Dc Braking - Toshiba TOSVERT VF-PS1 Instruction Manual

Output frequency [Hz]
DC braking start frequency

Output current [A]
Operation signal (F-CC)
<DC braking start conditions>
The forward/reverse DC braking priority control function  recognizes certain conditions such as stop
commands from the inverter, and is activated when the output frequency goes down below the DC braking start
frequency set with  . In this case, the conditions under which DC braking starts include not only the issue of a
start or stop command from the operation panel or an external input device, but also a fall in the reference
frequency below the value set with  (stop frequency setting) or a fall in the output frequency below the
operation stop frequency setting  .
6
[DC braking under normal conditions] (Forward/reverse run DC braking priority control  =  [Disabled])
Output frequency [Hz]
Set frequency

Reference frequency


Operation signal (F-CC)
(1) If  and  > reference frequency
(2) If  > reference frequency > 
If  and  > reference frequency
(3) If an operation command is entered during DC braking : DC braking is discontinued to restart the operation.
Set frequency
0
0

0
(1)
0
Note:During DC braking, the DC braking
current may be adjusted
automatically to prevent the overload
LED display
protection function from being
 displayed
activated and causing the inverter to
trip.

DC braking

The DC braking current may be
adjusted automatically to prevent
tripping.
When the inverter is used with a
standard motor, setting the
percentage of DC braking ()
above 60% may activate the thermal
protection function to prevent the
motor from being overloaded,
Time [s] depending on the setting of 
(DC braking time).
DC braking current

DC braking time
ON
OFF

(2) (2)
: DC braking
: Operation at the command frequency
: DC braking
F-14
E6581386

: DC braking

Time [s]
(3)
ON
OFF