Siemens CU230P-2 HVAC Parameter Manual page 211

r1801[0...1] CO: Pulse frequency / Pulse frequency
Access level: 2
Unit: [kHz]
Description: Displays the actual converter switching frequency.
Index: [0] = Actual
[1] = Minimum value of the modulator
Note: The selected pulse frequency (p1800) may be reduced if the drive converter has an overload condition (p0290).
p1802[0...n] Modulator mode / Modulator mode
PM230 Access level: 3
Can be changed: T
Min
0
Description: Sets the modulator mode.
Value: 0:
2:
3:
4:
10:
Dependency: If a sine-wave filter is parameterized as output filter (p0230 = 3, 4), then only space vector modulation without over-
control can be selected as modulation type (p1802 = 3).
Refer to: p0230
Note: When modulation modes are enabled that could lead to overmodulation (p1802 = 0, 2, 10), the modulation depth
must be limited using p1803 (pre-assignment, p1803 = 98%). The higher the overmodulation, the greater the cur-
rent ripple and torque ripple. With p1802 = 10, the modulation depth limit is automatically reduced to 100% in the
critical output frequency range (over approx. 57 Hz).
When changing p1802[x], the values for all of the other existing indices are also changed.
p1802[0...n] Modulator mode / Modulator mode
PM230 Access level: 3
PM250, PM260
Can be changed: T
Min
0
Description: Sets the modulator mode.
Value: 0:
2:
3:
4:
Dependency: If a sine-wave filter is parameterized as output filter (p0230 = 3, 4), then only space vector modulation without over-
control can be selected as modulation type (p1802 = 3).
Refer to: p0230
Note: When modulation modes are enabled that could lead to overmodulation (p1802 = 0, 2, 10), the modulation depth
must be limited using p1803 (pre-assignment, p1803 = 98%). The higher the overmodulation, the greater the cur-
rent ripple and torque ripple. With p1802 = 10, the modulation depth limit is automatically reduced to 100% in the
critical output frequency range (over approx. 57 Hz).
When changing p1802[x], the values for all of the other existing indices are also changed.
© Siemens AG 2009 All Rights Reserved
SINAMICS G120 Control Units CU230P-2 Parameter Manual (LH9), 11/2009
Automatic changeover SVM/FLB
Space vector modulation (SVM)
SVM without overcontrol
SVM/FLB without overcontrol
SVM/FLB with modulation depth reduction
Automatic changeover SVM/FLB
Space vector modulation (SVM)
SVM without overcontrol
SVM/FLB without overcontrol
Calculated: -
Scaling: p2000
Calculated: p0340 = 1,3,5
Scaling: -
Max
10
Calculated: p0340 = 1,3,5
Scaling: -
Max
4
Parameters
List of Parameters
Data type: FloatingPoint32
Data set: -
Data type: Integer16
Data set: DDS, p0180
Factory setting
10
Data type: Integer16
Data set: DDS, p0180
Factory setting
4
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