13 Advantages of Disadvantages of Slip Ring Induction Motor

In an earlier article, we studied the advantages and disadvantages of squirrel cage induction motors with basic specifications. It performs a major role in industrial and commercial applications.

But, it has some drawbacks. Everywhere is not comfortable for working.

So, here I am describing another type of induction motor i.e. slip ring induction motor with its advantages and disadvantages.

Why is a slip-ring induction motor preferred over a squirrel cage induction motor?

The slip ring induction motor provides smooth acceleration as compared to the squirrel cage induction motor.
The slip-ring induction motor has a better ability to easily regulate the speed.
This motor provides high starting torque.
And it has less starting current that provides flexibility for the operation of heavy-load applications.
The main pros of this motor is to increase starting torque by providing external resistance in the rotor circuit.
This is very convenient and essential where motors or drives (for example cranes, elevators, hoists, conveyors, centrifugal pumps, etc.) required high starting torque.
It performs good operation and speed regulation in traction applications.

The construction of a slip-ring induction motor is quite difficult due to the presence of additional equipment (like brushes, slip rings, short-circuiting devices, etc).
It is more expensive over the squirrel cage induction motor.
For starting slip ring induction motor, this motor requires additional support (i.e. rotor resistance starter).
More copper losses are found in this motor.
The efficiency and power factor are less than the squirrel cage induction motor. So, it is rarely used in industries.
The maintenance is high due to connecting the external power circuit.

These 13 are the basic pros and cons of slip-ring induction motors over squirrel cage induction motors.

If you have any queries or points to add, you can comment below.

Thanks for Reading!

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