WO2020040279A1 - Inverter unit and motor unit - Google Patents

Inverter unit and motor unit Download PDF

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Publication number
WO2020040279A1
WO2020040279A1 PCT/JP2019/032976 JP2019032976W WO2020040279A1 WO 2020040279 A1 WO2020040279 A1 WO 2020040279A1 JP 2019032976 W JP2019032976 W JP 2019032976W WO 2020040279 A1 WO2020040279 A1 WO 2020040279A1
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WO
WIPO (PCT)
Prior art keywords
bus bar
relay
unit
inverter
external connection
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Application number
PCT/JP2019/032976
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French (fr)
Japanese (ja)
Inventor
直記 岩上
恒之 齋藤
Original Assignee
日本電産エレシス株式会社
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.)
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Publication date
Application filed by 日本電産エレシス株式会社 filed Critical 日本電産エレシス株式会社
Priority to JP2020538479A priority Critical patent/JPWO2020040279A1/en
Priority to CN201980055016.3A priority patent/CN112602261A/en
Publication of WO2020040279A1 publication Critical patent/WO2020040279A1/en

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    • 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
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode

Definitions

  • the present invention relates to an inverter unit and a motor unit.
  • an inverter unit including an inverter for controlling a motor and a case accommodating the inverter is known.
  • Japanese Patent Application Laid-Open Publication No. 2003-199363 discloses an electric drive unit (inverter unit) in which components are stacked and fixed in the order of their size in consideration of compactness, assemblability, manufacturability, earthquake resistance and the like. Disclosed.
  • the inverter and capacitor of the inverter unit were housed in a cylindrical case having a bottom wall.
  • a bus bar or wiring to a component arranged near the bottom wall of the case, it is necessary to operate the connection portion through a narrow gap between the case and the component, and the efficiency of the assembly work is reduced. There were challenges.
  • an inverter unit attachable to a motor, the power unit including an inverter circuit, an inverter housing accommodating the power unit, and an external unit electrically connected to the power unit A connection bus bar, and the inverter housing has a lower case having a bottom wall and a cylindrical side wall extending upward from a peripheral edge of the bottom wall, and the external connection bus bar includes the lower case.
  • the power portion and the external connection bus bar are connected to each other at a bus bar connection portion located above an upper end surface of the side wall of the lower case.
  • an inverter unit capable of efficiently performing an assembling operation and a motor unit including the inverter unit are provided.
  • FIG. 1 is a perspective view of the inverter unit of the present embodiment as viewed from above.
  • FIG. 2 is a perspective view of the inverter unit of the present embodiment as viewed from below.
  • FIG. 3 is a partial sectional view of the inverter unit of the present embodiment.
  • FIG. 4 is a plan view showing the internal structure of the inverter unit of the present embodiment.
  • FIG. 5 is a perspective view showing the internal structure of the inverter unit of the present embodiment.
  • FIG. 6 is an exploded perspective view showing a connection structure around the external connection bus bar.
  • an XYZ coordinate system is appropriately shown as a three-dimensional orthogonal coordinate system.
  • the Z-axis direction indicates the vertical direction (that is, the vertical direction)
  • the + Z direction is the upper side (opposite to the direction of gravity)
  • the -Z direction is the lower side (the direction of gravity).
  • the X-axis direction is a direction orthogonal to the Z-axis direction, and in the present embodiment, indicates a direction along a short side of the inverter unit 1.
  • the Y-axis direction is a direction orthogonal to both the X-axis direction and the Z-axis direction, and indicates a direction along the long side of the inverter unit 1 in the present embodiment.
  • the motor unit 3 of the present embodiment is mounted on a vehicle that uses a motor as a power source, such as a hybrid vehicle (HEV), a plug-in hybrid vehicle (PHV), or an electric vehicle (EV), and is used as the power source.
  • a motor such as a hybrid vehicle (HEV), a plug-in hybrid vehicle (PHV), or an electric vehicle (EV), and is used as the power source.
  • the motor unit 3 may include a reduction gear (not shown) that reduces the rotation of the motor 2.
  • the inverter unit 1 converts a DC current into an AC current and supplies the AC current to the motor 2.
  • the inverter unit 1 includes an inverter housing 10, a control board 20, a power unit 30 including an inverter circuit, a capacitor 40, and a plurality of external connection bus bars 50.
  • the inverter housing 10 has a lower case 11 and a cover member 12 attached to an opening of the lower case 11.
  • the lower case 11 has a bottom wall 11a and a cylindrical side wall 11b extending upward from the periphery of the bottom wall 11a.
  • the cover member 12 has a top wall 12a and a cylindrical side wall 12b extending downward from the periphery of the top wall 12a.
  • the lower case 11 and the cover member 12 are bolted together with the upper end surface 11c of the side wall 11b and the lower end surface 12c of the side wall 12b facing each other.
  • the lower case 11 has a storage chamber 13 surrounded by a bottom wall 11a and a side wall 11b.
  • the control board 20, the power unit 30, the capacitor 40, and the external connection bus bar 50 are arranged inside the accommodation room 13 when viewed from above.
  • the accommodation room 13 includes a first accommodation room 13A and a second accommodation room 13B partitioned in the horizontal direction. That is, the inverter housing 10 has the first accommodation room 13A and the second accommodation room 13B.
  • the power unit 30 and the external connection bus bar 50 are arranged in the first accommodation room 13A.
  • the control board 20 and the capacitor 40 are arranged in the second accommodation room 13B.
  • the first storage chamber 13A has a substantially rectangular shape in plan view, as shown in FIG.
  • a cooling unit 60 is provided at the bottom of the first storage chamber 13A.
  • the cooling unit 60 has a coolant channel 11d.
  • the coolant channel 11d is a concave portion that opens on the upper surface side of the bottom wall 11a.
  • the coolant channel 11d is substantially rectangular in plan view.
  • the refrigerant flow path 11d is connected to the pipe connection terminals 14 and 15 on the side surface of the lower case 11 via a tubular flow path penetrating the bottom wall 11a.
  • the pipe connection terminals 14 and 15 are connected to an external refrigerant pipe.
  • the power section 30 is fixed on the refrigerant flow path 11d.
  • the second storage chamber 13B has a substantially rectangular shape elongated in the X-axis direction than the first storage chamber 13A.
  • the condenser 40 is fixed to the bottom of the second storage chamber 13B.
  • the control board 20 is fixed on the upper surface of the capacitor 40.
  • the control board 20 supplies a drive signal to the motor 2 via the power unit 30, and controls the motor 2.
  • the control board 20 is electrically connected to an encoder such as a resolver provided in the motor unit 3.
  • the control board 20 performs feedback control of the rotation speed and the torque based on the rotation speed and the current of the motor 2 based on the rotation information of the motor 2 output from the encoder.
  • the power unit 30 has a power board 31 and a semiconductor module 32 located below the power board 31.
  • the power board 31 and the semiconductor module 32 are both flat.
  • the semiconductor module 32 incorporates a three-phase inverter having six IGBTs (insulated gate bipolar transistors) in a case.
  • the semiconductor module 32 has a heat sink 32a composed of a plurality of pillars extending downward from the lower surface of the semiconductor module 32.
  • the semiconductor module 32 is fixed to the bottom wall 11a while covering the coolant flow path 11d from above.
  • the heat sink 32a is arranged in the coolant channel 11d.
  • a ring-shaped sealing member 33 is arranged so as to surround the periphery of the coolant channel 11d.
  • the coolant channel 11d is sealed by a sealing member 33 sandwiched between the upper surface of the bottom wall 11a and the semiconductor module 32.
  • the power board 31 for driving the semiconductor module 32 is disposed on the upper surface of the semiconductor module 32.
  • the power board 31 and the semiconductor module 32 are electrically connected via a plurality of connection pins 34 extending upward from the semiconductor module 32.
  • the semiconductor module 32 has six inverter input terminals 35 on the side surface facing the capacitor 40, as shown in FIG.
  • the inverter input terminal 35 is connected to six capacitor output terminals (not shown) extending from the capacitor 40.
  • the semiconductor module 32 has three output terminals 36U, 36V, 36W on the side surface opposite to the capacitor 40. That is, the power unit 30 has the output terminals 36U, 36V, 36W.
  • the output terminals 36U, 36V, 36W are connected to the relay bus bars 57U, 57V, 57W, respectively.
  • the output terminals 36U, 36V, and 36W of the power unit 30 may be collectively referred to as the output terminal 36.
  • the relay bus bars 57U, 57V, and 57W may be collectively referred to as a relay bus bar 57.
  • the relay bus bar 57 is a band-shaped metal plate as shown in FIGS.
  • the two relay bus bars 57U and 57W are L-shaped when viewed from above, and the other relay bus bar 57U is linear when viewed from above.
  • the relay bus bars 57U, 57V, 57W extend in the horizontal direction from the connection with the output terminals 36U, 36V, 36W, and are bent upward in the vicinity of the external connection bus bar 50.
  • the distal ends of the relay bus bars 57U, 57V, 57W are located above the upper end surface 11c of the lower case 11.
  • the relay bus bar 57 is connected to the output terminal 36 at a relay connection part 70 located on the side of the power part 30.
  • the relay connection part 70 includes a relay part support base 71 that supports the output terminal 36 of the power part 30 and the relay bus bar 57 from below, and the output terminals 36U and 36V of the power part 30. , 36W and the relay bus bar 57.
  • the bolt 72 is a relay section fixing member in the relay connection section 70.
  • the bolt 72 penetrates the relay bus bar 57 in the vertical direction, and is screwed into a screw hole of the output terminal 36 of the power unit 30. With this configuration, the relay bus bar 57 and the output terminal 36 can be easily and firmly fixed.
  • the relay support 71 is a rod-shaped member extending in the X-axis direction along the side surface of the power unit 30, as shown in FIGS.
  • the relay portion support base 71 has three terminal support portions 71a arranged at intervals along the length direction (Y-axis direction). That is, the relay portion support base 71 has a plurality of terminal support portions 71a arranged in a direction intersecting the vertical direction.
  • a relay section partition wall 71b extending in the vertical direction is located between the adjacent terminal support sections 71a. According to this configuration, the output terminals 36 can be mutually insulated by the relay section partition wall 71b.
  • the relay section support base 71 has a first positioning wall 71c extending upward from an end of the terminal support section 71a on the opposite side to the power section 30 at the three terminal support sections 71a.
  • the relay section support base 71 has three cylindrical positioning pins 71d extending upward from the upper surface.
  • the two positioning pins 71d extend upward from the upper surface of the relay section partition wall 71b.
  • the other positioning pin 71d extends upward from the upper end surface of the first positioning wall 71c located at the center.
  • the relay portion support base 71 has second positioning walls 71e extending upward from ends on the central portion side of the upper surface of the two relay portion partition walls 71b.
  • the second positioning wall 71e also functions as a partition wall that insulates the relay bus bars 57 arranged adjacent to each other.
  • the relay portion support base 71 has one flange portion 71f at each of both ends in the length direction.
  • the flange portion 71f has a through-hole penetrating the flange portion 71f in the up-down direction.
  • the relay portion support base 71 is fastened to the bottom wall 11a of the lower case 11 by a bolt 73 that is passed through a through hole of the flange portion 71f.
  • the output terminal 36 of the power unit 30 and the relay bus bar 57 are fastened on the terminal support 71 a of the relay support 71. As shown in FIG. 6, the output terminal 36 is disposed on the upper surface of the terminal support 71a. The upper surface of the output terminal 36 and the upper surface of the relay section partition wall 71b are substantially at the same height. Three relay bus bars 57 are arranged on the relay support 71.
  • the L-shaped relay bus bar 57U in plan view is arranged on the upper surface of the output terminal 36U and the relay section partition wall 71b.
  • the positioning pins 71d are passed through the through holes of the relay bus bar 57U.
  • the side surface of the relay bus bar 57U is positioned by the first positioning wall 71c and the second positioning wall 71e.
  • the bolt 72 is passed through the bolt insertion hole of the relay bus bar 57U, and is screwed into the screw hole of the output terminal 36U, whereby the relay bus bar 57U and the output terminal 36U are bolted.
  • the relay bus bar 57V is arranged on the output terminal 36V and the first positioning wall 71c.
  • the positioning pin 71d is passed through the through hole of the relay bus bar 57V.
  • the two side surfaces of the relay bus bar 57V facing the X-axis direction are positioned by the second positioning wall 71e.
  • the bolt 72 is passed through the bolt insertion hole of the relay bus bar 57V and tightened into the screw hole of the output terminal 36V, so that the relay bus bar 57V and the output terminal 36V are bolted.
  • the relay bus bar 57W is arranged in a state of being positioned on the output terminal 36W and the relay section partition wall 71b, similarly to the relay bus bar 57U, and is fastened using the bolt 72.
  • the bolt 72 is tightened while the output terminal 36 is supported from below by providing the relay portion support base 71. Can be. Thereby, when tightening the bolt 72, it is possible to suppress the bending stress from being applied to the power part 30.
  • the relay bus bar 57 is positioned by the first positioning wall 71c, the positioning pin 71d, and the second positioning wall 71e of the relay portion support base 71. Thereby, the assembling work of the relay connection unit 70 is facilitated.
  • a component in which the relay portion support base 71 and the relay bus bar 57 are integrated may be used. According to this configuration, workability when attaching the relay bus bar 57 to the external connection bus bar 50 is improved.
  • the relay bus bars 57U, 57V, and 57W are connected to the external connection bus bars 50U, 50V, and 50W at the bus bar connection unit 55, respectively.
  • the external connection bus bars 50U, 50V, and 50W may be collectively referred to as the external connection bus bar 50.
  • the external connection bus bar 50 is a band-shaped metal plate as shown in FIGS.
  • Each of the external connection bus bars 50U, 50V, 50W has a linear shape extending in the up-down direction.
  • the distal ends of the external connection bus bars 50U, 50V, 50W are located above the upper end surface 11c of the lower case 11.
  • the external connection bus bar 50 is held by a bus bar holder 52 shown in FIG.
  • the external connection bus bar 50 is insert-molded in a bus bar holder 52 made of resin.
  • the bus bar holder 52 includes a main body 52a that holds three external connection bus bars 50, four partition walls 52b extending upward from the upper surface of the main body 52a, and a horizontal direction from a lower end of the outer peripheral surface of the main body 52a.
  • An expanding flange portion 52c is provided to hold three external connection bus bars 50, four partition walls 52b extending upward from the upper surface of the main body 52a, and a horizontal direction from a lower end of the outer peripheral surface of the main body 52a.
  • the external connection bus bars 50U, 50V, and 50W are arranged side by side in the short side direction (X-axis direction) of the lower case 11 with their respective plate surfaces facing the power unit 30 side.
  • Each of the external connection bus bars 50U, 50V, 50W is located between the two partition walls 52b.
  • the partition wall 52b insulates the external connection bus bars 50 adjacent in the X-axis direction.
  • the busbar holder 52 is inserted from the lower surface side of the lower case 11 into a case through hole 11e vertically penetrating the bottom wall 11a of the lower case 11.
  • the busbar holder 52 is positioned in the up-down direction by the upper surface of the flange 52c abutting against the lower surface of the lower case 11.
  • the busbar holder 52 is fastened to the bottom wall 11a of the lower case 11 by a bolt passed through a through hole of the flange portion 52c.
  • the upper ends of the external connection bus bars 50U, 50V, 50W are arranged at substantially the same height as the upper ends of the relay bus bars 57U, 57V, 57W.
  • the relay bus bar 57U and the external connection bus bar 50U are fastened by bolts 54 extending in the horizontal direction in a state where the respective plate surfaces are overlapped.
  • the relay bus bar 57V and the external connection bus bar 50V, and the relay bus bar 57W and the external connection bus bar 50W are also fastened with the bolts 54 in a state where the respective plate surfaces are overlapped. That is, the relay bus bar 57 and the external connection bus bar 50 are fastened using the bolt 54 extending in a direction intersecting the vertical direction.
  • a connection portion between the relay bus bar 57 and the external connection bus bar 50 by the bolt 54 is a bus bar connection portion 55 in the inverter unit 1.
  • the bus bar connection portion 55 is located above the upper end surface 11 c of the lower case 11. That is, with the cover member 12 removed, the bus bar connection portion 55 is located outside the accommodation room 13 of the lower case 11. According to this configuration, in the connection work between the relay bus bar 57 and the external connection bus bar 50, the side wall 11b of the lower case 11 does not interfere, and the assembling work can be performed efficiently.
  • the relay bus bar 57 and the external connection bus bar 50 are fastened in a state where their respective board surfaces are overlapped, so that the occupied space of the bus bar connection portion 55 can be reduced.
  • the inverter unit 1 of the present embodiment has a relay bus bar 57 that connects the power unit 30 and the external connection bus bar 50.
  • the bus bar connection portion 55 can be disposed above the upper end surface 11c of the lower case 11 without changing the position of the output terminal 36 of the power unit 30. According to this configuration, the work of screwing the relay bus bar 57 to the external connection bus bar 50 becomes easy.
  • the output terminals 36U, 36V, and 36W of the power unit 30 may have a shape extending upward from the semiconductor module 32.
  • the power unit 30 and the external connection bus bar 50 can be directly connected in the bus bar connection unit 55 without using the relay bus bar 57.
  • the power unit 30 and the external connection bus bar 50 are fastened by the bolts 54 extending in the horizontal direction at the bus bar connection portion 55 located above the upper end surface 11c of the lower case 11, so that the inverter unit 1 Can be easily assembled.
  • the external connection bus bar 50 is arranged to penetrate the bottom wall 11a in and out, but the external connection bus bar 50 may be arranged to penetrate the side wall 11b in and out. Also in this case, the workability improvement effect can be obtained by arranging the bus bar connection portion 55 above the upper end surface 11c of the lower case 11.

Abstract

Provided is an inverter unit which can be attached to a motor, wherein: the inverter unit comprises a power unit which contains an inverter circuit, an inverter housing which houses the power unit, and an external connection bus bar which is electrically connected to the power unit; the inverter housing has a lower case having a bottom wall and a tubular side wall extending upward from the periphery of the bottom wall; the external connection bus bar is disposed in a manner penetrating through the bottom wall or side wall of the lower case; and the power unit and the external connection bus bar are connected at a bus bar connection portion which is positioned higher than the top end surface of the side wall of the lower case.

Description

インバータユニット、モータユニットInverter unit, motor unit
　本発明は、インバータユニット、モータユニットに関する。 The present invention relates to an inverter unit and a motor unit.
　従来、モータを制御するためインバータとインバータを収容するケースとを備えたインバータユニットが知られる。日本国公開公報特開２００３－１９９３６３号公報には、コンパクト性、組立性、製造性および耐震性等を考慮して各部品の大きさの順に積み重ねて固定する電動駆動装置ユニット（インバータユニット）が開示される。 Conventionally, an inverter unit including an inverter for controlling a motor and a case accommodating the inverter is known. Japanese Patent Application Laid-Open Publication No. 2003-199363 discloses an electric drive unit (inverter unit) in which components are stacked and fixed in the order of their size in consideration of compactness, assemblability, manufacturability, earthquake resistance and the like. Disclosed.
日本国公開公報特開２００３－１９９３６３号公報Japanese Patent Laid-Open Publication No. 2003-199363
　インバータユニットのインバータおよびコンデンサは、底壁を有する筒状のケースに収容されていた。この構成では、ケースの底壁付近に配置される部品に対してバスバーまたは配線を接続しようとすると、ケースと部品との狭い隙間を通じて接続部分を操作する必要があり、組み立て作業の効率が低くなる課題があった。 イ ン バ ー タ The inverter and capacitor of the inverter unit were housed in a cylindrical case having a bottom wall. In this configuration, when connecting a bus bar or wiring to a component arranged near the bottom wall of the case, it is necessary to operate the connection portion through a narrow gap between the case and the component, and the efficiency of the assembly work is reduced. There were challenges.
　本発明の一態様によれば、モータに取り付け可能なインバータユニットであって、インバータ回路を含むパワー部と、前記パワー部を収容するインバータ筐体と、前記パワー部に電気的に接続される外部接続バスバー、とを備え、前記インバータ筐体は、底壁と、前記底壁の周縁から上側に延びる筒状の側壁とを有する下側ケースを有し、前記外部接続バスバーは、前記下側ケースの前記底壁または前記側壁を内外に貫通して配置され、前記パワー部と前記外部接続バスバーとは、前記下側ケースの前記側壁の上端面よりも上側に位置するバスバー接続部において接続される、インバータユニットが提供される。 According to one embodiment of the present invention, an inverter unit attachable to a motor, the power unit including an inverter circuit, an inverter housing accommodating the power unit, and an external unit electrically connected to the power unit A connection bus bar, and the inverter housing has a lower case having a bottom wall and a cylindrical side wall extending upward from a peripheral edge of the bottom wall, and the external connection bus bar includes the lower case. The power portion and the external connection bus bar are connected to each other at a bus bar connection portion located above an upper end surface of the side wall of the lower case. , An inverter unit is provided.
　本発明の一態様によれば、組み立て作業を効率よく実施できるインバータユニット、および上記インバータユニットを備えるモータユニットが提供される。 According to one embodiment of the present invention, an inverter unit capable of efficiently performing an assembling operation and a motor unit including the inverter unit are provided.
図１は、本実施形態のインバータユニットを上側から見た斜視図である。FIG. 1 is a perspective view of the inverter unit of the present embodiment as viewed from above. 図２は、本実施形態のインバータユニットを下側から見た斜視図である。FIG. 2 is a perspective view of the inverter unit of the present embodiment as viewed from below. 図３は、本実施形態のインバータユニットの部分断面図である。FIG. 3 is a partial sectional view of the inverter unit of the present embodiment. 図４は、本実施形態のインバータユニットの内部構造を示す平面図である。FIG. 4 is a plan view showing the internal structure of the inverter unit of the present embodiment. 図５は、本実施形態のインバータユニットの内部構造を示す斜視図である。FIG. 5 is a perspective view showing the internal structure of the inverter unit of the present embodiment. 図６は、外部接続バスバー周辺の接続構造を示す分解斜視図である。FIG. 6 is an exploded perspective view showing a connection structure around the external connection bus bar.
　以下、図面を用いて本発明の実施の形態について説明する。
　以下の説明では、インバータユニット１が水平な路面上に位置する車両に搭載された場合の位置関係を基に、重力方向を規定して説明する。また、図面においては、適宜三次元直交座標系としてＸＹＺ座標系を示す。ＸＹＺ座標系において、Ｚ軸方向は、鉛直方向（すなわち上下方向）を示し、＋Ｚ方向が上側（重力方向の反対側）であり、－Ｚ方向が下側（重力方向）である。また、Ｘ軸方向は、Ｚ軸方向と直交する方向であり、本実施形態ではインバータユニット１の短辺に沿う方向を示す。Ｙ軸方向は、Ｘ軸方向とＺ軸方向との両方と直交する方向であり、本実施形態ではインバータユニット１の長辺に沿う方向を示す。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the following description, the direction of gravity is defined and described based on the positional relationship when the inverter unit 1 is mounted on a vehicle located on a horizontal road surface. In the drawings, an XYZ coordinate system is appropriately shown as a three-dimensional orthogonal coordinate system. In the XYZ coordinate system, the Z-axis direction indicates the vertical direction (that is, the vertical direction), the + Z direction is the upper side (opposite to the direction of gravity), and the -Z direction is the lower side (the direction of gravity). Further, the X-axis direction is a direction orthogonal to the Z-axis direction, and in the present embodiment, indicates a direction along a short side of the inverter unit 1. The Y-axis direction is a direction orthogonal to both the X-axis direction and the Z-axis direction, and indicates a direction along the long side of the inverter unit 1 in the present embodiment.
　インバータユニット１は、図３に示すように、モータユニット３に備えられる。モータユニット３は、インバータユニット１とモータ２とを有する。インバータユニット１は、モータ２の上面に設置される。したがって、インバータユニット１の下面がモータ２と接続されるモータ接続部１０Ａである。モータ接続部１０Ａは、インバータユニット１とモータ２とを機械的に接続する部位である。インバータユニット１とモータ２との接続構造としては、ボルト締結を用いることができる。インバータユニット１とモータ２との着脱が不要であれば、リベット締結または溶接を用いてもよい。モータ接続部１０Ａにブラケットを取り付け、上記ブラケットを介してインバータユニット１とモータ２とを接続してもよい。
　モータ２は、インバータユニット１から交流電流を供給される。モータ２は、インバータユニット１により、制御される。インバータユニット１は、モータ２のステータのコイル線と接続される。 The inverter unit 1 is provided in the motor unit 3, as shown in FIG. The motor unit 3 has an inverter unit 1 and a motor 2. The inverter unit 1 is installed on the upper surface of the motor 2. Therefore, the lower surface of the inverter unit 1 is the motor connection portion 10A connected to the motor 2. The motor connection part 10A is a part that mechanically connects the inverter unit 1 and the motor 2. As a connection structure between the inverter unit 1 and the motor 2, bolt fastening can be used. If it is not necessary to attach / detach the inverter unit 1 and the motor 2, rivet fastening or welding may be used. A bracket may be attached to the motor connecting portion 10A, and the inverter unit 1 and the motor 2 may be connected via the bracket.
The motor 2 is supplied with an alternating current from the inverter unit 1. The motor 2 is controlled by the inverter unit 1. Inverter unit 1 is connected to a coil wire of a stator of motor 2.
　本実施形態のモータユニット３は、ハイブリッド自動車（ＨＥＶ）、プラグインハイブリッド自動車（ＰＨＶ）、電気自動車（ＥＶ）等、モータを動力源とする車両に搭載され、その動力源として使用される。モータユニット３は、モータ２の回転を減速する減速装置（図示略）を備えていてもよい。 The motor unit 3 of the present embodiment is mounted on a vehicle that uses a motor as a power source, such as a hybrid vehicle (HEV), a plug-in hybrid vehicle (PHV), or an electric vehicle (EV), and is used as the power source. The motor unit 3 may include a reduction gear (not shown) that reduces the rotation of the motor 2.
　インバータユニット１は、直流電流を交流電流に変換してモータ２に供給する。図１から図４に示すように、インバータユニット１は、インバータ筐体１０と、制御基板２０と、インバータ回路を含むパワー部３０と、コンデンサ４０と、複数の外部接続バスバー５０と、を備える。 (4) The inverter unit 1 converts a DC current into an AC current and supplies the AC current to the motor 2. As shown in FIGS. 1 to 4, the inverter unit 1 includes an inverter housing 10, a control board 20, a power unit 30 including an inverter circuit, a capacitor 40, and a plurality of external connection bus bars 50.
　インバータ筐体１０は、下側ケース１１と、下側ケース１１の開口部に取り付けられるカバー部材１２とを有する。下側ケース１１は、底壁１１ａと、底壁１１ａの周縁から上側に延びる筒状の側壁１１ｂとを有する。カバー部材１２は、頂壁１２ａと、頂壁１２ａの周縁から下側に延びる筒状の側壁１２ｂとを有する。下側ケース１１とカバー部材１２は、側壁１１ｂの上端面１１ｃと、側壁１２ｂの下端面１２ｃとを対向させた状態でボルト締結される。 The inverter housing 10 has a lower case 11 and a cover member 12 attached to an opening of the lower case 11. The lower case 11 has a bottom wall 11a and a cylindrical side wall 11b extending upward from the periphery of the bottom wall 11a. The cover member 12 has a top wall 12a and a cylindrical side wall 12b extending downward from the periphery of the top wall 12a. The lower case 11 and the cover member 12 are bolted together with the upper end surface 11c of the side wall 11b and the lower end surface 12c of the side wall 12b facing each other.
　下側ケース１１は、底壁１１ａと側壁１１ｂとに囲まれる収容室１３を有する。上側から見て収容室１３の内側に、制御基板２０、パワー部３０、コンデンサ４０、および外部接続バスバー５０が配置される。
　収容室１３は、水平方向に区画される第１の収容室１３Ａと第２の収容室１３Ｂとを含む。すなわち、インバータ筐体１０は、第１の収容室１３Ａおよび第２の収容室１３Ｂを有する。パワー部３０および外部接続バスバー５０は、第１の収容室１３Ａ内に配置される。制御基板２０およびコンデンサ４０は第２の収容室１３Ｂ内に配置される。 The lower case 11 has a storage chamber 13 surrounded by a bottom wall 11a and a side wall 11b. The control board 20, the power unit 30, the capacitor 40, and the external connection bus bar 50 are arranged inside the accommodation room 13 when viewed from above.
The accommodation room 13 includes a first accommodation room 13A and a second accommodation room 13B partitioned in the horizontal direction. That is, the inverter housing 10 has the first accommodation room 13A and the second accommodation room 13B. The power unit 30 and the external connection bus bar 50 are arranged in the first accommodation room 13A. The control board 20 and the capacitor 40 are arranged in the second accommodation room 13B.
　第１の収容室１３Ａは、図４に示すように、平面視で略矩形状である。第１の収容室１３Ａの底部には、図２に示すように、冷却部６０が設けられる。冷却部６０は、冷媒流路１１ｄを有する。冷媒流路１１ｄは、底壁１１ａの上面側に開口する凹部である。冷媒流路１１ｄは平面視で略矩形状である。冷媒流路１１ｄは、底壁１１ａを貫通する管状流路を介して下側ケース１１側面の配管接続端子１４、１５に接続される。配管接続端子１４、１５は外部の冷媒配管と接続される。冷媒流路１１ｄ上には、パワー部３０が固定される。 (4) The first storage chamber 13A has a substantially rectangular shape in plan view, as shown in FIG. As shown in FIG. 2, a cooling unit 60 is provided at the bottom of the first storage chamber 13A. The cooling unit 60 has a coolant channel 11d. The coolant channel 11d is a concave portion that opens on the upper surface side of the bottom wall 11a. The coolant channel 11d is substantially rectangular in plan view. The refrigerant flow path 11d is connected to the pipe connection terminals 14 and 15 on the side surface of the lower case 11 via a tubular flow path penetrating the bottom wall 11a. The pipe connection terminals 14 and 15 are connected to an external refrigerant pipe. The power section 30 is fixed on the refrigerant flow path 11d.
　第２の収容室１３Ｂは、図４に示すように、第１の収容室１３ＡよりもＸ軸方向に細長い略矩形状である。第２の収容室１３Ｂの底部に、コンデンサ４０が固定される。コンデンサ４０の上面に、制御基板２０が固定される。 (4) As shown in FIG. 4, the second storage chamber 13B has a substantially rectangular shape elongated in the X-axis direction than the first storage chamber 13A. The condenser 40 is fixed to the bottom of the second storage chamber 13B. The control board 20 is fixed on the upper surface of the capacitor 40.
　制御基板２０は、パワー部３０を介してモータ２に駆動信号を供給し、モータ２を制御する。制御基板２０は、モータユニット３に設けられるレゾルバ等のエンコーダと電気的に接続される。制御基板２０は、エンコーダから出力されるモータ２の回転情報に基づいて、モータ２の回転数と電流により回転数およびトルクをフィードバック制御する。 (4) The control board 20 supplies a drive signal to the motor 2 via the power unit 30, and controls the motor 2. The control board 20 is electrically connected to an encoder such as a resolver provided in the motor unit 3. The control board 20 performs feedback control of the rotation speed and the torque based on the rotation speed and the current of the motor 2 based on the rotation information of the motor 2 output from the encoder.
　コンデンサ４０は、図１および図４に示すように、配線９ａを介して外部電源装置９に接続される。配線９ａは、配線９ａの終端に設けられる配線端子９ｂを介してコンデンサ４０のコンデンサ入力端子４１に接続される。外部電源装置９は、例えば車両に搭載された二次電池である。インバータユニット１は、外部電源装置９から供給される直流電流を交流電流に変換し、外部接続バスバー５０を介してモータ２に供給する。 (1) The capacitor 40 is connected to the external power supply 9 via the wiring 9a as shown in FIGS. Wiring 9a is connected to capacitor input terminal 41 of capacitor 40 via wiring terminal 9b provided at the end of wiring 9a. The external power supply 9 is, for example, a secondary battery mounted on a vehicle. The inverter unit 1 converts a direct current supplied from the external power supply device 9 into an alternating current, and supplies the alternating current to the motor 2 via the external connection bus bar 50.
　パワー部３０は、パワー基板３１と、パワー基板３１の下側に位置する半導体モジュール３２とを有する。本実施形態の場合、パワー基板３１および半導体モジュール３２は、いずれも平板状である。 The power unit 30 has a power board 31 and a semiconductor module 32 located below the power board 31. In the case of the present embodiment, the power board 31 and the semiconductor module 32 are both flat.
　半導体モジュール３２は、６個のＩＧＢＴ（絶縁ゲートバイポーラトランジスタ）を有する三相インバータをケース内に内蔵する。半導体モジュール３２は、図３に示すように、半導体モジュール３２の下面から下側へ延びる複数の柱状体からなるヒートシンク３２ａを有する。半導体モジュール３２は、冷媒流路１１ｄを上側から覆った状態で底壁１１ａに固定される。ヒートシンク３２ａは冷媒流路１１ｄ内に配置される。冷媒流路１１ｄの周囲を囲んでリング状の封止部材３３が配置される。冷媒流路１１ｄは、底壁１１ａの上面と半導体モジュール３２との間に挟まれる封止部材３３により封止される。 The semiconductor module 32 incorporates a three-phase inverter having six IGBTs (insulated gate bipolar transistors) in a case. As shown in FIG. 3, the semiconductor module 32 has a heat sink 32a composed of a plurality of pillars extending downward from the lower surface of the semiconductor module 32. The semiconductor module 32 is fixed to the bottom wall 11a while covering the coolant flow path 11d from above. The heat sink 32a is arranged in the coolant channel 11d. A ring-shaped sealing member 33 is arranged so as to surround the periphery of the coolant channel 11d. The coolant channel 11d is sealed by a sealing member 33 sandwiched between the upper surface of the bottom wall 11a and the semiconductor module 32.
　半導体モジュール３２の上面に、半導体モジュール３２を駆動するパワー基板３１が配置される。パワー基板３１と半導体モジュール３２とは、半導体モジュール３２から上側へ延びる複数の接続ピン３４を介して電気的に接続される。 (4) The power board 31 for driving the semiconductor module 32 is disposed on the upper surface of the semiconductor module 32. The power board 31 and the semiconductor module 32 are electrically connected via a plurality of connection pins 34 extending upward from the semiconductor module 32.
　半導体モジュール３２は、図４に示すように、コンデンサ４０と対向する側面に、６本のインバータ入力端子３５を有する。インバータ入力端子３５は、コンデンサ４０から延びる図示しない６本のコンデンサ出力端子に接続される。半導体モジュール３２は、コンデンサ４０と反対側の側面に、３本の出力端子３６Ｕ、３６Ｖ、３６Ｗを有する。すなわち、パワー部３０は、出力端子３６Ｕ、３６Ｖ、３６Ｗを有する。 (4) The semiconductor module 32 has six inverter input terminals 35 on the side surface facing the capacitor 40, as shown in FIG. The inverter input terminal 35 is connected to six capacitor output terminals (not shown) extending from the capacitor 40. The semiconductor module 32 has three output terminals 36U, 36V, 36W on the side surface opposite to the capacitor 40. That is, the power unit 30 has the output terminals 36U, 36V, 36W.
　出力端子３６Ｕ、３６Ｖ、３６Ｗは、それぞれ、中継バスバー５７Ｕ、５７Ｖ、５７Ｗと接続される。以下の説明では、パワー部３０の出力端子３６Ｕ、３６Ｖ、３６Ｗを総称して出力端子３６と記載することがある。また中継バスバー５７Ｕ、５７Ｖ、５７Ｗを総称して中継バスバー５７と記載することがある。 The output terminals 36U, 36V, 36W are connected to the relay bus bars 57U, 57V, 57W, respectively. In the following description, the output terminals 36U, 36V, and 36W of the power unit 30 may be collectively referred to as the output terminal 36. Further, the relay bus bars 57U, 57V, and 57W may be collectively referred to as a relay bus bar 57.
　中継バスバー５７は、図４から図６に示すように、帯状の金属板である。２本の中継バスバー５７Ｕ、５７Ｗは、上側から見てＬ形であり、他の１本の中継バスバー５７Ｕは上側から見て直線状である。中継バスバー５７Ｕ、５７Ｖ、５７Ｗは、出力端子３６Ｕ、３６Ｖ、３６Ｗとの接続部から水平方向へ延び、外部接続バスバー５０の近傍において上側へ折り曲げられている。中継バスバー５７Ｕ、５７Ｖ、５７Ｗの先端部は、下側ケース１１の上端面１１ｃよりも上側に位置する。 The relay bus bar 57 is a band-shaped metal plate as shown in FIGS. The two relay bus bars 57U and 57W are L-shaped when viewed from above, and the other relay bus bar 57U is linear when viewed from above. The relay bus bars 57U, 57V, 57W extend in the horizontal direction from the connection with the output terminals 36U, 36V, 36W, and are bent upward in the vicinity of the external connection bus bar 50. The distal ends of the relay bus bars 57U, 57V, 57W are located above the upper end surface 11c of the lower case 11.
　中継バスバー５７は、パワー部３０の側方に位置する中継接続部７０において出力端子３６と接続される。中継接続部７０は、図３および図６に示すように、パワー部３０の出力端子３６と中継バスバー５７とを下側から支持する中継部支持台７１と、パワー部３０の出力端子３６Ｕ、３６Ｖ、３６Ｗと中継バスバー５７とを接続するボルト７２と、を有する。 The relay bus bar 57 is connected to the output terminal 36 at a relay connection part 70 located on the side of the power part 30. As shown in FIGS. 3 and 6, the relay connection part 70 includes a relay part support base 71 that supports the output terminal 36 of the power part 30 and the relay bus bar 57 from below, and the output terminals 36U and 36V of the power part 30. , 36W and the relay bus bar 57.
　ボルト７２は、中継接続部７０における中継部固定部材である。ボルト７２は、中継バスバー５７を上下方向に貫通し、パワー部３０の出力端子３６のネジ穴に締め込まれる。この構成により、中継バスバー５７と出力端子３６とを容易かつ強固に固定できる。 The bolt 72 is a relay section fixing member in the relay connection section 70. The bolt 72 penetrates the relay bus bar 57 in the vertical direction, and is screwed into a screw hole of the output terminal 36 of the power unit 30. With this configuration, the relay bus bar 57 and the output terminal 36 can be easily and firmly fixed.
　中継部支持台７１は、図５および図６に示すように、パワー部３０の側面に沿ってＸ軸方向に延びる棒状の部材である。中継部支持台７１は、長さ方向（Ｙ軸方向）に沿って互いに間隔を空けて配置される３箇所の端子支持部７１ａを有する。すなわち、中継部支持台７１は、上下方向と交差する方向に並ぶ複数の端子支持部７１ａを有する。隣り合う端子支持部７１ａの間には、上下方向に延びる中継部区画壁７１ｂが位置する。この構成によれば、中継部区画壁７１ｂによって出力端子３６を相互に絶縁できる。 5) The relay support 71 is a rod-shaped member extending in the X-axis direction along the side surface of the power unit 30, as shown in FIGS. The relay portion support base 71 has three terminal support portions 71a arranged at intervals along the length direction (Y-axis direction). That is, the relay portion support base 71 has a plurality of terminal support portions 71a arranged in a direction intersecting the vertical direction. A relay section partition wall 71b extending in the vertical direction is located between the adjacent terminal support sections 71a. According to this configuration, the output terminals 36 can be mutually insulated by the relay section partition wall 71b.
　中継部支持台７１は、３箇所の端子支持部７１ａにおいて、端子支持部７１ａのパワー部３０と反対側の端部から上側へ延びる第１位置決め壁７１ｃを有する。
　中継部支持台７１は、上面から上側へ延びる３本の円柱状の位置決めピン７１ｄを有する。２本の位置決めピン７１ｄは、中継部区画壁７１ｂの上面から上側へ延びる。他の１本の位置決めピン７１ｄは、中央に位置する第１位置決め壁７１ｃの上端面から上側へ延びる。
　中継部支持台７１は、２箇所の中継部区画壁７１ｂの上面の中央部側の端部からそれぞれ上側へ延びる第２位置決め壁７１ｅを有する。第２位置決め壁７１ｅは、隣り合って配置される中継バスバー５７同士を絶縁する区画壁としても機能する。 The relay section support base 71 has a first positioning wall 71c extending upward from an end of the terminal support section 71a on the opposite side to the power section 30 at the three terminal support sections 71a.
The relay section support base 71 has three cylindrical positioning pins 71d extending upward from the upper surface. The two positioning pins 71d extend upward from the upper surface of the relay section partition wall 71b. The other positioning pin 71d extends upward from the upper end surface of the first positioning wall 71c located at the center.
The relay portion support base 71 has second positioning walls 71e extending upward from ends on the central portion side of the upper surface of the two relay portion partition walls 71b. The second positioning wall 71e also functions as a partition wall that insulates the relay bus bars 57 arranged adjacent to each other.
　中継部支持台７１は、長さ方向の両端部に１つずつのフランジ部７１ｆを有する。フランジ部７１ｆは、フランジ部７１ｆを上下方向に貫通する貫通孔を有する。中継部支持台７１は、図３に示すように、フランジ部７１ｆの貫通孔に通されるボルト７３により、下側ケース１１の底壁１１ａに締結される。 The relay portion support base 71 has one flange portion 71f at each of both ends in the length direction. The flange portion 71f has a through-hole penetrating the flange portion 71f in the up-down direction. As shown in FIG. 3, the relay portion support base 71 is fastened to the bottom wall 11a of the lower case 11 by a bolt 73 that is passed through a through hole of the flange portion 71f.
　パワー部３０の出力端子３６と中継バスバー５７とは、中継部支持台７１の端子支持部７１ａ上で締結される。図６に示すように、端子支持部７１ａの上面に、出力端子３６が配置される。出力端子３６の上面と中継部区画壁７１ｂの上面はほぼ同じ高さである。中継部支持台７１上に、３本の中継バスバー５７が配置される。 出力 The output terminal 36 of the power unit 30 and the relay bus bar 57 are fastened on the terminal support 71 a of the relay support 71. As shown in FIG. 6, the output terminal 36 is disposed on the upper surface of the terminal support 71a. The upper surface of the output terminal 36 and the upper surface of the relay section partition wall 71b are substantially at the same height. Three relay bus bars 57 are arranged on the relay support 71.
　平面視でＬ形の中継バスバー５７Ｕは、出力端子３６Ｕおよび中継部区画壁７１ｂの上面に配置される。中継バスバー５７Ｕの貫通孔に、位置決めピン７１ｄが通される。中継バスバー５７Ｕの側面は、第１位置決め壁７１ｃおよび第２位置決め壁７１ｅにより位置決めされる。ボルト７２が中継バスバー５７Ｕのボルト挿入孔に通され、出力端子３６Ｕのネジ穴に締め込まれることにより、中継バスバー５７Ｕと出力端子３６Ｕとがボルト締結される。 Ｌ The L-shaped relay bus bar 57U in plan view is arranged on the upper surface of the output terminal 36U and the relay section partition wall 71b. The positioning pins 71d are passed through the through holes of the relay bus bar 57U. The side surface of the relay bus bar 57U is positioned by the first positioning wall 71c and the second positioning wall 71e. The bolt 72 is passed through the bolt insertion hole of the relay bus bar 57U, and is screwed into the screw hole of the output terminal 36U, whereby the relay bus bar 57U and the output terminal 36U are bolted.
　中継バスバー５７Ｖは、出力端子３６Ｖおよび第１位置決め壁７１ｃ上に配置される。中継バスバー５７Ｖの貫通孔に、位置決めピン７１ｄが通される。中継バスバー５７ＶのＸ軸方向を向く２側面は、第２位置決め壁７１ｅにより位置決めされる。ボルト７２が中継バスバー５７Ｖのボルト挿入孔に通され、出力端子３６Ｖのネジ穴に締め込まれることにより、中継バスバー５７Ｖと出力端子３６Ｖとがボルト締結される。
　中継バスバー５７Ｗは、中継バスバー５７Ｕと同様に、出力端子３６Ｗおよび中継部区画壁７１ｂ上に位置決めされた状態で配置され、ボルト７２を用いて締結される。 The relay bus bar 57V is arranged on the output terminal 36V and the first positioning wall 71c. The positioning pin 71d is passed through the through hole of the relay bus bar 57V. The two side surfaces of the relay bus bar 57V facing the X-axis direction are positioned by the second positioning wall 71e. The bolt 72 is passed through the bolt insertion hole of the relay bus bar 57V and tightened into the screw hole of the output terminal 36V, so that the relay bus bar 57V and the output terminal 36V are bolted.
The relay bus bar 57W is arranged in a state of being positioned on the output terminal 36W and the relay section partition wall 71b, similarly to the relay bus bar 57U, and is fastened using the bolt 72.
　本実施形態のインバータユニット１では、中継部支持台７１を備えることで、出力端子３６と中継バスバー５７とを締結する際に、出力端子３６を下側から支持した状態でボルト７２を締め込むことができる。これにより、ボルト７２を締め込む際に、パワー部３０に対して曲げ応力がかかるのを抑えることができる。
　また、中継部支持台７１の第１位置決め壁７１ｃ、位置決めピン７１ｄおよび第２位置決め壁７１ｅにより中継バスバー５７が位置決めされる。これにより、中継接続部７０の組み立て作業が行いやすくなる。
　なお、中継部支持台７１と中継バスバー５７が一体化された部品を用いてもよい。この構成によれば、中継バスバー５７を外部接続バスバー５０へ取り付ける際の作業性が向上する。 In the inverter unit 1 of the present embodiment, when the output terminal 36 and the relay bus bar 57 are fastened, the bolt 72 is tightened while the output terminal 36 is supported from below by providing the relay portion support base 71. Can be. Thereby, when tightening the bolt 72, it is possible to suppress the bending stress from being applied to the power part 30.
Further, the relay bus bar 57 is positioned by the first positioning wall 71c, the positioning pin 71d, and the second positioning wall 71e of the relay portion support base 71. Thereby, the assembling work of the relay connection unit 70 is facilitated.
Note that a component in which the relay portion support base 71 and the relay bus bar 57 are integrated may be used. According to this configuration, workability when attaching the relay bus bar 57 to the external connection bus bar 50 is improved.
　中継バスバー５７Ｕ、５７Ｖ、５７Ｗは、バスバー接続部５５において、それぞれ外部接続バスバー５０Ｕ、５０Ｖ、５０Ｗと接続される。以下の説明では、外部接続バスバー５０Ｕ、５０Ｖ、５０Ｗを総称して外部接続バスバー５０と記載することがある。 The relay bus bars 57U, 57V, and 57W are connected to the external connection bus bars 50U, 50V, and 50W at the bus bar connection unit 55, respectively. In the following description, the external connection bus bars 50U, 50V, and 50W may be collectively referred to as the external connection bus bar 50.
　外部接続バスバー５０は、図４から図６に示すように、帯状の金属板である。外部接続バスバー５０Ｕ、５０Ｖ、５０Ｗは、いずれも上下方向に沿って延びる直線形状を有する。外部接続バスバー５０Ｕ、５０Ｖ、５０Ｗの先端部は、下側ケース１１の上端面１１ｃよりも上側に位置する。 The external connection bus bar 50 is a band-shaped metal plate as shown in FIGS. Each of the external connection bus bars 50U, 50V, 50W has a linear shape extending in the up-down direction. The distal ends of the external connection bus bars 50U, 50V, 50W are located above the upper end surface 11c of the lower case 11.
　外部接続バスバー５０は、図６に示すバスバーホルダ５２に保持される。本実施形態の場合、外部接続バスバー５０は、樹脂製のバスバーホルダ５２にインサート成形されている。バスバーホルダ５２は、３本の外部接続バスバー５０を保持する本体部５２ａと、本体部５２ａの上面から上側に延びる４本の区画壁５２ｂと、本体部５２ａの外周面の下端部から水平方向に広がるフランジ部５２ｃと、を有する。 The external connection bus bar 50 is held by a bus bar holder 52 shown in FIG. In the case of the present embodiment, the external connection bus bar 50 is insert-molded in a bus bar holder 52 made of resin. The bus bar holder 52 includes a main body 52a that holds three external connection bus bars 50, four partition walls 52b extending upward from the upper surface of the main body 52a, and a horizontal direction from a lower end of the outer peripheral surface of the main body 52a. An expanding flange portion 52c.
　外部接続バスバー５０Ｕ、５０Ｖ、５０Ｗは、各々の板面をパワー部３０側に向けられた状態で、下側ケース１１の短辺方向（Ｘ軸方向）に並んで配置される。外部接続バスバー５０Ｕ、５０Ｖ、５０Ｗは、それぞれが２つの区画壁５２ｂの間に位置する。区画壁５２ｂは、Ｘ軸方向に隣り合う外部接続バスバー５０同士を絶縁する。 The external connection bus bars 50U, 50V, and 50W are arranged side by side in the short side direction (X-axis direction) of the lower case 11 with their respective plate surfaces facing the power unit 30 side. Each of the external connection bus bars 50U, 50V, 50W is located between the two partition walls 52b. The partition wall 52b insulates the external connection bus bars 50 adjacent in the X-axis direction.
　バスバーホルダ５２は、図２および図３に示すように、下側ケース１１の底壁１１ａを上下方向に貫通するケース貫通孔１１ｅに、下側ケース１１の下面側から挿入される。バスバーホルダ５２は、フランジ部５２ｃの上面が下側ケース１１の下面に突き当てられることにより、上下方向に位置決めされる。バスバーホルダ５２は、フランジ部５２ｃの貫通孔に通されるボルトにより、下側ケース１１の底壁１１ａに締結される。この構成により、外部接続バスバー５０は、下側ケース１１の底壁１１ａを内外に貫通して配置される。 2) As shown in FIGS. 2 and 3, the busbar holder 52 is inserted from the lower surface side of the lower case 11 into a case through hole 11e vertically penetrating the bottom wall 11a of the lower case 11. The busbar holder 52 is positioned in the up-down direction by the upper surface of the flange 52c abutting against the lower surface of the lower case 11. The busbar holder 52 is fastened to the bottom wall 11a of the lower case 11 by a bolt passed through a through hole of the flange portion 52c. With this configuration, the external connection bus bar 50 is disposed so as to penetrate the bottom wall 11 a of the lower case 11 in and out.
　バスバーホルダ５２が下側ケース１１に固定された状態で、外部接続バスバー５０Ｕ、５０Ｖ、５０Ｗの上端部は、中継バスバー５７Ｕ、５７Ｖ、５７Ｗの上端部とほぼ同じ高さに配置される。中継バスバー５７Ｕと外部接続バスバー５０Ｕとは、互いの板面を重ね合わされた状態で、水平方向に延びるボルト５４により締結される。中継バスバー５７Ｖと外部接続バスバー５０Ｖ、中継バスバー５７Ｗと外部接続バスバー５０Ｗについても、互いの板面を重ね合わされた状態で、ボルト５４により締結される。
　すなわち、中継バスバー５７と外部接続バスバー５０とは、上下方向と交差する方向に延びるボルト５４を用いて締結される。 With the bus bar holder 52 fixed to the lower case 11, the upper ends of the external connection bus bars 50U, 50V, 50W are arranged at substantially the same height as the upper ends of the relay bus bars 57U, 57V, 57W. The relay bus bar 57U and the external connection bus bar 50U are fastened by bolts 54 extending in the horizontal direction in a state where the respective plate surfaces are overlapped. The relay bus bar 57V and the external connection bus bar 50V, and the relay bus bar 57W and the external connection bus bar 50W are also fastened with the bolts 54 in a state where the respective plate surfaces are overlapped.
That is, the relay bus bar 57 and the external connection bus bar 50 are fastened using the bolt 54 extending in a direction intersecting the vertical direction.
　ボルト５４による中継バスバー５７と外部接続バスバー５０との接続部が、インバータユニット１におけるバスバー接続部５５である。
　本実施形態では、図３および図５に示すように、バスバー接続部５５が、下側ケース１１の上端面１１ｃよりも上側に位置する。すなわち、カバー部材１２を取り外した状態で、バスバー接続部５５が下側ケース１１の収容室１３の外側に位置する。この構成によれば、中継バスバー５７と外部接続バスバー５０との接続作業において、下側ケース１１の側壁１１ｂが邪魔にならず、組み立て作業を効率よく実施できる。 A connection portion between the relay bus bar 57 and the external connection bus bar 50 by the bolt 54 is a bus bar connection portion 55 in the inverter unit 1.
In the present embodiment, as shown in FIGS. 3 and 5, the bus bar connection portion 55 is located above the upper end surface 11 c of the lower case 11. That is, with the cover member 12 removed, the bus bar connection portion 55 is located outside the accommodation room 13 of the lower case 11. According to this configuration, in the connection work between the relay bus bar 57 and the external connection bus bar 50, the side wall 11b of the lower case 11 does not interfere, and the assembling work can be performed efficiently.
　本実施形態では、バスバー接続部５５において、中継バスバー５７と外部接続バスバー５０とが、上下方向と交差する方向に延びるボルト５４を用いて締結される。バスバー接続部５５が下側ケース１１の上端面１１ｃよりも上側に位置するので、上下方向に対して横方向に延びるボルト５４による締結作業も容易に行うことができる。また、どのような向きのボルト締結であっても容易に締結できるので、インバータ筐体１０の内部において効率的に部品を配置できる。その結果、インバータユニット１の小型化も可能である。 In the present embodiment, in the bus bar connection portion 55, the relay bus bar 57 and the external connection bus bar 50 are fastened using bolts 54 extending in a direction intersecting the vertical direction. Since the bus bar connection portion 55 is located above the upper end surface 11c of the lower case 11, the fastening operation using the bolt 54 extending in the horizontal direction with respect to the vertical direction can be easily performed. In addition, since the bolt can be easily fastened in any direction, components can be efficiently arranged inside the inverter housing 10. As a result, the inverter unit 1 can be downsized.
　本実施形態では、バスバー接続部５５において、中継バスバー５７と外部接続バスバー５０とが、それぞれの板面を重ね合わされた状態で締結されるので、バスバー接続部５５の占有スペースを小さくできる。 In the present embodiment, in the bus bar connection portion 55, the relay bus bar 57 and the external connection bus bar 50 are fastened in a state where their respective board surfaces are overlapped, so that the occupied space of the bus bar connection portion 55 can be reduced.
　本実施形態のインバータユニット１は、パワー部３０と外部接続バスバー５０とを接続する中継バスバー５７を有する。中継バスバー５７を用いることで、パワー部３０の出力端子３６の位置を変更することなくバスバー接続部５５を下側ケース１１の上端面１１ｃよりも上側に配置できる。この構成によれば、中継バスバー５７の外部接続バスバー５０へのネジ止め作業が容易になる。 イ ン バ ー タ The inverter unit 1 of the present embodiment has a relay bus bar 57 that connects the power unit 30 and the external connection bus bar 50. By using the relay bus bar 57, the bus bar connection portion 55 can be disposed above the upper end surface 11c of the lower case 11 without changing the position of the output terminal 36 of the power unit 30. According to this configuration, the work of screwing the relay bus bar 57 to the external connection bus bar 50 becomes easy.
　上記実施形態では、中継バスバー５７を介してパワー部３０と外部接続バスバー５０とを接続する構成について説明したが、この構成に限られない。
　例えば、パワー部３０の出力端子３６Ｕ、３６Ｖ、３６Ｗを、半導体モジュール３２から上側に延びる形状としてもよい。この構成によれば、バスバー接続部５５において、中継バスバー５７を用いることなく、パワー部３０と外部接続バスバー５０とを直接接続できる。この場合にも、下側ケース１１の上端面１１ｃよりも上側に位置するバスバー接続部５５において、水平方向に延びるボルト５４によりパワー部３０と外部接続バスバー５０とを締結することで、インバータユニット１を容易に組み立て可能である。 In the above embodiment, the configuration in which the power unit 30 and the external connection bus bar 50 are connected via the relay bus bar 57 has been described, but the present invention is not limited to this configuration.
For example, the output terminals 36U, 36V, and 36W of the power unit 30 may have a shape extending upward from the semiconductor module 32. According to this configuration, the power unit 30 and the external connection bus bar 50 can be directly connected in the bus bar connection unit 55 without using the relay bus bar 57. Also in this case, the power unit 30 and the external connection bus bar 50 are fastened by the bolts 54 extending in the horizontal direction at the bus bar connection portion 55 located above the upper end surface 11c of the lower case 11, so that the inverter unit 1 Can be easily assembled.
　また上記実施形態では、外部接続バスバー５０は底壁１１ａを内外に貫通して配置される構成としたが、外部接続バスバー５０は側壁１１ｂを内外に貫通して配置されていてもよい。この場合にも、バスバー接続部５５が下側ケース１１の上端面１１ｃよりも上側に配置されることによる作業性向上効果が得られる。 In the above embodiment, the external connection bus bar 50 is arranged to penetrate the bottom wall 11a in and out, but the external connection bus bar 50 may be arranged to penetrate the side wall 11b in and out. Also in this case, the workability improvement effect can be obtained by arranging the bus bar connection portion 55 above the upper end surface 11c of the lower case 11.
　図３に示すように、バスバー接続部５５に、中継バスバー５７と外部接続バスバー５０との締結部を覆う保護カバー５５ａが配置されていてもよい。保護カバー５５ａは、頂壁を有する角筒状の絶縁部材である。保護カバー５５ａは、ボルト５４による締結部の上側および側面を覆う。保護カバー５５ａが設けられていることで、バスバー接続部５５とカバー部材１２とを絶縁できる。 As shown in FIG. 3, a protective cover 55 a that covers a fastening portion between the relay bus bar 57 and the external connection bus bar 50 may be arranged in the bus bar connection portion 55. The protection cover 55a is a rectangular tubular insulating member having a top wall. The protection cover 55a covers the upper side and the side surface of the fastening part by the bolt 54. By providing the protective cover 55a, the bus bar connection part 55 and the cover member 12 can be insulated.
　１…インバータユニット、２…モータ、３…モータユニット、１０…インバータ筐体、１１…下側ケース、１１ａ…底壁、１１ｂ，１２ｂ…側壁、１１ｃ…上端面、３０…パワー部、３６，３６Ｕ，３６Ｖ，３６Ｗ…出力端子、５０，５０Ｕ，５０Ｖ，５０Ｗ…外部接続バスバー、５２ｂ…区画壁、５４，７２，７３…ボルト、５５…バスバー接続部、５７，５７Ｕ，５７Ｖ，５７Ｗ…中継バスバー、７０…中継接続部、７１…中継部支持台、７１ａ…端子支持部、７１ｂ…中継部区画壁 DESCRIPTION OF SYMBOLS 1 ... Inverter unit, 2 ... Motor, 3 ... Motor unit, 10 ... Inverter housing, 11 ... Lower case, 11a ... Bottom wall, 11b, 12b ... Side wall, 11c ... Top surface, 30 ... Power part, 36, 36U , 36V, 36W: output terminal, 50, 50U, 50V, 50W: external connection bus bar, 52b: partition wall, 54, 72, 73: bolt, 55: bus bar connection portion, 57, 57U, 57V, 57W: relay bus bar, 70 ... relay connection part, 71 ... relay part support base, 71a ... terminal support part, 71b ... relay part partition wall

Claims (8)

  1. 　モータに取り付け可能なインバータユニットであって、
    　インバータ回路を含むパワー部と、前記パワー部を収容するインバータ筐体と、前記パワー部に電気的に接続される外部接続バスバー、とを備え、
    　前記インバータ筐体は、底壁と、前記底壁の周縁から上側に延びる筒状の側壁とを有する下側ケースを有し、
    　前記外部接続バスバーは、前記下側ケースの前記底壁または前記側壁を内外に貫通して配置され、
    　前記パワー部と前記外部接続バスバーとは、前記下側ケースの前記側壁の上端面よりも上側に位置するバスバー接続部において接続される、
    　インバータユニット。     An inverter unit that can be attached to the motor,
    A power unit including an inverter circuit, an inverter housing that houses the power unit, and an external connection bus bar electrically connected to the power unit,
    The inverter housing includes a lower case having a bottom wall and a cylindrical side wall extending upward from a peripheral edge of the bottom wall,
    The external connection bus bar is disposed so as to penetrate the bottom wall or the side wall of the lower case in and out.
    The power unit and the external connection bus bar are connected at a bus bar connection unit located above an upper end surface of the side wall of the lower case.
    Inverter unit.
  2. 　前記バスバー接続部において、前記パワー部と前記外部接続バスバーとは、上下方向と交差する方向に延びるボルトを用いて締結される、
    　請求項１に記載のインバータユニット。     In the bus bar connection portion, the power portion and the external connection bus bar are fastened using a bolt extending in a direction intersecting the vertical direction.
    The inverter unit according to claim 1.
  3. 　前記パワー部と前記外部接続バスバーとを接続する中継バスバーを有する、
    　請求項１または２に記載のインバータユニット。     Having a relay bus bar for connecting the power unit and the external connection bus bar,
    The inverter unit according to claim 1.
  4. 　前記外部接続バスバーおよび前記中継バスバーは、いずれも帯状の金属板であり、
    　前記バスバー接続部において、前記中継バスバーと前記外部接続バスバーとは、互いの板面を重ね合わされた状態でボルト締結される、
    　請求項３に記載のインバータユニット。     The external connection bus bar and the relay bus bar are both band-shaped metal plates,
    In the bus bar connection portion, the relay bus bar and the external connection bus bar are bolted together in a state where their plate surfaces are overlapped with each other,
    The inverter unit according to claim 3.
  5. 　前記パワー部の出力端子と前記中継バスバーとを接続する中継接続部を有し、
    　前記中継接続部は、
    　　前記パワー部の出力端子と前記中継バスバーとを下側から支持する中継部支持台と、
    　　前記パワー部の出力端子と前記中継バスバーとを接続する中継部固定部材と、
    　を有する、
    　請求項３または４に記載のインバータユニット。     A relay connection unit that connects the output terminal of the power unit and the relay bus bar,
    The relay connection unit,
    A relay unit supporter that supports the output terminal of the power unit and the relay bus bar from below,
    A relay section fixing member that connects the output terminal of the power section and the relay bus bar,
    Having,
    The inverter unit according to claim 3.
  6. 　前記中継部固定部材は、前記中継バスバーを上下方向に貫通し、前記パワー部の出力端子に設けられるネジ穴に締め込まれるボルトである、
    　請求項５に記載のインバータユニット。     The relay portion fixing member is a bolt that vertically penetrates the relay bus bar and is screwed into a screw hole provided in an output terminal of the power unit.
    The inverter unit according to claim 5.
  7. 　複数の前記中継バスバーを有し、前記パワー部は複数の前記出力端子を有しており、
    　前記中継部支持台は、前記パワー部の出力端子と前記中継バスバーとが固定される端子支持部を複数有し、
    　前記複数の端子支持部は、上下方向と交差する方向に並んで配置され、
    　隣り合う前記端子支持部の間には、上下方向に延びる中継部区画壁が位置する、
    　請求項５または６に記載のインバータユニット。     It has a plurality of the relay bus bars, the power unit has a plurality of the output terminals,
    The relay unit support has a plurality of terminal support units to which the output terminal of the power unit and the relay bus bar are fixed,
    The plurality of terminal support portions are arranged side by side in a direction intersecting the vertical direction,
    A relay section partition wall extending vertically is located between the adjacent terminal support sections,
    The inverter unit according to claim 5.
  8. 　請求項１から７のいずれか１項に記載のインバータユニットと、
    　前記インバータユニットから交流電流を供給される前記モータと、
    　を備える、モータユニット。     An inverter unit according to any one of claims 1 to 7, and
    The motor supplied with an alternating current from the inverter unit,
    A motor unit comprising:
PCT/JP2019/032976 2018-08-24 2019-08-23 Inverter unit and motor unit WO2020040279A1 (en)

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JP2007195292A (en) * 2006-01-17 2007-08-02 Hitachi Ltd Power converter
JP2011223775A (en) * 2010-04-12 2011-11-04 Toyota Industries Corp Electric apparatus
JP2015119036A (en) * 2013-12-18 2015-06-25 トヨタ自動車株式会社 Electronic device with cooling function

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JP2007195292A (en) * 2006-01-17 2007-08-02 Hitachi Ltd Power converter
JP2011223775A (en) * 2010-04-12 2011-11-04 Toyota Industries Corp Electric apparatus
JP2015119036A (en) * 2013-12-18 2015-06-25 トヨタ自動車株式会社 Electronic device with cooling function

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JP7151923B1 (en) 2022-04-25 2022-10-12 富士電機株式会社 power converter
JP2023161497A (en) * 2022-04-25 2023-11-07 富士電機株式会社 Power conversion device

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