Identification of Brushless DC Motor Current Ring System

The brushless DC motor (BLDCM) cannot adapt to the fast response speed because of its nonlinear, multivariable, time-varying parameters, strong disaster and so on. On the basis of analyzing and simplifying the mathematical model of brushless DC motor current loop, a recursive least square method is proposed to identify the current loop model of brushless DC motor. This method can accurately identify the mathematical model of the motor current loop, and the established model is effective and feasible.