Energy harvesting from an exercise bike using a switch-mode converter controlled generator

Arnold Knott, Kristian Lindberg-Poulsen, Thomas Andersen, Michael A. E. Andersen

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    Abstract

    This paper investigates the feasibility of using an alternator as means of harvesting energy from a stationary exercise bicycle. A switch mode converter was designed to regulate the current in the alternator rotor winding, thus regulating the power required to pedal, and consequently the power output of the bike. The complete controller design consists of this power stage, a control circuit, a startup circuit and an overvoltage protection circuit. A functional overview of the entire controller is presented in the paper, along with in-depth descriptions of the specific subcircuits designed. The system is self-starting and does not require an external power source. There are two modes of operation: Voltage regulated 12V output for connection to a standard inverter, and unregulated output for charging of a 24V battery, with direct linear control of the rotor current, thus simulating road bike gearing. Prototype bikes were built and used at several events, and the functionality was experimentally verified.
    Original languageEnglish
    Title of host publicationThe Second IEEE International Conference on Sustainable Energy Technologies
    Place of PublicationKandy, Sri Lanka
    Publication date2010
    ISBN (Print)978-1-4244-7191-1
    DOIs
    Publication statusPublished - 2010
    Event2nd IEEE International Conference on Sustainable Energy Technologies - Kandy, Sri Lanka
    Duration: 6 Dec 20109 Dec 2010
    Conference number: 2

    Conference

    Conference2nd IEEE International Conference on Sustainable Energy Technologies
    Number2
    Country/TerritorySri Lanka
    CityKandy
    Period06/12/201009/12/2010

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