A Study of 10 MHz Multi-Sampling SVPWM method for Three Phase Inverter using USPM Controller

Abstract

In the development process of power electronics system, a wide range of know-how is required for special purpose circuits such as main circuits, control circuits and gate drive circuits. The Universal Smart Power Module (USPM) has been proposed to solve these problems by converting the above circuits into one module to reduce the design cost and development time. To realize the USPM module, USPM controller was developed which has very high speed A/D converter and high specification SoC-FPGA chip, ultra high speed control calculation can be realized. In this paper, a new space vector PWM (SVPWM) method that improves the transient response and robustness by 10MHz sampling between carriers and compensating the output vector in real time. The output vector is recalculated in every 0.1us by using USPM controller, and the recalculation immediately reflected to the output vector, which improves the output characteristics of three phase inverter. The advantage of high speed sampling digital feedback method are verified.