WEG DBW03 Serie Manual Del Usuario página 11

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.
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.
„
Frequency inverter
+UD
-UD
DBW03
+UD
-UD
Figure 2.2: Braking step
General Information
M
+UD
External
braking
resistor
BR
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