Application of fuzzy logic techniques to robust speed control of PMSM

The paper deals with the problem of robust speed control of electrical servodrives. A robust controller is developed using a nonlinear IP controller. The controller nonlinear characteristic is obtained due to fuzzy logic technique application. An original method of controller settings adjustment is presented. The use of this adjustment procedure ensures robust speed control against the variations of the moment of inertia and a step change of load torque. Simulations and laboratory results validate the robustness of the servodrive with permanent magnet synchronous motor.