Simulation and Implementation of Space Vector PWM Using Look-Up Table

Abstract

With the recent advancements in digital electronics, it became possible to implement the space vector pulse width modulation (SVPMW) technique. Inherently this technique requires ample mathematical computations which hinder its implementation on low-end microcontrollers. A simple look-up table method has been proposed for time assignment calculations in three-phase inverter to ease out its implementation in the low-end microcontroller (i.e. 8 bit). Detailed analysis of the SVPWM is provided and Simulink model has been developed to check the viability of the proposed look-up table scheme and its practical considerations. An off-the-shelf 8-bit microcontroller has been used to carry out the design and proposed scheme implementation. An interrupt-driven operating system software has been developed in high-level language and stored in the microcontroller’s program memory. The performance comparison between the simulated and practical results of the look-up scheme is carried out. The look-up table scheme shows a close match in Total Harmonic Distortion, as compared to the simulation results. Simulation, implementation and testing of the proposed work have been carried out. Results discussion and error analysis are reported.