智能传感器系统多路混合开关电源设计与实现  

Design of Multi-way Composite Switching Power Supply for Intelligent Sensor System

作　　者：袁小庆[1] 史仪凯[1] 赵江海[1] 

机构地区：[1]西北工业大学机电学院,陕西西安710072

出　　处：《核电子学与探测技术》2009年第1期125-127,199,共4页Nuclear Electronics & Detection Technology

基　　金：国家自然科学基金(50275125);航空科学基金(2007ZE53050)资助

摘　　要：根据双栅极空气计数管智能传感器系统的工作原理,提出多路混合电源的设计指标,结合开关电源的特点,分别对电源高压和中低压部分进行详细设计,其中中低压电路采用KA7500B为控制核心,可实现双通道脉冲输出、软启动、输出电压调节、欠电压保护和过流保护等功能。实验表明,多路混合电源可满足智能传感器系统的工作要求。By the work principle of double grid air counter intelligent sensor system for detecting low energy electron emission, the design specifications of the power supply is put forward. The article goes on with particular design of each part of the multi-way output power supply circuit. The high-voltage-output circuit is a single-end reverse exciting switching power supply, the middle-voltage-output circuit is a push-pull switching power supply under close-loop control and low-voltage-output circuit is realized with integrated power circuit. To design different kinds of switching transformer, varied methods are analyzed in detail. In middle-voltage-output circuit, the following functions can be realized with KA7500B： （1） push-pull output mode, （2） PWM control, （3） soft start, （4） lack-voltage protection, （5） over-current protection. Experiments indicate that the multi-way output power supply, which adopts technology of PWM, satisfies the electrical requirements of sensor system, gets a high efficiency, realizes the miniaturization and has a rather long life duration.

关 键 词：双栅极空气计数管 低能电子 开关电源 脉宽调制控制 

分 类 号：TN131.3[电子电信—物理电子学] TM13[电气工程—电工理论与新技术]