Product Description:

The KB511XXX is a compact brushless DC servo motor produced by Sanyo Denki for the K SANMOTION Servo Motors series. Designed for closed-loop positioning and velocity regulation, this model converts drive commands into precise mechanical motion for index tables, small conveyors, and electronic assembly stations. Its compact housing and low-voltage windings make it compatible with distributed axes that share a low-voltage bus in modern automation cells.

The motor mounts through a 54 mm square flange, allowing direct coupling to miniature gearboxes and linear stages. Copper losses are limited by an armature resistance of 0.44 Ω, while the windings have an inductance of 0.3 mH; these parameters affect the current response and ripple produced by the drive. At the rated 24 V supply, the windings draw 5.0 A to reach a speed of 3000 rpm. At that operating point, a continuous torque of 0.26 N·m produces a shaft output of 80 W. A power rate of 1.8 kW/s and a mechanical time constant of 4.5 ms indicate that the rotor can accelerate quickly when the load changes. The torque constant is 0.06 N·m/A, and the back-EMF constant is 6.3 × 10⁻³ V/rpm, providing consistent relationships among command current, developed torque, and generated voltage.

Dynamic performance during transients is supported by a continuous stall torque of 0.32 N·m and a peak stall torque of 2.16 N·m. The peak value permits brief overloads during rapid indexing, while the continuous value indicates the torque available at standstill without exceeding the motor’s thermal limit. A rotor inertia of 0.37 × 10⁻⁴ kg·m² works with the power rate to reduce settling time, making the motor suitable for pick-and-place heads that reverse direction frequently. The combination of low inertia and short response time also reduces the effort required from the drive during repeated acceleration and deceleration. These operating characteristics support controlled motion when the connected axis encounters changing loads or external disturbances.