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简介随着通信事业的发展,目前地、县局采用的通信设备日益增多,对电源也提出了更新的要求。主要是要求能不间断地供电,以确保通信畅通,并且要求电源设备种类简化,以减少投资、便于维护。因此,现在多使用逆变器组成不停电电源,即用某一种电压的蓄电池组,将直流电经过逆变器转变为50周交流电源,再根据需要直接使用或整流成各种直流电源。在有市电时,使用充电整流器对蓄电池组充电,市电中断时,通过转换开关由逆变器代替市电向通信设备供电,以组成不停电供电系统,如图1所示。
INTRODUCTION With the development of communications, the communications equipment used by the county bureau is increasing day by day, and newer requirements are also raised for the power supply. Mainly requires continuous power supply to ensure smooth communication, and requires simplified types of power equipment to reduce investment and ease of maintenance. Therefore, the inverter is now used to make up the uninterruptible power supply, that is, with a certain voltage of the battery pack, the DC through the inverter into 50 weeks AC power, and then directly used or rectified into a variety of DC power. When there is mains, the battery charger is charged by using the charging rectifier. When the mains is interrupted, the mains supply is replaced by the inverter by the inverter instead of the mains to form a non-stop power supply system, as shown in FIG. 1.