Siemens SINAMICS V20 Operating Instructions Manual page 223

Parameter Function
P1780[0...2] Control word of Rs/Rr-
adaption
Enables thermal adaptation of stator and rotor resistance to reduce torque errors in speed / torque regula-
tion with speed sensor, or speed errors in speed / torque regulation without speed sensor.
Bit
00
P1800[0...2] Pulse frequency [kHz]
Sets pulse frequency of power switches in inverter. The frequency can be changed in steps of 2 kHz.
Dependency: The minimum / maximum / default values of the pulse frequency are determined by the used power mod-
ule.
Furthermore the minimum pulse frequency depends on the parameterization of P1082 (maximum fre-
quency) and P0310 (rated motor frequency).
Note: If the pulse frequency is increased, maximum inverter current r0209 can be reduced (derating). The derat-
ing characteristic depends on the type and power of the inverter.
If silent operation is not absolutely necessary, lower pulse frequencies may be selected to reduce inverter
losses and radio-frequency emissions.
Under certain circumstances, the inverter may reduce the pulse frequency to provide protection against
overtemperature (see P0290 and P0291 bit 00).
r1801[0...1] CO: Pulse frequency
[kHz]
Displays information about pulse frequency of power switches in inverter.
r1801[0] displays the actual inverter pulse frequency.
r1801[1] displays the minimum inverter pulse frequency which can be reached when the functions "motor
identification" or "inverter overload reaction" are active. If no PM is plugged this parameter is set to 0 kHz.
Index: [0]
[1]
Notice: Under certain conditions (inverter overtemperature, see P0290), this can differ from the values selected in
P1800 (pulse frequency).
P1802 Modulator mode
Selects inverter modulator mode.
1
2
3
Notice:
Asymmetric space vector modulation (ASVM) produces lower switching losses than space vector
•
modulation (SVM), but may cause irregular rotation at very low speeds.
Space vector modulation (SVM) with over-modulation may produce current waveform distortion at high
•
output voltages.
Space vector modulation (SVM) without over-modulation will reduce maximum output voltage available
•
to motor.
P1803[0...2] Maximum modulation [%]
Sets maximum modulation index.
Note: P1803 = 100 %: Limit for over-control (for ideal inverter without switching delay).
P1810[0...2] Control word Vdc control
Configures Vdc filtering and compensation.
SINAMICS V20 Inverter
Operating Instructions, 09/2014, A5E34559884
Range
0 - 1
Signal name
Enable thermal Rs/Rr-adapt.
2 - 16
-
Actual pulse frequency
Minimum pulse frequency
1 - 3
Asymmetric SVM
Space vector modulation
SVM / ASVM controlled mode
20.0 - 150.0 106.0
0 - 3
Factory Can be
default changed
1 U, T
4 U, T
- -
3 U, T
U, T
3 U, T
Parameter list
7.2 Parameter list
Scaling Data Data
set type
- DDS U16
1 signal 0 signal
Yes No
- DDS U16
- - U16
- - U16
- DDS Float
- - U16
Acc.
Level
3
2
3
3
3
3
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