Regenerative Braking Unit And Braking Resistor Combination Selection Table - Omron RX2 Series User Manual

11-4 Regenerative Braking Unit and Braking
Resistor Combination Selection Table
Select the combination of the regenerative braking unit(s) and the braking resistor(s) as follows,
according to your inverter.
If the usage rate exceeds 10% ED, or if you need a torque larger than the approximate braking torque,
you need to follow the instruction provided in A-3 Overview of Inverter Selection on page A-25.
• Inverter:
Select the model of your inverter.
The table below assumes that your inverter is used in the heavy load mode and connected to a single
motor with the same capacity.
Make sure that the approximate braking torque in the table shows the assumed value per a motor
with the same capacity at ND mode. When using this inverter at LD or VLD mode, you need to calcu-
late the torque value by dividing VLD by ND.
• Operating conditions:
Show the torque during deceleration and the deceleration time (in % ED) calculated as a percentage
of the cycle time for 1 cycle of operation including the stop time.
• Braking unit/Braking resistor:
Show the required model and number of units.
• Connection form:
Shows the configuration of the regenerative braking unit(s) and braking resistor(s) illustrated in the
connection form table below.
• Restrictions:
Show the maximum deceleration time allowable for the combination shown here and the minimum
resistance that can be connected to the inverter's built-in regenerative braking circuit or external
regenerative braking unit(s).
Inverter
Max.
applica-
Voltage
ble motor Model
class
capacity
[kW]
3G3RX2-
0.4
A2004
3G3RX2-
0.75
A2007
200-V
class
3G3RX2-
1.5
A2015
3G3RX2-
2.2
A2022
High-function General-purpose Inverter RX2 Series User's Manual
Operating condi-
Braking unit
tions
Approximate
%ED
braking Model
[%]
torque [%]
3% 220%
Built into
unit
10.0% 220%
3.0% 120%
Built into
unit
10.0% 120%
2.5% 110%
Built into
unit
10.0% 215%
3.0% 150%
Built into
unit
10.0% 150%
Braking resistor
Connection
No. No.
of Model of
units units
3G3AX-
– 1 1
RBA1201
3G3AX-
– 1 1
RBB2001
3G3AX-
– 1 1
RBA1201
3G3AX-
– 1 1
RBB2001
3G3AX-
– 1 1
RBA1202
3G3AX-
– 1 1
RBC4001
3G3AX-
– 1 1
RBB3001
3G3AX-
– 1 1
RBC4001
11 Options
Restrictions
Allowable Min. con-
form
continu- nection
ous ON resistance
time [s] []
20 50
30 50
20 50
30 50
12 35
10 35
30 35
10 35
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