Yaskawa G7 Drive - Manual (Page 230)

Stopping Methods
6-
13
‹ Using the DC Injection Brake
Set parameter b2-03 to apply the DC injection brake voltage to the motor while it is coasting to a stop, to stop
the motor and then restart it.
Set b2-03 to 0 to disable the DC injection brake at start.
Set the DC injection brake current using b2-02. DC injection braking is used at startup for flux vector control
with the current set in E2-03 (Motor no-load current).
„ Related Parameters
„ Inputting the DC Injection Brake Command from Control Circuit Terminals
If you set a multi-function contact input terminal (H1-††) to 60 (DC injection brake command), you can
apply the DC injection brake to the motor by turning ON the terminal for which the DC injection brake com-
mand has been set when the Drive is being stopped. DC injection braking is used at startup for flux vector con-
trol.
The time chart for the DC injection brake is shown below.
Fig 6.16 DC Injection Brake Time Chart
Parameter
Number
Name
Description Setting
Range
Factory
Setting
Change
during
Operation
Control Methods
Display V/f
V/f
with
PG
Open
Loop
Vector
1
Flux
Vector
Open
Loop
Vector
2
b2-02
DC Injection
Braking
Current Sets the DC injection braking
current as a percentage of the
Drive rated current.
Note: The DC excitation current
is determined by the setting in E2-
03 when operating in flux loop
vector control mode.
0
to
100
50% No A A A No No
DCInj Current
b2-03
DC Injection
Braking Time/
DC Excitation
Time at Start
Sets the time of DC injection
braking at start in units of 0.01
seconds. 0.00
to
10.00
0.00sec No A A A A A
DCInj
Time@Start
DC injection brake
(DC injection braking at
startup is used for flux
vector control.)
E1-09 b2-01
DC injection brake command
FRUN
Output frequency
DC injection brake
(DC injection braking at
startup is used for flux
vector control.)
If you input the DC injection brake command from an external terminal, or if the run command
and jog command are input, the DC injection brake will be disabled, and operation will
resume.