Aerotech BMS Series Brushless, Slotless Rotary Motors

Aerotech’s BMS series brushless, slotless servomotors represent the

ultimate in high-performance rotary motors. Available in standard NEMA

frame sizes, these motors utilize a slotless stator design for superior

velocity smoothness and control. Featuring rare-earth magnets and a

high pole-count rotor, the BMS series provides extremely smooth velocity

control in a small package. Custom mechanical or electrical variations of

the BMS can be engineered with minimal lead time.

Design Features

• Slotless, brushless stator design provides zero cogging torque for

unsurpassed velocity control

• Smoother velocity than with standard DC brush-type motors with the

advantage of reliable brushless technology

• Standard NEMA frame sizes

• Ultra-high resolution capability with amplified sine-wave encoder and

multiplier

• CE approved, follows the EU 2015/863 RoHS 3 directive

Smoother than DC Motors

The BMS series motors can replace standard brushless or brush-type

motors when superior velocity smoothness and control are required.

DC brush-type motors have been popular in applications such as machine

tool and scanning because of their smooth low-speed control. The BMS

motors provide superior smoothness and have higher acceleration capability

than a DC brush motor. Higher acceleration results in higher machine

throughput and performance.

High Performance Design

The BMS series is unlike conventional brushless servomotors because it

incorporates a totally slotless stator design that provides the ultimate in

smooth velocity control. These motors are designed for applications requiring

superior torque and stability performance. The unique design of the BMS

series motors provides a closer inertia match with mechanical systems than

comparable models. This means better stability and easier tuning.

Ultra-High Encoder Resolution

The BMS series motors can be equipped with a variety of encoder resolution

options for any application. In addition to the standard RS-422 line driver

output, an optional amplified sine-wave encoder can be used to provide ultra

-high resolution. Aerotech offers encoder multipliers as an option for drives

connected to the A3200 system, as well as external multiplier boxes.

Resolutions as high as 1.000.000 counts per revolution are achievable.