Direct instantaneous torque control system for switched reluctance motor in electric vehicles

• Published in: Journal of engineering (Stevenage, England) Vol. 2019; no. 16; pp. 1847 - 1852
• Main Authors: Liu, Lijun, Zhao, Mingwei, Yuan, Xibo, Ruan, Yi
• Format: Journal Article
• Language: English
• Published: The Institution of Engineering and Technology 01.03.2019; Wiley
• Subjects: control effect; control system synthesis; direct instantaneous torque control system; DITC control method; electric vehicle; electric vehicles; fractional-integral controller; fractional-order controller; fractional-order PID controller; fractional-order speed loop controller; machine control; PI control; reluctance motors; robust control; switch reluctance motor; switched reluctance motor; The 14th IET International Conference on AC and DC Power Transmission (ACDC 2018); three-term control; torque control; torque ripple; traditional PI controller; machine control; three-term control; PI control; fractional-order speed loop controller; electric vehicles; traditional PI controller; control system synthesis; reluctance motors; switched reluctance motor; torque control; control effect; fractional-order PID controller; fractional-order controller; switch reluctance motor; electric vehicle; torque ripple; fractional-integral controller; robust control; DITC control method; direct instantaneous torque control system
• ISSN: 2051-3305; 2051-3305
• DOI: 10.1049/joe.2018.8726

Switch reluctance motor is suitable for an electric vehicle driving system, which has the advantages of simple structure, high reliability of system and wide range of speed adjustment. In order to reduce the torque ripple of the system and improve the dynamic performance, a strategy of direct instantaneous torque control (DITC) based on a fractional-order proportion integration differentiation (PID) controller is proposed. According to the mathematical characteristics of the fractional-order controller, the form of the fractional-order speed loop controller is determined. Also, the parameters of the speed regulator are designed using the frequency-domain design theory of the control system. Then, the fractional-order controller is discretised. Compared with the traditional proportion integration (PI) controller, the fractional-order controller can have a better control effect. Simulation experimental results of the system show that the DITC control method has effectively reduced the torque ripple and the fractional-integral controller has reduced the overshoot and adjustment time and improved the robustness and disturbance resistance of the system.