Abstract
This paper develops a novel switching variable proportional desaturation proportional integral (SVPDPI) regulator for speed control of switched reluctance motor (SRM) drive system. Firstly, the idea of desaturation is adopted in the SRM drive system in order to eliminate the integral saturation phenomenon of traditional proportional integral (PI) regulator. Secondly, the variable proportional desaturation PI (VPDPI) regulator is proposed to enhance the response speed of SRM drive system by introducing the concept of variable proportion. In addition, in order to improve the smoothness of the SRM start-up speed, a switching speed regulator is further designed based on the VPDPI regulator. Finally, the principle of error threshold segmentation is introduced into SVPDPI regulator, whose control performance is compared with among other three regulators under rated speed, various speeds and load-torque conditions. Meanwhile, the dynamic performance, steady performance and start-up performance are comprehensively analyzed. The simulation experiment results commendably indicate that the proposed SVPDPI regulator is superior in tracking performance, anti-disturbance performance and speed range.
Highlights
With the increasingly stringent global demand for energy conservation, the applications of electric drive in transportation, industry, agriculture and other fields are gradually increasing [1]– [4]
The idea of variable proportional desaturation is proposed to achieve better dynamic and steady performance in order to improve the dynamic performance of the regulator
In order to improve the chattering of the motor in the starting stage, the control algorithm is further improved in this paper, and a design idea of a switchproportional desaturation regulator is proposed to ensure the speed, accuracy and stability of the switched reluctance motor drive system in the starting stage and the response process
Summary
With the increasingly stringent global demand for energy conservation, the applications of electric drive in transportation, industry, agriculture and other fields are gradually increasing [1]– [4]. The traditional PI regulators are used to achieve the speed control of SRM drives [28]. The desaturation idea is adopted to design SRM speed regulator such that the stability of motor control system is improved. In order to improve the chattering of the motor in the starting stage, the control algorithm is further improved in this paper, and a design idea of a switchproportional desaturation regulator is proposed to ensure the speed, accuracy and stability of the switched reluctance motor drive system in the starting stage and the response process. When the regulator entered the saturation state, the effect of integral element is removed This method can resist the integral saturation phenomenon and improve the dynamic response performance of the system. How to eliminate the influence of integral saturation in essence is worthwhile without sacrificing the steady-state performance of the system
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