| 摘要 |
A polyphase input DC power source apparatus for converting an AC power from a polyphase AC power source formed of star-connected secondary windings into a DC power of both positive and negative outputs includes a polyphase chopper circuit connected to each phase of the polyphase AC power source and formed of a reactor excited upon application of a voltage and a switching element for chopping a current flowing in the reactor, a polyphase rectifying circuit for rectifying an output from the polyphase chopper circuit, a capacitor, connected in parallel to a load, for accumulating an output from the polyphase rectifying circuit, connected in parallel to a load, and a controller for monitoring a voltage and current of the AC power source and a voltage applied to the load to control the switching element such that a current flowing in each phase of the polyphase AC power source is proportional to a voltage of each phase.
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