| 摘要 |
In one aspect of the invention, an isolated power converter suitable for high power and high voltage applications comprises stacked rectifiers and lossless snubber circuits with inductors that prevent snubber diodes from delivering large current pulses into output filter capacitors when the duty cycle of the inverter is low, thereby allowing effective snubbing without unduly restricting the voltage conversion range of the power supply. In another aspect of the invention, control circuitry of a power supply comprises both a high bandwidth input current regulator and a low bandwidth output voltage regulator. The combination of a wide bandwidth input current regulator and a low bandwidth output voltage regulator allows the power supply to emulate an inductively loaded uncontrolled rectifier while restricting negative input impedance characteristics to frequencies that are substantially lower than the frequency of the ac power system.
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