| 摘要 |
A drive unit which uses an electric motor as a power source and has an integrated inverter, with a cooling circuit for the electric motor and the inverter. The drive unit includes a drive unit case, the electric motor housed within the case, and the inverter fixed to the case. A coolant flow passage is provided between the drive unit case and the inverter. The inverter is fixed to the drive unit case through a panel wall, and a partition divides the coolant flow passage into chambers which are coextensive in parallel. As a result, the coolant which flows through the coolant flow passage acts as a two-stage heat shield, barring the heat generated by the electric motor from being transmitted to the inverter.
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