| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent common-mode voltage from enlarging to such a degree as to magnetically saturate a common-mode choke coil. <P>SOLUTION: For a PWM rectifier circuit 6, the switching frequency of a PWM rectifying circuit 2 is set to be approximately three times the switching frequency of a PWM inverter 4 by a PWM inverter controller 7. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
