Flat Motors Technology − short and to the point
The multipole design of maxon flat motors with an external rotor delivers maximum torques in a short overall length. The open design with an optional fan further improves the heat dissipation. The iron-core winding results in a slight cogging torque. Flat motors offer an attractive price-performance ratio.
1 Front flange 2 Housing 3 Stator packet 4 Winding 5 Permanent magnet 6 Shaft 7 Print with Hall sensors 8 Ball bearing 9 Preload 10 Rear flange
Front
Flat Motors Properties
ECX FLAT Specific properties of the maxon ECX FLAT range: – Very high torques as a result of the NdFeB magnet segments in the rotor and the open design – Short and long versions with diameters ranging from 22 mm to 42 mm – Version with integrated electronics – Cost-optimized version with ring magnet – Mechanical and electrical interfaces can be configured online – Optional MILE encoder with minimal effect on overall length – Version with fan for active cooling EC flat Specific properties of the EC flat range: – Diameters of 60 mm and 90 mm – Optional MILE encoder with minimal effect on overall length
Specifications Thermal behavior and cooling
– Brushless DC motor (BLDC) with an attractive price-performance ratio – External multipole rotor for high torques – Open design for excellent heat dissipation at higher speeds – Stationary winding with iron core and multiple teeth per phase – Variants with open rotor or fan for even higher torques – Flat design suitable even for tight installation spaces – Gradients that deviate from strictly linear behavior – Slight cogging torque – Speeds of up to 20,000 rpm – Hall sensor signals can be used for basic speed and position control
The flat design results in higher surface losses and the heat dissipation must be carefully managed, especially under continuous load. ECX FLAT motors can optionally be equipped with a fan to actively support cooling. Speed limits Designs with external rotor allow high torques, but lower maximum speeds compared to designs with internal rotors. Axial and radial forces Due to their design, flat motors frequently have lower axial load capacities. Bear- ing and gearhead effects must be carefully considered. Cogging torque The flat motors are designed for maximum power density with minimal cogging torque. The high-torque versions of the ECX FLAT motors feature segments made of high- performance magnets. This produces very high torques, resulting in a slightly higher cogging torque.
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