| 摘要 |
PURPOSE:To enable a steel core of an insulation transformer to be reduced in size, by connecting an AC output of No. 1 power inverter to the insulation transformer and further providing No. 2 power inverter connected to secondary winding of the insulation transformer. CONSTITUTION:By generating clock pulse by an oscillator 15 and controlling pulse widths of output voltages of all the power inverters 51 through 54 by ON pulse synchronized with this clock pulse and OFF pulse generated from an OFF pulse generator 16, operation control is conducted so that sine wave current reference wave and armature winding become equal to each other. By controlling a period of electrification between ON pulse and OFF pulse, output voltage of all the power inverters 51 through 54 are controlled, and thereby, current control is conducted. |
