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This paper presents a novel high-performance sensorless IPMSM drive system and its application in washing machines. A new extended flux estimating method is developed here. Based on the extended flux estimating method, the rotor position and speed of an IPMSM can be obtained. Then, a closed-loop sensorless drive system has been implemented. The drive system starts from standstill and reaches 2000...
The paper proposes a novel extended flux estimating method for an interior permanent magnet synchronous motor. By using the proposed method, an extended flux can be systematically derived. Then, the shaft position and speed of the motor can be obtained. To achieve starting from a standstill and a low-speed range control, a current-slope estimating method is used to replace the extended flux method...
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