Product Description:

The A2.SM.001-6400 is a synchronous servo motor produced by KEB and assigned to the SM Synchronous Servo Motors series. It is intended to deliver closed-loop rotary motion in industrial automation cells, where it pairs with a drive controller for regulated speed and torque. By converting electrical energy into mechanical shaft power, the unit can position actuators, indexing tables, and small conveyors with repeatable accuracy. Its servo design also supports applications that need responsive speed changes and consistent stopping behavior during cyclic motion.

The motor uses self-cooling, so ambient airflow removes heat without an external fan, and its 157 mm frame length helps it fit compact machines. This cooling arrangement keeps the housing simple and avoids the need for separate forced-air hardware around the motor body. Nominal operation is based on a supply of 400 V; at this voltage, the phase resistance of 25.8 Ω limits electrical load, while the 14.5 mH winding inductance affects current rise during PWM switching. Under steady conditions, it draws 0.9 A and produces a continuous shaft torque of 0.48 Nm. At the rated speed of 6000 rpm, this operating point corresponds to a mechanical output of 300 W. A two-pole resolver on the rear endbell supplies rotor position feedback to the drive, allowing rapid commutation updates and stable speed regulation down to zero.

The dynamic envelope extends beyond the continuous operating point and covers short-term overload operation. During acceleration, the inverter may supply up to 6.0 A, letting the rotor deliver peak torque of 2.5 Nm for brief periods. This added current capacity supports load transients and rapid changes in speed without changing the continuous rating. When the shaft is locked, a stall current of 1 A maintains holding torque of 0.50 Nm without thermal overload. The published voltage constant of 46.4 V/1000 rpm indicates the back EMF that the drive must counteract during regeneration.