Journal
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
Volume 48, Issue 3, Pages 987-995Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIA.2012.2190472
Keywords
Alternating-current (ac) motor drives; fault tolerance; high-speed elevators; industrial power system; multiphase motors
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This paper presents a nine-phase permanent-magnet synchronous motor (PMSM) drive system based on multiple three-phase voltage source inverters. The nine-phase PMSM was developed as a traction motor for an ultrahigh-speed elevator. The mathematical model of the motor was simplified through symmetry of the system. Using the simplified model, the drive system can be controlled by the well-known d-q control theory. The feasibility and validity of the drive system were experimentally demonstrated at the world's tallest elevator test tower. Moreover, an additional experiment was performed to ensure the fault-tolerance capability of the system.
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