5YOUNG AHN K,SUNG HWAN K.A new scheme for speedsensorless control of induction motor[J].Industrial Electronics,IEEE Transactions on,2004,51(3):545-50.
6YANG G,CHIN T H.Adaptive-speed identification scheme for a vector-controlled speed sensorless inverter-induction motor drive[J].Industry Applications,IEEE Transactions on,1993,29(4):820-5.