Slvc/Vc-Restrictions; Slvc/Vc-Optimisation - Siemens MICROMASTER 440 Parameter Manual

Parameter Description
P1300 = 19 : V/f control with independent voltage setpoint
The following table presents an overview of control parameters (V/f) that can be modify in relationship to
P1300 dependencies:
ParNo. Parameter name
P1300[3]
Control mode
P1310[3]
Continuous boost
P1311[3]
Acceleration boost
P1312[3]
Starting boost
P1316[3]
Boost end frequency
P1320[3]
Programmable V/f freq. coord. 1
P1321[3]
Programmable V/f volt. coord. 1
P1322[3]
Programmable V/f freq. coord. 2
P1323[3]
Programmable V/f volt. coord. 2
P1324[3]
Programmable V/f freq. coord. 3
P1325[3]
Programmable V/f volt. coord. 3
P1330[3]
CI: Voltage setpoint
P1333[3]
Start frequency for FCC
P1335[3]
Slip compensation
P1336[3]
CO: U/f Slip limit
P1338[3]
Resonance damping gain V/f
P1340[3]
Imax freq. controller prop. gain
P1341[3]
Imax controller integral time
P1345[3]
Imax controller prop. gain
P1346[3]
Imax voltage ctrl. integral time
P1350[3]
Voltage soft start
SLVC / VC can provide excellent performance for the following types of application:
- Applications which require high torque performance
- Applications which require fast respond to shock loading
- Applications which require torque holding while passing through 0 Hz
- Applications which require very accurate speed holding
- Applications which require motor pull out protection

SLVC/VC-Restrictions:

- SLVC / VC is dependent on the accuracy of the motor model being used and the measurements being
performed by the inverter. There are therefore certain restrictions on the use of SLVC / VC:
f = min(200 Hz, 5 P0310)
max
1 P0305
≤
4 r0207
no synchronuos motor
Recommended means of SLVC/VC-commissioning:
- For correct operation under SLVC / VC control it is imperative that the name plate data of the motor
(P0304 - P0310) is correctly entered and that the motor data identification (P1910) must be carried out
on a cold motor. It is also necessary to ensure that the motor ambient temperature is correctly entered
in P0625 if this is significantly different from the default value of 20°C. This must be done after the quick
commissioning has been completed (P3900) but before the motor data identification measurements are
carried out.
- See parameter P0400 and documentation of encoder and encoder module when commissioning VC
(P1300 = 21 or 23).

SLVC/VC-Optimisation:

The following parameters can be adjusted by the user to improve performance.
- P0003 = 3
- P0342: Total / motor inertia ratio
Sensorless Vector Control (SLVC):
- P1470: P gain (SLVC)
- P1472: I term (SLVC)
- P1610: Continuous torque boost (SLVC, open loop boost)
- P1611: Acceleration torque boost (SLVC, open loop boost)
- P1750: Control word of motor model
- P1755: Start-frequency motor model (SLVC)
154
Level
2
2
2
2
3
3
3
3
3
3
3
3
3
2
2
3
3
3
3
3
3
(max. frequency)
r0209
≤
(ratio of rated motor current to rated inverter current )
r0207
U/f V/f
P1300 =
0 1 2 3 5 6 19
x x x x x x
x x x x x x
x x x x x x
x x x x x x
x x x x x x
− − − x − −
− − − x − −
− − − x − −
− − − x − −
− − − x − −
− − − x − −
− − − − − −
− x − − − x
x x x x − −
x x x x − −
x x x x − −
x x x x x x
x x x x x x
x x x x x x
x x x x x x
x x x x x x
MICROMASTER 440
Issue 01/06
SLVC VC
20 22 21 23
x x x x x
x − − − −
x − − − −
x − − − −
x − − − −
− − − − −
− − − − −
− − − − −
− − − − −
− − − − −
− − − − −
x − − − −
− − − − −
− − − − −
− − − − −
− − − − −
− − − −
x
x − − − −
− − − −
x
x − − − −
− − − −
x
Parameter List
6SE6400-5BB00-0BP0