There are many kinds of electric cars, but because the iron core notch is outward. Manual winding is very convenient. If you transform the motor yourself, you just need to take a few photos with your mobile phone in advance. First take photos of the binding line, then untie the binding line, straighten all the outgoing lines, then take photos, print out the photos, and make some comments on words and lines in important positions, especially the relative positions of the outgoing slot and the three Hall elements must not be mistaken. Then the original coil is removed, and it can be rewound soon with reference to the photo. Generally, it can't be wrong, because the arrangement of the three coils is regular. After winding, you also take photos according to the steps, and then compare with the original picture, and the mistakes are clear at a glance. This is simpler and clearer than watching a video.