Omron SYSDRIVE MX2 SERIES, User Manual

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7 Other Functions
7 - 42 Multi-function Compact Inverter 3G3MX2-V1 User’s Manual (I585-E1)
Use this function to have the inverter automatically compensate for the output voltage to the motor even
if the incoming voltage fluctuates.
It is useful as a preventive measure against low output torque to the motor or overexcitation.
Note, however, that the inverter cannot output voltage exceeding the incoming voltage to the inverter.
To enable/disable the AVR (Automatic Voltage Regulator) function, set the 1st/2nd AVR Selection (A081/A281).
• The inverter will output voltage to the motor according to the value set in the 1st/2nd Motor Rated
Voltage Selection (A082/A282).
Note, however, that the inverter cannot output voltage exceeding the incoming voltage to the inverter.
• By default, this parameter is set to 02 (OFF during deceleration) to enable the inverter to output a
large deceleration torque during deceleration.
To avoid possible overcurrent trip during deceleration, set the 1st/2nd AVR Selection (A081/A281) to
00 (Always ON).
This function decreases the regenerative energy to be fed back to the inverter by forcing the motor dur-
ing deceleration to be in an overexcited state.
It enables you to shorten the deceleration time without use of optional braking resistors.
• To use this function, set the Overvoltage Suppression Function Selection During Deceleration (b130)
to 00 (Disabled).
• Set the 1st/2nd AVR Selection (A081/A281) to 00 (Always ON).
• Setting the AVR Gain at Deceleration (A084) to higher than 100% enables the adjustment of the
motor in an overexcited state.
Set this as a percentage of the 1st/2nd Motor Rated Voltage Selection (A082/A282) value.
• AVR Filter Time Constant (A083) is a parameter to set the filter time constant to adjust the responsiveness
of the AVR (Automatic Voltage Regulator).
7-5-11 AVR (Automatic Voltage Regulator) Function
AVR (Automatic Voltage Regulator) Function Settings
Parameter
No.
Function name Data
Default
data
Unit
A081/A281 1st/2nd AVR Selection
00: Always ON
02
− 01: Always OFF
02:
OFF during deceleration
*1
*1. This setting decreases the energy to be fed back to the inverter by increasing the motor loss.
It is effective when you need to reduce the deceleration time.
However, to avoid possible overcurrent tripping during deceleration, set the 1st/2nd AVR Selection to 00 (Al-
ways ON).
A082/A282
1st/2nd Motor Rated Volt-
age Selection 200 V: 200 to 240
200 or 400 V
400 V: 380 to 480
Overexcitation Control during Deceleration
Parameter
No.
Function name Data
Default
data
Unit
b130
Overvoltage Suppression
Function Selection During
Deceleration 00: Disabled
01
*1
*1. The default data was changed from the previous model.
−
A081/A281 1st/2nd AVR Selection 00: Always ON 02
−
A082/A282
1st/2nd Motor Rated Volt-
age Selection
200 V: 200 to 240
200 or 400 V
400 V: 380 to 480
A083 AVR Filter Time Constant 0.000 to 10.00 0.300 s
A084 AVR Gain at Deceleration 50. to 200. 100. %