Evaluate Starting Torque and Load Inertia

Torque is the turning force available at the motor shaft. It is especially important during starting, acceleration, and operation under changing loads.
High starting torque may be needed when the motor must:
•    Start a loaded conveyor
•    Accelerate a high-inertia fan or rotating assembly
•    Drive a compressor or pump with significant resistance
•    Overcome static friction in a mechanical system
•    Restart after a short interruption while the system is still loaded
The motor’s starting behavior should be reviewed together with the driven equipment, coupling, gearbox, and control method. A motor that works well at steady speed may still be unsuitable if it cannot start or accelerate the application reliably.

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