Operation mode overvoltage control,
Voltage controller: Parameter Operation Mode 670 = 1
The overvoltage controller prevents a switch-off of the frequency inverter in generator operation.
The reduction of the drive speed by a ramp gradient selected via the parameter Deceleration
(Clockwise) 421 and Deceleration Anticlockwise 423 can lead to an overvoltage in the DC link. If
the voltage exceeds the figure set by the parameter Reference DC-Link Limitation 680, the
deceleration is reduced in such a way that the DC link voltage is regulated to the set value. If the DC
link voltage cannot be regulated to the set reference value by the reduction of the deceleration, the
deceleration is stopped and the output frequency raised. The output frequency is calculated by
addition of the parameter value Max. Frequency Rise 681 to the frequency at the operating point of
the controller intervention.
For reliable operation of the overvoltage control, Bonfiglioli Vectron MDS GmbH recommends setting
the motor chopper Trigger Threshold 507 < ( Reference DC-Link Limitation 680 – 10 V) . Refer to
Chapter 19.7.1 "19.7.1".
To Next Page
Loading...
Need help?
General
