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Why is the starting torque of a wound -rotor motor higher per ampere of starting current than that of a squirrel cage motor?
The starting torque of a wound-rotor motor is higher per ampere of starting current than that of a squirrel cage motor due to the ability to control the rotor resistance. In a wound-rotor motor, external resistance can be added to the rotor circuit, allowing for increased torque production during startup without drawing excessive current. In contrast, squirrel cage motors have a fixed rotor resistance, which limits their starting torque and results in a relatively lower torque per ampere of starting current. This design feature enables wound-rotor motors to provide better performance in high-torque applications.
Why ac motors are not used in railways?
Ac motor has a low starting torque so that DC series motor used in railways cause DC motor has high starting torque
Which of the following Dc motor is suitable for high starting torque?
capacitor start motor
How is pull out torque developed?
With some motor designs, as the motor starts to accelerate, its torque tends to fall somewhat before starting to increase again. The point of lowest torque in this region of the curve is termed the 'pull-up torque'.
How many times greater is the starting torque than the normal full-load torque for split phase motor?
4 times
What is starting torque?
The torque which is produced during the starting of motor is simply called as starting torque.
What are the advantages of induction motor?
1. Induction motor has high starting torque, therefore use for operate pump which need high starting torque. 2. Induction motor operate on variable speed. 3. It can be used as generator when speed of motor is higher than synchronous speed.
Why is the starting torque of a wound -rotor motor higher per ampere of starting current than that of a squirrel cage motor?
The starting torque of a wound-rotor motor is higher per ampere of starting current than that of a squirrel cage motor due to the ability to control the rotor resistance. In a wound-rotor motor, external resistance can be added to the rotor circuit, allowing for increased torque production during startup without drawing excessive current. In contrast, squirrel cage motors have a fixed rotor resistance, which limits their starting torque and results in a relatively lower torque per ampere of starting current. This design feature enables wound-rotor motors to provide better performance in high-torque applications.
In what sense dc motor is better than ac motor?
DC motors can spin at a much faster speed and have higher starting torque.
Why ac motors are not used in railways?
Ac motor has a low starting torque so that DC series motor used in railways cause DC motor has high starting torque
Which of the following Dc motor is suitable for high starting torque?
capacitor start motor
What is full staring torque?
Full staring torque, often referred to as "starting torque," is the maximum torque produced by an electric motor when it starts from rest. This torque is crucial for overcoming inertia and initiating the motion of the motor's load. It is typically higher in motors designed for applications requiring a significant initial force, such as in elevators or conveyor systems. Understanding the full staring torque is essential for selecting the appropriate motor for specific applications to ensure efficient operation.
Does a 4 hp motor have better starting torque than a 12 amp motor?
YES
Why single phase motor has low starting torque.?
The starting torque is low because this type of motor requires an additional way of ensuring that it starts rotating the right way. It is not economical to give this additional mechanism the capacity to deliver the full load torque.
How is pull out torque developed?
With some motor designs, as the motor starts to accelerate, its torque tends to fall somewhat before starting to increase again. The point of lowest torque in this region of the curve is termed the 'pull-up torque'.
How is the full load current different to the starting current- is the full load current higher or lower than the starting current?
While starting a motor from standstill to its rated speed, the motor has to overcome the inertia and generate enough torque to over come it. In the process the motor takes higher current during the starting. Once started and set in motion the current reduces ti its normal value. Full load current is lower than the starting current normally.
What happens to a shunt motor when the starting torque required is too high at start-up?
If the starting torque required is too high for a shunt motor, it could lead to stalling or jerky operation at startup. This can cause overheating and damage to the motor windings due to increased current draw. It is important to match the motor's torque capabilities with the load requirements to prevent these issues.
