What is Field Weakening?

Definition

A technique to operate a motor above base speed by reducing the magnetic field strength, trading torque for higher speed. Field weakening is used in spindle drives and traction applications requiring an extended speed range.

Related Terms

Base Speed

The rated speed of a motor at which it produces full torque with rated voltage a...

Flux

The magnetic field produced by current flowing through motor windings, measured ...

Vector Control

An advanced AC drive control method that independently regulates motor flux and ...

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