Product Description:

The R2AA08040FXP29 servo motor is manufactured by Sanyo Denki and belongs to the R SANMOTION Servo Motors series. It is a medium-inertia unit intended for industrial automation applications that require consistent acceleration and rapid deceleration. An 80 mm flange simplifies attachment to gearboxes or direct-drive fixtures. Its battery-backed absolute encoder retains multi-turn position data over 65,536 revolutions even when control power is removed, supporting coordinated restarts in packaging, assembly, and inspection equipment.

During continuous operation, the motor delivers 400 W of mechanical output at a rated shaft speed of 3000 rpm. At that operating point, it produces a continuous torque of 1.27 N·m from a phase current of 2.6 A RMS. The stator is wound for a 200 V supply, allowing the motor to operate with compatible 200 VAC servo drives without a step-down transformer. The housing must dissipate the resulting thermal load, while the drive stage must provide the required steady-state power. With a phase resistance of 0.93 Ω and a torque constant of 0.559 N·m/A RMS, the motor converts current into torque while controlling copper losses. A continuous stall torque of 1.37 N·m provides additional capacity for low-speed holding and indexing tasks.

An electrical time constant of 2.5 ms allows a fast current rise, supporting quick torque corrections commanded through the encoder resolution of 131,072 counts per revolution. For intermittent peaks, the rotor can accelerate to 6000 rpm, doubling the rated speed for momentary reductions in cycle time. It can also withstand sudden load surges up to a peak stall torque of 4.4 N·m. The encoder’s multi-turn range supports position tracking across repeated shaft rotations without requiring a new reference cycle after a normal power interruption. Because the motor does not include an internal holding brake, external clamping or another suitable holding method is required when a stationary load must remain secured without motor torque.