1# Library to Find Best eBook for Read
Author : Wen Ouyang
Release : 2007
Genre :
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis Modular Permanent Magnet Machine Drive System with Fault Tolerant Capability by : Wen Ouyang
Download or read book Modular Permanent Magnet Machine Drive System with Fault Tolerant Capability written by Wen Ouyang. This book was released on 2007. Available in PDF, EPUB and Kindle. Book excerpt:
Author : James Anthony Swanke
Release : 2023
Genre :
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis Fault-tolerant Integrated Modular Motor Drive for Applications with Demanding Reliability Requirements by : James Anthony Swanke
Download or read book Fault-tolerant Integrated Modular Motor Drive for Applications with Demanding Reliability Requirements written by James Anthony Swanke. This book was released on 2023. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Author : James Anthony Swanke
Release : 2023
Genre :
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis Fault-tolerant Integrated Modular Motor Drive for Applications with Demanding Reliability Requirements by : James Anthony Swanke
Download or read book Fault-tolerant Integrated Modular Motor Drive for Applications with Demanding Reliability Requirements written by James Anthony Swanke. This book was released on 2023. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Author : Igor Bolvashenkov
Release : 2019-07-01
Genre : Technology & Engineering
Kind : eBook
Book Rating : 757/5 ( reviews)
Book Synopsis Fault-Tolerant Traction Electric Drives by : Igor Bolvashenkov
Download or read book Fault-Tolerant Traction Electric Drives written by Igor Bolvashenkov. This book was released on 2019-07-01. Available in PDF, EPUB and Kindle. Book excerpt: This concise book focuses on the reliability of traction electrical drives. The first chapter presents the Lz-transform approach for the comparative analysis of the fault tolerance of multi-motor electrical drives with multi-phase traction motors. The second chapter then provides an estimate of the value of the operational availability and performance of a diesel–electric multi-drive propulsion system, while the third chapter introduces the concept of a more electric aircraft. Lastly, the fourth chapter analyzes the requirements for multi-phase permanent-magnet motors applicable in various aircraft systems.
Author : Jaebum Park
Release : 2015
Genre :
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis Multi-Phase Fault Tolerant PMSM Drive Systems by : Jaebum Park
Download or read book Multi-Phase Fault Tolerant PMSM Drive Systems written by Jaebum Park. This book was released on 2015. Available in PDF, EPUB and Kindle. Book excerpt: The drive to develop electric machines with a wide constant power-speed range (CPSR), high torque capabilities, excellent efficiency, superior reliability, and a reduced environmental footprint for EV traction and ship propulsion systems has led to research interest in various Permanent Magnet Synchronous Motors (PMSM). One particular area of interest is multi-phase fault tolerant PMSM drive systems, which are integral to the development of electric traction systems with all-inclusive motors that include sensors, inverter modules, and a cooling system, much like an automobile engine. Furthermore, these designs simplify fault condition maintenance because their independent single-phase structure allows them to be used with replaceable modular inverter units which have one H-bridge for each phase. In order to provide high reliability for the PMSM drive systems, even in a fault condition, simple but effective current control methods are necessary. An interior PMSM configuration with 5 independent phases is presented for electric vehicle (EV) traction and ship propulsion applications along with the proposed design procedure as well as an associated inverter design and current control methods. The proposed design process is verified using finite element analysis (FEA). An existing 5-phase 15-slot 4-pole Interior PMSM was modified to remove the neutral point, thus allowing for independent control of the 5 phases with 5 H-bridge inverters through a fabricated custom-made control board. Bipolar and unipolar switching methods were evaluated and an effective switching method was proposed to drive the motor. Closed loop speed control was implemented using Step VSI control, SPWM control, and hysteresis control methods. Finally, the 5-phase 10-lead PMSM systems were evaluated under the various control methods using simulated and experimental data after fabricating a new inverter interface board with TI floating point DSP, Delfino (F28335). The results suggest that multi-phase fault tolerant PMSM drive systems could play a key role in the future of EV traction and ship propulsion systems. An interior PMSM configuration with 5 independent phases is presented for electric vehicle (EV) traction and ship propulsion applications along with the proposed design procedure as well as an associated inverter design and current control methods. The proposed design process is verified using finite element analysis (FEA). An existing 5-phase 15-slot 4-pole Interior PMSM was modified to remove the neutral point, thus allowing for independent control of the 5 phases with 5 H-bridge inverters though a fabricated custom-made control board. Bipolar and unipolar switching methods were evaluated and an effective switching method was proposed to drive the motor. Closed loop speed control was implemented using Step VSI control, SPWM control, and hysteresis control methods. Finally, the 5-phase 10-lead PMSM systems were evaluated under the various control methods using simulated and experimental data after fabricating a new inverter interface board with TI floating point DSP, Delfino (F28335). The results suggest that multi-phase fault tolerant PMSM drive systems could play a key role in the future of EV traction and ship propulsion systems. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/155299
