Fuji Electric Faldic-a Series, Руководство пользователя, Страница: 242 / 251

11-8 MHT258a (Engl.)
(ii) Load torque via conversion into motor shaft (T
L
)
( )
T
L
W BP
GL N m
=
×
× × =
× ×
×
× × =
( ) . . .
.
/ . [ ]
µ
η
9 81
2 10
0 1 20 9 81
2 0 9
10
10
1 1 0 03
3 3
π π
・
Where,
μ
: Friction coefficient = 0.1,
η
: Mechanical efficiency = 0.9
(iii) Shortest accel./decel. time (tac/tdc)
Of the motor which meets the following conditions ; J
L
≦
5
×
J
M
and T
L
≦
T
R
(rated torque )
×
0.9
0.2 [kW] motor is temporarily selected. :
Where,
T
L
= 0.03 [N
・
m], J
L
= 0.11
×
10
-3
[kg
・
m
2
], from motor data of 2.1 : rated torque = 0.637 [N
・
m], breakdown (max.) torque =
1.91 [N
・
m], moment of motor rotor inertia = 0.0216
×
10
-3
[kg
・
m
2
] for 0.2 [kW], GYC 201DC1-S motor.
a) Shortest accel./decel. time
t
AC
=
+ × ×
−
=
× + × × ×
−
=
− −
( )
( )
( . . )
( . . )
.
J J N
T T
M L
AC L
2
60
0 0216 10 0 11 10 2 3000
60 191 0 03
0 022
3 3
π π
[s]
b) Accel./decel. torque for application to soft operation (0.05 [s] accel. time) from 0 to 3000 [r/min] speed
T
AC
=
+ × ×
×
+ =
× + × × ×
×
+ =
− −
( ) ( . . )
.
. . [ ]
J J N
t
T N m
M L
ac
L
2
60
0 0216 10 0 11 10 2 3000
60 0 05
0 03 0 86
3 3
π π
・
Where,
J
M
: Moment of inertia of motor
N : Motor speed [r/min]
T
AC
: Max. torque which can be output within an increase from 0 to 3000 [r/min]
(iv) Operation pattern
0.86
0.03
0.86
0.05
0.05 0.05
50[mm]
500[mm/s]
(v) Moving length of ball-screw
Moving velocity (v) of mechanical equipment system at 3000 [r/min] motor speed (N)
V
= × × = × × =
N
BP GL
60
3000
60
10 1 1 500 ( / )
[mm/s]