High-power High-efficient and Simplified High-frequency Switching Power Supply for Electrolytic Plating

针对大功率电解电镀开关电源的输入整流级引起的无功和谐波等电能质量问题,研究了一种基于高效PWM整流的高频开关电源。该电源前级整流器仅用4个开关管来进行PWM整流,后级采用半桥逆变器进行高频变换,显著减少了开关数量。针对三相四开关PWM整流器,推导一种基于开关模型的无差拍控制方法,该方法可实现系统的快速、无差整流。针对多台开关电源的并联均流问题,提出一种基于虚拟阻抗的自均流控制方法,可实现多台电源的均流稳定运行。通过仿真与实验验证了所提结构和控制方法的正确性。

Considering power quality of power supply for electrolysis electroplating, high-frequency switch power supply （HSPS） based on a simplified PWM rectifier is discussed in this paper. As the traditional switch power supply, the pre-rectifier always adopts the uncontrolled rectifier which will bring on a lot of harmonic currents. In the paper, the pre-rectifier adopts a PWM rectifier with four switches, and the back DC/DC system adopts a half-bridge inverter for high-frequency inversion, so as to effectively reduce the number of switches.