What are the main advantage and disadvantage of a cage motor?
Squirrel Cage Induction motors are cheaper in cost compared to Slip Ring Induction motors. Requires less maintenance and rugged construction. Because of the absence of slip rings, brushes maintenance duration and cost associated with the wear and tear of brushes are minimized.
What are the disadvantages of squirrel cage induction motor?
Disadvantages of squirrel cage induction motor :
- Poor starting torque.
- High starting current.
- Speed control is not possible in a squirrel cage induction motor., in short, no speed regulation.
- Sensitive to change in supply voltage.
- More sensitive to the supply voltage regulation fluctuations.
What are the advantages of double squirrel cage induction motor?
Since effective rotor resistance of double cage motor is higher, there is larger rotor heating at the time of starting as compared to that of single cage rotor. The high resistance of the outer cage increases the resistance of double cage motor, so full load copper losses are increased, and efficiency is decreased.
What is the function of squirrel cage?
A synchronous motor may have a squirrel-cage winding embedded in its rotor, used to increase the motor starting torque and so decrease the time to accelerate to synchronous speed. The squirrel cage winding of a synchronous machine will generally be smaller than for an induction machine of similar rating.
Where are squirrel cage motor used?
These motors are commonly used in: Centrifugal pumps. Industrial drives (e.g. to run conveyor belts) Large blowers and fans.
What are advantages of slip ring over squirrel cage rotor?
Slip ring induction motor have big advantage of having high starting torque compared to squirrel cage motor. Therefore slip ring induction motors are generally employed where load requires high starting torque or good speed control.
Where are squirrel cage motors used?
What are the advantages of phase wound induction motor over squirrel cage induction motor?
The wound-rotor motors have the following advantages over the squirrel cage motors : (i) High starting torque and low starting current. (ii) Smooth acceleration under heavy load. (iii) No abnormal heating during starting.
Which of the following is the advantage of double squirrel?
Right Answer is: D The high resistance of the outer cage increases the resistance of double cage motor, so full load copper losses are increased, and efficiency is decreased.
What are the advantages of cage motor?
Advantages of Squirrel Cage Induction Motor
- They are low cost.
- Require less maintenance (as there are no slip rings or brushes)
- Good speed regulation (they are able to maintain a constant speed)
- High efficiency in converting electrical energy to mechanical energy (while running, not during startup)
What is a squirrel cage motor and how does it work?
Squirrel cage motors maximize electromagnetic induction by utilizing rotor bars to interact with the stator’s EMF. The stator usually contains windings of wire which carry an AC current; this current changes in sync with a sinusoidal curve (or “alternates”), which changes the current direction in the wire windings.
Why is it called squirrel cage?
Squirrel cage motors are a subclass of induction motors, which harness electromagnetism to generate motion. They are so-called “squirrel cage” motors because the shape of their rotor – the inner component connected to the output shaft – looks like a cage.