WO2013065849A1 - Inverter device - Google Patents

Inverter device Download PDF

Info

Publication number
WO2013065849A1
WO2013065849A1 PCT/JP2012/078531 JP2012078531W WO2013065849A1 WO 2013065849 A1 WO2013065849 A1 WO 2013065849A1 JP 2012078531 W JP2012078531 W JP 2012078531W WO 2013065849 A1 WO2013065849 A1 WO 2013065849A1
Authority
WO
WIPO (PCT)
Prior art keywords
bus bar
control board
module
bar module
bus
Prior art date
Application number
PCT/JP2012/078531
Other languages
French (fr)
Japanese (ja)
Inventor
鈴木丈元
近藤竜哉
伊藤康平
Original Assignee
アイシン・エィ・ダブリュ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by アイシン・エィ・ダブリュ株式会社 filed Critical アイシン・エィ・ダブリュ株式会社
Publication of WO2013065849A1 publication Critical patent/WO2013065849A1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2210/00—Converter types
    • B60L2210/40—DC to AC converters
    • B60L2210/42—Voltage source inverters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

Definitions

  • the present invention includes an inverter case, a plurality of switching elements that are arranged along a predetermined element arrangement surface in the inverter case, and that performs power conversion between DC power and AC power, and controls the plurality of switching elements.
  • the present invention relates to an inverter device including a control board.
  • inverter device for example, there is an inverter device for a hybrid vehicle, and downsizing is an important issue in the inverter device.
  • a capacitor module, a cooling device are arranged along a direction orthogonal to an element arrangement surface on which a switching element (power semiconductor element) is arranged.
  • a technique of disposing a water flow path, a power module, a bus bar module (laminated conductor plate), and a control board (control circuit board) in this order is disclosed.
  • An inverter case a plurality of switching elements arranged along a predetermined element arrangement surface in the inverter case for performing power conversion between DC power and AC power, and the plurality of switching elements
  • a control board for controlling the control device comprising: a bus bar module electrically connected to the plurality of switching elements, wherein the control board sandwiches the bus bar module.
  • the bus bar module is fixed to the inverter case via a module fixing part provided in the bus bar module, and the control board is fixed to the board fixing part provided in the bus bar module. It is in the point.
  • the bus bar module is fixed to the inverter case via the module fixing portion provided in the bus bar module” means that the module fixing portion is fixed in a state where the module fixing portion is in contact with the inverter case.
  • a configuration in which the fixing portion is fixed to the inverter case via another member is also included.
  • another member such as a base plate on which the switching element is arranged is fixed to the inverter case, and the bus bar module is indirectly fixed to the inverter case by fixing the module fixing portion to the other member. Includes configuration.
  • control board since the control board is fixed on the bus bar module, it is not necessary to provide a fixing portion for fixing the control board in the inverter case. Therefore, since the fixing part provided in the case can be reduced, further downsizing of the inverter device is facilitated. Further, since the bus bar module and the control board are integrally fixed, it becomes easy to increase the accuracy of the relative position between the bus bar module and the control board.
  • the bus bar module includes a plurality of bus bars and a holding member that integrally holds the plurality of bus bars, and the module fixing portion and the substrate fixing portion are viewed in a direction orthogonal to the element arrangement surface. It is preferable that the holding member is provided in an area different from the bus bar arrangement area where the bus bar is arranged.
  • the module fixing portion and the substrate fixing portion can be provided at a position overlapping the bus bar when viewed along the element arrangement surface. Therefore, it is possible to suppress the module fixing portion and the substrate fixing portion from greatly protruding in a direction orthogonal to the element arrangement surface, and it is easy to reduce the size of the bus bar module.
  • the bus bar module includes a plurality of bus bars and a holding member that integrally holds the plurality of bus bars, and the holding member is a molded body of an insulating material that holds the plurality of bus bars therein, It is preferable that the module fixing portion and the substrate fixing portion are integrally formed.
  • the module fixing portion and the substrate fixing portion can be integrally formed by the molded body of the insulating material constituting the holding member, and the manufacturing cost can be suppressed. Further, since the module fixing portion and the substrate fixing portion are integrally formed on the holding member, it is easy to increase the accuracy of the relative position between the module fixing portion and the substrate fixing portion. Therefore, it becomes easy to increase the accuracy of the relative position between the bus bar module and the control board.
  • a coreless current sensor for detecting a current flowing through the bus bar of the bus bar module is disposed on the control board.
  • the accuracy of the relative position between the bus bar module and the control board can be increased, the relative position between the coreless current sensor arranged on the control board and the bus bar to be detected. Therefore, the current can be measured with high accuracy.
  • a PN terminal electrically connected to the positive and negative bus bars in the bus bar module is provided so as to extend from the bus bar module toward the control board, and a voltage sensor is disposed on the control board. It is preferable that the voltage sensor and the PN terminal are electrically connected in a state where the control board is fixed to the board fixing portion.
  • the PN terminal electrically connected to the positive and negative bus bars is connected to the bus bar module.
  • the positive and negative bus bars can be easily electrically connected to the voltage sensor. . Therefore, it is not necessary to separately provide a connection wiring for connecting the PN terminal and the voltage sensor, and it is possible to reduce the manufacturing cost by suppressing the labor of the wiring.
  • a flexible printed circuit board that electrically connects the switching element and the control board arranged with the bus bar module interposed therebetween, the bus bar module includes a part of the flexible printed circuit board in the extending direction, It is preferable that a through hole surrounding the periphery of the flexible printed board is provided.
  • the “flexible printed circuit board” is a printed circuit board having flexibility, and is used in the present application as a concept including a flexible cable that simply functions as wiring.
  • the movement of the flexible printed circuit board in the direction intersecting the bus bar module can be regulated by the wall surface of the through hole. Therefore, it can suppress that a flexible printed circuit board is rubbed and damaged with the wall surface and other member of an inverter case by a vibration.
  • FIG. 1 is a perspective view of a vehicle drive device and an inverter device mounted on a vehicle. It is a schematic diagram which shows the structure of an inverter circuit. It is a disassembled perspective view of an inverter apparatus. It is a disassembled perspective view of an inverter module. It is the top view which looked at the inverter apparatus from the direction orthogonal to a cooling surface. It is sectional drawing of an inverter apparatus. It is a schematic diagram which shows the state which mounted the inverter apparatus in the vehicle. It is the top view which looked at the inverter apparatus from the direction orthogonal to a cooling surface.
  • an inverter device 1 in a system that controls a rotating electrical machine 3 that functions as a driving force source for wheels of a hybrid vehicle V will be described as an example.
  • the hybrid vehicle V (hereinafter referred to as “vehicle V”) includes an internal combustion engine 61, a vehicle drive device 62 having a rotating electrical machine 3, an inverter device 1, a battery 2, It has.
  • the inverter device 1 includes an inverter circuit 7 (see FIG. 2), and controls the rotating electrical machine 3 that is an external device when viewed from the inverter device 1.
  • the rotating electrical machine 3 is an AC motor driven by a three-phase AC.
  • the rotating electrical machine 3 can perform both a function as a motor (electric motor) that generates power upon receiving power supply and a function as a generator (generator) that generates power upon receiving power supply. It is possible.
  • the vehicle drive device 62 includes an internal combustion engine case 63 that houses the internal combustion engine 61 and a rotating electrical machine case 64 that houses the rotating electrical machine 3.
  • the inverter device 1 is integrally fixed to a rotating electrical machine case 64.
  • the inverter device 1 includes an inverter case 5 (hereinafter referred to as “case 5”) that accommodates the components of the inverter including the inverter module 6.
  • the case 5 is formed as a separate body from the rotating electrical machine case 64 and is configured to be integrally fixed to the rotating electrical machine case 64.
  • the inverter device 1 is connected to a rotating electrical machine 3 as a driving force source of the vehicle V and a battery 2 as a DC power source as an energy source thereof.
  • the inverter device 1 is further connected to an electrical component 101 and a radiator 102 provided in the vehicle V.
  • the inverter circuit 7 is configured by using a plurality (six in this example) of switching elements 14.
  • the switching element 14 is an electronic element for performing power conversion between DC power and AC power, and forms the core of the inverter circuit 7 and the inverter device 1.
  • the inverter circuit 7 is configured by a bridge circuit, and two switching elements 14 are connected in series between the positive electrode P side of the battery 2 and the negative electrode N side (for example, the ground side) of the battery 2. These series circuits are connected in parallel in three lines.
  • the inverter circuit 7 has a three-leg configuration including three legs each having a switching element 14 constituting an upper arm connected to the positive electrode P side and a switching element 14 constituting a lower arm connected to the negative electrode N side. Has been. Each leg corresponds to each of the three phases (U phase, V phase, W phase) of the coil 3 b (stator coil) of the rotating electrical machine 3.
  • reference numeral 14a is a U-phase upper switching element
  • reference numeral 14b is a V-phase upper switching element
  • reference numeral 14c is a W-phase upper switching element
  • Reference numeral 14d is a U-phase lower stage switching element
  • reference numeral 14e is a V-phase lower switching element
  • reference numeral 14f is a W-phase lower switching element.
  • “upper stage side” represents an arm on the positive electrode P side
  • “lower stage side” represents an arm on the negative electrode N side.
  • the collectors of the upper switching elements 14a, 14b, 14c of each phase are connected to the positive electrode P side via the fourth bus bar 23d, and the emitters of the lower switching elements 14d, 14e of each phase via the bus bars 23a, 23b, 23c. , 14f.
  • the emitters of the lower switching elements 14d, 14e, and 14f of each phase are connected to the negative electrode N side via the fifth bus bar 23e.
  • a diode element 15 is connected in parallel between the emitter and collector of each switching element 14.
  • the diode element 15 has an anode connected to the emitter of the switching element 14 and a cathode connected to the collector of the switching element 14.
  • the diode element 15 is used as FWD (Free Wheel Diode).
  • Each arm including the pair of switching elements (14a, 14d), (14b, 14e), (14c, 14f) and the corresponding bus bars 23a, 23b, 23c is connected to the rotating electrical machine connection terminals 25a, It is connected to the coil 3b of each phase of the rotating electrical machine 3 through 25b and 25c. And the gate of each switching element 14 is connected to the drive circuit (illustration omitted) provided in the control board 41 via the flexible printed circuit board 19, and each switching control is carried out.
  • the inverter device 1 including such an inverter circuit 7 controls each switching element 14 based on a required rotational speed and a required torque required for the rotating electrical machine 3 (for example, pulse width modulation control), whereby the battery 2 Is converted into three-phase AC power and supplied to the rotating electrical machine 3. As a result, the rotating electrical machine 3 performs powering according to the required rotational speed and the required torque.
  • the inverter device 1 controls each switching element 14 to convert the generated three-phase AC power into direct current.
  • the battery 2 is charged by converting into electric power.
  • the inverter device 1 includes an inverter module 6, a DC power smoothing capacitor 31, and a control board 41 for controlling operations of the switching element 14 and the like. These are accommodated in a case 5 formed in a rectangular parallelepiped shape.
  • the inverter module 6 is a module on which an inverter circuit 7 is mounted, and is interposed in an electric circuit between the battery 2 and the rotating electrical machine 3 as shown in FIG.
  • a capacitor 31 is further interposed between the battery 2 and the inverter module 6.
  • the inverter module 6 that is a component of the inverter device 1 includes a plurality of switching elements 14, a base plate 11 having an element mounting surface 11 a on which the plurality of switching elements 14 are mounted, and a plurality of switching elements 14.
  • the bus bar module 20 having the bus bar 23 is provided as a main component.
  • the switching element 14 is a member for performing power conversion between DC power and AC power
  • the bus bar 23 is for electrically connecting the plurality of switching elements 14 to form the inverter circuit 7. It is a member.
  • the element mounting surface 11a in the present embodiment corresponds to the “element arrangement surface” in the present invention.
  • the base plate 11 is a plate-like member that serves as a base on which the switching element 14 is placed.
  • the base plate 11 is made of a metal material such as copper or aluminum.
  • the insulating member 12 and the element substrate 13 are stacked on the element mounting surface 11a of the base plate 11 in a state of being parallel to each other.
  • This stacking direction is a direction Z (hereinafter simply referred to as “orthogonal direction Z”) orthogonal to the element mounting surface 11a.
  • orthogonal direction Z the direction from the element mounting surface 11a toward the control substrate 41 is orthogonal
  • the direction is called Z1 and the opposite direction is called orthogonal second direction Z2.
  • the insulating member 12 is composed of a sheet-like member having both electrical insulation and thermal conductivity, and is a resin sheet member in this example.
  • the element substrate 13 is made of a conductive material (for example, a metal material such as copper or aluminum), and is bonded and fixed to the base plate 11 via the insulating member 12 by thermocompression bonding.
  • the element substrate 13 is made of a material different from the base plate 11 as a separate member. This element substrate 13 also functions as a heat spreader.
  • one insulating member 12 is disposed on the base plate 11, and a plurality (six in this example) of element substrates 13 are disposed on the insulating member 12.
  • the plurality of element substrates 13 are arranged in a line along one direction (long side direction Y described later).
  • the plurality of element substrates 13 are arranged so that the short side direction of each element substrate 13 is parallel to the arrangement direction (long side direction Y) of the plurality of element substrates 13, that is, the length of the plurality of element substrates 13.
  • the sides are arranged in parallel directions.
  • one switching element 14 and one diode element 15 are mounted on the upper surface of each element substrate 13.
  • the six switching elements 14 and the six diode elements 15 are provided on the element mounting surface 11 a of the base plate 11 via the insulating member 12 and the element substrate 13.
  • the inverter circuit 7 includes the switching element 14 and the diode element 15.
  • an IGBT insulated gate gate bipolar transistor
  • MOSFET metal-oxide-semiconductor-field-effect-transistor
  • the switching element 14 and the diode element 15 placed on the same element substrate 13 are aligned along one direction (a short side direction X described later). It is arranged adjacent to each other.
  • the switching element 14 is disposed in a predetermined rectangular region R of the element mounting surface 11a along the element mounting surface 11a.
  • the rectangular region R is provided between the rotating electrical machine connection terminal 25 and the capacitor connection terminal 33.
  • the long side direction of the rectangular region R is represented by Y
  • the short side direction is represented by X.
  • the direction of each side of the rectangular region R is referred to as “short side direction X” and “long side direction Y”.
  • the right side in FIG. 5 is referred to as “short side first direction X1”
  • the left side is referred to as “short side second direction X2”.
  • the upper side in FIG. 5 is referred to as “long side first direction Y1”, and the lower side is referred to as “long side second direction Y2”.
  • six switching elements 14 are arranged so as to be arranged along the long side direction Y.
  • the first electrode member 17 is disposed in a state where the upper surface (emitter electrode) of the switching element 14 and the upper surface (anode electrode) of the diode element 15 are electrically connected.
  • the first electrode member 17 is bent and formed using a band-shaped member (plate-shaped member) having a constant width.
  • a second electrode member 18 is placed on the upper surface of the element substrate 13.
  • the second electrode member 18 electrically connects the lower surface (collector electrode) of the switching element 14 and the lower surface (cathode electrode) of the diode element 15 via the element substrate 13.
  • the second electrode member 18 is a block-shaped member in this example.
  • Both the first electrode member 17 and the second electrode member 18 are made of a conductive material (for example, a metal material such as copper or aluminum).
  • each leg of the inverter circuit 7 is configured by the two-electrode member 18 and the bus bars 23a, 23b, and 23c (hereinafter sometimes simply referred to as “diode element 15 etc.”).
  • each upper stage arm of the inverter circuit 7 is comprised by the switching elements 14a, 14b, and 14c and the corresponding diode elements 15 and the like.
  • each lower arm of the inverter circuit 7 is configured by the switching elements 14d, 14e, and 14f and the corresponding diode elements 15 and the like.
  • heat radiating fins 11b are provided on the opposite side of the base plate 11 from the element mounting surface 11a.
  • the heat radiating fins 11 b are formed integrally with the base plate 11.
  • the heat radiating fins 11 b radiate the heat of the switching element 14 (heat generated with the switching operation) transmitted to the base plate 11 through the element substrate 13 and the insulating member 12 from the surface thereof.
  • the radiating fins 11b are arranged in a direction Z (hereinafter simply referred to as "orthogonal direction Z") perpendicular to the surface from the surface opposite to the element mounting surface 11a of the base plate 11. It consists of fins standing upright.
  • the heat radiating fins 11 b are pin fins configured with a plurality of rod-shaped members standing in the orthogonal direction Z.
  • the heat radiation fin 11b may be formed in a flat plate shape that protrudes in the orthogonal direction Z and extends along one direction (long-side direction Y described later).
  • the base plate 11 is disposed so as to be in contact with the cooling path constituting member 110 provided in the case 5.
  • the cooling path constituting member 110 is a member that extends along a plane parallel to the element mounting surface 11 a of the base plate 11, and is formed integrally with the case 5.
  • the cooling path constituting member 110 may be formed separately from the case 5 and fixed to the inner wall of the case 5.
  • the cooling path constituting member 110 includes a recess 111 on the surface on the side where the base plate 11 contacts.
  • the recess 111 serves as a cooling water flow path in a state where the base plate 11 is attached to the cooling path constituting member 110.
  • the recess 111 is formed so as to have a space that can accommodate the heat dissipating fins 11 b of the base plate 11.
  • Cooling water circulation pipes 112 a and 112 b from the outside of the case 5 are connected to the recess 111. Then, the cooling water is introduced into the recess 111 from one of these cooling water circulation pipes 112 a and 112 b, and the cooling water is discharged out of the case 5 from the other. With such a configuration, the base plate 11 can be cooled by the cooling water.
  • the bus bar module 20 that is a component of the inverter device 1 includes a plurality of bus bars 23 and a connection support 21 that integrally holds the plurality of bus bars 23 as main components. Furthermore, a rotating electrical machine connection terminal 25 that electrically connects the switching element 14 and the rotating electrical machine 3 and a capacitor connection terminal 33 that electrically connects at least the capacitor 31 and the switching element 14 are provided. The rotating electrical machine connection terminal 25 and the capacitor connection terminal 33 are formed integrally with the bus bar 23 and constitute a part of the bus bar module 20.
  • the connection support 21 in the present embodiment corresponds to a “holding member” in the present invention.
  • the bus bar module 20 is disposed on the opposite side of the base plate 11 with respect to the plurality of switching elements 14. That is, these components are arranged in the order of the bus bar module 20, the switching element 14, and the base plate 11 from the rotating electrical machine 3 side along the orthogonal direction Z.
  • connection support 21 shown in FIGS. 4 to 6 is a structure that integrally supports a plurality of bus bars 23.
  • the connection support body 21 is formed of a molded body of an insulating material that holds a plurality of bus bars 23 inside.
  • the connection support 21 is directly fixed to the case 5.
  • the connection support 21 is fixed to the element mounting surface 11 a side of the base plate 11 by a fastening member such as a bolt, and is indirectly fixed to the case 5 by fixing the base plate 11 to the case 5. May be.
  • connection support 21 is provided with a module fixing portion 27, and the module fixing portion 27 is directly fixed to the case 5 by a fastening member such as a bolt. Further, the connection support 21 is provided with a substrate fixing portion 26, and the control substrate 41 is fixed to the substrate fixing portion 26 with a fastening member such as a bolt. That is, the control board 41 is fixed to the base plate 11 and the case 5 through the connection support 21.
  • the bus bar module 20 includes five bus bars 23 including a first bus bar 23a, a second bus bar 23b, a third bus bar 23c, a fourth bus bar 23d, and a fifth bus bar 23e.
  • Each bus bar 23 is made of a conductive material (for example, a metal material such as copper or aluminum), and is bent into a predetermined shape using a flat plate member in this example.
  • the first bus bar 23a, the second bus bar 23b, and the third bus bar 23c are respectively connected to the switching element 14 and the diode element of the upper arm via the first electrode member 17 (see FIG. 4).
  • 15 is an electrical connection member that electrically connects 15 and the rotating electrical machine connection terminal 25.
  • the first bus bar 23a, the second bus bar 23b, and the third bus bar 23c are connected to the lower arm switching element 14 and the diode element 15 and the rotating electrical machine connection terminal 25 via the second electrode member 18 (see FIG. 4). Electrical connection between them.
  • the bus bars 23a, 23b, and 23c extend along the short side direction X as a whole.
  • the fourth bus bar 23d is electrically connected between the switching element 14 and the diode element 15 of the upper arm via the second electrode member 18 (see FIG. 4) and the positive DC terminal 34a which is the DC terminal 34 on the positive P side. It is an electrical connection member connected to.
  • the fifth bus bar 23e is electrically connected between the switching element 14 and the diode element 15 of the lower arm via the first electrode member 17 (see FIG. 4) and the negative DC terminal 34b which is the negative DC terminal 34. It is an electrical connection member connected to.
  • the bus bars 23d and 23e extend along the long side direction Y as a whole.
  • each bus bar 23 and the first electrode member 17 and the second electrode member 18 is formed integrally with each bus bar 23 and is a plurality of joints supported by the connection support 21.
  • the portion 24 is realized by being bonded to the upper surface of the first electrode member 17 and the upper surface of the second electrode member 18 in a pressed state.
  • each bus bar 23 and the first electrode member 17 and the second electrode member 18 are joined by laser welding using a YAG laser, a CO2 laser, a semiconductor laser, or the like.
  • the rotating electrical machine connection terminal 25 is a terminal for inputting / outputting AC power to / from the rotating electrical machine 3 as a driving force source of the vehicle V.
  • three-phase rotary electric machine connection terminals 25a, 25b, and 25c are provided as such rotary electric machine connection terminals 25.
  • the U-phase rotating electrical machine connection terminal 25a is formed integrally with the first bus bar 23a at the end portion on the short side first direction X1 side of the first bus bar 23a.
  • the V-phase rotating electrical machine connection terminal 25b is formed integrally with the end portion of the second bus bar 23b on the short side first direction X1 side
  • the W-phase rotating electrical machine connection terminal 25c is formed on the short side of the third bus bar 23c.
  • These three rotating electrical machine connection terminals 25 a, 25 b, 25 c are arranged in order along a direction parallel to the long side direction Y according to the arrangement of the three legs constituting the inverter circuit 7.
  • the long side direction Y coincides with the direction orthogonal to the rotating shaft 3a of the rotating electrical machine 3, and thus the three rotating electrical machine connection terminals 25a, 25b, 25c They are arranged in order along the direction orthogonal to the rotation axis 3a.
  • the capacitor 31 is provided in parallel between the battery 2 and the inverter module 6 and smoothes the DC power between them.
  • the capacitor 31 includes a case portion 31a and a capacitor element 31b.
  • the case portion 31 a is formed so as to cover both sides in the short side direction X, both sides in the long side direction Y, and one side in the orthogonal direction Z. Specifically, when viewed from the orthogonal direction Z, it is formed in a rectangular bathtub shape.
  • a power supply terminal for inputting / outputting DC power to / from the battery 2 and a DC terminal 35 for inputting / outputting DC power to / from the switching element 14 are located at predetermined positions with respect to the case portion 31a.
  • the capacitor 31 is disposed on the opposite side of the plurality of switching elements 14 with the base plate 11 interposed therebetween. That is, these components are arranged in the order of the switching element 14, the base plate 11, and the capacitor 31 from the rotating electrical machine 3 side along the orthogonal direction Z.
  • Control Board 41 mainly has a function for controlling the operation of the switching element 14. Therefore, the control board 41 is provided with a drive circuit (not shown) for individually controlling switching of at least the switching elements 14. In the present embodiment, the control board 41 is also provided with a voltage detection circuit for detecting a voltage between both electrodes between the bus bar 23d and the bus bar 23e. In addition, the control board 41 is also provided with a current detection circuit for detecting an alternating current flowing through the bus bars 23a, 23b, 23c, a temperature detection circuit for detecting the temperature of the switching element 14, and the like.
  • control board 41 is disposed on the opposite side of the plurality of switching elements 14 with the bus bar module 20 interposed therebetween. That is, these components are arranged in the order of the control board 41, the bus bar module 20, and the switching element 14 from the rotating electrical machine 3 side along the orthogonal direction Z orthogonal to the element mounting surface 11a.
  • the control board 41 is provided with a plurality of supported portions 82 for fixing the control board 41 on the bus bar module 20.
  • the supported portion 82 is provided at a position corresponding to the board fixing portion 26 of the bus bar module 20 when viewed in the orthogonal direction Z.
  • a plurality of (9 in this example) through-holes in the orthogonal direction Z are provided as the supported portion 82, and the control board 41 is fixed to a fixing member (for example, a bolt) via the through-holes. Is fixed to the bus bar module 20.
  • Some of these supported portions 82 are provided along the long side direction Y on the short side first direction X1 side of the control substrate 41. Specifically, four supported portions 82a to 82d are provided at equal intervals on the short side first direction X1 side of the control board 41, and a sensor described later is provided between these four supported portions 82. And connectors are arranged.
  • the bus bar module 20 is fixed to the case 5 via a module fixing portion 27 provided in the bus bar module 20.
  • the module fixing part 27 is a cylindrical part having a through hole in the orthogonal direction Z. It is fixed to the case 5 by a support member (for example, a bolt) through the through hole.
  • the surface of the module fixing portion 27 on the orthogonal first direction Z1 side is a predetermined distance or more than the surface of the substrate fixing portion 26 on the orthogonal first direction Z1 side (here, the thickness of the bolt head in the orthogonal direction Z).
  • the plurality of module fixing portions 27 are provided on the short side first direction X1 side of the bus bar module 20 so as to sandwich the rotating electrical machine connection terminal 25 along the long side direction Y. Specifically, a plurality of four module fixing portions 27 are provided at equal intervals along the long side direction Y on the short side first direction X1 side of the bus bar module 20.
  • the rotating electrical machine connection terminals 25a to 25c are arranged one by one.
  • a plurality of module fixing portions 27 are provided on the short-side second direction X2 side of the bus bar module 20 so as to sandwich the capacitor connection terminal 33 along the long-side direction Y.
  • three module fixing portions 27 are provided on the short side second direction X2 side of the bus bar module 20, and two capacitor connection terminals 33 are arranged between the three module fixing portions 27. Has been.
  • the bus bar module 20 is provided with a board fixing portion 26 for fixing the control board 41 on the bus bar module 20.
  • the control board 41 is fixed to the board fixing part 26.
  • a cylindrical portion that protrudes in the first orthogonal direction Z ⁇ b> 1 with respect to the bus bar module 20 is provided as the substrate fixing portion 26.
  • the cylindrical portion is formed such that a gap is formed between the control board 41 and the bus bar module 20 in a state where the control board 41 is fixed. For this reason, it is possible to mount various elements such as a current sensor on the surface of the control board 41 on the second orthogonal direction Z2 side.
  • the board fixing portion 26 is provided with screw holes in the orthogonal direction Z, and the control board 41 is fixed by a fixing member (for example, a bolt).
  • a plurality (nine in this example) of board fixing portions 26 are provided in the bus bar module 20 at positions different from the module fixing portion 27 when viewed in the orthogonal direction Z.
  • a plurality of substrate fixing portions 26 are provided along the long side direction Y on the short side first direction X1 side of the bus bar module 20.
  • a plurality of substrate fixing portions 26 are arranged at equal intervals along the long-side direction Y on the short-side first direction X1 side.
  • each of the plurality of board fixing portions 26 is adjacent to the short-side second direction X2 side of the module fixing portion 27, and in the long-side direction Y. It is arranged in a line along.
  • connection terminals 25a to 25c are arranged one by one.
  • five substrate fixing portions 26 are provided on the short side second direction X2 side of the bus bar module 20.
  • the board fixing part 26 and the module fixing part 27 are provided in a region different from the bus bar arrangement area where the bus bars 23 (23a to 23e) are arranged in the connection support 21 when viewed in the orthogonal direction Z.
  • the board fixing part 26 and the module fixing part 27 are distributed and arranged outside the bus bar arrangement area so as not to interfere with the bus bar 23.
  • connection support 21 is a molded body of an insulating material that holds a plurality of bus bars 23a to 25e therein.
  • the substrate fixing part 26 and the module fixing part 27 are formed integrally with the connection support 21.
  • the connection support 21 is formed by injection molding a synthetic resin around the bus bars 23a to 25e so that the plurality of bus bars 23a to 25e are arranged inside. At this time, in this example, injection molding is performed in a state where a cylindrical member, a nut member, or the like is embedded in a position corresponding to each of the substrate fixing portion 26 and the module fixing portion 27, and Is integrally formed with the connection support 21.
  • control board 41 can be fixed to the bus bar module 20 with high accuracy.
  • the inverter device 1 utilizes the fact that the accuracy of the relative position between the bus bar module 20 and the control board 41 can be increased.
  • the components mounted on the module 20 and the control board 41 have the following characteristic configuration.
  • the control board 41 is provided with a coreless current sensor 91 that detects a current flowing through the bus bar 23.
  • the coreless current sensor 91 is arranged on the surface of the control board 41 on the orthogonal second direction Z2 side so as to correspond to the position of the bus bar 23 connected to the rotating electrical machine connection terminal 25 provided in the bus bar module 20.
  • one current sensor 91a to 91c is provided for each of the bus bars 23a to 23c connected to the rotating electrical machine connection terminals 25a to 25c of the U, V, and W phases.
  • Each current sensor 91 is disposed so as to overlap with each bus bar 23 in the orthogonal direction Z with a predetermined interval.
  • one coreless current sensor 91 is disposed along the long side direction Y between the supported portions 82a to 82d.
  • the supported portions 82 and the substrate fixing portions 26 corresponding to the supported portions 82 are arranged at equal intervals along the long-side direction Y direction. Therefore, the control board 41 on which the coreless current sensors 91a to 91c are arranged has the bus bar module 20 on both sides in the long side direction Y of each of the coreless current sensors 91a to 91c arranged one by one between the supported portions 82a to 82d. It is supported by.
  • the current sensors 91a to 91c are supported by the bus bar module 20 on both sides in the long side direction Y. Therefore, it is possible to reduce the deflection in the orthogonal direction Z of the portion of the control board 41 to which the current sensors 91a to 91c are attached.
  • the plurality of supported portions 82a to 82d are arranged at equal intervals, and each of the plurality of current sensors 91a to 91c is adjacent to each other. It is arranged in the middle of the supported portion 82.
  • the coreless current sensor 91 is a non-contact current sensor that detects an AC current in a non-contact manner with respect to an AC power line such as the bus bars 23a, 23b, and 23c without using a shunt resistor or the like.
  • the coreless current sensor 91 is a sensor that detects an alternating current without using a magnetic core that circulates around the bus bar 23.
  • the positive voltage detection terminal 36 electrically connected to the positive bus bar 23d in the bus bar module 20 and the negative bus bar 23e are electrically connected.
  • a negative electrode voltage detection terminal 37 is provided so as to extend in the orthogonal first direction Z1.
  • the positive voltage detection terminal 36 and the negative voltage detection terminal 37 in the present embodiment correspond to the “PN terminal” in the present invention.
  • the positive voltage detection terminal 36 and the negative voltage detection terminal 37 are rod-like conductive members extending from the bus bars 23d and 23e to the orthogonal first direction Z1 side.
  • the control board 41 is provided with a positive electrode connecting portion 87 and a negative electrode connecting portion 88.
  • the positive electrode connecting portion 87 and the negative electrode connecting portion 88 are through holes (through holes) penetrating the control board 41 in the orthogonal direction Z.
  • the positive electrode voltage detection terminal 36 and the negative electrode voltage detection terminal 37 are provided at positions overlapping the positive electrode connection portion 87 and the negative electrode connection portion 88 in the orthogonal direction Z, and their tips are orthogonal to the connection support 21. It protrudes in one direction Z1.
  • the positive electrode voltage detection terminal 36 and the negative electrode voltage detection terminal 37 are connected to the positive electrode connection part 87 provided on the control board 41 in a state where the control board 41 is fixed to the board fixing part 26 of the bus bar module 20. It is formed so as to be inserted into the negative electrode connecting portion 88.
  • the positive electrode voltage detection terminal 36 is soldered to the positive electrode connection portion 87, and the negative electrode voltage detection terminal 37 is soldered to the negative electrode connection portion 88.
  • a voltage sensor (not shown) is disposed on the control board 41, and the positive electrode connecting portion 87 and the negative electrode connecting portion 88 are electrically connected to the voltage sensor. For this reason, when the tips of the positive voltage detection terminal 36 and the negative voltage detection terminal 37 are electrically connected to the positive electrode connection part 87 and the negative electrode connection part 88 in a state where the control board 41 is fixed to the board fixing part 26, The positive voltage detection terminal 36 and the negative voltage detection terminal 37 are electrically connected to the voltage sensor. With such a configuration, the voltage of the bus bar 23 can be input from the bus bars 23d and 23e to the voltage sensor on the control board 41 at the shortest distance. Based on the output signal of the voltage sensor, the DC voltage applied to the inverter circuit 7 can be detected.
  • the inverter device 1 includes a flexible printed circuit board 19 for electrically connecting the switching element 14 disposed across the bus bar module 20 and the connection terminal 95 disposed on the control board 41. ing. One end of the flexible printed board 19 is electrically connected to the switching element 14, and the other end is connected to a connection terminal 95 disposed on the control board 41.
  • the inverter device 1 includes six flexible printed boards 19a to 19f and six connection terminals 95a to 95f corresponding to the six switching elements 14a to 14f, respectively.
  • each switching element 14 is connected to the control board 41 via the flexible printed circuit board 19 and individually according to a signal from a drive circuit provided on the control board 41. Switching control is performed.
  • the switching element 14 of the present embodiment is a composite element provided with an abnormality detection sensor for detecting element abnormality such as element temperature and overcurrent, and the control board 41 has an abnormality corresponding to the abnormality detection sensor.
  • a detection circuit is provided. That is, the connection terminal 95 disposed on the control board 41 also serves to electrically connect the abnormality detection circuit and the switching element 14.
  • the bus bar module 20 includes a through hole 28 that surrounds the periphery of the flexible printed circuit board 19 in a part of the extending direction of the flexible printed circuit board 19. ing. That is, in the present embodiment, the flexible printed circuit board 19 connects the switching element 14 and the connection terminal 95 through the through hole 28.
  • a plurality of through holes 28 are provided along the long side direction Y on the short side first direction X1 side of the bus bar module 20.
  • the through hole 28 is provided in a region different from the region in which the substrate fixing portion 26 and the bus bar 23 are disposed when viewed in the orthogonal direction Z. Further, the through holes 28a to 28f are provided at positions overlapping the corresponding switching elements 14a to 14f when viewed in the short side direction X, respectively.
  • connection terminals 95 are provided along the long side direction Y on the short side first direction X1 side of the bus bar module 20.
  • the connection terminal 95 is provided in a region different from the region where the supported portion 82 and the coreless current sensor 91 are disposed when viewed in the orthogonal direction Z.
  • connection terminals 95a to 95f and the through holes 28a to 28f are arranged so as to overlap each other when viewed in the orthogonal direction Z.
  • the inverter device 1 regulates the movement of the flexible printed circuit board 19 in the short side direction X and the long side direction Y by the wall surface of the through hole 28 provided in the bus bar module 20.
  • the switching element 14 and the connection terminals 95a to 95f can be connected at a short distance.
  • the case where the inverter case 5 is formed separately from the rotating electrical machine case 64 has been described as an example.
  • the embodiment of the present invention is not limited to this. That is, at least a part of the inverter case 5 may be configured integrally with the rotating electrical machine case 64.
  • the board fixing part 26 and the module fixing part 27 are provided in a region different from the bus bar arrangement region where the bus bar 23 in the connection support 21 is arranged when viewed in the orthogonal direction Z.
  • the case has been described as an example.
  • the embodiment of the present invention is not limited to this. That is, at least one of the substrate fixing part 26 and the module fixing part 27 may be provided in an area overlapping with the bus bar arrangement area where the bus bar 23 is arranged in the connection support 21 when viewed in the orthogonal direction Z.
  • connection support body 21, the board fixing part 26, and the module fixing part 27 are integrally formed has been described as an example.
  • the embodiment of the present invention is not limited to this. That is, at least one of the substrate fixing part 26 and the module fixing part 27 may be formed of a member separate from the connection support 21.
  • the coreless current sensor 91 is disposed on the control board 41 .
  • the embodiment of the present invention is not limited to this. That is, instead of the coreless current sensor 91, a cored current sensor including a magnetic flux collecting core that circulates around the bus bar 23 may be used. In this case, the current sensor may be arranged on the control board 41, but may be arranged separately from the control board 41.
  • the positive electrode connection portion 87 and the negative electrode connection portion 88 may include a connection terminal corresponding to the positive voltage detection terminal 36 and the negative voltage detection terminal 37 on the surface on the orthogonal second direction Z2 side of the control board 41. Moreover, it is good also as a structure which does not provide such a positive voltage detection terminal 36 and a negative voltage detection terminal 37, but detects a DC voltage by another method.
  • the bus bar module 20 includes the through hole 28
  • the embodiment of the present invention is not limited to this. That is, the bus bar module 20 may not be provided with the through hole 28 and the flexible printed circuit board 19 may be configured to pass between the bus bar module 20 and the wall surface of the case 5. Further, the switching element 14 and the control board 41 may be connected by a wiring other than the flexible printed board 19.
  • An inverter case a plurality of switching elements arranged along a predetermined element arrangement surface in the inverter case for performing power conversion between DC power and AC power, and control for controlling the plurality of switching elements
  • an inverter device provided with a substrate.
  • Inverter device 5 Inverter case 11a: Element placement surface (element placement surface) 14: Switching element 19: Flexible printed circuit board 20: Bus bar module 21: Connection support (holding member) 23: Bus bar 26: Board fixing part 27: Module fixing part 28: Through hole 36: Positive voltage detection terminal (PN terminal) 37: Negative voltage detection terminal (PN terminal) 41: Control board 91: Coreless current sensor Z: Orthogonal direction (direction orthogonal to the element arrangement surface)

Abstract

Optimization of a fixing method for a control board and increased compactness of an inverter device is desired. An inverter device comprising a busbar module (20) electrically connected to a plurality of switching elements (14), wherein: a control board (41) is arranged on the opposite side to the plurality of switching elements (14), having the busbar module (20) sandwiched therebetween; the busbar module (20) is fixed to an inverter case (5) via a module fixing section (27) provided in the busbar module (20); and the control board (41) is fixed to a board fixing section (26) provided in the busbar module (20).

Description

インバータ装置Inverter device
　本発明は、インバータケースと、前記インバータケース内において所定の素子配置面に沿って配置され、直流電力と交流電力との間の電力変換を行う複数のスイッチング素子と、前記複数のスイッチング素子を制御する制御基板と、を備えたインバータ装置に関する。 The present invention includes an inverter case, a plurality of switching elements that are arranged along a predetermined element arrangement surface in the inverter case, and that performs power conversion between DC power and AC power, and controls the plurality of switching elements. The present invention relates to an inverter device including a control board.
　上記のようなインバータ装置としては、例えば、ハイブリッド車両用のインバータ装置などがあり、当該インバータ装置において小型化は重要な課題である。インバータ装置の小型化に関する技術として、例えば下記の特許文献１の図４及び図６には、スイッチング素子（パワー半導体素子）が配置された素子配置面に直交する方向に沿って、コンデンサモジュール、冷却水流路、パワーモジュール、バスバーモジュール（積層導体板）、制御基板（制御回路基板）の順に配置する技術が開示されている。 As the above inverter device, for example, there is an inverter device for a hybrid vehicle, and downsizing is an important issue in the inverter device. As a technique related to downsizing of the inverter device, for example, in FIG. 4 and FIG. 6 of Patent Document 1 below, a capacitor module, a cooling device are arranged along a direction orthogonal to an element arrangement surface on which a switching element (power semiconductor element) is arranged. A technique of disposing a water flow path, a power module, a bus bar module (laminated conductor plate), and a control board (control circuit board) in this order is disclosed.
　しかし、特許文献１の技術では、制御基板とパワーモジュールとをそれぞれケースに対して固定する必要があるために、これらの素子配置面に沿った方向にインバータ装置が大きくなる上、制御基板とバスバーモジュールやパワーモジュールとの相対位置精度を上げることが難しいという問題があった。また、特許文献１の技術では、インバータ装置は回転電機のケースに固定できるほどには小型化されていなかった。 However, in the technique of Patent Document 1, since it is necessary to fix the control board and the power module to the case, the inverter device becomes large in the direction along these element arrangement surfaces, and the control board and the bus bar There was a problem that it was difficult to raise the relative positional accuracy with the module and the power module. Moreover, in the technique of patent document 1, the inverter apparatus was not reduced in size so that it could be fixed to the case of a rotary electric machine.
特開２０１０－１８３７４８号公報JP 2010-183748 A
　そこで、制御基板の固定方法を最適化してインバータ装置の更なる小型化を実現することが望まれる。 Therefore, it is desired to optimize the fixing method of the control board and realize further downsizing of the inverter device.
　本発明に係るインバータケースと、前記インバータケース内において所定の素子配置面に沿って配置され、直流電力と交流電力との間の電力変換を行うための複数のスイッチング素子と、前記複数のスイッチング素子を制御する制御基板と、を備えたインバータ装置の特徴構成は、前記複数のスイッチング素子と電気的に接続されるバスバーモジュールを備え、前記制御基板が、前記バスバーモジュールを挟んで前記複数のスイッチング素子とは反対側に配置され、前記バスバーモジュールが、当該バスバーモジュールに設けられたモジュール固定部を介して前記インバータケースに固定され、前記制御基板が、前記バスバーモジュールに設けられた基板固定部に固定されている点にある。なお、「バスバーモジュールが、当該バスバーモジュールに設けられたモジュール固定部を介してインバータケースに固定される」とは、モジュール固定部がインバータケースに接する状態で固定される構成の他にも、モジュール固定部が別の部材を介してインバータケースに固定される構成も含む。例えば、スイッチング素子が配置されたベースプレートなどの他の部材がインバータケースに固定されており、当該他の部材にモジュール固定部が固定されることにより、バスバーモジュールが間接的にインバータケースに固定される構成も含む。 An inverter case according to the present invention, a plurality of switching elements arranged along a predetermined element arrangement surface in the inverter case for performing power conversion between DC power and AC power, and the plurality of switching elements And a control board for controlling the control device, comprising: a bus bar module electrically connected to the plurality of switching elements, wherein the control board sandwiches the bus bar module. The bus bar module is fixed to the inverter case via a module fixing part provided in the bus bar module, and the control board is fixed to the board fixing part provided in the bus bar module. It is in the point. Note that “the bus bar module is fixed to the inverter case via the module fixing portion provided in the bus bar module” means that the module fixing portion is fixed in a state where the module fixing portion is in contact with the inverter case. A configuration in which the fixing portion is fixed to the inverter case via another member is also included. For example, another member such as a base plate on which the switching element is arranged is fixed to the inverter case, and the bus bar module is indirectly fixed to the inverter case by fixing the module fixing portion to the other member. Includes configuration.
　この特徴構成によれば、制御基板はバスバーモジュール上に固定されるため、インバータケースに、制御基板を固定するための固定部を設ける必要がない。よって、ケースに設ける固定部を小さくすることができるため、インバータ装置の更なる小型化が容易となる。また、バスバーモジュールと制御基板とが一体的に固定されるため、バスバーモジュールと制御基板との相対位置の精度を高くすることが容易となる。 According to this characteristic configuration, since the control board is fixed on the bus bar module, it is not necessary to provide a fixing portion for fixing the control board in the inverter case. Therefore, since the fixing part provided in the case can be reduced, further downsizing of the inverter device is facilitated. Further, since the bus bar module and the control board are integrally fixed, it becomes easy to increase the accuracy of the relative position between the bus bar module and the control board.
　ここで、前記バスバーモジュールは、複数のバスバーと、当該複数のバスバーを一体保持する保持部材と、を備え、前記モジュール固定部及び前記基板固定部が、前記素子配置面に直交する方向に見て前記保持部材における前記バスバーが配置されたバスバー配置領域とは異なる領域に設けられていると好適である。 Here, the bus bar module includes a plurality of bus bars and a holding member that integrally holds the plurality of bus bars, and the module fixing portion and the substrate fixing portion are viewed in a direction orthogonal to the element arrangement surface. It is preferable that the holding member is provided in an area different from the bus bar arrangement area where the bus bar is arranged.
　この構成によれば、モジュール固定部及び基板固定部を前記素子配置面に沿って見てバスバーと重複する位置に設けることができる。従って、モジュール固定部及び基板固定部が前記素子配置面に直交する方向に大きく突出することを抑制でき、バスバーモジュールの小型化を図ることが容易となる。 According to this configuration, the module fixing portion and the substrate fixing portion can be provided at a position overlapping the bus bar when viewed along the element arrangement surface. Therefore, it is possible to suppress the module fixing portion and the substrate fixing portion from greatly protruding in a direction orthogonal to the element arrangement surface, and it is easy to reduce the size of the bus bar module.
　また、前記バスバーモジュールは、複数のバスバーと、当該複数のバスバーを一体保持する保持部材と、を備え、前記保持部材は、前記複数のバスバーを内部に保持する絶縁材料の成形体であり、前記モジュール固定部及び前記基板固定部が一体的に成形されていると好適である。 The bus bar module includes a plurality of bus bars and a holding member that integrally holds the plurality of bus bars, and the holding member is a molded body of an insulating material that holds the plurality of bus bars therein, It is preferable that the module fixing portion and the substrate fixing portion are integrally formed.
　この構成によれば、モジュール固定部と基板固定部とを、保持部材を構成する絶縁材料の成形体によって一体的に形成することができ、製造コストを抑えることができる。また、モジュール固定部と基板固定部とが保持部材に一体的に成形されることから、モジュール固定部と基板固定部との相対位置の精度を高くすることが容易となる。よって、バスバーモジュールと制御基板との相対位置の精度を高くすることが容易となる。 According to this configuration, the module fixing portion and the substrate fixing portion can be integrally formed by the molded body of the insulating material constituting the holding member, and the manufacturing cost can be suppressed. Further, since the module fixing portion and the substrate fixing portion are integrally formed on the holding member, it is easy to increase the accuracy of the relative position between the module fixing portion and the substrate fixing portion. Therefore, it becomes easy to increase the accuracy of the relative position between the bus bar module and the control board.
　また、前記制御基板に前記バスバーモジュールのバスバーを流れる電流を検出するコアレス電流センサが配置されていると好適である。 Further, it is preferable that a coreless current sensor for detecting a current flowing through the bus bar of the bus bar module is disposed on the control board.
　上記のとおり、本発明の構成によれば、バスバーモジュールと制御基板との相対位置の精度を高くすることができるため、制御基板に配置されたコアレス電流センサと検出対象となるバスバーとの相対位置の精度も高くでき、高精度に電流を計測することが可能となる。 As described above, according to the configuration of the present invention, since the accuracy of the relative position between the bus bar module and the control board can be increased, the relative position between the coreless current sensor arranged on the control board and the bus bar to be detected. Therefore, the current can be measured with high accuracy.
　また、前記バスバーモジュール内の正極及び負極のバスバーに電気的に接続されたＰＮ端子が、前記バスバーモジュールから前記制御基板側へ向けて延びるように設けられ、前記制御基板に電圧センサが配置され、前記制御基板が前記基板固定部に固定された状態で、前記電圧センサと前記ＰＮ端子とが電気的に接続されると好適である。 Further, a PN terminal electrically connected to the positive and negative bus bars in the bus bar module is provided so as to extend from the bus bar module toward the control board, and a voltage sensor is disposed on the control board. It is preferable that the voltage sensor and the PN terminal are electrically connected in a state where the control board is fixed to the board fixing portion.
　上記のとおり、本発明の構成によれば、バスバーモジュールと制御基板との相対位置の精度を高くすることができるため、正極及び負極のバスバーに電気的に接続されたＰＮ端子を、バスバーモジュールから制御基板側へ向けて延びるように設け、制御基板に電圧センサを配置するとともにＰＮ端子との接続部を設けておくだけで、正極及び負極のバスバーと電圧センサとを容易に電気的に接続できる。よって、ＰＮ端子と電圧センサとを接続するための接続配線等を別途設ける必要がなく、配線の手間等を抑制して製造コストを抑えることが可能となる。 As described above, according to the configuration of the present invention, since the accuracy of the relative position between the bus bar module and the control board can be increased, the PN terminal electrically connected to the positive and negative bus bars is connected to the bus bar module. By providing a voltage sensor on the control board and providing a connection part with the PN terminal, the positive and negative bus bars can be easily electrically connected to the voltage sensor. . Therefore, it is not necessary to separately provide a connection wiring for connecting the PN terminal and the voltage sensor, and it is possible to reduce the manufacturing cost by suppressing the labor of the wiring.
　また、前記バスバーモジュールを挟んで配置される前記スイッチング素子と前記制御基板とを電気的に接続するフレキシブルプリント基板を備え、前記バスバーモジュールは、前記フレキシブルプリント基板の延在方向の一部において、前記フレキシブルプリント基板の周囲を囲む貫通孔を備えていると好適である。ここで、「フレキシブルプリント基板」とは、可撓性を有するプリント基板であり、本願においては、単に配線として機能するフレキシブルケーブルをも含む概念として用いている。 In addition, a flexible printed circuit board that electrically connects the switching element and the control board arranged with the bus bar module interposed therebetween, the bus bar module includes a part of the flexible printed circuit board in the extending direction, It is preferable that a through hole surrounding the periphery of the flexible printed board is provided. Here, the “flexible printed circuit board” is a printed circuit board having flexibility, and is used in the present application as a concept including a flexible cable that simply functions as wiring.
　この特徴構成によれば、前記貫通孔の壁面によってバスバーモジュールと交差する方向へのフレキシブルプリント基板の移動を規制することができる。よって、フレキシブルプリント基板が、振動などによりインバータケースの壁面やその他の部材と擦れて損傷することを抑制できる。 According to this characteristic configuration, the movement of the flexible printed circuit board in the direction intersecting the bus bar module can be regulated by the wall surface of the through hole. Therefore, it can suppress that a flexible printed circuit board is rubbed and damaged with the wall surface and other member of an inverter case by a vibration.
車両に搭載される車両用駆動装置及びインバータ装置の斜視図である。1 is a perspective view of a vehicle drive device and an inverter device mounted on a vehicle. インバータ回路の構成を示す模式図である。It is a schematic diagram which shows the structure of an inverter circuit. インバータ装置の分解斜視図である。It is a disassembled perspective view of an inverter apparatus. インバータモジュールの分解斜視図である。It is a disassembled perspective view of an inverter module. インバータ装置を冷却面に直交する方向から見た平面図である。It is the top view which looked at the inverter apparatus from the direction orthogonal to a cooling surface. インバータ装置の断面図である。It is sectional drawing of an inverter apparatus. インバータ装置を車両に搭載した状態を示す模式図である。It is a schematic diagram which shows the state which mounted the inverter apparatus in the vehicle. インバータ装置を冷却面に直交する方向から見た平面図である。It is the top view which looked at the inverter apparatus from the direction orthogonal to a cooling surface.
　本発明に係るインバータ装置の実施形態について、図面を参照して説明する。本実施形態では、ハイブリッド車両Ｖの車輪の駆動力源として機能する回転電機３を制御するシステムにおけるインバータ装置１を例として説明する。ハイブリッド車両Ｖ（以下では、「車両Ｖ」と呼ぶ。）は、図７に示すように、内燃機関６１と、回転電機３を有する車両用駆動装置６２と、インバータ装置１と、バッテリ２と、を備えている。 Embodiments of an inverter device according to the present invention will be described with reference to the drawings. In this embodiment, an inverter device 1 in a system that controls a rotating electrical machine 3 that functions as a driving force source for wheels of a hybrid vehicle V will be described as an example. As shown in FIG. 7, the hybrid vehicle V (hereinafter referred to as “vehicle V”) includes an internal combustion engine 61, a vehicle drive device 62 having a rotating electrical machine 3, an inverter device 1, a battery 2, It has.
　インバータ装置１はインバータ回路７（図２参照）を備え、当該インバータ装置１から見て外部機器となる回転電機３を制御する。なお、本例では、回転電機３は、三相交流で駆動される交流電動機とされている。この回転電機３は、電力の供給を受けて動力を発生するモータ（電動機）としての機能と、動力の供給を受けて電力を発生するジェネレータ（発電機）としての機能との双方を果たすことが可能とされている。本実施形態では、図７に示すように、車両用駆動装置６２は、内燃機関６１を収容する内燃機関ケース６３と、回転電機３を収容する回転電機ケース６４とを備えている。 The inverter device 1 includes an inverter circuit 7 (see FIG. 2), and controls the rotating electrical machine 3 that is an external device when viewed from the inverter device 1. In this example, the rotating electrical machine 3 is an AC motor driven by a three-phase AC. The rotating electrical machine 3 can perform both a function as a motor (electric motor) that generates power upon receiving power supply and a function as a generator (generator) that generates power upon receiving power supply. It is possible. In the present embodiment, as shown in FIG. 7, the vehicle drive device 62 includes an internal combustion engine case 63 that houses the internal combustion engine 61 and a rotating electrical machine case 64 that houses the rotating electrical machine 3.
　図１に示すように、インバータ装置１は、回転電機ケース６４に一体的に固定されている。本例では、インバータ装置１は、インバータモジュール６を含むインバータの構成部品を収容するインバータケース５（以下、「ケース５」と呼ぶ。）を備えている。本例では、当該ケース５は回転電機ケース６４とは別体として形成されるとともに、回転電機ケース６４に対して一体的に固定可能に構成されている。 As shown in FIG. 1, the inverter device 1 is integrally fixed to a rotating electrical machine case 64. In this example, the inverter device 1 includes an inverter case 5 (hereinafter referred to as “case 5”) that accommodates the components of the inverter including the inverter module 6. In this example, the case 5 is formed as a separate body from the rotating electrical machine case 64 and is configured to be integrally fixed to the rotating electrical machine case 64.
　図７に示すように、インバータ装置１は、車両Ｖの駆動力源としての回転電機３及びそのエネルギ源となる直流電源としてのバッテリ２に接続されている。本例では、さらに、インバータ装置１は、車両Ｖに備えられた電装部品１０１及びラジエータ１０２に接続されている。 As shown in FIG. 7, the inverter device 1 is connected to a rotating electrical machine 3 as a driving force source of the vehicle V and a battery 2 as a DC power source as an energy source thereof. In this example, the inverter device 1 is further connected to an electrical component 101 and a radiator 102 provided in the vehicle V.
１．インバータ回路の構成
　まず、インバータ回路７の構成について説明する。本実施形態に係るインバータ回路７は、複数（本例では６つ）のスイッチング素子１４を用いて構成されている。スイッチング素子１４は、直流電力と交流電力との間の電力変換を行うための電子素子であり、インバータ回路７及びインバータ装置１の中核をなしている。図２に示すように、インバータ回路７は、ブリッジ回路により構成されており、バッテリ２の正極Ｐ側とバッテリ２の負極Ｎ側（例えばグランド側）との間に２つのスイッチング素子１４が直列に接続され、この直列回路が３回線並列に接続されている。すなわち、インバータ回路７は、正極Ｐ側に接続される上段アームを構成するスイッチング素子１４と負極Ｎ側に接続される下段アームを構成するスイッチング素子１４とを有するレッグを３つ有する３レッグ構成とされている。各レッグは、回転電機３のコイル３ｂ（ステータコイル）の三相（Ｕ相、Ｖ相、Ｗ相）のそれぞれに対応している。 1. Configuration of Inverter Circuit First, the configuration of the inverter circuit 7 will be described. The inverter circuit 7 according to the present embodiment is configured by using a plurality (six in this example) of switching elements 14. The switching element 14 is an electronic element for performing power conversion between DC power and AC power, and forms the core of the inverter circuit 7 and the inverter device 1. As shown in FIG. 2, the inverter circuit 7 is configured by a bridge circuit, and two switching elements 14 are connected in series between the positive electrode P side of the battery 2 and the negative electrode N side (for example, the ground side) of the battery 2. These series circuits are connected in parallel in three lines. That is, the inverter circuit 7 has a three-leg configuration including three legs each having a switching element 14 constituting an upper arm connected to the positive electrode P side and a switching element 14 constituting a lower arm connected to the negative electrode N side. Has been. Each leg corresponds to each of the three phases (U phase, V phase, W phase) of the coil 3 b (stator coil) of the rotating electrical machine 3.
　図２において、符号１４ａはＵ相用上段側スイッチング素子であり、符号１４ｂはＶ相用上段側スイッチング素子であり、符号１４ｃはＷ相用上段側スイッチング素子である。また、符号１４ｄはＵ相用下段側スイッチング素子であり、符号１４ｅはＶ相用下段側スイッチング素子であり、符号１４ｆはＷ相用下段側スイッチング素子である。ここで、「上段側」は正極Ｐ側のアームであることを表し、「下段側」は負極Ｎ側のアームであることを表す。 In FIG. 2, reference numeral 14a is a U-phase upper switching element, reference numeral 14b is a V-phase upper switching element, and reference numeral 14c is a W-phase upper switching element. Reference numeral 14d is a U-phase lower stage switching element, reference numeral 14e is a V-phase lower switching element, and reference numeral 14f is a W-phase lower switching element. Here, “upper stage side” represents an arm on the positive electrode P side, and “lower stage side” represents an arm on the negative electrode N side.
　各相の上段側スイッチング素子１４ａ，１４ｂ，１４ｃのコレクタは第四バスバー２３ｄを介して正極Ｐ側に接続され、エミッタはバスバー２３ａ，２３ｂ，２３ｃを介して各相の下段側スイッチング素子１４ｄ，１４ｅ，１４ｆのコレクタに接続されている。また、各相の下段側スイッチング素子１４ｄ，１４ｅ，１４ｆのエミッタは第五バスバー２３ｅを介して負極Ｎ側に接続されている。各スイッチング素子１４のエミッタ－コレクタ間には、ダイオード素子１５が並列接続されている。ダイオード素子１５は、アノードがスイッチング素子１４のエミッタに接続され、カソードがスイッチング素子１４のコレクタに接続されている。ダイオード素子１５はＦＷＤ（Free Wheel Diode）として用いられている。 The collectors of the upper switching elements 14a, 14b, 14c of each phase are connected to the positive electrode P side via the fourth bus bar 23d, and the emitters of the lower switching elements 14d, 14e of each phase via the bus bars 23a, 23b, 23c. , 14f. The emitters of the lower switching elements 14d, 14e, and 14f of each phase are connected to the negative electrode N side via the fifth bus bar 23e. A diode element 15 is connected in parallel between the emitter and collector of each switching element 14. The diode element 15 has an anode connected to the emitter of the switching element 14 and a cathode connected to the collector of the switching element 14. The diode element 15 is used as FWD (Free Wheel Diode).
　対となるスイッチング素子（１４ａ，１４ｄ）、（１４ｂ，１４ｅ）、（１４ｃ，１４ｆ）と、それぞれ対応するバスバー２３ａ，２３ｂ，２３ｃとを含んで構成される各アームは、回転電機接続端子２５ａ，２５ｂ，２５ｃを介して回転電機３の各相のコイル３ｂに接続されている。そして、各スイッチング素子１４のゲートは、フレキシブルプリント基板１９を介して、制御基板４１に設けられた駆動回路（図示省略）に接続されており、それぞれ個別にスイッチング制御される。 Each arm including the pair of switching elements (14a, 14d), (14b, 14e), (14c, 14f) and the corresponding bus bars 23a, 23b, 23c is connected to the rotating electrical machine connection terminals 25a, It is connected to the coil 3b of each phase of the rotating electrical machine 3 through 25b and 25c. And the gate of each switching element 14 is connected to the drive circuit (illustration omitted) provided in the control board 41 via the flexible printed circuit board 19, and each switching control is carried out.
　このようなインバータ回路７を含むインバータ装置１は、回転電機３に要求される要求回転速度や要求トルクに基づいて各スイッチング素子１４を制御（例えば、パルス幅変調制御等）することで、バッテリ２からの直流電力を三相交流電力に変換して回転電機３に供給する。これにより、回転電機３が要求回転速度及び要求トルクに応じて力行する。一方、回転電機３が発電機として機能し、回転電機３側から電力の供給を受ける場合には、インバータ装置１は、各スイッチング素子１４を制御することで、発電された三相交流電力を直流電力に変換してバッテリ２に充電させる。 The inverter device 1 including such an inverter circuit 7 controls each switching element 14 based on a required rotational speed and a required torque required for the rotating electrical machine 3 (for example, pulse width modulation control), whereby the battery 2 Is converted into three-phase AC power and supplied to the rotating electrical machine 3. As a result, the rotating electrical machine 3 performs powering according to the required rotational speed and the required torque. On the other hand, when the rotating electrical machine 3 functions as a generator and receives power supply from the rotating electrical machine 3 side, the inverter device 1 controls each switching element 14 to convert the generated three-phase AC power into direct current. The battery 2 is charged by converting into electric power.
２．インバータ装置の全体構成
　次に、インバータ装置１の全体構成について、図３を参照して説明する。インバータ装置１は、インバータモジュール６と直流電力の平滑用のコンデンサ３１とスイッチング素子１４などの動作を制御するための制御基板４１とを備えている。これらは直方体状に形成されたケース５内に収容されている。インバータモジュール６は、インバータ回路７が実装されたモジュールであり、図２に示すように、バッテリ２と回転電機３との間の電気回路に介挿されている。バッテリ２とインバータモジュール６との間には、コンデンサ３１がさらに介挿されている。 2. Next, the overall configuration of the inverter device 1 will be described with reference to FIG. The inverter device 1 includes an inverter module 6, a DC power smoothing capacitor 31, and a control board 41 for controlling operations of the switching element 14 and the like. These are accommodated in a case 5 formed in a rectangular parallelepiped shape. The inverter module 6 is a module on which an inverter circuit 7 is mounted, and is interposed in an electric circuit between the battery 2 and the rotating electrical machine 3 as shown in FIG. A capacitor 31 is further interposed between the battery 2 and the inverter module 6.
　図４に示すように、インバータ装置１の構成部品であるインバータモジュール６は、複数のスイッチング素子１４と、これら複数のスイッチング素子１４が載置される素子載置面１１ａを有するベースプレート１１と、複数のバスバー２３を有するバスバーモジュール２０とを主要な構成部品として備えている。ここで、スイッチング素子１４は、直流電力と交流電力との間の電力変換を行うための部材であり、バスバー２３は、複数のスイッチング素子１４を電気的に接続してインバータ回路７を形成するための部材である。なお、本実施形態における素子載置面１１ａが、本発明における「素子配置面」に相当する。 As shown in FIG. 4, the inverter module 6 that is a component of the inverter device 1 includes a plurality of switching elements 14, a base plate 11 having an element mounting surface 11 a on which the plurality of switching elements 14 are mounted, and a plurality of switching elements 14. The bus bar module 20 having the bus bar 23 is provided as a main component. Here, the switching element 14 is a member for performing power conversion between DC power and AC power, and the bus bar 23 is for electrically connecting the plurality of switching elements 14 to form the inverter circuit 7. It is a member. The element mounting surface 11a in the present embodiment corresponds to the “element arrangement surface” in the present invention.
２－１．インバータモジュール
２－１－１．ベースプレート
　図３に示すように、ベースプレート１１は、スイッチング素子１４を載置するためのベースとなる板状の部材である。ベースプレート１１は、銅やアルミニウム等の金属材料で構成されている。図４等に示すように、ベースプレート１１の素子載置面１１ａには、絶縁部材１２及び素子基板１３が互いに平行な状態で積層されている。この積層方向は素子載置面１１ａに直交する方向Ｚ（以下、単に「直交方向Ｚ」と呼ぶ。また、この直交方向Ｚにおいて、素子載置面１１ａから制御基板４１に向かう方向を直交第一方向Ｚ１と呼び、その反対方向を直交第二方向Ｚ２と呼ぶ。）に一致している。 2-1. Inverter module 2-1-1. Base Plate As shown in FIG. 3, the base plate 11 is a plate-like member that serves as a base on which the switching element 14 is placed. The base plate 11 is made of a metal material such as copper or aluminum. As shown in FIG. 4 and the like, the insulating member 12 and the element substrate 13 are stacked on the element mounting surface 11a of the base plate 11 in a state of being parallel to each other. This stacking direction is a direction Z (hereinafter simply referred to as “orthogonal direction Z”) orthogonal to the element mounting surface 11a. In this orthogonal direction Z, the direction from the element mounting surface 11a toward the control substrate 41 is orthogonal The direction is called Z1 and the opposite direction is called orthogonal second direction Z2.)
　絶縁部材１２は、電気的絶縁性及び熱伝導性の双方を備えるシート状部材で構成され、本例では樹脂製のシート部材とされている。素子基板１３は、導電性の材料（例えば、銅やアルミニウム等の金属材料）で構成され、絶縁部材１２を介して熱圧着によりベースプレート１１に接着固定されている。本例では、素子基板１３は、ベースプレート１１と別部材として異なる材料で構成されている。この素子基板１３は、ヒートスプレッダとしても機能する。 The insulating member 12 is composed of a sheet-like member having both electrical insulation and thermal conductivity, and is a resin sheet member in this example. The element substrate 13 is made of a conductive material (for example, a metal material such as copper or aluminum), and is bonded and fixed to the base plate 11 via the insulating member 12 by thermocompression bonding. In this example, the element substrate 13 is made of a material different from the base plate 11 as a separate member. This element substrate 13 also functions as a heat spreader.
　図４に示すように、本実施形態ではベースプレート１１上に１つの絶縁部材１２が配置され、絶縁部材１２上に複数（本例では６つ）の素子基板１３が配置されている。本例では、これら複数の素子基板１３は、一方向（後述する長辺方向Ｙ）に沿って一列に６つ並ぶように配置されている。この際、複数の素子基板１３は、各素子基板１３の短辺方向が、複数の素子基板１３の配列方向（長辺方向Ｙ）と平行になる向きで、すなわち、複数の素子基板１３の長辺が互いに平行になる向きで配列されている。 As shown in FIG. 4, in this embodiment, one insulating member 12 is disposed on the base plate 11, and a plurality (six in this example) of element substrates 13 are disposed on the insulating member 12. In this example, the plurality of element substrates 13 are arranged in a line along one direction (long side direction Y described later). At this time, the plurality of element substrates 13 are arranged so that the short side direction of each element substrate 13 is parallel to the arrangement direction (long side direction Y) of the plurality of element substrates 13, that is, the length of the plurality of element substrates 13. The sides are arranged in parallel directions.
　また本実施形態では、各素子基板１３の上面には、スイッチング素子１４及びダイオード素子１５がそれぞれ１つずつ載置されている。これにより、本例では、ベースプレート１１の素子載置面１１ａに、絶縁部材１２及び素子基板１３を介して６つのスイッチング素子１４と６つのダイオード素子１５とが設けられる。そして、これらのスイッチング素子１４及びダイオード素子１５を含んでインバータ回路７が構成される。スイッチング素子１４として、本実施形態ではＩＧＢＴ（insulated gate bipolar transistor）を用いている。なお、スイッチング素子１４として、ＭＯＳＦＥＴ（metal oxide semiconductor field effect transistor）等を用いることも可能である。また、本例では、図４等に示すように、同一の素子基板１３に載置されたスイッチング素子１４とダイオード素子１５とは、一方向（後述する短辺方向Ｘ）に沿って並ぶように互いに隣接して配置されている。 In this embodiment, one switching element 14 and one diode element 15 are mounted on the upper surface of each element substrate 13. Thereby, in this example, the six switching elements 14 and the six diode elements 15 are provided on the element mounting surface 11 a of the base plate 11 via the insulating member 12 and the element substrate 13. The inverter circuit 7 includes the switching element 14 and the diode element 15. In this embodiment, an IGBT (insulated gate gate bipolar transistor) is used as the switching element 14. As the switching element 14, a MOSFET (metal-oxide-semiconductor-field-effect-transistor) or the like can be used. Further, in this example, as shown in FIG. 4 and the like, the switching element 14 and the diode element 15 placed on the same element substrate 13 are aligned along one direction (a short side direction X described later). It is arranged adjacent to each other.
　図５に示すように、スイッチング素子１４は、ケース５内において、素子載置面１１ａに沿って当該素子載置面１１ａの所定の長方形状領域Ｒ内に配置されている。長方形状領域Ｒは、回転電機接続端子２５とコンデンサ接続端子３３との間に設けられている。図５中では、長方形状領域Ｒの長辺方向をＹ、短辺方向をＸで表している。以下では、長方形状領域Ｒの各辺の方向を「短辺方向Ｘ」、「長辺方向Ｙ」と呼ぶ。また、短辺方向Ｘにおいて図５における右側を「短辺第一方向Ｘ１」と呼び、左側を「短辺第二方向Ｘ２」と呼ぶ。また、長辺方向Ｙにおいて図５における上側を「長辺第一方向Ｙ１」と呼び、下側を「長辺第二方向Ｙ２」と呼ぶ。本例では、６つのスイッチング素子１４が、長辺方向Ｙに沿って６つ並ぶように配置されている。 As shown in FIG. 5, in the case 5, the switching element 14 is disposed in a predetermined rectangular region R of the element mounting surface 11a along the element mounting surface 11a. The rectangular region R is provided between the rotating electrical machine connection terminal 25 and the capacitor connection terminal 33. In FIG. 5, the long side direction of the rectangular region R is represented by Y, and the short side direction is represented by X. Hereinafter, the direction of each side of the rectangular region R is referred to as “short side direction X” and “long side direction Y”. Further, in the short side direction X, the right side in FIG. 5 is referred to as “short side first direction X1”, and the left side is referred to as “short side second direction X2”. Further, in the long side direction Y, the upper side in FIG. 5 is referred to as “long side first direction Y1”, and the lower side is referred to as “long side second direction Y2”. In this example, six switching elements 14 are arranged so as to be arranged along the long side direction Y.
　図４に示すように、スイッチング素子１４の上面（エミッタ電極）とダイオード素子１５の上面（アノード電極）とを電気的に接続する状態で、第一電極部材１７が配置されている。第一電極部材１７は、本例では一定幅の帯状部材（板状部材）を用いて屈曲成形されている。また、素子基板１３の上面に第二電極部材１８が載置されている。第二電極部材１８は、素子基板１３を介してスイッチング素子１４の下面（コレクタ電極）とダイオード素子１５の下面（カソード電極）とを電気的に接続する。第二電極部材１８は、本例ではブロック状部材とされている。第一電極部材１７及び第二電極部材１８の双方は、導電性の材料（例えば、銅やアルミニウム等の金属材料）で構成される。 As shown in FIG. 4, the first electrode member 17 is disposed in a state where the upper surface (emitter electrode) of the switching element 14 and the upper surface (anode electrode) of the diode element 15 are electrically connected. In this example, the first electrode member 17 is bent and formed using a band-shaped member (plate-shaped member) having a constant width. A second electrode member 18 is placed on the upper surface of the element substrate 13. The second electrode member 18 electrically connects the lower surface (collector electrode) of the switching element 14 and the lower surface (cathode electrode) of the diode element 15 via the element substrate 13. The second electrode member 18 is a block-shaped member in this example. Both the first electrode member 17 and the second electrode member 18 are made of a conductive material (for example, a metal material such as copper or aluminum).
　図５に示すように、本実施形態では、対となるスイッチング素子（１４ａ，１４ｄ）、（１４ｂ，１４ｅ）、（１４ｃ，１４ｆ）と、それぞれ対応するダイオード素子１５、第一電極部材１７、第二電極部材１８、及びバスバー２３ａ，２３ｂ，２３ｃ（以下、単に「ダイオード素子１５等」と略称する場合がある）とにより、インバータ回路７の各レッグが構成される。このうち、スイッチング素子１４ａ，１４ｂ，１４ｃと、それぞれ対応するダイオード素子１５等とにより、インバータ回路７の各上段アームが構成される。また、スイッチング素子１４ｄ，１４ｅ，１４ｆと、それぞれ対応するダイオード素子１５等とにより、インバータ回路７の各下段アームが構成される。 As shown in FIG. 5, in this embodiment, the switching elements (14a, 14d), (14b, 14e), (14c, 14f) to be paired with the corresponding diode elements 15, the first electrode member 17, the first Each leg of the inverter circuit 7 is configured by the two-electrode member 18 and the bus bars 23a, 23b, and 23c (hereinafter sometimes simply referred to as “diode element 15 etc.”). Among these, each upper stage arm of the inverter circuit 7 is comprised by the switching elements 14a, 14b, and 14c and the corresponding diode elements 15 and the like. Further, each lower arm of the inverter circuit 7 is configured by the switching elements 14d, 14e, and 14f and the corresponding diode elements 15 and the like.
　図６に示すように、ベースプレート１１の素子載置面１１ａとは反対側には、放熱フィン１１ｂが設けられている。本例では、放熱フィン１１ｂはベースプレート１１と一体的に形成されている。この放熱フィン１１ｂは、素子基板１３及び絶縁部材１２を介してベースプレート１１に伝達されるスイッチング素子１４の熱（スイッチング動作に伴って発生する熱）をその表面から放熱させる。図示は省略するが、本例では、放熱フィン１１ｂは、ベースプレート１１の素子載置面１１ａとは反対側の面から当該面に直交する方向Ｚ（以下、単に「直交方向Ｚ」と呼ぶ）に向って立設するフィンからなる。具体的には、放熱フィン１１ｂは、直交方向Ｚに向かって、複数の棒状部材が立設して構成されるピンフィンである。ただし、放熱フィン１１ｂは、直交方向Ｚに突出するとともに、一方向（後述する長辺方向Ｙ）に沿って延びる平板状に形成してもよい。 As shown in FIG. 6, on the opposite side of the base plate 11 from the element mounting surface 11a, heat radiating fins 11b are provided. In this example, the heat radiating fins 11 b are formed integrally with the base plate 11. The heat radiating fins 11 b radiate the heat of the switching element 14 (heat generated with the switching operation) transmitted to the base plate 11 through the element substrate 13 and the insulating member 12 from the surface thereof. Although illustration is omitted, in this example, the radiating fins 11b are arranged in a direction Z (hereinafter simply referred to as "orthogonal direction Z") perpendicular to the surface from the surface opposite to the element mounting surface 11a of the base plate 11. It consists of fins standing upright. Specifically, the heat radiating fins 11 b are pin fins configured with a plurality of rod-shaped members standing in the orthogonal direction Z. However, the heat radiation fin 11b may be formed in a flat plate shape that protrudes in the orthogonal direction Z and extends along one direction (long-side direction Y described later).
　本実施形態では、ベースプレート１１は、ケース５内に設けられた冷却路構成部材１１０に接するように配置される。冷却路構成部材１１０は、ベースプレート１１の素子載置面１１ａに平行な面に沿って延在する部材であり、ケース５と一体的に形成されている。ただし、冷却路構成部材１１０を、ケース５と別体として形成し、ケース５の内壁に固定する構造としても構わない。そして、冷却路構成部材１１０は、ベースプレート１１が接する側の面に凹部１１１を備えている。凹部１１１は、冷却路構成部材１１０にベースプレート１１が取り付けられた状態で、冷却水の流通経路となる。そのため、凹部１１１は、ベースプレート１１の放熱フィン１１ｂが収容可能な空間を有するように形成されている。凹部１１１には、ケース５外からの冷却水流通管路１１２ａ、１１２ｂが接続されている。そして、これらの冷却水流通管路１１２ａ、１１２ｂの一方から凹部１１１内に冷却水が導入されるとともに、他方からケース５外に冷却水が排出される。このような構成により、ベースプレート１１を冷却水により冷却できる。 In the present embodiment, the base plate 11 is disposed so as to be in contact with the cooling path constituting member 110 provided in the case 5. The cooling path constituting member 110 is a member that extends along a plane parallel to the element mounting surface 11 a of the base plate 11, and is formed integrally with the case 5. However, the cooling path constituting member 110 may be formed separately from the case 5 and fixed to the inner wall of the case 5. The cooling path constituting member 110 includes a recess 111 on the surface on the side where the base plate 11 contacts. The recess 111 serves as a cooling water flow path in a state where the base plate 11 is attached to the cooling path constituting member 110. Therefore, the recess 111 is formed so as to have a space that can accommodate the heat dissipating fins 11 b of the base plate 11. Cooling water circulation pipes 112 a and 112 b from the outside of the case 5 are connected to the recess 111. Then, the cooling water is introduced into the recess 111 from one of these cooling water circulation pipes 112 a and 112 b, and the cooling water is discharged out of the case 5 from the other. With such a configuration, the base plate 11 can be cooled by the cooling water.
２－１－２．バスバーモジュール
　図４に示すように、インバータ装置１の構成部品であるバスバーモジュール２０は、複数のバスバー２３と、当該複数のバスバー２３を一体保持する接続支持体２１と、を主要な構成部品として備え、さらにスイッチング素子１４と回転電機３とを電気的に接続する回転電機接続端子２５、及び少なくともコンデンサ３１とスイッチング素子１４とを電気的に接続するコンデンサ接続端子３３を備えている。回転電機接続端子２５及びコンデンサ接続端子３３は、バスバー２３と一体的に形成されており、バスバーモジュール２０の一部を構成している。
　本実施形態における接続支持体２１は、本発明における「保持部材」に相当する。 2-1-2. Bus Bar Module As shown in FIG. 4, the bus bar module 20 that is a component of the inverter device 1 includes a plurality of bus bars 23 and a connection support 21 that integrally holds the plurality of bus bars 23 as main components. Furthermore, a rotating electrical machine connection terminal 25 that electrically connects the switching element 14 and the rotating electrical machine 3 and a capacitor connection terminal 33 that electrically connects at least the capacitor 31 and the switching element 14 are provided. The rotating electrical machine connection terminal 25 and the capacitor connection terminal 33 are formed integrally with the bus bar 23 and constitute a part of the bus bar module 20.
The connection support 21 in the present embodiment corresponds to a “holding member” in the present invention.
　図６に示すように、バスバーモジュール２０は、複数のスイッチング素子１４に対してベースプレート１１とは反対側に配置されている。すなわち、これらの構成部品は、直交方向Ｚに沿って回転電機３側から、バスバーモジュール２０、スイッチング素子１４、ベースプレート１１の順に配置される。 As shown in FIG. 6, the bus bar module 20 is disposed on the opposite side of the base plate 11 with respect to the plurality of switching elements 14. That is, these components are arranged in the order of the bus bar module 20, the switching element 14, and the base plate 11 from the rotating electrical machine 3 side along the orthogonal direction Z.
　図４～図６に示す接続支持体２１は、複数のバスバー２３を一体的に支持する構造体である。本実施形態では、接続支持体２１は、複数のバスバー２３を内部に保持する絶縁材料の成形体で構成されている。そして、接続支持体２１は、ケース５に直接固定されている。ただし、この接続支持体２１は、ボルト等の締結部材によりベースプレート１１の素子載置面１１ａ側に固定され、当該ベースプレート１１がケース５に固定されることで、ケース５に対して間接的に固定されてもよい。 The connection support 21 shown in FIGS. 4 to 6 is a structure that integrally supports a plurality of bus bars 23. In the present embodiment, the connection support body 21 is formed of a molded body of an insulating material that holds a plurality of bus bars 23 inside. The connection support 21 is directly fixed to the case 5. However, the connection support 21 is fixed to the element mounting surface 11 a side of the base plate 11 by a fastening member such as a bolt, and is indirectly fixed to the case 5 by fixing the base plate 11 to the case 5. May be.
　本例では、接続支持体２１には、モジュール固定部２７が備えられており、モジュール固定部２７が、ボルト等の締結部材によりケース５に直接固定される。また、接続支持体２１には、基板固定部２６が備えられており、制御基板４１がボルト等の締結部材により、基板固定部２６に固定される。すなわち、制御基板４１は、接続支持体２１を介して、ベースプレート１１及びケース５に固定される。 In this example, the connection support 21 is provided with a module fixing portion 27, and the module fixing portion 27 is directly fixed to the case 5 by a fastening member such as a bolt. Further, the connection support 21 is provided with a substrate fixing portion 26, and the control substrate 41 is fixed to the substrate fixing portion 26 with a fastening member such as a bolt. That is, the control board 41 is fixed to the base plate 11 and the case 5 through the connection support 21.
　本実施形態では、バスバーモジュール２０は、第一バスバー２３ａ、第二バスバー２３ｂ、第三バスバー２３ｃ、第四バスバー２３ｄ、及び第五バスバー２３ｅの５つのバスバー２３を備えている。各バスバー２３は、導電性の材料（例えば、銅やアルミニウム等の金属材料）で構成され、本例では平板状部材を用いて所定形状に屈曲形成されている。 In this embodiment, the bus bar module 20 includes five bus bars 23 including a first bus bar 23a, a second bus bar 23b, a third bus bar 23c, a fourth bus bar 23d, and a fifth bus bar 23e. Each bus bar 23 is made of a conductive material (for example, a metal material such as copper or aluminum), and is bent into a predetermined shape using a flat plate member in this example.
　図２及び図５に示すように、第一バスバー２３ａ、第二バスバー２３ｂ、及び第三バスバー２３ｃは、それぞれ第一電極部材１７（図４参照）を介して上段アームのスイッチング素子１４及びダイオード素子１５と回転電機接続端子２５との間を電気的に接続する電気的接続部材である。また、第一バスバー２３ａ、第二バスバー２３ｂ、及び第三バスバー２３ｃは、第二電極部材１８（図４参照）を介して下段アームのスイッチング素子１４及びダイオード素子１５と回転電機接続端子２５との間を電気的に接続する。バスバー２３ａ，２３ｂ，２３ｃは、全体として短辺方向Ｘに沿って延在している。第四バスバー２３ｄは、第二電極部材１８（図４参照）を介して上段アームのスイッチング素子１４及びダイオード素子１５と正極Ｐ側の直流端子３４である正極側直流端子３４ａとの間を電気的に接続する電気的接続部材である。第五バスバー２３ｅは、第一電極部材１７（図４参照）を介して下段アームのスイッチング素子１４及びダイオード素子１５と負極Ｎ側の直流端子３４である負極側直流端子３４ｂとの間を電気的に接続する電気的接続部材である。バスバー２３ｄ，２３ｅは、全体として長辺方向Ｙに沿って延在している。 2 and 5, the first bus bar 23a, the second bus bar 23b, and the third bus bar 23c are respectively connected to the switching element 14 and the diode element of the upper arm via the first electrode member 17 (see FIG. 4). 15 is an electrical connection member that electrically connects 15 and the rotating electrical machine connection terminal 25. The first bus bar 23a, the second bus bar 23b, and the third bus bar 23c are connected to the lower arm switching element 14 and the diode element 15 and the rotating electrical machine connection terminal 25 via the second electrode member 18 (see FIG. 4). Electrical connection between them. The bus bars 23a, 23b, and 23c extend along the short side direction X as a whole. The fourth bus bar 23d is electrically connected between the switching element 14 and the diode element 15 of the upper arm via the second electrode member 18 (see FIG. 4) and the positive DC terminal 34a which is the DC terminal 34 on the positive P side. It is an electrical connection member connected to. The fifth bus bar 23e is electrically connected between the switching element 14 and the diode element 15 of the lower arm via the first electrode member 17 (see FIG. 4) and the negative DC terminal 34b which is the negative DC terminal 34. It is an electrical connection member connected to. The bus bars 23d and 23e extend along the long side direction Y as a whole.
　本例では、各バスバー２３と第一電極部材１７及び第二電極部材１８との間の電気的な接続は、各バスバー２３と一体的に形成され、接続支持体２１に支持された複数の接合部２４が、第一電極部材１７の上面及び第二電極部材１８の上面に対して押圧された状態で接合されることによって実現される。本例では、各バスバー２３と第一電極部材１７及び第二電極部材１８とは、ＹＡＧレーザ、ＣＯ２レーザ、半導体レーザ等を利用したレーザ溶接により接合される。 In this example, the electrical connection between each bus bar 23 and the first electrode member 17 and the second electrode member 18 is formed integrally with each bus bar 23 and is a plurality of joints supported by the connection support 21. The portion 24 is realized by being bonded to the upper surface of the first electrode member 17 and the upper surface of the second electrode member 18 in a pressed state. In this example, each bus bar 23 and the first electrode member 17 and the second electrode member 18 are joined by laser welding using a YAG laser, a CO2 laser, a semiconductor laser, or the like.
　回転電機接続端子２５は、車両Ｖの駆動力源としての回転電機３との間で交流電力の入出力を行うための端子である。本実施形態では、このような回転電機接続端子２５として、三相用の回転電機接続端子２５ａ，２５ｂ，２５ｃを備えている。本例では、Ｕ相用回転電機接続端子２５ａは、第一バスバー２３ａの短辺第一方向Ｘ１側の端部において当該第一バスバー２３ａと一体的に形成されている。同様に、Ｖ相用回転電機接続端子２５ｂは第二バスバー２３ｂの短辺第一方向Ｘ１方向側の端部と一体的に形成され、Ｗ相用回転電機接続端子２５ｃは第三バスバー２３ｃの短辺第一方向Ｘ１方向側の端部と一体的に形成されている。これら３つの回転電機接続端子２５ａ，２５ｂ，２５ｃは、インバータ回路７を構成する３つのレッグの配列に応じて長辺方向Ｙに平行な方向に沿って順に配列されている。なお、本実施形態では、後述するように長辺方向Ｙは回転電機３の回転軸３ａに対して直交する方向に一致しており、従って３つの回転電機接続端子２５ａ，２５ｂ，２５ｃは、当該回転軸３ａに対して直交する方向に沿って順に配列されていることになる。 The rotating electrical machine connection terminal 25 is a terminal for inputting / outputting AC power to / from the rotating electrical machine 3 as a driving force source of the vehicle V. In the present embodiment, three-phase rotary electric machine connection terminals 25a, 25b, and 25c are provided as such rotary electric machine connection terminals 25. In this example, the U-phase rotating electrical machine connection terminal 25a is formed integrally with the first bus bar 23a at the end portion on the short side first direction X1 side of the first bus bar 23a. Similarly, the V-phase rotating electrical machine connection terminal 25b is formed integrally with the end portion of the second bus bar 23b on the short side first direction X1 side, and the W-phase rotating electrical machine connection terminal 25c is formed on the short side of the third bus bar 23c. It is formed integrally with the end portion on the side first direction X1 direction side. These three rotating electrical machine connection terminals 25 a, 25 b, 25 c are arranged in order along a direction parallel to the long side direction Y according to the arrangement of the three legs constituting the inverter circuit 7. In this embodiment, as will be described later, the long side direction Y coincides with the direction orthogonal to the rotating shaft 3a of the rotating electrical machine 3, and thus the three rotating electrical machine connection terminals 25a, 25b, 25c They are arranged in order along the direction orthogonal to the rotation axis 3a.
２－２．コンデンサ
　コンデンサ３１は、バッテリ２とインバータモジュール６との間に並列に設けられ、これらの間の直流電力を平滑する。図３に示すように、コンデンサ３１は、ケース部３１ａとコンデンサ素子３１ｂとにより構成されている。ケース部３１ａは、短辺方向Ｘの両側、長辺方向Ｙの両側、及び直交方向Ｚの一方側を覆うように形成されている。具体的には、直交方向Ｚから見て、長方形状となるバスタブ状に形成されている。ケース部３１ａには、バッテリ２との間で直流電力の入出力を行う電源端子と、スイッチング素子１４との間で直流電力の入出力を行う直流端子３５とがケース部３１ａに対して所定位置に配置されている。これらの部材は、ケース部３１ａの所定位置に配置された状態で、ケース部３１ａ内に樹脂が充填されることで、ケース部３１ａに固定されている。これらの電源端子と直流端子３５との間は、図２に示すように電気的に接続される。 2-2. Capacitor The capacitor 31 is provided in parallel between the battery 2 and the inverter module 6 and smoothes the DC power between them. As shown in FIG. 3, the capacitor 31 includes a case portion 31a and a capacitor element 31b. The case portion 31 a is formed so as to cover both sides in the short side direction X, both sides in the long side direction Y, and one side in the orthogonal direction Z. Specifically, when viewed from the orthogonal direction Z, it is formed in a rectangular bathtub shape. In the case portion 31a, a power supply terminal for inputting / outputting DC power to / from the battery 2 and a DC terminal 35 for inputting / outputting DC power to / from the switching element 14 are located at predetermined positions with respect to the case portion 31a. Is arranged. These members are fixed to the case portion 31a by being filled with resin in the case portion 31a in a state where the members are arranged at predetermined positions of the case portion 31a. These power supply terminals and the DC terminal 35 are electrically connected as shown in FIG.
　図６に示すように、コンデンサ３１は、ベースプレート１１を挟んで複数のスイッチング素子１４とは反対側に配置されている。すなわち、これらの構成部品は、直交方向Ｚに沿って回転電機３側から、スイッチング素子１４、ベースプレート１１、コンデンサ３１の順に配置される。 As shown in FIG. 6, the capacitor 31 is disposed on the opposite side of the plurality of switching elements 14 with the base plate 11 interposed therebetween. That is, these components are arranged in the order of the switching element 14, the base plate 11, and the capacitor 31 from the rotating electrical machine 3 side along the orthogonal direction Z.
２－３．制御基板
　制御基板４１は、主にスイッチング素子１４の動作を制御するための機能を有する。そのため、制御基板４１には、少なくともスイッチング素子１４を個別にスイッチング制御するための駆動回路（図示省略）が設けられている。また本実施形態では、制御基板４１には、バスバー２３ｄとバスバー２３ｅとの間の両極間の電圧を検出するための電圧検出回路も設けられている。その他、制御基板４１には、バスバー２３ａ，２３ｂ，２３ｃを流れる交流電流を検出するための電流検出回路や、スイッチング素子１４の温度を検出するための温度検出回路等も設けられている。 2-3. Control Board The control board 41 mainly has a function for controlling the operation of the switching element 14. Therefore, the control board 41 is provided with a drive circuit (not shown) for individually controlling switching of at least the switching elements 14. In the present embodiment, the control board 41 is also provided with a voltage detection circuit for detecting a voltage between both electrodes between the bus bar 23d and the bus bar 23e. In addition, the control board 41 is also provided with a current detection circuit for detecting an alternating current flowing through the bus bars 23a, 23b, 23c, a temperature detection circuit for detecting the temperature of the switching element 14, and the like.
　図６に示すように、制御基板４１は、バスバーモジュール２０を挟んで複数のスイッチング素子１４とは反対側に配置されている。すなわち、これらの構成部品は、素子載置面１１ａに直交する直交方向Ｚに沿って回転電機３側から、制御基板４１、バスバーモジュール２０、スイッチング素子１４の順に配置される。 As shown in FIG. 6, the control board 41 is disposed on the opposite side of the plurality of switching elements 14 with the bus bar module 20 interposed therebetween. That is, these components are arranged in the order of the control board 41, the bus bar module 20, and the switching element 14 from the rotating electrical machine 3 side along the orthogonal direction Z orthogonal to the element mounting surface 11a.
　また、図４に示すように、制御基板４１には、当該制御基板４１をバスバーモジュール２０上に固定するための被支持部８２が複数設けられている。被支持部８２は、直交方向Ｚに見て、バスバーモジュール２０の基板固定部２６に対応する位置に設けられている。本実施形態においては、被支持部８２として直交方向Ｚの貫通孔が複数（本例では９つ）設けられており、制御基板４１は、当該貫通孔を介して、固定部材（例えば、ボルト）によりバスバーモジュール２０に固定される。 Further, as shown in FIG. 4, the control board 41 is provided with a plurality of supported portions 82 for fixing the control board 41 on the bus bar module 20. The supported portion 82 is provided at a position corresponding to the board fixing portion 26 of the bus bar module 20 when viewed in the orthogonal direction Z. In the present embodiment, a plurality of (9 in this example) through-holes in the orthogonal direction Z are provided as the supported portion 82, and the control board 41 is fixed to a fixing member (for example, a bolt) via the through-holes. Is fixed to the bus bar module 20.
　これら被支持部８２の一部は、制御基板４１の短辺第一方向Ｘ１側において、長辺方向Ｙに沿って設けられている。具体的には、制御基板４１の短辺第一方向Ｘ１側に、４つの被支持部８２ａ～８２ｄが均等な間隔で設けられており、これら４つの被支持部８２の間に、後述するセンサやコネクタが配置されている。 Some of these supported portions 82 are provided along the long side direction Y on the short side first direction X1 side of the control substrate 41. Specifically, four supported portions 82a to 82d are provided at equal intervals on the short side first direction X1 side of the control board 41, and a sensor described later is provided between these four supported portions 82. And connectors are arranged.
３．バスバーモジュールと制御基板の配置関係
３－１．バスバーモジュールと制御基板との固定
　図３～５に示すように、バスバーモジュール２０は、当該バスバーモジュール２０に設けられたモジュール固定部２７を介してケース５に固定されている。本例では、モジュール固定部２７は、直交方向Ｚの貫通孔を備えた円筒状部である。当該貫通孔を介して支持部材（例えば、ボルト）によりケース５に固定される。本例では、モジュール固定部２７の直交第一方向Ｚ１側の面は、基板固定部２６の直交第一方向Ｚ１側の面に対して所定距離以上（ここではボルト頭部の直交方向Ｚの厚さ以上）直交第二方向Ｚ２側に位置するよう形成されている。このような構成により、本例では、固定部材としてボルトを用いた場合でも、ボルトの頭部が基板固定部２６の直交第一方向Ｚ１側の面より直交第一方向Ｚ１側に飛び出ないようになっている。 3. 3. Relationship between bus bar module and control board 3-1. Fixing the Bus Bar Module to the Control Board As shown in FIGS. 3 to 5, the bus bar module 20 is fixed to the case 5 via a module fixing portion 27 provided in the bus bar module 20. In this example, the module fixing part 27 is a cylindrical part having a through hole in the orthogonal direction Z. It is fixed to the case 5 by a support member (for example, a bolt) through the through hole. In this example, the surface of the module fixing portion 27 on the orthogonal first direction Z1 side is a predetermined distance or more than the surface of the substrate fixing portion 26 on the orthogonal first direction Z1 side (here, the thickness of the bolt head in the orthogonal direction Z). Or more) formed so as to be positioned on the orthogonal second direction Z2 side. With this configuration, in this example, even when a bolt is used as the fixing member, the head of the bolt does not protrude from the surface on the orthogonal first direction Z1 side of the board fixing portion 26 to the orthogonal first direction Z1 side. It has become.
　図５に示すように、本例では、モジュール固定部２７は、バスバーモジュール２０の短辺第一方向Ｘ１側及び短辺第二方向Ｘ２側において長辺方向Ｙに沿って複数（本例では合計７つ）設けられている。 As shown in FIG. 5, in this example, there are a plurality of module fixing portions 27 along the long side direction Y on the short side first direction X1 side and the short side second direction X2 side of the bus bar module 20 (total in this example). 7) provided.
　モジュール固定部２７は、バスバーモジュール２０の短辺第一方向Ｘ１側において、長辺方向Ｙに沿って回転電機接続端子２５を挟むように複数設けられている。具体的には、バスバーモジュール２０の短辺第一方向Ｘ１側に、４つのモジュール固定部２７が長辺方向Ｙに沿って均等な間隔で複数設けられており、これら４つのモジュール固定部２７の間に回転電機接続端子２５ａ～２５ｃが１つずつ配置されている。 The plurality of module fixing portions 27 are provided on the short side first direction X1 side of the bus bar module 20 so as to sandwich the rotating electrical machine connection terminal 25 along the long side direction Y. Specifically, a plurality of four module fixing portions 27 are provided at equal intervals along the long side direction Y on the short side first direction X1 side of the bus bar module 20. The rotating electrical machine connection terminals 25a to 25c are arranged one by one.
　また、モジュール固定部２７は、バスバーモジュール２０の短辺第二方向Ｘ２側において、長辺方向Ｙに沿って、コンデンサ接続端子３３を挟むように複数設けられている。具体的には、バスバーモジュール２０の短辺第二方向Ｘ２側に、３つのモジュール固定部２７が設けられており、これら３つのモジュール固定部２７の間に、コンデンサ接続端子３３が２つずつ配置されている。 Also, a plurality of module fixing portions 27 are provided on the short-side second direction X2 side of the bus bar module 20 so as to sandwich the capacitor connection terminal 33 along the long-side direction Y. Specifically, three module fixing portions 27 are provided on the short side second direction X2 side of the bus bar module 20, and two capacitor connection terminals 33 are arranged between the three module fixing portions 27. Has been.
　また、図４に示すように、バスバーモジュール２０には、制御基板４１を当該バスバーモジュール２０上に固定するための基板固定部２６が設けられている。制御基板４１は、この基板固定部２６に固定されている。本例では、基板固定部２６として、バスバーモジュール２０に対して直交第一方向Ｚ１に突出する円筒状部が設けられている。当該円筒状部は制御基板４１が固定された状態で、制御基板４１とバスバーモジュール２０との間に隙間が生じるように形成されている。このため、制御基板４１の直交第二方向Ｚ２側の面に、電流センサなどの各種素子を実装することが可能となっている。本例では、基板固定部２６には、直交方向Ｚのネジ穴が設けられており、固定部材（例えば、ボルト）により制御基板４１が固定される。 Further, as shown in FIG. 4, the bus bar module 20 is provided with a board fixing portion 26 for fixing the control board 41 on the bus bar module 20. The control board 41 is fixed to the board fixing part 26. In this example, a cylindrical portion that protrudes in the first orthogonal direction Z <b> 1 with respect to the bus bar module 20 is provided as the substrate fixing portion 26. The cylindrical portion is formed such that a gap is formed between the control board 41 and the bus bar module 20 in a state where the control board 41 is fixed. For this reason, it is possible to mount various elements such as a current sensor on the surface of the control board 41 on the second orthogonal direction Z2 side. In this example, the board fixing portion 26 is provided with screw holes in the orthogonal direction Z, and the control board 41 is fixed by a fixing member (for example, a bolt).
　本例では、基板固定部２６は、バスバーモジュール２０において、直交方向Ｚに見てモジュール固定部２７とは異なる位置に複数（本例では９つ）設けられている。 In this example, a plurality (nine in this example) of board fixing portions 26 are provided in the bus bar module 20 at positions different from the module fixing portion 27 when viewed in the orthogonal direction Z.
　図５に示すように、基板固定部２６は、バスバーモジュール２０の短辺第一方向Ｘ１側において、長辺方向Ｙに沿って複数設けられている。また、基板固定部２６は、短辺第一方向Ｘ１側において長辺方向Ｙに沿って均等な間隔で複数配置されている。本例では、バスバーモジュール２０の短辺第一方向Ｘ１側において、複数の基板固定部２６のそれぞれがモジュール固定部２７の短辺第二方向Ｘ２側に隣接していると共に、長辺方向Ｙに沿って一列に並んで配置されている。具体的には、バスバーモジュール２０の短辺第一方向Ｘ１側に、モジュール固定部２７と同数である４つの基板固定部２６が設けられており、これら４つの基板固定部２６の間に回転電機接続端子２５ａ～２５ｃが１つずつ配置されている。 As shown in FIG. 5, a plurality of substrate fixing portions 26 are provided along the long side direction Y on the short side first direction X1 side of the bus bar module 20. A plurality of substrate fixing portions 26 are arranged at equal intervals along the long-side direction Y on the short-side first direction X1 side. In this example, on the short-side first direction X1 side of the bus bar module 20, each of the plurality of board fixing portions 26 is adjacent to the short-side second direction X2 side of the module fixing portion 27, and in the long-side direction Y. It is arranged in a line along. Specifically, four board fixing parts 26, which are the same number as the module fixing parts 27, are provided on the short side first direction X 1 side of the bus bar module 20, and the rotating electric machine is interposed between these four board fixing parts 26. Connection terminals 25a to 25c are arranged one by one.
　また、基板固定部２６は、バスバーモジュール２０の短辺第二方向Ｘ２側に５つ設けられている。 Further, five substrate fixing portions 26 are provided on the short side second direction X2 side of the bus bar module 20.
　これらの基板固定部２６及びモジュール固定部２７は、直交方向Ｚに見て、接続支持体２１においてバスバー２３（２３ａ～２３ｅ）が配置されたバスバー配置領域とは異なる領域に設けられている。図示の例では、基板固定部２６及びモジュール固定部２７は、バスバー２３と干渉しないようにバスバー配置領域を囲む外側に分散して配置されている。 The board fixing part 26 and the module fixing part 27 are provided in a region different from the bus bar arrangement area where the bus bars 23 (23a to 23e) are arranged in the connection support 21 when viewed in the orthogonal direction Z. In the illustrated example, the board fixing part 26 and the module fixing part 27 are distributed and arranged outside the bus bar arrangement area so as not to interfere with the bus bar 23.
　また、図４に示すように、本実施形態においては、接続支持体２１は、複数のバスバー２３ａ～２５ｅを内部に保持する絶縁材料の成形体である。そして、基板固定部２６及びモジュール固定部２７は、接続支持体２１と一体的に成形されている。具体的には、接続支持体２１は、複数のバスバー２３ａ～２５ｅが内部に配置されるようにこれらのバスバー２３ａ～２５ｅの周囲に合成樹脂を射出成形することにより形成される。この際、本例では、基板固定部２６及びモジュール固定部２７のそれぞれに対応する位置に、円筒状部材やナット部材等を埋め込んだ状態で射出成形を行い、基板固定部２６及びモジュール固定部２７を接続支持体２１に一体成形する。 Further, as shown in FIG. 4, in the present embodiment, the connection support 21 is a molded body of an insulating material that holds a plurality of bus bars 23a to 25e therein. The substrate fixing part 26 and the module fixing part 27 are formed integrally with the connection support 21. Specifically, the connection support 21 is formed by injection molding a synthetic resin around the bus bars 23a to 25e so that the plurality of bus bars 23a to 25e are arranged inside. At this time, in this example, injection molding is performed in a state where a cylindrical member, a nut member, or the like is embedded in a position corresponding to each of the substrate fixing portion 26 and the module fixing portion 27, and Is integrally formed with the connection support 21.
　以上のような構成により、バスバーモジュール２０に制御基板４１を高精度に固定することができる。 With the above configuration, the control board 41 can be fixed to the bus bar module 20 with high accuracy.
３－２．バスバーモジュール及び制御基板上の構成部品
　本実施形態に係るインバータ装置１では、以上のように、バスバーモジュール２０と制御基板４１との相対位置の精度を高くすることができることを利用し、さらに、バスバーモジュール２０と制御基板４１上に実装される構成部品に関して、以下に述べる特徴構成を備えている。 3-2. As described above, the inverter device 1 according to the present embodiment utilizes the fact that the accuracy of the relative position between the bus bar module 20 and the control board 41 can be increased. The components mounted on the module 20 and the control board 41 have the following characteristic configuration.
＜電流センサ＞
　図４及び図８に示すように、制御基板４１には、バスバー２３を流れる電流を検出するコアレス電流センサ９１が配置されている。コアレス電流センサ９１は、制御基板４１の直交第二方向Ｚ２側の面において、バスバーモジュール２０に設けられた回転電機接続端子２５に繋がるバスバー２３の位置に対応して配置されている。本例では、Ｕ、Ｖ、Ｗ各相の回転電機接続端子２５ａ～２５ｃに繋がるバスバー２３ａ～２３ｃに対して１つずつ電流センサ９１ａ～９１ｃが備えられている。各電流センサ９１は、各バスバー２３と所定間隔を空けて直交方向Ｚ視で重複するように配置されている。 <Current sensor>
As shown in FIGS. 4 and 8, the control board 41 is provided with a coreless current sensor 91 that detects a current flowing through the bus bar 23. The coreless current sensor 91 is arranged on the surface of the control board 41 on the orthogonal second direction Z2 side so as to correspond to the position of the bus bar 23 connected to the rotating electrical machine connection terminal 25 provided in the bus bar module 20. In this example, one current sensor 91a to 91c is provided for each of the bus bars 23a to 23c connected to the rotating electrical machine connection terminals 25a to 25c of the U, V, and W phases. Each current sensor 91 is disposed so as to overlap with each bus bar 23 in the orthogonal direction Z with a predetermined interval.
　本実施形態においては、コアレス電流センサ９１は、長辺方向Ｙに沿って被支持部８２ａ～８２ｄの間に１つずつ配置されている。上記のとおり、被支持部８２及び被支持部８２に対応する基板固定部２６は、長辺方向Ｙ方向に沿って均等な間隔で複数配置されている。よって、コアレス電流センサ９１ａ～９１ｃが配置された制御基板４１は、被支持部８２ａ～８２ｄの間に１つずつ配置されたコアレス電流センサ９１ａ～９１ｃそれぞれの長辺方向Ｙの両側においてバスバーモジュール２０に支持されている。 In the present embodiment, one coreless current sensor 91 is disposed along the long side direction Y between the supported portions 82a to 82d. As described above, the supported portions 82 and the substrate fixing portions 26 corresponding to the supported portions 82 are arranged at equal intervals along the long-side direction Y direction. Therefore, the control board 41 on which the coreless current sensors 91a to 91c are arranged has the bus bar module 20 on both sides in the long side direction Y of each of the coreless current sensors 91a to 91c arranged one by one between the supported portions 82a to 82d. It is supported by.
　ところで、電流センサ９１ａ～９１ｃとバスバー２３ａ～２３ｃとの間隔が変動すると、バスバー２３ａ～２３ｃを流れる電流に対する電流センサ９１ａ～９１ｃの出力信号の感度が変化し、電流の検出誤差が生じる。ここでは、上記のように、各電流センサ９１ａ～９１ｃは、長辺方向Ｙの両側においてバスバーモジュール２０に支持されている。そのため、各電流センサ９１ａ～９１ｃが取り付けられた制御基板４１の部分の直交方向Ｚのたわみを低減することができる。よって、電流センサ９１ａ～９１ｃとバスバー２３ａ～２３ｃとの間隔が変動することを抑制でき、電流の検出誤差が生じることを抑制できる。また、図５から明らかなように、本実施形態の構成では、複数の被支持部８２ａ～８２ｄが均等な間隔で配置されていると共に、複数の電流センサ９１ａ～９１ｃのそれぞれが隣接する２つの被支持部８２の中間に配置されている。これにより、車両の振動等によって制御基板４１にたわみが発生した場合にも、複数の電流センサ９１ａ～９１ｃの全てについて同程度の大きさのたわみが発生するような構成となっている。これにより、複数の電流センサ９１ａ～９１ｃの間での検出値のばらつきを低減することが可能となっている。 Incidentally, when the distance between the current sensors 91a to 91c and the bus bars 23a to 23c varies, the sensitivity of the output signals of the current sensors 91a to 91c with respect to the current flowing through the bus bars 23a to 23c changes, and a current detection error occurs. Here, as described above, the current sensors 91a to 91c are supported by the bus bar module 20 on both sides in the long side direction Y. Therefore, it is possible to reduce the deflection in the orthogonal direction Z of the portion of the control board 41 to which the current sensors 91a to 91c are attached. Therefore, fluctuations in the distance between the current sensors 91a to 91c and the bus bars 23a to 23c can be suppressed, and occurrence of current detection errors can be suppressed. Further, as is apparent from FIG. 5, in the configuration of the present embodiment, the plurality of supported portions 82a to 82d are arranged at equal intervals, and each of the plurality of current sensors 91a to 91c is adjacent to each other. It is arranged in the middle of the supported portion 82. As a result, even when a deflection occurs in the control board 41 due to vehicle vibration or the like, the deflection of the same magnitude is generated in all of the plurality of current sensors 91a to 91c. As a result, it is possible to reduce variations in detected values among the plurality of current sensors 91a to 91c.
　なお、本実施形態においては、コアレス電流センサ９１は、シャント抵抗などを用いることなく、バスバー２３ａ、２３ｂ、２３ｃなどの交流電力線に対して非接触で交流電流を検出する非接触電流センサである。また、コアレス電流センサ９１は、バスバー２３を周回する集磁コアを用いずに交流電流を検出するセンサである。 In this embodiment, the coreless current sensor 91 is a non-contact current sensor that detects an AC current in a non-contact manner with respect to an AC power line such as the bus bars 23a, 23b, and 23c without using a shunt resistor or the like. The coreless current sensor 91 is a sensor that detects an alternating current without using a magnetic core that circulates around the bus bar 23.
＜電圧センサ＞
　図４及び図５に示すように、本実施形態においては、バスバーモジュール２０内の正極のバスバー２３ｄに電気的に接続された正極電圧検出端子３６、及び負極のバスバー２３ｅに電気的に接続された負極電圧検出端子３７とが、直交第一方向Ｚ１に延びるように設けられている。本実施形態における正極電圧検出端子３６及び負極電圧検出端子３７は、本発明における「ＰＮ端子」に相当する。 <Voltage sensor>
As shown in FIGS. 4 and 5, in this embodiment, the positive voltage detection terminal 36 electrically connected to the positive bus bar 23d in the bus bar module 20 and the negative bus bar 23e are electrically connected. A negative electrode voltage detection terminal 37 is provided so as to extend in the orthogonal first direction Z1. The positive voltage detection terminal 36 and the negative voltage detection terminal 37 in the present embodiment correspond to the “PN terminal” in the present invention.
　図４に示すように、正極電圧検出端子３６及び負極電圧検出端子３７は、バスバー２３ｄ、２３ｅから直交第一方向Ｚ１側に延出する棒状の導電部材である。一方、制御基板４１には、正極接続部８７及び負極接続部８８が設けられている。本実施形態では、正極接続部８７及び負極接続部８８は、制御基板４１を直交方向Ｚに貫通する貫通孔（スルーホール）とされている。正極電圧検出端子３６及び負極電圧検出端子３７は、正極接続部８７及び負極接続部８８と直交方向Ｚ視で重なる位置に設けられていると共に、これらの先端は、接続支持体２１よりも直交第一方向Ｚ１側に突出している。これにより、正極電圧検出端子３６及び負極電圧検出端子３７の先端部は、制御基板４１がバスバーモジュール２０の基板固定部２６に固定された状態で、制御基板４１に設けられた正極接続部８７及び負極接続部８８に挿入されるように形成されている。そして、正極接続部８７に正極電圧検出端子３６がはんだづけされ、負極接続部８８に負極電圧検出端子３７がはんだづけされる。 As shown in FIG. 4, the positive voltage detection terminal 36 and the negative voltage detection terminal 37 are rod-like conductive members extending from the bus bars 23d and 23e to the orthogonal first direction Z1 side. On the other hand, the control board 41 is provided with a positive electrode connecting portion 87 and a negative electrode connecting portion 88. In the present embodiment, the positive electrode connecting portion 87 and the negative electrode connecting portion 88 are through holes (through holes) penetrating the control board 41 in the orthogonal direction Z. The positive electrode voltage detection terminal 36 and the negative electrode voltage detection terminal 37 are provided at positions overlapping the positive electrode connection portion 87 and the negative electrode connection portion 88 in the orthogonal direction Z, and their tips are orthogonal to the connection support 21. It protrudes in one direction Z1. Thereby, the positive electrode voltage detection terminal 36 and the negative electrode voltage detection terminal 37 are connected to the positive electrode connection part 87 provided on the control board 41 in a state where the control board 41 is fixed to the board fixing part 26 of the bus bar module 20. It is formed so as to be inserted into the negative electrode connecting portion 88. The positive electrode voltage detection terminal 36 is soldered to the positive electrode connection portion 87, and the negative electrode voltage detection terminal 37 is soldered to the negative electrode connection portion 88.
　制御基板４１には、図示しない電圧センサが配置されており、正極接続部８７及び負極接続部８８は、当該電圧センサと電気的に接続されている。このため、制御基板４１が基板固定部２６に固定された状態で、正極電圧検出端子３６及び負極電圧検出端子３７の先端が正極接続部８７及び負極接続部８８に電気的に接続されると、正極電圧検出端子３６及び負極電圧検出端子３７と電圧センサとが電気的に接続される。このような構成により、バスバー２３の電圧を、バスバー２３ｄ、２３ｅから制御基板４１上の電圧センサに最短距離で入力することができる。この電圧センサの出力信号に基づいて、インバータ回路７に印加される直流電圧を検出することができる。 A voltage sensor (not shown) is disposed on the control board 41, and the positive electrode connecting portion 87 and the negative electrode connecting portion 88 are electrically connected to the voltage sensor. For this reason, when the tips of the positive voltage detection terminal 36 and the negative voltage detection terminal 37 are electrically connected to the positive electrode connection part 87 and the negative electrode connection part 88 in a state where the control board 41 is fixed to the board fixing part 26, The positive voltage detection terminal 36 and the negative voltage detection terminal 37 are electrically connected to the voltage sensor. With such a configuration, the voltage of the bus bar 23 can be input from the bus bars 23d and 23e to the voltage sensor on the control board 41 at the shortest distance. Based on the output signal of the voltage sensor, the DC voltage applied to the inverter circuit 7 can be detected.
＜フレキシブルプリント基板＞
　図４に示すように、インバータ装置１は、バスバーモジュール２０を挟んで配置されるスイッチング素子１４と制御基板４１に配置された接続端子９５とを電気的に接続するためのフレキシブルプリント基板１９を備えている。フレキシブルプリント基板１９は、その一方側端がスイッチング素子１４と電気的に接続されるとともに、他方側端が制御基板４１に配置された接続端子９５に接続されている。本実施形態では、インバータ装置１は、６つのスイッチング素子１４ａ～１４ｆそれぞれに対応し、６本のフレキシブルプリント基板１９ａ～１９ｆと６つの接続端子９５ａ～９５ｆとを備えている。 <Flexible printed circuit board>
As shown in FIG. 4, the inverter device 1 includes a flexible printed circuit board 19 for electrically connecting the switching element 14 disposed across the bus bar module 20 and the connection terminal 95 disposed on the control board 41. ing. One end of the flexible printed board 19 is electrically connected to the switching element 14, and the other end is connected to a connection terminal 95 disposed on the control board 41. In the present embodiment, the inverter device 1 includes six flexible printed boards 19a to 19f and six connection terminals 95a to 95f corresponding to the six switching elements 14a to 14f, respectively.
　各スイッチング素子１４の制御端子（ゲート端子）は、フレキシブルプリント基板１９を介して、制御基板４１に接続されており、当該制御基板４１に設けられたドライブ回路からの信号に応じて、それぞれ個別にスイッチング制御される。また、本実施形態のスイッチング素子１４は、素子温度や過電流などの素子異常を検出するための異常検出センサが設けられた複合素子であり、制御基板４１には、異常検出センサに対応する異常検出回路が設けられている。すなわち、制御基板４１に配置された接続端子９５は、当該異常検出回路とスイッチング素子１４とを電気的に接続する役割も果たしている。 The control terminal (gate terminal) of each switching element 14 is connected to the control board 41 via the flexible printed circuit board 19 and individually according to a signal from a drive circuit provided on the control board 41. Switching control is performed. In addition, the switching element 14 of the present embodiment is a composite element provided with an abnormality detection sensor for detecting element abnormality such as element temperature and overcurrent, and the control board 41 has an abnormality corresponding to the abnormality detection sensor. A detection circuit is provided. That is, the connection terminal 95 disposed on the control board 41 also serves to electrically connect the abnormality detection circuit and the switching element 14.
　図４、図５及び図８に示すように、本実施形態においては、バスバーモジュール２０は、フレキシブルプリント基板１９の延在方向の一部において、フレキシブルプリント基板１９の周囲を囲む貫通孔２８を備えている。すなわち、本実施形態においては、フレキシブルプリント基板１９は、貫通孔２８を通って、スイッチング素子１４と接続端子９５とを接続する。 As shown in FIGS. 4, 5, and 8, in this embodiment, the bus bar module 20 includes a through hole 28 that surrounds the periphery of the flexible printed circuit board 19 in a part of the extending direction of the flexible printed circuit board 19. ing. That is, in the present embodiment, the flexible printed circuit board 19 connects the switching element 14 and the connection terminal 95 through the through hole 28.
　貫通孔２８は、バスバーモジュール２０の短辺第一方向Ｘ１側において、長辺方向Ｙに沿って複数設けられている。貫通孔２８は、直交方向Ｚに見て、基板固定部２６及びバスバー２３が配置された領域とは異なる領域に設けられている。また、貫通孔２８ａ～２８ｆはそれぞれ、短辺方向Ｘに見て、対応するスイッチング素子１４ａ～１４ｆと重複する位置に設けられている。 A plurality of through holes 28 are provided along the long side direction Y on the short side first direction X1 side of the bus bar module 20. The through hole 28 is provided in a region different from the region in which the substrate fixing portion 26 and the bus bar 23 are disposed when viewed in the orthogonal direction Z. Further, the through holes 28a to 28f are provided at positions overlapping the corresponding switching elements 14a to 14f when viewed in the short side direction X, respectively.
　また、接続端子９５は、バスバーモジュール２０の短辺第一方向Ｘ１側において、長辺方向Ｙに沿って複数設けられている。接続端子９５は、直交方向Ｚに見て、被支持部８２及びコアレス電流センサ９１が配置された領域とは異なる領域に設けられている。さらに、接続端子９５ａ～９５ｆと貫通孔２８ａ～２８ｆとはそれぞれ、直交方向Ｚに見て、重複するように配置されている。 Further, a plurality of connection terminals 95 are provided along the long side direction Y on the short side first direction X1 side of the bus bar module 20. The connection terminal 95 is provided in a region different from the region where the supported portion 82 and the coreless current sensor 91 are disposed when viewed in the orthogonal direction Z. Further, the connection terminals 95a to 95f and the through holes 28a to 28f are arranged so as to overlap each other when viewed in the orthogonal direction Z.
　このように、本実施形態に係るインバータ装置１は、バスバーモジュール２０に設けられた貫通孔２８の壁面により、短辺方向Ｘ及び長辺方向Ｙへのフレキシブルプリント基板１９の移動を規制しながら、スイッチング素子１４と接続端子９５ａ～９５ｆとを短い距離で接続することが可能な構成となっている。 Thus, the inverter device 1 according to the present embodiment regulates the movement of the flexible printed circuit board 19 in the short side direction X and the long side direction Y by the wall surface of the through hole 28 provided in the bus bar module 20. The switching element 14 and the connection terminals 95a to 95f can be connected at a short distance.
〔その他の実施形態〕
　最後に、本発明のその他の実施形態について説明する。なお、以下に説明する各実施形態の構成は、それぞれ単独で適用されるものに限られず、矛盾が生じない限り、他の実施形態の構成と組み合わせて適用することも可能である。 [Other Embodiments]
Finally, other embodiments of the present invention will be described. Note that the configuration of each embodiment described below is not limited to being applied independently, and can be applied in combination with the configuration of other embodiments as long as no contradiction arises.
（１）上記の実施形態においては、インバータケース５が、回転電機ケース６４とは別体として形成される場合を例として説明した。しかし、本発明の実施形態はこれに限定されない。すなわち、インバータケース５の少なくとも一部が、回転電機ケース６４と一体的に構成されても構わない。 (1) In the above embodiment, the case where the inverter case 5 is formed separately from the rotating electrical machine case 64 has been described as an example. However, the embodiment of the present invention is not limited to this. That is, at least a part of the inverter case 5 may be configured integrally with the rotating electrical machine case 64.
（２）上記の実施形態においては、基板固定部２６及びモジュール固定部２７が、直交方向Ｚに見て接続支持体２１におけるバスバー２３が配置されたバスバー配置領域とは異なる領域に設けられている場合を例として説明した。しかし、本発明の実施形態はこれに限定されない。すなわち、基板固定部２６及びモジュール固定部２７の少なくとも一方が、直交方向Ｚに見て接続支持体２１におけるバスバー２３が配置されたバスバー配置領域と重複する領域に設けられていても構わない。 (2) In the above embodiment, the board fixing part 26 and the module fixing part 27 are provided in a region different from the bus bar arrangement region where the bus bar 23 in the connection support 21 is arranged when viewed in the orthogonal direction Z. The case has been described as an example. However, the embodiment of the present invention is not limited to this. That is, at least one of the substrate fixing part 26 and the module fixing part 27 may be provided in an area overlapping with the bus bar arrangement area where the bus bar 23 is arranged in the connection support 21 when viewed in the orthogonal direction Z.
（３）上記の実施形態においては、接続支持体２１と基板固定部２６とモジュール固定部２７とが一体的に成形されている場合を例として説明した。しかし、本発明の実施形態はこれに限定されない。すなわち、基板固定部２６及びモジュール固定部２７の少なくとも一方が、接続支持体２１と別部材で形成されていても構わない。 (3) In the above-described embodiment, the case where the connection support body 21, the board fixing part 26, and the module fixing part 27 are integrally formed has been described as an example. However, the embodiment of the present invention is not limited to this. That is, at least one of the substrate fixing part 26 and the module fixing part 27 may be formed of a member separate from the connection support 21.
（４）上記の実施形態においては、制御基板４１にコアレス電流センサ９１が配置されている場合を例として説明した。しかし、本発明の実施形態はこれに限定されない。すなわち、コアレス電流センサ９１に代えて、バスバー２３を周回する集磁コアを備えたコアあり電流センサを用いる構成としても良い。この場合において、電流センサが制御基板４１に配置されていてもよいが、制御基板４１と別れて配置されていてもよい。 (4) In the above embodiment, the case where the coreless current sensor 91 is disposed on the control board 41 has been described as an example. However, the embodiment of the present invention is not limited to this. That is, instead of the coreless current sensor 91, a cored current sensor including a magnetic flux collecting core that circulates around the bus bar 23 may be used. In this case, the current sensor may be arranged on the control board 41, but may be arranged separately from the control board 41.
（５）上記の実施形態においては、正極接続部８７及び負極接続部８８として、制御基板４１に貫通孔を備える場合を例として説明した。しかし、本発明の実施形態はこれに限定されない。すなわち、正極接続部８７及び負極接続部８８として、制御基板４１の直交第二方向Ｚ２側の面に正極電圧検出端子３６及び負極電圧検出端子３７に対応する接続端子を備える構成としても構わない。また、このような正極電圧検出端子３６及び負極電圧検出端子３７を備えず、他の方法によって直流電圧を検出する構成としてもよい。 (5) In the above embodiment, the case where the control board 41 is provided with through holes as the positive electrode connecting portion 87 and the negative electrode connecting portion 88 has been described as an example. However, the embodiment of the present invention is not limited to this. In other words, the positive electrode connection portion 87 and the negative electrode connection portion 88 may include a connection terminal corresponding to the positive voltage detection terminal 36 and the negative voltage detection terminal 37 on the surface on the orthogonal second direction Z2 side of the control board 41. Moreover, it is good also as a structure which does not provide such a positive voltage detection terminal 36 and a negative voltage detection terminal 37, but detects a DC voltage by another method.
（６）上記の実施形態においては、バスバーモジュール２０が貫通孔２８を備える場合を例として説明した。しかし、本発明の実施形態はこれに限定されない。すなわち、バスバーモジュール２０が貫通孔２８を備えず、フレキシブルプリント基板１９がバスバーモジュール２０とケース５の壁面との間を通るように構成しても構わない。また、スイッチング素子１４と制御基板４１との接続を、フレキシブルプリント基板１９以外の配線等によって接続する構成としても構わない。 (6) In the above embodiment, the case where the bus bar module 20 includes the through hole 28 has been described as an example. However, the embodiment of the present invention is not limited to this. That is, the bus bar module 20 may not be provided with the through hole 28 and the flexible printed circuit board 19 may be configured to pass between the bus bar module 20 and the wall surface of the case 5. Further, the switching element 14 and the control board 41 may be connected by a wiring other than the flexible printed board 19.
　インバータケースと、前記インバータケース内において所定の素子配置面に沿って配置され、直流電力と交流電力との間の電力変換を行うための複数のスイッチング素子と、前記複数のスイッチング素子を制御する制御基板と、を備えたインバータ装置として利用可能である。 An inverter case, a plurality of switching elements arranged along a predetermined element arrangement surface in the inverter case for performing power conversion between DC power and AC power, and control for controlling the plurality of switching elements And an inverter device provided with a substrate.
１　　　　：インバータ装置
５　　　　：インバータケース
１１ａ　　：素子載置面（素子配置面）
１４　　　：スイッチング素子
１９　　　：フレキシブルプリント基板
２０　　　：バスバーモジュール
２１　　　：接続支持体（保持部材）
２３　　　：バスバー
２６　　　：基板固定部
２７　　　：モジュール固定部
２８　　　：貫通孔
３６　　　：正極電圧検出端子（ＰＮ端子）
３７　　　：負極電圧検出端子（ＰＮ端子）
４１　　　：制御基板
９１　　　：コアレス電流センサ
Ｚ　　　　：直交方向（素子配置面に直交する方向） 1: Inverter device 5: Inverter case 11a: Element placement surface (element placement surface)
14: Switching element 19: Flexible printed circuit board 20: Bus bar module 21: Connection support (holding member)
23: Bus bar 26: Board fixing part 27: Module fixing part 28: Through hole 36: Positive voltage detection terminal (PN terminal)
37: Negative voltage detection terminal (PN terminal)
41: Control board 91: Coreless current sensor Z: Orthogonal direction (direction orthogonal to the element arrangement surface)

Claims (6)

  1. 　インバータケースと、
    　前記インバータケース内において所定の素子配置面に沿って配置され、直流電力と交流電力との間の電力変換を行うための複数のスイッチング素子と、
    　前記複数のスイッチング素子を制御する制御基板と、
    を備えたインバータ装置であって、
    　前記複数のスイッチング素子と電気的に接続されるバスバーモジュールを備え、
    　前記制御基板が、前記バスバーモジュールを挟んで前記複数のスイッチング素子とは反対側に配置され、
    　前記バスバーモジュールが、当該バスバーモジュールに設けられたモジュール固定部を介して前記インバータケースに固定され、
    　前記制御基板が、前記バスバーモジュールに設けられた基板固定部に固定されているインバータ装置。     An inverter case,
    A plurality of switching elements arranged along a predetermined element arrangement surface in the inverter case, for performing power conversion between DC power and AC power,
    A control board for controlling the plurality of switching elements;
    An inverter device comprising:
    A bus bar module electrically connected to the plurality of switching elements;
    The control board is disposed on the opposite side of the plurality of switching elements across the bus bar module,
    The bus bar module is fixed to the inverter case via a module fixing portion provided in the bus bar module,
    An inverter device in which the control board is fixed to a board fixing portion provided in the bus bar module.
  2. 　前記バスバーモジュールは、複数のバスバーと、当該複数のバスバーを一体保持する保持部材と、を備え、
    　前記モジュール固定部及び前記基板固定部が、前記素子配置面に直交する方向に見て前記保持部材における前記バスバーが配置されたバスバー配置領域とは異なる領域に設けられている請求項１に記載のインバータ装置。     The bus bar module includes a plurality of bus bars and a holding member that integrally holds the plurality of bus bars,
    The said module fixing | fixed part and the said board | substrate fixing | fixed part are provided in the area | region different from the bus-bar arrangement | positioning area | region where the said bus-bar is arrange | positioned in the said holding member seeing in the direction orthogonal to the said element arrangement | positioning surface. Inverter device.
  3. 　前記バスバーモジュールは、複数のバスバーと、当該複数のバスバーを一体保持する保持部材と、を備え、
    　前記保持部材は、前記複数のバスバーを内部に保持する絶縁材料の成形体であり、
    　前記モジュール固定部及び前記基板固定部が一体的に成形されている請求項１又は２に記載のインバータ装置。     The bus bar module includes a plurality of bus bars and a holding member that integrally holds the plurality of bus bars,
    The holding member is a molded body of an insulating material that holds the plurality of bus bars therein,
    The inverter device according to claim 1, wherein the module fixing portion and the substrate fixing portion are integrally formed.
  4. 　前記制御基板に前記バスバーモジュールのバスバーを流れる電流を検出するコアレス電流センサが配置されている請求項１から３のいずれか一項に記載のインバータ装置。 The inverter device according to any one of claims 1 to 3, wherein a coreless current sensor that detects a current flowing through the bus bar of the bus bar module is disposed on the control board.
  5. 　前記バスバーモジュール内の正極及び負極のバスバーに電気的に接続されたＰＮ端子が、前記バスバーモジュールから前記制御基板側へ向けて延びるように設けられ、
    　前記制御基板に電圧センサが配置され、
    　前記制御基板が前記基板固定部に固定された状態で、前記電圧センサと前記ＰＮ端子とが電気的に接続される請求項１から４のいずれか一項に記載のインバータ装置。     PN terminals electrically connected to the positive and negative bus bars in the bus bar module are provided to extend from the bus bar module toward the control board side,
    A voltage sensor is disposed on the control board;
    The inverter device according to any one of claims 1 to 4, wherein the voltage sensor and the PN terminal are electrically connected in a state where the control board is fixed to the board fixing portion.
  6. 　前記バスバーモジュールを挟んで配置される前記スイッチング素子と前記制御基板とを電気的に接続するフレキシブルプリント基板を備え、
    　前記バスバーモジュールは、前記フレキシブルプリント基板の延在方向の一部において、前記フレキシブルプリント基板の周囲を囲む貫通孔を備えている請求項１から５のいずれか一項に記載のインバータ装置。     A flexible printed circuit board that electrically connects the switching element and the control board disposed across the bus bar module;
    The inverter device according to claim 1, wherein the bus bar module includes a through hole that surrounds the periphery of the flexible printed circuit board in a part of the extending direction of the flexible printed circuit board.
PCT/JP2012/078531 2011-11-04 2012-11-02 Inverter device WO2013065849A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-242913 2011-11-04
JP2011242913A JP2013099213A (en) 2011-11-04 2011-11-04 Inverter device

Publications (1)

Publication Number Publication Date
WO2013065849A1 true WO2013065849A1 (en) 2013-05-10

Family

ID=48192186

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2012/078531 WO2013065849A1 (en) 2011-11-04 2012-11-02 Inverter device

Country Status (2)

Country Link
JP (1) JP2013099213A (en)
WO (1) WO2013065849A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016132851A1 (en) * 2015-02-19 2016-08-25 日立オートモティブシステムズ株式会社 Power conversion device
WO2022219078A1 (en) * 2021-04-16 2022-10-20 Molabo Gmbh Phase connection for electric motors for measuring phase currents

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6352741B2 (en) * 2014-09-11 2018-07-04 株式会社ケーヒン Power converter
JP6352740B2 (en) * 2014-09-11 2018-07-04 株式会社ケーヒン Power converter
JP2016092970A (en) * 2014-11-05 2016-05-23 三菱電機株式会社 Power conversion module
JP6693430B2 (en) * 2017-01-24 2020-05-13 株式会社豊田自動織機 Semiconductor module
DE102018206930A1 (en) * 2018-05-04 2019-11-07 Zf Friedrichshafen Ag Inverter for a vehicle and method for mounting an inverter for a vehicle

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003324903A (en) * 2002-04-26 2003-11-14 Denso Corp Inverter integrated motor for vehicle
JP2004275000A (en) * 1994-10-24 2004-09-30 Hitachi Industrial Equipment Systems Co Ltd Inverter arrangement
JP2005278296A (en) * 2004-03-24 2005-10-06 Toyota Motor Corp Capacitor device and power supply system having the same
JP2008215089A (en) * 2007-02-28 2008-09-18 Mitsubishi Heavy Ind Ltd Integrated-inverter electric compressor
WO2009104301A1 (en) * 2008-02-21 2009-08-27 アイシン・エィ・ダブリュ株式会社 Drive device control unit
JP2011055663A (en) * 2009-09-03 2011-03-17 Denso Corp Inverter device
JP2011114872A (en) * 2009-11-23 2011-06-09 Toyota Motor Corp Power conversion apparatus
JP2011217550A (en) * 2010-04-01 2011-10-27 Hitachi Automotive Systems Ltd Power conversion apparatus

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004275000A (en) * 1994-10-24 2004-09-30 Hitachi Industrial Equipment Systems Co Ltd Inverter arrangement
JP2003324903A (en) * 2002-04-26 2003-11-14 Denso Corp Inverter integrated motor for vehicle
JP2005278296A (en) * 2004-03-24 2005-10-06 Toyota Motor Corp Capacitor device and power supply system having the same
JP2008215089A (en) * 2007-02-28 2008-09-18 Mitsubishi Heavy Ind Ltd Integrated-inverter electric compressor
WO2009104301A1 (en) * 2008-02-21 2009-08-27 アイシン・エィ・ダブリュ株式会社 Drive device control unit
JP2011055663A (en) * 2009-09-03 2011-03-17 Denso Corp Inverter device
JP2011114872A (en) * 2009-11-23 2011-06-09 Toyota Motor Corp Power conversion apparatus
JP2011217550A (en) * 2010-04-01 2011-10-27 Hitachi Automotive Systems Ltd Power conversion apparatus

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016132851A1 (en) * 2015-02-19 2016-08-25 日立オートモティブシステムズ株式会社 Power conversion device
JPWO2016132851A1 (en) * 2015-02-19 2017-08-10 日立オートモティブシステムズ株式会社 Power converter
CN107343387A (en) * 2015-02-19 2017-11-10 日立汽车***株式会社 Power inverter
US10091903B2 (en) 2015-02-19 2018-10-02 Hitachi Automotive Systems, Ltd. Power conversion device having bus bar with improved vibration resistance
CN107343387B (en) * 2015-02-19 2019-07-09 日立汽车***株式会社 Power inverter
WO2022219078A1 (en) * 2021-04-16 2022-10-20 Molabo Gmbh Phase connection for electric motors for measuring phase currents

Also Published As

Publication number Publication date
JP2013099213A (en) 2013-05-20

Similar Documents

Publication Publication Date Title
WO2013065849A1 (en) Inverter device
JP5924164B2 (en) Semiconductor device
JP5622043B2 (en) Inverter device
US9018807B2 (en) Inverter device
US9065322B2 (en) Inverter device
US8693193B2 (en) Power converter
US8031479B2 (en) Power converter apparatus
JP4538474B2 (en) Inverter device
WO2013065848A1 (en) Control device for inverter circuit
JP2006140217A (en) Semiconductor module
JP4055643B2 (en) Inverter device
JP2018085792A (en) Semiconductor device
JP2010239811A (en) Inverter device
JP4064741B2 (en) Semiconductor device
JP5100535B2 (en) Power semiconductor module and semiconductor power conversion device including the same
JP6515836B2 (en) Inverter device
WO2020012936A1 (en) Switching element unit and switching element module
JP2013017335A (en) Inverter device
WO2013065847A1 (en) Inverter device
JP5062029B2 (en) Semiconductor device
WO2019193903A1 (en) Power conversion device and capacitor module
JP6754387B2 (en) Power converter
JP6782809B2 (en) Semiconductor module and power converter equipped with it
JP2019193443A (en) Electric power conversion system
JP4640424B2 (en) Power converter

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12846185

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12846185

Country of ref document: EP

Kind code of ref document: A1