物理学报
物理學報
물이학보
2013年
8期
084105-1-084105-7
,共1页
永磁体%外部磁场%不均匀性%退磁场
永磁體%外部磁場%不均勻性%退磁場
영자체%외부자장%불균균성%퇴자장
permanent magnet%external magnetic field%inhomogeneity%demagnetizing field
从永磁体的分子电流观点、退磁场、工艺等出发,以矩形永磁体为例,从理论上分析了影响永磁体外部磁场不均匀性的各种因素.研究结果表明,永磁体外部磁场宏观不均匀性(好场区均匀度和面积相对大小)和空间距离及永磁体的外形设计密切相关.退磁场对永磁体外部磁场微观不均匀性有着复杂影响.永磁体工艺如粉末颗粒、取向度、烧结凝固、机械加工等将影响永磁体外部磁场的不均匀性,如磁化偏角、对称性、光滑性等.
從永磁體的分子電流觀點、退磁場、工藝等齣髮,以矩形永磁體為例,從理論上分析瞭影響永磁體外部磁場不均勻性的各種因素.研究結果錶明,永磁體外部磁場宏觀不均勻性(好場區均勻度和麵積相對大小)和空間距離及永磁體的外形設計密切相關.退磁場對永磁體外部磁場微觀不均勻性有著複雜影響.永磁體工藝如粉末顆粒、取嚮度、燒結凝固、機械加工等將影響永磁體外部磁場的不均勻性,如磁化偏角、對稱性、光滑性等.
종영자체적분자전류관점、퇴자장、공예등출발,이구형영자체위례,종이론상분석료영향영자체외부자장불균균성적각충인소.연구결과표명,영자체외부자장굉관불균균성(호장구균균도화면적상대대소)화공간거리급영자체적외형설계밀절상관.퇴자장대영자체외부자장미관불균균성유착복잡영향.영자체공예여분말과립、취향도、소결응고、궤계가공등장영향영자체외부자장적불균균성,여자화편각、대칭성、광활성등.
@@@@From molecular current viewpoint, demagnetizing field and process of permanent magnet, taking rectangular permanent magnets for example, the various factors that affect inhomogeneity of external magnetic field for permanent magnet are analyzed. The results indicate that the macroscopic inhomogeneity of external magnetic field for permanent magnet is closely related to space distance and shape of permanent magnet design. Demagnetizing field of permanent magnet has a complex influence on micro-inhomogeneity of external magnetic field. Technology of permanent magnet such as powder particles, orientation degree, sintering solidification, mechanical processing will affect inhomogeneity of external magnetic field of permanent magnet such as magnetic degree, symmetry, smoothness, etc.
