Siemens SINAMICS G120 Instructions d'exploitation télécharger pdf (Page 175)

Functions

7.6 Motor control

Inverter with CU240B-2 and CU240E-2 Control Units

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

173

7.6.2 Vector control

7.6.2.1 Properties of vector control

Using a motor model, the vector control calculates the load and the motor slip. As a result of

this calculation, the inverter controls its output voltage and frequency so that the motor

speed follows the setpoint, independent of the motor load.

Vector control is possible without directly measuring the motor speed. This closed-loop

control is also known as sensorless vector control.

7.6.2.2 Commissioning vector control

Vector control only functions error-free if, during the basic commissioning, the motor data

were correctly parameterized and a motor data identification was performed with the motor in

the cold state.

You can find the basic commissioning in the following sections:

● Commissioning with the BOP-2 (Page 66)

● Commissioning with STARTER (Page 71)

Optimizing vector control

● Carry out the automatic speed controller optimization using (p1960 = 1)

Table 7- 26 The most important vector control parameters

Parameter Description

P1300 = 20 Control type: Vector control without speed encoder

p0300 …

p0360

Motor data is transferred from the rating plate during basic commissioning and

calculated with the motor data identification

p1452 …

p1496

Speed controller parameters

p1511 Additional torque

p1520 Upper torque limit

p1521 Lower torque limit

p1530 Motoring power limit

p1531 Regenerative power limit

Additional information about this function is provided in the parameter list and in function

diagrams 6030 onwards in the List Manual.

You will find more information On the Internet:

(http://support.automation.siemens.

com/WW/view/en/7494205):

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Siemens SINAMICS G120 Instructions d'exploitation Page 175