This citation summarizes a one-page announcement of technology available for utilization. While the single-phase 'boost chopper' is already superior to most conventional battery chargers for electric vehicles, a proposed poly-phase version is expected to give even better performance. Calculations show that when the number of choppers is increased to two, three, or more, ripple and electromagnetic interference (EMI) are substantially reduced and efficiency is improved. The basic advantages of the boost chopper--compactness, high efficiency, and power factors approaching unity--are retained. ...FOR ADDITIONAL INFORMATION: Inquiries concerning rights for the commercial use of this invention should be addressed to the Patent Counsel, NASA Resident Office JPL. Jet Propulsion Laboratory, Pasadena, CA. Refer to NPO-14964.


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    Title :

    Improved Battery Charger for Electric Vehicles: Polyphase chopper circuit would significantly reduce ripple and EMI


    Publication date :

    1981


    Size :

    1 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





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