成人无码H肉动漫在线观看站,久久久无码精品亚洲日韩京东传媒,欧美特级黄色视频,欧美午夜成人精品视频,午夜性影院在线观看视频播放,99爱精品成人免费观看,一级a一级a免费观看视频,丰满少妇人妻久久久久久,无码人妻AⅤ一区二区三区,一极a做片性视频无码鲁鲁网

The application of varistors in micro motors is mainly to absorb the reverse electromotive force of the motor during commutation. To prevent the commutator poles from generating sparks when the commutator is short-circuited, the surface of the commutator and brushes will be burned due to high temperature, which will affect the service life of the motor and generate electromagnetic waves, which will interfere with the use of other electronic products.