TDK鐵氧體磁芯B66335Q0100K187

鐵氧體磁芯與配件 E55/28/21-N87-DG100

制造商: TDK

產(chǎn)品種類: 鐵氧體磁芯 高頻磁環(huán) 高頻導(dǎo)磁環(huán) 錳鋅鐵氧體磁芯 納米晶軟磁芯 非晶合金磁芯  鎳鋅鐵氧體 

系列: E55/28/21

產(chǎn)品: Ferrite Cores

類型: Gapped

核心: E Core

芯體大小: 55 mm x 21 mm

電感: 100 nH

容差: 10 %

芯體材料: N87

封裝: Tray

商標: EPCOS / TDK

大工作溫度: + 155 C

外部高度: 27.8 mm

外部長度: 55 mm

外部寬度: 21 mm

產(chǎn)品類型: Ferrite Cores & Accessories

工廠包裝數(shù)量：108

子類別: Ferrites

零件號別名: B66335Q100K187

1. 永磁材料

永磁材料是一經(jīng)磁化即能保持恒定磁性的材料，具有寬磁滯回線、高矯頑力和高剩磁的特性，具備轉(zhuǎn)換、傳遞、處理、存儲信息和能量等功能。永磁體可以認為是不從外部供給能量，也可以使外部磁場持續(xù)發(fā)生的一類部件，其實質(zhì)是擁有高矯頑力，一經(jīng)外部磁場磁化后，即使在相當大的反向磁場中也能保持大部分原磁化方向的磁性。從材料角度分類，永磁體可分為鐵氧體永磁、稀土永磁及非稀土類金屬磁體（金屬永磁）三類；按實現(xiàn)塊體化方法分類，永磁體可分為非稀土類金屬磁體（鑄造永磁）、黏結(jié)永磁、燒結(jié)永磁及熱加工永磁。

永磁材料同時還要兼顧優(yōu)良加工性能，而且小型、輕量、等也是考慮因素，滿足全部性能要求的永磁體并不存在。磁力強的材料往往溫度穩(wěn)定性差，如稀土永磁在高溫下退磁嚴重，而磁力弱的材料往往價格較低，優(yōu)點和缺點相互折中。因此在選擇永磁體時要根據(jù)使用目的、性能要求和價格因素等選擇合適的品種。在實用永磁體中，金屬永磁（鋁鎳鈷永磁體）磁通密度高，溫度特性優(yōu)良，但矯頑力低容易退磁，且價格較貴；鐵氧體永磁磁通密度低，溫度特性差，但矯頑力高，價格便宜；稀土永磁（釹系永磁、釤系永磁）磁通密度高、矯頑力高，但溫度特性各異、且價格昂貴。綜合看，對于一般應(yīng)用來說，鐵氧體永磁屬于現(xiàn)有使用永磁體中性價比較為的一類。

永磁體的應(yīng)用極為廣泛，從揚聲器、話筒、電表、按鍵等小型部件，到大型部件如風能系統(tǒng)的風力發(fā)電機及磁共振成像MRI的磁場施加裝置等。近年來，新能源車用小型電動機更是為永磁體的應(yīng)用開辟了廣闊市場。根據(jù)使用場景需要，永磁材料可有不同形態(tài)和結(jié)構(gòu)。

（1）鐵氧體永磁材料

鐵氧體以氧化鐵為主成分，一般顯示亞鐵磁性，作為電力、電子相關(guān)的磁性材料被廣泛使用。鐵氧體按晶體結(jié)構(gòu)不同，大體可以分為三種類型：

①尖晶石鐵氧體：常見的鐵氧體軟磁材料，典型的有錳鋅鐵氧體、鎳鋅鐵氧體、銅鋅鐵氧體等，特點是磁導(dǎo)率高、電阻大，從而使磁性體中產(chǎn)生的渦流損耗小，因而被高頻線圈及變壓器中的磁芯材料廣泛應(yīng)用；

②六方晶鐵氧體：六方晶鐵氧體基于其六方結(jié)構(gòu)，磁各向異性大，從而擁有較大的矯頑力。代表性的有鍶鐵氧體和鋇鐵氧體，作為永磁體有廣泛應(yīng)用；

③石榴石鐵氧體：這種鐵氧體也成為稀土類鐵石榴石，典型代表使YIG釔鐵石榴石，屬于軟磁材料。

北京友盛興業(yè)科技有限公司代理供應(yīng)TDK鐵氧體磁芯,歡迎來電咨詢

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