Industrial Engineer · phase 11 of 16
Flux Vector Control
Vector method that independently regulates torque-producing and flux-producing current components for improved dynamic and low-speed performance.
The Explain card
- Plain English
- Flux vector control splits the motor current into the part that makes the magnetic field and the part that makes torque, and controls each one on its own, usually with encoder feedback. The drive then handles the motor like a DC machine.
- Example
- A crane hoist holds a suspended load at zero speed with full torque, then lowers it smoothly. The drive knows the rotor position and commands exactly the torque needed.
- Why it matters
- This is the mode for hoists, positioning, winders and anything that needs precise torque or speed at any point, including standstill. It costs an encoder, careful commissioning and a motor rated for the duty.
- Hook
- Torque and magnetism, each on its own knob.
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.
