8MSA5L.R0-V6 B & R Automation
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The B & R Automation 8MSA5L.R0-V6 is a three phase synchronous motor from the 8MS Three Phase Synchronous Motors series. This motor uses a self-cooling system and features a resolver encoder with a BRX type, offering a precision of ±10 angular minutes. It comes in motor size 5 and length L, and is designed for applications requiring a large relative rated torque.
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Product Description:
The 8MSA5L.R0-V6 is manufactured by B & R Automation for the 8MS Three Phase Synchronous Motors series. It is a three-phase permanent-magnet motor intended for coordinated motion tasks in industrial automation, where it can drive conveyor sections, indexing tables, or articulated robot joints under the control of an ACOPOS inverter. Integrated position feedback allows the controller to synchronize electrical excitation with the rotor angle, maintaining commanded speed and torque during rapid load changes. This closed-loop operation supports precise acceleration, deceleration, and positioning across demanding production cycles.
The motor relies on a self-cooling housing that dissipates heat through its aluminum frame, so no external fan or liquid cooling jacket is required. The frame designation of 5 indicates the stator diameter and provides a known mounting pattern and shaft height for gearhead or coupling selection. A stack length code of L extends the active magnetic core, increasing continuous torque without changing the flange outline. B & R classifies the motor in the large relative rated torque category. This ranking indicates that the motor can deliver greater sustained torque than other motors of the same frame size, which helps when accelerating loads with high inertia. Shaft angle is monitored by a resolver, an electromechanical sensor that produces analog sine-cosine signals and tolerates electrical noise better than many digital feedback devices in harsh industrial environments.
The feedback device uses the B & R-specific BRX resolver format, allowing direct connection to compatible standard drive cables. Resolver nonlinearity remains within ±1 angular minute, keeping positional deviation caused by internal analog errors low for most servo control loops. Absolute precision across the full electrical cycle remains within ±10 angular minutes, supporting fine contouring at slow speeds where small angular errors have a greater effect on motion accuracy. The resolver supplies continuous rotor-angle information to the drive, allowing the inverter to regulate motor current throughout each revolution. Its analog feedback signals also provide reliable operation in machinery where switching devices, power cables, and other equipment may generate electromagnetic interference.
