Multiple-mode voltage converter

Details Multiple-mode voltage converter Multiple-mode voltage converter

1988-02-26

1990-07-31

Salce, Patrick R.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

363 17, 363 98, 363134, H02M 75387

Patent

active

049454676

ABSTRACT:
A voltage converter (100) converts a high voltage, low frequency input to a low D.C. voltage output. The input is rectified to facilitate the operation of an oscillator (202) which operates alternately a pair of MOSFETS (124 and 126).
Upon operation of MOSFET (124), the intermediate D.C. voltage is applied across and directs current in one direction through a primary winding (132) of a high frequency step-down transformer (134) and also charges a series-connected capacitor (152). Upon operation of MOSFET (126), capacitor (152) discharges to provide current through primary winding (132) in the opposite direction. In this manner, an alternating voltage at a high frequency is stepped down to a secondary winding (142) of transformer (134) and is rectified to provide the low D.C. voltage output.
Diodes (120 and 122) prevent undesirable oscillations within voltage converter (100) if a short should occur in any load connected to the output of the converter.

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