Abstract
This paper aims to provide a high performance sensorless control of interior permanent magnet synchronous motor (IPMSM) based on nonlinear position and speed observer with stator-resistance adaptation. The nonlinear observer gives estimation of the rotor position using a trigonometric function and the speed estimation is obtained from estimated position using proportional-integral (PI) tracking controller. In this paper, model reference adaptive system (MRAS) technique has been used for stator resistance estimation in sensorless speed control of IPMSM with space vector pulse width modulation (SVPWM). The MRAS technique is simple and it requires less computation time. Simulation results with 1.1 kW IPMSM have validated the effectiveness of the proposed sensorless speed control using nonlinear observer with stator resistance estimation.
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