Permanent Magnet Machine with Stator Tooth Offset to Improve Fault-Tolerant Capability

The traditional three phase permanent magnet machine has poor fault-tolerant capability. In this paper, the fault-tolerant tooth and the stator tooth offset are proposed to achieve the better fault-tolerant capability. This paper introduces the structure of traditional permanent magnet machine (TPM), fault-tolerant machine with unequal tooth widths and tooth tips widths (UT-FTPM) and fault-tolerant permanent magnet machine with stator tooth offset (STO-FTPM). Their electromagnetic properties, including output torque, self-inductance and mutual inductance, are compared and analyzed.