8MSA3L.E1-46 B & R Automation
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The 8MSA3L.E1-46 is a synchronous motor manufactured by B & R Automation and belongs to the 8MS Three Phase Synchronous Motors series. It is a self-cooling motor size 3, length L, with a permitted axial force during installation of 200 Newtons. The motor features a multi-turn EnDat encoder with a resolution of 512 lines, precision of ±60 seconds, and can recognize up to 4096 revolutions.
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Product Description:
The 8MSA3L.E1-46 synchronous motor is built by B&R Automation for the 8MS Three-Phase Synchronous Motors series. Classified as an 8MS product, this brushless unit converts electrical power into rotational motion for machine tools, packaging stations, and pick-and-place gantries. A permanent-magnet rotor and digital feedback allow motion controllers to regulate speed and position precisely. The size 3 frame fits compact mechanical spaces, while the self-contained design eliminates the need for external cooling accessories and reduces the amount of supporting equipment required around the motor.
Heat is dissipated through a self-cooling design, so the motor does not require a fan or liquid cooling loop. Position feedback is supplied by a digital encoder that supports carrier frequencies of at least 100 kHz at -3 dB, helping maintain reliable signal transmission at high shaft speeds. The measuring system limits angular error to ±60 arcseconds. Each revolution is divided into 512 lines before interpolation, providing the resolution needed for accurate position and speed regulation. The digital interface uses the EnDat protocol to transmit absolute position values and diagnostic data over differential signal pairs. This feedback arrangement gives the connected controller the information required to correct motion errors during changing loads and rapid acceleration.
The encoder has a multi-turn capability that retains the shaft position across power cycles, allowing the machine to resume operation without repeating a homing sequence. It can distinguish as many as 4,096 revolutions, extending absolute position tracking beyond a single shaft rotation. During assembly, the shaft can withstand an axial installation load of up to 200 N when pressed against the thrust bearings, allowing suitable fixtures to be applied without additional support rings. The stator uses motor length L, which matches the size 3 flange arrangement while providing an extended magnetic stack for increased continuous torque. Its large relative rated torque supports applications that require substantial holding or low-speed output from a compact motor. The combination of absolute feedback, axial load capacity, and an extended stator makes the motor suitable for tightly integrated servo axes with demanding motion profiles.
