WEG CFW-10 EASYDRIVE User Manual page 62

CHAPTER 6 - DETAILED PARAMETER DESCRIPTION
[Factory Setting]
Parameter
(1)
P142
Maximum Output
Voltage
(1)
P145
Field Weakening
Frequency 0.01Hz (<100Hz)
(Rated Frequency) 1Hz (>99.9Hz)
(1)
This parameter can be changed only with disabled inverter (stopped motor).
62
Range
To set the parameter P138 adopt the following procedure:
Define the V/F curve used in V/Fcontrol (P202=0 or 1).
0 to 100%
These parameters allow changing the standard V/F cur-
[ 100% ]
ve defined at P202 - programmable V/F curve.
0,1%
P142 sets the maximum output voltage. This value is set
as a percent of the inverter supply voltage.
P133 to P134
[ 60.0Hz ]
Parameter P145 defines the rated frequency of the mo-
tor used.
The V/F curve relates the inverter output voltage and
frequency (applied to the motor) and consequently the
magnetizing flux of the motor.
The programmable V/F curve can be used in special
applications where the motors used require a rated
voltage and/or frequency different than the standard ones.
Examples: motor for 220V/300Hz and a motor for 200V/
60Hz.
Parameter P142 is also useful in appplications that
require rated voltage different from the inverter supply
voltage. Example: 220V line and 200V motor.
Description / Notes
Output Voltage
Figure 6.10 - V/F curve with slip compensation
- run the motor without load up to approximately half
of the application top speed;
- measure the actual motor or equipment speed;
- apply rated load to equipment;
- increase parameter P138 until the speed reaches
its no-load speed.
NOTE!
For inverter models 110-127V; the output voltage
applied to the motor is doubled the power supply
voltage on the inverter input.
(function of
the motor
load)
Output
frequency