Novel control technique of IPMSM using state feedback control with quadratic linearization

This paper presents a new control technique for Interior Permanent Magnet Synchronous Motor (IPMSM) drives. The new idea of this control technique is that it employs a new linearization approach to linearize the nonlinear state equation of the IPMSM. This new linearization approach is a quadratic linearization method based on a change of coordinates and feedback. Against of feedback linearization method based on differential geometric, quadratic linearization does not introduce singularity in the systems. After linearization a state feedback controller is designed and linear quadratic regulator is used to regulate properly the controller gain matrix parameters. This control technique controls IPMSM in whole speed range using maximum torque per ampere control strategy and voltage constraint tracking control strategy. MATLAB/SIMULINK software is used for simulation and verification of the theory.