Product Description:

The A3.SM.502-62B0 is a synchronous servo motor manufactured by KEB as part of the SM Synchronous Servo Motors series. Designed for compact axes and pick-and-place modules, the unit converts electrical power into controlled rotary motion for industrial automation systems. The frame follows the A3 size code and attaches through a B5 IFT5-compatible flange, while a self-cooling housing simplifies mounting inside general-purpose machinery. The motor weighs 1.7 kg, so it can be integrated into end effectors without adding excessive mass.

Its protection rating of IP54 keeps harmful dust deposits and water splashes from reaching the stator windings. Under dynamic duty cycles, the rotor can accelerate to a maximum speed of 9000 rpm, where a peak electromagnetic torque of 3.8 Nm is available for short bursts. These transients draw up to 13.2 A from the inverter, so conductor sizing must account for that peak value. In continuous operation, the shaft delivers a rated torque of 0.80 Nm at 6000 rpm while drawing 2.54 A. Stall limits of 1.21 Nm and 2.52 A permit position holding, although an external method is needed to retain the load after motor power is removed.

Closed-loop control is handled by the two-pole SSBH-15-E-5 resolver, which supplies analog position feedback to the drive. When supplied with the nominal stator voltage of 190 V from a 320 V DC bus, the six-pole rotor produces up to 0.50 kW of mechanical power. A rotor inertia of 0.23 kg·cm² supports quick axis acceleration while keeping drive gains moderate. The back electromotive force slope is 29.6 V/1000 rpm, providing predictable voltage utilization as speed increases. A phase inductance of 3.7 mH and a winding resistance of 5.8 Ω support stable current regulation. The motor has no holding brake and uses a smooth shaft without a feather key, making it suitable for couplings that transfer torque through friction clamping.