| 摘要 |
A method of charging a traction battery, in particular of a motor vehicle, from an external AC power supply system, in particular a three-phase power supply system. The traction battery to be charged is coupled, via an inverter, to an electric alternating-field machine in such manner that the AC power supply can be connected to the phase windings of the alternating-field machine. During a first step, the rotational speed of the alternating-field machine is synchronized with the frequency of the AC power supply, and during a second step, the AC power supply is connected to the phase windings of the alternating-field machine and the inverter, electrically coupled to the alternating-field machine, is operated as a step-up converter.
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