THE H-INFINITY ESTIMATOR DESIGN FOR IPMSM WITH DISTURBANCE OBSERVER

THE H-INFINITY ESTIMATOR DESIGN FOR IPMSM WITH DISTURBANCE OBSERVER

To achieve precise control performance of an electric motor, it is necessary to compensate for load torque, various parameter errors, and model errors. To this end, the load torque acting on the motor rotation shaft is designed and estimated using a disturbance estimator. The estimated load torque was used as input, and the estimated error in the load torque was assumed to be state noise, with current and speed states estimated using the H^∞ filter. As a result of applying the disturbance and state values estimated from the 1-horsepower IPMSM to speed control, a speed tracking error within 0.1[%] was obtained in steady state.