by aderolee on Fri May 14, 2010 3:26 am
The 12V powers a high frequency power oscillator that drives a small high frequency ferrite transformer. The high frequency high voltage output of the transformer is rectified and filtered which produces 340VDC that powers the PWM modulated Mosfets. The modulation is the 50Hz or 60Hz sine-wave that has the high frequency steps removed by an LC filter.
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