摘要
研究了一种反激AC/AC变换器,提出了抑制谐波的控制方案,通过开环方式对变换器的占空比进行实时调节。与现有的使用恒定占空比控制斩波器相比,完全消除了交流输入电压中各次谐波;能使变换器将不稳定的劣质交流电变换成同频率的优质正弦交流电,显著提高了变换器对输入电压波形畸变的适应性。详细介绍了电路的工作及控制原理,分析并推导了调制函数的解析式,给出控制方案和主要参数设计。通过实验证明该电路具有很强的谐波抑制能力及良好的稳态和动态特性,负载适应性好,运行可靠。
A kind of flyback AC/AC converter is studied, the paper puts forward the control program of harmonic suppression,and the real-time adjustment of the transformation duty cycle through the open-loop approach.Compared with the existing chopper controller with the appliance of constant duty cycle, it realises the complete elimination of harmonic in the AC input voltage, enables the converter to transform the unstable low-quality AC to high-quality AC Sine with the same frequency, and improves the adaptability of the converter to the distortion of input voltage wave- form significantly.The paper introduces the work principle and control principle of the circuit, analyses and works out the analysis formula of the modulation function, and gives the control program and the design of main parameters.Also it proves that the circuit has a strong ability of harmonic suppression, good steady-state and dynamic properties and load adaptability, and reliable operation.
出处
《电力电子技术》
CSCD
北大核心
2011年第2期29-31,共3页
Power Electronics
关键词
变换器
谐波抑制
波形畸变
反激
converter
harmonic suppression
waveform distortion
flyback
