Electric Motor Rpm Calculator

The torque delivered from an electrical motor producing 0 75 kw 750 w at speed 2000 rpm can be calculated as t 750 w 9 549 2000 rpm 3 6 nm example torque from an electrical motor.

Electric motor rpm calculator.

Calculator of the rotation speed in r p m revolutions per minute of an electric motor from frequency hz and number of poles. For dc motor pf is one. In order to more accurately meausre the prm i suggest that use the professional tool to help. Fla full load amps amount of current drawn when full load torque and horsepower is reached for the motor fla is usually determined in laboratory tests note.

1750 rpm 1000 rpm 3 5 inches d 2 d 2 6 125 inches. Dcac single phaseac three phase enter current in voltage. Choose the motor types. Pulley and speed calculator.

Load adds mechanical resistance. Related mobile apps from the engineering toolbox. Check the circle next to the item you are solving for and enter the remain three items in the spaces provided. For example 50 hz or 60 hz.

Enter the input voltage in volts current in amps speed in rpm and power factor. 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. Rla running load amps current drawn during normal operation of electric motor. V enter current in amps.

For example if your small pulley is 80mm diameter and spins at 1000 rpm and you need to find the second pulley size to spin it at 400 rpm enter pulley1 80 pulley 1 rpm 1000 pulley 2 rpm 400 and. Motor torque changes with the speed. Below product is a great tool to measure the rpm of motors. At no load you have maximum speed and zero torque.

Below is a small calculator that will solve the ratio for you. Write down the rated rpm of your motor. For example 5000 rpm. F supply frequency hz.

In the calculator above fla is rla 25. A handy tool for checking the prm of brushless motors. The motor speed calculator calculates the synchronous motor speed from the following parameters. 1 hp 0 745 kw.

Enter any 3 known values to calculate the 4th if you know any 3 values pulley sizes or rpm and need to calculate the 4th enter the 3 known values and hit calculate to find the missing value. A enter speed in rpm. P number of poles.