8MSC6X.R0-X400-2 B & R Automation
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The 8MSC6X.R0-X400-2 is a three phase synchronous motor manufactured by B & R Automation as part of the 8MS Three Phase Synchronous Motors series. It features a separately cooled system, motor size 6, and motor length X. This model uses BRX resolver encoder technology with extra large relative rated torque.
Internal Product Review
The 8MSC6X.R0-X400-2 is an 8MS three phase synchronous motor from B & R Automation with separate cooling and extra-large relative rated torque. Resolver-based BRX feedback supports precise control and dependable servo integration. A resolver non-linearity of ±1 angular minute stands out as a strong performance advantage.
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Product Description:
The 8MSC6X.R0-X400-2 is a three-phase synchronous motor manufactured by B&R Automation for the 8MS Three-Phase Synchronous Motors series. The unit supplies rotational power to gantries, packaging axes, and other motion modules that require constant torque at synchronized speeds under servo control. As part of a modular platform, it connects to compatible drive amplifiers through a feedback channel, allowing the controller to close position and velocity loops directly on the motor shaft. This closed-loop arrangement supports accurate acceleration, deceleration, and positioning during repetitive machine cycles.
The housing uses a separately cooled design, so an external airflow path removes heat instead of relying on surface convection. This cooling method permits higher continuous current without excessive temperature rise during sustained operation. Position feedback is provided by a resolver, which withstands vibration better than many optical encoders and outputs the rotor angle for servo regulation. The motor length X indicates an extended magnetic core that provides additional power density while maintaining the same flange pattern. The unit has motor size 6, which establishes the stator diameter and compatible gearbox interfaces. Its continuous torque class is extra large, indicating that its rated torque exceeds the baseline level for other 8MS motors with the same frame size.
The resolver’s internal nonlinearity is limited to ±1 angular minute, supporting accurate rotor-position measurements throughout each revolution. Its repeatability across temperature changes remains within ±10 angular minutes, helping the drive maintain consistent feedback as operating conditions change. These accuracy values are associated with the BRX resolver type, which uses two pole pairs and a laminated steel core to reduce harmonic distortion. Tight feedback tolerances allow the drive to run high-bandwidth current loops with stable phase margins, producing smoother motion at low speeds. The feedback accuracy also supports synchronization among multiple motor axes where small position differences could affect coordinated machine movement.
