Industrial Engineer · phase 11 of 16 · noun
Slip Compensation
Automatic frequency adjustment that reduces induction-motor speed change as load torque changes.
The Explain card
- Plain English
- Slip compensation raises the output frequency slightly as load increases, so the shaft speed stays where the setpoint asked for it. The drive estimates load from current and adds the frequency the slip would have lost.
- Example
- A conveyor set for 1750 rpm slows to 1720 when it is fully loaded in plain V/Hz mode. With slip compensation on, the drive pushes the frequency up by a hertz and the belt holds 1750.
- Why it matters
- It gives open loop drives most of the speed accuracy of a vector drive on steady loads. Set too high it overcompensates and hunts, and on a load that regenerates it can push the wrong way.
- Hook
- Add back what the load takes away.
Word knowledge
How the word is built, where it came from, and what it sits beside in memory.
In a sentence
During commissioning, the technician raises slip compensation until the loaded conveyor motor holds the specified shaft speed.
Why these words
- slip Middle English slippen, from Middle Dutch or Middle Low German names the difference between synchronous field speed and rotor speed
- compensation Latin compensatio, a balancing or counterbalancing names the corrective action applied against that difference
Where it came from
- Origin
- an English engineering compound combining Germanic slip with Latin-derived compensation
- Entered the language
- 20th century
- What changed
- Slip moved from physical sliding to a motor-speed relationship, while compensation broadened from balancing losses to making corrective technical adjustments.
How it is spelled
- Pattern
- Slip doubles its final p before vowel-led inflectional endings.
- Pattern
- Compensation uses the common noun-forming suffix -ation.
Spelled like
- slipped
- slipping
- regulation
- modulation
Broken into chunks
-
slip
- slipped
- slipping
-
compens
- compensate
- compensatory
-
ation
- regulation
- modulation
What it sits beside
Same subject
- motor slip
- synchronous speed
- rotor speed
- V/Hz control
Same shape
- torque compensation
- voltage compensation
- load compensation
VFD tuning parameters
- slip compensation
- torque boost
- acceleration time
induction-motor speed quantities
- synchronous speed
- rotor speed
- slip frequency
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.
