ABB ACQ810 - User-Definable U;F Curve

72 Program features
 User-definable U/f curve
The user can define a custom U/f curve (output voltage as a function of frequency).
The curve can be used in special applications where linear and quadratic U/f ratios
are not adequate (e.g. when motor break-away torque needs to be boosted).
Notes:
•The U/f curve can be used in scalar control only, i.e., when parameter 99.05 Motor
ctrl mode is set to Scalar.
• Each user-defined point defined must have a higher frequency and higher voltage
than the previous point.
WARNING! High voltage at low frequencies may result in poor performance
or motor damage due to overheating.
Settings
Parameter group 38 Flux ref (page 218).
f (Hz )
Custom U/f ratio Voltage (V)
Par. 38.13
Par. 38.12
Par. 38.11
Par. 38.10
Par. 38.09
Par. 38.04 Par. 38.05 Par. 38.06 Par. 38.07 Par. 38.08