The Position and Speed Estimation of Switched Reluctance Motor using Sliding Mode Observer

초록

For the speed control of motors, the position or speed sensors are necessary to obtain the position information of the rotor. Specially, SRM needs an accurate rotor position data because both the rotor and the stator have a salient pole structure. High functional sensors like resolver or encoder are expesive and have complex connecting lines to the controller so the pure signals are apt to be mixed with noises. In the sight of SRM drives, the high temperature, heavy dust, and the EMI surroundings reduce the reliability of speed and position sensors therefore the speed and position sensorless control algorithms using observer have been accepted widely. In this pater An adaptive sliding observer is descrived to control the SRM without speed or position sensors. The adaptive sliding observer is set on the basis of variable sturucture control theory. The sliding surface is constructed by current error terms and this surface guarnatees the errors converge to 'zero'. The stability of observer is affirmed by Lyapstabilyty analysis and popov's hyper stability theory.