Congrats to Bharat, Imthiaz, Martin, Steve!!
Bharat completed his MS project investigating the electromagnetic design, control, and testing of high speed bearingless permanent magnet machines for e-Turbocharger applications. Bharat has delved into the nitty gritty details of machine design sizing and optimization while also developing control hardware, and ultimately spinning a machine up to 30,000 r/min.
You can read more about Bharat’s research here:
- B. Ramadas and E. L. Severson, “Suspension Force Design Guidelines for Bearingless Permanent Magnet Machines,” 2021 IEEE Energy Conversion Congress and Exposition (ECCE), 2021, pp. 4554-4561, doi: 10.1109/ECCE47101.2021.9595597.
- B. Ramadas and E. L. Severson, “Detailed Investigation Into Design Guidelines for Bearingless Permanent Magnet Machines,” IEEE Transactions on Industry Applications, under review.
Imthiaz completed his MS project investigating the development of a high speed bearingless permanent magnet generator for combined heat and power generation. He has explored several different slot-pole combinations and found that it is possible to design high performance generators that are able to levitate their shaft.
You can read more about Imthiaz’s research here:
- I. Ahmed and E. L. Severson, “Bearingless Generator Design and Optimization for High-Speed Applications,” 2021 IEEE Energy Conversion Congress and Exposition (ECCE), 2021, pp. 4562-4569, doi: 10.1109/ECCE47101.2021.9595687.
Martin finished his MS Thesis in Mechanical Engineering, entitled “Multi-Physics Design Sizing of High-Speed Surface Mounted Permanent Magnet Motors to Improve Design Ratings.” Martin’s work explores several potential effectiveness of several avenues to increase the power density PM machines, including direct slot cooling and advanced materials.
Martin has been involved in many of our machines projects, starting as an undergraduate researcher. You can read more about his work in the following publications:
- M. Johnson, K. Hanson and E. L. Severson, “Normalized Analytical Model of Stresses in a Surface Mounted Permanent Magnet Rotor,” 2021 IEEE Energy Conversion Congress and Exposition (ECCE), 2021, pp. 3928-3935, doi: 10.1109/ECCE47101.2021.9595523.
- J. Chen, M. W. Johnson, A. Farhan, Z. Wang, Y. Fujii and E. L. Severson, “Reduced Axial Length Pole-Specific Rotor for Bearingless Induction Machines,” in IEEE Transactions on Energy Conversion, doi: 10.1109/TEC.2022.3172017.
- F. Nishanth, M. Johnson and E. L. Severson, “A Review of Thermal Analysis and Management of Power Dense Electric Machines,” 2021 IEEE International Electric Machines & Drives Conference (IEMDC), 2021, pp. 1-8, doi: 10.1109/IEMDC47953.2021.9449520.
- J. Chen, Y. Fujii, M. W. Johnson, A. Farhan and E. L. Severson, “Optimal Design of the Bearingless Induction Motor,” in IEEE Transactions on Industry Applications, vol. 57, no. 2, pp. 1375-1388, March-April 2021, doi: 10.1109/TIA.2020.3044970.
- A. Farhan, M. Johnson, K. Hanson and E. L. Severson, “Design of an Ultra-High Speed Bearingless Motor for Significant Rated Power,” 2020 IEEE Energy Conversion Congress and Exposition (ECCE), 2020, pp. 246-253, doi: 10.1109/ECCE44975.2020.9236181.
- J. Chen, A. Farhan, M. Johnson and E. L. Severson, “Design of Bearingless Permanent Magnet Motors Using No Voltage Combined Windings,” The 10th International Conference on Power Electronics, Machines and Drives (PEMD 2020), 2020, pp. 803-808, doi: 10.1049/icp.2021.1116.
Steve finished his MS project developing advanced electric machine drives. Steve investigated ac homopolar motors with passive electromagnetic rotor vibration damping, development of a generator drive for an ultra-high speed generator (80,000 – 120,000 r/min!!!), and EMI mitigation in WBG power electronic motor drives.