Effect analysis of adding selective experiments in power electronics course to encourage students' active learning

In order to meet the need for more experimental content for students with strong active learning ability and to solve the problem of students' different needs for experimental content and depth, a teaching method of adding selective experiments is proposed in this study on the basis of basic experiments. The method is also aimed at achieving the need for multi-level teaching. In the experimental course, the teacher arranges all the students in the class and makes them perform the basic circuit experiment. The teacher then adds the selective experiments on the basis of the basic experimental circuit so that the students can freely select the experiment they want to complete and meet the need for expanding the experimental needs of students with strong active learning ability. In this study, the voltage regulating circuit experiment is taken as an example to carry out practical teaching. The basic experimental content is a single-phase voltage regulating circuit experiment, and the selective experiment is a three-phase voltage regulating circuit experiment. The final examination scores of the students who have performed the selective experiments are higher than the average score of the class, which shows that the students who have performed the selective experiments are good students with a strong need for active learning. The curriculum of this study meets their need for active learning. With the help of the realisation rate of the circuit function, the correct answer rate of thinking questions and the experimental time of students who have performed the selective experiments, it is shown that the method of multi-level teaching and differentiated experimental teaching is feasible. Through the questionnaire survey of students, it can be seen that the teaching method proposed in this study can meet the students' need for active learning, improve students' interest in the course, and increase the opportunities for training students' practical ability.