Selection of Options
‑106‑
Note
● The minimum braking resistance in the preceding table supports the operating
condition with ED of 10% and the longest time for single braking of 10s.
● The initial braking voltage can be adjusted with the grid voltage. If the default initial
braking voltage is increased, the resistance of the braking resistor must be increased.
The default initial braking voltage is 760 V for three‑phase 380 V to 480 V models and 360
V for single‑phase 200 V to 240 V models.
● The data in the preceding table is for reference only. You can select the resistance and
power of the braking resistor as required. (Note that the resistance cannot be lower than
the recommended minimum value, but the power can exceed the recommended value.)
The braking resistor model depends on the generation power of the motor in the actual
system and is also related to the system inertia, deceleration time, and potential energy
load. Select a proper braking resistor as required. A larger system inertia requires
shorter deceleration time and more frequent braking. In this case, you need to select a
braking resistor with higher power and lower resistance.
4.1.5 Output Reactor
With an output reactor installed on the output side of the AC drive, the excessive dV/
dt can be reduced, lowering the voltage stress on the motor winding. This protects
the motor winding, lowers the motor temperature, and prolongs the service life of the
motor.
Model and Dimensions (Inovance)
The models and dimensions of the recommended Inovance AC output reactors are as
follows.
Figure 4‑13 AC output reactor model
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