FPGA implementation of an universal space vector modulator

Abstract

In this paper a new circuit implementation of a space vector PWM is presented. The modulator is developed using field-programmable gate array (FPGA) technology. The modulator takes the reference vector from the PC Bus, and constructs the modulated states to generate driving signals for the power switches. The modulator is a space vector PWM scheme including linear operation and transition to six-step mode. A dead time compensation technique is also considered. This modulator can be realized using a single IC from Altera, two EPROM's memories and some electronic circuitry for sensing the inverter leg voltages needed in dead time compensation. The proposed circuit is built and tested extensively, presenting a satisfactory performance.