Yaskawa Matrix Converter - Manual (Page 180)

Stopping Methods
6-
15
‹ Using DC Injection Braking
Set parameter b2-03 to apply DC Injection Braking current to the motor while it is coasting to stop. This
allows the MxC to stop the motor more quickly than simply allowing it to coast, and also to restart the motor
again.
Set b2-03 to 0 to disable DC Injection Braking at start.
Set the DC injection braking current using b2-02. DC injection braking is used at start up in Flux Vector Con-
trol with the current set in E2-03 (Motor No-Load Current).
„ Related Parameters
„ Inputting DC Injection Braking Command from Control Circuit Terminals
If a multi-function digital input terminal (H1-††) is set to 60 (DC Injection Braking Command), DC Injec-
tion Braking can be applied to the motor is applied by enabling the terminal for which DC Injection Braking
Command has been set when the MxC is being stopped. DC Injection Braking is used at startup in Flux Vector
Control.
The time chart for DC Injection Braking is shown below.
Fig 6.17 DC Injection Brake Time Chart
Parameter
Number
Name
Description
Setting
Range
Default
Change
during
Run
Control Methods
Display V/f
Open
Loop
Vector
Flux
Vector
b2-02
DC Injection Brak-
ing Current Sets the DC Injection Braking current as a
percentage of the MxC rated current.
Note: The DC excitation current is deter-
mined by the setting in E2-03 when
operating in Flux Loop Vector Control
Method.
0 to
100
50% No A A No
DCInj Current
b2-03
DC Injection Brak-
ing Time/DC Exci-
tation Time at Start Sets the time of DC Injection Braking at start
in units of 0.01 seconds.
0.00
to
10.00
0.00 s No 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 Braking Command
FRUN
Output frequency
DC injection brake
(DC injection braking at
startup is used for flux
vector control.)
If you input DC Injection Braking Command from an external terminal, or if the Run Command
and Jog Command are input, DC Injection Brake will be disabled, and operation will resume.