DRIVE DEVICE

To provide a drive device that achieves both heat dissipation of a switching element and slidability of a rotating shaft while integrating a power conversion circuit into a motor.SOLUTION: A driving device includes a motor 80, a housing 830, a board 30, a power conversion circuit, a rear frame end 837 (heat radiating member), a gel G (heat conduction deformer), and a mounting component R. The heat radiating member is arranged on the side surface (one surface) on which switching elements 123 and 223 (MOS) are mounted with respect to the substrate 30, and releases the heat generated by the MOS. The gel G is plastically deformed so as to be in close contact with the MOS and the heat radiating member, and heat is conducted from the MOS to the heat radiating member. The mounting component R is a component mounted on one surface of the substrate 30, and is arranged between an opening facing region A1 and the MOS when viewed from the plate surface vertical direction of the substrate 30.SELECTED DRAWING: Figure 8 【課題】電力変換回路のモータへの一体化を図りつつも、スイッチング素子の放熱性と回転軸の摺動性の両立を図った駆動装置を提供する。【解決手段】駆動装置は、モータ８０と、ハウジング８３０と、基板３０と、電力変換回路と、リアフレームエンド８３７（放熱部材）と、ゲルＧ（熱伝導変形体）と、実装部品Ｒと、を備える。放熱部材は、基板３０に対してスイッチング素子１２３、２２３（ＭＯＳ）が実装される側の面（一面）に配置され、ＭＯＳで生じた熱を放出する。ゲルＧは、ＭＯＳおよび放熱部材に密着するように塑性変形して、ＭＯＳから放熱部材へ熱伝導させる。実装部品Ｒは、基板３０の一面に実装された部品であって、基板３０の板面垂直方向から見て、開口対向領域Ａ１とＭＯＳとの間に配置されている。【選択図】図８