电磁感应与磁悬浮实验的教学研究

Study on teaching of electromagnetic induction and magnetic levitation experiments

介绍了电磁感应与磁悬浮实验的原理,利用步进电机、转盘、磁铁、力传感器及光耦等组建了电磁感应系统,测量了悬浮力及磁牵引力与铝盘转速的关系,演示了电磁感应的产生条件及其现象,加深了学生对电磁感应现象及电磁感应定律的理解.

The experimental principles of electromagnetic induction and magnetic levitation experi- ments were introduced, and the instrument of electromagnetic induction was composed by the stepping motor, turntable, magnet, force sensor, photoelectric coupler, and so on. Using the instrument, the relationships among levitation force, magnetic pull and aluminum plate rotation speed were measured. The condition and phenomenon of occurring electromagnetic induction were showed. The comprehen- sibility to electromagnetic induction phenomena and electromagnetic induction law for the students was enhanced.