Fuzzy logic control of PMSM fed by voltage source inverter associated to hybrid current controller

For most applications, the load torque and parameters variations are important, requiring robust control methods to achieve a good regulation of the motor speed over all operating conditions. In this paper, a fuzzy algorithms for speed control of permanent magnet synchronous motor (PMSM) drive are proposed. An adaptive FLC is also described and its performances have been investigated for the case of vector controlled PMSM. A comparison between FLC and fixed gain PI controller is presented by simulation results, that verify effectiveness of the approach under various operating conditions and provide fast and robust control. The paper presents also a detailed analysis of hysteresis and hybrid current controllers for PMSM fed by conventional voltage source inverter. In addition, fixed switching frequency at different operating conditions becomes possible with the proposed hybrid current controller.