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How to make a Homopolar Motor

homopolar motor

How to make a Homopolar Motor

homopolar motor

A homopolar motor is a simple electric motor with two magnetic poles. They were first invented in the 1800s and have no significant practical application today, but can be useful for the demonstration or understanding of how electrical currents and motors work. Building your own homopolar motor is fun and easy, but does require caution.

How It Works :

The homopolar motor is driven by the Lorentz force. A conductor with a current flowing through it when placed in a magnetic field which is perpendicular to the current feels a force in the direction perpendicular to both the magnetic field and the current. This force provides a torque around the axis of rotation. Because the axis of rotation is parallel to the magnetic field, and the opposing magnetic fields do not change polarity, no commutation is required for the conductor to keep turning. This simplicity is most readily achieved with single turn designs, which makes homopolar motors unsuitable for most practical applications.

Like most electro-mechanical machines, a homopolar motor is reversible.

Parts That You Need :
  • Neodymium Magnet
  • AA battery
  • A spool of thin gauged copper wire

Now how to use this parts to make this, watch video:

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