To provide an electric driving device in novel configuration capable of sufficiently radiating head of circuit boards that are disposed while being stacked, and an electrically-driven power steering device.SOLUTION: Multiple circuit boards are disposed while being stacked on a side end wall of a motor housing at a side opposite to an output part of a rotary shaft of an electric motor. A radiation member thermally connecting one face of at least one circuit board other than a fitting and fixing part of the circuit board and a metal cover which covers the circuit board is disposed between the one surface of the circuit board and the metal cover. The one surface of the circuit board other than the fitting and fixing part of the circuit board and the metal cover are thermally connected by the radiation member, thereby sufficiently radiating heat that is generated from a transistor. Therefore, an electronic circuit element that is easily influenced by heat can be prevented from being influenced by heat.SELECTED DRAWING: Figure 10
【課題】積層して配置された回路基板の熱を充分に放熱することができる新規な構成の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部とは反対側のモータハウジングの側端壁に複数の回路基板を積層して配置する共に、少なくとも1つの回路基板の取付固定部以外の回路基板の一面と回路基板を覆う金属カバーとを熱的に接続する放熱部材を、回路基板の一面と金属カバーの間に配置した。回路基板の取付固定部以外の回路基板の一面と金属カバーとを放熱部材によって熱的に接続したので、トランジスタから発生した熱を充分に放熱することができ、熱の影響を受け易い電子回路素子が熱の影響を受けるのを抑制することができるようになる。【選択図】図10
ELECTRICALLY 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
2019-01-10
Patent
Electronic Resource
Japanese
ELECTRICALLY-DRIVEN DRIVING DEVICE AND ELECTRICALLY-DRIVEN POWER STEERING DEVICE
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