R2AA18550HXPKUM Sanyo Denki
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The Sanyo Denki R2AA18550HXPKUM is a middle inertia servo motor from the R SANMOTION Servo Motors series. It provides a rated output of 5.5 kW, a rated speed of 1500 min-1, and a rated torque of 35.0 N·m. The motor features a 180 mm flange, 200 Volt supply voltage, and a battery backup absolute encoder with 131072 counts per revolution.
Internal Product Review
The R2AA18550HXPKUM is a Sanyo Denki SANMOTION R series servo motor with 5.5 kW rated output and 35.0 N·m rated torque. Middle-inertia construction and a battery backup absolute encoder support stable dynamic response and dependable position retention in demanding motion systems. High feedback fidelity from 131072 counts/rev and 107.0 N·m peak torque make the motor a strong choice for precise, high-load servo applications.
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Product Description:
The R2AA18550HXPKUM is an AC servo motor produced by Sanyo Denki within the R SANMOTION Servo Motors series. Classified as a medium-inertia unit, it is intended for positioning and speed control in automated machinery where moderate load matching and high cycle accuracy are required. When connected to a compatible servo drive, the motor converts regulated electrical power into controlled mechanical output. It supplies rotary motion for material-handling arms, gantry tables, packaging spindles, and similar automated axes. Its CE and UL approvals support installation in European and North American industrial systems, subject to the applicable installation requirements.
At its continuous operating point, the motor delivers 5.5 kW of shaft power while rotating at a nominal speed of 1500 rpm. This operating point corresponds to a continuous torque of 35.0 N·m, produced with a phase current of 46.2 Arms from a 200 V supply. The low phase resistance of 0.03 Ω limits resistive losses and helps maintain efficient power transfer during continuous operation. Because a holding brake is not installed, static load retention must be provided by external mechanics or drive-applied torque. The battery-backed absolute encoder maintains position data through power cycles. Its multi-turn capacity of 65,536 revolutions allows the controller to retain the axis position without performing a homing cycle after startup.
Dynamic operation is supported by a peak torque capability of 107.0 N·m, while short-term stall torque reaches 37.5 N·m for rapid indexing. The motor has a 180 mm flange and a rotor inertia of 68 × 10-4 kg·m², providing a balance between acceleration response and load stability. The feedback device offers a single-turn resolution of 131,072 counts per revolution and records complete revolutions through its multi-turn function. This resolution supports precise position measurement across long travel distances and repeated motion cycles. With a torque constant of 0.84 N·m/Arms, the drive can calculate expected output torque from the commanded current. This relationship supports accurate current regulation and closed-loop torque control in coordinated multi-axis machinery.
