| 摘要 |
In one embodiment, the high frequency-high voltage power module includes an output transformer having a first primary winding and a first secondary winding and a second transformer, that is saturable, having a second primary winding and a second secondary winding. The AC power applied to the power module is converted to a substantially direct current by a diode, a capacitor and a thermistor. A center tap on the first primary winding is connected to the positive side of the capacitor. Either end of the first primary winding of the output transformer is connected to a respective end of the second primary winding of the second transformer via a respective resistor. The center tap on the second secondary winding is connected via an RC circuit to the negative side of the capacitor. A pair of switching transistors operates in a balanced push-pull relationship and is switched by the current flowing through the divided windings of the second secondary winding. The collector/emitter of a respective transistor is parallel to a feedback resistor, common to both transistors, to the converting capacitor and to one segment of the first primary winding. When the second transformer saturates, the voltages across the primary and secondary windings fall to zero, thereby switching an alternate one of the pair of transistors to an OFF state.
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