8LSA46.R2045C600-3 by B & R Automation

The 8LSA46.R2045C600-3 servo unit is a three-phase synchronous motor from B&R Automation in the 8LS Synchronous Motors series. It is intended for positioning axes and continuous-duty geared systems, where electrical input is converted into controlled rotary motion for automated machinery. Typical uses include pick-and-place gantries, packaging lines, and other industrial equipment that requires accurate speed changes and repeatable positioning. The 8LSA configuration uses standard bearing support rather than reinforced bearings, which helps keep inertia low while maintaining normal load capacity. The motor is designed to operate with compatible drives that regulate current precisely for closed-loop motion control.

Mechanical installation uses a mounting flange with a 100 mm bolt circle, and the shaft end is a smooth cylinder for direct coupling to pulleys or gearboxes. The motor reaches a rated speed of 4500 rpm, and cooling is provided by a self-cooling arrangement that depends on free air circulation over the housing fins. This cooling method avoids the need for a separate motor-mounted blower and keeps the external layout simple. Power and feedback cables leave through a straight top connector, which keeps the cable exit aligned with vertical machine layouts. Length code 6 gives the motor a medium body depth, and an oil seal behind the front bearing helps limit lubricant migration into the coupling area.

Feedback is supplied by a resolver, which provides rotor position information with a precision of 6 arcmin. That feedback arrangement supports stable speed and position control during normal servo operation. The motor has no holding brake, so any static load must be held by the drive or by external mechanical means when the axis is stopped. As a three-phase synchronous motor, it produces torque in relation to commanded current and maintains stable operation through its rated range. The unit is product revision 3, and the fixed flange supports repeatable alignment during installation.