Product Description:

The 8MSA4L.R0-V5 is a three-phase synchronous motor manufactured by B & R Automation and assigned to the 8MS Three Phase Synchronous Motors series. The unit converts drive-inverter current into rotational motion for indexing tables, gantry axes, and other positioning tasks in automated machinery. Its electromagnetic design produces constant torque over a wide speed range, making it suitable for precise servo applications in packaging lines, material-handling systems, and assembly equipment. The synchronous design allows the connected drive to regulate shaft speed and position accurately while responding to changes in the commanded motion profile.

The motor uses a self-cooling architecture, so waste heat is dispersed through the housing fins without external blowers or liquid cooling loops. It has a motor size of 4, providing a midrange flange diameter that fits standard gearbox interfaces. The axial stack has a motor length of L, which increases the available magnetic surface area for a higher continuous torque rating. Its relative rated torque is classified as large, placing this model in the upper torque band available within its frame class. Rotor position feedback is generated by a resolver, allowing the connected servo drive to close its speed and position loops. This feedback method is well suited to areas with substantial vibration, where optical encoders may be less tolerant of operating conditions.

The analog resolver package supports accurate motion feedback throughout operation. Mechanical coupling error is limited to ±1 angular minute, ensuring minimal offset between the commanded position and the measured shaft angle. Repeatability across the full electrical revolution is maintained within ±10 angular minutes, supporting smooth velocity control at low speeds. The feedback components use the BRX resolver platform, which maintains stable excitation impedance during temperature changes and helps prevent gain drift in the drive electronics. Housing-based heat dissipation reduces the need for additional ventilation hardware around the motor. The extended magnetic stack provides the torque capacity needed for demanding positioning cycles, while the resolver supplies continuous angular feedback to the servo drive. These operating characteristics support controlled acceleration, low-speed movement, and repeatable positioning under continuous-duty loads.