{'fraction_non_alphanumeric': 0.021121039805036556, 'fraction_numerical': 0.00487408610885459, 'mean_word_length': 4.980582524271845, '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}}
Verification of effectiveness of a matrix converter with boost-up AC chopper by using an IPM motor

This paper describes the matrix converter that features boost-up functionality. The proposed circuit topology connects a V-connection AC chopper at the input side of the matrix converter to achieve the boost-up function. The matrix converter and the V-connection AC chopper are controlled independently, where a virtual indirect control method is applied to the matrix converter, and an open-loop control is applied to the V-connection AC chopper. However, the efficiency of the proposed circuit is low due to the extra loss from the V-connection AC chopper. In this paper, the efficiency of the proposed circuit and the conventional matrix converter is evaluated by using a 3.7kW IPM motor in the simulation and the experiment. The simulation results confirm that by implementing field-weakening control in the conventional matrix converter, the losses are lower than that of the proposed circuit topology, where the proposed circuit improves the efficiency by 12%. According to the experimental results, it is obtained that the proposed circuit can improve the efficiency of 13% in compare with the conventional matrix converter.