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Electric Motor Driven Systems: Considerations with Motor Options - Sizing

The characteristics which are important when selecting a motor size include:

1. Mechanical Arrangement, Position of Motor and Shaft, Type of Bearing, Drive Connection
2. Speed Range Desired
3. Power Requirement
4. Torque
5. Inertia
6. Frequency of Starting
7. Service Factor
8. Ventilation Requirements

The following formulas are also helpful when considering sizing:

Horsepower X .746 = Kilowatt
Kilowatt X 1.34 = Horsepower