DC Motor

A DC current is sent around a wire loop that is free to rotate. The current causes the loop to feel a torque in the presence of a magnetic field. Switching the current when the loop flips over allows it to continue accelerating, demonstrating the principle of a DC motor and the Lorentz force law.

 

Build an Electric Motor

This video demonstrates how to build a simple electric motor. Includes a discussion of some of the science behind electric motors.

 

Induction Motor How it works

This is the basic principle of how induction motors work.

 

Variation of the electric current in a DC motor

The current drawn by a simple motor may vary in time depending on what the motor does at any given instant.

Source:  Horatiu Pop

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Quick Demo: Variation of the electric current in a DC motor from Horatiu Pop on Vimeo.

Motor Effect

When placed in a magnetic field, a current carrying conductor experiences a force.

Source:  Horatiu Pop

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