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In a single phase hysteresis motor
- a)starting torque is caused by only eddy current while running torque is caused by only hysteresis.
- b)starting as well as running torques are caused by both eddy current and hysteresis.
- c)starting torque is caused by both eddy current and hysteresis while the running torque is caused by hysteresis.
- d)starting as well as running torques both are caused by only hysteresis.
Correct answer is option 'C'. Can you explain this answer?
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In a single phase hysteresis motora)starting torque is caused by only ...
In a 1-ϕ hysteresis motor, eddy current torque, Teddy ∝ s and hysteresis
torque = constant
During starting, slip is high, therefore torque developed is due to both eddy current and hysteresis. However, during running condition slip is very low due to which eddy current torque will be very less. Therefore, torque is only due to hysteresis during running condition.
torque = constant
During starting, slip is high, therefore torque developed is due to both eddy current and hysteresis. However, during running condition slip is very low due to which eddy current torque will be very less. Therefore, torque is only due to hysteresis during running condition.
Most Upvoted Answer
In a single phase hysteresis motora)starting torque is caused by only ...
Starting torque and running torque are two important characteristics of a hysteresis motor. The correct answer is option 'C' which states that the starting torque is caused by both eddy currents and hysteresis, while the running torque is caused by hysteresis alone.
Hysteresis Motor:
A hysteresis motor is a synchronous motor that operates based on the principle of hysteresis. It consists of a rotor made of a ferromagnetic material and a stator with a rotating magnetic field. The rotor is magnetically oriented and exhibits hysteresis characteristics, which means it retains some magnetism even after the magnetic field is removed.
Starting Torque:
The starting torque is the torque produced by the motor at the instant of starting. In a hysteresis motor, the starting torque is caused by both eddy currents and hysteresis.
1. Eddy Currents:
- When the stator magnetic field rotates, it induces eddy currents in the rotor.
- These eddy currents circulate within the rotor and create their own magnetic field.
- The interaction between the eddy currents and the stator magnetic field produces a torque that helps in initiating the rotation of the rotor.
2. Hysteresis:
- The hysteresis effect in the rotor material causes it to resist changes in the magnetic field.
- As the stator magnetic field rotates, the rotor tries to align itself with the rotating field, but due to hysteresis, there is a time lag in achieving perfect alignment.
- This time lag creates a torque that opposes the rotation of the rotor.
- This opposing torque is responsible for the starting torque of the hysteresis motor.
Running Torque:
The running torque is the torque produced by the motor during continuous operation. In a hysteresis motor, the running torque is caused by hysteresis alone.
- Once the rotor starts rotating, the hysteresis effect continues to play a role in maintaining the torque.
- The rotor tries to align itself with the rotating stator field, but due to hysteresis, there is always a slight misalignment.
- This misalignment creates a torque that keeps the rotor rotating and contributes to the running torque.
Conclusion:
In summary, the starting torque of a hysteresis motor is caused by both eddy currents and hysteresis, while the running torque is primarily caused by hysteresis. The combination of these effects allows the hysteresis motor to provide a smooth start and continuous operation.
Hysteresis Motor:
A hysteresis motor is a synchronous motor that operates based on the principle of hysteresis. It consists of a rotor made of a ferromagnetic material and a stator with a rotating magnetic field. The rotor is magnetically oriented and exhibits hysteresis characteristics, which means it retains some magnetism even after the magnetic field is removed.
Starting Torque:
The starting torque is the torque produced by the motor at the instant of starting. In a hysteresis motor, the starting torque is caused by both eddy currents and hysteresis.
1. Eddy Currents:
- When the stator magnetic field rotates, it induces eddy currents in the rotor.
- These eddy currents circulate within the rotor and create their own magnetic field.
- The interaction between the eddy currents and the stator magnetic field produces a torque that helps in initiating the rotation of the rotor.
2. Hysteresis:
- The hysteresis effect in the rotor material causes it to resist changes in the magnetic field.
- As the stator magnetic field rotates, the rotor tries to align itself with the rotating field, but due to hysteresis, there is a time lag in achieving perfect alignment.
- This time lag creates a torque that opposes the rotation of the rotor.
- This opposing torque is responsible for the starting torque of the hysteresis motor.
Running Torque:
The running torque is the torque produced by the motor during continuous operation. In a hysteresis motor, the running torque is caused by hysteresis alone.
- Once the rotor starts rotating, the hysteresis effect continues to play a role in maintaining the torque.
- The rotor tries to align itself with the rotating stator field, but due to hysteresis, there is always a slight misalignment.
- This misalignment creates a torque that keeps the rotor rotating and contributes to the running torque.
Conclusion:
In summary, the starting torque of a hysteresis motor is caused by both eddy currents and hysteresis, while the running torque is primarily caused by hysteresis. The combination of these effects allows the hysteresis motor to provide a smooth start and continuous operation.
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In a single phase hysteresis motora)starting torque is caused by only eddy current while running torque is caused by only hysteresis.b)starting as well as running torques are caused by both eddy current and hysteresis.c)starting torque is caused by both eddy current and hysteresis while the running torque is caused by hysteresis.d)starting as well as running torques both are caused by only hysteresis.Correct answer is option 'C'. Can you explain this answer?
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In a single phase hysteresis motora)starting torque is caused by only eddy current while running torque is caused by only hysteresis.b)starting as well as running torques are caused by both eddy current and hysteresis.c)starting torque is caused by both eddy current and hysteresis while the running torque is caused by hysteresis.d)starting as well as running torques both are caused by only hysteresis.Correct answer is option 'C'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about In a single phase hysteresis motora)starting torque is caused by only eddy current while running torque is caused by only hysteresis.b)starting as well as running torques are caused by both eddy current and hysteresis.c)starting torque is caused by both eddy current and hysteresis while the running torque is caused by hysteresis.d)starting as well as running torques both are caused by only hysteresis.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a single phase hysteresis motora)starting torque is caused by only eddy current while running torque is caused by only hysteresis.b)starting as well as running torques are caused by both eddy current and hysteresis.c)starting torque is caused by both eddy current and hysteresis while the running torque is caused by hysteresis.d)starting as well as running torques both are caused by only hysteresis.Correct answer is option 'C'. Can you explain this answer?.
In a single phase hysteresis motora)starting torque is caused by only eddy current while running torque is caused by only hysteresis.b)starting as well as running torques are caused by both eddy current and hysteresis.c)starting torque is caused by both eddy current and hysteresis while the running torque is caused by hysteresis.d)starting as well as running torques both are caused by only hysteresis.Correct answer is option 'C'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about In a single phase hysteresis motora)starting torque is caused by only eddy current while running torque is caused by only hysteresis.b)starting as well as running torques are caused by both eddy current and hysteresis.c)starting torque is caused by both eddy current and hysteresis while the running torque is caused by hysteresis.d)starting as well as running torques both are caused by only hysteresis.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a single phase hysteresis motora)starting torque is caused by only eddy current while running torque is caused by only hysteresis.b)starting as well as running torques are caused by both eddy current and hysteresis.c)starting torque is caused by both eddy current and hysteresis while the running torque is caused by hysteresis.d)starting as well as running torques both are caused by only hysteresis.Correct answer is option 'C'. Can you explain this answer?.
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