Question
Download Solution PDFWhat type of starter is used in a high rating slip ring induction motor?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDF- Rotor resistance starter is used in a high rating slip ring induction motor
- It uses an external resistance/phase in the rotor circuit so that the rotor will develop a high value of torque.
- High torque is produced at low speeds when the external resistance is at its higher value.
- At the start, supply power is connected to stator through a three-pole contactor and, at the same time, an external rotor resistance is added
- The high resistance limits staring current and allow the motor to start safely against a high load.
- Hence if resistance is inserted in the rotor circuit of a slip ring induction motor, then compared to direct line starting the starting current reduces but starting torque increases.
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