设计的过流、过压保护电路，有效地提高了电源的可靠性。
The reliability of power supply is improved by using over-current and over-voltage protecting circuit.
同时给出了整流滤波电路、辅助源电路、过压保护电路、蓄电池的充放电控制电路的电原理图及其工作原理。
Schematic circuits of rectifier and filter, assistant power, over voltage protection, and charge control for storage battery are suggested , their working principle are also discussed.
介绍一款结构简单、成本低廉、新颖实用的输入过压保护电路，实例和实验结果表明了该保护电路的可行性。
This paper presents a novel circuit against input over-voltage. The experiment results are in positive to the feasibility of the protection circuit.
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