Can we use VFD for slip ring motor?

Yes ,the slip ring motor can be operated through VFD. The rotor winding end connections of the slip ring motor can be short shorted at the slip ring. Now the motor behaves as a squirrel cage induction motor.

How do you control the speed of a slip ring motor?

There are two mechanisms to control speed, the first is through rotor rheostat control and the second is through cascade control. The objective of speed control can be achieved through the rheostat which in the first place is used to induce resistance in the system and set up the starting phase for motor slip ring.

What’s 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.

What are the advantages of slip ring induction motor over squirrel cage?

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.

How can we change the speed of squirrel cage and slip ring induction motors?

The interaction of the magnetic fields produced by the stator and rotor windings produces a torque on the squirrel cage rotor. One big advantage of a squirrel cage motor is how easily you can change its speed-torque characteristics. This can be done by simply adjusting the shape of the bars in the rotor.

What is the difference between squirrel cage and slip ring induction motor?

Can induction motor run at synchronous speed?

The Induction Motor cannot run at Synchronous speed because the Slip is never zero in an Induction Motor.

What is the difference between slip ring and squirrel cage 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. Slip-ring motor has smooth acceleration under heavy loads as compare to the squirrel cage motor.