学生电源是实验室常用的教学仪器,使用率相当高,也容易出现故障。为物尽其用,使实验教学能正常进行,因此应经常检查,发现问题,及时维修。学生电源的型号不同,但基本的电原理没有多大区别。出现的故障现象形式多样,但常见的是:不输出、输出电压偏低或偏高、提前过载保护、过载保 Student power is a commonly used teaching instrument in the laboratory. The usage rate is quite high and it is prone to failure. To make the best use of the material, the experiment teaching can be performed normally, so it should be checked frequently, problems found, and timely maintenance. Student power models are different, but the basic electrical principles are not much different. There are various types of fault phenomena, but common ones are: no output, low or high output voltage, early overload protection, overload protection