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对于需要两路电源供电的一类负荷设备,其一路电源发生断电或故障时,另一路电源必须能立即投入使用,以保证设备正常工作。本文介绍两种较为简单但又比较适用的互投控制电路,以便让同行在实际使用时得到一些帮助,现对其原理说明如下。 1.有主次的双电源互投电路 对有主次的或一主一备酌双电源线路,主要适用于以动力电源为主,照明或其他备用电源为辅的双电源切换的场合。其主电路及控制线路图见图1。
For a type of load equipment that needs two power supplies, when one power supply fails or fails, the other power supply must be put into use immediately to ensure the normal operation of the equipment. This article describes two relatively simple but more applicable control of each other to vote in order to allow peers in actual use to get some help, the principle is described below. 1. There are primary and secondary dual power supply each circuit has a primary and secondary or a master and a standby dual power lines, mainly for power-based, lighting or other backup power supplemented by dual power switching occasions. The main circuit and control circuit shown in Figure 1.