Filter
Top Products
F-29
6.13.5 Avoiding over-voltage trip
Over-voltage stall protection
Over-voltage stall protection level (high response)
Over-voltage stall protection level
[Parameter setting]
Title Function Adjustment range Default setting
Over-voltage stall protection
: Enabled, : Disabled,
: Enabled (forced quick deceleration)
Over-voltage stall protection level
(high response)
[%] (*2)
Over-voltage stall protection level (*1)
[%] (*2)
(*1) serves also as the level of dynamic (regenerative) braking operation.(Refer to 6.13.4)
(*2) 100% (200V class = 200 2 [V], 400V class = 400 2 [V])
6.13.6 Adjusting the output voltage and voltage compensation
Voltage of base frequency(output voltage adjustment)
Selection of base frequency voltage(voltage compensation)
Voltage compensation... The V/f ratio is kept constant even at input voltage fluctuation.
Voltage limitation ... The output voltage is limited to . If the voltage compensation fun
ction is disabled, no limitation is imposed to the output voltage.
[Parameter setting]
Title Function Adjustment range Default setting
Base frequency voltage #1
(output voltage adjustment)
[V]
[V]
/ [V]
Base frequency voltage
(voltage compensation)
:
without voltage compensation(limitless output voltage)
:
with voltage compensation(limitless output voltage)
:
without voltage compensation(limited output voltage)
:
with voltage compensation(limited output voltage)
If is set at or , the output voltage varies with the input voltage.
The output voltage does not exceed the input voltage, even if the base frequency voltage
() is set above the input voltage
.
Function
The functions automatically keep constant or increase the output frequency to prevent
tripping due to over-voltage in the DC bus during deceleration or constant-speed run. When
the over-volta
g
e stall protection is active, it ma
y
take lon
g
er than the deceleration time.
Function
Voltage of base frequency (output voltage adjustment)
This parameter set the base frequency voltage. And this parameter can make it so that no
voltage exceeding the value is put out. (This function is active when is set or .)
Selection of base frequency voltage (voltage compensation)
The function keeps the V/f ratio constant for prevention of torque drop at low speeds
even when the input voltage drop.
Over voltage stall protection level (high response)
:
Over voltage stall protection level
:
Real deceleration time (differ from regenerative power)
DC voltage
Output frequency
Set deceleration time
Maximum frequency
If DC voltage rise and reach the level set
up by , output frequency will be
controlled in order to control this rise. If DC
voltage rise more and reach the level set
up by , this control operation is
p
erformed with hi
g
h res
p
onse.