Lecture - D C Motors
DC Motor Operation , Current in DC Motor , Magnetic Field in DC Motor , Force in DC Motor
Lecture - DC Motor 2
Torque in DC Motor , DC motor behavior
Lecture - DC Motor 3
DC Motor Parameterizing DC motor performance
Basic DC Motors
Principles of operation
In any electric motor, operation is based on simple electromagnetism. A current-carrying conductor generates a magnetic field; when this is then placed in an external magnetic field, it will experience a force proportional to the current in the conductor, and to the strength of the external magnetic field. As you are well aware of from playing with magnets as a kid, opposite (North and South) polarities attract, while like polarities (North and North, South and South) repel. The internal configuration of a DC motor is designed to harness the magnetic interaction between a current-carrying conductor and an external magnetic field to generate rotational motion.
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Basic Dc Electrical Motor Construction
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