›› 2016, Vol. 36 ›› Issue (4): 81-.doi: 10.16708/j.cnki.1000-758X.2016.0041

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Modelinganalysisofslowstartupcircuitsofspacecooling

LI  Wen-Ran   

  1. ChinaWaterborneTransportResearchInstitute,Beijing100088,China
  • Received:2015-09-01 Revised:2016-03-14 Online:2016-08-25 Published:2016-05-11

Abstract: Withmorepowerfulspacestirlingcoolercomingout,ifthecontrollerstillusestraditionalslowstartupandLCenergystorageandfilteringseriescircuits,anunstableandlargeovershootstartupcurrentwillbecaused,whichleadstothecontrollerovercurrentprotectionandpotentialsurgedamagestosatellitepowerandotherdevices.Undertheconditionofnotaddingcomponents,aslowstartupcircuitconnectingLCenergystorageandfilteringcircuitcooperativewaywithstartupcurrentfeedbackfunctionwasproposed.Firstly,thenewandoldcooperativecircuitswithlowfrequencyequivalentmodelofnonlinearMOSFETweremodeled.Secondly,themodelsbothintheconditionofsmallinductanceandsmallcapacitanceandintheconditionoflargeinductanceandlargecapacitanceweresimplifiedandanalyzed.Intheconditionofsmallinductanceandsmallcapacitance,bothcooperativecircuitscanbesimplifiedtononovershotfirstordersystem.Intheconditionoflargeinductanceandlargecapacitance,thetraditionalcooperativecircuitswassimplifiedtosecondordersystemwithoscillationcharacteristics.However,thenewcooperativecircuitsisstillfirstordersystem,whichsatisfiestherequirementsofnonovershootstartupcurrentintheconditionoflargeinductanceandlargecapacitance.Finally,thesimulationcontrastiveanalysisandexperimentalverificationwasusedtoproofthenewcooperativecircuitsrationalityandeffectiveness.Thetestshowsthestartupcurrentstableandnoovershootandthepeakofthestartupcurrentisrestraineduptoabout50%.

Key words: slowstartupcircuit, LCenergystorageandfilteringcircuit, bootstrapcapacitor, startupcurrentfluctuation, ripplecurrentsuppression, power, satellite