Basic Electrical and Electronics Engineering: Unit II: Electrical Machines
Construction and Working Principle of Single Phase Induction Motor
The single phase motors are simple in construction and small in size. These motors have power rating in fractional horse power range.
CONSTRUCTION
AND WORKING PRINCIPLE OF SINGLE PHASE INDUCTION MOTOR
The
single phase motors are simple in construction and small in size. These motors
have power rating in fractional horse power range. They are used in fans,
washing machines, hand tools like drivers, record player, refrigerators, juice
makes etc. The main disadvantages are lack of starting torque, reduced power
factor, low efficiency.
Construction
Single
phase induction motor consists of two parts. One is stationary part which is
called as stator and the other is rotating part which is called as rotor. The
air gap between stator and rotor is uniform. There is no external connection
between stator and rotor.
A
single phase winding would not produce a rotating magnetic field and starting
torque. It is necessary to split the stator winding into two parts. Such that
it will be displaced in space on the stator to make the motor self starting.
Working Principle
When
single phase supply is given to the stator winding, an alternating field is
produced. This alternating field will induce an emf in the rotor conductors by
the principle of mutual induction so the rotor has a closed circuit, current
flowing through the rotor conductors.
Basic Electrical and Electronics Engineering: Unit II: Electrical Machines : Tag: : - Construction and Working Principle of Single Phase Induction Motor
Basic Electrical and Electronics Engineering: Unit II: Electrical Machines
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