Development of a Novel Power Processing Unit for Hall Thrusters

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1、158IEEETRANSACTIONSONPLASMASCIENCE,VOL.43,NO.1,JANUARY2015DevelopmentofaNovelPowerProcessingUnitforHallThrustersNaojiYamamoto,HarukiTakegahara,JunichiroAoyagi,KyoichiKuriki,TaichiroTamida,andHiroyukiOsuga,Member,IEEEAbstractAnewlydevelopedpowerprocessingunit(PPU)offersth

2、eadvantagesofsmallersizeandlighterweightthanconventionalPPUs.ThethrustperformanceofamagneticlayertypeHallthrusterdevelopedatKyushuUniversitywiththisnewPPUwasinvestigated;itshowedagoodperformanceascomparedwithconventionalpowersupplies.Thethrusttopowerratiowasimprovedto58m

3、N/kWatdischargevoltageof150Vandanodexenonmassflowrateof1.0mg/s.IndexTermsAerospace,Hallthruster,oscillationcontrol,plasma,powerprocessingunit(PPU).Fig.1.MagneticlayertypeHallthrusterdevelopedatKyushuUniversity.I.INTRODUCTIONIGHpowerelectricpropulsionsystemswillbeintheHpra

4、cticalapplicationphaseinthenearfuture.TheywillbutharmonizedwiththeHallthrusters.IntheHallthruster,beusedasthemainpropulsionsystemofthecargoforadischargecurrentnaturallyoscillates,duetothevariouspotentialmannedmissiontoMars[1],[2],aswellasfortheinstabilities,withthelarges

5、toscillationbeingprey-predatorconstructionofheavyspacestructureslikeaspacesolarpoweroscillation(ionizationoscillation)[9][16].Stabilityshouldsystem[3],[4].Therearemanycandidatesforhighpowerthereforebedefinedinthiscasenotasoscillationsuppressedelectricpropulsion;Hallthrust

6、ers[5][7]offeranattractivebutasdischargemaintained,withthePPUallowingnaturalcombinationofhighthrustefficiency,exceeding50%,withdischargeoscillation.TheharmonizedPPUprovidespowerinaspecificimpulserangeof10003000s,ahigherionbeamaccordancewiththefluctuating(overtime)impedanceo

7、fthedensitythanionthrustersandalargerexpectedtotalimpulse.Hallthrusters.Thatis,itworksasaconstantvoltagesourceInaddition,inthenearfuture,Hallthrusterswillbeamainformaintainingdischargewhenthedischargecurrentissmall,propulsionsystemforsuperloworbitsatellites.Forthisappli-

8、anditworksasaconstantcurrentsourceduringlargepulsedcation,theywillberequiredtobeassmallaspossible,becau