{'fraction_non_alphanumeric': 0.012, 'fraction_numerical': 0.0, 'mean_word_length': 5.103658536585366, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
A Full Bridge Resonant Inverter with Modified Phase Shift Modulation

A full bridge resonant inverter is proposed as one of the potential building blocks for high frequency ac distributed power supply. Because the load impedance in ac distributed power system is unknown and the input line voltage has wide range of variation, voltage feedback and feed-forward control has to be applied to regulate the output voltage. However with the conventional phase shift modulation (PSM), the phase angle of the inverter output voltage shifts with the line and load perturbation. A modified symmetrical PSM is proposed where triangle waveform is used as carrier signal and the modulation signal is double edge modulated. With this method, the phase angle of the output voltage is independent of the line and load variation. The mechanism is described and analyzed. Performance during steady state and transient shows that the symmetrical PSM inverter is applicable to high frequency ac distributed power system