Optimal design of a ferromagnetic yoke for reducing crosstalk in optical image stabilization actuators

Jung Hyun Woo, Jun Ho Yoon, Young Jun Hur, No Cheol Park, Young Pil Park, Kyoung Su Park

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


In this study, we propose the optimal shape of a ferromagnetic yoke intended to reduce the crosstalk that occurs because of fringe effects at the edge of the magnet used in optical image stabilization (OIS) actuators. Topology optimization was performed with finite element (FE) analysis to determine the optimal shape of the ferromagnetic yoke without degrading the performance of the actuator. To promote the effective use of the topology optimization, the problem was simplified into a 2-D FE analysis, and finite difference approximation was used in the sensitivity analysis. The closest objective function to the special reference value was defined to minimize both the standard deviation and the average magnetic flux density in the y-direction for the Hall effect sensor. Consequently, the optimal shape of the ferromagnetic yoke, obtained by using topology optimization under various volume fraction constraints, was verified using 3-D FE analysis. The results demonstrate that the suggested design method is useful and effective.

Original languageEnglish
Article number6027778
Pages (from-to)4298-4301
Number of pages4
JournalIEEE Transactions on Magnetics
Issue number10
Publication statusPublished - 2011 Oct

Bibliographical note

Funding Information:
This work was supported by the Ministry of Knowledge Economy (MKE) funded by the Korea Government (10035365).

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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