The Vacuum-Insulated, Varying-Capacitance Machine

“…The application of voltage to a set of pegs results in torque acting to minimize the elastance between the pegs that the voltage was applied to. The 2 nd and 4 th rows (B, yellow) are skewed by 180 electrical degrees (3.75 mechanical degrees) from the A rows in order to eliminate half cycle freewheeling operation in DC generator applications such as [5], [6].…”

Section: Single Phase 48 Pole Axial Peg Machine Geometrymentioning

confidence: 99%

“…plastic injection molding, 3D printing, etc. These concepts, in part, have prompted the investigation of electric field machinery at MEMS [3], [4] and utility scales [5], [6], given the significant materials and manufacturing advantages. This paper aims to establish electrostatic machinery at the macro scale, by investigating elastance mode operation at the fractional to integer hp level.…”

Section: Introductionmentioning

confidence: 99%

A 1-phase 48-pole axial peg style electrostatic rotating machine utilizing variable elastance

Ludois

2015

2015 IEEE International Electric Machines &Amp; Drives Conference (IEMDC)

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Starting from the duality of magnetic reluctance and electric elastance, this paper discusses design features of an axial peg style electrostatic rotating machine. Axial peg style refers to the geometry of the machine. Interdigitated pegs (cylinders) come into, and out of, radial alignment as the machine rotates causing variable capacitance between the stator and rotor. A prototype with peak torque of 0.9 N-m and gap field strength of 14 kV/mm was constructed. The specific torque density of the machine is 0.126 N-m/kg, comparable to fractional horsepower NEMA class induction machines. This was achieved by filling the machine with a dielectric fluid whose relative permittivity is 7.1, rather than ultra-high vacuum typically employed in canonical macro scale electrostatic machine designs. Selected experimental measurements presented include angular capacitance, stall torque, average torque and losses under stall conditions.

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“…When number of poles is increased, it increases the speed of capacitance variation. As a result, number of harvesting times per cycle increases [5], [8].…”

Section: A the Variable Capacitormentioning

confidence: 99%

Modeling of Low Power Electrostatic Wind EnergyHarvester for Macro-Scale Applications

Abdulmunam¹

2012

IJIEE

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The aim of this paper is to investigate the performance of a new macro scale electrostatic harvester model linked to a micro wind turbine. The harvester consists of a multi-poles rotary capacitor and a converter circuit. First, the model of the harvester is implemented in Matlab/Simulink. Next, the validated model device parameters such as the passive elements and the battery capacitance are varied to extract the optimal harvested power. Results indicate that maximum harvested power is 4.76 mW at a wind speed of 10 m/s with harvested energy of 219 µJ per cycle.

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The Vacuum-Insulated, Varying-Capacitance Machine

Cited by 31 publications

References 1 publication

Electrostatic Energy Harvesting Systems: A Better Understanding of Their SustainabilityElectrostatic Energy Harvesting Systems: A Better Understanding of Their Sustainability

Electrostatic Energy Harvesting Systems: A Better Understanding of Their SustainabilityElectrostatic Energy Harvesting Systems: A Better Understanding of Their Sustainability

A 1-phase 48-pole axial peg style electrostatic rotating machine utilizing variable elastance

Modeling of Low Power Electrostatic Wind EnergyHarvester for Macro-Scale Applications

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