Permanent Magnet Motor Set-Up - Danfoss VLT HVAC Drive FC 102 Operating Instructions Manual

Commissioning
6. Parameter 1-36 Iron Loss Resistance (Rfe).
Application-specific adjustment when running VVC
VVC + is the most robust control mode. In most situations,
it provides optimum performance without further
adjustments. Run a complete AMA for best performance.
Application-specific adjustment when running Flux
Flux mode is the preferred control mode for optimum
shaft performance in dynamic applications. Perform an
AMA since this control mode requires precise motor data.
Depending on the application, further adjustments may be
required.
See Table 5.7 for application-related recommendations.
Application Settings
Low-inertia applications Keep calculated values.
High-inertia applications Parameter 1-66 Min. Current at Low
Speed.
Increase current to a value between
default and maximum depending on
the application.
Set ramp times matching the
application. Too fast ramp up causes
an overcurrent or overtorque. Too
fast ramp-down causes an
overvoltage trip.
High load at low speed Parameter 1-66 Min. Current at Low
Speed.
Increase current to a value between
default and maximum depending on
the application.
No-load application Adjust parameter 1-18 Min. Current at
No Load to achieve smoother motor
operation by reducing torque ripple
and vibration.
MG16I322
Operating Instructions
Application
Flux sensorless only
+
Table 5.7 Recommendations for Flux Applications

5.4.5 Permanent Magnet Motor Set-up

NOTICE!
Only use permanent magnet (PM) motor with fans and
pumps.
Initial Programming Steps
1.
2.
Programming motor data
After selecting PM motor in Parameter 1-10 Motor
Construction, the PM motor-related parameters in
parameter groups 1-2* Motor Data, 1-3* Addl. Motor Data
and 1-4* are active.
The necessary data can be found on the motor nameplate
and in the motor data sheet.
Program the following parameters in the listed order
1.
2.
3.
4.
5.
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Settings
Adjust parameter 1-53 Model Shift
Frequency.
Example 1: If the motor oscillates at
5 Hz and dynamics performance is
required at 15 Hz, set
parameter 1-53 Model Shift Frequency
to 10 Hz.
Example 2: If the application
involves dynamic load changes at
low speed, reduce
parameter 1-53 Model Shift Frequency.
Observe the motor behavior to
make sure that the model shift
frequency is not reduced too much.
Symptoms of inappropriate model
shift frequency are motor oscillations
or adjustable frequency drive
tripping.
Activate PM motor operation
Parameter 1-10 Motor Construction, select (1) PM,
non-salient SPM
Set parameter 0-02 Motor Speed Unit to [0] RPM
Parameter 1-24 Motor Current
Parameter 1-26 Motor Cont. Rated Torque
Parameter 1-25 Motor Nominal Speed
Parameter 1-39 Motor Poles
Parameter 1-30 Stator Resistance (Rs)
Enter line to common stator winding resistance
(R ). If only line-line data are available, divide the
s
line-line value by 2 to achieve the line to
common (starpoint) value.
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