KA840TS0 Sanyo Denki
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The Sanyo Denki KA840TS0 is a servo motor in the K SANMOTION Servo Motors series with a rated output of 400 W and a rated speed of 2500 min^-1. It features a flange size of 88 mm square, a rated torque of 1.53 Newton-meters, and weighs 4.10 kilograms. The motor is equipped with a line driver encoder with a resolution of 2000 pulses per revolution.
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Product Description:
The KA840TS0 is a brushless servo motor produced by Sanyo Denki for the K SANMOTION Servo Motors series. Designed for position and velocity control on pick-and-place axes, feeders, and compact gantries, the unit converts electrical power into controlled mechanical rotation for automated machinery. Integrated encoder feedback and a square 88 mm flange allow it to fit medium-power motion modules where repeatable torque and fast acceleration are required.
With a rated current of 5.7 A and a rated voltage of 85 V, the motor delivers a continuous shaft output of 400 W. This output is achieved at a nominal speed of 2500 rpm, where electromagnetic forces generate a steady mechanical torque of 1.53 N·m. These operating values help drive controllers set suitable current limits and power requirements. The 0.31 N·m/A torque constant indicates the proportional relationship between phase current and torque production, while the 32.9 × 10⁻3 V/rpm voltage constant indicates the back electromotive force that the drive must overcome as speed rises. A square 88 mm flange with four 6.6 mm mounting holes centers the motor on gearboxes or machine plates and provides thermal contact for continuous operation. The enclosure has a mass of 4.10 kg, keeping the load applied to the machine frame moderate.
The magnetic circuit has an inductance of 1.5 mH and a resistance of 0.95 Ω, which influence current ripple and copper losses during high-frequency pulse-width modulation. Position feedback comes from a line-driver encoder with a resolution of 2000 pulses per revolution, allowing fine incremental positioning while maintaining noise immunity over long cables. The rotor has a moment of inertia of 5.0 × 10⁻4 kg·m², enabling quick acceleration when it is coupled to low-mass loads. The motor can therefore respond rapidly to changing position commands without imposing excessive inertial demand on the connected drive. Its electrical constants also provide the values needed to tune current and velocity loops for indexing equipment. The mounting pattern supports secure attachment while maintaining alignment between the motor shaft and the connected mechanical assembly.
