Development and Evaluation of a Power Hardware-in-the-Loop (P-HIL) Emulator Testbench for Aerospace Applications
In this work, the development of a P-HIL emulator testbench (Fig. 1) using EGSTON Power Electronics, COMPISO System Unit (CSU) CSU200-1GAMP6, and external hardware (Rockwell Automation PowerFlex 753 drive inverter) is explained. First, the testbench was evaluated by characterizing an accuracy region and showed satisfactory accuracy to follow the setpoints. The power circulating operation mode was configured and several applications (induction machine, active front end, and ATRU) were tested and compared with offline simulation. Most importantly, the P-HIL emulated an induction machine working with a 30 kW PowerFlex 753 drive under various working conditions (no-load, constant-load, step-load transient, start-up transient), and the results were compared to the real-world tests as shown in Fig. 2. It showed that the P-HIL emulator has excellent accuracy and flexibility, thus can significantly facilitate the future aerospace electrical system development.