WEG MVW3000 Series, Programming Manual

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5
DETAILED PARAMETER DESCRIPTION
P0142 - Maximum Voltage
P0143 - Intermediate output voltage
P0144 - Output voltage at 3 Hz
P0145 - Field weakening speed
P0146 - Intermediate speed
Adjustable range: P0142 = 0.0 to 100.0 %
P0143 = 0.0 to 100.0 %
P0144 = 0.0 to 100.0 %
P0145 = 0 to 7200 rpm
P0146 = 90 to 7200 rpm Factory setting: P0142 = 100.0 %
P0143 = 50.0 %
P0144 = 8.0 %
P0145 = 1800 rpm
P0146 = 900 rpm
Acesso: Menu
→
Configurations
→
Control
Description:
It allows changing the standard V/F curves defined in P0202. It may be used to obtain approximately quadratic
V/F curves or on motors with voltages/frequencies different from the conventional standards.
This function allows changing the defined standard characteristic curves, which relate the inverter output volt-
age and frequency and consequently the motor magnetization flux. This characteristic can be used in special
applications in which the motors need rated voltage or rated frequency different from the standards.
Function activated with P0202 = 2 (Adjustable V/F (refer to P0142 to P0146)).
The standard value of P0144 (8.0 %) is defined for standard motors 60 Hz. In case the motor rated frequency
(set in P0403) is different from 60 Hz, the standard value of P0144 may become inadequate, and it may cause
problems in the motor start.
If it is necessary to increase the starting torque, increase the value of P0144 gradually.
Procedure to parameterize the “Adjustable V/F” function:
1. Disable the inverter.
2. Check the inverter data (P0295 and P0296).
3. Set the motor data (P0400 to P0406).
4. Set the data for indication of P0001 and P0002 (P0208).
5. Set the speed limits (P0133 and P0134).
6. Set the parameters of the adjustable V/F function (P0142 to P0146).
7. Enable the adjustable V/F function (P0202 = 2).
P0134 P0145 P0146 3 Hz 0.1 Hz 0
P0143
P0144
P0202 = 2
P0142
100 %
Output voltage
Frequency
Figure 5.15: Adjustable V/F curve
✓
NOTE!
This parameter can be changed only with the motor stopped.
This parameter is only visible on the HMI when: the control type is adjustable scalar, P0202 = 2
(Adjustable V/F (refer to P0142 to P0146)).
MVW3000 | 5-22