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This paper describes inverter for multi-phase brushless DC ship propulsion motor. This inverter has high efficiency and relatively small size. It is separated multi-phase brushless DC motor drive and motor-inverter built-in type. Some inverter modules are damaged, the motor can be limited drive by other living inverters. In order to maintain high efficiency at low speed, same phase coils of different...
This paper deals with a separate double-winding 12-phase BLDC motor fed from individual H-bridge inverters. The system is fault tolerant in that continuous operation is possible under fault conditions. Every phase is electrically independent from each other and doubly wound to intensify the redundancy of the system. Furthermore, each phase is asymmetrically 15 degrees apart to have the same torque...
In this paper, a method to obtain high efficiency at low speed region of permanent magnet motor with redundant structure is suggested. The output power of large permanent magnet motor like ship propulsion system varies very much as the speed changes. At low speed region, the output power of the motor is very much smaller than that of high speed region and the efficiency decrease also. In order to...
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