Product Description:

The KA720XXX is a brushless AC servo motor produced by Sanyo Denki for the K SANMOTION Servo Motors series. This motor serves as a compact drive element in automated assembly lines that require closed-loop control of position, velocity, and acceleration. Permanent-magnet excitation and low rotor inertia allow the motor to follow motion profiles commanded by a digital drive accurately. These operating characteristics make it suitable for pick-and-place heads, light conveyors, indexing fixtures, and other general industrial automation equipment.

At a rated armature voltage of 80 V, the drive supplies a rated current of 3.4 A and produces a continuous shaft torque of 0.64 N·m. Under these rated conditions, the rotor operates at 3000 rpm and provides a mechanical output of 200 W. The square 76 mm flange simplifies alignment with compatible gearboxes, while the motor’s mass of 1.80 kg helps limit the weight of moving assemblies. A power rate of 2.8 kW/s indicates how quickly the motor can change its mechanical output during rapid indexing. The armature resistance is 2.2 Ω, and the voltage constant is 24.2 × 10⁻³ V per rpm. These electrical values affect the back electromotive force that the servo amplifier must overcome as speed increases.

A peak stall torque of 5.4 N·m is available for short bursts, supporting rapid load positioning before the motor reaches its thermal limits. The continuous stall torque remains at 0.77 N·m when airflow is restricted, providing a basis for evaluating sustained operation at zero speed. The armature inductance is 3.3 mH, which allows the servo amplifier to tune its current loops for responsiveness and stability. Mechanical response is supported by a rotor inertia of 1.47 × 10⁻⁴ kg·m², allowing high acceleration without excessive drive effort. The combination of short-term torque capacity, continuous stall capability, moderate inductance, and low inertia supports controlled starts, stops, and direction changes in repetitive motion applications.