目前中学物理实验教学用交直流电机模型功能单一,缺少一种多电刷、双线圈的电机研究平台,即演示电动机工作原理的同时也演示了发电机工作原理,新型交直流双向电机演示仪满足了中学物理实验电机教学的需要,在此平台上测定电机转速、工作电流等数据,可找到影响电机转速的多种因素. At present, the AC/DC motor model used in middle school physics experiment teaching has a single function and lacks a multi-brush and dual-coil motor research platform. This demonstrates the working principle of the motor and also demonstrates the working principle of the generator. The new AC/DC bidirectional motor demonstrator It satisfies the needs of high school physics experiments for motor teaching. On this platform, data such as motor speed and operating current are measured. Various factors affecting the motor speed can be found.