Aerospace Electric Generator Design Considerations

Reinap, Avo

doi:10.1109/edpc48408.2019.9011859

Cited by 2 publications

(4 citation statements)

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“…As there is 2 stator and 2 rotor topologies of interest there is 4 PMSM machines in total under the design development. In addition to the performance estimation provided in this work, the detailed investigation is carried out in [42] while this article focuses on more general aspects on machine topology selection and specification.…”

Section: Permanent Magnet Machinesmentioning

confidence: 99%

“…The design space comparison is shown for the PMSM type that has a high amount of PM material and a high winding factor that expectedly is able to generate most power for given size compared to other topologies [42]. However, the machine has distributed windings that are not categorised as faultless due to overlaps, even if the machine can provide constant power over wide CPSR it has larger SC and generates more heat in the end turns.…”

Section: Investigations On Design Specificationsmentioning

confidence: 99%

“…Cooling integration, which is based on hollow conductors (Figure 13), is studied in [42] where distributed winding with cooling jacket is compared to a concentrated winding machine where the individual coils are connected to corresponding PEC and cooling terminal. Apparently, the concentrated winding machine provides topology with more modular concept that it is easier to produce and assemble; however the serious drawback of this machine is the ripple.…”

Section: Figure 13 Detail View Of Ipmsm With Direct Cooled Windingmentioning

confidence: 99%

“…Four different machine topologies are investigated in [42] where CPSR capability is achieved by larger air-gap, which is also needed for a retaining sleeve in the rotor (Figure 3 1) or rotor magnetic saliency (Figure 3 3). The concentrated winding machine (Figure 3 3) have narrower air-gap that contributes to higher efficiency but also considerably higher torque ripple.…”

Section: Sensitivity Study On Selected Designmentioning

confidence: 99%

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Aerospace Electric Generator Specification and Selection - Opportunities and Challenges

Reinap¹

2019

Proceedings of the 10th Aerospace Technology Congress, October 8-9, 2019, Stockholm, Sweden

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The goal of this work is to specify and investigate suitability of a number of selected permanent magnet synchronous machine (PMSM) topologies to be mounted directly on a low pressure shaft (LPS) of a geared turbofan engine. The starting point of the work is to explore the status of electrical machines for more electric engine in order to study different design aspects when identifying and defining the designs. Even though the high flexibility and power density is anticipated from the system electrification the reliability is one of the most important aspects for the machine topology development and faultlessness can compromise desired performance. Large inner diameter of LPS and wide speed range are challenging the selection and specification of PMSM. The design initialisation is carried out by looking for more fault tolerant arrangements between machine windings and power converter topologies and appropriate rotor layouts that can provide excitation and constructional stability. Design space exploration is carried out on surface mounted Halbach array PMSM with distributed winding in the stator as one of the machine types that is best suited for high power density and high-speed application. Machine design aspects on modular design for faultlessness and cooling integration for enhanced thermal management and higher power density are the arguments behind the sensitivity study carried out on interior permanent magnet synchronous machine with nonoverlapping concentrated winding. Six different magnetic core materials are compared to demonstrate that thin FeSi electromagnetic steel grades improve efficiency and FeCo materials mainly torque density but the machine may remain unsatisfactory in power and efficiency.

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Section: Permanent Magnet Machinesmentioning

confidence: 99%

Section: Investigations On Design Specificationsmentioning

confidence: 99%

Section: Figure 13 Detail View Of Ipmsm With Direct Cooled Windingmentioning

confidence: 99%

Section: Sensitivity Study On Selected Designmentioning

confidence: 99%

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