Electric Motor Torque Equation

N revolution per minute rpm alternatively.

Electric motor torque equation.

At no load you have maximum speed and zero torque. Torque is nothing but a momentary force developed at the time of force is applied to the motor. Electrical motor power velocity and torque equations. The unit of torque is n m newton meter.

Example electrical motor and braking torque. The torque of a 60 hp motor rotating at 1725 rpm can be calculated as. Motor torque changes with the speed. 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 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. T inlb p hp 63025 n 1. Therefore understanding of torque equation is a must for performance analysis. 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 following calculators compute the various torque aspects of motors. The torque is also known as electromagnetic torque. Nema national electrical manufacturers association have classified electrical motors in four different designs where torques and starting load inertia are important. 1 ft lb f 1 356 nm.

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. How to calculate torque of motor. T inlb torque in lb f. Torque equation of dc motor gives the amount and nature of electrical torque t e developed whenever it is taken into service.

One is emf equation and another is torque equation. T ftlb p hp 5252 n 1b. These equations are for estimation only friction windage and other factors are not taken into consideration. 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.

Basically the performance of dc machine centers around two equations. The flux φ produced by the stator is proportional to stator emf e 1. 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. In other words torque t n m is equal to the ratio between the electrical power p w in watts to the acceleration.

Torque in imperial units can be calculated as. Load adds mechanical resistance. Where t is the torque produced by the induction motor φ is flux responsible for producing induced emf i 2 is rotor current cosθ 2 is the power factor of rotor circuit. 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.