To provide a new electrically-driven driving device and electrically-driven power steering device, capable of suppressing internal pressure fluctuation in a housing space for an electronic control unit and efficiently releasing heat generated in the electronic control unit to the outside.SOLUTION: There are provided air circulation passages 38A, 38B for connecting a housing space Sp for an electronic control unit with the outside to buffer internal pressure fluctuation by circulating air. Parts on the housing space side of the air circulation passages 38A, 38B are made to be a divided air circulation passage 41 divided into a plurality passages. A cooling target member 16 is disposed so as to come into thermal contact with air flowing in the divided air circulation passage 41. The gross-sectional area of the divided air circulation passage 41 is smaller than sectional area of parts of the air circulation passages 38A, 38B that are not divided. Because the housing space for the electronic control unit is connected with the outside by the air circulation passages, internal pressure fluctuation can be buffered. By making a flow rate of air flowing in the divided air circulation passage on the housing space side of the air circulation passages higher, heat in the housing space can be efficiently released to the outside.SELECTED DRAWING: Figure 10
【課題】電子制御部の収納空間の内圧変動を抑制すると共に、電子制御部で発生した熱を効率良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。【解決手段】電子制御部の収納空間Spと外部を接続して空気を流通させて内圧変動を緩衝する空気流通通路38A、38Bを設け、空気流通通路38A、38Bの収納空間側を複数の通路に分割された分割空気流通通路41とし、この分割空気流通通路41を流れる空気と熱的に接触するように冷却対象部材16を配置すると共に、分割空気流通通路41の総断面積を分割されていない空気流通通路38A、38Bの断面積より小さくした。空気流通通路によって電子制御部の収納空間と外部を接続しているので内圧変動を緩衝でき、更に空気流通通路の収納空間側の分割空気流通通路を流れる空気の流速を速くして収納空間内の熱を効率良く外部に放熱することができる。【選択図】図10
ELECTRICALLY-DRIVEN DRIVING DEVICE AND ELECTRICALLY-DRIVEN POWER STEERING DEVICE
電動駆動装置及び電動パワーステアリング装置
2020-08-31
Patent
Elektronische Ressource
Japanisch
ELECTRICALLY-DRIVEN DRIVING DEVICE AND ELECTRICALLY-DRIVEN POWER STEERING DEVICE
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