PWM-Based Direct Instantaneous Torque Control of Switched Reluctance Machine
Zhu Yesheng1,2,Zhang Guobao1,2,Huang Yongming1,2
1.Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Nanjing 210096 China 2.School of Automation Southeast University Nanjing 210096 China
Abstract：To solve the serious torque ripple of switch reluctance machine (SRM), a control method is proposed by combining direct instantaneous torque control (DITC) and pulse width modulation (PWM). The electric angle period of three phase SRM is partitioned into nine sectors according to the torque characteristics; Meanwhile, the selection principle of the magnitude of the torque hysteresis loop is given so that the torque hysteresis loop can be adjusted adaptively when operating; Moreover, different from conventional DITC method, the duty ratio of the phase voltage of proposed method is real-time adjusted according to the operating condition and optimized conducting rules instead of only three switch mode for each phase at every sample period. Through using Matlab/Simulink environment and switched reluctance motor drive (SRD) platform, this method was validated and compared with conventional DITC control method, the results reveal that the proposed method is able to solve the obvious problem that conventional DITC control method may has, such as high current ripple. In addition, the torque loop sampling time of DITC can be extended, which shows high application value in the development field of switched reluctance motor type electric vehicle.
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2017, Vol. 32 
