A theoretical method for designing thin wobble motor using an electromagnetic force and an electropermanent magnet for application in portable electric equipment

Sang Yong Park, Buchun Song, Yoon Su Baek

Research output: Contribution to journalArticlepeer-review

Abstract

The thin wobble motors that are required to hold rating shafts employ an electropermanent magnet. This turns the holding force on and off by applying a momentary electrical pulse. To design the magnet devices without the need for finite element analyses, a theoretical force model is necessary for predicting the attractive force. In this paper, first, a force model is derived by estimating the permeance around the air gap. A magnetic circuit is constructed, employing a relatively simple method to build the model in clouding leakage flux. Thus, the basic structure and driving principle are also presented. Next, an analytical force model is constructed on the basis of distribution parameter analysis between the stator and the rotating shaft. The design of the electromagnet core and the control method are presented. Finally, a prototype model of the motor that is 30 mm in diameter and 7 mm in thick is fabricated. The two models are verified by comparing the results of FEM with the results of the experiments. They can properly predict the attractive force, so the thin wobble motor with holding force can be applied in portable electric equipment.

Original languageEnglish
Article number881
Pages (from-to)1-14
Number of pages14
JournalApplied Sciences (Switzerland)
Volume11
Issue number2
DOIs
Publication statusPublished - 2021 Jan 2

Bibliographical note

Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Instrumentation
  • Engineering(all)
  • Process Chemistry and Technology
  • Computer Science Applications
  • Fluid Flow and Transfer Processes

Fingerprint

Dive into the research topics of 'A theoretical method for designing thin wobble motor using an electromagnetic force and an electropermanent magnet for application in portable electric equipment'. Together they form a unique fingerprint.

Cite this