Product Description:

The 8MSA3L.R0-66 synchronous motor is produced by B&R Automation and belongs to the 8MS Three Phase Synchronous Motors series. As a three-phase permanent-magnet unit, it supplies rotational energy to servo axes in packaging, printing, and general factory automation. The motor uses a self-cooling housing, routes its power and feedback cabling on the A side, and uses a BRX resolver for position feedback. A smooth shaft end allows direct coupling, and the design is supplied without a holding brake to keep inertia low.

During continuous operation, the machine delivers a rated output of 0.94 kW at 4500 rpm. When locked, it can generate 2.5 Nm of stall torque while phase current rises to 2.61 A, which is close to the rated 2.2 A. Short-term demands are met with a peak current of 11.2 A, producing 10 Nm of peak torque for rapid accelerations. A stator inductance of 15.4 mH, combined with 7 ohms of resistance and a 2.2 ms electrical time constant, shapes current response and helps filter inverter ripple. The torque constant is 0.96 Nm/A, so commanded current is converted directly into torque.

The electrical model is completed by a back-EMF constant of 58 V/1000 min-1, which indicates the drive’s voltage margin at speed. Thermal mass and winding geometry give the motor a heating time constant of 32 min, allowing it to handle intermittent overloads before reaching its limit. Rotor dynamics benefit from an inertia of 1.2 kgcm², and the frame is size 3 with length code L. An oil seal is not fitted, yet the smooth shaft can accept up to 200 N of axial load during installation. Resolver deviation stays within ±1 angular minute of non-linearity and ±10 angular minutes of precision, supporting fine interpolation. The relative rated torque is large, and the mechanics tolerate service speeds up to 12000 min-1 for high-speed applications.