Motor Torque, Voltage, Current and Frequency

You need to contact motor manufacturers, every motor is different. But most manufacturers will supply a torque-speed curve. You would likely need to extrapolate it into a spreadsheet yourself.

But that would be for the motor as a fixed-speed device. With a VFD, the torque remains constant throughout the speed range, that's the primary job of a VFD. Accuracy may suffer at lower speeds based upon what kind of VFD you are using, so that must be determined in advance.

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