WEG CFW-11 Programming Manual page 131

Description:
It enables or disables the Optimal Braking function (section 11.6) in the DC voltage regulation, according to the
next table.
P0184
0 = With losses
(Optimal Braking)
1 = Without losses
2 = Enable/Disable via DIx
P0185 – Dc Link Voltage Regulation Level
Adjustable 339 to 400 V
Range: 585 to 800 V
585 to 800 V
585 to 800 V
585 to 800 V
809 to 1000 V
809 to 1000 V
924 to 1200 V
924 to 1200 V
Proprieties: Vector
Access groups 01 PARAMETER GROUPS
via HMI:
Description:
This parameter defines the DC link voltage regulation level during the braking. During the braking, the time of the
deceleration ramp is automatically extended, thus avoiding an overvoltage fault (F022). The setting of the DC link
regulation can be done in two manners:
1. With loss (optimal break) – set P0184=0.
1.1 - P0404 < 20 (60 hp): In this way the current flux is modulated in a way to increase the losses of the
motor, increasing the break torque. A better operation can be obtained with motors of smaller efficiency
(small motors).
1.2 - P0404>20(60 hp): the current flux will be increased up to the maximum value defined on P0169
or P0170, as the speed is reduced. The break torque in the weakness field area is small.
2. Without losses – set P0184=1. Activates only the DC link voltage regulation.
Table 11.8 - DC link regulation modes
The Optimal Braking is active as described at P0185. This assures the minimum possible decelera-
tion time without using dynamic or regenerative braking
Automatic control of the deceleration ramp. The Optimal Braking is inactive. The deceleration
ramp is automatically adjusted in order to keep the DC link below the level adjusted in P0185.
This procedure avoids the overvoltage fault at the DC link (F022). It can also be used with eccen-
tric loads
DIx = 24 V: Braking actuates as described for P0184=1
DIx = 0 V: The Without Losses Braking stays inactive. The DC link voltage will be controlled by
the parameter P0153 (Dynamic Braking)
29 Vector Control
96 DC Link Regulator
Vector Control
Action
Factory P0296=0: 400 V
Setting: P0296=1: 800 V
P0296=2: 800 V
P0296=3: 800 V
P0296=4: 800 V
P0296=5: 1000 V
P0296=6: 1000 V
P0296=7: 1000 V
P0296=8: 1200 V
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