| 摘要 |
PROBLEM TO BE SOLVED: To restrain an induced voltage in a three-phase switch rectifier.SOLUTION: A three-phase switch rectifier converts three-phase alternating-current power inputted from a three-phase alternating-current power source into direct-current power, and outputs it to an apparatus. The three-phase switch rectifier comprises: a full wave rectification circuit for rectifying the three-phase alternating-current power into the direct-current power; a bidirectional switch circuit having plural switching elements turning on/off supply in each phase from the three-phase alternating-current power source to the full wave rectification circuit; a capacitor connected between an output terminal of the three-phase switch rectifier and the full wave rectification circuit; and control means for detecting a voltage of each phase of the three-phase alternating-current power source, generating a switching pattern of each phase for turning on/off the bidirectional switch circuit on the basis of a detected voltage of each phase, and switching-controlling the bidirectional switch circuit on the basis of the generated switching pattern. The control means turns on all of the plural switching elements during starting the three-phase switch rectifier. |
