Design of a large stroke flexure-based suspension for an iron core torque motor

M. Naves*, M. Nijenhuis, W. B.J. Hakvoort, D. M. Brouwer

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    1 Citation (Scopus)
    141 Downloads (Pure)


    Iron core torque motors provide a high power density, but require high off-axis stiffness, which is normally too demanding for flexure mechanisms especially when considering large range of motion applications. In this paper, a flexure-based suspension for a high torque iron core direct drive torque motor with a large range of motion of 60 degrees is presented. This flexure-based suspension provides the required high radial stiffness (>1000N/mm) combined with a high radial load capacity (500N) over the full range of motion. Furthermore, the suspension maintains a constant position of the pivot axis within 0.1mm, which is required to limit pull-in forces and to stay within alignment tolerances of the actuator. A prototype has been designed and constructed and experimental validations confirm the high radial stiffness and load capacity of the rotor suspension.

    Original languageEnglish
    Title of host publicationEuropean Society for Precision Engineering and Nanotechnology, Conference Proceedings - 19th International Conference and Exhibition, EUSPEN 2019
    EditorsRichard K. Leach, D. Billington, C. Nisbet, D. Phillips
    Number of pages4
    ISBN (Electronic)9780995775145
    Publication statusPublished - Jun 2019
    Event19th EUSPEN International Conference & Exhibition, ICE 2019 - Euskalduna, Bilbao, Spain
    Duration: 3 Jun 20197 Jun 2019
    Conference number: 19


    Conference19th EUSPEN International Conference & Exhibition, ICE 2019
    Abbreviated titleICE 2019
    Internet address


    • Compliant mechanisms
    • Flexure mechanisms
    • Iron core motor
    • Large stroke


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