Abstract
This paper considers the development of a practical, low cost bearingless motor system for use in large industrial applications. Bearingless motor technology is proposed as an ultra efficient, highly integrated solution in fluid handling systems which currently use high speed (over 7 kRPM) centrifugal blowers/pumps. Over 40 potential industrial users have been interviewed to identify their needs and the shortcomings of current commercial solutions, with an emphasis placed on wastewater treatment. Based on these interviews, a motor topology is selected, a novel bearingless motor is designed, and 3D finite element analysis (FEA) is used to investigate the design space and tradeoffs. Mechanical design constraints on the high speed rotor geometry are considered as well as a detailed magnetic design for a 30 kRPM, 100kW system. Preliminary analysis indicates an efficiency of 96.5 percent. The resulting design is a highly novel 4-pole bearingless ac homoplar motor utilizing a Dual Purpose No Voltage (DPNV) Winding, which to the authors' knowledge has not previously been investigated in this configuration.
Original language | English (US) |
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Title of host publication | 2017 IEEE International Electric Machines and Drives Conference, IEMDC 2017 |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
ISBN (Electronic) | 9781509042814 |
DOIs | |
State | Published - Aug 3 2017 |
Event | 2017 IEEE International Electric Machines and Drives Conference, IEMDC 2017 - Miami, United States Duration: May 21 2017 → May 24 2017 |
Publication series
Name | 2017 IEEE International Electric Machines and Drives Conference, IEMDC 2017 |
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Other
Other | 2017 IEEE International Electric Machines and Drives Conference, IEMDC 2017 |
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Country/Territory | United States |
City | Miami |
Period | 5/21/17 → 5/24/17 |
Bibliographical note
Publisher Copyright:© 2017 IEEE.
Keywords
- bearingless motors
- combined windings
- compressors
- magnetic suspension
- self-bearing motors