Active Output Voltage Regulation for an Ironless Axial-Flux PM Automotive Alternator With Electromechanical Flux Weakening

Capponi, Fabio Giulii; Terrigi, R.; Caricchi, F.; Ferraro, L. Del

doi:10.1109/tia.2009.2027552

Cited by 55 publications

(18 citation statements)

References 9 publications

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“…Table V summarizes the currents and wound excitation flux linkage required for this strategy. interesting to note that these are only a function of L s,pu , since it is possible to demonstrate that δ b = 3ϕ rated and ϕ rated is a function of L s,pu according to (10). Figs.…”

Section: E Combined Stator and Rotor Flux Weakening Leading Power Fmentioning

confidence: 94%

“…To this end, a mechanical device can be used to change the stator flux linkage as the speed increases. Significant examples have been proposed for axial flux PM machines in [10] and [11], demonstrating flux linkage regulation with either passive devices located on the rotor or active ones on the stator. Both examples use a phase shifting technique that doesn't change the magnetic energy stored in the air-gap and therefore requires negligible power.…”

mentioning

confidence: 99%

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Flux Regulation Strategies for Hybrid Excitation Synchronous Machines

Capponi¹,

Borocci

Donato³

et al. 2015

IEEE Trans. on Ind. Applicat.

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This paper investigates methods to achieve a wide\ud constant power speed range (CPSR) in electric drives using hybrid\ud excitation synchronous machines; five strategies are presented\ud and compared. These range from state-of-the-art flux weakening\ud based on demagnetizing armature current injection, to algorithms\ud based on wound excitation (WE) current regulation, all the way to\ud techniques involving both armature and WE current regulation.\ud It is shown that one of these latter strategies allows a theoretically\ud infinite CPSR and unity power factor operation throughout.\ud This result is also verified experimentally, and a 10:1 range is\ud demonstrated. Finally, a discussion is presented on practical limiting\ud issues such as harmonic flux linkage components, inductance\ud variations, and high-speed iron losses

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Section: E Combined Stator and Rotor Flux Weakening Leading Power Fmentioning

confidence: 94%

mentioning

confidence: 99%

Flux Regulation Strategies for Hybrid Excitation Synchronous Machines

Capponi¹,

Borocci

Donato³

et al. 2015

IEEE Trans. on Ind. Applicat.

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show abstract

“…In [16], two different mechanical solutions for an axial field PM (AFPM) machine were proposed and compared, both of which are capable of weakening the flux linkage. The active output voltage regulation characteristic was then analyzed in [17] for the same AFPM machine. In [19], the authors proposed an IPMSM with adjustable PM armature flux linkage by adapting flux-shortening iron plates at both sides of the rotor, and hence, a wider constant-power range was realized.…”

Section: Introductionmentioning

confidence: 99%

Flux-Weakening Control Performance of Partitioned Stator-Switched Flux PM Machines

Evans

Zhan

et al. 2016

IEEE Trans. on Ind. Applicat.

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This paper firstly investigates the flux-weakening control performance of two types of partitioned stator switched flux permanent magnet (PM) (PS-SFPM) machines and then proposes a novel mechanical flux-weakening technique. The PS-SFPM machine topologies, operation principles and flux-weakening control method are described. In addition, it is shown that by mechanically varying the relative position of two stators of the PS-SFPM machine, the PM flux-linkage can also be varied and hence it can provide improvement of the speed range and torque capability. The optimal relative mechanical angle is derived to enable the maximum torque capability and reduce or even avoid the flux-weakening current injected by the inverter. The proposed technique is verified by 3-dimensional (3D) finite element (FE) analyses and experiments on the prototype machines. Index Terms-Brushless machines, flux weakening, mechanical flux-weakening, partitioned stator, switched flux, variable flux.

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“…Furthermore, in the axial flux surface-mounted PM machines proposed in [9] and [10], the PM flux-linkage is adjusted by the relative movement of two rotor plates or windings. Using the same concept, the radial flux surface-mounted PM machines can also be modified to be capable of adjusting the PM flux linkage by dividing the rotor into two separated parts [11].…”

Section: Introductionmentioning

confidence: 99%

A Mechanical Flux Weakening Method for Switched Flux Permanent Magnet Machines

Zhu

Al-Ani

Liu

et al. 2015

IEEE Trans. Energy Convers.

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Several switched flux permanent magnet (SFPM) machines with mechanically movable flux adjusting technique are proposed, analyzed, and compared for applications which demand high speed and efficiency. By using ferromagnetic pieces-one per every stator pole or every alternative stator pole, which are named as flux adjusters (FAs) and located on the outside surface of the stator-the airgap flux density can be weakened and therefore the operation speed range and flux weakening capability can be improved. The influence of using all or alternative FAs on the open circuit results, electromagnetic performance, and torque-speed characteristics of the SFPM machine is investigated through three SFPM machines with different stator/rotor pole combinations, i.e., 12/10, 12/13, and 12/14. Moreover, although using FAs in all stator poles can significantly improve the flux weakening capability, alternative FAs can also achieve remarkable improvement although higher torque ripple is observed. Additionally, it has been found that the 12/13 combination is considered to be the most suitable candidate for alternative FAs technique. In addition to 2-D finiteelement analysis (FEA) and analytical methods, 3-D FEA results accounting for the end-effect are presented. Furthermore, experiments are performed to validate the results. Index Terms-Fluxweakening, mechanical flux adjusters (FAs), switched flux, variable flux. Locomotive Group (CSR). His current major research interests include the design and control of permanent-magnet brushless machines and drives for applications ranging from automotive to renewable energy. M. M. J. Al-Ani received the B.Eng. degree in electronic and electrical engineering from the University of Sheffield, Sheffield, U.K., in 2010, where he is currently working toward the Ph.D. degree from the Electrical Machines and Drives Research Group. His research interests include brushless permanent magnet machines for high speed applications, electrical and hybrid vehicles, and vehicles electrification. X. Liu (M'13) received the B.Eng. and Ph.D. degrees in electrical engineering

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Active Output Voltage Regulation for an Ironless Axial-Flux PM Automotive Alternator With Electromechanical Flux Weakening

Cited by 55 publications

References 9 publications

Flux Regulation Strategies for Hybrid Excitation Synchronous Machines

Flux Regulation Strategies for Hybrid Excitation Synchronous Machines

Flux-Weakening Control Performance of Partitioned Stator-Switched Flux PM Machines

A Mechanical Flux Weakening Method for Switched Flux Permanent Magnet Machines

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