单频双相整流降噪电路的仿真研究

Simulation Research of Single-Frequency Two-Phase Rectification Noise Suppression Circuit

新型的单频双相整流系统,通过傅立叶级数分析,有一个完整的解析解,但它的动态特性和噪声特性却难以在测试仪器上体现它的理论结果。为此从描写双相整流叠加技术的动态特性方程出发,采用小波域信号去噪算法建立了一个完整的数学模型,经M atlab的模拟仿真,证实了单频双相整流系统能使谐波中的二次谐波和六次谐波值为零,体现了双相整流在降噪方面的优点,为变换电源的纹波输出小于80μV,提供了可靠的理论依据。

There has been a complete analysis resolution through Fourier series analysis for new type single-frequency two-phase rectification system. However its dynamic and noise characteristics are difficult to embody theoretical results in the measuring equipment. To begin with the description of two-phase rectification overlay technological dynamics equation, a complete mathematical model was established. The Matlab simulation confirms that single-frequency two-phase rectification system can rectify the value of the two and six harmonics to zero. It embodies advantages of two-phase rectification in noise suppression. The ripple wave output of the inverse transformation source is smaller than 80 μV, it provides a reliable theoretical foundation for pure direct current source.