SSC Exam > SSC Questions > After the starting winding is disconnected f...
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After the starting winding is disconnected from the circuit the motor continues to run only on the-
- a)Squirrel cage winding
- b)Running winding
- c)Magnetic winding
- d)Compensating winding
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
After the starting winding is disconnected from the circuit the motor...
A single-phase motor cannot create a rotating magnetic field. It will just standstill and oscillate. To see this disconnect the start winding and you will see the motor will not startup. If you twist motor shaft with fingers it will run in whichever direction you twist. To self-start a single-phase motor one must create a rotating magnetic field on the stator. Two windings are used and the difference in impedance creates a phase delay in the magnetic fields produced by each winding allowing the motor to start.
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After the starting winding is disconnected from the circuit the motor...
Explanation:
When the starting winding is disconnected from the circuit, the motor continues to run only on the running winding. This is because the running winding is designed to provide the necessary torque to keep the motor running once it has started.
Reasoning:
When an AC induction motor starts, both the starting winding and the running winding are energized. The starting winding is designed with a higher resistance and lower inductance compared to the running winding. This difference in electrical characteristics allows the starting winding to create a rotating magnetic field that helps the motor start.
Once the motor reaches its operating speed, the starting winding is disconnected from the circuit. This is typically done with the help of a centrifugal switch or a relay.
Effect of Disconnecting Starting Winding:
When the starting winding is disconnected, the motor continues to run on the running winding alone. The running winding is designed with a lower resistance and higher inductance, which allows it to carry the current required to maintain the motor's speed.
Role of Running Winding:
The running winding is responsible for producing the rotating magnetic field that interacts with the stator's magnetic field to generate torque. This torque enables the motor to continue running and perform its intended function.
Conclusion:
In summary, when the starting winding is disconnected from the circuit, the motor relies on the running winding to provide the necessary torque to keep it running. The running winding is designed to carry the current required to maintain the motor's speed and generate the torque needed for operation.
When the starting winding is disconnected from the circuit, the motor continues to run only on the running winding. This is because the running winding is designed to provide the necessary torque to keep the motor running once it has started.
Reasoning:
When an AC induction motor starts, both the starting winding and the running winding are energized. The starting winding is designed with a higher resistance and lower inductance compared to the running winding. This difference in electrical characteristics allows the starting winding to create a rotating magnetic field that helps the motor start.
Once the motor reaches its operating speed, the starting winding is disconnected from the circuit. This is typically done with the help of a centrifugal switch or a relay.
Effect of Disconnecting Starting Winding:
When the starting winding is disconnected, the motor continues to run on the running winding alone. The running winding is designed with a lower resistance and higher inductance, which allows it to carry the current required to maintain the motor's speed.
Role of Running Winding:
The running winding is responsible for producing the rotating magnetic field that interacts with the stator's magnetic field to generate torque. This torque enables the motor to continue running and perform its intended function.
Conclusion:
In summary, when the starting winding is disconnected from the circuit, the motor relies on the running winding to provide the necessary torque to keep it running. The running winding is designed to carry the current required to maintain the motor's speed and generate the torque needed for operation.
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After the starting winding is disconnected from the circuit the motor continues to run only on the-a)Squirrel cage windingb)Running windingc)Magnetic windingd)Compensating windingCorrect answer is option 'B'. Can you explain this answer?
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