Omron 3G3MX2-A2002-EV2 - Measures against Overvoltage; Overvoltage Suppression Function During Deceleration

5 Basic Settings
5 - 62
Multi-function Compact Inverter 3G3MX2-EV2 User’s Manual (I666-E1)
5-12 Measures against Overvoltage
5-12-1 Overvoltage Suppression Function during Deceleration
• Use this function to prevent overvoltage trip caused by the regenerative energy from the motor during
deceleration.
• Enable or disable the function in the Overvoltage Suppression Function Selection During Decelera-
tion (b130). The default data is set to 01 (Enabled: DC voltage kept constant).
• If the Overvoltage Suppression Function Selection During Deceleration (b130) is set to 01 (Enabled:
DC voltage constant control), the inverter decelerates automatically while keeping the main circuit
DC voltage rise due to deceleration start at the Overvoltage Suppression Level During Deceleration
(b131).
• If the Overvoltage Suppression Function Selection During Deceleration (b130) is set to 02 (Enabled:
Acceleration enabled), the inverter starts accelerating according to the Overvoltage Suppression Param-
eter During Deceleration (b132) setting when the main circuit DC voltage increases due to the start of
deceleration to exceed the Overvoltage Suppression Level During Deceleration (b131). After that, when
the main circuit DC voltage falls below the value set in b131, the inverter starts deceleration again.
• To use this function, set the Usage Rate of Regenerative Braking (b090) to 0.0 (Regenerative braking
not active) and the Regenerative Braking Selection (b095) to 00 (Disabled).
Parameter
No.
Function name
Data
Default data
Unit
b130
Overvoltage Suppression Func-
tion Selection During Deceleration
00: Disabled
01: Enabled (DC voltage kept
constant) (Example 1)
*1
02: Enabled (Acceleration
enabled) (Example 2)
01
−
b131
Overvoltage Suppression Level Dur-
ing Deceleration
*2
200-V class: 330. to 400.
400-V class: 660. to 800.
380./760.
V
b132
Overvoltage Suppression Parame-
ter During Deceleration
0.10 to 30.00:
Set the acceleration rate for the
output frequency when the over-
voltage suppression during
deceleration function is enabled.
Set the acceleration time from 0
Hz to the maximum frequency.
1.00
s
b133
Overvoltage Suppression Propor-
tional Gain During Deceleration
0.00 to 5.00:
Proportional gain for DC voltage
constant control (b130 = 01 only)
0.20
−
b134
Overvoltage Suppression Integral
Time During Deceleration
0.0 to 150.0:
Integral time when DC voltage is
kept constant (b130 = 01 only)
1.0
s
b090
Usage Rate of Regenerative Brak-
ing
0.0: Regenerative braking not
active
0.0
%
b095
Regenerative Braking Selection
00: Disabled
0.0
−
*1. When b130 is set to 01, PI control works to keep the internal DC voltage constant.
Although increasing the Overvoltage Suppression Proportional Gain During Deceleration (b133) provides a
faster response, setting it to an excessive large value may cause an overcurrent trip.
Increasing the Overvoltage Suppression Integral Time During Deceleration (b134) also provides a faster
response, but setting it to an excessive small value may cause an overcurrent trip.
*2. If b131 is set to a value less than the input voltage, the inverter may not be able to stop the motor. Normally,
do not set this value to 350 V or less for 200-V class and 700 V or less for 400-V class.