Product Description:

The 8MSA4L.R0-46 is a three-phase synchronous motor manufactured by B & R Automation within the 8MS Three Phase Synchronous Motors series. It serves as the rotary drive element in automation cells, supplying constant torque and repeatable speed so that servo amplifiers can position tooling or material with minimal overshoot. Because the rotor remains synchronized with the magnetic field generated by the drive frequency, the unit is suitable for deterministic motion and rapid acceleration on packaging lines, assembly stations, and compact transfer modules.

Thermal management for this model relies on a self-cooling design, meaning the housing dissipates heat without auxiliary fans or liquid circuits. With a frame classified as size 4 in the 8MS size code, the motor offers a compact cross-section while retaining the longer active stack indicated by the L length index. The electromagnetic package provides a large relative rated torque, allowing the shaft to deliver higher continuous torque than shorter or smaller units in the same series. Integration with machine cabinets is streamlined because the encoder, power, and brake interfaces follow the common 8-pin and 2-pin plug conventions used across compatible drives.

Rotor position feedback uses a resolver, allowing the drive to sample analog sine-cosine signals for closed-loop control without digital communication overhead. The installed feedback element is the BRX type, which provides noise immunity in environments with high switching voltages. Its nonlinearity remains within ±1 angular minute, so the electrical angle deviates only slightly from the mechanical reference across one revolution. Overall calibration accuracy remains within ±10 angular minutes across the full temperature and speed range, providing sufficient resolution for mid-range servo tasks such as indexing tables and pick-and-place heads.