同名端是变压器理论与实践中常用的基本概念,它的作用是:已知原线圈(输入电压)的交流瞬时极性能够推断出副线圈(输出电压)的交流瞬时极性。同名端的判断在电工和电子技术中特别重要。笔者探索设计了五种实验判定方法,既可以作为课堂演示实验,也可以做为学生分组实验。实验需要的仪器比如可拆变压器、交直流低压电源、多 The same name terminal is the basic concept commonly used in the theory and practice of transformers. Its function is: it is known that the instantaneous polarity of the alternating current of the primary coil (input voltage) can deduce the instantaneous polarity of the alternating current of the secondary coil (output voltage). The judgment of the same name is particularly important in electrician and electronic technology. The author explores and designs five methods of experiment judgment, which can not only be used as classroom demonstration experiment, but also as a group experiment for students. Experimental equipment needed such as detachable transformer, AC and DC low-voltage power supply, and more