Functions
7.6 Protection functions
Inverter cabinet units
Operating Instructions, 12/2014, A5E32923362A
371
Description
Figure 7-17 Switching Vdc_min control on/off (kinetic buffering)
When Vdc_min control is enabled with p1240 = 2.3 (p1280), it is activated if the power fails
when the Vdc_min switch-in level (r1246 (r1286)) is undershot. In general, the regenerative
power (braking energy) of the drive machine generated when the motor speed is reduced is
used to buffer the DC-link voltage of the drive; in other words, when Vdc_min control is
active, the motor speed no longer follows the main setpoint and can be reduced to zero. The
drive continues operating until the shutdown threshold of the DC-link voltage is undershot
(see "Switching Vdc_min control on/off" <1>).
Note
Parameter specifications in brackets
All parameter specifications in parentheses refer to V/f control.
Содержание SINAMICS G120P
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