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| A High Efficiency Direct Instantaneous Torque Control of SRM |
| Li Zhenguo, Kan Zhizhong |
| Key Lab of Power Electronics for Energy Conservation and Motor Drive of Hebei Province Yanshan University Qinhuangdao 066004 China |
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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.
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Received: 14 April 2009
Published: 04 March 2014
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2010, Vol. 25 
