What is a wound rotor induction motor?
A wound rotor motor is a variation of the three-phase induction motor, designed to provide high starting torque for loads with high inertia, while requiring very low current. Wound rotor motors are also referred to as “slip ring motors.”
What is the difference between an induction motor and a wound rotor induction motor?
Wound rotor induction motor is a conventional type of induction motor which has a conventional three-phase winding. This would be made up of insulated wire and it would be usually Y connected. The ends of the winding will be connected to a resistor through a slip ring and brushes.
What is the main advantage of the wound rotor induction motor?
Wound Rotor Induction Motor Qualities Excellent starting torque for high inertia loads. Low starting current compared to squirrel cage induction motor. Speed is the resistance variable over 50% to 100% full speed. Higher maintenance of brushes and slip rings compared to squirrel cage motor.
What is wound rotor induction generator?
Wound rotor induction generator (WRIG): WRIG is similarly connected to a wind turbine as SCIG with the difference that they include the external mechanism to control electrical characteristics or rotor output. The rotor windings can be connected to power electronics or slip rings and brushes.
What is the function of wound rotor?
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. Adjusting the resistance allows control of the speed/torque characteristic of the motor.
Where are wound rotor motors used?
Wound Rotor Induction Motor is used in applications which require smooth start and adjustable speed. Some of the applications of this motor include cranes, mills, hoists and conveyors. Wound rotor induction motor is also used in fans, blowers and mixers. They are used in large pumps in water industry.
What is wound type rotor?
What are the applications of wound rotor motor?
What are the advantages and disadvantages of wound rotor induction motor?
Initial and maintenance cost is more compared to squirrel cage motor because presence of slip rings, brushes, short circuiting devices etc. Speed regulation is poor when operated with external resistances in rotor circuit. Efficiency and power factor of slip ring motor is lower compared to squirrel cage induction motor.
How does a wound motor work?
Why wound rotor is star connected?
That is essentially a delta connection because it is the only way the rotor bars can be connected to form a closed circuit. On the other hand, a wound rotor always has a star connection because that allows the external connection of resistors in series with the winding.
How many types of design of wound rotors are available?
4 types of
Explanation: They are 4 types of design of wound rotors. They are Number of Rotor Slots, Number of Rotor Turns, Area of Rotor Conductors, Rotor Windings.
In which of the following applications wound rotor type of induction motor is used?
2. In which of the following applications, wound rotor type of induction motor is used? Explanation: Only in wound rotor type of induction motor, external resistance can be inserted in series with the rotor winding, for speed and starting torque control.
How do you control the speed of a wound rotor motor?
The speed of the wound rotor or slip ring induction motor can be controlled by varying the resistance in the rotor circuit. This method is applicable to slip ring induction motor only. When the motor is running and if the full resistance is connected in the rotor circuit the speed of the motor decreases.
How does a wound rotor motor start?
Wound-rotor motors can be started with low inrush current, by inserting high resistance into the rotor circuit; as the motor accelerates, the resistance can be decreased.