97
DETAILED PARAMETER DESCRIPTION
Range
[Factory Setting]
Parameter Unit Description / Notes
P300 0.0...15.0s
DC Braking [ 0.0 ]
Time 0.1s
P301 0.00...15.00Hz
DC Braking [ 1.00Hz ]
Start Frequency 0.01Hz
P302 0.0...130%
DC Braking [ 0.0% ]
Current 0.1%
The DC braking feature provides a motor fast stop via DC current
injection.
The applied DC braking current, that is proportional to the braking
torque, is set at P302, and is adjusted as a percentage (%)
relating to the rated inverter current.
The figures below show the DC branking operation at the two possible
conditions: ramp disabling and general disabling.
P301
P300
DEAD
TIME
open
Time
DI - Start/Stop
0V
DC CURRENT
INJECTION
Figure 6.21 - DC braking after ramp disabling
P300
open
Time
DEAD TIME
DC CURRENT
INJECTION
DI - General Enable
Figure 6.22 - ADC braking after general disabling
Motor Speed
Output Frequency
0V
Before DC braking starts, there is a "Dead Time" (motor runs freely)
required for the motor demagnetization. This time is function of the
motor speed at which the DC braking occurs.
During the DC braking the LED display flashes .
If the inverter is enabled during the braking process, this process
will be aborted and motor operates normally.
DC braking can continue its braking process even after the motor
has stopped. Pay special attention to the dimensioning of the motor
thermal protection for cyclic braking of short times.
In applications where the motor current is lower than the rated
inverter current, and where the braking torque is not enough for
the braking condition, please contact WEG to optimize the
settings.
Motor Speed
Output Frequency
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