Toshiba VF-SX - Manual (Page 111)

11-4
TOSHIBA
11.2 DC Injection Braking Start-up Frequency [ c / b f ] ,
DC Injection Braking Voltage [c/bu], and DC Injection
Braking Time [ c / b b ]
The inverter can be stopped by using DC injection Braking during decelerating
stop. The LED display will show [ d b ] when the DC injection braking function
is operating. Simple positioning is possible using DC injection braking.
The DC injection braking start-up frequency [
d b F ]
can be set between 0 to
10 HZ. If [ d
b F
] I s set to a value other than 0, the DC injection braking
voltage [
d b U ]
can be set between 0% and 20%, and the DC Injection braking
time [ d b b ] can be set between 0 and 5 seconds.
An example of DC injection braking operation is shown in Figure 11.1.
If the F switch is turned OFF, the motor will decelerate with regenerative
braking according to the deceleration time set with
[ d E C ] ,
and the DC
injection braking will be activated with the DC injection braking start-up
frequency set with [ d b F ] , Then the motor will stop.
Output
Frequency
Output
Voltage
(actual
value)
DC Injection Braking
Startup Frequency
DC Injection
Braking Voltage
DC Injection
Braking Time
Figure 11.1 (a) Example of DC Injection Braking Operation
with [dbv] NOT set to 0