Electric Motor Torque Equation

T ftlb torque lb f ft.

Electric motor torque equation.

T ftlb p hp 5252 n 1b. T inlb p hp 63025 n 1. T fl 5252 60 hp 1725 rpm 182 7 lb ft. This developed torque in the motor differs from the actual torque available at the terminals of the motor which is almost equal to the friction and windage.

Torque is nothing but a momentary force developed at the time of force is applied to the motor. Motor torque changes with the speed. At no load you have maximum speed and zero torque. In other words torque t n m is equal to the ratio between the electrical power p w in watts to the acceleration.

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. The torque of a 60 hp motor rotating at 1725 rpm can be calculated as. Torque in imperial units can be calculated as. 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. How to calculate torque of motor. I e φ e 1 we know that transformation ratio k is defined as the ratio of secondary voltage rotor voltage to that of primary voltage stator. The dc motor as we all know is a rotational machine and torque of dc motor is a very important parameter in this concern and it s of utmost importance to understand the torque equation of dc motor for establishing its running characteristics.

Nema national electrical manufacturers association have classified electrical motors in four different designs where torques and starting load inertia are important. Torque equation of dc motor gives the amount and nature of electrical torque t e developed whenever it is taken into service. The torque is also known as electromagnetic torque. Torque equation of an induction motor the developed torque or induced torque equation in a machine is defined as the torque generated by the electric to mechanical power conversion.

The following calculators compute the various torque aspects of motors. One is emf equation and another is torque equation. P hp horsepower delivered by the electric motor hp. N revolution per minute rpm alternatively.

The flux φ produced by the stator is proportional to stator emf e 1. 1 ft lb f 1 356 nm. These equations are for estimation only friction windage and other factors are not taken into consideration. The unit of torque is n m newton meter.

Basically the performance of dc machine centers around two equations. Load adds mechanical resistance. 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. T inlb torque in lb f.