| 摘要 |
PROBLEM TO BE SOLVED: To provide a three-phase rectifier device capable of reducing power source harmonics and controlling a power source power factor to be 1. SOLUTION: The device is provided with a three-phase rectifying circuit 2 having diodes D1-D12 and switching elements Q1-Q6, rectifying AC power of three-phase AC reactors La-Lc and outputting the rectified power to smoothing capacitors C1, C2; a coordinate converter 34 for converting a first coordinate current of the three-phase AC power source into a second coordinate current on the basis on the power source voltage phase calculated in a phase calculator 33 based on the voltage of the three-phase AC power source; PI controllers 40, 36 for generating a second coordinate system voltage command value on the basis of an effective branched current command value generated in a PI controller 38 on the basis of a smooth capacitor voltage and a reference voltage value, and a predetermined invalid branched current command value and a second system current; and a spatial voltage vector modulation calculating section 42 for calculating a voltage vector to be selected on the basis of the first coordinate system voltage command value obtained by converting the second coordinate system voltage command value by a coordinate converter 41 on the basis of the power source voltage phase and the smoothing capacitor voltage, calculating a switching pattern having an order of the least number of times of switching of each switching element, and generating a command signal to each switching element. COPYRIGHT: (C)2008,JPO&INPIT
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