A Comparison of Phase Estimation Between Hall Sensors and Sliding Mode Observer
This paper presents a comparison about phase estimation between Hall sensors and sliding mode observer (SMO).The phase estimation result corresponds to the control effect of Permanent-magnet Synchronous Motor (PMSM).Low-resolution Hall-effect sensor is widely used in PMSM because of its good comprehensive performance.Sliding mode observer is a frequently-used algorithm of PMSM sensorless control.The rotor phase estimated by Hall sensors has a good steady-state performance but some ripple or chattering components occur when the rotor is accelerating,decelerating or fluctuating.As a contrast,the phase estimated by SMO has an attractive robustness to speed fluctuation as well as parameter variations but the estimation result has some vibrations under steady condition which is caused by the SMO algorithm itself.This paper contrasts the SMO with Hall sensors in view of control effects both under starting state,steady state and speed fluctuation state.The comparison is illustrated by the phase estimation results and the phase currents response.All the work is realized by Matlab/Simulink and the simulation results show the relative merits of SMO and Hall sensors.
phase estimation Hall sensors sliding mode observer starting state steady state speed fluctuation state
Ziyou Song Jianqiu Li Minggao Ouyang Liangfei Xu
1State Key Laboratory of Automotive Safety and Energy,Tsinghua University,Beijing,China
国际会议
沈阳
英文
1737-1745
2012-09-26（万方平台首次上网日期，不代表论文的发表时间）