Back EMF Explained with DC Motors – Why Current Drops When Motors Spin and Increases When it Stops
3:00
YouTubeScott Hadzik
Back EMF Explained with DC Motors – Why Current Drops When Motors Spin and Increases When it Stops
In this video, we demonstrate how back electromotive force (back EMF) affects current draw in brushed DC motors. Using four identical motors with different fan loads, we calculate expected current based on motor resistance, then measure real-time current draw in operation. Watch what happens when we stop one motor and see current spike ...
7.4K viewsJun 4, 2025
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