| 摘要 |
PROBLEM TO BE SOLVED: To reduce a mechanical energy of rotation to the minimum value by generating a control signal for a switching device of an inverter circuit with a control device and then controlling the switching device to conductive and non-conductive condition. SOLUTION: The switching devices S732 and S734 become conductive selectively with the exclusive base responding to respective drive signals DS732 and DS734 from an inverter control device 760. When the switching device S732 is in the conductive condition, the switching device S734 is in the non- conductive condition and opposite condition. Therefore, the switching devices S732, S734 generate the adequately pulse width modulated waveform in the output connecting point J723 in relation to the connecting point J722. The output signal existing over the connecting points J723 and J722 is applied to a filter F717. In this case, selection is performed to generate ACLINE2 identical to ACLINE1. |
