Danfoss VLT AutomationDrive FC 301 Programming Manual page 663

VLT AutomationDrive FC 301/302
Programming Guide
Parameter 40-14 Mains Loss Duration
Table 1352: Parameter 40-14 Mains Loss Duration
40-14 Mains Loss Duration
Default value: 60.00 s
Conversion index: -2
Enter the maximum value of mains loss duration. When parameter 14-10 Mains Failure = [4] Kinetic Back-up, the DC-link voltage
boosts to the value set in Parameter 40-10 Kin. Back-up UdcRef. Then the drive returns to normal operation. The drive allows 2 succes-
rd
sive mains faults. A 3 mains fault triggers a trip. Setting this parameter to 60 s disables the function.
Parameter 40-15 Kin.Back-up Start Off
Table 1353: Parameter 40-15 Kin.Back-up Start Off
40-15 Kin.Back-up Start Off
Default value: Size related
Conversion index: -1
Set the voltage offset to be added to the kinetic back-up reference to boost the gain when kinetic back-up is activated. This function
is used in low-inertia applications.
5.30.2 40-2* PM Motor Specific
The following parameters are only available in FC 302:
-
Parameter 40-28 Back EMF Protection
-
Parameter 40-29 B-EMF Protection Log Readout
Parameter 40-28 Back EMF Protection
Table 1354: Parameter 40-28 Back EMF Protection
40-28 Back EMF Protection
Default value: [1] Enabled
Conversion index: -
The drive is protected by default from Back EMF, which can be generated by IPM or SPM motor types due to calculated speed limita-
tion. The actual limitation is based on parameter 1-40 Back EMF at 1000 RPM and protects the drive from motor-generated overvolt-
age.
By disabling the speed limitation, a risk of destructive effect on the IGBTs can be encountered when the drive loses the motor. If
the function is disabled, ensure to protect the drive by other means to prevent motor-generated overvoltage.
Option
[0]
[1]*
Danfoss A/S © 2022.12
Parameter type: Range, 0.05 - 60.00 s
Data type: Uint16
Parameter type: Range, -200.0 - 200.0 V
Data type: Uint16
N O T I C E
Parameter type: Option
Data type: Uint8
C A U T I O N
Name
Disabled
Enabled
Parameter Descriptions
Setup: All setups
Change during operation: True
Setup: All setups
Change during operation: True
Setup: All setups
Change during operation: False
Description
AU275636650261en-000101 / 130R0334 | 663