Design of a high-performance mine-used intrinsically safe power supply
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摘要: 针对目前本质安全型电源电磁抗扰性差、带载能力弱等问题,设计了一种高性能矿用本质安全型电源。该电源基于准谐振反激式开关电源和双重过压、过流保护设计,可将AC85~250 V宽输入电压转换为稳定的DC12 V/2 A输出。测试结果表明,该电源纹波小,效率高,电磁抗扰性强,符合GB 3836.4—2010《爆炸性环境 第4部分:由本质安全型“i”保护的设备》中本质安全性能要求。Abstract: For problems of poor electromagnetic immunity and weak load capacity of current intrinsically safe power supply, a high-performance mine-used intrinsically safe power supply was designed. The power supply is based on quasi-resonant flyback switching power supply and dual overvoltage and overcurrent protection, which can convert AC85-250 V wide input voltage into stable DC12 V/2 A output. The test results show that the power supply has small ripple, high efficiency and strong electromagnetic immunity, which meets intrinsic safety performance requirements of GB 3836.4-2010 Explosive Atmospheres Part 4: Equipment Protection by Intrinsic Safety "i".
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