{'fraction_non_alphanumeric': 0.03231597845601436, 'fraction_numerical': 0.0008976660682226212, 'mean_word_length': 4.747422680412371, '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}}
Vector space decomposition based control of neutral-point-clamping (NPC) three-level inverters fed dual three-phase PMSM drives

This paper is to study the control scheme for neutral-point-clamping three-level (NPC-3L) inverters fed dual three-phase permanent magnet synchronous motor (PMSM) drives based on vector space decomposition (VSD). The key is to propose a novel VSD based space vector modulation (SVM) strategy for the dual-three phase drives. The torque of the PMSM drive is controlled by voltage components on α-β plane while the current harmonics are suppressed by voltage components on x - y plane of the VSD-SVM. The upper and lower capacitor voltages are balanced well in DC link. Based on the proposed VSD-SVM strategy, a simple control scheme is presented for the dual three-phase PMSM drives. The principles of the proposed modulation strategy and control scheme are described in detail. The experiments are carried on a laboratory prototype to verify that the proposed VSD-SVM based control scheme can provide both good steady-state and dynamic performance for the dual three-phase PMSM drives.