Inductance bụ akụkụ dị mkpa nke ọkụ ọkụ DC/DC. Enwere ọtụtụ ihe ị ga-atụle mgbe ị na-ahọrọ inductor, dị ka uru inductance, DCR, nha, na saturation current. A na-aghọtahiekarị njirimara saturation nke inductors ma na-akpata nsogbu. Akwụkwọ a ga-atụle ka inductance na-erute saturation, ka saturation si emetụta sekit, na usoro nke ịchọpụta saturation inductance.
Inductance saturation na-akpata
Nke mbụ, jiri nlezianya ghọta ihe saturation inductance bụ, dị ka egosiri na foto 1:
Onyonyo 1
Anyị maara na mgbe a na-agafe ugbu a site na eriri igwe dị na Figure 1, eriri igwe ga-emepụta oghere magnet;
A ga-eme ka ihe ndọta ahụ dị n'okpuru arụ ọrụ nke oghere ndọta, na ngalaba ndọta dị n'ime ga-eji nwayọọ nwayọọ na-atụgharị.
Mgbe magnetik core zuru ezu magnetized, ntụziaka nke magnetik ngalaba niile bụ otu ihe ahụ dị ka magnetik, ọ bụrụgodị na mpụga ndọta na-abawanye, magnetik core enweghị magnetik ngalaba nwere ike bugharia, na inductance na-abanye n'ọnọdụ jupụtara. .
Site n'echiche ọzọ, na usoro ndọta egosiri na eserese 2, mmekọrịta dị n'etiti njupụta magnetik B na ike ndọta H na-ezute usoro dị n'aka nri na eserese 2:
Mgbe njupụta magnetik ruru Bm, njupụta magnetik anaghịzi abawanye nke ukwuu site na mmụba nke ike ndọta, na inductance na-erute saturation.
Site na mmekọrịta dị n'etiti inductance na permeability µ, anyị nwere ike ịhụ:
Mgbe inductance juru eju, µm ga-ebelata nke ukwuu, ma emesịa, inductance ga-ebelata nke ukwuu ma ikike ịkwụsị nke ugbu a ga-efunahụ ya.
Onyonyo 2
Ndụmọdụ maka ịchọpụta saturation inductance
Enwere ndụmọdụ ọ bụla maka ikpe ikpe saturation inductance na ngwa bara uru?
Enwere ike ịchịkọta ya na ngalaba abụọ bụ isi: ngụkọ usoro na nnwale nnwale.
☆Ngụkọ usoro ihe omume nwere ike ịmalite site na njupụta ndọta kacha elu yana oke inductance ugbu a.
☆Nnwale nnwale ahụ lekwasịrị anya n'ụdị inductance dị ugbu a na ụfọdụ ụzọ ikpe mbido ndị ọzọ.
A kọwara ụzọ ndị a n'okpuru.
Gbakọọ njupụta magnetik
Usoro a dabara adaba maka imepụta inductance site na iji isi magnetik. Akụkụ isi gụnyere ogologo sekit magnetik le, mpaghara dị irè Ae na ihe ndị ọzọ. Ụdị magnetik isi na-ekpebikwa ọkwa ihe ndọta kwekọrọ, na ihe ndọta na-eme ndokwa kwekọrọ na mfu nke isi magnetik na saturation magnetik flux density.
Site na ihe ndị a, anyị nwere ike gbakọọ njupụta magnetik kachasị dị ka ọnọdụ nhazi n'ezie, dị ka ndị a:
Na omume, enwere ike ime ka mgbako ahụ dị mfe, na-eji ui kama ur; N'ikpeazụ, ma e jiri ya tụnyere saturation flux density nke magnetik, anyị nwere ike ikpebi ma inductance emebere ọ nwere ihe ize ndụ nke saturation.
Gbakọọ oke inductance ugbu a
Usoro a dabara adaba maka imepụta sekit ozugbo site na iji inductor emechara.
topologies sekit dị iche iche nwere usoro dị iche iche maka ịgbakọ inductance ugbu a.
Were Buck mgbawa MP2145 dị ka ihe atụ, enwere ike gbakọọ ya dị ka usoro a si dị, yana nsonaazụ a gbakọrọ nwere ike iji tụnyere uru nkọwapụta inductance iji chọpụta ma inductance ga-ejupụta.
Na-ekpe ikpe site n'ụdị ebili mmiri dị ugbu a inductive
Usoro a bụkwa usoro a na-ahụkarị na nke bara uru na omume injinia.
Na-ewere MP2145 dị ka ọmụmaatụ, MPSmart simulation ngwá ọrụ na-eji maka ịme anwansị. Site na simulation waveform, enwere ike ịhụ na mgbe inductor na-ejupụtaghị, inductor current bụ ebili mmiri triangular nwere ụfọdụ mkpọda. Mgbe onye inductor juputara, ụdị ikuku nke inductor dị ugbu a ga-enwe mgbagwoju anya doro anya, nke kpatara mbelata inductance mgbe saturation gasịrị.
Na omume injinia, anyị nwere ike ịhụ ma enwere mgbagha nke inductance ugbu a waveform dabere na nke a iji kpee ikpe ma inductance ọ bụ juputara.
N'okpuru bụ ebili mmiri tụrụ na bọọdụ ngosi MP2145. Enwere ike ịhụ na enwere mgbagwoju anya doro anya mgbe saturation gasịrị, nke kwekọrọ na nsonaazụ simulation.
Tulee ma inductance ọ na-ekpo ọkụ nke ukwuu wee gee ntị maka ịsụ ahịhịa na-adịghị mma
E nwere ọtụtụ ọnọdụ na engineering omume, anyị nwere ike na-amaghị kpọmkwem isi ụdị, o siri ike ịmata inductance saturation ugbu size, na mgbe ụfọdụ ọ bụghị adaba iji nwalee inductance ugbu a; N'oge a, anyị nwekwara ike na-ebu ụzọ chọpụta ma saturation mere site n'ịle ma inductance nwere oke okpomọkụ ịrị elu, ma ọ bụ na-ege ntị ma enwere m mkpu na-adịghị mma.
Ewebata ndụmọdụ ole na ole maka ịchọpụta saturation inductance ebe a. Enwere m olileanya na ọ bara uru.
Oge nzipu: Jul-07-2023
