Siemens SINAMICS G120 Operating Instructions Manual page 17
Frequency converter
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Also See for SINAMICS G120:
- List manual (1256 pages) ,
- Manual (732 pages) ,
- Operating instructions manual (550 pages)
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Table 1- 5
This is how you set the closed-loop type
Parameter
Description
p1300
0: V/f control with linear characteristic
1: V/f control with linear characteristic and FCC
2: V/f control with parabolic characteristic
3: V/f control with parameterizable characteristic
4: V/f control with linear characteristic and ECO
5: V/f control for drives requiring a precise frequency (textile area)
6: V/f control for drive requiring a precise frequency and FCC
7: V/f control with parabolic characteristic and ECO
19: V/f control with independent voltage setpoint
20: Speed control (without encoder)
22: Torque control (without encoder)
Table 1- 6
This is how you optimize the starting behavior of the V/f control for a high break loose torque and overload
Parameter
Description
p1310
Voltage boost to compensate ohmic losses
The voltage boost is active from standstill up to the rated speed.
It is at its highest at speed 0 and continually decreases as the speed increases.
Value of the voltage boost at zero speed 0 in V:
1.732 × rated motor current (p0305) × stator resistance (r0395) × p1310 / 100%
p1311
Voltage boost when accelerating
The voltage boost is effective from standstill up to the rated speed.
It is independent of the speed and has a value in V of:
1.732 × rated motor current (p0305) × stator resistance (p0350) × p1311 / 100%
p1312
Voltage boost when starting
Setting to additionally boost the voltage when starting, however only when accelerating for the first time.
Inverter with CU240B-2 and CU240E-2 Control Units
Operating Instructions, 01/2011, FW 4.4, A5E02299792B AB
1.4 Frequently required parameters
Introduction
15
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