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How DC motors and universal motors work- great video and explanation, its amazing how universal motors work with both ac and dc..its like bringing two rivals Edison and Tesla together in harmony!! lets pulse that armature and collect the back emf for charging another battery with its radiant energy!!
- bravissimo , bel video . complimenti.
- nice vid. thx 👍
- I concur!
- Thanks for making this video, very clear explanation!
- Nice explanation. Thanks 
- This is really well explained Matthias, thank you and great job.
- wow ! what amazing tools I.ll try to make it. and it's very useful
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- Cool video! You made the lesson extremely interesting. I'm working on making an electric trike (no welding) and stumbled on your video. Now I'm torn between a drill powered trike or a electric scooter motor (350-500W)! That's a good thing as you have provided me with alternatives.
- Very good explanation
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- excellent video... I just repaired the trim motor that controls the outboard motor on my boat... this helped me to understand what the hell I was cleaning up... brushes, springs, commutators, stators.... you rock!
- Is it possible to create instability in the magnetic field without outside forces?
- Very simple but greatly developed explanation. :)
- 6.30 shows the stator but there is a strange looking piece of what seems to be thick metal wire attached to it's thin steel laminations .... i have seen this before in some special transformers as well as some motors and when i removed it (destroyed it) it seemed to be like lead or some other metal which is very soft and easy to bend ... what is that and what is its purpose ? 
- Buen video. +1
- I ve watched many of your videos and I have made furniture out of your plans. You are a gifted teacher.
- you're a great  x)
- nice work