Siemens 440 manual Inverter parameters Modulator

Parameter Description Issue 01/06

3.30Inverter parameters (Modulator)

P1800	Pulse frequency				Min:	2
	CStat:	CUT	Datatype: U16	Unit: kHz	Def:	4
	P-Group:	INVERTER	Active: Immediately	QuickComm.: No	Max:	16

Level

2

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:	-	Level
	Datatype: U16	Unit: kHz	Def:	-	3
	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

Level

3

Selects inverter modulator mode.

Possible Settings:

0SVM/ASVM automatic mode

1Asymmetric SVM

2Space 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

Level

4

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

Level

2

Changes direction of motor rotation without changing setpoint polarity.

Possible Settings:

0OFF

1ON

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)

188	MICROMASTER 440 Parameter List
	6SE6400-5BB00-0BP0