8LSA25.D9060S300-3 by B & R Automation

The 8LSA25.D9060S300-3 is a three-phase synchronous motor built by B&R Automation for the 8LS Synchronous Motors series. It follows the 8LSA configuration, meaning a standard construction without reinforced bearings, and it is product revision 3. A hybrid single-cable connector carries power, encoder signals, and brake control, simplifying installation inside compact machines. This arrangement reduces cable space at the motor and keeps routing simpler where machine frames leave little room for separate plugs. Inductive EnDat 2.2 feedback provides 19-bit single-turn and 12-bit multi-turn resolution, while the counter stores up to 4096 revolutions. Intended for precise axis control, the unit mounts to a 58 mm flange and relies on self-cooling through free air circulation.

Electrical performance centers on a rated speed of 6000 rpm while drawing a nominal current of 0.71 A. The motor has a torque constant of 0.73 Nm/A, so every ampere produces predictable rotary force. For transient acceleration, the drive may supply up to 3.7 A. The copper windings have a stator inductance of 49.6 mH and a resistance of 34.63 ?, and these values influence current rise and drive tuning. Four pole pairs work with the keyed shaft to generate 0.52 Nm of continuous torque at the nominal operating point, and the design omits a shaft seal to minimize friction.

Peak output reaches 2.4 Nm. A standard holding brake secures the rotor with 2.2 Nm when power is removed. The rotor's mass moment is only 0.16 kg·cm², allowing fast reversals without adding much inertia to the drive train. This low inertia supports quick response during indexing and short positioning moves. Under full load, the motor can supply 327 W of power, and a stall torque of 0.6 Nm helps maintain position during low-speed processes. A voltage constant of 43.98 V per 1000 rpm aligns with common low-voltage inverters, and the encoder feedback helps preserve accuracy during extended duty cycles.