YASKAWA Sigma II Series User Manual page 152

Sigma II User's Manual
Servo Amplifier Capacity of 500W or More
Servomotors with a capacity of 500W or more have built-in regenerative resistors.
The allowable frequencies for just the servomotor during acceleration/deceleration
operation, in the run cycle from 0 à maximum rotation speed à 0, are summarized
in the following table.
Convert the data into the values obtained with actual rotation speed used and load
inertia to determine whether an external regenerative resistor is needed.
Series
Capacity
Symbol
SGMAH
SGMPH
SGMGH-oAoA
SGMGH-oAoB
SGMSH
Operating Conditions for Allowable Regenerative Frequency Calculation
Servomotor rotation speed
Servomotor-generated torque
Use the following equation to calculate the allowable frequency for regeneration
mode operation.
Allowable frequency =
Allowable Frequencies in Regeneration Mode (times/min)
03 05 06 08
— — — 89
— — — 29
— 34 — —
96 — 39 —
— — — —
Load inertia = 0 (motor only)
Speed reference
0
0
0
T
(Operating cycle)
Allowable frequency for servomotor only
(1 + n)
Where: n = J /J
L M
: Servomotor rotary inertia [oz·in·s
J
M
: Motor axis conversion load inertia [oz·in·s
J
L
Chapter 5: Parameter Settings and Functions
09 10 12
— — —
— — —
13 — —
22 — 15
— 39 —
t
Maximum rotation speed
t
Regeneration mode
Maximum cycle
t
Maximum cycle
Allowable frequency = 1 Cycles
T Minute
(
×
5-85
13 15 20 30
— — — —
— — — —
10 — 12 8
— — 20 13
— 31 48 20
)
2
Max. rotation speed
Cycles
Rotation speed used
Minute
2 2
(kg·m )]
2 2
(kg·m )]