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S S SGMAH Servomotor, 100 V
200
180
160
140
120
Loss
(W)
100
80
60
40
20
0
0
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Note 1.
The "0.2" in the equation for calculating W
resistor's utilized load ratio is 20%.
2. The units for the various symbols are as follows:
: Energy joules (J)
E
to E
S
K
W
:Regenerative resistor required capacity (W) t
K
2
)(kg·m
J:(= J
+ J
M
L
N
: Rotation speed used by Servomotor (r/min)
M
If the above calculation determines that the amount of regenerative power (Wk) that can be pro-
cessed by the built-in resistor is not exceeded, then an external regenerative resistor is not re-
quired.
If the amount of regenerative power that can be processed by the built-in resistor is exceeded,
theninstall anexternal regenerative resistorforthe capacityobtainedfromthe abovecalculation.
If the energy consumed by load system loss (in step 2 above) is unknown, then perform the cal-
culation using E
= 0.
L
When the operation period in regeneration mode is continuous, add the following items to the
above calculation procedure in order to find the required capacity (W) for the regenerative resis-
tor.
D Energy for continuous regeneration mode operation period: E
D Energy consumed by regenerative resistor: E
D Required capacity of regenerative resistor: W
Here, E
= (2
/60) N
p
G
MG
D T
: Servomotor'sgeneratedtorque (N·m)(oz·in)incontinuousregenerationmodeoperation
G
period
D N
:Servomotor rotation speed (r/min) for same operation period as above
MG
D t
:Same operation period (s) as above
G
Servomotor Winding Resistance Loss
The following diagrams show the relationship, for each Servomotor, between the Servomotor's
generated torque and the winding resistance loss.
1. Servomotor for 100 V
SGMAH-
01B
02B
A5B
A3B
100
200
Torque (%)
is the value for when the regenerative
K
:Load torque (N·m) (oz·in)
T
L
: Deceleration stopping time (s)
D
2
) (oz·in·s
)
T: Servomotor repeat operation period (s)
= E
K
= E
K
T
t
G
G
S S SGMPH Servomotor, 100 V
160
140
120
100
Loss
(W)
80
60
40
20
0
0
300
5 -87
5.6 Selecting a Regenerative Resistor
(joules)
G
- - (E
+ E
+ E
) + E
S
L
M
C
G
/ (0.2 ¢ T)
K
SGMPH-
02B
01B
100
200
Torque (%)
5
300
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