KEB COMBIVERT F4-C Applications Manual page 174

Functional Description
DC-link Setpoint Value
(Pn.42)
DC-link P-component
(Pn.34)
Active Current Control
P-component (Pn.36)
I-component (Pn.37)
Braking Torque (Pn.18)
Chapter Section Page
6 9 10
199 At this setting the DC-link setpoint value is equal to the tripping level Pn.
17. An immediate restart upon voltage recovery is possible.
200...800 Manual setting of the DC-link setpoint voltage in volt. At this setting the
drive decelerates even upon voltage recovery to standstill (dependent
on Pn.33 Bit 5).
To ensure a save operation the internal value is limited. The value of the
DC-link voltage for normal operation plus approx. 50V adjusts itself as
minimum value.
If a braking resistor is connected the adjusted value may not be above
the operating point of the braking transistor, since the controller would
not work in that case (operating point 200V-class: 370V; 400V-class:
740V).
To adapt the drive individually to the application, the proportional coupling factor of
the DC-link voltage controller can be adjusted. In most cases the standard setting will
function. However, if overshootings occur or stalling of the motor the value must be
decreased.
With the active current control Pn.36 and Pn.37 an adaption to the application can be
made, where the standard setting would not be sufficient. For such cases no adjustment
aid can be given since it strongly depends on the application. But in most cases the
controller work sufficiently with the standard setting and a change is not needed.
Serves for the adjustment of the braking torque when the drive shall be decelerated
quickly in case of power failure. For it a braking module is required.
0 At this setting the DC-link control is active.
0,1...100,0% Manual setting of setpoint value for the active current control. The
DC-link control is deactivated at this setting.
Date
Name: Basis Name: Basis
KEB COMBIVERT F4-C
29.01.98
Special Functions
© KEB Antriebstechnik, 1997
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