1.2 b: Application
48
YASKAWA ELECTRIC
SIEP C710606 10A YASKAWA AC Drive - V1000 PRELIM. Programming Manual
Figure 1.12
Figure 1.12 DC Injection Braking during Deceleration
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b2-02: DC Injection Braking Current
Sets the DC Injection Braking current as a percentage of the drive rated current. If set to
larger than 50%, the carrier frequency is automatically reduced to 1 kHz.
The level of DC Injection Braking current affects the strength of the magnetic field
attempting to lock the motor shaft. Increasing the current level will increase the amount of
heat generated by the motor windings. This parameter should only be increased to the level
necessary to hold the motor shaft.
■
b2-03: DC Injection Braking Time at Start
Sets the time of DC Injection Braking at start. It can be used to stop a coasting motor before
restarting it or to apply a braking torque at start. Disabled when set to 0.00 s.
Note:
Before starting an uncontrolled rotating motor (e.g. a fan motor driven by windmill effect), DC
Injection or Speed Search should be used to either stop the motor or detect its speed before
starting it. Otherwise motor stalling and other faults can occur.
■
b2-04: DC Injection Braking Time at Stop
This parameter works in combination with b2-01, and sets the DC Injection Braking time at
stop. Used to completely stop a motor with high inertia load after ramp down. Increase the
setting if the motor tends to coast by inertia after a stop.
<1> The upper limit for the setting range is determined by E1-04.
No.
Name
Setting Range
Default
b2-02
DC Injection Braking Current
0 to 75%
50%
No.
Name
Setting Range
Default
b2-03
DC Injection Braking Time at Start
0.00 to 10.00 s
0.50 s
b2-04
b2-01 DC Injection braking
start frequency
Output
frequency
Time
Содержание OYMC V1000
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