Indlela yokunciphisa ilahleko ye-inductor core | PHILA

Siyazi ukuba i -inductance core yimveliso eya kusetyenziswa kwiimveliso ezininzi ze-elektroniki, iimveliso zombane ziya kuvelisa ilahleko ethile kwinkqubo yokusetyenziswa, kwaye i- inductance core ayinjalo. Ukuba ilahleko ye-inductor core inkulu kakhulu, iya kuchaphazela ubomi benkonzo ye-inductor core.

Uphawu lokulahleka kwe-inductor core (ikakhulukazi kubandakanywa ukulahlekelwa kwe-hysteresis kunye nokulahleka kwangoku kwe-eddy) yenye yezona zibonakaliso ezibalulekileyo zezixhobo zamandla, ezichaphazela kwaye zigqibe ukusebenza kakuhle, ukunyuka kweqondo lokushisa kunye nokuthembeka komatshini wonke.

Inductor ilahleko engundoqo

1. Ilahleko ye-Hysteresis

Xa izinto ezingundoqo zenziwe ngemagnethi, kukho iinxalenye ezimbini zamandla ezithunyelwa kumhlaba wemagnethi, enye yazo iguqulwa ibe amandla anokubakho, oko kukuthi, xa umbane wangaphandle ususiwe, amandla ombane anokubuyiselwa kwisekethe. , ngelixa elinye inxalenye idliwe yi-friction eyoyisayo, ebizwa ngokuba yi-hysteresis loss.

Ummandla wesithunzi se-curve ye-magnetization imele ukulahlekelwa kwamandla okubangelwa yi-hysteresis kwinkqubo ye-magnetization ye-core magnetic kumjikelezo wokusebenza. Iiparamitha ezichaphazela ummandla welahleko ngowona msebenzi mkhulu wokuxinana kwemagnethi eguquguqukayo B, obona bunzima buphezulu bemagnethi H, i-remanence Br kunye nokunyanzeliswa kwamandla e-Hc, apho ukuxinana kwemagnethi kunye namandla omhlaba wemagnethi kuxhomekeke kwiimeko zangaphandle zombane kunye iiparamitha zobungakanani obungundoqo, ngelixa i-Br kunye ne-Hc zixhomekeke kwizinto eziphathekayo. Ngexesha ngalinye le-magnetization ye-inductor core, kuyimfuneko ukulahlekelwa amandla alinganayo kwindawo ejikelezwe yi-hysteresis loop. Okukhona ukuphindaphindeka, kokukhona amandla elahleko emakhulu, kokukhona ujingi lokungeniswa kozibuthe, inkulu indawo ebiyelweyo, kokukhona ilahleko enkulu i-hysteresis.

2. Eddy ilahleko yangoku

Xa i-voltage ye-AC yongezwa kwikhoyili ye-magnetic core, i-excitation yangoku ihamba kwikhoyili, kwaye yonke i-flux magnetic eveliswa yi-ampere eyonwabileyo ijika idlula kwi-core magnetic. Undoqo wamagnetic ngokwawo ngumqhubi, kwaye yonke i-flux yamagnetic ejikeleze icandelo lomnqamlezo we-core magnetic idityaniswe ukwenza ikhoyili enye yesibini. Ngenxa yokuba ukuxhathisa kwezinto ezingundoqo zemagneti akunasiphelo, kukho ukuxhathisa okuthile malunga nombindi, kwaye umbane owenziweyo uvelisa okwangoku, oko kukuthi, i-eddy current, ehamba ngolu hlobo, ibangela ilahleko, oko kukuthi, ilahleko yangoku ye-eddy.

3. Ilahleko eshiyekileyo

Ilahleko eshiyekileyo ibangelwa yi-magnetization relaxation effect okanye i-magnetic hysteresis effect. Into ebizwa ngokuba yi-relaxation ithetha ukuba kwinkqubo yemagnetization okanye i-anti-magnetization, imeko ye-magnetization ayitshintshi ngokukhawuleza ukuya kwimeko yayo yokugqibela kunye nokutshintsha kokuqina kwemagnetization, kodwa ifuna inkqubo, kwaye le "impembelelo yexesha" yimbangela ilahleko eshiyekileyo. Ikakhulu ikwisantya esiphezulu se-1MHz ngaphezulu kwelahleko ethile yokuphumla kunye nokujikeleza kweresonance yamagnetic njalo njalo, kunikezelo lwamandla okutshintsha amakhulu e-KHz yombane wombane, ubungakanani belahleko obushiyekileyo buphantsi kakhulu, bunokungahoywa.

Xa ukhetha i-core magnetic efanelekileyo, ii-curves ezahlukeneyo kunye neempawu ze-frequency kufuneka ziqwalaselwe, kuba i-curve inquma ukulahleka kwe-frequency ephezulu, i-saturation curve kunye ne-inductance ye-inductor. Ngenxa yokuba i-eddi yangoku kwelinye icala ibangela ilahleko yokuchasa, ibangela ukuba izinto zemagneti zifudumale, kwaye ibangela ukuba i-excitation yangoku inyuke, kwelinye icala inciphisa indawo esebenzayo yokwenziwa kwemagnethi yombindi wemagnethi. Ke ngoko, zama ukukhetha izixhobo zamagnetic ezinokumelana okuphezulu okanye ngohlobo lomtya oqengqelekayo ukunciphisa ilahleko yangoku ye-eddy. Ke ngoko, izinto ezintsha zeplatinam i-NPH-L ifanelekile kwilahleko ephantsi yentsimbi yepowder cores ye-frequency ephezulu kunye nezixhobo zamandla aphezulu.

Ilahleko engundoqo ibangelwa yintsimi yamagnetic etshintshanayo kwizinto eziphambili. Ilahleko ebangelwa yinto ethile ngumsebenzi we-frequency yokusebenza kunye ne-flux swing iyonke, ngaloo ndlela inciphisa ukulahleka kokuqhuba okusebenzayo. Ilahleko engundoqo ibangelwa yi-hysteresis, i-eddy current kunye ne-residual loss of the core material. Ke ngoko, ilahleko engundoqo sisimbuku sokulahleka kwe-hysteresis, ilahleko yangoku ye-eddy kunye nokulahleka kokuhlala. Ukulahleka kwe-Hysteresis yilahleko yamandla ebangelwa yi-hysteresis, ehambelana nommandla ojikelezwe yi-hysteresis loops. Xa i-magnetic field idlula kwiinguqu ezingundoqo, i-eddy current iyenzeka kwi-core, kwaye ilahleko ebangelwa yi-eddy yangoku ibizwa ngokuba yi-eddy current loss. Ilahleko eyintsalela yiyo yonke ilahleko ngaphandle kokulahleka kwe-hysteresis kunye nelahleko yangoku ye-eddy.