Unipolarmotor 10

In this example, a copper coil is used instead of permanent magnets to build an unipolar motor. The current flows from the axle to the coil and then through the coil. A thin iron ring is used inside the coil to enhance the effect.

The enameled copper wire with a diameter of 0.75 mm was wound twice in parallel (approx. 50 turns) to keep the electrical resistance low.

Starting current for the electric coil: 40A at 10V
Starting current for the counter example at the end of the video: 30A at 5V

Transcript:

0:01 Unipolar motor - The principle of Faraday’s homoplar generator reverse applied as a motor.
0:05 In this example an electric coil is being used instead of permanter magnets
0:18 The coil is surrounded by a thin copper strip
0:29 Slow motion: The coil consists of approximately 50 turns of copper wire with a diameter of 2 x 0.75 mm
0:47 Changing the direction of the current doesn't change the rotation
0:58 This arrangement of the permanent magnets produces a magnetic field similar to that of an electric coil
1:08 Magnetic orientation
1:20 Current flow: When the direction of the current is changed, the orientation of the magnetic field also changes, thus the same direction of rotation
1:30 Erwin Research (slightly disassembled construction)