Aerotech S Series Brushless, Frameless Torque Motors

The S-series motors are Aerotech’s high-performance brushless, frameless

torque motors. The motors feature rare-earth magnets for maximum

torque and acceleration in a compact assembly – while delivering excellent

velocity stability.

Design Features

• Slotless, brushless ring motors with high torque output and zero cogging

• Frameless design for easy integration into OEM machines

• Various winding options available

• Includes Hall effect sensors for commutation

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

High-Performance Design

The S-series motors utilize a slotless stator design and high pole-count rotor

to provide zero cogging for exceptional velocity stability. The laminations

contain no slots, eliminating torque ripple and cogging torque that produces

velocity disturbance. The S-series motors are well-suited for direct-drive

applications such as printing and scanning where velocity ripple cannot be

tolerated.

Wide Range of Output Torque and Sizes

The S-series slotless motors cover a wide range of torque and package sizes.

Continuous torque ranges from 0.20 N·m to 29.09 N·m. Peak torque ranges

from 0.82 N·m to 116.37 N·m. The open design of the S-series motors allows

for custom winding or mechanical variations to meet any application need.

The S-series motors are designed for applications in OEM machines.

The S-50 (50 mm diameter) motor is ideal for small, tight spaces such as

spindles or small feed rolls. The S-180 (180 mm diameter) and S-240 (240

mm diameter) can accelerate large print drums or precision positioning tables.

Easy Machine Integration

All S-series motors are supplied as two pieces – a slotless stator and a

permanent magnet rotor. The stator is a standard 3-phase winding assembly

with Hall-effect devices. They can be driven using a simple six-step or

sinusoidal commutation algorithm. Aerotech’s Ndrive series amplifiers are

performance-matched to the S-series motors for easy integration.

The hollow rotor mounts directly to a drive axis with no gearing required.

Custom variations can be engineered to your requirements with minimal

lead time.