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Drive output frequency is shut off
Run
Command
Output
Frequency
Motor rpm
ON
OFF
Figure 5.5 Coast to Stop
Note:
After a stop is initiated, any subsequent Run command that is entered will be ignored until the Minimum Baseblock Time (L2-03) has
expired. Do not attempt to start the motor again until it has come to a complete stop. To start the motor before it has stopped completely,
use DC Injection at start (
Refer to b2-03: DC Injection Braking Time at Start on page 129
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.
Run Command
Output Frequency
ON
OFF
DC Injection Braking
Time at Stop
(b2-04)*
Minimum Baseblock Time (L2-03)
DC Braking
Current (b2-02)
DC Injection Braking
Motor Speed
Figure 5.6 DC Injection Braking to Stop
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:
=
DC Injection brake time
b2-04 • 10 • Output frequency
Max. output frequency (E1-04)
5.2 b: Application
YASKAWA ELECTRIC SIEP C710606 18F YASKAWA AC Drive – V1000 Technical Manual
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Parameter Details