Compensation of rotor position estimation error due to stator winding resistance in signal injection based sensor less PMSM drives

Signal injection techniques are popular to extract rotor position information from low speed to stand still, however these techniques have error in rotor position estimation. In the literature estimated rotor position information neglect the stator winding resistance; this work analyzes the stator winding resistance effect on position estimation accuracy and proposes compensation technique to reduce the position estimation error introduced by stator winding resistance. Proposed compensation technique is validated by simulation results. This work also analyzes the position estimation error resulting from neglecting stator winding resistance and torque reduction.