Innosuisse project in collaboration with an industrial partner
400’000 rpm – 40 W – 12.7 mm diameter motor prototype.
Project description
One of the purposes of increasing speed for electrical motors is that, for a given power, the size of the machine can be reduced, increasing the power density, lowering the weight and the bulk. This is consistent with the fact that the diameter of the rotor has to diminish while the rotational speed increases to withstand centrifugal forces. After an important modelling work of multiphysics phenomena in small-scale very-high-speed motors, a 400’000 rpm – 40 W – 12.7 mm diameter motor prototype has been manufactured and successfully tested up to 475’000 rpm. The applications of such a machine can be micro-gas turbine generators, beam choppers for optics or hand tools for otorhinolaryngology or dental surgery amongst others.
Publications
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Conference Papers
Very-High-Speed Miniaturized Permanent Magnet Motors: Modeling and Experimental Validation
2019. The 11th Annual Energy Conversion Congress and Exposition (ECCE2019), Balimore, MD, USA, September 29 – October 3, 3019. p. 5251-5257. DOI : 10.1109/ECCE.2019.8913079.Very-High-Speed Miniaturized Permanent Magnet Motors: Design and Optimization
2019. The 11th Annual Energy Conversion Congress and Exposition (ECCE2019), Baltimore, MD, USA, September 29 – October 3, 2019. p. 5258-5264. DOI : 10.1109/ECCE.2019.8912205.Optimization of shape and topology for slotless windings in BLDC machines
2018. The 2018 International Conference on Electrical Machines and Systems (ICEMS), Jeju, South Corea, October 7-10, 2018. p. 31-36. DOI : 10.23919/ICEMS.2018.8549062.Very-High-Speed Permanent Magnet Motors: Mechanical Rotor Stresses Analytical Model
2017. 2017 IEEE International Electric Machines and Drives Conference (IEMDC), Miami, FL, USA, May 21-24, 2017. DOI : 10.1109/IEMDC.2017.8002066.Density-Based Topology Optimization of Conductor Paths for Windings in Slotted Electrical Machines
2019. 22nd International Conference on Electrical Machines and Systems (ICEMS 2019), Harbin, China, August 11-14, 2019. DOI : 10.1109/ICEMS.2019.8921728.Theses
Small scale very high speed slotless permanent magnet motors
Lausanne, EPFL, 2020.Patents
Electrical machines winding
CH715403; CH715403.
2018.