双栅极空气计数管多路混合电源设计与实现

基于双栅极空气计数管的工作原理 ,提出了多路输出电源的设计指标。根据电路形式的不同对多路输出电源的高压、中压和低压三个部分进行了深入设计 ,给出了不同形式的开关变压器的设计方法。中压输出电路以TL494为控制核心 ,它实现的功能包括 :设置输出控制、PWM控制、软启动、过流保护。实验表明 ,多路输出电源能够满足双栅极空气计数管的工作要求

Design of Multi-output Composite Power Supply for Double Grid Air Counter

By the working principle of Double Grid Air Counter (DGAC) employed in detecting exoelectron emission, we put forward the design specifications of the power supply. The article goes on with the further design of each part of the multi output power supply circuit. The high voltage output circuit is a single ended reverse exciting switching power supply and the middle voltage output circuit a push pull switching power supply under closed loop control and low voltage output circuit realized with integrated power circuit. To design different kinds of switching transformer, different methods are analyzed in detail. In middle voltage output circuit, the following functions can be realized with TL494 :(1) push pull output mode, (2) PWM control, (3) soft start, (4) over current protection. Experiments indicate that the multi output power supply, which adopts technology of PWM, not only satisfies the electrical requirements of DGAC, but also gets a high efficiency, realizes the miniaturization and has a rather long life duration.