Electic Motor Power Curve. The curves in the graphs do not directly apply under these conditions. From these equations, we again find that maximum output power occurs at = ½, and = ½ repectively.
Electric motor output power and torque vs. Η m = p out / p in (1) where.
At Starting, The Power Factor Can Be In The Range Of 10% To 25%, Rising As The Rotor Achieves Speed.power Factor (Pf) Varies Considerably With The Motor Mechanical Load (Figure Below).
Nr = rated rotational speed (rev/min, rpm)
Assuming 60 Hz, We Get 1800 Rpm.
Find out the motor speed.
Apply The Power, Torque, And Velocity Relation:
Images References :
The Constant, 5,252, Is The Result Of Dividing James Watt’s Original Test Data (33,000) By 2 Pi (Π).
Power (p) = speed (n) x torque (m) power:
Assuming 60 Hz, We Get 1800 Rpm.
As the load increases, the real power into the machine must increase, while the reactive power doesn’t change too much.
Recall That Power Is The Product Of Torque And Rotational Speed.