Determination of PMSM Parameters from Simple Load Test

This paper describes a method of determination of permanent magnet synchronous machines (PMSM) parameters using simple load test combination with a linear regression model, which can avoid the disadvantages of the traditional load test. In the test, only supply phase voltage, phase current and the rotor position would be required, then the linear regression model was improved to simplify algorithm using QR decompose of matrix. The parameters including e₀, R, L_d and L_q obtained by using this technique vary more smoothly, while results obtained by no load test are fluctuating. This method can be used to derive the nonlinear parameter identified model of PMSM in order to apply in an on-line computer controlled environment at the different operating conditions