8MSA3S.R0-AI02 B & R Automation
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The 8MSA3S.R0-AI02 is a three-phase synchronous motor manufactured by B & R Automation. Part of the 8MS Three Phase Synchronous Motors series, it features a self-cooling system and a BRX resolver for precise encoder technology. The motor has a size of 3, length S, and allows a permitted axial force of 200 Newtons during installation.
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Product Description:
The 8MSA3S.R0-AI02 belongs to the 8MS Three-Phase Synchronous Motors series from B & R Automation. It is a three-phase permanent-magnet servo motor that converts drive current from a compatible inverter into controlled rotary motion for positioning tables, packaging axes, and material-handling modules in automated plants. When paired with an ACOPOS drive, the motor forms a feedback-regulated axis that supports the precise velocity and torque commands required in industrial automation. Its permanent-magnet design provides responsive operation for applications that require repeatable acceleration, deceleration, and positioning.
The housing employs a self-cooling design, so heat dissipates through the frame without forced airflow, simplifying machine installation and reducing maintenance associated with external fans. Rotor position is reported by a resolver feedback system, enabling the drive to close its control loop in electrically noisy environments. The motor has a size code of 3, which indicates its stator diameter, and a length code of S, which indicates the shortest magnetic stack in the series. This compact combination keeps rotor inertia low and supports quick acceleration during repetitive motion cycles. During mounting, the shaft can accept an axial preload of 200 N, allowing a rigid coupler to be installed without exceeding the bearing limit.
The motor has a small relative rated torque, making it suitable for gear-driven axes or direct-drive loads with modest torque requirements. Position feedback is supported by a resolver nonlinearity of ±1 angular minute, so the electrical interpolation error remains within a narrow range over a complete revolution. The resolver has a precision of ±10 angular minutes, indicating the permitted absolute alignment variation between the rotor and signal windings after repeated thermal cycles. The sensing element uses a BRX resolver, which supports integration with the standard feedback cabling and drive parameters intended for this motor platform. Resolver feedback also provides a durable position-sensing method without relying on delicate optical components, making it suitable for industrial machinery exposed to vibration and electrical interference.
