DRIVING DEVICE

摘要

A driving device with a constitution which is compact as the whole device and by which the thermal load on a capacitor is reduced. A driving device (1) comprises an inverter (4), a capacitor (5) for smoothing the power supply voltage of the inverter (4), and a case (2) for housing a rotating electrical machine (MG1). In the case (2), a controller housing space (R2) including an inverter housing space portion (Ri) for housing the inverter (4) and a capacitor housing space portion (Rc) for housing the capacitor (5) is formed outside the rotating electrical machine (MG1) in the radial direction of the shaft center of the rotating electric machine (MG1), and a refrigerant flowing chamber (6) through which a refrigerant flows is formed between the controller housing space (R2) and the rotating electric machine (MG1). A heat exchanging fin (23) for the capacitor for performing heat exchange between the capacitor housing space portion (Rc) and the refrigerant is provided between the capacitor housing space portion (Rc) and the refrigerant flowing chamber (6).