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  Patent History
  • Application
    US 08/427876 1995-04-26
  • Granted
    US 5633791 1997-05-27
  Patent Family

granted patent: Double Modulation Converter

TitleDouble Modulation Converter
Granted PatentUS 5633791
Granted Date1997-05-27
Priority Date1995-04-26 US 08/427876
Inventors
Issue Date1997
Citation
US Patent 5633791. Washington, DC: US Patent and Trademark Office (USPTO), 1997 How to Cite?
AbstractThe Double Modulation Converter (Dmc) Is A Dc-Ac Converter For Driving An Ac-Dc Converter. It Has Two Input Terminals For Connection To A Dc Voltage Source, Two Output Terminals For Connection To An Ac-Dc Converter, And A Plurality Of Circuit Control Terminals For Receiving A Plurality Of Control Waveforms Which Cause A Bipolar Stream Of Width- And Amplitude-Modulated Pulses To Appear At The Output Terminals When A Load Is Connected Across The Output Terminals. The Basic Elements Of The Dmc Are Two Switches Connected In Series Across The Input Terminals. One Output Line Connects An Output Terminal To The Junction Of The Two Switches. The Other Output Line Connects The Other Output Terminal To One Of The Input Terminals. During Operation, The Two Switches Periodically And Alternately Open And Close, The Closure Of One Switch Causing A Pulse Of One Polarity To Appear Across The Output Terminals, And The Closure Of The Other Switch Causing A Pulse Of Opposite Polarity To Appear Across The Output Terminals. A Switch Is Closed Only When A Near-Zero Voltage Exists Across The Switch. In Order To Bring About This Result, A Diode And Capacitor Are Connected In Parallel With Each Switch And An Inductor Is Placed In Output Line. When One Switch Opens, The Other Switch Closes Only When There Is Less Than 0.7 Volts Across The Switch. The Time Period During Which The Voltage Across The Switch To Be Closed Is Less Than 0.7 Volts Is A Function Of The Resonant Frequency Of The Capacitance Associated With The Switch To Be Closed And The Inductance Associated With The Output Lines And The Load To Which The Output Lines Are Connected. One Or More Capacitors Are Placed In One Of The Output Lines To Block Dc. The Resonant Frequency Of The Output-Line Capacitors And Inductor Is At Least A Factor Of Two Less Than The Switching Frequency.
Persistent Identifierhttp://hdl.handle.net/10722/99855
References

 

DC FieldValueLanguage
dc.date.accessioned2010-09-25T18:46:56Z-
dc.date.available2010-09-25T18:46:56Z-
dc.date.issued1997-
dc.identifier.citationUS Patent 5633791. Washington, DC: US Patent and Trademark Office (USPTO), 1997en_HK
dc.identifier.urihttp://hdl.handle.net/10722/99855-
dc.description.abstractThe Double Modulation Converter (Dmc) Is A Dc-Ac Converter For Driving An Ac-Dc Converter. It Has Two Input Terminals For Connection To A Dc Voltage Source, Two Output Terminals For Connection To An Ac-Dc Converter, And A Plurality Of Circuit Control Terminals For Receiving A Plurality Of Control Waveforms Which Cause A Bipolar Stream Of Width- And Amplitude-Modulated Pulses To Appear At The Output Terminals When A Load Is Connected Across The Output Terminals. The Basic Elements Of The Dmc Are Two Switches Connected In Series Across The Input Terminals. One Output Line Connects An Output Terminal To The Junction Of The Two Switches. The Other Output Line Connects The Other Output Terminal To One Of The Input Terminals. During Operation, The Two Switches Periodically And Alternately Open And Close, The Closure Of One Switch Causing A Pulse Of One Polarity To Appear Across The Output Terminals, And The Closure Of The Other Switch Causing A Pulse Of Opposite Polarity To Appear Across The Output Terminals. A Switch Is Closed Only When A Near-Zero Voltage Exists Across The Switch. In Order To Bring About This Result, A Diode And Capacitor Are Connected In Parallel With Each Switch And An Inductor Is Placed In Output Line. When One Switch Opens, The Other Switch Closes Only When There Is Less Than 0.7 Volts Across The Switch. The Time Period During Which The Voltage Across The Switch To Be Closed Is Less Than 0.7 Volts Is A Function Of The Resonant Frequency Of The Capacitance Associated With The Switch To Be Closed And The Inductance Associated With The Output Lines And The Load To Which The Output Lines Are Connected. One Or More Capacitors Are Placed In One Of The Output Lines To Block Dc. The Resonant Frequency Of The Output-Line Capacitors And Inductor Is At Least A Factor Of Two Less Than The Switching Frequency.en_HK
dc.languageengen_HK
dc.relation.isreferencedbyUS 2007236965 (A1) 2007-10-11en_HK
dc.relation.isreferencedbyUS 7606053 (B2) 2009-10-20en_HK
dc.relation.isreferencedbyUS 6084378 (A) 2000-07-04en_HK
dc.relation.isreferencedbyUS 5917720 (A) 1999-06-29en_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License For Public Patent Documents-
dc.titleDouble Modulation Converteren_HK
dc.typePatenten_HK
dc.identifier.emailPong, MH: mhp@eee.hku.hken_HK
dc.identifier.authorityPong, MH=rp00163en_HK
dc.description.naturepublished_or_final_version-
dc.identifier.hkuros37126en_HK
dc.contributor.inventorPoon, NKen_HK
dc.contributor.inventorPong, MHen_HK
patents.identifier.applicationUS 08/427876en_HK
patents.identifier.grantedUS 5633791en_HK
patents.description.assigneePoon, Franki N. K, ; Pong, Bryan M. Hen_HK
patents.description.countryUnited States of Americaen_HK
patents.date.granted1997-05-27en_HK
dc.relation.referencesUS 5229930 (A) 1993-07-20en_HK
dc.relation.referencesUS 5245520 (A) 1993-09-14en_HK
dc.relation.referencesUS 5402329 (A) 1995-03-28en_HK
patents.identifier.hkutechidEEE-1995-00039-1-
patents.date.application1995-04-26en_HK
patents.date.priority1995-04-26 US 08/427876en_HK
patents.description.ccUSen_HK
patents.relation.familyUS 5633791 (A) 1997-05-27en_HK
patents.description.kindAen_HK
patents.typePatent_granteden_HK

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