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Fault-Tolerant Integrated Modular Motor Drive for Applications with Demanding Reliability Requirements.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Fault-Tolerant Integrated Modular Motor Drive for Applications with Demanding Reliability Requirements./
Author:	Swanke, James A., III.
Description:	1 online resource (420 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 84-07, Section: B.
Contained By:	Dissertations Abstracts International84-07B.
Subject:	Electrical engineering. -
Online resource:	click for full text (PQDT)
ISBN:	9798368469072

Fault-Tolerant Integrated Modular Motor Drive for Applications with Demanding Reliability Requirements.
Swanke, James A., III.

Fault-Tolerant Integrated Modular Motor Drive for Applications with Demanding Reliability Requirements. - 1 online resource (420 pages)

Source: Dissertations Abstracts International, Volume: 84-07, Section: B.

Thesis (Ph.D.)--The University of Wisconsin - Madison, 2023.

Includes bibliographical references

Permanent magnet synchronous machines (PMSMs) are commonly used in transportation applications due to their high efficiency and low mass. Additional benefits can be achieved by integrating power electronics into the machine to form an integrated motor drive (IMD). The PMSM IMD is a candidate for electric aircraft propulsion applications with elevated reliability requirements compared to typical terrestrial applications.IMD reliability can be improved with the incorporation of fault-tolerant (FT) features into the design. A technique for enhancing a motor drive's fault tolerance is to divide it into redundant three-phase channels, enabling continued operation after multiple faults. Maintaining electromagnetic and thermal isolation between three-phase channels is critical to avoid fault propagation. Combining this modularity with the basic IMD results in an integrated modular motor drive (IMMD). Machine power density, module isolation, performance, and reliability tradeoffs are investigated for IMMDs. A promising IMMD configuration with electromagnetic and thermal isolation characteristics has been proposed and evaluated for a four-module IMMD used in a quadrotor aircraft. To enhance the electromagnetic isolation, cavities are introduced into the stator yoke, and the stator tooth tips have been manipulated to minimize electromagnetic interactions between phases while minimizing the negative impact on the machine's power density. Additionally, direct cooling inside the stator slots and placement of insulation provides thermal isolation between phases. A reliability analysis is completed for the four-module IMMD configuration using Markov chain tools. This analysis addresses the major drive-system components, including healthy and faulted stresses. The importance of repairs and the single-point failure rate in determining the complete IMMD's failure rate are highlighted. The analysis is generalized to consider the IMMD's module count and the number of faulted modules. Figures of merit are established to compare FT topologies based on their improved reliability potential measured against their offsetting penalties.The developed isolation concepts are refined during the design and fabrication of a two-module PMSM. Machine parameters and performance were validated experimentally for healthy and faulted conditions. Test results confirm the effectiveness of the new electromagnetic and thermal isolation features, and the ability of the healthy module to continue delivering its pre-fault torque following a fault.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2024

Mode of access: World Wide Web

ISBN: 9798368469072Subjects--Topical Terms:

596380
Electrical engineering.
Subjects--Index Terms:

Fault toleranceIndex Terms--Genre/Form:

554714
Electronic books.

Fault-Tolerant Integrated Modular Motor Drive for Applications with Demanding Reliability Requirements.
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520 $a Permanent magnet synchronous machines (PMSMs) are commonly used in transportation applications due to their high efficiency and low mass. Additional benefits can be achieved by integrating power electronics into the machine to form an integrated motor drive (IMD). The PMSM IMD is a candidate for electric aircraft propulsion applications with elevated reliability requirements compared to typical terrestrial applications.IMD reliability can be improved with the incorporation of fault-tolerant (FT) features into the design. A technique for enhancing a motor drive's fault tolerance is to divide it into redundant three-phase channels, enabling continued operation after multiple faults. Maintaining electromagnetic and thermal isolation between three-phase channels is critical to avoid fault propagation. Combining this modularity with the basic IMD results in an integrated modular motor drive (IMMD). Machine power density, module isolation, performance, and reliability tradeoffs are investigated for IMMDs. A promising IMMD configuration with electromagnetic and thermal isolation characteristics has been proposed and evaluated for a four-module IMMD used in a quadrotor aircraft. To enhance the electromagnetic isolation, cavities are introduced into the stator yoke, and the stator tooth tips have been manipulated to minimize electromagnetic interactions between phases while minimizing the negative impact on the machine's power density. Additionally, direct cooling inside the stator slots and placement of insulation provides thermal isolation between phases. A reliability analysis is completed for the four-module IMMD configuration using Markov chain tools. This analysis addresses the major drive-system components, including healthy and faulted stresses. The importance of repairs and the single-point failure rate in determining the complete IMMD's failure rate are highlighted. The analysis is generalized to consider the IMMD's module count and the number of faulted modules. Figures of merit are established to compare FT topologies based on their improved reliability potential measured against their offsetting penalties.The developed isolation concepts are refined during the design and fabrication of a two-module PMSM. Machine parameters and performance were validated experimentally for healthy and faulted conditions. Test results confirm the effectiveness of the new electromagnetic and thermal isolation features, and the ability of the healthy module to continue delivering its pre-fault torque following a fault.
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653 $a Markov chains
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