Torque is the turning force through a radius – with the units Nm in the SI-system and the units lb ft in the imperial system. The torque developed by an asynchronous induction motor varies when the motor accelerates from zero to maximum operating speed.
What is the torque in the motor?
Torque: The torque output of a motor is the amount of rotational force that the motor develops. The torque of a small electric motor is commonly measured in either inch pounds (in-lbs), Newton meters (N-m) or other directly converted units of measure.
How torque is produced in motor?
In magnetic motors, magnetic fields are formed in both the rotor and the stator. The product between these two fields gives rise to a force, and thus a torque on the motor shaft. One, or both, of these fields must change with the rotation of the rotor.
What is torque and RPM?
RPM- Stands for rotations/revolutions per minute. This is a measurement of how fast your engine is rotating. Torque- Torque is a measurement of rotational force. Torque is applied to your wheels which makes them rotate.
What is torque current?
Torque current is the portion of the total current to the motor that is in phase with the output voltage. … The efficiency of any motor will improve if more of the total current is in phase with the output voltage.
How is torque calculated in an induction motor?
Torque of a three phase induction motor is proportional to flux per stator pole, rotor current and the power factor of the rotor. T ∝ ɸ I2 cosɸ2 OR T = k ɸ I2 cosɸ2 .
How does induction motor increase torque?
There are three ways to improve the starting torque of Single phase induction Motor
- Internal Rotor Resistance. The across the line starting torque at low speed can be increased by increasing the rotor resistance. …
- External Rotor Resistance. …
- Variable Voltage/Frequency.
What is maximum torque in induction motor?
Hence, the developed torque is maximum when the rotor resistance per phase is equal to the rotor reactance per phase under running conditions. By putting the value of sX20 = R2 in equation (1) we get the equation for maximum torque.
What is torque simple words?
Torque is a twisting force that speaks to the engine’s rotational force and measures how much of that twisting force is available when an engine exerts itself. Torque is present in everyday happenings, such as operating a doorknob, opening a soda bottle, using a wrench, or pedaling a bicycle.
How is torque calculated?
Torque (also called moment — mostly by engineers) is calculated by multiplying force and distance. The SI units of torque are newton-meters, or N*m (even though these units are the same as Joules, torque isn’t work or energy, so should just be newton-meters).
What is torque vs power?
Torque refers to the capacity to do work, while power is the rate of completing work in a given amount of time. The primary use of torque is to make the car accelerate in the initial stages of movement, while the horsepower determines the rate of the acceleration of the vehicle.
What is an example of torque?
Opening a bottle cap or turning a steering wheel are examples of torque.
What is the difference between speed and torque?
Speed of a motor is the rate at which it spins and is often given in “rpm” or rotations per minute. While torque is the amount of twisting force generated by the motor (often through a shaft).
Is torque a function of current?
For a given motor flux level the torque is a direct function of the current which links the flux. … In a DC machine, the flux is set by the excitation (field) winding current, and the torque is the product of the flux and the armature current.