WEG DBW03 Series, User Manual, Page: 10 / 96

DBW03 | 11
General Information
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ng
lis
h
In the next step, it is necessary to reduce the motor speed. The motor becomes a
generator and the power is returned to the DC link.
In order to avoid overvoltage, the energy is dissipated in a resistor by using the dynamic
braking module, as shown in figure 2.2.
Frequency inverter
DBW03
M J
+UD
+UD
BR
-UD
-UD
External
braking
resistor
+UD
Figure 2.2: Braking step
The DBW03 dynamic braking module has the following characteristics:
„
Supply of the electronics obtained directly from the DC link.
„
Digital control.
„
Self-contained operating mode.
„
Slave operating mode.
„
Disabling via external control.
„
Braking resistor temperature monitoring via thermostat.
„
Ground fault monitoring.
„
Module status signaling via LEDs.
„
Relay outputs for fault indication.