Siemens 440 - Manual (Page 188)

Parameter Description Issue 01/06
MICROMASTER 440 Parameter List
188 6SE6400-5BB00-0BP0
3.30 Inverter parameters (Modulator)
P1800 Pulse frequency Min: 2
CStat: CUT Datatype: U16 Unit: kHz Def: 4
P-Group: INVERTER Active: Immediately QuickComm.: No Max: 16
Sets pulse frequency of power switches in inverter. The frequency can be changed in steps of 2 kHz.
Dependency:
Minimum pulse frequency depends on P1082 (maximum frequency) and P0310 (rated motor frequency).
-
see derating in P1082
- P1800 > 30 * P0310
Note:
- If the pulse frequency is increased, max. inverter current r0209 can be reduced (derating). The derating
characteristic depends on the type and power of the inverter (see manuall OPERATING
INSTRUCTION).
- 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 switching frequency to provide protection
against over-temperature (see P0290).
r1801 CO: Act. pulse frequency Min: -
Datatype: U16 Unit: kHz Def: -
P-Group: INVERTER Max: -
Actual pulse frequency of power switches in inverter.
Notice:
Under certain conditions (inverter overtemperature, see P0290), this can differ from the values selected in
P1800 (pulse frequency).
P1802 Modulator mode Min: 0
CStat: CUT Datatype: U16 Unit: - Def: 0
P-Group: INVERTER Active: first confirm QuickComm.: No Max: 2
Selects inverter modulator mode.
Possible Settings:
0 SVM/ASVM automatic mode
1 Asymmetric SVM
2 Space vector modulation
Notice:
- Asymmetric space vector modulation (ASVM) produces lower switching losses than space vector
modulation (SVM), but may cause irregular rotation at very low frequencies.
- 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[3] Max. modulation Min: 20.0
CStat: CUT Datatype: Float Unit: % Def: 106.0
P-Group: INVERTER Active: Immediately QuickComm.: No Max: 150.0
Sets maximum modulation index.
Index:
P1803[0] : 1st. Drive data set (DDS)
P1803[1] : 2nd. Drive data set (DDS)
P1803[2] : 3rd. Drive data set (DDS)
Note:
- P1803 = 100 % : Limit for over-control (for ideal inverter without switching delay).
-
For vector control the modulation limit will be reduced automatically with 4 %.
P1820[3] Reverse output phase sequence Min: 0
CStat: CT Datatype: U16 Unit: - Def: 0
P-Group: INVERTER Active: first confirm QuickComm.: No Max: 1
Changes direction of motor rotation without changing setpoint polarity.
Possible Settings:
0 OFF
1 ON
Index:
P1820[0] : 1st. Drive data set (DDS)
P1820[1] : 2nd. Drive data set (DDS)
P1820[2] : 3rd. Drive data set (DDS)
Dependency:
If positive and negative revolution is enabled, frequency setpoint is directly used.
If both positive and negative revolution are disabled, reference value is set to zero.
Details:
See P1000 (select frequency setpoint)
Level
2
Level
3
Level
3
Level
4
Level
2