Electric Motor Rpm Chart

P hp horsepower delivered by the electric motor hp.

Electric motor rpm chart.

Motors run at a specific revolutions per minute rpm and a speed reducer is needed if you want to keep that motor but have a lower rpm. For example 2 or 4. Check the circle next to the item you are solving for and enter the remain three items in the spaces provided. T ftlb torque lb f ft.

F supply frequency hz. 50hz is the most common frequency outside the us. Hz frequency or cycles sec. If you have any problems with the pulley calculator please email us.

Simply enter the values and click calculate. 1750 rpm 1000 rpm 3 5 inches d 2 d 2 6 125 inches. At no load you have maximum speed and zero torque. For example 50 hz or 60 hz.

Motor torque changes with the speed. Choose the motor types. This simple to use calculator will give you the correct size pulley or motor speed to use if you know the actual or desired information. For dc motor pf is one.

V enter current in amps. Calculating the rpm resulting from a motor and speed reducer assembly requires only basic mathematical knowledge. N revolution per minute rpm alternatively. Rpm shaft rotation speed or revolutions per minute.

Say you want to know what size pulley to use on that old planer to get 3450 rpm you know the motor rpm is 1725 and the pulley on the motor is 6. The motor speed calculator calculates the synchronous motor speed from the following parameters. T inlb p hp 63025 n 1. Dcac single phaseac three phase enter current in voltage.

The motor speed in rpm is calculated as n s 2 cdot 60 cdot dfrac f p. So for example if you have a 4 pole motor on 60 hz then rpm 60 2 4 60 1800 rpm. This can be found on the nameplate of the motor. T inlb torque in lb f.

Poles number of poles of your motor. 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. 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. Enter the input voltage in volts current in amps speed in rpm and power factor.

Electrical motor power velocity and torque equations. Pulley and speed calculator. 1 ft lb f 1 356 nm. 60hz is the most common frequency in the us.

Torque in imperial units can be calculated as. Below is a small calculator that will solve the ratio for you. 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.