Title :
Influence of speed EMF on position estimation error in carrier signal injection based sensorless control of PMSM
Author :
Jianmin Wang ; Jianwei Gao
Author_Institution :
Sch. of Electr. Eng., Shandong Univ., Jinan, China
Abstract :
The paper analyzes the influences of the speed EMF on rotor position estimation errors in high-frequency-signal-injection-based sensorless control of PMSM. Expressions of high frequency carrier current induced by the carrier voltage are derived for both rotating voltage injection and pulsating voltage injection method when the stator resistance and speed EMF terms are all taken into account. Then position estimation error expressions are deduced, and the influences of the speed EMF on the position estimation errors are discussed. Finally, simulation investigations are conducted. Simulation results confirm the theoretical ones.
Keywords :
permanent magnet motors; sensorless machine control; synchronous motors; velocity control; PMSM; carrier signal injection based sensorless control; high-frequency-signal-injection-based sensorless control; position estimation error; pulsating voltage injection method; speed EMF; Estimation error; Permanent magnet motors; Resistance; Rotors; Stator windings; Steady-state; high frequency carrier signal injection; influence of speed EMF; position estimation error; sensorless control of permanent magnet synchronous motor;
Conference_Titel :
Electrical Machines and Systems (ICEMS), 2012 15th International Conference on
Conference_Location :
Sapporo
Print_ISBN :
978-1-4673-2327-7