Engineering Guide CDA3000
4-73
4 Software functions
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EN
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A
Voltage Frequency Control
Subject area
Function
Effect
Adaptation of the inverter module to the
motor and to the load characteristic of the
application.
The motor generates the optimum torque
for the application.
Automatic adaptation of the V/F charac-
teristic to the load situation. Compensa-
tion for the voltage drop on the stator
resistor of the motor.
In case of load surges a higher torque is
available, and the motor heats up less.
Increase in output frequency proportional
to the load on the motor.
The slip of the motor is compensated and
the speed thereby kept constant inde-
pendent of the load.
An adjustable current is injected into the
motor up to a limit frequency.
Increase in starting torque
Prior to acceleration of the motor a
magnetic field is injected into the motor.
When the motor is started the full torque
is available immediately.
V/F characteristic
I x R load
compensation
Slip compensation
Current injection
Remagnetization
Sensorless Flux Control / Field Oriented Regulation
Subject area
Function
Effect
Setting of the speed control loop for
Sensorless Flux Control
Very smooth running and good dynamics
of the drive without encoder evaluation.
Input of the encoder data.
Adaptation of the inverter module to the
encoder of the motor.
Speed controller SFC
Encoder evaluation
