一种防雷击浪涌的开关电源电路设计

A design of preventing lightning surge switch switching power supply electrocircuit

随着城市经济的发展,感应雷和雷电波侵入造成的危害也大大增加。一般建筑物上的避雷针只能预防直击雷,强大的电磁场产生的感应雷和脉冲电压还是能潜入室内危及电视、电话及电子仪表等用电设备——特别是太阳能控制仪表。由于太阳能安装位置特殊,其使用稳定性一直是广大研发人员所关注的重点。瞬间高电压的雷击浪涌以及信号系统浪涌是引起仪表稳定性差的重要原因,信号系统浪涌电压的主要来源是感应雷击、电磁干扰(EMC)、无线电干扰和静电干扰。金属物体(如电话线)受到这些干扰信号的影响,会使传输中的数据产生误码,影响传输准确性和传输速率。如何设计防雷电路成为仪表研发的关键问题。

With the city＇s economic development, inductive lightning strike and lightning sensor harm caused by invasive wave is greatly increased. General buildings only to prevent direct lightning,and strong electromagnetic fields produced by Ray and pulse voltage induction into the interior can endanger the television,telephone and electronic instrumentation,such as electrical equipment. Especially the instruments which solar water heater,because of the special circumstances of the installation location,the use of stability make the general development of personnel have been the focus of concern.Instantaneous high-voltage surge and lightning surge signal system are caused by instrumentation of the important reasons for poor stability,the signal system of the main sources of surge voltage sensors are struck by inductive lightning,Electro Magnetic Compatibility （EMC）,radio frequency interference and electrostatic interference.Metal objects （such as telephone lines ） by the impact of these interference signals will transmit the data generated error,affecting the accuracy of transmission and transmission rate.How to design a lightningproof electrocircuit to become a sixty-four-dollar question of instrument＇s investigation.