WEG CFW501 V1.8X Programming Manual page 81

P0142 – Maximum Output Voltage
P0143 – Intermediate Output Voltage
P0144 – Minimum Output Voltage
Adjustable 0.0 to 100.0 %
Range:
Properties:
cfg, V/f
Description:
These parameters allow adjusting the inverter V/f curve together with its orderly pairs P0145, P0146 and P0147.
P0145 – Field Weakening Start Speed
P0146 – Intermediate Output Speed
P0147 – Minimum Output Speed
Adjustable 0.0 to 18000
Range:
Properties: cfg, V/f
Description:
These parameters allow adjusting the inverter V/f curve together with its orderly pairs P0142, P0143 and P0144.
The V/f curve can be adjusted in applications where the motor rated voltage is smaller than the power supply
voltage, for instance, in a 440 V power supply with 380 V motor.
The adjustment of the V/f curve is necessary when a quadratic approximation is desired for energy saving in
centrifugal pumps and fans, or in special applications: when a transformer is used between the inverter and the
motor or the inverter is used as a power supply.
V/f Scalar Control
Factory P0142 = 100.0 %
Setting: P0143 = 66.7 %
P0144 = 33.3 %
Factory P0145 = 1800
Setting:
(1500) rpm
P0146 = 1200
(1000) rpm
P0147 = 600
(500) rpm
CFW501 | 9-5
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