| Citation: | CHEN Y，JIANG Q L，WANG J S，et al. Current chopping control strategy of switched reluctance motor based on inductance characteristics[J]. Journal of Beijing University of Aeronautics and Astronautics，2023，49（3）：647-656 （in Chinese） doi: 10.13700/j.bh.1001-5965.2021.0269
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Switched reluctance motors (SRMs) often use current chopping control (CCC) when running below the base speed. In the traditional control, however, the dynamic tracking ability of current is weak, the torque ripple in the commutation area is large, and the switching frequency of power devices is not fixed. A soft chopping current control strategy is proposed based on reference current compensation and the interval segmented according to the characteristics of inductance curve changes. In the low-inductance section, the reference current is compensated according to motor speed and load to improve the torque output capability and dynamic response capability of the phase winding during commutation. In the linear rising stage of the inductance curve, a fixed frequency pulse width modulation (PWM) wave is used to control the output torque to make it smoother. Then this study sets up a three-phase 12/8 pole switched reluctance motor simulation model and a semi-physical experiment platform. Considering the operating conditions of the motor with different speeds and loads, the torque ripple index is chosen for comparison. Simulation and experimental results show that the control method proposed in this paper can effectively reduce the torque ripple of SRMS and improve the performance of the motor.
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