Question

What is the difference btw induction and electrical motor

Answer 1

• Electric motors require an additional DC power source for energizing rotor winding. Induction motors do not require any additional power source.
• Slip rings and brushes are required in electric motors, but not in Induction motors (except wound type induction motor in which slip ring motors are used to add external resistance to the rotor winding).
• Electric motors require additional starting mechanism to initially rotate the rotor near to the electric speed. No starting mechanism is required in induction motors.
• The power factor of a electric motor can be adjusted to lagging, unity or leading by varying the excitation, whereas, an induction motor always runs at lagging power factor.
• Electric motors are generally more efficient than induction motors.
• Electric motors are costlier.