Electric power conversion systems – Current conversion – Including automatic or integral protection means
Patent
1994-08-30
1995-05-23
Dougherty, Thomas M.
Electric power conversion systems
Current conversion
Including automatic or integral protection means
315411, H02H 7122
Patent
active
054187052
ABSTRACT:
A first resonant retrace circuit is operable for generating a first voltage signal and a second resonant retrace circuit coupled to the first resonant retrace circuit is operable for generating a second voltage signal summed with the first voltage signal. An auxiliary winding of a flyback transformer in the first resonant retrace circuit generates a first feedback pulse signal representative of the first voltage signal. A regulator senses the summed first and second voltage signals and generates a second feedback pulse signal representative of the summed first and second voltage signals. The second resonant retrace means is responsive to the regulator. A resistive summing junction combines the first and second feedback pulse signals to generate a composite feedback pulse signal. A voltage level is generated indicative of the energy in the composite feedback pulse signal. An overvoltage protection circuit is responsive to the voltage level for disabling operation of at least one of the first and second resonant retrace circuits.
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Smith Lawrence E.
Williams Kevin M.
Dougherty Thomas M.
Fried Harvey D.
Laks Joseph J.
Nguyen Matthew V.
Thomson Consumer Electronics Inc.
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