| Abstract |
This paper shows modified PWM algorithm for control of the series resonant converter working withthe low duty cycle in comparison with standard PWM. Proposed algorithm is used in combinationwith standard PWM to achieve lowest switching losses in whole output voltage range. The standardalgorithm uses basic pulse-width modulation with pulses centered to the waveforms of current. That isdisadvantageous, when the low output voltage is needed (low duty cycle). The proposed PWMalgorithm uses two pulses, instead of one, in one half of period. The first pulse starts in instant, whenthe current crosses zero and the second pulse ends in time, when the current also crosses zero asshown in the paper. |
