Regenerative Power Ride-Through Control/Deceleration Stop During Power Failure - Toshiba TOSVERT VF-AS1 Instruction Manual

5.18.2 Regenerative power ride-through control/Deceleration stop during power failure/Synchronized acceleration/deceleration

 : Non-stop control time/Deceleration time during power failure
 : Synchronized deceleration time
 : Synchronized acceleration time
 : Under voltage detection level
 : Regenerative power ride-through control level
• Function
1) Regenerative power ride-through control: When momentary power failure occurs during operation, this
2) Deceleration stop during power failure:
3) Synchronized acceleration/deceleration: When the inverter is used with textile machines, this function
[Parameter setting]
Title
5






Note 1: The power ride-through control time when = depends on the setting of , and the
deceleration time when = depends on the setting of .
Also, the deceleration time and the acceleration time when = or  depend on the setting of
 and that of , respectively.
Note 2: Even if these functions are used, a motor may coast according to load conditions.
In this case, use the auto-restart function along with this parameter function.
Note 3: These functions do not operate at the time of torque control or position control.
Note 4: Jog run function doesn't operate at synchronized acceleration/deceleration.
Note 5: Although the setting of  can be written when  is set to  (non-stop control), it cannot be
written when  is set to  (momentary power failure slowdown stop).
Note 6: For the parameter  100% corresponds to 575V (Default setting) or 500V ( =) or
690V (=).
An example of setting when =
[When power is interrupted]
Input voltage
Motor speed
Note: If power is interrupted
during deceleration stop,
power ride-through control
will not be performed.
: Regenerative power ride-through control
Function
Regenerative power ride-through
control selection
Non-stop control time/Deceleration
time during power failure
Synchronized deceleration time
Synchronized acceleration time
Under voltage detection level
Regenerative power ride-through control
level
Coasting time
Several hundreds of milliseconds
to several tens of seconds.
function makes operation continue using the regeneration
energy from a motor.
When momentary power failure occurs during operation, this
function stops the motor quickly compulsorily. A forcible stop is
carried out in  (Deceleration time) using the
regeneration energy from the motor.
(Deceleration time varies with control.)
After the forced stop, the inverter remains static until you put off
the operation command momentarily.
stops more than one textile machine simultaneously in the
event of a momentary power failure and it prevents the
breakage of yarns around bobbins at the recovery from the
power failure.
Adjustment range
:Disabled
:Power ride-through
: Deceleration stop during power failure:
:Synchronized deceleration/acceleration
(synchronized acceleration/deceleration signal)
:Synchronized deceleration/acceleration
(synchronized acceleration/deceleration
signal+power failure)
~ sec.
~ sec.
~ sec.
~ %, : Automatic mode
~ %
The time for which the operation of the motor
can be continued depends on the machine
inertia and load conditions. Before using this
function, therefore, perform verification tests.
Use with the retry function allows the motor to
be restarted automatically without being
brought to an abnormal stop.
E-34
E6581528
Default setting




According to
voltage class
⇒ Refer to
page K-23.
