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引言在晶体管计算机使用的低压大电流的调节电源中,继电保护问题迄今尚未完满解决。由于熔断丝承受振动性能很坏及因热堕性而使切断的延续时间较长,又由于电磁式有触点继电器经常承受机械的和电弧的磨损而接触不良,反应的速度较慢,以致电源系统的工作可靠性不能得到保证。目前,许多国外文献推荐和介绍了关于用磁放大器元件或晶体管放大器作成的无触点继电器的过载、过压和欠压保护线路。这样的线路坚固、可靠、灵敏,是解决晶体管计算机调节电源继电保护问题的较佳方案,因而也成为最有发展前途的过载保护方案。本文是根据主要参考文献[1]、[2]和试验结果编译而成,文中将介绍两种保护线路形式——全磁式和磁晶结合式,并阐述其工作原理及实验结果。
INTRODUCTION In low-voltage, high-current regulated power supplies used in transistor computers, relay protection has so far not been fully resolved. Due to the fuse to withstand vibration performance is very bad and due to thermal degradation of the cut off a longer duration, but also because the electromagnetic contact relays often bear mechanical and arc wear and poor contact, the reaction speed is slow, so that the power supply The reliability of the system can not be guaranteed. At present, many foreign literature recommends and introduces overload, overvoltage and undervoltage protection circuits for contactless relays made of magnetic amplifier components or transistor amplifiers. Such a strong, reliable, sensitive circuit is to solve the transistor computer power supply relay protection better solution, it has also become the most promising overload protection program. This paper is based on the main reference [1], [2] and the test results compiled from the article will introduce two kinds of protection circuit - all-magnetic and magnetic crystal combination, and describes its working principle and experimental results.