Vector control 4.9 Vdc control

Description of Vdc_max control

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Figure 4-15 Switching Vdc_max control on/off

The switch-in level for Vdc_max control (r1242) is calculated as follows:

When the function for automatically detecting the switch-on level is switched off (p1254 = 0)

r1242 = 1.15 * p0210 (device connection voltage, DC link).

When the function for automatically detecting the switch-on level is switched on (p1254 = 1)

r1242 = Vdc_max - 50 V (Vdc_max: overvoltage threshold of the Motor Module)

Function diagrams (see SINAMICS S List Manual)

● 6220 Vdc_max controller and Vdc_min controller

Overview of key parameters (see SINAMICS S List Manual)

p1240[0...n] Vdc controller or Vdc monitoring configuration

r1242 Vdc_max controller switch-in level

p1243[0...n] Vdc_max controller dynamic factor (control)

p1245[0...n] Vdc_min controller switch-in level (kinetic buffering) (control)

r1246 Vdc_min controller switch-in level (kinetic buffering) (control)

p1247[0...n] Vdc_min controller dynamic factor (kinetic buffering) (control)

p1250[0...n] Vdc controller proportional gain (control)

p1251[0...n] Vdc controller integral time (control)

p1252[0...n] Vdc controller derivative-action time (control)

p1254 Vdc_max controller automatic detection ON level (control)

136

Drive Functions

Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4

Page 136
Image 136
Efficient Networks S120 manual Description of Vdcmax control, 6ZLWFKRQOHYHO