DSP-Based Space Vector Modulation for a VSI-Fed Permanent Magnet Drive

Voltage Source Inverters (VSI) fed variable speed alternating current (AC) drives are widely used in many industrial applications. In order to obtain variable voltage and frequency the VSI is commonly firing by using Pulse Width Modulation (PWM) techniques such as the Space Vector Modulation (SVM), which provides a suitable strategy to control the VSI. This paper presents the digital implementation of a modulation algorithm for a three phase VSI-fed a Permanent Magnet Synchronous Machine (PMSM). The SVM algorithm is first performed by simulation based on the software Matlab/Simulink^®, and then it is digital implemented by using a floating TMS320F28335 Digital Signal Processor (DSP). Simulated and experimental results are presented to demonstrate the effectiveness of the adjustable frequency electrical drive.