“Design and Implement a Didactic Module of a Drive Chopper for Controlling a DC Machine in Four Quadrants Intended for the Electrical Control and PLC Laboratory”. MASKAY 1, no. 1 (November 1, 2011): 55–63. Accessed December 8, 2025. https://journal.espe.edu.ec/ojs/index.php/maskay/article/view/16.