Automatic Voltage Regulation (Avr) Function - Hitachi WJ200 Series Instruction Manual

Automatic Voltage Regulation (AVR) Function

The automatic voltage regulation (AVR) feature keeps the inverter output waveform at
a relatively constant amplitude during power input fluctuations. This can be useful if
the installation is subject to input voltage fluctuations. However, the inverter cannot
boost its motor output to a voltage higher than the power input voltage. If you enable
this feature, be sure to select the proper voltage class setting for your motor.
Func.
Name
Code
AVR function select
A081
AVR function select,
a281
2 motor
nd
AVR voltage select
A082
AVR voltage select,
a282
2 motor
nd
AVR filter time constant
a083
AVR deceleration gain
a084
Note: The motor behave as generator during deceleration and the energy is regenerated to
the drive. As a result, the DC voltage in the inverter increases and cause over-voltage
trip when exceeding the OV level. When the voltage is set high, deceleration time can
be set shorter thanks to the energy consumption due to the incensement of loss in
inverter. In order to set deceleration time shorter without over-voltage trip, please try
to set AVR off during deceleration or to tune the AR filter time constant and AVR
deceleration gain.
"A" Function
Description
Automatic (output) voltage
regulation, selects from three
type of AVR functions, three
option codes:
00...AVR enabled
01...AVR disabled
02...AVR enabled except
during deceleration
200V class inverter settings:
......200/215/220/230/240
400V class inverter settings:
......380/400/415/440/460/480
Define the time constant of the
AVR filter, range is 0 to 10 sec.
Gain adjustment
braking performance, range is
50 to 200%
Run
Mode
Lnitial data
Edit
200/
400
200/
400
0.300
of the
100.
3−35
Defaults
Units
02 −
02 −
V
V
sec
%