{'fraction_non_alphanumeric': 0.02491408934707904, 'fraction_numerical': 0.0, 'mean_word_length': 5.036269430051814, '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 Common-Mode Voltage Reduction Modulation for a Phase-Shift DC-DC Converter

A common-mode (CM) voltage reduction modulation for a three-level full bridge phase-shift DC-DC converter is proposed in this paper. With conventional modulation, the three-level full bridge phase-shift DC-DC converter generates considerable CM voltage. The CM voltage is undesired because it causes CM current noise and deteriorate EMI performance. To solve this problem, methods including bulky EMI filter or additional cancellation circuits are usually used. However, it increases system cost, and reduces efficiency. The proposed modulation method can reduce the CM voltage close to zero and reduce the CM current substantially. The method does not require any additional circuit. The size of EMI filter could also be reduced due to the reduced CM voltage and current. Compared with conventional methods, the proposed CM voltage reduction method has the benefits of effective, low cost and high efficiency. The principle of the proposed modulation method is presented in this paper. The correctness and effectiveness of the method is verified by simulation and experimental results.