What is a d.c motor ? Obtain an expression for its efficiency.
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Popular DC motor designs include:
Permanent magnet
Brushless
Shunt
Series
Compound wound or stabilized shunt
The basic operation of all these designs is similar. A current-carrying conductor is placed in a magnetic field, and applying power through these conductors causes motor rotation. The difference among the designs is how the electromagnetic fields are generated and where – in either the rotor or stator.
Permanent magnet
Brushless
Shunt
Series
Compound wound or stabilized shunt
The basic operation of all these designs is similar. A current-carrying conductor is placed in a magnetic field, and applying power through these conductors causes motor rotation. The difference among the designs is how the electromagnetic fields are generated and where – in either the rotor or stator.
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Dc motor is any of a class of rotatory electrical machines which converts direct current electrical energy into mechanical energy.
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