Sensorless Fuzzy Speed Control for Single Phase Induction Motors

The control scheme is presented to aim at the speed control of single phase induction motor. It consists of fuzzy controller, two tracking differentiators, and speed estimator. At first, The design of rotor speed estimator is carried on, which the rotor speed can be obtained according to the general mathematic model of single phase induction motor and rotor estimating speed be used instead of rotor speed. Then the design of hybrid fuzzy tracking differentiator controller is completed, which the output signal of the two tracking differentiator are served as the fuzzy controller input signals. Simulations of the control scheme presented are realized by the Simulink in the Matlab. The total model is made up from every sub model of the components in the control scheme presented. The simulation results prove total control system performance is normal. And it has the advantage of the speed estimator and hybrid fuzzy tracking differentiator controller.