4-51
4-4 Regenerative Energy Absorption
4
System Design
Combining External Regeneration Resistors
*1. Select a combination that has an absorption capacity greater than the average regeneration
power (Pr).
*2. Do not use a combination with resistance values lower than the minimum value of regeneration
resistance of each Servo Drive. For information on the minimum value of regeneration
resistance, refer to Servo Drive Regenerative Energy Absorption Capacity on page 4-48.
Regeneration
absorption
capacity
*1
20 W 40 W 70 W 140 W
Model
R88A-RR08050S
R88A-RR080100S
R88A-RR08050S
R88A-RR080100S
R88A-RR22047S1 R88A-RR22047S1
Resistance
*2
50 Ω/100 Ω 25 Ω/50 Ω 47 Ω 94 Ω
Connection
method
Regeneration
absorption
capacity
*1
140 W 280 W 560 W
Model R88A-RR22047S1 R88A-RR22047S1 R88A-RR22047S1
Resistance
*2
23.5 Ω 47 Ω 23.5 Ω
Connection
method
Regeneration
absorption
capacity
*1
180 W 360 W 1440 W
Model R88A-RR50020S R88A-RR50020S R88A-RR50020S
Resistance
*2
20 Ω 10 Ω 10 Ω
Connection
method
Surface temperatures on regeneration resistors can reach 200°C.
Do not place objects that tend to catch fire near the resistors. To prevent
people from touching them, install a type of cover that enables heat
dissipation.
R
R
R
R
R
R R
R
R R
R R
R R
R R
R R
R R
R R
R R
Precautions
for Correct Use
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