KA720BXX Sanyo Denki
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The Sanyo Denki KA720BXX is part of the K SANMOTION Servo Motors series and offers a rated output of 0.2 kW with a rated speed of 3000 RPM. It features a 76 mm square flange, a holding brake, and a continuous stall torque of 0.77 Newton-meters. The servo motor has a rated armature current of 3.4 Amps and a motor mass of 2.39 kilograms.
Internal Product Review
The KA720BXX is a Sanyo Denki K SANMOTION servo motor with 0.2 kW rated output and 3000 min⁻¹ rated speed. A favorable torque profile comes from 0.64 N·m rated torque and 5.4 N·m peak stall torque, supporting responsive positioning under changing load. The holding brake adds secure axis retention, while 0.77 N·m continuous stall torque stands out for dependable servo holding performance.
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Product Description:
The KA720BXX is a brushless AC servo motor manufactured by Sanyo Denki and supplied under the K SANMOTION Servo Motors series. As a compact rotary actuator, it converts electrical energy into precisely regulated mechanical torque and speed for automated equipment. When paired with a compatible servo amplifier, the motor provides the feedback needed to position gantries, indexing tables, and electronic assembly stages. Its compact design supports repeatable motion profiles in machines where installation space is limited.
The motor has a rated armature voltage of 80 V. At that voltage, the windings draw 3.4 A to produce a continuous mechanical output of 0.2 kW while the shaft rotates at 3000 rpm. Under these conditions, the motor supplies 0.77 N·m of stall torque without overheating. A winding resistance of 2.2 Ω limits copper loss, while an inductance of 3.3 mH shapes the current response for smooth commutation. The integrated holding brake secures the load whenever power is removed, making the motor suitable for vertical axes and applications that require load retention. A rated torque of 0.64 N·m is available for steady-state motion. The square 76 mm flange provides a standard mounting interface for attachment to a machine frame or gearbox. Power and feedback conductors exit through 1000 mm lead wires, allowing the cables to be routed toward the control cabinet.
The motor delivers a peak stall torque of 5.4 N·m, allowing the drive to overcome inertial or frictional surges during acceleration. This performance is balanced by a rotor inertia of 1.47 × 10⁻⁴ kg·m², which permits fast speed changes without requiring excessive controller gain. With a torque constant of 0.23 N·m/A, each additional ampere commanded by the amplifier produces a predictable increase in shaft torque. This linear relationship helps the controller regulate acceleration and maintain stable motion under changing loads. The complete assembly weighs 2.39 kg, so it adds relatively little mass to moving carriages while accommodating the integrated brake and bearing set. The moderate weight also reduces the structural load placed on compact positioning mechanisms.
