Energy-Saving Control Algorithm for Speed Switched Reluctance Servodrives

Abstract

Speed switched reluctance servo drives based on switched reluctance motors are currently widely used in industry. This is due to the possibility of creating switched reluctance motors with better technical characteristics as compared to other types of electric motors currently in use, in particular, with higher efficiency values. The methods of addressing the challenge of increasing the efficiency of switched reluctance motors have been described in a number of publications. In particular, they note that the use of energy-saving algorithms to control the processes of winding switching, ensuring small electrical losses is one of the methods for increase in efficiency of switched reluctance motors. However, these publications consider switched reluctance motor as an isolated controlled object. This circumstance does not allow estimating the impact of implemented switched reluctance motor control algorithms on the main quality characteristics of speed switched reluctance servo drives as closed dynamic control systems, in particular, on speed switched reluctance servo drive speed error. It should be noted that, when solving any issues related to switched reluctance motor control, the level of pulsations of electromagnetic moment of switched reluctance motor is the important indicator of control algorithms efficiency. In view of the above, the relevant task is that of determination of energy-saving switched reluctance motor control algorithm, which operates as part of speed switched reluctance servo drive, ensuring a small speed error under two additional conditions: small electrical losses and small pulsations of electromagnetic. The article presents the results of solving this task and the evaluation of efficiency of the suggested energy-saving speed switched reluctance servo drive control algorithm by means of simulation modeling.