It can also be employed for marginal speed control.
Slip ring induction motor rotor resistance.
The resistance of this motor depends upon the slip and independent of the torque.
For slip ring induction motors additional resistance can be coupled in series with the rotor circuit.
Speed control of slip ring induction motor.
It consists laminated cylindrical core which has a semi closed slot at the outer periphery and carries three phase insulated winding.
In this method of speed control the rotor circuit resistance is varied by connecting a variable external resistance.
Name one disadvantage of slip ring induction motor and squirrel cage induction motor.
It has already been stated that this is a common method used to limit the starting current of such machines.
Wound rotor motors can be started with low inrush current by inserting high resistance into the rotor circuit.
Starting of slip ring induction motors.
The motor which employing the wound rotor is known as a slip ring induction motor or phase wound motor.
These motors are usually started with full line voltage applied across its terminals.
This method is not applicable to cage rotor induction motor.
As the motor accelerates.
A motor with a wound type rotor is known as a slip ring induction motor.
The disadvantages are high copper losses and the low torque.
1 by varying external resistance.
As these motors have external resistance connected to its rotor circuit the value of starting current is adjusted or kept minimum by increasing the resistance of the rotor circuit.
A wound rotor motor also known as slip ring rotor motor is a type of induction motor where the rotor windings are connected through slip rings to external resistance.
Also rotor windings are connected through slip rings to external resistance.
We know that a motor uses an external high resistance circuit for producing high starting torque.
Also the slip necessary to generate maximum torque is directly proportional to the rotor resistance.
Definition of slip ring motor.
Rotor resistance control is one among the various methods for the speed control of induction motor.
Rotor resistance control is also one of the methods by which we can control the speed of the induction motor.
In a version of the ac induction motor referred to as a wound rotor motor slip rings are used not for transferring power but for inserting resistance into the rotor windings a wound rotor motor uses three slip rings typically made of copper or a copper alloy mounted to but insulated from the motor shaft.
So by varying resistance after the motor has attained rated speed the slip value can.
What is a slip ring induction motor.
The speed of the wound induction motor can be controlled by connecting an external resistance in the rotor circuit through slip rings.
