KA720JXX Sanyo Denki
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The Sanyo Denki KA720JXX is part of the K SANMOTION Servo Motors series and features a flange size of 76 millimeters square with a mass of 2.80 kilograms. It delivers a rated output of 200 watts, a rated speed of 3000 min-1, and a rated torque of 0.64 Newton-meters. The armature resistance is 2.2 Ohms, and the peak stall torque reaches 5.4 Newton-meters.
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Product Description:
The KA720JXX is a servo motor manufactured by Sanyo Denki for the K SANMOTION Servo Motors series. As a permanent-magnet DC unit, it provides precise shaft positioning and velocity control for pick-and-place heads, indexing tables, and similar automation axes on factory floors. Its electromechanical design converts armature voltage into rotary motion, while an integrated tachogenerator sends real-time speed data to the drive. This feedback allows closed-loop regulation in multi-axis machinery without requiring a separate speed sensor.
The motor delivers a rated shaft output of 200 W when supplied with a nominal armature voltage of 80 V and a continuous current of 3.4 A. Steady load performance includes a continuous stall torque of 0.77 N·m, while an armature resistance of 2.2 Ω influences copper losses and the rate at which current rises during acceleration. At its rated speed of 3000 rpm, the shaft produces 0.64 N·m of torque, which is suitable for many medium-inertia transmission stages. The built-in tachogenerator produces 7×10⁻³ V/rpm with a tolerance of ±10%, giving the controller a proportional signal for speed correction.
A 76 mm square flange provides the motor’s mechanical mounting interface and connects directly to compact gearboxes. The motor has an overall mass of 2.80 kg, making it suitable for installation on moving gantries. A braking module applies 820 Ω of resistance and accepts 90 V with a tolerance of ±10%, allowing the shaft to stop quickly when braking is required. Static load retention is supported by a holding torque of 1.47 N·m, while short-term overloads can reach a peak stall torque of 5.4 N·m during rapid indexing moves. Motion responsiveness is supported by a rotor inertia of 1.47×10⁻⁴ kg·m², which permits fast starts while helping smooth speed ripple during constant-velocity operation.
