Chapter 6 start and stop control
89
P6-13
DC braking current at
stop
0%
~
100%
Default
:
0%
P6-14
DC braking time at stop
0.0s
~
100.0s
Default
:
0.0s
DC braking start frequency at stop: When the inverter stops, when the running
frequency decreases to this frequency, DC braking starts.
DC brake waiting time at stop: After the running frequency is reduced to the stop DC
braking start frequency, the inverter stops output for a period of time before starting the DC
braking process. Used to prevent malfunctions such as overcurrent that may be caused by
DC braking at higher speeds.
DC braking current at stop: refers to the output current during DC braking, as a
percentage of the rated motor current. The larger the value, the stronger the DC braking
effect, but the greater the heat generated by the motor and the inverter.
DC braking time at stop: The time during which the DC braking amount is maintained.
This value is 0 and the DC braking process is cancelled. The DC braking process of the
shutdown is shown in the schematic diagram of Figure 6-13.
DC brake waiting time
Output frequency Hz
Stop DC braking start
frequency
Time t
DC brake waiting time
running
Stop DC braking
Output voltage RMS
Time t
Figure 6-13 Schematic diagram of DC braking at stop
P6-15
Brake usage rate
0%
~
100%
Default
:
100%
Only valid for inverters with built-in brake unit.
It is used to adjust the duty ratio of the brake unit. When the brake usage rate is high, the
duty ratio of the brake unit is high and the braking effect is strong. However, the voltage
of the inverter bus voltage fluctuates greatly during the braking process.
P6-18
Speed tracking
current
30%~200%
Default
:
depending
The maximum current limit of the speed tracking process is within the range of the “speed
tracking current” setting. If the set value is too small, the effect of the speed tracking will be
worse.