Design and Analysis of Hybrid Excitation Generators for Aircraft Applications Under Limiting Open-Circuit Voltage

Sun, Linnan; Zhang, Zhuoran; Yu, Liangyao; Gu, Xiangpei; Vansompel, Hendrik; Sergeant, Peter

doi:10.1109/tte.2021.3096030

Cited by 6 publications

(5 citation statements)

References 22 publications

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“…It is worth noting, that in real-world failure scenarios, halting heat generation may not be an option; however, the implementation of thermal management strategies is feasible. [64][65][66] The deactivation of the heating element had the intentional effect of cooling the pack by convectively transferring heat to cooler surroundings, which in this case was simple ambient air. This operational modification served as a proxy for simulating either active or passive thermal management strategies, thereby providing insights into the efficacy of such interventions within an industrial setting.…”

Section: T T R Smentioning

confidence: 99%

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Early Detection of Li-Ion Battery Thermal Runaway Using Commercial Diagnostic Technologies

Torres-Castro,

Bates,

Johnson

et al. 2024

J. Electrochem. Soc.

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The rate of electric vehicle (EV) adoption, powered by the Li-ion battery, has grown exponentially. This is largely driven by technological advancements, consumer demand, and global initiatives to reduce carbon emissions. As a result, it is imperative to understand the state of stability (SoS) of the cells inside an EV battery pack. That understanding will enable the warning of or prevention against catastrophic failures that can lead to serious injury or even loss of life. The present work explores rapid electrochemical impedance spectroscopy (EIS) coupled with gas sensing technology as diagnostics to monitor cells and packs for failure markers. These failure markers can then be used for onboard assessment of SoS. Experimental results explore key changes in single cells and packs undergoing thermal or electrical abuse. Rapid EIS showed longer warning times, followed by VOC sensors, and then H2 sensors. While rapid EIS gives the longest warning time, with the failure marker often appearing before the cell vents, the reliability of identifying impedance changes in single cells within a pack decreases as the pack complexity increases. This provides empirical evidence to support the significant role that cell packaging and battery engineering intricacies play in monitoring the SoS.

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Section: T T R Smentioning

confidence: 99%

“…By taking these actions, the BMS would be actively working to reduce the likelihood or severity of thermal runaway, thus enhancing the overall safety and reliability of the battery system. 6,64 This experiment simulated the process of identifying a failure marker and subsequently shutting down the system.…”

Section: T T R Smentioning

confidence: 99%

Early Detection of Li-Ion Battery Thermal Runaway Using Commercial Diagnostic Technologies

Torres-Castro,

Bates,

Johnson

et al. 2024

J. Electrochem. Soc.

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“…The benefits of producing and consuming reactive power have been mentioned by several authors [30,47]. The benefits of local power generation have been addressed by Kamiev et al [25] for marine ships and by Sun et al [48] for generators in aircrafts.…”

Section: Advantage Of Variable Flux In Hybrid Excitationmentioning

confidence: 99%

“…Another alternative would be to combine the PM excitation with a reluctance machine section, such as the designs studied by Chalmers et al [100], or to combine a PM-based part with an iron rotor part, such as the design studied by Sun et al [48,101], Gu et al [102,103], Geng et al [104], and Li et al [105].…”

Section: Field Winding Part Of Rotor Pm Part Of Rotor Statormentioning

confidence: 99%

Overview of Hybrid Excitation in Electrical Machines

Mörée

Leijon

2022

Energies

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Hybrid excitation is a technology that combines the advantages of field windings and permanent magnets for inducing magnetic flux. This article studies the benefits of hybrid excitation and provides an outlook on their possible applications, such as wind power generators and electric vehicle motors. Compared to permanent magnet-based machines, hybrid excitation gives a variable flux while still using the advantage of the permanent magnets for a portion of the flux. This article also looks into some different categories of machines developed for hybrid excitation. The categories are based on the reluctance circuit, the relative geometrical location of the field windings relative to the permanent magnets, or the placement of the excitation system.

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“…The generator is the key technology to realize greater electric aircraft performance [1][2][3]. Currently, helicopter motors are developing towards high-power density and high efficiency [4]. On the premise of ensuring the output capacity and reliability of the helicopter motor, the realization of a lightweight design and the reduction of the motor volume are issues that need to be further studied.…”

Section: Introductionmentioning

confidence: 99%

Lightweight Design of an Asymmetrical Generator Based on Topology Optimization for Helicopter

et al. 2022

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This paper proposes a new alternating stage permanent magnet synchronous generator (ASPMSG) that is suitable for helicopter motor applications. The machine topology and the working principle of the ASPMSG are first introduced. The slot-pole matching of the motor is studied according to the application environment and requirements of the motor. In addition, the main structural parameters of the motor, such as the maximum EMF (electromotive force) and the minimum harmonic, are optimized. Finally, the topology optimization method is used to design the lightweight motor, and the optimized mass of the optimized area reaches 68.29% while the output of the ASPMSG is almost unaffected. The simulation results show that the proposed ASPMSG topology has higher power density under the conditions satisfying the application requirements of helicopter motors.

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Design and Analysis of Hybrid Excitation Generators for Aircraft Applications Under Limiting Open-Circuit Voltage

Cited by 6 publications

References 22 publications

Early Detection of Li-Ion Battery Thermal Runaway Using Commercial Diagnostic Technologies

Early Detection of Li-Ion Battery Thermal Runaway Using Commercial Diagnostic Technologies

Overview of Hybrid Excitation in Electrical Machines

Lightweight Design of an Asymmetrical Generator Based on Topology Optimization for Helicopter

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