iindaba

Inductor yendlela eqhelekileyokuthetha ukuba iikhoyili ezimbini zenzakala kumbindi wentsimbi omnye, zineejiko ezichaseneyo, inani lokujika kunye nesigaba esifanayo. Idla ngokusetyenziswa ekutshintsheni unikezelo lwamandla ukucoca imiqondiso yendlela eqhelekileyo yokuphazamiseka kombane, izihluzi ze-EMI zisetyenziselwa ukucinezela amaza ombane oveliswa yimigca yemiqondiso enesantya esiphezulu ephuma ngaphandle. I-inductance yemowudi eqhelekileyo kwigalelo lemodyuli yamandla idla ngokunciphisa i-radiation kunye ne-high frequency common mode ingxolo. Nangona kunjalo, i-inductance enkulu ye-common-mode inductance inefuthe elihle lokunciphisa ukuphazamiseka kwe-low-frequency, kunye ne-frequency high-frequency ingaba yimbi ngakumbi, kodwa imvakalelo encinci inefuthe elibi loxinzelelo kwi-low-frequency disorder.

Inefuthe elicacileyo lokucinezela kwimowudi yengxolo eqhelekileyo. Umgaqo osebenzayo kukuba xa imowudi eqhelekileyo yangoku idlula kwicandelo, i-inductances ye-inductors ezimbini zidibanisa. Kodwa ingxolo yemowudi yokwahlula, ezi zimbini zonxibelelwano zilingana nokuthatha umahluko, ixabiso le-inductance liyancipha, kwaye isiphumo soxinzelelo siya kuba buthathaka.

Ubungakanani be-inductance yemodi eqhelekileyo buya kuchaphazela ngokuthe ngqo ukusebenza kwe-EMC. Umsebenzi oyintloko kukwahlula isignali yemowudi eqhelekileyo kwaye uthintele ukuphazamiseka kwemowudi eqhelekileyo yangaphandle, ngaloo ndlela kuncitshiswe impembelelo kunikezelo lwamandla. Kwakhona kunokunciphisa umqondiso wemowudi eqhelekileyo yangaphakathi kunye nokunciphisa impembelelo kwigridi yamandla. Nangona kunjalo, i-inductance enkulu ye-common-mode inductance inefuthe elihle lokunciphisa ukuphazamiseka kwe-low-frequency, kunye ne-frequency high-frequency ingaba yimbi ngakumbi, kodwa imvakalelo encinci inefuthe elibi loxinzelelo kwi-low-frequency disorder.

Esiqhele ukukusebenzisa ekupheleni kwegalelo lemodyuli yamandla ngu-x umthamo, umthamo we-y kunye nemowudi eqhelekileyo yokwenziwa. Umthamo une-impedance ephantsi kwisignali, esebenza njenge-bypass kunye nesignali yokudibanisa. I-inductance yi-impedance ephezulu kwisignali kwaye idlala indima ekuboniseni nasekuthatheni izibonakaliso zokuphazamiseka okuphezulu.

Uphazamiseko phakathi kweentambo ezimbini zamandla emhlabeni kuthiwa lungenelelo lwemowudi eqhelekileyo, kwaye uphazamiseko phakathi kweentambo ezimbini zamandla kuthiwa lungenelelo lwemo yokwahlukana. Xa i-inductance kunye ne-capacitance idibaniswe kwisihlunu, umphumo wokucoca ungcono, kunye nebhendi ye-frequency apho i-inductance kunye ne-capacitance idlala indima. Kwakhona ezahlukeneyo. I-Y capacitor kunye ne-Y capacitor idlala indima ekuhlungeni ukuphazamiseka kwemodi eqhelekileyo, kwaye i-X capacitor isebenza ngokuyinhloko njengomqondiso wesiphaluka esifutshane, ukunciphisa indlela apho umqondiso wemowudi yokwahlukana uhamba, ngaloo ndlela unciphisa i-oscillation ebangelwa iiparameters zeparasitic kwi. isekethe kunye nokubangela ukukhutshwa kwe-high-frequency.

Xa i-inductance okanye i-capacitance ikhutshwe kuyilo, inxalenye eseleyo iya kusebenza, kodwa umphumo uya kuba mbi kakhulu. Ngokubanzi, okukhona inkulu i-impedance yemowudi eqhelekileyo, ingcono. Xa ukhetha i-inductor yendlela eqhelekileyo, ukhetho lusekelwe ikakhulu kwi-curve frequency ye-impedance. Ngelo xesha, ingqalelo kufuneka ihlawulwe kwimpembelelo ye-impedance yendlela yokwahlukana kwisignali.