How do I test a DC power supply?

February 14, 2025common problems 3740

测试直流电源有好几种方法，这里我们只介绍几种常用方法。

导通测试：您可以使用万用表的导通模式来完成此项测试。用万用表表笔接触电源的正极和负极。如果是导通的，万用表将会发出提示音。这项测试旨在确定电源是否正在供电以及接线中是否存在断点。

电压测试：您可以使用万用表的直流电压模式来完成此项测试。用万用表表笔接触电源的正极和负极。万用表应当显示电源输出的电压。对比该电压与电源的额定电压，确定其在正确的范围内。

负载测试：您可以将负载（如灯泡或电机）连接到电源，然后用万用表测量电压和电流。电压应当保持稳定，且处在预期范围之内；电流应当在电源的额定电流范围内。

纹波测试：您可以测量电源输出电压的交流分量。将示波器连接到电源的输出端子并测量电压纹波。纹波电压应尽量低，并且在可接受的范围内。

请务必按照操作手册和安全指南的规定谨慎测试电源。如果您对电子测试不熟悉，最好咨询专业人士或使用事先构建好的测试设备。

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How do I test a DC power supply?

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