Power Density Limits and Design Trends of High-Speed Permanent Magnet Synchronous Machines

Geest, M. van der; Polinder, H.; Ferreira, J.A.; Christmann, M.

doi:10.1109/tte.2015.2475751

Cited by 69 publications

(30 citation statements)

References 31 publications

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“…The assumptions correspond to state-of-the-art technology levels and are based on a literature review and expert surveys. According to van der Geerst (6) the power density depends on the surface speed or rotational frequency of the electric motor. In each concept, the power density will be adapted to the appropriate level of rotational speed.…”

Section: Approachmentioning

confidence: 99%

System analysis of turbo-electric and hybrid-electric propulsion systems on a regional aircraft

2019

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The increasing environmental requirements in the air transport sector pose great challenges to the aviation industry and are key drivers for innovation. Besides various approaches for increasing the efficiency of conventional gas turbine engines, electric propulsion systems have moved into the focus of aviation research. The first electric concepts are already in service in general aviation. This study analyses the potentials of electric and turbo hybrid propulsion systems for commercial aviation. Its purpose is to compare various architectures of electrical powertrains with a conventional turboprop on a regional aircraft, similar to the ATR 72, on engine and flight mission levels. The considered architectures include a turbo-electric (power controlled and direct driven), hybrid-electric (serial and parallel) and a pure electric concept. Their system weights are determined using today’s technology assumptions. With the help of performance models and flight mission calculations the impact on fuel consumption, CO ${}_{2}$ emissions and aircraft performance is evaluated.

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Section: Approachmentioning

confidence: 99%

System analysis of turbo-electric and hybrid-electric propulsion systems on a regional aircraft

2019

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“…A high SP machine gets advantages from high numbers of pole counts, rotational speed, and shear stress. Nonetheless, the SP in machine exhibits a declining trend with the increase in machine power, due to the design limitations [201][202][203]. Several machine types have been investigated while considering their design suitability for the aircraft operational environment.…”

Section: Electrical Machinementioning

confidence: 99%

“…Several machine types have been investigated while considering their design suitability for the aircraft operational environment. The permanent magnet synchronous machines (PMSM) [105,184,[203][204][205], WFSM [11], synchronous reluctance machines (SRM), brushless doubly-fed machines (BDFM) [204], and induction machines (IM) [184,202] are some of the machine types which are separately suited for specific requirements. The suitability and unsuitability of different motors are summarized in Table 4.…”

Section: Electrical Machinementioning

confidence: 99%

A Review of Concepts, Benefits, and Challenges for Future Electrical Propulsion-Based Aircraft

2020

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Electrification of the propulsion system has opened the door to a new paradigm of propulsion system configurations and novel aircraft designs, which was never envisioned before. Despite lofty promises, the concept must overcome the design and sizing challenges to make it realizable. A suitable modeling framework is desired in order to explore the design space at the conceptual level. A greater investment in enabling technologies, and infrastructural developments, is expected to facilitate its successful application in the market. In this review paper, several scholarly articles were surveyed to get an insight into the current landscape of research endeavors and the formulated derivations related to electric aircraft developments. The barriers and the needed future technological development paths are discussed. The paper also includes detailed assessments of the implications and other needs pertaining to future technology, regulation, certification, and infrastructure developments, in order to make the next generation electric aircraft operation commercially worthy.

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“…The peripheral speed of the rotor is moderately high (v rot ≈ 90 m s −1 ) due to the large size (D rot ≈ 0.4 m), wherefore the high power density can be attributed mainly to a high electromagnetic and thermal utilization of materials. This also reflects in a high current density in the stator (J e f f = 17.5 A mm −2 ), a value which is challenging but not impossible with state-of-the-art cooling techniques [41].…”

Section: Electric Machinementioning

confidence: 99%

Predesign Considerations for the DC Link Voltage Level of the CENTRELINE Fuselage Fan Drive Unit

et al. 2019

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Electric propulsion (EP) systems offer considerably more degrees of freedom (DOFs) within the design process of aircraft compared to conventional aircraft engines. This requires large, computationally expensive design space explorations (DSE) with coupled models of the single components to incorporate interdependencies during optimization. The purpose of this paper is to exemplarily study these interdependencies of system key performance parameters (KPIs), e.g., system mass and efficiency, for a varying DC link voltage level of the power transmission system considering the example of the propulsion system of the CENTRELINE project, including an electric motor, a DC/AC inverter, and the DC power transmission cables. Each component is described by a physically derived, analytical model linking specific subdomains, e.g., electromagnetics, structural mechanics and thermal analysis, which are used for a coupled system model. This approach strongly enhances model accuracy and simultaneously keeps the computational effort at a low level. The results of the DSE reveal that the system KPIs improve for higher DC link voltage despite slightly inferior performance of motor and inverter as the mass of the DC power transmission cable has a major share for a an aircraft of the size as in the CENTRELINE project. Modeling of further components and implementation of optimization strategies will be part of future work.

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Power Density Limits and Design Trends of High-Speed Permanent Magnet Synchronous Machines

Cited by 69 publications

References 31 publications

System analysis of turbo-electric and hybrid-electric propulsion systems on a regional aircraft

System analysis of turbo-electric and hybrid-electric propulsion systems on a regional aircraft

A Review of Concepts, Benefits, and Challenges for Future Electrical Propulsion-Based Aircraft

Predesign Considerations for the DC Link Voltage Level of the CENTRELINE Fuselage Fan Drive Unit

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