Omron R88D-GT series User Manual

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4-4 Regenerative Energy Absorption
4
System Design
Servo Drive Regenerative Energy Absorption Capacity
 Amount of Internal Regeneration Absorption in Servo Drives
The OMNUC G-Series Servo Drives absorb regenerative energy internally with built-in capacitors.
If the regenerative energy is too large to be processed internally, an overvoltage error occurs and
operation cannot continue. The following table shows the regenerative energy (and amount of
regeneration) that each Servo Drive can absorb.
If these values are exceeded, take the following measures.
• Connect an External Regeneration Resistor (to improve the regeneration processing capacity).
• Reduce the operating rotation speed. (The amount of regeneration is proportional to the square of
the rotation speed.)
• Lengthen the deceleration time (to decrease the regenerative energy produced per time unit).
• Lengthen the operation cycle, i.e., the cycle time (to decrease the average regeneration power).
Note These are the values at 100 VAC for 100-VAC models, and at 200 VAC for 200-VAC models.
Servo Drive
Regenerative
energy (J) that can
be absorbed by
internal capacitor
Internal regeneration resistance
Minimum value
of regeneration
resistance
(Ω)
Average amount of
regeneration that can
be absorbed (W)
Resis-
tance (Ω)
R88D-GTA5L 12 --- --- 18
R88D-GT01L 12 --- --- 18
R88D-GT02L 18 --- --- 18
R88D-GT04L 27 12 50 13
R88D-GT01H 16 --- --- 35
R88D-GT02H 16 --- --- 35
R88D-GT04H 25 --- --- 35
R88D-GT08H 43 12 100 27
R88D-GT10H 70 20 30 27
R88D-GT15H 70 20 30 18
R88D-GT20H 70 40 15 11
R88D-GT30H 70 40 15 11
R88D-GT50H 105 80 10 7
R88D-GT75H 250 --- --- 4

Omron R88D-GT series Specifications

General

Brand	Omron
Model	R88D-GT series
Category	Controller
Language	English