1Hu Jun,Wu Bin.New integration algorithms for estimating motor flux over a wide speed range[J].IEEE trans.Power Electro, 1998,13(5): 969-977.
2Jehudi Maes,Jan A Melkbeek.Speed-sensorless direct torque control of induction motors using adaptive flux observer[J].IEEE Transactions on Industry Applications, 2000,36(3): 778-785.
