
B–65142E/04
3. SPECIFICATIONS AND
CHARACTERISTICS
FANUC AC SERVO MOTOR αM series
157
Specification : A06B–0377–Bjjj
Speed – torque characteristics
Speed (min
–1
) ”ON” time (min.)
Over load duty
Torque
(Nm)
Duty
(time %)
Intermittent operating
Continuous operating
Data sheet
Parameter Symbol Value Unit
Rating rotation speed Nmax 3000 min
-1
Rated torque at stall (*) Ts
2.5
26
Nm
kgfcm
Rotor inertia Jm
0.00052
0.0053
kgm
2
kgfcms
2
Continuous RMS current at stall
(*)
Is 3.7 A (rms)
Torque constant (*) Kt
0.67
6.8
Nm/A (rms)
kgfcm/A (rms)
Back EMF constant (1–phase)
(*)
(*)
Ke
Kv
23
0.22
V (rms)/1000min
-1
V (rms)·sec/rad
Armature resistance (1–phase)
(*)
Ra 0.59 Ω
Mechanical time constant (*) tm 0.002 s
Thermal time constant tt 20 min
Static friction Tf
0.2
2
Nm
kgfcm
Mass 4.3 kg
(*)The values are the standard values at 20°C and the tolerance is "10%.
The speed–torque characteristics very depending on the type of software, parameter
setting, and input voltage of the digital servo motor. (The above figures show average
values.) These values may be changed without prior notice.
On model αM2.5, the maximum speed of rotation is increased by using HRV control.
The speed-torque characteristics for when HRV control is used are described at the
end of this item
Model αM2.5/3000