YASKAWA V1000 Technical Manual page 121

Setting 2: DC Injection Braking to Stop
When the Run command is removed, the drive will baseblock (turn off its output) for the minimum baseblock time (L2-03).
Once the minimum baseblock time has expired, the drive will brake the motor by injecting DC current into the motor
windings. The stopping time will be reduced as compared to coast to stop. The level of DC Injection current is set by
parameter b2-02 (default = 50%).
Note: This function is not available when using PM Open Loop Vector.
The time for DC Injection Braking is determined by the value set to b2-04 and by the output frequency at the time the Run
command is removed. It can be calculated by:
Note: If an overcurrent (oC) fault occurs during DC Injection Braking to stop, lengthen the minimum baseblock time (L2-03) until the fault
no longer occurs.
Setting 3: Coast to Stop with Timer
When the Run command is removed, the drive will turn off its output and the motor will coast to stop. If a Run command
is input before the operation wait time t expires, the drive will not rotate the motor and the Run command will need to be
cycled before operation can occur.
Run Command
Output Frequency
YASKAWA ELECTRIC SIEP C710606 16C YASKAWA AC Drive – V1000 Technical Manual
Run Command
ON
Output Frequency
DC Injection Braking
Motor Speed
Figure 5.6 DC Injection Braking to Stop
DC Injection brake time
DC Injection braking time
b2-04×10
b2-04
Output frequency when
10%
Stop command was entered
Figure 5.7 DC Injection Braking Time Depending on Output Frequency
ON
Drive output voltage
interrupted
Figure 5.8 Coast to Stop with Timer
OFF
Minimum Baseblock Time (L2-03)
DC Injection Braking
DC Braking
Time at Stop
Current (b2-02)
(b2-04)*
b2-04 • 10 • Output frequency
=
Max. output frequency (E1-04)
100%
(Maximum output
frequency)
OFF ON
Operation Wait Time t
5.2 b: Application
OFF ON
5
121