Baumuller b maXX BM5800 - Short Circuit Brake; Parameter Overview of the DC Link Controller

Description of the Software Modules and Parameters
Parameter manual b maXX BM5800
Document No.: 5.16029.03
479
of 814
3
Asynchronous motor
The maximum Id current (Saturation magnetizing current Z146.12–) is supplied at an
asynchronous motor. The motor flux increases with the Id current and thereby the re-
quired voltage. The field weakening controller counteracts the Udc link controller and the
maximum Id current cannot be supplied, if the required voltage exceeds the available volt
-
age.
At high speeds it is possible to supply block-shaped Id current with the output of the Udc
link-ld controller. At this process the flux increases and decreases dependent of the ld
current signs.
The sign of the ld current changes, if the actual flux value (Z146.14–) exceeds the limits,
which are between 100% of the flux set value and the adjustable threshold (Z114.8–).
The block-shaped ld current is supplied above the adjustable threshold (Z114.7–) - below
the threshold positive ld current is supplied, only.
3.7.4.4 Short circuit brake
Synchronous motors are able to be braked using a short circuit brake, additionally. If the
DC link voltage exceeds a set threshold, the motor phases are shorted and the current
no longer flows into the DC link. The motor is decelerated by the resulting current.
3.7.4.5 Parameter Overview of the DC link controller
Functional block: FbUzkcontroller [114]
For Parameter 130.3, see ZPower unit– from page 61.
Number Name Type Min Max Default Value Unit Factor
Read only Storage DS Support Cyclic Write Axis-independent
114.1 DC link controller set
value
FLOAT 10 850 850 V 1:1 X
114.2 Kp DC link controller FLOAT 0.001 256 0.01 1/V 1:1 X
114.3 Tn of DC link controller FLOAT 0 1000 0.2 ms 1:1 X
114.5 Iq upper limit DC link ctrl FLOAT 0 10000 10000 A 1:1 X
114.6 Iq lower limit DC link ctrl FLOAT -10000 0 -10000 A 1:1 X
114.7 Speed threshold for
block shape current
FLOAT 0 1e9 600000 Grad/s 1:1 X
114.8 Flux threshold FLOAT 0 1 0.5 % 1:100 X O
114.9 DC link voltage hystere-
sis
FLOAT 0 100 0 V 1:1 X