8LSA75.DB030S000-3 by B & R Automation

The 8LSA75.DB030S000-3 is a three-phase synchronous motor from B&R Automation in the 8LS Synchronous Motors series, intended for servo axes that require precise speed and position control in assembly cells, packaging machines, and gantries. It is suited to motion systems that need repeatable axis behavior during indexing, positioning, and steady-speed operation. The 8LSA configuration uses a standard housing without reinforced bearings, and revision 3 is supplied without a holding brake or oil seal. A hybrid single-cable connection with an integrated connector carries both power and Inductive EnDat 2.2 feedback, which helps reduce cabinet wiring. Self-cooling through free air circulation eliminates the need for external blowers, and the mounting flange uses a 190 mm interface for installation.

Under continuous load, the motor produces a nominal output of 9425 W from a nominal torque of 30 Nm at a rated speed of 3000 rpm. The drive electronics must supply 18.4 A of phase current at this operating point, while the voltage and torque constants support the motor's electromagnetic response. Peak output reaches 187 Nm of maximum torque, and the motor also has a 26.38 A stall current with a stall torque of 43 Nm. Five pole pairs support commutation behavior and contribute to stable current dynamics, while encoder resolution is 19/12 bits for single-turn and multi-turn feedback with a 4096-revolution multi-turn counter for absolute positioning.

The rotor inertia is 74 kgcm², giving predictable acceleration characteristics for this length code 5 frame, which has a mass of 28 kg. During short acceleration peaks, the inverter may momentarily deliver up to 168.71 A of maximum current without exceeding thermal limits. The motor uses a stator inductance of 3.9 mH and a winding resistance of 0.21 Ω, which help limit inrush current and smooth torque response. A smooth shaft end mates directly with keyed or clamped couplings, and the housing supports accurate alignment during installation.