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12.8 Regenerative Resistor
12.8.6 Selecting External Regenerative Resistor
12-38
SERVOPACK Model: SGD7S-3R8A, -5R5A, -7R6A, -120A, -180A,
-200A,-330A, -470A, -550A, -590A, or
-780A
SGD7W-1R6A, -2R8A, -5R5A, or -7R6A
SGD7C-1R6A, -2R8A, -5R5A, or -7R6A
The above SERVOPACKs require regenerative resistors. Regenerative resistors are built into all
of the SERVOPACKs in advance except for the SGD7S-470A, -550A, -590A, and -780A. If you
use the SGD7S-470A, -550A, -590A, or -780A, always provide an external regenerative resis-
tor. Refer to the following section for details.
The allowable frequencies for regenerative operation of the Servomotor without a load in accel-
eration/deceleration operation during an operation cycle from 0 (min
-1
) to the maximum motor
speed and back to 0, are listed below. For the SGD7S-470A, -550A, -590A, and -780A, the
allowable frequencies are given for when a Regenerative Resistor Unit is connected. Refer to
the following section for details on Regenerative Resistor Units.
Convert the data into the values for the actual motor speed and load moment of inertia to
determine whether an External Regenerative Resistor is required.
Rotary Servomotors
Servomotor Model
Allowable Frequencies in
Regenerative Operation
(Rotations/Min)
Servomotor Model
Allowable Frequencies in
Regenerative Operation
(Rotations/Min)
SERVOPACK
Model:
SGD7S
SERVOPACK
Model:
SGD7W or
SGD7C
(Simultane-
ous Opera-
tion of Two
Axes)
SERVOPACK
Model:
SGD7S
SERVOPACK
Model:
SGD7W or
SGD7C
(Simultane-
ous Opera-
tion of Two
Axes)
SGM7M-
A1A
−
−
SGM7P-
01A
−
200
A2A
−
−
02A
−
46
A3A
−
−
04A
−
29
SGM7J-
A5A
−
300
08A
11
11
01A
−
180
15A
7.5
−
C2A
−
130
SGM7G-
03A
39
39
02A
−
46
05A
29
29
04A
−
25
09A
6.9
6.9
06A
30
30
13A
6.1
−
08A
15
15
20A
7.4
−
SGM7A-
A5A
−
560
30A
9.5
−
01A
−
360
44A
6.4
−
C2A
−
260
55A
24
−
02A
−
87
75A
34
−
04A
−
56
1AA
39
−
06A
77
77
1EA
31
−
08A
31
31
SGMMV-
A1A
−
−
10A
31
−
A2A
−
−
15A
15
−
A3A
−
−
20A
19
−
25A
15
−
30A
6.9
−
40A
11
−
50A
8.8
−
70A
86
−