Overexcitation Function - Omron RX2 Series User Manual

8-2-4

Overexcitation Function

[bA146] overexcitation function selection allows you to enable the overexcitation function.
The overexcitation function increases the motor loss and reduces energy to be regenerated in order to
suppress the overvoltage and prevent tripping.
Precautions for Correct Use
• When this function is enabled, the current may increase as the output voltage increases.
• When using this function, the motor will be overexcited and the heat generated by the motor
may increase.
• Depending on the deceleration rate or load status, the overvoltage tripping may be triggered
even if this function is enabled.
• The overexcitation function is activated when controlling VC characteristics of V/f control, VP
characteristics, and free V/f control.
 Parameter
Item
Over magnetization
deceleration function
selection, 1st_motor
Over magnetization
output filter time
constant, 1st_motor
Over magnetization
voltage gain,
1st_motor
Over magnetization
level setting,
1st_motor
High-function General-purpose Inverter RX2 Series User's Manual
Parameter Data
00
01
[bA146] 02
03
04
[bA147] 0.00 to 1.00(s)
[bA148] 50 to 400(%)
200 V class:
330.0 to 400.0 (V)
[bA149]
400 V class:
660.0 to 800.0 (V)
Description
Disabled
Always active
Active only during deceleration
Level operation
Level operation during deceleration
Filter time constant applied to the overexci-
tation output.
Gain for the overexcitation output voltage.
The level at which the overexcitation func-
tion starts its operation.
8 Applied Settings
Default
data
02
0.30
100
(200V
class)
360.0
(400V
class)
720.0
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