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High-Speed Brushless Doubly-Fed Machines for Aviation Propulsion Applications

Wang, Xiaodan
http://orcid.org/0000-0002-3825-8387
http://rave.ohiolink.edu/etdc/view?acc_num=osu1668566560215547

Abstract Details

2022, Doctor of Philosophy, Ohio State University, Electrical and Computer Engineering.
The growth in global air traffic, increasing fuel energy consumption, the demand for decreasing noise, and lower maintenance costs have encouraged people to move forward to more electric aircraft (MEA). Driven by this motivation, the portion of electric power over the total power consumed onboard aircraft has increased significantly over the past decade as electric power systems progressively take the place of pneumatic, hydraulic and mechanical systems. However, these electric power supplies, known as the secondary power source on aircraft, only account for around 10% of the total energy. Over 90% of the total energy is consumed by the propulsion system which is the primary source. Recently, significant innovations have been achieved in the electrification of the primary source. A turboelectric distributed propulsion (TeDP) system is considered as a promising candidate in primary source electrification. Instead of using the integrated drive generator (IDG) to convert the varying speed of the jet engine into a constant speed through hydraulic systems, the main generator of a TeDP system is directly coupled to the jet engine via a gearbox. The elimination of the IDG eliminates the need for bulky and heavy mechanical components that require constant maintenance. At the same time, this innovation leads to a higher requirement for the electric machines for the aircraft industry. The weight, volume, reliability, and power density features of electric machines all play a critical role in the overall aircraft performance. Traditional electric machines that can be applied in a TeDP system include permanent magnet synchronous machines, induction machines, switch reluctance machines, and so on. Compared to traditional electric machines, a brushless doubly-fed machine (BDFM) possesses the advantages of a smaller converter size due to the fractional power rating and high reliability due to the absence of rare earth materials. This work aims to demonstrate the possibility of a high-speed BDFM applied in the aviation propulsion system. The literature review in this work has shown that the state-of-the-art BDFMs were mostly researched in power generation applications that require relatively low speed and low power. BDFMs in high-speed and high-power applications are of research interest and are under investigation. To have a thorough understanding of the fundamental machine operation principles, both theoretical and electromagnetic analyses were elaborated on the rotor field modulation. The mathematical model of the machine was introduced to describe the machine's behavior. A simulation model of the BDFM was built based on the mathematical model in Matlab Simulink and fully verified by the finite element simulations in Ansys. The vector control scheme was adopted for the machine control. Speed control of the machine was realized and the maximum torque per ampere was achieved. Besides the machine modeling and control, this work also includes the design of a 75-kW SiC-based three-phase power converter that was used as the motor drive. Experimental test results are presented to show the capability of the motor drive system. Test results of the BDFM prototype and the motor drive systems are provided. In the end, the work is summarized and future work is proposed.
Julia Zhang (Advisor)
Jin Wang (Committee Member)
Longya Xu (Committee Member)
Brian Winer (Committee Member)
197 p.
Electrical Engineering; Engineering
Brushless doubly-fed machine, machine control, motor drive, more electric aircraft

Recommended Citations

Citations

  • Wang, X. (2022). High-Speed Brushless Doubly-Fed Machines for Aviation Propulsion Applications [Doctoral dissertation, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1668566560215547

    APA Style (7th edition)

  • Wang, Xiaodan. High-Speed Brushless Doubly-Fed Machines for Aviation Propulsion Applications. 2022. Ohio State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1668566560215547.

    MLA Style (8th edition)

  • Wang, Xiaodan. "High-Speed Brushless Doubly-Fed Machines for Aviation Propulsion Applications." Doctoral dissertation, Ohio State University, 2022. http://rave.ohiolink.edu/etdc/view?acc_num=osu1668566560215547

    Chicago Manual of Style (17th edition)

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This open access ETD is published by The Ohio State University and OhioLINK.