Danfoss VACON NX, Инструкция по применению

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It is possible that the actual switching frequency reduces down to 1.5 kHz by thermal management functions. Consider the reduc-
tion when using sine wave filters or other output filters with a low resonance frequency. See parameters
ID 1084 and ID 655 .
10.279 (ID 602) Field Weakening Point Frequency
Location in the menu:
P2.6.4 (Standard Application, Local/Remote Control Application, Multi-step Speed Control Application, PID Control Application,
Multi-purpose Control Application (VACON
®
NXS), Pump and Fan Control Application)
P2.6.14.3 (Multi-purpose Control Application, VACON
®
NXP)
Use this parameter to set the output frequency at which the output voltage reaches the field weakening point voltage.
10.280 (ID 603) Voltage at Field Weakening Point
Location in the menu:
P2.6.5 (Standard Application, Local/Remote Control Application, Multi-step Speed Control Application, PID Control Application,
Multi-purpose Control Application (VACON
®
NXS), Pump and Fan Control Application)
P2.6.14.4 (Multi-purpose Control Application, VACON
®
NXP)
Use this parameter to set the voltage at the field weakening point as a percentage of the motor nominal voltage.
Above the frequency at the field weakening point, the output voltage stays at the set maximum value. Below the frequency at the
field weakening point, the U/f curve parameters control the output voltage. See the parameters
ID 109 , ID 108 , ID 604, andID 605 .
When setting the parameters ID 110 and ID 111 (nominal voltage and nominal frequency of the motor), the parameters ID 602 and
ID 603 automatically receive related values. To have different values for the field weakening point and the maximum output volt-
age, change these parameters only after setting the parameters
P3.1.1.1 and P3.1.1.2 .
10.281 (ID 604) U/f Midpoint Frequency
Location in the menu:
P2.6.6 (Standard Application, Local/Remote Control Application, Multi-step Speed Control Application, PID Control Application,
Multi-purpose Control Application (VACON
®
NXS), Pump and Fan Control Application)
P2.6.14.5
(Multi-purpose Control Application, VACON
®
NXP)
Use this parameter to set the middle point frequency of the U/f curve.
If the value of
ID 108 is programmable, this parameter gives the middle point frequency of the curve. See Illustration 25 and parame-
ter ID 605.
10.282 (ID 605) U/f Midpoint Voltage
Location in the menu:
P2.6.7
(Standard Application, Local/Remote Control Application, Multi-step Speed Control Application, PID Control Application,
Multi-purpose Control Application (VACON
®
NXS), Pump and Fan Control Application)
P2.6.14.6 (Multi-purpose Control Application, VACON
®
NXP)
Use this parameter to set the middle point voltage of the U/f curve.
If the value of
ID 108 is programmable, this parameter gives the middle point voltage of the curve. See 10.8 (ID 108) U/f Ratio Selec-
tion .
10.283 (ID 606) Output Voltage at Zero Frequency
Location in the menu:
P2.6.8 (Standard Application, Local/Remote Control Application, Multi-step Speed Control Application, PID Control Application,
Multi-purpose Control Application (VACON
®
NXS), Pump and Fan Control Application)
P2.6.14.7 (Multi-purpose Control Application, VACON
®
NXP)
Use this parameter to set the zero frequency voltage of the U/f curve.
The default value is different for different unit sizes.
If the value of parameter
ID 108 is changed, this parameter is set to zero. See Illustration 25 .
10.284 (ID 607) Overvoltage Controller
Location in the menu:
AB296635287482en-000301 / DPD00903 | 241 Danfoss A/S © 2023.02
Parameter Descriptions
VACON® NX All-in-One
Application Guide