A design of mini actuator for compact camera without using permanent magnet

Ching Lung Tsai, Der-Cherng Liaw

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper presents a design of mini actuator without using permanent magnet for auto-focus (AF) compact camera module (CCM) built on mobile phone, tablet PC and notebook. The current through the coils of electromagnets will yield magnetic force to move the moving part up and down. Comparing with conventional spring-type voice coil motor (VCM) and non-spring type VCM, the proposed actuator eliminates the concerns of rare earth supply and magnetic flux leakage which can fail the function of magnetic flux sensitive device such as e-compass. The proposed actuator also simplifies the power converter design from bipolar scheme as required by conventional non-spring type VCM to unipolar. A comprehensive electromagnetic analysis is performed by using finite element method to characterize the performance of the proposed actuator. Numerical simulations demonstrate that the magnetic flux leakage in the proposed actuator is much smaller than those by conventional design.

Original languageEnglish
Title of host publicationMachine Design and Manufacturing Engineering III
PublisherTrans Tech Publications Ltd
Pages483-489
Number of pages7
ISBN (Print)9783038351801
DOIs
StatePublished - 1 Jan 2014
Event3rd International Conference on Machine Design and Manufacturing Engineering, ICMDME 2014 - Jeju Island, Korea, Republic of
Duration: 24 May 201425 May 2014

Publication series

NameApplied Mechanics and Materials
Volume607
ISSN (Print)1660-9336
ISSN (Electronic)1662-7482

Conference

Conference3rd International Conference on Machine Design and Manufacturing Engineering, ICMDME 2014
CountryKorea, Republic of
CityJeju Island
Period24/05/1425/05/14

Keywords

  • Auto-focus
  • Magnetic force
  • Mini actuator
  • No permanent magnet

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  • Cite this

    Tsai, C. L., & Liaw, D-C. (2014). A design of mini actuator for compact camera without using permanent magnet. In Machine Design and Manufacturing Engineering III (pp. 483-489). (Applied Mechanics and Materials; Vol. 607). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/AMM.607.483