Parameter Description
Parameters
63
5.7 DC Injection Brake (P.10, P.11 and P.12)
P.10 “DC injection brake operation frequency”
P.11 “DC injection brake operation time”
P.12 “DC injection brake operation voltage”
Parameter
Factory setting
Setting range
Remarks
10
3Hz
0~120Hz
---
11
0.5s
0~60s
---
12
4% (7.5kW or below)
0~30%
---
2%(11kW~55kW)
1% (75kW or above)
<Setting>
• After a stop signal is put in (please refer to Chapter 4 for the primary operation of motor
activation and stop), the output frequency of the inverter will decrease gradually. In case
the output frequency reaches the “DC injection brake operation frequency (P.10),” the DC
injection brake will be activated.
• During DC injection brake, a DC voltage will be injected into the motor windings by the
inverter, which is used to lock the motor rotor. This voltage is called “DC injection brake
operation voltage (P.12)”. The larger the P.12 is, the higher the DC brake voltage is, and
the stronger the brake capability is.
• The DC brake operation will last a period (the set value of P.11) to overcome the motor
inertia.
See the figure below:
P.12
Time
P.11
Output
frequency
(
Hz
)
P.10
DC
braking
voltage
Time
Stop signal input
Note: To achieve the optimum control characteristics, P.11 and P.12 should be set properly.