PROBLEM TO BE SOLVED: To provide a novel electric driving device and a novel electric power steering device that can shorten the lengths thereof in the axial direction as much as possible and dissipate the heat of a power supply circuit part and a power conversion circuit part to the outside efficiently.SOLUTION: A heat dissipation part 15A on the side of a switching circuit for power conversion and a heat dissipation part 15B on the side of a power supply circuit are provided on the end surface part 15 of a motor housing on the opposite side of the output shaft 14 of the revolving shaft of an electric motor. A switching circuit board for power conversion, which is equipped with a switching circuit part 16 for power conversion packaged with an upper-arm-side switching element and a lower-arm-side switching element that constitute a power conversion circuit part, is mounted on the heat dissipation part 15A on the side of the switching circuit for power conversion so that heat can be dissipated. A power supply circuit board, which is equipped with the power conversion circuit part and a power supply circuit part 17 except for the upper-arm-side switching element and the lower-arm-side switching element, is mounted on the heat dissipation part 15B on the side of the power supply circuit so that heat can be dissipated.SELECTED DRAWING: Figure 6
【課題】軸方向の長さをできるだけ短くすると共に、電源回路部や電力変換回路部の熱を効率よく外部に放熱することができる新規な電動駆動装置及び電動パワーステアリング装置を提供することにある。【解決手段】電動モータの回転軸の出力軸部14とは反対側のモータハウジングの端面部15に電力変換用スイッチング回路側放熱部15A及び電源回路側放熱部15Bを形成し、電力変換用スイッチング回路側放熱部15Aに、電力変換回路部を構成する上アーム側スイッチング素子及び下アーム側スイッチング素子をパッケージ化した電力変換用スイッチング回路部16を実装した電力変換用スイッチング回路基板を放熱可能に取り付け、電源回路側放熱部15Bに、上アーム側スイッチング素子及び下アーム側スイッチング素子を除く電力変換回路部と電源回路部17を実装した電源回路基板を放熱可能に取り付けた。【選択図】図6
ELECTRIC DRIVING DEVICE AND ELECTRIC POWER STEERING DEVICE
電動駆動装置及び電動パワーステアリング装置
2018-05-24
Patent
Electronic Resource
Japanese
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