Electric Motor Torque Formula

For calculating torque for dc motor.

Electric motor torque formula.

T ftlb p hp 5252 n 1b. The formulas and calculations which appear below should be used for estimating purposes only. N revolution per minute rpm alternatively. It is the responsibility of the customer to specify the required motor hp torque and accelerating time for his application.

Motor formulas and calculations. 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. V input dc voltage. T inlb torque in lb f.

Torque in imperial units can be calculated as. 1 ft lb f 1 356 nm. Relationship between torque power and energy. 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.

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. Reduced voltage soft starters. The speed of the motor can be found by using speed measurement devices. Hence motor torque t p ω.

Here omega ω is equal to 2 x pi x n rpm 60. Motor torque changes with the speed. Weight lbs linear velocity ft min speed of driving motor rpm change in speed rpm and time to accelerate total system sec in addition to the torque required to drive the load at a steady speed torque is required to accelerate the load. Reciprocating steam engines and electric motors can start heavy loads from zero rpm without a clutch.

Electrical motor power velocity and torque equations. T inlb p hp 63025 n 1. I input dc current. 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.

T ftlb torque lb f ft. Accelerating torque available motor torque load torque. P hp horsepower delivered by the electric motor hp. Load adds mechanical resistance.

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. 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. For dc motor torque formula. Measuring electric motor torque requires using a formula.