永磁同步风力发电机自适应滑模观测器设计

In order to realize sensorless control of direct-driven permanent magnet synchronous generator,a kind of adaptive sliding mode observer control method was presented. First the sensorless control Principle of direct-driven permanent magnet generator was analyzed.Based on the mathematical model of the permanent magnet generator, the sliding mode observer equation was constructed.Considering the stability condition and the observation accuracy of sliding mode observer, the adaptive law of switch gain following the change of reference speed was set up . A modified saturation function instead of traditional symbol function was used to weaken the chattering strength of sliding mode observer . The adaptive law of back electromotive force and speed was designed , its stability was proved by lyapunov function. The simulation results show that the proposed adaptive sliding mode observer can accurate estimate the speed and position of rotor and has strong robustness against the change of generator parameters .