Parameters: 2-** Brakes - Danfoss VLT AutomationDrive FC 301 Programming Manual

Parameter Descriptions
Together with 1-98 ATEX ETR interpol. points freq., these
make up a table (f [Hz],I [%]).
NOTICE
All frequency/current limit points from the motor name
plate or motor data sheet must be programmed.
3.3.12 PM Settings
If [2] Std. PM, non salient is selected in 1-10 Motor
Construction, enter the motor parameters manually, in the
following order:
1. 1-24 Motor Current
2. 1-26 Motor Cont. Rated Torque
3. 1-25 Motor Nominal Speed
4. 1-39 Motor Poles
5. 1-30 Stator Resistance (Rs)
6. 1-37 d-axis Inductance (Ld)
7. 1-40 Back EMF at 1000 RPM
The following parameters have been added for PM motors.
1-41 Motor Angle Offset
1-07 Motor Angle Offset Adjust
1-14 Damping Gain
1-47 Torque Calibration
1-58 Flystart Test Pulses Current
1-59 Flystart Test Pulses Frequency
1-70 PM Start Mode
30-20 High Starting Torque Time [s]
30-21 High Starting Torque Current [%]
NOTICE
Standard parameters still need configuration
(e.g. 4-19 Max Output Frequency etc.).
®
VLT AutomationDrive FC 301/302 Programming Guide
Application
Low inertia applications
I /I
Load Motor
Low inertia applications
50>I /I
Load
High inertia applications
I /I
Load Motor
High load at low speed
<30% (rated speed)
Table 3.9 Recommendations for VVC
If the motor starts oscillating at a certain speed, increase
1-14 Damping Gain. Increase the value in small steps.
Depending on the motor, a good value for this parameter
can be 10% or 100% higher than the default value.
Adjust starting torque in 1-66 Min. Current at Low Speed.
100% provides nominal torque as starting torque.
Application
Low inertia applications
High inertia applications
High load at low speed
Table 3.10 Recommendations for FLUX Applications
Adjust starting torque in 1-66 Min. Current at Low Speed.
100% provides nominal torque as starting torque.

3.4 Parameters: 2-** Brakes

3.4.1 2-0* DC-Brakes
Parameter group for configuring the DC brake and DC
hold functions.
MG33MH02 - Rev. 2013-09-30
Settings
1-17 Voltage filter time const. to be
<5 increased by factor 5 to 10
1-14 Damping Gain should be
reduced
1-66 Min. Current at Low Speed
should be reduced (<100%)
Keep calculated values
>5
Motor
1-14 Damping Gain, 1-15 Low Speed
> 50 Filter Time Const. and 1-16 High
Speed Filter Time Const. should be
increased
1-17 Voltage filter time const. should
be increased
1-66 Min. Current at Low Speed
should be increased (>100% for
longer time can overheat the motor)
plus
Settings
Keep calculated values
1-66 Min. Current at Low Speed
Increase speed to a value between
default and maximum depending on
application.
Set ramp times matching the
application. Too fast ramp up causes
an overcurrent/overtorque. Too fast
ramp down causes an overvoltage
trip.
1-66 Min. Current at Low Speed
Increase speed to a value between
default and maximum depending on
application.
3
Applications
53
3