由于电磁继电器的结构比较复杂,原理也比较繁琐,应用又灵活广泛,考试中不少涉及电磁继电器的习题思维灵活,难度较大,很多同学感到难以把握,因此笔者尝试对涉及电磁继电器的常见习题进行简单分类,对其解题思路、方法进行一个简单的总结,希望对同学们有所裨益. Due to the structure of the electromagnetic relay is more complex, the principle is more cumbersome, flexible and widely used, many of the exams involved in the electromagnetic relay exercises thinking flexible, more difficult, many students feel difficult to grasp, so I try to involve the common practice of electromagnetic relays Carry on the simple classification, and carry on a simple summary to the problem-solving ideas and methods in the hope of benefiting the students.