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E6581528
E-34
5
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
: Under voltage detection level
: Regenerative power ride-through control level
[Parameter setting]
Title Function Adjustment range Default setting
Regenerative power ride-through
control selection
: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)
Non-stop control time/Deceleration
time during power failure
~ sec.
Synchronized deceleration time ~ sec.
Synchronized acceleration time ~ sec.
Under voltage detection level
~ %, : Automatic mode
According to
voltage class
⇒ Refer to
page K-23.
Regenerative power ride-through control
level
~ %
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]
Motor speed
Several hundreds of milliseconds
to several tens of seconds.
Input voltage
Coasting time
Note: If power is interrupted
during deceleration stop,
power ride-through control
will not be performed.
• Function
1) Regenerative power ride-through control: When momentary power failure occurs during operation, this
function makes operation continue using the regeneration
energy from a motor.
2) Deceleration stop during power failure: 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.
3) Synchronized acceleration/deceleration: When the inverter is used with textile machines, this function
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
p
ower failure.
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.