Avr Function - Omron SYSDRIVE MX2 SERIES User Manual

5-2 Basic Functions

AVR Function

This function outputs voltage to the motor correctly even if the incoming voltage to the Inverter
fluctuates.
The output voltage to the motor is based on the voltage selected by motor incoming voltage
selection. Note, however, that a voltage exceeding the incoming voltage cannot be output.
AVR Filter Time Parameter/Voltage Gain During Deceleration
During deceleration, the motor functions as a generator and the generated energy is returned
to the Inverter. As a result, the Inverter's DC voltage rises and if it exceeds the overvoltage
level, an overvoltage (OV) trip occurs. Setting a higher output voltage increases the motor loss
and energy consumptions, and consequently shortens the deceleration time. (However, the
motor load increases.)
To shorten the deceleration time without causing an overvoltage trip, select OFF for AVR
selection during deceleration for or tune the voltage characteristics using the AVR filter time
parameter and voltage gain during deceleration.
Parameter
A081/A281
5
A082/A282
A083
A084
*1.The deceleration time can be shortened by increasing the motor loss during deceleration and thereby
reducing the regenerated energy returned to the Inverter. If the location of AC incoming voltage is away
from the location of motor incoming voltage, however, an overcurrent trip may occur during
deceleration. In this case, make adjustment by, for example, selecting "Always ON" for AVR Selection.
Output voltage
Motor incoming
voltage selection
5-27
Function name
No.
AVR Selection 1/2
Motor Incoming Voltage
Selection 1/2
AVR Filter Time
Parameter
AVR Deceleration
Voltage Gain
AC incoming voltage
Output voltage when the
AVR selection is ON
Data
00: Always ON
01: Always OFF
02: OFF during deceleration
200V class: 200/215/220/230/240
400V class: 380/400/415/440/460/
480
0.000 to 10.00
50. to 200.
Output voltage
Motor incoming
voltage selection
(A082/A282)
Start deceleration
Time (s)
Example of setting the AVR Selection OFF during deceleration (A081 = 02)
SYSDRIVE MX2 Series USER'S MANUAL (3G3MX2-Axxxx)
Default
Unit
setting
02
*1
200
400
0.300
100.
AVR Filter Time Parameter (A083) = 0
AVR Deceleration
Large
Voltage Gain (A084)
Small
Time (s)
−
V
s
%