矿用本质安全型电源设计分析

针对本质安全型电源必须要有多重过流、过压保护的要求,介绍了一种基于LM317稳压器的矿用本质安全型电源电路工作原理,分析了该电路中熔断器、滤波电容、稳压器的设计要求,详细介绍了过流及短路保护电路和过压保护电路的参数计算方法。该电源电路中的过流及过压双重保护设计可为技术人员设计合理、可靠的本质安全型电源提供参考。

Design analysis of mine-used intrinsic safety power supply

In view of requirements that intrinsic safety power supply must has multi-protection of overcurrent and over-voltage,the paper introduced working principle of a circuit of mine-used intrinsic safety power supply based on LM317regulator,analyzed design requirements of fuse,filter capacitor and regulator in the circuit,and detailedly introduced calculating method of parameters of circuit of overcurrent and short-circuit protection and circuit of over-voltage protection.The design of double protection of over-current and over-voltage in the circuit of the power supply provides reference for designing reasonable and reliable intrinsic safety power supply.