USER MNL/DIGITAL AC SERVO DR Manual

9
Chapter
9-1
1326 AC Servomotors
Chapter Objectives Chapter 9 describes the operation of a standard 1326 AC Servomotor with
the enhanced capabilities of a Bulletin 1391-DES Digital AC Servo Drive.
Refer to the 1326 AC Servomotor Product Data for further information on
Allen-Bradley AC Servomotors.
Introduction The 1391-DES provides additional energy to the 1326 motor, allowing it to
operate at higher speeds without a reduction of torque.
In general, the 1326 motor will follow the speed–torque curve shown in
Figure 9.1
Figure 9.1
Typical Bulletin 1326 Speed–Torque Curve
0
20
40
60
80
100
120
0 40 80 120 160 200 240 280
Speed
(% rated rpm)
Torque (% rated)
75%
70%
70%
(Tc) (Tp)
Intermittent OperationRated Operation
Peak Torque with
Nominal Input
Line Voltage
1391-DES Peak Torque
with Nominal 15% Low
Input Line Voltage
1391-DES Rated Speed
1391-DES Rated Operation 1391-DES Intermittent Operation
xx
100 300
1391B Rated Speed
Standard Peak Torque
with Nominal 15% Low
Input Line Voltage