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现有方案虽然可以检测三相电路的相序异常,但是缺乏一种对强电负载的电源供给的控制方法,即尽管主控板可以发现相序错误,但是强电负载端已经被异常的电源供给损坏。本文结合自身产品的控制方案,提出了一种开关电源的保护方法。由于三端稳压器无论电压是220V还是380V都能给主板上的通信芯片提供稳定的工作电源,可以利用通信芯片的软件程序来控制强电负载端的电源开关N线的通断,来达到保护元器件的目的。
Although the existing scheme can detect the phase sequence anomalies of the three-phase circuit, there is a lack of a control method for the power supply of the strong electric load. That is, although the main control board can find the phase sequence error, the heavy-current load end has been abnormally powered Supply damage. In this paper, the control scheme of its own products, put forward a method of switching power supply protection. As the three-terminal voltage regulator is 220V or 380V can provide a stable working power supply on the communication chip on the motherboard, you can use the communication chip software program to control the power switch on the N-line power switch off, to achieve protection The purpose of components.