Abstract：In this paper, a new method of direct instantaneous torque control (DITC) with high efficiency for switched reluctance motor(SRM) is proposed. In the conventional torque control method, the pre-stored optimal torque sharing function(TSF) is applied. For example, TSF is employed in sinusoidal or linear function. However, due to the non-linear characteristic of SRM, the performance with both torque ripple reduction and high efficiency are hard to achieve by means of specific TSF curve for any load torque. Therefore, based on non-linear model of SRM, a new control strategy of DITC with high efficiency is presented, in which the TSF curve is not specified. According to current operating state, the command torque can be real-time distributed between conducting phases to reduce the torque ripple. Moreover, the overlapped region between two conducting phases can be effectively reduced to obtain fast commutation. Thus, the method of DITC with high efficiency can be realized through rational selection of turn-on angles. Finally, the validity of proposed method is verified by the simulation and experimental results.
李珍国, 阚志忠. 开关磁阻电机的高效率直接瞬时转矩控制[J]. 电工技术学报, 2010, 25(8): 31-37.
Li Zhenguo, Kan Zhizhong. A High Efficiency Direct Instantaneous Torque Control of SRM. Transactions of China Electrotechnical Society, 2010, 25(8): 31-37.
[1] Ahn J W. Switched reluctance motor[M]. Seoul: Osung Media, 2004. [2] Mueller M A. Switched reluctance machines with rotor skew[C]. International Conf. on Electrical Machines ICEM, 1998. [3] Husain Iqbal, Ehsani M. Torque ripple minimization in switched reluctance motor drives by PWM current control[J]. IEEE Trans. on Power Electronics, 1996, 11(1): 83-88. [4] Russa K, Husain I, Elbuluk M. Torque ripple minimization in switched reluctance machines over a wide speed range[J]. IEEE Trans. on Industry Applications, 1998, 34(5): 1105-1112. [5] Iqbal Husain.Minimization of torque ripple in SRM drives[J]. IEEE Trans. on Industrial Electronics, 2002, 49(1): 28-39. [6] Nisai H Fuengwarodsakul, Marcus Menne, Robert B Inderka, et al. High-dynamic four-quadrant switched reluctance drive based on DITC[J]. IEEE Trans. on Industry Applications, 2005, 41(5): 1232-1242. [7] Adrian David Cheok, Yusuke Fukuda. A new torque and flux control method for switched reluctance motor drives[J]. IEEE Trans. on Power Electronics, 2002, 17(4): 543-557. [8] Barrass P G, Mecrow B C. Flux and torque control of switched reluctance machines[J]. IEE Pro-Electr. Power Applications, 1998, 145(6): 519-529. [9] 李珍国, 魏艳君, 阚志忠, 等. 基于四电平功率变换电路的开关磁阻电机瞬时转矩控制[J]. 电工技术学报, 2007, 22(8): 144-149.
2010, Vol. 25 
