中学物理实验中有许多是需要动力来实现的。如离心实验、交直流发电机、电机原理说明器等实验只能通过教师手摇动力来完成,给教师讲课带来不便。我积多年的中学物理教学经验,用拖拉机上直流发电机(电滚)改装成直流电动机,再配上合适的直流电原,就成了一套实验用的动力装置。这 Many of the middle school physics experiments require motivation. Experiments such as centrifuge experiments, AC-DC generators, and motor principle demonstrators can only be completed by the teacher’s manual power, which is inconvenient for teachers. I accumulated many years of experience in secondary school physics teaching, using a tractor DC generator (electric roller) converted into a DC motor, coupled with a suitable DC current, it became a set of experimental power devices. This