Product Description:

The 8MSA3S.R0-AC02 is a three-phase synchronous motor manufactured by B&R Automation for the 8MS Three Phase Synchronous Motors series. It is intended for integration into servo axes where consistent electromagnetic torque and precise rotor position feedback are required. When coupled with a compatible inverter, the motor drives conveyor sections, pick-and-place heads, or indexing tables, converting electrical input into controlled mechanical rotation for industrial automation tasks that demand repeatable motion and minimal scheduled maintenance across packaging, assembly, and inspection systems.

Its thermal management relies on self-cooling, allowing heat to dissipate through the housing without external fans, which simplifies system layout and reduces particulate ingress. Rotor position is detected with a resolver, an electromechanical sensor that supplies sine and cosine signals to the drive. Dimensionally, the unit falls under motor size 3, a diameter class that balances torque density with envelope restrictions, while the active magnetic stack is the shortest variant, identified as motor length S for reduced inertia in fast-cycling axes. During mechanical assembly, the shaft may be loaded with up to 200 N of axial force, allowing couplings or belt pulleys to be preloaded without risking bearing damage.

The torque class is small, so this model suits axes where space or acceleration is prioritized over sustained heavy drive output. Control precision is supported by tight feedback tolerances; resolver nonlinearity does not exceed ±1 angular minute, and overall resolver precision is held within ±10 angular minutes, limiting position error in closed-loop control. The sensing element is the BRX resolver type, maintaining electrical compatibility with B&R drive electronics and predictable phase shifts over the operating temperature range.