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Controllers
Parameter manual
b maXX
BM3000
Document no.: 5.12001.07
Baumüller Nürnberg GmbH
490
4.7
4.7.3
DC link controller
4.7.3.1 Description of the DC link controller
The controller for the DC link voltage, the DC link controller in short, is a PI controller
which acts on the current limit.
The controller does this by limiting the generator current, because in generator operation
(while braking the drive) the DC link voltage rises as a result of the current that is fed back.
Depending on the direction of revolution, either the upper or the lower limit of the Iq cur-
rent is adjusted.
4.7.3.2 ProDrive DC link controller
Figure 161:
ProDrive DC link controller
4.7.3.3 Reactive current brakes
The dynamic at a braking process drops if there is no brake resistor, because the energy
of the motor must be reduced. Additional energy in the motor can be reduced by applying
reactive current.
The Udc link-ld controller operates with the same controller parameters as the Udc link
controller. The threshold (set value) can be set separately by a factor (
) in de-
pendence of the maximum DC-link voltage (
). If the DC-link voltage exceeds the
threshold, then the maximum Id current can either be applied immediately or the Id cur-
rent is continuously (bit 6 of
) The Udc link-ld controller is switched on by bit 4 of
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