A carrier phase-shift three-level full-bridge converter based on combination of DSP and FPGA

Integrated power system (IPS) is the future of power system in shipboard. A carrier phase-shift three-level full-bridge converter based on DSP and FPGA is proposed in this paper, which is the core device of the DC zonal electrical distribution module (DC-ZEDM) in the new-generation medium-voltage DC shipboard IPS. DSP and FPGA are main chips in the controller of this converter. The basic principle, system configuration and implementation method of the controller are detailed introduced. The core idea is that FPGA receives the carrier shifting angle from an extern DSP through the data and address bus, and then generates phase adjustable PWM waveform, which can meet the real-time control need of the proposed converter in all conditions. Resources of DSP and FPGA are properly used, so the controller has advantages of fast speed, high control precision, strong expansibility and high reliability. A 750kW protype is implemented based on DSP and FPGA, experimental results match theoretical findings well, which verifies mentioned advantages of the controller.