高压隔离的多路低压直流电源  

High-voltage isolated multi-channel low-voltage DC power supply

作　　者：赵秋山[1] 冯冬青[1] 卢宜[1] 

机构地区：[1]郑州大学电气工程学院,河南郑州450001

出　　处：《电力自动化设备》2010年第1期136-138,144,共4页Electric Power Automation Equipment

基　　金：国家自然科学基金项目(60774059)~~

摘　　要：提出了一种基于高频电流互感器的多路低压直流电源设计方案,它实现了高低压电路的隔离。在低压侧采用电流型定频PWM控制器UC3842控制的单端反激电路产生稳定的脉冲电流,通过高频电流互感器传递脉冲能量和实现隔离高压,高压驱动供电电路之间的隔离由多个电流互感器实现,并且该电源可以实现输出不同等级的电压和电流以满足驱动电路的要求。试验结果表明,该方案能为大功率电力半导体器件提供足够大的驱动电压和驱动电流,提高高压控制系统的可靠性和稳定性。A design scheme of multi-channel low-voltage DC power supply is proposed based on high-frequency current transformer,which isolates the low-voltage circuitry from the high-voltage circuitry. At the low-voltage side,the single-end flyback circuit is used to generate the stable current pulses,which is controlled by fixed-frequency PWM controller UC3842,and the high-frequency current transformer is used to transfer the energy of pulses while isolate the high voltage. The isolation between high-voltage drivers is realized by applying multiple current transformers. Different grades of voltage and current can be generated to meet different requirements of drivers. Experiments show that, it can provide enough driving voltage and current for high power semiconductor devices and improve the reliability and stability of high-voltage control system.

关 键 词：高压驱动电路 高压隔离驱动电源 高压隔离电源 电磁送能 电源 

分 类 号：TM46[电气工程—电器] TN86[电子电信—信息与通信工程]