摘要
电动机是电气和电工技术课程中的教学难点,主要在于异步电机转动原理中,磁场的分布及旋转是一个较为抽象的概念。根据定子合成磁场的形状特点,利用PPT动画的陀螺旋功能,可分步演示磁场方向随电流相位的变化,从而化解难点;多次交替使用陀螺旋,还可演示电机转子随旋转磁场的异步转动过程;把给定形状的复件与原形状组合,可改变复合组件陀螺旋的旋转重心,以满足旋转点与其他图形的配合需要。
Electic motor is a difficulty in teaching electromechanics and electrotechnics. It’s because magnetic field distribution and rotation is an abstract concept in the principle of motor rotation. According to characteristics of resultant magnetic field distribution of stator space, using of top spiral function which is used to make animation of PPT, we can demonstrate variation of magnetic field direction with current phase step by step, and resolve the difficulty. Furthermore, alternate using top spiral, we can also demonstrate asynchronous rotation of the rotor with rotating magnetic field. Putting original shape with it’s copy together, we can change the center of rotation of the top spiral of the compound component, so as to make the center of rotation and other shapes cooperate.
作者
郭强
宋晓炜
李春雷
杨蕾
GUO Qiang;SONG Xiaowei;LI Chunlei;YANG Lei
出处
《中国教育技术装备》
2020年第18期75-77,81,共4页
China Educational Technology & Equipment
基金
:2018年河南省高等学校合格基层教学组织建设“中原工学院通信工程系”(项目编号:教高(2018)1058号)
2019年河南省高等学校“通信原理”精品在线开放课程项目(项目编号:教高(2019)671号)。
关键词
异步电机
旋转磁场
动画
陀螺旋
asynchronous machine
rotating magnetic field
top spiral
