Electric Motor Torque Vs Rpm

Power is calculated by the equation hp torque x rpm 5252 understanding the relationship between the two factors also requires knowing a little about an engine s parts.

Electric motor torque vs rpm.

Figure 1 provides a graphical illustration of these changes. T fl 5252 60 hp 1725 rpm 182 7 lb ft. If an application calls for a slower speed and or higher torque then a gear motor should be considered. Torque and motor selection for centrifugal pumps.

The two factors largely determine the power output of an electric motor. The torque of an electric motor is measured in pounds per force inch or lb in. Typical no load or synchronous speeds for an ac fractional horsepower motor are 1800 or 3600 rpm and 1000 5000 rpm for dc fractional hp motors. A motor s horsepower hp is used as a baseline measure of its capabilities in the field.

That is why the shaft and frame of a 900 rpm motor are usually larger than those of an 1 800 rpm motor of the same hp. I input dc current. V input dc voltage. Power kw torque nm example torque from an electrical motor.

The speed of the motor can be found by using speed measurement devices. The torque of a 60 hp motor rotating at 1725 rpm can be calculated as. As speeds increase the back emf of the motor windings because n. Torque nm speed rpm electric motor speed vs.

T v x i 2 x pi x n rpm 60 n rpm is the speed of the motor. Introduction of a vfd when the speed of an ac motor is controlled by a vfd hp or torque will change depending on the change in frequency. T 750 w 9 549 2000 rpm 3 6 nm example torque from an electrical motor. T rated torque nm p kw rated power kw n r rated rotational speed rpm example electrical motor and braking torque.

The torque output of a motor at its most basic form is the amount of rotating force the motor develops. Here omega ω is equal to 2 x pi x n rpm 60. Hence motor torque t p ω. In other words this is the point of maximum pump speed while powered by this motor.

For calculating torque for dc motor. The torque delivered from an electrical motor producing 0 75 kw 750 w at speed 2000 rpm can be calculated as. For dc motor torque formula. Hp is a combination of torque and speed rpm with 1 hp equal to 550 foot pounds per second or 33 000 foot pounds per.

There s nothing special about 1 rpm since you re asking about torque instead of power.