Sensorless Control of IPMS on an Instantaneous Reactive Power Preceding Initial Position Estimation and Parameter Measurement

초기위치 추정 및 파라미터 계측을 선행하여 순시무효전력을 이용한 IPMSM의 센서리스 제어

Recently, the use of IPMSM is coming to be active, in many industrial applications. In sensorless drive of IPMSM, it is important to know the exact information of the initial rotor position, because the wrong estimation of the initial rotor position brings about the decrease of the starting torque, or a temporary reverse revolution, In addition, PMSM is necessary to use the accurate information of the inductance for the precise torque control owing to the reluctance torque. In this paper presents initial rotor position estimation method and, measure method of the each-axis inductance. And to minimize the speed estimations error, the estimated speeds are compensated by using an instantaneous reactive power in synchronously rotating reference frame.