Development of an FPGA-based Mixed-domain Control Platform for Power Converter Applications

This paper presents a systematic approach for developing a mixed -domain control platform for high frequency power conversion applications. The practical implementation of closed-loop control in power converters is influenced by the operating switching frequency. The proposed design approach considers a wide frequency range (up to MHz) suitable for different applications and establishes the platform requirements accordingly. Key components are selected depending on the established criteria. The proposed control platform includes serial ADCs and DACs, parallel ADCs and DACs for high speed, protection circuits, PWM for gating, and digital communication features. A prototype of the control platform is fabricated, and the experimental results are presented. Based on the study of comparable control platforms, it is seen that the proposed design offers higher performance at a cost that is compatible with commercial applications.