Abstract：A direct torque control(DTC) strategy in static reference frame for brushless doubly-fed induction machine is presented in this paper. The estimation method for electromagnetic torque is deduced, that is, to observe fluxes and currents of power winding(PW) and control winding (CW) in the local αβ reference frame respectively, and then estimating the torque. Thus rotation coordinate transformation is prevented and parameters used in system are reduced. In addition, the switch table applied to both sub-synchronous and super-synchronous is constructed. The system’s structure is as simple as that for the DTC of induction machine, except that voltage and current of one more stator winding are required. The experimental results on a prototype show that the estimation of torque is stable, the speed for BDFIM is stably controlled from super-synchronous to sub-synchronous, and the controller can stabilize the system and maintain the desired speed when sudden torque changes are applied.
张爱玲, 贾文霞, 周赞强, 王昕, 王建华. 静止坐标系下无刷双馈感应电机的直接转矩控制[J]. 电工技术学报, 2012, 27(7): 63-70.
Zhang Ailing, Jia Wenxia, Zhou Zanqiang, Wang Xin, Wang Jianhua. Direct Torque Control for Brushless Doubly-Fed Induction Machine in Static Reference Frame. Transactions of China Electrotechnical Society, 2012, 27(7): 63-70.
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