AC Servo Motor 5000 RPM Series C Allen-Bradley 1326AB-B410G-21

The Allen-Bradley 1326AB-B410G-21 is a three-phase, brushless AC synchronous permanent magnet servo motor from the Bulletin 1326 Torque Plus Series, built for use with the Allen-Bradley 1394 Motion Control System. Torque Plus motors use a specially engineered housing that reduces motor length and increases continuous torque ratings, with special flux profile permanent magnets, a three-phase sinusoidal-wound stator field for smooth low-speed operation, TENV construction, an extruded aluminum housing for improved heat transfer, and 100 percent continuous-rated output torque at stall. Unlike an induction motor, which produces torque through rotor slip and requires no position feedback, this unit relies on rotor position feedback to electronically commutate the stator windings, giving full rated torque at zero speed and precise position control. This unit carries a resolver, the standard feedback option, which is a rugged brushless device that provides accurate position feedback, eliminates the need for on-board electronics, and withstands harsh shock, high operating temperatures, and vibration, generating a 2048 ppr A quad B encoder output. A normally closed thermal switch in the motor winding rated 115V AC / 24V DC at 1A provides thermal overload indication. Typical applications include CNC machine tools, packaging machinery, indexing tables, and general high-performance motion control axes.

Model number decode: 1326 is the bulletin number. AB designates a ferrite AC servo motor, B designates 460/380V AC, 4 designates a 108 mm frame diameter on a 115 mm bolt center, 10 is the sequential magnet stack length within that frame size, G is the letter designation for rated motor speed, and 21 designates an IEC metric flange with keyway. No trailing suffix is present, which means resolver-based feedback, standard IP65 environmental rating, and no integral holding brake. The nameplate confirms this with BRAKE: NO. Nameplate values match the published catalog data for the B410G winding: 1 kW continuous output, 2.72 N-m (24 lb-in) continuous stall torque, 2.44 A continuous RMS current, and 5000 rpm maximum speed at 40 C.