Comparison and choice of a fault tolerant inverter topology for the traction drive of an electrical helicopter

Bolvashenkov, Igor; Kammermann, Jörg; Lahlou, Taha; Herzog, Hans-Georg

doi:10.1109/esars-itec.2016.7841328

Cited by 19 publications

(3 citation statements)

References 22 publications

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“…the number of modules used. The authors of [4] compared a CHB to a conventional B6-bridge in an electric helicopter and found a significantly smaller power ripple in the CHB topology during a single phase failure, as well as better fault tolerance, especially for multi-phase machines.…”

Section: Considered Inverter Technologiesmentioning

confidence: 99%

“…As previously mentioned, these can run each-phase independently or in groups of IC-MSQUARE-2023 Journal of Physics: Conference Series 2701 (2024) 012130 three, acting as a multiple of a three-phase machine. Different inverter topologies of multi-phase machines are discussed in [12,15,4,31]. The authors of [28] proposed a methodology for defining the states of a multi-phase machine as a Markov process.…”

Section: Fault-tolerant Electric Motorsmentioning

confidence: 99%

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Comparative reliability analysis of electric aircraft versions for NASA’s X-57 based on Lz-transform method

Gejo,

Kammermann,

Bolvashenkov

et al. 2024

J. Phys.: Conf. Ser.

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As the goals of air transport shift towards more-electric or all-electric airplanes, different drive train configurations have been explored recently. A major goal on the way towards the inclusion in commercial air traffic is high reliability. One of the experimental electric airplanes is NASA’s X-57 “Maxwell”, which consists of fourteen electric motors powered from a battery pack. The aim of this paper is to assess the reliability of the proposed design of the X-57 by using the Lz-transform approach, as well as to propose several alternative designs to its electric drive train, in order to use less vehicle mass on the motors and more on the battery pack, without sacrificing the original availability and expected performance, with a final goal to increase the flight range. The reliability analyses show that the replacement of X-57’s three-phase motors with six-phase ones greatly improves availability of the electric drive train due to the use of fault-tolerant electric machines. Additionally, all of the further proposed alternative designs have higher availability than the X-57. The alternatives with CHB inverter topologies generally achieved higher availability values and higher expected performance than the B6 variants. Finally, the use of a distributed propulsion system with smaller take-off motors leads to a motor-mass advantage compared to more conventional drive train designs.

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Section: Considered Inverter Technologiesmentioning

confidence: 99%

Section: Fault-tolerant Electric Motorsmentioning

confidence: 99%

Comparative reliability analysis of electric aircraft versions for NASA’s X-57 based on Lz-transform method

Gejo,

Kammermann,

Bolvashenkov

et al. 2024

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…The papers [1,2] show that only multi-phase electric motors are capable to satisfy the requirements to the fault tolerance (λ ≤ 10 −9 /h), set up for the electric traction drive of the helicopter.…”

Section: Introductionmentioning

confidence: 99%

Fault Tolerant Inverter Topology for the Sustainable Drive of an Electrical Helicopter

Bolvashenkov¹,

Kammermann²,

Lahlou³

et al. 2017

Adv. sci. technol. eng. syst. j.

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Design and Feasibility of Electrical Version of Search-and-Rescue Helicopter Based on Eurocopter

Bolvashenkov

Kammermann

Rubinraut³

et al. 2021

SpringerBriefs in Applied Sciences and Technology

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Comparison and choice of a fault tolerant inverter topology for the traction drive of an electrical helicopter

Cited by 19 publications

References 22 publications

Comparative reliability analysis of electric aircraft versions for NASA’s X-57 based on Lz-transform method

Comparative reliability analysis of electric aircraft versions for NASA’s X-57 based on Lz-transform method

Fault Tolerant Inverter Topology for the Sustainable Drive of an Electrical Helicopter

Design and Feasibility of Electrical Version of Search-and-Rescue Helicopter Based on Eurocopter

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