123
SPX advanced – description of parameters
SPX ADVANCED APPLICATION MANUAL
SVCH0203—October 2017 www.eaton.com
5.10.1.4 Speed controller gain with different loads
The speed controller can also be tuned for different loads.
Speed controller gain is first manipulated by the speed area
gain function and this result is then further adjusted by
torque related relative gain.
100 %
Kp Torq Gain
Gain after
speed area
adjust
100 %
TorqMin
T
Code
ID
Description
Notes
P1.9.5.9
1296
Speed controller torque minimum “SPC torq min”
The level of speed controller output which the speed controller gain is changed to
with parameter P1.8.5.4.10 “Speed Controller torque minimum gain” using a filter set
by parameter P1.8.5.4.11 “Speed Controller torque minimum filtering time”. This is in
percent of the motor nominal torque.
P1.9.5.10
1295
Speed controller torque minimum gain “SPC Kp torq min”
Relative gain as a percentage of the speed controller gain after speed area adjustment
when the speed control output is less than the “Speed Controller torque minimum”.
This parameter is normally used to stabilise the speed controller for a drive system
with gear backlash.
P1.9.5.11
1297
Speed controller torque minimum filtering time “SPC Kp TC torq”
Filtering time for torque. When the speed controller gain is changed below the Speed
Controller torque minimum.
Code
ID
Description
Notes
P1.10.1
601
Switching frequency “Switching freq”
Motor noise can be minimised using a high switching frequency. Note, however, that
increasing the switching frequency increases losses of the frequency converter. Lower
frequencies are used when the motor cable is long and the motor is small.
The range of this parameter depends on the size of the frequency converter:.
Table 52. Size-dependent switching frequencies
Type
Min. [kHz]
Max. [kHz]
Default [kHz]
0003—0061 4
0003—0061 2
1.0
16,0
3,6
0072—0520 4
1.0
10.0
3.6
0041—0062 5
0144—0208 5
1.0
6.0
1.5
DriveSynch operation
When using DriveSynch the maximum switching frequency is limited to 3,6 kHz.
The actual switching frequency
might be reduced down to 1,5kHz
by thermal management functions.
This has to be considered
when using sine wave filters or
other output filters with a low
resonance frequency.
If the switching frequency is
changed it is necessary to redo
the identification run.
P1 .10 .2
1516
Modulator Type ‘Modulator type”
Select modulator type. Some operations require use of a software modulator.
0 = ASIC modulator
A classical third harmonic injection. The spectrum is slightly better compared to the
Software 1 modulator.
1 = Software Modulator 1
Symmetric vector modulator with symmetrical zero vectors.
Current distortion is less than with software modulator 2 if boosting is used.
2 = Software modulator 2
One phase at a time in IGBT switches is not modulated during a 60-degree period
of the frequency cycle. The unmodulated phase is connected to either positive or
negative DC-bus.
An ASIC modulator cannot be used
when using DriveSynch or PMS
motor with an incremental type
encoder.
Recommended for DriveSynch (Set
by default when DS activated) and
needed when using PMS motor
with an incremental encoder.
5.11 Drive control
