Constraints and Precautions of the Experimental Implementation of the PWM Control of a Three-Phase Asynchronous Machine Using the dSPACE 1104 Board

This paper presents the experimental implementation of pulse width modulation (PWM) using the dSPACE 1104 board for a three-phase asynchronous machine (ASM). The PWM technique is commonly employed to control the speed and torque of motors by comparing a modulating signal with a triangular carrier waveform and generating a numeric signal (0 and 1) to regulate the machine’s voltage. However, the real implementation of this control presents several challenges. Thus, the objective of this article is to outline the necessary steps and precautions required to successfully implement PWM in real-time using the DSPACE 1104 board, and to analyze the system behavior in various test scenarios. To achieve these objectives, two tests were conducted: one with PWM control and another without it (direct startup). Additionally, a comparative study was performed to assess the performance and effects of each starting technique on the machine’s behavior. The results presented in this study were obtained using the Control Desk software. These results clearly demonstrate the performance of the PWM, validating the implementation technique used in this study.