
3.SPECIFICATIONS AND
CHARACTERISTICS
B–65142E/04
FANUC AC SERVO MOTOR α (HV) series
226
The intermittent operation zone is determined by the input voltage
applied to the drive amplifier. The curve shown is the value for the rated
input voltage (400V).
On models α3HV to α6HV, 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
The overload duty characteristic curves are determined based on the
temperature restriction for the single motor unit (the temperature is
restricted by means of a thermal trip built into the motor). The curves are
determined by assuming that the temperature increases gradually under
certain overload conditions. Therefore, the curves do not apply to the
rapid temperature rise which occurs, for example, when the motor shaft
is locked. (An overcurrent flows in the motor windings until the thermal
trip operates. The temperature rises momentarily.)
To detect such an abrupt temperature rise, the FANUC digital servo
system provides a software thermal function that uses servo software to
observe the current. During operation that is characterized by frequent
acceleration/deceleration cycles, control is imposed by the software
thermal function.
Driving units (such as amplifiers) and built–in detectors contain their own
overheating protection devices. Therefore, note that control may be
imposed according to how the equipment is being used.
The parameters given in the data sheet are representative values for an
ambient temperature of 20°C. They are subject to an error of +10%.
The indicated logical values are threshold values for the single motor unit
(when the motor is not restricted by the control system).
The maximum torque that can be produced during acceleration or
deceleration in actual use is calculated as the approximate product of the
motor torque constant and the current limit value of the amplifier.
Example : α3/3000HV
D Motor torque constant = 1.06 (Nm/Arms)
D Amplifier limit value = 20 Apeak
D Maximum torque value
= 20
0.707 1.06
(Converted to an effective value)
= 14.9 Nm
3.2
CHARACTERISTIC
CURVE AND DATA
SHEET
Speed–torque
characteristics
Overload duty
characteristic
Data sheet