Application parameter group 10
PARAMETER DESCRIPTION 251
5.11.3 DC injection brake before start
Before operation, motor may be in rotating state due to external force or inertia. If inverter suddenly start operation,
the output current may be too large, causing motor damage or trigger driver protection.
Parameter
Name
Default Setting Range
Content
10-05
P.242
DC brake before
inverter start
0
0
Off.
1
Before starting operate DC brake first.
10-06
P.243
DC brake time before
inverter start
0.5s
0～60.0s
---
10-07
P.244
DC brake voltage
before inverter start
4.0%
0～30.0%
7.5K/11KF(included) and below
2.0%
11K/15KF～55K/75KF
1.0%
75K/90KF (included) and above.
DC injection brake before start
If 10-05(P.242)=0, DC brake function before start will be off. If 10-05(P.242)=1, DC brake is on, when inverter start,
it will inject DC voltage (with 10-07(P.244) value) into the motor coil to lock the rotor. DC brake will maintain for a
period of time (10-06(P.243) value) before motor starts to run.
See figure below:
Output
frequency
DC
braking
voltage
Time
Time
01-11
（
P.13
）
10-07
（
P.244
）
10-06
（
P.243
）
10-06
（
P.243
）
Setting
