K.KIRUTHIKA , R.NANDHINI, R. S. S. , G. , J. Implementation of Chopper Fed Speed Control of Separately Excited DC Motor Using PI Controller. International Journal of Engineering and Computer Science, india, v. 6, n. 3, 2017. Disponível em: http://ijecs.in/index.php/ijecs/article/view/3410. Acesso em: 2 may. 2024.