变速恒频电源研究

Research on Variable Speed Constant Frequency Power Supply

变速恒频电源系统是基于发动机拖动的发电机系统,为保证电源的频率和电压稳定性,研究逆变器中采用了固定开关点的优化SPWM技术,通过调节发电机励磁电流来调节输出电压的大小。变速恒频电源的输出符合三相供电体制,逆变器输出端设计了中点形成变压器以形成三相电源的中点。应用MATLAB软件中的Simulink仿真工具作为平台,对电源的输出结果进行了观测。分析了不同仿真参数对输出结果的影响,最终达到了电能输出的质量要求。

For the variable speed constant frequency AC power supply system, the regulator control part and the power converter constitute the main circuit. Voltage detection circuit and current detection circuit for a specific circuit are designed. In the inverter a fixed switch point of the optimized SPWM technology is used. By adjusting the generator excitation current, the size of the output voltage is adjusted. The output of the variable speed constant frequency power supply conforms to the three-phase power supply system. The midpoint is designed in the inverter output terminal to form the transformer to form the midpoint of the three-phase power supply. Using Simulink simulation tool in MATLAB software as the platform, the output of power supply is observed. The influence of different simulation parameters on the output result is analyzed, and the quality requirement of the power output is finally achieved.