Notes on the design of multipolar dynamos

Esson, W.B.

doi:10.1049/jiee-1.1891.0010

Cited by 14 publications

(3 citation statements)

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“…From a torque density and efficiency perspective, it is prudent to compare the machines at hand and select a candidate that provides the best development platform. Recently, Lipo and Liu [41] Lipo et al [42] did one such comparison, wherein the canonical magnetic machine topologies were analyzed based on torque production capability (accounting for machine type and losses) normalized to an "ideal" machine from Esson's rule [43]. Using these criteria, the rank of canonical magnetic machine types is given as follows:…”

Section: A Argument For Separately Excited Synchronous Machines At Th...mentioning

confidence: 99%

Macroscale Electrostatic Rotating Machines and Drives: A Review and Multiplicative Gain Performance Strategy

Ludois

Frankforter

Ge³

et al. 2022

IEEE J. Emerg. Sel. Topics Power Electron.

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The development of electrostatic rotating machines for macroscale power conversion has been largely sidestepped, given the uncertainty of its capabilities and place in the technological hierarchy. This article reviews prior and present works in macroscale electrostatic rotating machinery and identifies the relevant machine types, their limitations, and strategies for performance improvement. The separately excited synchronous electrostatic machine presents the greatest opportunity for competitive macroscale category-two machinery, and a strategy of multiplicative gains is established. The strategy spans machine modeling, optimization, gap media (gases, liquids, and vacuum), gap maintenance, advanced manufacturing techniques, and power electronic drives/control. Ultimately, the product of innovation gains across all these areas reveals that macroscale electrostatic machinery is possible and potentially competitive with magnetic machinery for specific areas, including position and hold, low-speed direct drive, and high-voltage utility generation applications.

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Section: A Argument For Separately Excited Synchronous Machines At Th...mentioning

confidence: 99%

Macroscale Electrostatic Rotating Machines and Drives: A Review and Multiplicative Gain Performance Strategy

Ludois

Frankforter

Ge³

et al. 2022

IEEE J. Emerg. Sel. Topics Power Electron.

View full text Add to dashboard Cite

show abstract

“…When the air gap g r or ≈ r is , these transfer coefficients are equivalent to the hyperbolic functions sinh, cosh used in rectangular coordinates, which are presented in an earlier work [4] for WFSMs. Similarly, in region II, we end up with a slightly complicated formula (4) shown at bottom of this page, due to the present of PMs By equating B or r in ( 3) and ( 4), the magnetic potential at r = r or can be resolved as in (5) shown at bottom of this page, where the hatted version of function g m is defined as g m (x, y) = (x/y)g m (x, y).…”

Section: Transfer Relation Between Flux Density and Field Strengthmentioning

confidence: 99%

“…Torque is resulted from the conversion between air gap energy and mechanical energy. Essen's rule depicts this and expresses the torque production as a function of key gap parameters including surface area, axial length, peagk gap flux density, peak surface current density, gap efficiency, and power factor [5]. Honsinger incorporated the stator back iron and developed the so-called D 3 L and D 2.5 L sizing formula, where D is the stator outer diameter [6].…”

Section: Introductionmentioning

confidence: 99%