1.Key Laboratory of Modern Agricultural Equipment and Technology,Ministry of Education ＆ Jiangsu Province,Jiangsu University,Zhenjiang,Jiangsu 212013,China; 2.School of Electrical and Information Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013,China）
Abstract：To solve those problems such as difficulty in observing and controlling flux linkage,and complexity of estimating torque in brushless DC motors （BLDCM） direct torque control （DTC）,a novel scheme was proposed. Mathematic model of BLDCM was established. The back electromotive force shape function method was adopted to simplify electromagnetic torque calculation when the torque was invariable. The proper stator voltage space vector was selected according to the output of the torque hysteresis controller and the current rotor flux sector. Simulation and experiments on a selected BLDCM were carried out. The results show that this scheme is simple and effective,and it is easy to realize in the industrial application,while to keep the fast torque response.
2009, Vol. 30 
