基于FPGA的实时死区补偿方法研究

Research on Real-Time Dead-Time Compensation Method Based on FPGA

对逆变器的死区原因及影响进行分析,介绍了常规死区补偿方案,并提出了一种基于FPGA的实时死区补偿方法。该方法可根据实际工况对三电平逆变器实时进行主管和辅管的死区优化。通过MATLAB对该死区补偿方法进行仿真验证,表明此方法能够有效改善死区引起的电流畸变,提高直流侧母线电压利用率和逆变器性能,具有较高的工程应用价值。

In this paper,the causes and effects of the dead-time of the inverter are analyzed. The conventional deadtime compensation scheme is introduced,and a real-time dead zone compensation method based on FPGA is proposed. For the three-level inverter,the dead-time optimization of the main IGBT and the auxiliary IGBT can be performed in real time according to the actual working conditions. The dead-time compensation method is simulated and verified by MATLAB. Finally,the experimental results show that the method can effectively improve the current distortion caused by dead-time, improve the DC side bus voltage utilization and inverter performance. It has a high engineering application value.