What do motor specs mean?
What do motor specs mean?
It is an indication of how much of the input electrical energy is converted to output mechanical energy. The nominal efficiency of the motor in Fig. 1 is 93.6%. A 30-hp motor with a 93.6% efficiency would consume less energy than a 30-hp motor with an efficiency rating of 83.0%.
What do the numbers on an electric motor mean?
Generally, the first two numbers indicate the diameter of the entire can of the motor OR the diameter of the stator (the inner part of the motor) only. Similarly, the second pair of numbers can indicate either the height of the entire motor, or only the height of the stator.
What does motor code mean?
Codes are defined in MG 1-10.37. 2 by a series of letters from A to V. Generally, the farther the code letter from A, the higher the inrush current per hp. A replacement motor with a “higher” code may require different upstream electrical equipment, such as motor starters.
How do you calculate the horsepower of an electric motor?
Use this formula to estimate motor horsepower. Horsepower(hp)= Voltage x Amperage x % EFF x power factor x 1.73/746.
How is motor rating calculated?
Multiply the motor voltage by the full-load current. The result is in watts. Divide watts by 1,000 to give kilowatts. For example, 230 volts x 20 amps = 4,600 watts; 4,600 watts divided by 1000 = 4.6 kilowatts.
What is the rating of a motor?
For an electric motor, one horsepower is equivalent to 746 watts of electrical power and is the standard rating in the United States. In Europe, the kilowatt rating of a motor has become standard. 1HP = 746 watts. A motor of 100HP will produce 74.6kW of electrical power.
What is kW rating of motor?
Motor is rated in kW since it specifies the capacity of the motor to drive its load. It is the active power (kW) that is of interest when a motor drives a load. The motor converts the active power that it draws from the mains into mechanical power that the load consumes/demands.
What does motor capacity mean?
Quick Reference. The genetically determined maximum potential of an individual to succeed in the performance of a motor skill. Motor capacity is believed to be little influenced by the environment or learning. See also motor ability, motor fitness, physical fitness, motor educatability.
What can an electric motor be used for?
a machine that converts electrical energy into mechanical energy. The electric motor is a basic type of motor used in industry, transportation, homes, and elsewhere. Electric motors can be classified by the kind of current used for their drive.
What size electric motor do I Need?
The top sizes range from 50w-750w for class 1-3 and over 750w for anything class 4 and above. The bigger the engine size, the more power the engine will have to get you over the top of hills. If you weigh over 200lbs, you need at least a 350 W motor for your electric bike.
What is the RPM of an electric motor?
A two “pole” synchronous motors will run at 3600 RPM; where as a two pole squirrel cage will rotate at about 3450 RPM. Different electric motor manufactures allow slightly different amounts of slip. As the number of poles within a motor increase, the speed of the motor will decrease.
What is the purpose of an electric motor?
Electric motor bearings. The purpose of a bearing in an electric motor is to support and locate the rotor, to keep the air gap small and consistent and transfer the loads from the shaft to the motor. The bearings should be able to operate at low and high speeds whilst minimizing frictional loses.