Abstract：The high performance flux estimator is the key of sensorless induction motor(IM) direct torque control(DTC) system. So a new stator estimator method of combine the new modified low-pass filter(NMLPF) and phase locked loop(PLL) is proposed and a new induction motor sensorless DTC system base on the new method also is proposed. The new method improves the dynamic and static performance of sensorless induction motor DTC system. The simulation and experimental results show that the new sensorless IM DTC system has good dynamic and static performance and has good robustness to stator resistance.
何志明, 廖勇, 李辉. 一种新颖的无传感器异步电动机直接转矩控制系统[J]. 电工技术学报, 2009, 24(11): 21-25.
He Zhiming, Liao Yong, Li Hui. A Novel Sensorless Induction Motor DTC System. Transactions of China Electrotechnical Society, 2009, 24(11): 21-25.
[1] Lascu C, Boldea I, Blaabjerg F. Comparative study of adaptive and inherently sensorless observers for variable-speed induction-motor drives[J]. IEEE Transations on Industrial Electronics, 2005, 53(1): 57-65. [2] Holtz J, Quan J. Sensorless vector control of induction motors at very low speed using a nonlinear inverter model and parameter identification[J]. IEEE Trans. Ind. Appl., 2002, 38(4): 1087-1095. [3] Bose B K, Patel N R. A programmable cascaded low-pass filter based flux synthesis for a stator flux oriented vector controlled induction motor drive[J]. IEEE Trans. on Ind. Elec., 1997, 44(1): 140-143. [4] Tae Won Chun, Meong Kyu Choi.A novel start-up scheme of stator flux oriented vector controlled induction motor drive without torque jerk[J]. IEEE Transactions on Industry Applications, 2003, 39(3): 776-782. [5] Hinkkanen M, Luomi J. Modified integrator for voltage model flux estimation of induction motors[C]. In Proc. IEEE 27th Annu. Conf. Industrial Electronics, Denver, CO, 2001, 2: 1339-1343. [6] Li Yong, Huang Wenxin. A low cost implemention of stator-flux-oriented induction motor drive[C]. Proceedings of the Eighth International Conference on Electrical Machines and Systems, 2005: 1534-1538. [7] Myoung Ho Shin, Dong Seok Hyun, Soon Bong Cho. An improved stator flux estimation for speed sensorless stator flux orientation control of induction motors[J]. IEEE Transations on Power Electronics, 2000, 15(2): 312-318. [8] Comanescu Mihai, Xu Longya. An improved flux observer based on PLL frequency estimator for sensorless vector control of induction motors[J]. IEEE Transactions on Industrial Electronics, 2006, 53(1): 50, 56. [9] Zerbo M, Sicard P, Ba Razzouk A. Accurate adaptive integration algorithms for induction machine drive over a wide speed range[C]. 2005 IEEE International Conference on Electric Machines and Drives, 2005: 1082-1088. [10] 何志明, 廖勇, 向大为. 定子磁链观测器低通滤波器的改进[J]. 中国电动机工程学报, 2008, 28(18): 61-65. [11] 何志明, 廖勇, 向大为. 基于改进层叠式可编程低通滤波器的磁链观测方法[J]. 电工技术学报, 2008, 23(4): 53-58.
2009, Vol. 24 
