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4-4 Regenerative Energy Absorption
System Design
4
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.)
Extend the deceleration time (to decrease the regenerative energy produced per time unit).
Extend 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 model
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)
Resistance
(
Ω
)
R88D-GNA5L-ML2
12
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18
R88D-GN01L-ML2
12
---
---
18
R88D-GN02L-ML2
18
---
---
18
R88D-GN04L-ML2
27
12
50
13
R88D-GN01H-ML2
16
---
---
35
R88D-GN02H-ML2
16
---
---
35
R88D-GN04H-ML2
25
---
---
35
R88D-GN08H-ML2
43
12
100
27
R88D-GN10H-ML2
70
20
30
27
R88D-GN15H-ML2
70
20
30
18
R88D-GN20H-ML2
70
40
15
11
R88D-GN30H-ML2
70
40
15
11
R88D-GN50H-ML2
105
80
10
7
R88D-GN75H-ML2
250
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