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Study on Multi-DOF Actuator for Improving Power Density

Author

Listed:
  • Sooyoung Cho

    (Department of Electrical Engineering, Hanyang University, Seoul 04763, Korea)

  • Ho Joon Lee

    (Department of Electric Automatization, Busan Institute of Science & Technology, Busan 46639, Korea)

  • Ju Lee

    (Department of Electrical Engineering, Hanyang University, Seoul 04763, Korea)

Abstract

This study focuses on improving the power density of a spherical multi-degree-of-freedom (multi-DOF) actuator. A spherical multi-DOF actuator that can operate in three DOFs is designed. The actuator features a double air gap to reduce eddy current loss. However, a multi-DOF actuator driven by a single actuator exhibits low power density. Therefore, a Halbach magnet array is applied to improve the power density of a spherical multi-DOF actuator, and its output characteristics are compared with those of an existing spherical multi-DOF actuator via finite element analysis. Additionally, the output characteristics are analyzed based on changes in the coil pitch angle and magneto-motive force of the rotating winding. Furthermore, it is necessary for a spherical multi-DOF actuator to move to the command position. Hence, a stability analysis is performed to ensure that the spherical multi-DOF actuator is stably driven based on the command position.

Suggested Citation

  • Sooyoung Cho & Ho Joon Lee & Ju Lee, 2019. "Study on Multi-DOF Actuator for Improving Power Density," Energies, MDPI, vol. 12(21), pages 1-14, November.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:21:p:4204-:d:283377
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