改进型低纹波Cockcroft-Walton倍压电路及其特性研究

多级倍压整流器倍压纹波和电压跌落分别受级数次方的影响,在级数增加的情况下会明显增加。在最低级数2倍压电路的基础上,采用移相和反相叠加实现2N倍压电路。使用三相组式变压器输出绕组三相独立连接直流二倍压电路,通过并联输入、串联输出实现6脉周期性叠加,构建12倍压电路。通过叠加,大幅度削弱了脉动的幅度。对纹波和电压跌落进行了理论分析和估算,并与经典型和对称型Cockcroft-Walton多级倍压电路进行比较。结果表明,该电路可以显著减小电压纹波和电压跌落,并明显缩短了输出电压稳态建立的时间。

Advanced Low Ripple Cockcroft-Walton Voltage Multiplier Circuit and Its Characteristics Research

The ripple voltage and voltage drop of multilevel voltage multiplier are affected by the 2th or 3nd power of stage number respectively.In the case of increasing in the stage The ripple voltage and voltage drop would significantly increase. In this paper, on the basis of the lowest level voltage double circuit, the proposed circuit adopts shift and the phase superposition to realize 2N time voltage multiplier circuit. By using three-phase independent connection group of three-phase transformer, output winding is connected to dc double voltage circuit. 12 times voltage circuit is built by parallel input, serial output to realize 6 pulses periodic superposition. Through the overlay, the pulsating amplitude is greatly weakened. The theoretical analysis and estimation is made for Ripple and voltage drop, and comparison to the typical and symmetrical Cockcroft-Walton multistage voltage multiplier circuit is carried out. Results show that the circuit can significantly reduce the voltage ripple and voltage drop, and significantly reduces the output voltage steady set up time