SCR谐振逆变在低压大电流开关电源中的应用

SCR resonant convertor for low voltage high current switching power supply

电源作为各种用电设备的重要组成部分,其性能的优劣对设备的工作状态会产生直接的影响。首先介绍了一种可控硅(SCR)谐振式变换电路的工作原理,之后通过结合理论计算、仿真分析及实验测试的方法,证明了将该逆变电路应用在低压开关电源中设计方法的可行性,且在论文最后给出了在带载1 200W、输出电流为20A时开关管阴极与阳极之间电压的仿真波形及实验波形。这种开关电源最大的特点是:整个开关电源只采用一个可控硅来实现逆变,因而器件少,电路结构非常简单,可靠性强,易小型化,为大功率开关电源的设计提供了一个很好的解决方案。

The power supply which is an important part of electric equipment will have a big effect on electric equipment. Firstly, this paper introduces the working principle of a resonant convertor which use thyristor as switch devices. Then, theory analysis, the simulation and the practical experiments verifies the theoretical analysis and effectiveness in practical applications. Finally, the circuit has been verified in low voltage switch-mode power supply which is output of 20 A/1 200 W and the experimental waveforms were given. Compared with other switch power supply has the following characteristics： simple circuit structure, fewer devices, high reliability, and thus can be miniaturized, That will be a good solution for high power switch supply.