11
Table 2-1 SER series servo motor rotor inertia and retrogradation capacity absorbed
Model
Motor
rotor inertia
4
2
( 10
)
J
kg m
Retrogradation
from rated speed
to motionless
without load
Eo (J)
Capacity
maximum
retrogradatio
n
Ec (j)
EA100-2R8-2
□
SER06-0R4-30-2
□
AY
0.3
1.48
16
EA100-5R5-2
□
SER08-0R7-30-2
□
AY
1.01
4.99
24
EA100-7R6-2
□
SER13-1R0-10-2
□
BY
17.14
9.42
41
EA100-7R6-2
□
SER13-1R0-20-2
□
BY
8.71
19.1
41
EA100-010-2
□
SER13-1R5-20-2
□
BY
12.08
26.5
41
EA100-5R4-3
□
SER13-1R5-20-3
□
BY
12.08
26.5
34
EA100-8R4-3
□
SER13-2R0-20-3
□
BY
17.14
37.67
49.6
EA100-012-3
□
SER13-3R0-20-3
□
BY
25.58
56.22
49.6
EA100-018-3B SER13-4R5-15-3BBZ
35.37
43.73
61.2
EA100-021-3B SER13-5R6-15-3BBZ
45.51
56.26
91.8
EA100-026-3B SER13-7R5-15-3BBZ
79.89
98.76
91.8
retrogradation energy calculation formula:
v
：
rpm
，
motor maximum speed
The motor rotor inertia of servo motor with brake is same with servo motor without
brake’s.
2.7.1 Built-in brake resistance
There is brake resistance in EA100 series drive, suitable for the general situation of the load inertia. About EA100 series built-in brake
resistance specifications, please refer to Table 2-2.
Table2-2 EA100 drive built-in brake resistance allowable minimum external brake resistance
Model
Brake resistance(built in)
Retrogradation
treated by built in
brake resistance
Allowable
minimum
external brake
resistance
Resistor(P8-18) Capacity(P8-19)
EA100-2R8-2
□
50
Ω
100W
50W
50
Ω
EA100-5R5-2
□
50
Ω
100W
50W
50
Ω
EA100-7R6-2
□
50
Ω
100W
50W
40
Ω
EA100-010-2
□
50
Ω
100W
50W
40
Ω
EA100-5R4-3
□
50
Ω
100W
50W
50
Ω
EA100-8R4-3
□
50
Ω
100W
50W
50
Ω
EA100-012-3
□
50
Ω
100W
50W
45
Ω
EA100-018-3B
40
Ω
200W
90W
30
Ω
EA100-021-3B
40
Ω
200W
90W
30
Ω
EA100-026-3B
40
Ω
200W
90W
25
Ω
2.7.2 External brake resistance capacity calculation
When the retrogradation capacity exceeded retrogradation capacity internal brake
resistance can dealt with, should use external braking resistance.
According to the calculation formula of retrogradation , assuming the load inertia is N times the inertia of the rotor of the motor, motor
from the rated speed to 0, retrogradation is (N+1) *Eo, the action cycle is T, then
Power of braking resistance
2.7.3 Note when using external braking resistance
When using external braking resistor, resistor connected to the P+ and C terminal, at the same time must remove the short circuit piece
installing between P+ and D, makes P and D two terminals in the open state.
The external braking resistance cannot be less than reported in table 2-2, otherwise it might damage the drive.
Please make the external resistor braking resistor value and the capacity set to the function parameters of drive correctly, otherwise it will
affect the execution of the function.
P8-18 (brake resistance), P8-19 (brake resistance capacity).
In the natural environment, when the braking resistor can handle retrogradation capacity (average) below the rated capacity, resistance
temperature will rise to 120
℃
above(in the continuous braking condition). For security, please use the forced cooling system, to reduce
the temperature of the brake resistor; or recommend the use of braking resistor with thermo switch. The load characteristics on braking
resistance, please refer to the manufacturer.
Note
：
1) Please make the external braking resistor same with the internal braking resistor, otherwise,
may lead to drive damaged.
)
(
182
/
2
0
J
J
v
E
T
N
E
E
C
)
)
1
((
2
0