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The starting torque and power factor of shaded pole induction motor

The starting torque and power factor of shaded pole induction motor Correct Answer Low, low

  • The power losses are very high in the shaded pole induction motor
  • The power factor of the motor is low
  • The starting torque induces in the induction motor are also very low
  • The efficiency is also very low


Important Point:

  • The shaded pole induction motor is simply a self-starting single-phase induction motor whose one of the poles is shaded by the copper ring
  • The copper ring is also called the shaded ring
  • This copper ring act as a secondary winding for the motor
  • The shaded pole motor rotates only in one particular direction, and the reverse movement of the motor is not possible
  • The direction of rotation of the magnetic field is from nonshaded pole to shaded pole

Related Questions

In the following question, sentences of a paragraph have been jumbled and labelled as A, B, C and D. You are required to rearrange the jumbled sentences of the paragraph and mark your response accordingly by selecting the correct option. A: An induction motor can, therefore, be made without electrical connections to the rotor. B: Three-phase squirrel-cage induction motors are widely used as industrial drives because they are self-starting, reliable and economical. C: An induction motor's rotor can be either wound type or squirrel-cage type. D: An induction motor or asynchronous motor is an AC electric motor in which the electric current in the rotor needed to produce torque is obtained by electromagnetic induction from the magnetic field of the stator winding.
Which of the following are the qualities of the starting torque and power factor of a shaded pole single-phase induction motor?
A 10 kW, 400 V, 3-phase, 4-pole, 50 Hz induction motor develops the rated output at rated voltage with its slip rings shorted. The maximum torque is twice the full load torque occurs at the slip of 10% with zero external resistance in the rotor circuit. An external resistance is now tripled in the rotor circuit. Then the slip at which maximum torque occur for the same load torque is?
For a three phase induction motor, maximum torque is double the full load torque and starting torque is 1.6 times the full load torque. To get a full load slip of 5%, percentage reduction in the rotor resistance should be?
While starting a salient pole synchronous motor by induction motor action and connecting field discharge resistance across field, starting and accelerting torque is produced by
A 3-phase induction motor has a starting torque of 200 N-m when switched on-directly to supply. If an auto-transformer with 50% tapping is used for starting, the starting torque would be
A 3-phase, 4-pole, 50 Hz induction motor is uses DOL method of starting. It is later replaced by reactance method of starting with a fraction of ‘x’, then the starting torque reduces by?
A 3-phase, 4-pole, 50 Hz induction motor is uses DOL method of starting. It is later replaced by auto transformer method of starting with a tapping ratio of ‘x’, then the starting torque will be?
What is the range of the starting torque of shaded pole induction motor?
Two poles X and Y stand 3√2 m apart, such that the angle of elevation of the top of pole X as observed from the foot of pole Y is 30° and the angle of elevation of the top of pole Y as observed from the top of pole X is 60°. What is the angle of elevation of the top of pole Y from the foot of pole X?