| 摘要 |
<p>A transformer coupling type booster, wherein ON/OFF switching signals are applied to each of the switching devices; and a switching control is conducted, where a voltage-polarity plus period in which the voltage between both terminals of the low-voltage side winding and the voltage between both terminals of the high-voltage side winding become plus polarity, and a voltage-polarity minus period in which those voltages become minus polarity, are repeated alternately at a prescribed cycle. Upon conducting the above-mentioned control, a control will be added to provide, between the voltage-polarity plus period in which the voltage between both terminals of the low-voltage side winding and the voltage between both terminals of the high-voltage side winding are plus polarity, and the voltage-polarity minus period of the same, a period in which those voltages will become zero, to lower the effective current value of the transformer. In this case, a period will be formed between the voltage-polarity plus period, in which the voltage between both terminals of the low-voltage side winding and the voltage between both terminals of the high-voltage side winding are plus polarity, and the voltage-polarity minus period of the same, in which those voltages will become zero, by providing a phase difference between each of the switching signals to be applied to each of the switching devices of the low-voltage side inverter, and by providing a phase difference between each of the switching signals to be applied to each of the switching devices of the high-voltage side inverter.</p> |
