Electric Motor Torque Formula

Motor formulas and calculations.

Electric motor torque formula.

T inlb p hp 63025 n 1. T ftlb p hp 5252 n 1b. Relationship between torque power and energy. 1 ft lb f 1 356 nm.

Electrical energy measured in watts can be used to produce torque and an electric motor is a good example of electrical energy that can produce torque. Electrical motor power velocity and torque equations. Horsepower to torque converter is an online tool used in electrical engineering to calculate how much torque will be generated according to the input power value either in horsepower or watts. I input dc current.

Reduced voltage soft starters are used to limit the start current reducing the locked rotor torque or starting torque and are common in applications which is hard to start or must be handled with care like positive displacement pumps cranes elevators and similar. Accelerating torque available motor torque load torque. Reduced voltage soft starters. The formulas and calculations which appear below should be used for estimating purposes only.

Torque in imperial units can be calculated as. For dc motor torque formula. Hence motor torque t p ω. The speed of the motor can be found by using speed measurement devices.

At no load you have maximum speed and zero torque. In our example input electrical power of the motor is 0 22 a x 6 v 1 32 w output mechanical power is 1000 rpm x 2 x 3 14 x 0 00126 n m 60 0 132 w. T inlb torque in lb f. T ftlb torque lb f ft.

Reciprocating steam engines and electric motors can start heavy loads from zero rpm without a clutch. Generally horsepower is a unit for measuring the power of various electrical motors piston engines steam turbines etc and it is equal to 746 watts or 33 0000 lb ft per. Load adds mechanical resistance. Here omega ω is equal to 2 x pi x n rpm 60.

Measuring electric motor torque requires using a formula. V input dc voltage. Motor torque changes with the speed. Look at the owner s manual of the electric motor or electrical appliance that has an electric motor such as a power screwdriver.

N revolution per minute rpm alternatively. P hp horsepower delivered by the electric motor hp. It is the responsibility of the customer to specify the required motor hp torque and accelerating time for his application. Steam engines and electric motors tend to produce maximum torque close to zero rpm with the torque diminishing as rotational speed rises due to increasing friction and other constraints.