Study of rotor position estimation algorithm based on back-EMF voltage for dual-winding fault-tolerant permanent magnet motor

An improved position estimation of the sensorless control system with online parameter identification based on back-Electromotive Force (EMF) voltage is presented for dual-winding fault-tolerant permanent magnet motor (FTPMM). In this system, rotor estimated by flux linkage and back-EMF which are generated each phase winding. By introducing phase-locked loop technology to compensate steady-state error parameters using least-square method forgetting factor, more accurate can be obtained. The current vector strategy improves fault tolerance makes it strong robust stability. simulation results have shown that data acquired both under healthy condition single-phase condition. Then, hardware experimental show feasibility validity proposed algorithm.