Overvoltage Suppression Function During Deceleration - Omron SYSDRIVE MX2 SERIES User Manual

5-9 Functions Relating to Protections, Warnings and Various Output Signals

Overvoltage Suppression Function During Deceleration

This function helps avoid an overvoltage trip due to regenerative energy from the motor during
deceleration.
Whether to enable or disable this function can be selected by Overvoltage Suppression
Function Selection During Deceleration (b130). If "01: Enabled (DC voltage kept constant)" is
selected, the Inverter decelerates automatically in order to keep the voltage rise in the main
circuit DC unit at the start of deceleration, to the value of Overvoltage Suppression Level
During Deceleration (b131).
If "02: Enabled (Acceleration enabled)" is selected, the Inverter will accelerate according to
the setting of Overvoltage Suppression Parameter (b132) when the voltage of the main circuit
DC unit rises at the start of deceleration and exceeds the value of Overvoltage Suppression
Level During Deceleration (b131). After that, when the main circuit DC voltage falls below the
b131 level, the Inverter starts deceleration again.
Parameter
b130
5
b131
b132
b133
b134
*1.When b130 = 01, PI control works to keep the internal DC voltage constant.
Though quicker response is expected when the setting of Proportional Gain (b133) is increased, control
tends to be divergent and this may easily lead to a trip. Response also becomes quicker when the
setting of Integral Time (b134) is decreased, but if the setting is too small the same situation may occur.
*2.If the value set in b131 is lower than the incoming voltage or equivalent, the motor may not be stopped.
5-117
Function name
No.
Overvoltage
Suppression
Function Selection
During
Deceleration
Overvoltage
Suppression Level
During
*2
Deceleration
Overvoltage
Suppression
Parameter
Overvoltage
Suppression
Proportional Gain
Setting
Overvoltage
Suppression
Integral Time
Setting
Data
00: Disabled
01: Enabled (DC voltage kept constant)
*1
(example 1)
02: Enabled (Acceleration enabled)
(example 2)
330. to 395. (200 V class)
660. to 790. (400 V class)
0.10 to 30.00
Set the acceleration rate applied when
this function is enabled.
0.00 to 5.00
Proportional gain for DC voltage constant
control (b130 = 01 only)
0.0 to 150.0
Proportional gain for DC voltage constant
control (b130 = 01 only)
SYSDRIVE MX2 Series USER'S MANUAL (3G3MX2-Axxxx)
Default
Unit
setting
−
00
380. V
760. V
1.00 s
0.20 −
1.0 S