| 摘要 |
A regulated power supply of the driven power inverter type. The widths of the driver pulses are controlled by a modulation waveform which varies in accordance with variations in the regulated output from the reference potential. The driver transistors are simultaneously turned on during the dwell periods of the modulation waveform to dissipate current in the windings of the interstage transformer and switch off the power transistors. The transformer is a current transformer which includes positive feedback windings on the secondary side. The turns ratio of the positive feedback winding and the secondary current winding associated with each power transistor is set equal to the inverse current gain of the transistor to ensure a fixed gain when the transistor is in saturation. A regulated low current voltage is applied to the midpoint of the primary side of the transformer to provide low power switching of the power transistors. A transistor switch connected from the regulator output to the primary side of the transformer removes the driver pulses from the inverter in the event of a component failure. |
