针对传统的采用三极管和稳压管进行保护的方案温漂大、保护不精确、批量生产时个体差异大等缺点,提出了一种采用电压基准AZ431和比较器LM339的低成本矿用本安电源电流电压保护电路的设计方案,详细分析了该电路的保护原理。该电路具有简单可靠,调试方便,利于生产等优点。试验表明,该电路能在故障解除后自动恢复,且恢复时间可调。 In view of the shortcomings such as the large temperature drift, the inaccurate protection and large individual differences in mass production, the traditional low-cost mining intrinsically safe power source with voltage reference AZ431 and comparator LM339 is proposed. Current and voltage protection circuit design, a detailed analysis of the protection principle of the circuit. The circuit has the advantages of simple and reliable, easy commissioning, good for production. Experiments show that the circuit can be automatically restored after the fault is removed, and the recovery time is adjustable.