| 摘要 |
This invention provides a power unit for an automobile including a motor 6 for starting an engine by transmitting a power thereto and generating a power by receiving a power from the engine during rotation thereof, a power converting circuit 5 for transmitting a power to the motor 6 , a battery 1 , an energy storing source 20 for storing energy, and a DC/DC converter including at least two switching elements 10, 11 , charging the energy storing source 20 , and recovering energy in the energy storing source 20 to the battery 1 . Since the switch provided in the DC/DC converter is normally turned on when the motor 6 generates power by receiving a power from the engine and charges the battery 1 through the power converting circuit 5 and the DC/DC converter, generation of heat from the DC/DC converter circuit part can be suppressed greatly.
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