# How is torque calculated on an AC motor?

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To calculate load torque, multiply the force (F) by the distance away from the rotational axis, which is the radius of the pulley (r). If the mass of the load (blue box) is 20 Newtons, and the radius of the pulley is 5 cm away, then the required torque for the application is 20 N x 0.05 m = 1 Nm.

## How is torque calculated in an AC 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 .

## What is torque in AC motor?

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 motor torque formula?

For Calculating, Torque for DC motor. T = V x I / (2 x pi x N(rpm) / 60) N(rpm) is the speed of the motor.

## How do you increase the torque of an AC motor?

The way to increase the torque that the motor delivers, mechanically, would be:

1. To increase the diameter of the wire in the windings (which is to say, completely remanufacture the motor)
2. to have the output shaft coupled to a gear reduction setup, which would lower the final drive rpms, but increase the torque.

## How do you determine torque?

Torque is the twisting force that tends to cause rotation. The point where the object rotates is known as the axis of rotation. Mathematically, torque can be written as T = F * r * sin(theta), and it has units of Newton-meters.

## How do you calculate stall torque?

Ohm’s Law states that current is equal to the supplied voltage divided by the resistance. This would be the starting/stall current. If the motor’s torque constant (Kt) is known you can take Kt* the current and determine the starting/stall torque.

## How do you calculate motor efficiency?

Typical Motor Efficiency Values: Efficiency is simply output (useful) power divided by input power, with the difference being losses due to imperfections in design and other inevitabilities.

## How does torque work in a motor?

That torque is created by the pistons within an engine as they reciprocate up and down on the engine’s crankshaft, causing it to rotate (or twist), continuously. This torque is then transferred to the vehicle’s wheels through the transmission and drivetrain.

## How do you calculate maximum torque of a motor?

Calculate torque (T) using the formula T = 5,252 x horsepower/rpm. The results are measured in pound-feet. For example, if you have a 40-horsepower motor designed to operate at a peak of 1,200 rpm, the formula would be T = (5,252 x 40)/1200 = 175.07 lb. -feet.

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## How do you increase the torque of an AC motor with gears?

You can create a gear ratio that increases its torque by going from smaller gear at motor end to slightly larger gear on load end . This will slow RPM ‘s down on load side but torque will increase . 2:1 ratio is a good start if RPM’s is not issue .

## How much torque does a 1 hp motor have?

The 1800 RPM, 1HP motor produces 3 ft. lbs of torque at 1800 RPM. The 3600 RPM, 1HP motor produces 1.5 ft. lbs.

## Which is better torque at low rpm or torque at high rpm?

Generally it is preferred to have high torque at low RPM. It allows for a better start and a more fun experience in everyday driving. Torque at comparatively higher RPM gives a more powerful mid-range. This means that in the same gear, you accelerate fast.