我们在使用微机的过程中,突然停电或电压异常往往会给我们带来难以预料的损失。虽然微机中设计了稳压电源,使主机和显示器等能在180～240V范围内可靠的工作,但当电压低于180V或高于240V时就只好停机了。如在欠压下使用,由于机器电源不能供给足够的功率,驱动器和显示器等不能正常工作,数据可能被破坏;如在超压下使用,设备中的元器件容易击穿或功耗过大而损坏,输出信息会发生变化。而突然停电或瞬时断电,保存 In the process of using microcomputers, sudden power outages or abnormal voltages often give us unpredictable losses. Although a regulated power supply is designed in the microcomputer, the host and the display can be reliably operated in a range of 180 to 240V, but when the voltage is lower than 180V or higher than 240V, it only has to be stopped. If it is used under undervoltage, the data may be damaged because the machine power supply can not supply enough power, the driver and the display cannot work properly, and if used under overpressure, the components in the device are easy to break down or the power consumption is too large. Damage, the output information will change. Sudden power cut or momentary power failure, save