| 摘要 |
PURPOSE:To convert phase voltages directly into high frequency without the intermediary of a full-wave rectifier by inverting and producing the high frequency conversion output by pi/3 for one phase and synthesizing the high frequency outputs of the respective phases. CONSTITUTION:The inverter output of a series inverter block 2 is matched to the time constant which is determined by the time constant of a transformer 9 and a condenser 10, and when switches 7, 8 are switched in high frequency, high frequency AC output can be obtained. In case that the switch 7 is opened and the switch 8 is closed in the block 2 when the switch 7 of inverter blocks 3, 4 is closed and the switch 8 is opened during pi/3 of the phase angle, the voltages which are induced in the secondary coils of a transformer of each inverter become the same polarity. When the outputs of the inverters are produced as the sum of the absolute values, the high frequency output of substantially constant level can be obtained. |
