Toshiba TOSVERT VF-AS1 Instruction Manual page 99

5.18.2 Regenerative power ride-through control/Deceleration stop during power failure/Synchronized acceleration/deceleration
: Regenerative power ride-through control
: Non-stop control time/Deceleration time during power failure
: Synchronized deceleration time
: Synchronized acceleration time
: 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 used with bobbin winders for textile machines, for
[Parameter setting]
Title
Regenerative power ride-through
control selection
Non-stop control time/Deceleration
time during power failure
Synchronized deceleration time
Synchronized acceleration time
Regenerative power ride-through control level
Note 1: The power ride-through control time when
time when
Also, the deceleration time and the acceleration time when
and that of
Note 2: Even if these functions are used, a motor may free run 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 can be written into memory if
written if
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.
[If momentary power failure occurs]
Input voltage
Motor speed
Non-stop control
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
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.
example, to prevent yarns from breaking in the event of a
momentary power failure or after the recovery from a power
failure, this function stops multiple machines simultaneously or
makes them reach their respective command frequencies
simultaneously by regulating their deceleration time or
acceleration time.
Function
:Disabled
:Power ride-through
: Deceleration stop during power failure:
:Synchronized deceleration/acceleration
:Synchronized deceleration/acceleration
= depends on the setting of
, respectively.
is set to (deceleration stop during a power failure).
=
Coasting time
Several hundreds of milliseconds
to several tens of seconds.
Normal acceleration
E-33
(Deceleration time) using the regeneration
Adjustment range
(synchronized acceleration/deceleration
signal)
(synchronized acceleration/deceleration
signal+power failure)
~ sec.
~ sec.
~ sec.
~ %
= depends on the setting of
.
= or depend on the setting of
is set to (power ride-through control), it cannot be
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.
E6581301
Default setting
5
, and the deceleration