A-R. Makki S. Improving the Response of Electromagnetic Servo Relay Drives (ESRD) Using PID Comp. and Multi-level Voltages. J. eng. sustain. dev. [Internet]. 2012 Dec. 1 [cited 2025 May 13];16(4):206-19. Available from: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1236