form with the resin material of. Alternatively, when a through hole is formed in the thin plate member 82E and the power supply terminals 561 and 562 are passed through, the periphery of the power supply terminals 561 and 562 may be covered with an insulating member up to a portion through which the through hole is passed. In this case, if an insulating member that covers the periphery of the power supply terminals 561 and 562 is formed integrally with the brush holder 550, there is no additional component, and thus the cost can be reduced.

  In the above-described embodiment, the control board 102 is positioned using the two power supply terminals 561 and 562 of the brush device 55. However, the control board is used using either one of the two power supply terminals 561 and 562. Positioning 102 may be performed. The present invention can also be applied to a case where a brush device that is grounded to the frame 4 via the fixing terminals 563 and 564 is used. In this case, a power supply terminal having a positive potential may be extended toward the control board 102 along the rotation axis 21 so that electrical connection and positioning with the control board 102 are performed.

  Further, instead of performing direct electrical connection and positioning with respect to the control board 102 using the two power supply terminals 561 and 562 of the brush device 55, this board case 80 is configured by performing electrical connection and positioning with respect to the board case 80. Indirect electrical connection and positioning with respect to the control board 102 accommodated in the control board 102 may be performed. For example, as shown in FIG. 16, through holes are formed in a part of the substrate case, and the substrate case 80 is attached to these through holes through two power supply terminals 561 and 562. In particular, by setting the size of the through-hole formed in the substrate case 80 to be substantially the same as the cross-sectional size of the power supply terminals 561 and 562 (necessary to be slightly increased in consideration of assembly workability), 562 can be engaged with the through hole of the substrate case 80, and the indirect position (rotational direction position and radial position) of the control substrate 102 using the power supply terminals 561 and 562 can be determined. A wiring terminal (not shown) is formed in or around the through hole of the substrate case 80 with which the power supply terminals 561 and 562 are engaged. The wiring terminal and the power supply terminals 561 and 562 are soldered. Thus, electrical connection is made with the H bridge circuit 5 mounted on the control board 102.

  As described above, according to the present invention, the control board on which the rotation angle sensor is mounted is brought into a predetermined position by positioning the control board using the power supply terminal extending from the brush device fixed to the frame. Therefore, it is possible to improve the position detection accuracy using the rotation angle sensor.

8 Control circuit 21 Rotating shaft 22 Permanent magnet 23 Hall IC
24, 26 Slip ring 55 Brush device 102 Control board

Claims (7)

A rotor (20) having a rotation detection magnet (22) attached to an end of the rotation shaft (21);
A stator disposed opposite to the rotor;
A frame (4) for accommodating and holding the rotor and the stator;
A brush device (55) having a pair of brushes (551, 552) fixed to the frame and in sliding contact with slip rings (24, 25) provided on the rotating shaft;
AC voltage induced in the stator windings (1A, 1B) included in the stator is converted into DC voltage, or DC voltage applied from the outside is converted into AC voltage and applied to the stator winding A power converter (3) to
A control board (102) on which a rotation angle sensor (7, 23) disposed opposite to the rotation detection magnet and a control circuit (8) for controlling the power converter are mounted;
A substrate case (80) for housing the control substrate;
And the control board or the board case is electrically connected and positioned using power supply terminals (561, 562) extending from the brush device. In claim 1,
The rotating electrical machine for a vehicle, wherein the power supply terminal is engaged with the substrate case. In claim 1,
The rotating electrical machine for a vehicle, wherein the power supply terminal is engaged with the control board. In claim 2,
The vehicular rotating electrical machine, wherein the power supply terminal extends from the brush device in a direction along the rotation axis, and engages with a through hole formed in the substrate case. In claim 3,
The vehicular rotating electrical machine, wherein the power supply terminal extends from the brush device in a direction along the rotation axis, and engages with a through hole formed in the control board. In any one of Claims 1-5,
The power supply terminal has a plate-like cross section, and a longitudinal direction of the cross section is arranged along a rotation direction of the rotor. In claim 6,
The vehicular rotating electrical machine, wherein the brush device includes two power supply terminals corresponding to the pair of brushes.

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