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Design of Rotary Magnetic Position Sensor with Sinusoidally Magnetized Permanent Magnet  

Jeong, Seung-Ho (한양대 전자전기제어계측공학과)
Rhyu, Se-Hyun (전자부품연구원)
Kwon, Byung-Il (한양대 전자전기제어계측공학과)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.56, no.3, 2007 , pp. 506-513 More about this Journal
Abstract
This paper proposes a rotary magnetic position sensor which has a sinusoidally magnetized permanent magnet with a small number of poles. To make the sinusoidal magnetic flux density distribution from the permanent magnet, a magnetizing future is optimized by the DOE(Design of Experiments) method. The magnetization process is analyzed using the Preisach model and 2 dimensional finite element method. The magnetic flux density distribution from the magnetized permanent magnet is very similar to ideal sine wave. The simulation result of the magnetic flux density distribution is compared with the experimental one. Also the availability of the proposed rotary type magnetic position sensor is confirmed by position calculation technique.
Keywords
Design of experiments; finite element method(FEM); magnetic sensor; magnetization; Preisach model;
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