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Torque is a Force applied at a Moment Arm. Or a force applied to a bar of a set length. Torque is a unit of Foot-pounds. If you have a ratchet wrench that has a 1 foot handle and you use it to torque a Bolt by applying a force of 20 lbs this will produce a 20 ft-lb torque load to the bolt. ( 1 Foot X 20 Lbs). This can be converted to 240 inch-lbs. The torque produced by car engines are also measured in terms of foot-pound of torque. This defines the power that the engine produces at the Shaft. This is convenient to use in calculating how much power is delivered to a car's transmission or wheels to allow the engineer to determine how fast the car will go, etc.

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What is induction motor?

Induction motor is an AC electric motor which uses electromagnetic induction to induce the electric current in the rotor to produce torque.


What will happen to speed-torque characteristics of an induction motor is the rotor resistance is increased?

If Rotor resistance is increased torque is increased


What is the use of double cage rotor in induction motor?

to obtain high starting torque


What three factors determine the amount of torque produced by an AC induction motor?

Torque is produced by a phase difference between two windings. The higher the phase difference, the higher the torque.The rotor rotates slightly slower than the magnetic field produced by the stator (the fixed winding). The difference in speed is called the slip and it allows low-frequency currents to be induced in the rotor and torque to be produced. For a motor rotating just below the synchronous speed, the torque is proportional to the slip which is defined by this, where Nis the actual speed and Ns is the synchronous speed:s = 1 - N/Ns


Performance curve of a single phase induction motor?

The performance curve can be a graph of torque versus speed. The torque is zero at zero speed and also at the synchronous speed. Normally an induction motor operates at 90-97% of the synchronous speed, where the slip is between 10% and 3%. In this region the torque is proportional to the slip. As the torque is increased the speed falls until the motor stalls and the speed drops to zero. Below the stalling speed the torque rises between zero speed and the stalling speed. Because the torque is 0 at 0, a single-phase induction motor needs a separate starting winding fed by a starting capacitor to produce a little positive torque that starts the motor.

Related Questions

What is induction motor?

Induction motor is an AC electric motor which uses electromagnetic induction to induce the electric current in the rotor to produce torque.


What is the maximum torque than an induction motor can develop known as?

Gross Torque


How does an induction motor develop torque?

The shaft of an AC induction motor rotates because of the torque created by the interaction between the magnetic field of the stator and the magnetic field of the rotor.


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.


What is the condition at which torque developed in 3 phase induction motor is maximum?

sadasd


What will happen to speed-torque characteristics of an induction motor is the rotor resistance is increased?

If Rotor resistance is increased torque is increased


Full load torque of induction motor?

The full load torque of an induction motor is the maximum torque it can produce at its rated speed when operating at full load conditions. This torque is necessary to drive the load at the desired speed under normal operating conditions. It is an important parameter to consider when selecting a motor for a specific application.


What is the use of double cage rotor in induction motor?

to obtain high starting torque


What three factors determine the amount of torque produced by an AC induction motor?

Torque is produced by a phase difference between two windings. The higher the phase difference, the higher the torque.The rotor rotates slightly slower than the magnetic field produced by the stator (the fixed winding). The difference in speed is called the slip and it allows low-frequency currents to be induced in the rotor and torque to be produced. For a motor rotating just below the synchronous speed, the torque is proportional to the slip which is defined by this, where Nis the actual speed and Ns is the synchronous speed:s = 1 - N/Ns


What is starting torque?

The torque which is produced during the starting of motor is simply called as starting torque.


What type of motor is used in centrifugal pump?

3 Phase induction motor because it produce high torque at starting


Pull-out torque of induction motor?

The pullout torque is the maximum torque a motor can achieve. Also known as breakdown or peak torque. It occurs at the point where, the increase in the rotor current is exactly balanced by the decrease in the rotor power factor.