Regenerative Braking Function - Omron SYSDRIVE MX2 SERIES User Manual

5-10 Brake Settings

Regenerative Braking Function

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 the overvoltage level is
exceeded, an overvoltage (OV) trip occurs.
This function is intended to prevent this problem by allowing the regenerative energy to be
consumed using an external Resistor. It is effective if you want to quickly decelerate the motor
or when the load inertia is large.
All 3G3MX2 models have a built-in regenerative braking circuit, so install only a Braking
Resistor externally to the Inverter. To use the Regenerative Braking Unit, set Regenerative
Braking Selection (b095) to "00: Disabled."b090 and b096 will be ignored.
To use the regenerative braking function, set the following conditions.
Parameter
5
b090
b095
b096
*1.The regenerative braking ON level conforms to the output voltage setting for the Inverter's internal
converter (DC unit). The regenerative braking circuit turns ON when the set voltage is exceeded. When
the Resistor consumes the energy and the voltage drops to below the ON level, the regenerative
braking circuit turns OFF.
5-141
Function
No. name
0.0
Regenerative braking does not operate.
0.1 to 100.0
The usage rate of regenerative braking can be set in
increments of 0.1%.
A trip occurs if the set usage rate is exceeded.
Usage Rate
of
Regenerative
Braking
Regenerative
braking operation
00: Disabled
01
While operating: Enabled (Regenerative braking
Regenerative
Braking
While stopped : Disabled (Regenerative braking does
Selection
02: Enabled while operating and stopped
Regenerative 330 to 380
Braking ON
660 to 760
Level
Data
t2
t1
ON ON
100 sec.
(t1+t2+t3)
Usage rate (%) =
100 sec.
operates.)
not operate.)
(Regenerative braking operates.)
*1
(200 V class)
*1
(400 V class)
SYSDRIVE MX2 Series USER'S MANUAL (3G3MX2-Axxxx)
Default
setting
0.0
t3
ON
100
00
360
720
Unit
%
−
V