What is single cage rotor?
As compare to double cage rotor, the single cage has less starting torque so at starting less heating loss occur. A double cage motor develops higher starting torque for low starting current and its rotor heating loss is more. 2. Full-load performance. Full load slip is higher than double cage rotor.
What is a squirrel cage type rotor?
A squirrel-cage rotor is the rotating part of the common squirrel-cage induction motor. It consists of a cylinder of steel laminations, with aluminum or copper conductors embedded in its surface.
How does a squirrel cage rotor work?
Squirrel cage motors are a subclass of induction motors, which harness electromagnetism to generate motion. The AC current passed through the stator creates an EMF that fluctuates with the AC frequency, which “rotates” around the rotor, inducing opposing magnetic fields in the rotor bars, thus causing motion.
How is a squirrel cage rotor constructed?
The entire rotor core is placed in a mould and the rotor bars & end-rings are cast into one piece. The metal commonly used is aluminium alloy. Some very small rotors which operate on the basis of eddy current, have their rotor as solid steel without any conductors.
What is squirrel cage winding?
[′skwərl ¦kāj ‚wīnd·iŋ] (electricity) A permanently short-circuited winding, usually uninsulated, around the periphery of the rotor and joined by continuous end rings. Also known as squirrel-cage rotor.
What is the difference between squirrel cage and slip ring induction motor?
The slip ring induction motors have high starting torque with low starting current whereas squirrel cage motors have low starting torque and high starting current. The operation of slip ring induction motor is more sensitive to the fluctuations in supply voltage as compared to the squirrel cage motor.
Does squirrel cage rotor have winding?
rotor winding is of the squirrel-cage type where solid conductors in the slots are shorted together at each end of the rotor iron by conducting end rings. In such machines there is no need to insulate the conductors from the iron. For motors up to about 300 kilowatts, the squirrel…
What is a deep bar squirrel cage rotor?
The Deep Bar Rotor in an induction motor is used to obtain high rotor resistance at starting and low rotor resistance at the running condition. The figure below shows a deep bar cage rotor with deep and narrow bars: A bar may be assumed to be made up of a number of narrow layers connected in parallel.
What is difference between squirrel cage rotor and wound rotor?
Wound or slip cage rotor This rotor is in the form of bars which are shorted at the end with the help of end rings. This rotor is in the form of 3 phase winding. In squirrel cage rotor no slip rings or brushes. In wound or slip rotor slip rings and brushes are used.
Which is better slip ring or squirrel cage?
The slip ring motor has brushes for transferring the power whereas the squirrel cage motor is brushless. The copper loss in the phase wound motor is high as compared to squirrel cage motor. The efficiency of the slip ring motor is low whereas the squirrel cage motor has high efficiency.
Which is better squirrel cage or slip ring?
What kind of rotor does a squirrel cage use?
In motor rating up to 100 kW, the squirrel cage rotor is made up from the aluminum cast. In this type of rotor, conductor bars and end rings are permanently short-circuited so we can’t connect any external resistance in rotor circuit for starting purpose.
How did the squirrel cage motor get its name?
The reason behind the name “squirrel cage” is because of the type of rotor used in these motors. In these type of motors, the rotor is simplest and most rugged in construction.
Which is better, a squirrel cage or a slip ring motor?
While slip ring induction motors (also known as wound-rotor motor) aren’t as popular as squirrel cage induction motors, they do have a few advantages. Below is a comparison table of squirrel cage vs wound rotor type motors:
How does a squirrel cage induction motor work?
Thus, the rotor will feel the torque that rotates the rotor in the direction of the rotating magnetic flux. In squirrel cage induction motor starting torque is very low. The speed of the rotor will depend on the AC power, and the speed can be controlled by changing the input supply power.