Research on Torque Ripple of Switched Reluctance Motor Based on Current Slope
Aiming at the problem of large torque ripple in low speed operation of switched reluctance motor, this paper presented a current predictive control strategy of fixed switching frequency to improve the current dynamic tracking ability and to realize the constant speed control of the motor. According to the electromagnetic relationship, the current slope of positive current, negative voltage and zero voltage in the current control cycle is estimated, and the duty cycle of the current cycle is predicted, so that the winding current can be precisely controlled. The simulation and experimental results verify the feasibility of the current predictive control strategy. It shows that the proposed method has a fast dynamic response and can track the reference current very well at low speed, which can restrain the torque ripple and electromagnetic noise.
Keywords: switched reluctance motor, current predictive control, current slope method, torque ripple
EHSANI M，FAHIMI B. Elimination of position sensors in switched reluctance motor drives：state of the art and future trends[J] . IEEE Transactions on Industrial Electronics，2002，49（1）：40—47.
KRISHNAN R. Switched reluctance motor drives：modeling，simulation，analysis，design and applications [M]. Boca Raton，FL：CRC Press，2001.
ZHU Y Y，ZHAO G F，YANG N. Designed and optimization for switched reluctance motor drive in electric vehicles [J] . Transactions of China Electrotechnical Society，2014，29（11）：88—98.（In Chinese）
CAI J，DENG Z Q. Sensorless control of switched reluctance motors based on phase inductance model in linear regions[J] . Proceedings of the CSEE，2012，32（15）：114—123.（In Chinese）
KUAI S Y，WANG P F，CHENG J H，et al. Four-quadrant position sensorless technology of switched reluctance motors based on variable coefficients inductance mode[l J] . Transactions of China Electrotechnical Society，2014，29（7）：114—125.（In Chinese）
LI M Q，CHEN X，REN X Y，et al. Sensorless control of switched reluctance motors based on typical positions of three-phase inductances [J] . Proceedings of the CSEE，2017，37（13）：3901—3908.（In Chinese）
GOBBI R，RAMAR K. Optimization techniques for a hysteresis current controller to minimize torque ripple in switched reluctance motors [J] . IET Electric Power Applications，2009，3（5）：453— 460.
YE J，BILGIN B，EMADI A. An extended-speed low-ripple torque control of switched reluctance motor drives[J] . IEEE Transactions on Power Electronics，2015，30（3）：1457—1470.
HUANG H N，HU K W，WU Y W，et al. A current control scheme with back EMF cancellation and tracking error adapted commutation shift for switched reluctance motor drive [J] . IEEE Transactions on Industrial Electronics，2016，63（12）：7381—7392.
PENG F，EMADI A. A digital PWM current controller for switched reluctance motor drives [C]//Transportation Electrification Conference and Expo. 2014.
YE J，MALYSZ P，EMADI A. A fixed -switching -frequency integral sliding mode current controller for switched reluctance motor drives [J] . IEEE Journal of Emerging and Power Electronic， 2015，3（2）：381—394.
WANG X L，XU Z L. Speed regulation control of switched reluctance motors based on PI parameter self-adaptation [J] . Proceedings of the CSEE，2015，36（16）：4215—4221.（In Chinese）
- There are currently no refbacks.