P80B18120HXM20 Sanyo Denki
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The Sanyo Denki P80B18120HXM20 is a brushless servo motor in the P8 Super BL Servo Motors series, featuring a 180 mm flange size and a shaft diameter of 28 mm. It has a rated output of 1.2 kW, a rated speed of 2000 min-1, and a rated torque of 5.6 N·m. The motor comes with an encoder resolution of 8,192 divisions and does not have a holding brake.
Internal Product Review
The P80B18120HXM20 is a Sanyo Denki brushless servo motor delivering 1.2 kW rated output and 5.6 N·m rated torque. Precise motion performance is supported by 8,192-division encoder resolution and a 3000 min-1 maximum speed. A very capable choice for servo axes that demand accurate feedback and solid dynamic response.
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Product Description:
The P80B18120HXM20 is a brushless AC servo motor built by Sanyo Denki for the P8 Super BL Servo Motors series. It converts commanded current into rapid, repeatable shaft movement, making it suitable for medium-power feed drives, pick-and-place axes, and packaging lines. Position feedback is provided by an internal incremental encoder with 8,192 divisions per revolution, giving the controller the positional granularity required for coordinated multi-axis motion. The feedback signal allows the connected servo controller to monitor rotor movement and correct position or speed errors during operation.
Under continuous duty, the motor provides a rated output of 1.2 kW at a shaft speed of 2,000 rpm, producing a rated torque of 5.6 N·m. These operating values are achieved with a phase current of 10.4 Arms, and the torque constant is approximately 0.73 N·m/Arms. An electrical time constant of 18 ms indicates the rate at which phase current responds to a voltage change, while a phase resistance of 0.22 Ω affects copper loss and current-loop behavior. The mechanical time constant is 1.5 ms, supporting quick rotor acceleration when the drive issues a new speed or position command. Heat is dissipated through convection, and the motor has an overall length of 119 mm for installation in compact machine spaces. The motor does not have a holding brake, so static loads must be secured by drive-applied torque or an external locking device when the axis is stationary.
For short periods of increased demand, the motor can produce a peak stall torque of 14.0 N·m or reach a no-load speed of 3,000 rpm before the controller limits power. The square mounting flange measures 180 mm, providing a rigid interface for attachment to a machine frame, gearbox, or mounting plate. Torque is transferred through a keyed output shaft with a diameter of 28 mm, allowing positive engagement with compatible couplings and driven equipment. The rotating assembly has an inertia of 1.21 × 10⁻³ kg·m², which supports rapid indexing while limiting the regenerative energy produced during deceleration. Its combination of encoder feedback, fast mechanical response, and short-term torque capacity supports frequent start-and-stop motion in automated machinery.
