Patent ID: 7327123
Filing Date: 2008-02-05
Classification: H02K,H02M,H02P

Abstract:
1. A system, responsive to at least one phase of an AC signal, for generating control signals to a switching rectifier to generate a regulated DC signal, the system comprising: a zero crossing detector, responsive to a first signal representative of the AC phase, for generating indicia of zero crossings in the AC phase; a variable ramp generator, responsive to a second signal representative of the AC phase and the indicia of zero crossings, for generating a ramp signal indicative of the time integral of the voltage of the AC phase accumulated from the occurrence of a zero crossing and reset upon the occurrence of the next successive zero crossing; a trigger signal generator, responsive to the time integral ramp signal and a reference signal indicative of a desired firing angle to maintain a set DC output, for generating the control signals to the switching rectifier in accordance with a comparison of the time integral ramp signal to the reference signal.