Vacon 20 CP/X, Applications Manual

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vacon • 59 Parameter description
4
4.8 Motor control
P8.1 M
OTOR CONTROL MODE
0: Frequency control
1: Speed control (sensorless control)
In speed control, the motor slip is compensated.
Note
: motor identification automatically sets this parameter to 1.
P8.2 F
IELD WEAKENING POINT
Output frequency corresponding to max voltage.
Note: if P1.7 Nominal Frequency is changed, P8.2 will be set at same value.
P8.3 V
OLTAGE AT FIELD WEAKENING POINT
Motor voltage when frequency is above FWP, defined as% of nominal voltage.
Note : if P1.6 Nominal Voltage is changed, P8.3 will be set at 100%.
If the programmed maximum frequency is higher than motor nominal frequency, field weak-
ening point is automatically set at maximum frequency and fwp voltage is set proportionally
higher than 100%.
This could allow to exploit the higher voltage possibly coming from the panels.
In this situation the current limit has to be set properly, to prevent a motor overload.
If the drive is fed from mains, maximum output frequency will be limited by actual DC voltage,
according to nominal U/f ratio.