TY - CONF T1 - Sensorless direct torque control of a permanent magnet brushless AC drive via an extended Kalman filter JO - IEE Conference Publication PY - 2004/01/01 AU - Liu Y AU - Zhu ZQ AU - Shi YF AU - Howe D ED - VL - 1 SP - 303 EP - 307 Y2 - 2025/07/15 ER -