C3.SM.000-6400 KEB
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The KEB C3.SM.000-6400 is part of the SM Synchronous Servo Motors series and has a rated stall torque of 5.65 Nm with a stall current of 5.4 Amps. This servo motor has a maximum speed of 9000 rpm and a peak torque of 29.25 Nm, with a mass of 4.9 kg. It features 4 pole pairs, a voltage constant of 103.24 Vpk per 1000 rpm, and a rotor inertia of 2.87 kgcm2.
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Product Description:
KEB manufactures the C3.SM.000-6400, a brushless servo motor in the SM Synchronous Servo Motors series. This permanent-magnet unit is intended for closed-loop drives where rapid speed changes and precise torque control are required, such as pick-and-place axes or compact conveyor stations. Integrated feedback helps the motor synchronize accurately with its drive controller, supporting repeatable motion profiles in industrial automation cells. Its compact servo design is suited to applications that need quick reversals, stable speed regulation, and accurate positioning during short cycle times.
At continuous operating load, the stator windings draw 4.75 A. This rated current marks the thermal operating point at which the motor can run continuously without exceeding insulation limits. The mechanical section can accelerate up to 9000 rpm, so the connected load and coupling must be suitable for that shaft speed. When the shaft is locked, the motor develops 5.65 Nm of stall torque, and it draws about 5.4 A in that condition. The back EMF slope is 103.24 Vpk/1000 rpm, which the inverter uses when setting motor control behavior. Dynamic response is influenced by a rotor inertia of 2.87 kgcm². The electrical characteristics also include a phase resistance of 2.4 Ω and a synchronous inductance of 15.8 mH, and the winding uses four pole pairs.
During short dynamic bursts, the drive may command the motor into its peak region, where it can deliver 29.25 Nm while drawing up to 31.0 A. These limits require the controller to supervise current and torque so overload events do not damage the magnetic circuit or overstress the shaft connection. The motor body weighs 4.9 kg, which affects bracket sizing and the total inertia seen by the axis during rapid direction changes. Because the peak demand is much higher than the continuous operating point, the connected servo amplifier must be matched to both sustained and short-term loading.
