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비대칭 착자에 따른 스핀들 모터 특성에 관한 연구

Title
비대칭 착자에 따른 스핀들 모터 특성에 관한 연구
Other Titles
A Study on Characteristic of Spindle Motor by Asymmetric Magnetization Distribution in Permanent Magnet
Author
박재영
Alternative Author(s)
Park, Jae Young
Advisor(s)
이 주
Issue Date
2009-08
Publisher
한양대학교
Degree
Master
Abstract
ABSTRACT A Study on Characteristic of Spindle Motor by Unsymmetric Magnetization Distribution in Permanent Magnet by JAE YOUNG PARK under the supervision of Professor JU LEE, Ph. D. Department of Electrical Engineering The Graduate School of Hanyang University In case, The permanent magnet of spindle motor for Optimal Disk Drive(ODD) is magnetized by magnetizer. Permanent magnet is generally putted between yoke and back yoke of magnetizer so that symmetric magnetization distribution. Magnetization Distribution of magnet is defined by magnetizer, and Chracteristic of Spindle motor is also defined by Magnetization Distribution of magnet. so, magnetizer is imfortant so that we abtain the magnet which we want. when Magnet is magnetized, yoke's position is center of magnetizer, and coil position is also centered in magnetizer for symertic magnetization distribution of magnet. However, In mass production of magnet of spindle motor for ODD the magnetizing yoke' eccentricity is occurred. and In mass production of magnetizer for spindle motor the magnetizing coil eccentricity is also occurred. So, for each case, magnetizing distribution of magnet is different from center position of magnetizing coil and yoke. when asymmetric distribution of magnet is mapped to spindle motor, Cogging torque and Back emf of spindle motor is different from symmetric distribution of magnet.[5] In this paper, according to previous paragraph, When magnetizing yoke eccentricity and magnetizing coil eccentricity is occurred, check out magnetizing distribution of magnet and when asymmetric distribution of magnet is mapped to spindle motor, To confirm change condition Cogging torque and Back emf of spindle motor conduct analysis using the finite element method(FEM). Reshape core of spindle motor to verify change condition Cogging torque when asymmetric distribution of magnet is mapped to spindle motor.
URI
https://repository.hanyang.ac.kr/handle/20.500.11754/143512http://hanyang.dcollection.net/common/orgView/200000412451
Appears in Collections:
GRADUATE SCHOOL[S](대학원) > ELECTRICAL ENGINEERING(전기공학과) > Theses (Master)
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