| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a chopper type inverter circuit by which bidirectional currents are controlled with a low loss and a voltage applied to a load is changed, and which is preferable as a bidirectional boosting type inverter. <P>SOLUTION: The phase voltage of a sine wave voltage amplitude is generated while a phase chopper circuit portion 1 of one phase is boosted and operated, then the phase voltages of the sine wave voltage amplitudes are generated while phase chopper circuit portions 2, 3 of other phases are stepped down and operated. Phases of the phase voltages of each phase chopper circuit 1 to 3 are made different each other, by which each of the phase chopper circuits 1 to 3 outputs the sine wave AC phase voltage in which a DC voltage is superimposed, and sine wave AC interphase voltages are applied between lines of an AC three-phase AC motor 7. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
