便携式电磁辐射检测仪电源系统设计  

Power system design of portable electromagnetic radiation detector

作　　者：张玉涛[1] 张一鸣[1] 朱学政[1] 王小丽[1] 

机构地区：[1]北京工业大学电子信息与控制工程学院,北京100124

出　　处：《传感器与微系统》2017年第2期84-87,共4页Transducer and Microsystem Technologies

基　　金：国家科技支撑计划资助项目(2012BAJ24B00)

摘　　要：针对目前便携式电磁辐射检测仪电源系统的不足,设计了一种性能优良的电源系统。系统以正激变换器为主电路,采用低边有源箝位电路复位方式,电流峰值检测的双闭环控制模式,同时增加了温度控制系统。实现了功率开关管的软开关工作模式,降低了电磁干扰,提高了系统的动态响应,减小了电压输出纹波,改善了电源的低温特性,增强了电源续航能力。该系统已在便携式电磁辐射检测仪中得到实际应用,证明了设计的合理性。Aiming at the shortage of the power supply system of the portable electromagnetic radiation detector, a power supply system with excellent performance is designed. The system adopts forward converter as the main circuit and adopts the low side of the active clamp circuit as reset circuit. The double closed-loop control mode, the current peak detection is adopted and a temperature control system is added. The soft switching operation mode of the power switch tube is reahzed,the electromagnetic interference is reduced,the dynamic response is improved, and the voltage output ripple is reduced. Low-temperature characteristics is improved for enhancing power endurance. The system is applied in portable electromagnetic radiation detector, the rationality of design is proved.

关 键 词：正激变换器 有源箝位 双闭环控制 电磁干扰 温度控制 

分 类 号：TN86[电子电信—信息与通信工程]