Product Description:

The KB402XS0 is a brushless servo motor built by Sanyo Denki within the K SANMOTION Servo Motors series. Its miniature square-frame construction lets it integrate into pick-and-place heads, index tables, and small actuators that demand precise positioning. In industrial automation, the motor receives commanded current from a servo amplifier, converts it into proportional torque, and feeds back the rotor angle so the controller can close the position loop with millisecond accuracy. Its electrical design targets low-voltage control systems used in semiconductor tools and compact conveyance modules.

At the rated operating point, a supply of 20 V is applied to the stator windings. Under this condition, a phase current of 1.8 A is required, and the motor outputs 23 W of mechanical power. The continuous operating point delivers 0.074 N·m of shaft torque while maintaining a speed of 3000 rpm. With a torque constant of 0.047 N·m/A, the drive can estimate the load through current monitoring. The low rotor inertia of 0.047 × 10⁻⁴ kg·m² minimizes overshoot during rapid reversals. Copper loss stays limited at this power level, supporting continuous duty in confined enclosures.

During acceleration, the shaft can reach a peak stall torque of 0.42 N·m, providing more than five times the continuous torque for short bursts. The drive can command velocities up to 5000 rpm when process cycles require higher throughput. The winding resistance is 3.2 Ω, keeping voltage drop low and preserving servo bandwidth. Mechanical integration is simplified by the square 42 mm flange and a mass of 0.40 kg, which reduces the load on miniature slides. Position feedback is provided by a 2000 P/R incremental encoder powered from a +5 VDC ±5% rail, and its differential line-driver outputs maintain signal integrity. A continuous stall rating of 0.08 N·m supplies thermal margin for static holding applications without a separate brake.