Industrial Engineer · phase 11 of 16
Torque Control
Operating mode in which motor torque is the primary commanded variable or regulated limit.
The Explain card
- Plain English
- In torque control the drive regulates the force the motor produces rather than its speed. The speed becomes whatever the load allows at that torque.
- Example
- A rewinder holds constant tension on a web by commanding constant torque, and the roll speeds up as its diameter shrinks. A speed limit sits above it so a broken web cannot let the motor run away.
- Why it matters
- Tension, pressing, clamping and load sharing between two motors on one shaft are all torque jobs. Torque mode without a speed limit is dangerous, since with no load the motor accelerates until something stops it.
- Hook
- Push this hard, and let the speed fall where it may.
Where it sits in the deck
Phase 11: VFD Control Modes and Tuning
How a drive decides what to send the motor, from plain volts per hertz up to closed loop vector control, and how each mode is tuned.
