Danfoss VLT AutomationDrive FC 301 Programming Manual page 667

VLT AutomationDrive FC 301/302
Programming Guide
The position and speed controllers are executed on the fastest control task (up to 7 kHz depending on the switching frequency) in
flux with motor feedback for PM motors and on the 1 ms task for induction motors. In dynamic mode, the position and speed con-
trollers are also executed on the fastest ontrol task for induction motors. This mode significantly improves control performance for
induction motors.
Option Name
[0]* Off
[1] On
Parameter 40-55 Modulation Index
Table 1368: Parameter 40-55 Modulation Index
40-55 Modulation Index
Default value: 100%
Conversion index: 0
This parameter is for IPM and SPM motors in VVC+ control principle only.
Activate this parameter by setting parameter 14-03 Overmodulation to [2] User Defined. Use this parameter to set the maximum mod-
ulation index and thus trim the application, especially if running with high-power motors without sine-wave filters. Increasing the
maximum modulation index increases the motor voltage and improves efficiency and stability. Setting the modulation index too
high may lead to torque ripples on the motor shaft.
Parameter 40-58 Control Word Source Internal
Table 1369: Parameter 40-58 Control Word Source Internal
40-58 Control Word Source Internal
Default value: [1] FC RS485
Conversion index: -
Option Name
[0] None
[1]* FC RS485
[2] FC USB
[3] Option A
[4] Option B
[5] Option C0
[6] Option C1
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Description
Dynamic mode is not activated.
Dynamic mode is activated.
Parameter type: Range, 80 - 106%
Data type: Uint8
N O T I C E
Parameter type: Option
Data type: Uint8
Description
Parameter Descriptions
Setup: All setups
Change during operation: True
Setup: 2 setups
Change during operation: False
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