【摘要】 为了提高电磁型欠压脱扣器的可靠性,在评估现有设计方案不足的基础上,通过优化主回路结构,提出了一种新的高可靠性电磁型欠压脱扣器设计方案。结合这种新方案,对主回路、单片机电路与电源电路等关键问题进行具体分析与设计。实验表明,本方案具备整体电路自身功耗仅为毫瓦级水平,动作点准确度达±2 V,并兼顾到成本低廉。方案成功通过了1.3倍电网电压老化与4 kV脉冲群考核试验。更多还原

【Abstract】 In order to improve the reliability of electromagnetic type undervoltage release,based on the deficiency analysis of the existing scheme,a new scheme of a reliable electromagnetic undervoltage releaser is proposed by optimizing structure of main circuit. With the new scheme,the specific analysis and design of main circuit,single-chip microcomputer circuit and power circuit are demonstrated. Experiments show that the new scheme has the advantages that the overall power consumption of the new scheme circuit itself is only milliwatts and the accuracy of action point is limited within plus or minus 2 V while the cost is quite low. The scheme has successfully passed the 1. 3 times rated voltage aging test and the 4 kV EFT test.更多还原