Siemens SINAMICS G120 Instructions d'exploitation télécharger pdf (Page 17)

Introduction

1.4 Frequently required parameters

Inverter with CU240B-2 and CU240E-2 Control Units

Operating Instructions, 01/2011, FW 4.4, A5E02299792B AB

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.

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Siemens SINAMICS G120 Instructions d'exploitation Page 17