3-31
j
100-VAC Input Type
Model
Absorptive regen-
eration energy (J)
Maximum applicable
load inertia
(x10
–4
kg
m
2
)
Remarks (see note *3)
R88D-UEP10L/UEP10W
(100 W)
13.3
1.2
Rotor inertia
×
30, 4,500 r/min
R88D-UEP12L/UEP12W
(200 W)
23.9
3.69
Rotor inertia
×
30, 3,000 r/min
R88D-UEP15L/UEP15W
(300 W)
99.5
3.8
Rotor inertia
×
20, 4,500 r/min
Note 1. The input voltage is the value at 100 VAC. As the input voltage is increased, the amount of
regenerative energy that can be absorbed is decreased.
Note 2. For Servomotors with brakes, add the brake inertia to the load inertia.
Note 3. This is the applicable range for the horizontal shaft. (No external force should be applied.)
Range for Absorbing Regenerative Energy
The relationship between rotational speed and the load inertia that can be absorbed by a Servo Driver
alone is shown in the diagrams below. If a Servo Driver is operated outside of this range, a Regeneration
Unit must be connected. These diagrams show the applicable range for the horizontal shaft. If an exter-
nal force acts in the same direction as the Servomotor rotation, due to factors such as the fall time on the
vertical shaft, be sure to measure the regenerative energy and check to see that the amount that can be
absorbed is not exceeded.
j
R88D-UEP04H/UEP04V (100 W)
R88D-UEP10L/UEP10W (100 W)
Applicable load inertia
(
×
10
–4
kg
m
2
)
100W 1.2
×
10
–4
kg
m
2
Rotational speed (r/min)
Operation
Chapter 3
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