Working principles of several stepper motors (bipolar, unipolar, reluctance and can stack)

Thanks to d85iDE for proofreading the video script Table Of Contents: 00:05 Introduction 00:24 Bipolar motor, 2 poles, clockwise 05:59 Bipolar motor, 2 poles, counterclockwise 08:02 Bipolar motor, 6 poles, counterclockwise 09:21 Bipolar motor, 6 poles, clockwise 09:40 Bipolar motor, 6 poles, half stepping 13:24 Bipolar motor, 6 poles, 2 phase on excitation 14:28 Coil with center tap 16:00 Unipolar motor with center taps 18:13 Unipolar motor, half stepping 19:02 Variable reluctance motor, 2 poles 22:17 Va