Design and Experimental Verification of a Short-Circuit Proof Six-Phase Permanent Magnet Machine for Safety Critical Applications

作者：Wu Fan; Zheng Ping^*; Sui Yi; Yu Bin; Wang Pengfei

来源：IEEE Transactions on Magnetics, 2014, 50(11): 8204304.

DOI：10.1109/TMAG.2014.2320902

• Fault tolerance
• fractional-slot concentrated winding (FSCW)
• multiphase machine
• safety critical
• short circuit

By making use of leakage flux components, a multiphase permanent magnet (PM) machine constructed with fractional-slot concentrated windings can confine winding short-circuit current to rated current to avoid further damage when the stator winding gets short-circuited. However, those high-winding-inductance machines suffer from high PM demagnetization risks. Design principles to avoid PM demagnetization are discussed in this paper to deal with this issue. In addition, mathematical analyses of short-circuit current and torque pulsations are developed, which reveal the physical nature and offer an effective way to investigate the machine performances. Short-circuit fault remediation methods utilizing two-phase symmetry of asymmetric six-phase machine is proposed. Furthermore, a 24 kW prototype machine was fabricated and experimental verification has been conducted.

• 出版日期2014-11
• 单位哈尔滨工业大学