Danfoss VLT AutomationDrive FC 301 Programming Manual page 65

Parameter Descriptions
overload. In the event of a machine current greater than
1.5 times the rated current, shut-down is immediate.
1-99 ATEX ETR interpol points current
Only visible if parameter 1-90 Motor Thermal Protection is set to
[20] or [21].
Range: Function:
NOTICE
Size related [0 - 100 %]
*
Valid for FC 302 only.
Definition of thermal limitation curve.
For example, see parameter 1-98 ATEX
ETR interpol. points freq.
Use the 4 current points [A] from the motor nameplate.
Calculate the values as percentage of nominal motor
current, I /I x 100 [%], and enter into this array.
m m,n
Together with parameter 1-98 ATEX ETR interpol. points freq.,
these constitute a table (f [Hz],I [%]).
NOTICE
All frequency/current limit points from the motor
nameplate or motor datasheet must be programmed.
3.3.14 PM Settings
If [2] Std. PM, non-salient is selected in
parameter 1-10 Motor Construction, enter the motor
parameters manually, in the following order:
1. Parameter 1-24 Motor Current.
2. Parameter 1-26 Motor Cont. Rated Torque.
3. Parameter 1-25 Motor Nominal Speed.
4. Parameter 1-39 Motor Poles.
5. Parameter 1-30 Stator Resistance (Rs).
6. Parameter 1-37 d-axis Inductance (Ld).
7. Parameter 1-40 Back EMF at 1000 RPM.
The following parameters have been added for PM motors.
1. Parameter 1-41 Motor Angle Offset.
2. Parameter 1-07 Motor Angle Offset Adjust.
3. Parameter 1-14 Damping Gain.
4. Parameter 1-47 Torque Calibration.
5. Parameter 1-58 Flying Start Test Pulses Current.
6. Parameter 1-59 Flying Start Test Pulses Frequency.
7. Parameter 1-70 PM Start Mode.
8. Parameter 30-20 High Starting Torque Time [s].
9. Parameter 30-21 High Starting Torque Current [%].
MG33ML02
Programming Guide
NOTICE
Standard parameters still need configuration (for
example parameter 4-19 Max Output Frequency).
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 3.11 Recommendations for VVC
If the motor starts oscillating at a certain speed, increase
parameter 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 parameter 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 3.12 Recommendations for Flux Applications
Adjust starting torque in parameter 1-66 Min. Current at Low
Speed. 100% provides nominal torque as starting torque.
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Settings
Increase parameter 1-17 Voltage filter
<5 time const. by factor 5–10.
Reduce parameter 1-14 Damping
Gain.
Reduce parameter 1-66 Min. Current
at Low Speed (<100%).
Keep calculated values.
>5
Motor
Increase parameter 1-14 Damping
> 50 Gain, parameter 1-15 Low Speed Filter
Time Const., and parameter 1-16 High
Speed Filter Time Const..
Increase parameter 1-17 Voltage filter
time const..
Increase parameter 1-66 Min. Current
at Low Speed (>100% for longer time
can overheat the motor).
+ Applications
Settings
Keep calculated values.
Parameter 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.
Parameter 1-66 Min. Current at Low
Speed.
Increase speed to a value between
default and maximum depending on
application.
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