Digital Control of PWM Inverter Using Ultrahigh-Speed Network for Feedback Signals with Communication Disturbance Observer Based on Rocket I/O Protocol

摘要

A new network communication system for a power electronics controller that transmits the feedback signal from the sensors using an FPGA-based hardware controller was proposed. Based on the RocketI/O network controller, a customized Rocket I/O protocol was implemented to achieve high-speed feedback communication between two FPGA controllers. One-megahertz variable sampling quasi-multirate deadbeat control was applied for the PWM inverter control. The 1-MHz sampled data were transmitted using the Rocket I/O protocol and proper operation of the feedback control was experimentally verified. To compensate for the network delay of the feedback signal, a communication disturbance observer was combined with the network feedback system. The advantage of the proposed method was verified.