Siemens SINAMICS V20 Series, Руководство по эксплуатации, Страница: 184 / 274

Parameter list
7.2 Parameter list
SINAMICS V20 Inverter
184
Operating Instructions, 07/2012, A5E03728167
Parameter Function Range Factory
default Can be
changed Scaling Data
set Data
type Acc.
Level
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
[%]
20.0 -
150.0
106.0 U, T - DDS Float 3
Sets maximum modulation index.
Note: P1803 = 100 %: Limit for over-control (for ideal inverter without switching delay).
P1820[0...2] Reverse output phase
sequence
0 - 1 0 T - DDS U16 2
Changes sequence of phases without changing setpoint polarity.
0 Forward
1 Reverse the Motor
Note: See P1000
P1825 On-state voltage of IGBT
[V]
0.0 - 20.0 0.9 U, T - - Float 4
Corrects on-state voltage of the IGBTs.
P1828 Gating unit dead time
[μs]
0.00 - 3.98 0.01 U, T - - Float 4
Sets compensation time of gating unit interlock.
P1900 Select motor data
identification
0 - 2 0 C(1), T - - U16 2
Performs motor data identification.
0 Disabled
2 Identification of all parameters in standstill
Dependency: No measurement if motor data incorrect.
P1900 = 2: Calculated value for stator resistance (see P0350) is overwritten.
Notice: When the identification is finished P1900 is set to 0. When choosing the setting for measurement, observe
the following:
The value is actually adopted as P0350 parameter setting and applied to the control as well as being
shown in the read-only parameters below. Ensure that the motor holding brake is not active when
performing the motor identification.
Note: Before selecting motor data identification, "Quick commissioning" has to be performed in advance.
Since the cable length of the applications differs in a wide range, the preset resistor P0352 is only a rough
estimation. Better results of the motor identification can be achieved by specifying the cable resistor before
the start of the motor identification by measuring / calculating.
Once enabled (P1900 > 0), A541 generates a warning that the next ON command will initiate
measurement of motor parameters.
Communications - both via USS as well as via the Modbus - are interrupted for the time that it takes to
make internal calculations. These calculations can take up to one minute to complete.
P1909[0...2] Control word of motor
data identification
- 0101
1100
0000
0000 bin
U, T - DDS U16 4
Control word of motor data identification.