| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress wave distortion due to the imbalance of power voltage by simple operation and to reduce the cost, in an AC/DC/AC system of power converter, where the filter of a DC link part is removed, or in a matrix converter. <P>SOLUTION: A PWM rectifier control means 101A is equipped with: a power voltage/potential detection means 10; a voltage vector converting means 11 which computes the magnitude of a power voltage vector; a maximum/minimum detection means 12 which detects the maximum value and the minimum value of the magnitude of a voltage vector; a means 13 which makes an input current command for making instantaneous active power roughly constant, using the phase of the positive phase/reverse phase voltage determined from the power phase when the magnitude of the voltage vector becomes its maximum value or its minimum value or both of them, the magnitude of the positive phase/reverse phase voltage determined from the maximum value and the minimum value of the magnitude of the voltage vector, and the magnitude of a positive phase/reverse phase current command; and a means 14 which makes a PWM signal, according to this input current command. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
