A comparative study of various methods for parameter estimation of PMSM

Parameter of machine can change due to temperature, saturation effects and other environmental effects. So the estimation of various parameters is very essential for the accurate operation of control algorithm for the machine. This paper discusses various methods of parameter estimation for permanent magnet synchronous motor (PMSM). PMSM is selected due to high performance, high efficiency, high torque to inertia ratio [1] etc. For PMSM different parameter of machine can be evaluated by different methods, study is done for the same and comparison is presented in this paper. Parameters can be evaluated by online and off line estimation methods. Online methods for parameter estimation have its advantages over offline methods. Online method of parameter estimation is adopted to find the shaft speed, hence eliminating mechanical sensor and reducing the cost of PMSM.