Product Description:

The R2AA13120LCP40 is a medium-inertia AC servo motor produced by Sanyo Denki within the R SANMOTION Servo Motors series. Intended for positioning axes and speed-regulated drives in factory automation, the model mounts directly to gearboxes or load frames through its 130 mm square flange. Its integrated battery-backed absolute encoder retains position data when the main power is disconnected, eliminating the need to repeat the homing process after routine shutdowns. A holding brake locks the shaft during power-off conditions, allowing vertical loads to remain stationary without external clamps.

During continuous operation, the motor delivers a rated output of 1.2 kW while producing 5.7 N·m of torque at 2,000 rpm. At this operating point, the windings draw 7.6 A RMS from a three-phase 200 V bus. Electrical characteristics that affect drive sizing include a torque constant of 0.582 N·m per ampere and a phase resistance of 0.69 Ω, which influence current demand and copper losses. The voltage constant is 20.3 mV per rpm, indicating the back electromotive force presented to the inverter as shaft speed increases. A rotor inertia of 2.003 × 10⁻⁴ kg·m² provides a balance between responsive acceleration and stable operation with connected loads.

During startup or rapid transients, the drive can command up to 20.0 N·m of peak stall torque, providing additional force to overcome static friction and process disturbances. When held motionless under servo control, the allowable continuous stall torque is 6.0 N·m, which accounts for the motor’s thermal capacity at zero speed. The integrated holding brake provides 9.0 N·m of static torque and operates from a 24 VDC coil connected to the machine’s control supply. Position feedback offers a resolution of 131,072 counts (17-bit), allowing the controller to detect small changes in shaft angle without external interpolation. The retained absolute position also supports controlled restarts after power interruptions while preserving the axis reference.