Demagnetization curve of ferrite materials 鐵氧體退磁曲線
Demagnetization curves of sintered magnet n42 at different temperatures 燒結(jié)磁體n42h在不同溫度下的退磁曲線
Demagnetization curves of sintered magnet n33sh at different temperature 燒結(jié)磁體n38sh在不同溫度下的退磁曲線
By successful solution of non - linear magnetic fields and revision of the program , we can reach following conclusions : in the computation of nonlinear magnetic fields , if iteration method is used , under - relaxation is necessary when amending the permeability distribution in soft magnetic materials ; and when < wp = 5 > calculating the equivalent current density in permanent magnets , under - relaxation is not a necessity ; when searching for permeability values by interpolation method on the demagnetization curve of soft magnetic materials , if a fixed saturation point is set , around this point an abrupt change of permeability values will be obtained ; this sudden change may cause a little problem in the smoothness of magnetic field distribution ; because the magnetic circuits of microwave tubes are too complicated , in the author ' s view , to describe the working state of a magnet system , the working points of magnets can not do it properly but average energy production of magnets will serve ; as to indicate the quality of a magnet system design for microwave tubes , the efficiency of magnetic energy utilization will be a very good criterion 由此得出結(jié)論,在非線性磁場(chǎng)計(jì)算中:采用迭代法的情況下,在各迭代循環(huán)之間進(jìn)行磁導(dǎo)率修正時(shí),一個(gè)欠松弛迭代過(guò)程是必需的;對(duì)永磁體中的等效電流修正時(shí)可以不作欠松弛迭代;在純鐵的磁化曲線上指定某一個(gè)固定的磁感應(yīng)強(qiáng)度為磁飽和值,會(huì)使得插值求出的磁導(dǎo)率在該磁飽和值附近有一突變,這一突變對(duì)計(jì)算結(jié)果中磁場(chǎng)分布變化的光滑性稍有影響。在微波管磁系統(tǒng)設(shè)計(jì)中,由于微波管磁路比較復(fù)雜,作者認(rèn)為磁體的工作點(diǎn)并不能很好地反映磁體的工作狀態(tài),而采用平均磁能積為衡量磁體工作狀態(tài)的標(biāo)準(zhǔn)更加符合微波管磁系統(tǒng)的實(shí)際情況;要表示磁系統(tǒng)設(shè)計(jì)好壞的程度,則用磁能利用的效率為標(biāo)準(zhǔn)更好。
Magnetic force pump magnet couplings " universal energy equation is educed by analyzing of demagnetization curve , ways of reverting force calculating are introduced according to the equation when inside magnet rotor have axial direction and radial displacement , circumferential moment of magnetic force has been given , magnetic force pump alnico ' s axial direction length , circumferential length , radial thickness amounts are summarized with the analyses of experiment results 利用退磁曲線法,推導(dǎo)磁力泵聯(lián)軸器能量通用公式,導(dǎo)出內(nèi)磁轉(zhuǎn)子在軸向偏移和徑向偏置下產(chǎn)生的回復(fù)力計(jì)算方法,周向傳動(dòng)轉(zhuǎn)矩計(jì)算方法,結(jié)合試驗(yàn)結(jié)果,總結(jié)推薦磁力泵磁鋼軸向長(zhǎng)度、周向長(zhǎng)度、徑向厚度、磁極數(shù)設(shè)計(jì)方法。
The perfect magnetic field resolution and finite partial analyzing are future magnet calculating ways , combining magnetic force pump alnicos " character , virtue of gradual change magneto gram and ways of analyzing planar magneto gram by finite partial are introduced , the ways of acquiring demagnetization curve are introduced and illustrated in details 理想磁場(chǎng)的解析求解和有限元分析是磁力計(jì)算的未來(lái)方向,本文結(jié)合磁力泵磁鋼特點(diǎn),介紹了漸變磁路的優(yōu)點(diǎn)和利用有限差分法在求解二維磁場(chǎng)的思路和步驟,文中還總結(jié)了求解退磁曲線的詳細(xì)方法。