Ball bearing motor

The ball bearing motor (English ball bearing motor ) is a motor, which only consists of a ball bearing and a voltage source. To the voltage source is connected to the ball bearings, that the current flows through the balls or rollers of ball bearing; the ball bearing has to be added (e.g., by hand ) into the start-up rotation serves first of all. The ball bearing works with DC voltage than with AC voltage, and also water.

The current through the ball bearing is so large that heat the balls significantly and asymmetrically deformed, depending on the direction of rotation, thermal.

The engine has because of its vanishingly small efficiency of any practical application. It is a curiosity that (eg unipolar ) gave rise in the past to many physical attempts at explanation.