Product Description:

The 8MSA4L.R0-31 is a three-phase synchronous motor produced by B&R Automation for the 8MS Three Phase Synchronous Motors series. The unit serves as a drive element that delivers controlled motion for conveyors, gantries, and positioning tables that rely on precise electronic commutation. Its synchronous design maintains consistent operation under variable loads, supporting the deterministic motion required in industrial automation cells.

The motor reaches a nominal speed of 3000 rpm, allowing direct coupling to gearboxes or belt transmissions sized for high-cycle machinery. Heat is removed through a self-cooling system, so no external fan or liquid circuit is required. Position feedback is handled by a resolver, which provides analog sine-cosine signals that the drive converts into digital angle data. All power and feedback conductors exit on the A-side, supporting cable routing inside compact enclosures. Mechanical power is transferred through a keyed shaft that prevents slippage between the motor and attached hubs or pulleys.

The motor has a large relative rated torque classification, supporting the acceleration of heavy inertial loads without requiring an oversized frame. Resolver nonlinearity is limited to ±1 angular minute, keeping electrical angle deviation low across an electrical revolution. Its absolute precision is limited to ±10 angular minutes. The sensor uses a BRX resolver type that is compatible with B&R drives and supports stable modulation depth and temperature performance. Motor length code L and frame size 4 provide an enclosure suited to machines with a medium-sized installation footprint. The motor is supplied without a holding brake, so an external mechanism or drive-applied torque must retain stationary loads when necessary. It also has no oil seal and is intended for clean production areas where the shaft is not exposed to lubricants or process fluids.