Product Description:

The 8MSA5M.R0-B5 is a three-phase synchronous motor manufactured by B&R Automation as part of the 8MS Three Phase Synchronous Motors series. Designed for servo axes in packaging, printing, and material-handling equipment, the unit converts regulated inverter current into repeatable torque and speed. Its electrical construction supports closed-loop positioning, allowing the motor to act as the primary mover in automated stations where cycle time, positional consistency, and repeatable motion control are critical.

With a rated mechanical speed of 3000 rpm, the rotor can follow high-frequency command changes while staying within nominal stress limits. Heat is removed through a self-cooling housing, so no external blower or liquid circuit is required. Power, feedback, and brake conductors are routed from side B of the frame, which can simplify cable routing in line machines. The active diameter corresponds to size 5, and stack-depth code M indicates the motor’s axial length within this frame family. This combination provides the electromagnetic cross-section needed for medium relative rated torque while keeping the package compact. Because neither an oil seal nor a brake is fitted, bearing drag remains low and the inertial response to load changes stays consistent.

Position feedback is generated by a resolver built to the BRX standard. Its transfer characteristic keeps nonlinearity within ±1 angular minute, while overall precision across the full electrical cycle is held to ±10 angular minutes. These values let the drive resolve fine position increments at nominal speed and maintain accuracy during stall detection. The keyed output shaft promotes slip-free torque transmission and supports secure coupling to hubs or pulleys. The feedback arrangement also supports stable commutation and speed control across the motor’s operating range.