In which motor is pole changing method of speed control is used?
Pole Changing Method is one of the main methods of the speed control of an induction motor. This method of controlling the speed by pole changing is used mainly for cage motor only because the cage rotor automatically develops a number of poles, which is equal to the poles of the stator winding.
In which motor is the pole changing?
A Dahlander motor (also known as a pole changing motor, dual- or two speed-motor) is a type of multispeed induction motor, in which the speed of the motor is varied by altering the number of poles; this is achieved by altering the wiring connections inside the motor.
What will happen if we increase the air gap in the induction motor?
If the air gap of an induction motor increases, 1) The permeability of the magnetic circuit rotor-to-stator will decrease. … 4) The magnetic flux in the air gap will decrease and leakage fluxes will increase; This will cause a reduction in the maximum available torque.
Which motor is preferred for quick speed reversal?
For quick speed reversal the motor preferred is. dc motor. squirrel cage induction motor. slip-ring induction motor.
How does a 2 speed motor work?
Two Speed, Two Winding
The two winding motor is made in such a manner that it is really two motors wound into one stator. One winding, when energized, gives one of the speeds. When the second winding is energized, the motor takes on the speed that is determined by the second winding.