Kusarudza inductor yakaumbwa yakakodzera (Molding Choke) yedunhu, kwete chete nekutaridzika kwayo, asi nekutarisa mashandiro ayo anochinja-chinja uye zvipingamupinyi zvemuviri mudunhu.
Monolithic inductors inonyanya kushandiswa muma power circuits (akadai seDC-DC converters) kuita mabasa ekuchengetedza simba, kusefa, uye freewheeling. Kuti tikubatsire kusarudza zvakanaka, tichaparadzanisa maitiro ekusarudza kuita matanho mashanu anotevera:
1. Sarudza saizi chaiyo uye kurongedza (Danho 1: Zvichakwana here?)
Iyi ndiyo nzira inonyanya kukosha yekuongorora. Monolithic inductors inowanzova maumbirwo akafanana nerectangular akaita sechip.
* Zvipingamupinyi zveDimensional: Yera saizi nemiganhu yekukwirira kwemapedhi akachengetwa paPCB. Zviyero zvakajairika zvinosanganisira 3.0×3.0mm, 4.0×4.0mm, 5.0×5.0mm, nezvimwewo, nehurefu hunobva pa1.0mm kusvika 5.0mm.
* Dhizaini yeChiteshi: Simbisa kana iri pini yakajairika ye "two-terminal" kana kuti pini ye "four-terminal" yakagadzirirwa kuderedza mwaranzi.
* Cherechedza: Kunyangwe kureba nehupamhi zvakafanana, kukwirira kunowanzo sarudza kushivirira kwesimba kweinductor. Iva nechokwadi chekuti hausarudze isiriyo.
2. Verenga uye enzanisa inductance (L kukosha)
Kupinda kwemagetsi kunosarudza hukuru hwema "current ripple". Kusarudza kuti yakakura kana kuti diki zvakanyanya kunokanganisa kushanda zvakanaka kwemagetsi.
* Tarisa bhuku remachipisi: Mapepa edata emasekete mazhinji ekugadzirisa simba (ICs) anopa mafomura anokurudzirwa ekuverenga kukosha kweinductance.
Fomura yakajairika inogona kufungidzirwa se L={(V_{in}-V_{out})XV_{out}/{V_{in}Xf_{sw}XI_{out} XRippleRatio}}
* apo f_{sw} iri frequency yekuchinja, uye RippleRatio inowanzo kuve 20%~30%.
* Kushivirira: Monolithic inductors inowanzo shivirira ±20% kana ±30% (semuenzaniso, magiredhi eM kana N), uye muganho unofanirwa kuchengetwa panguva yekuverenga.
3. Ma "currents" ese ari maviri anofanira kutariswa
Iyi ndiyo chikamu chinowanzo kanganisa! Datasheet ye integral molded inductors inowanzo tsanangura ma currents maviri akasiyana, uye mamiriro ese ari maviri anofanira kuzadzikiswa panguva imwe chete:
* Kuzara kwemvura (I_{sat}): Muganho wakaoma
* Tsanangudzo: Nguva yemagetsi kana inductance yadzikira kusvika pachiyero chakati (kazhinji 10% kusvika 30% yehuwandu hwekutanga).
*Nzira yekusarudza: I_{sat} inofanira kunge yakakura kupfuura peak current (I_{peak}) mucircuit.
*Kuverengera kwehuwandu hwemagetsi: I_{peak} = I_{out} + ΔI_L/2 (kureva, huwandu hwemagetsi anobuda pamwe nehafu yehuwandu hwemagetsi anoputika).
*Mhedzisiro: Kana I_sat isina kukwana, inductor inozadza simba remagineti pakarepo, zvichikonzera kudzikira kwakanyanya kweinductance uye zvichikonzera kukwira nekukurumidza kwemagetsi, izvo zvinogona kupisa switching transistor.
Kukwira kwemhepo yekupisa (I2 {rms}): chiyero chekupisa
*Tsananguro: Mudzi wepakati wepakati wemagetsi apo tembiricha yepamusoro yeinductor inowedzera nemutengo wakatarwa (kazhinji 40 ° C).
*Maitiro ekusarudza: I2 {rms} inofanira kunge yakakura kupfuura simba guru remagetsi rinobuda (I2 {out}) mudunhu.
*Mhedzisiro: Kana I2 {rms} isina kukwana, inductor ichapisa zvakanyanya, izvo zvisingangoderedzi kushanda zvakanaka chete asiwo zvinogona kukuvadza majoini ePCB solder.
4. Teererai kusimba kweDC (DCR) uye kushanda zvakanaka kwayo
DCR (Direct Current Resistance) isimba rekudzivirira kweinductor coil pachayo.
*Kukanganisa: DCR inogona kukonzera kurasikirwa kwemhangura (P_ {kurasikirwa}=I ^ 2 XR), iyo inoshandurwa zvakananga kuita kupisa uye inoderedza kushanda kwesimba.
*Zvakaringana: Kana saizi nemari zvichibvumira, DCR diki ndiyo iri nani.
5. Funga nezvehuwandu hwekuzvirumbidza
Chiitiko che electromagnetic induction chinoitika kana magetsi achiyerera nepakati pe conductor pachawo achichinja. Kana waya yesimbi ikashandiswa kugadzira coil uye magetsi achiyerera nepakati pe coil achichinja, chiitiko chakakosha che electromagnetic induction chichaitika. Simba re coil rinozvikonzera reverse electromotive rinotadzisa shanduko yemagetsi uye rinoita basa rekudzikamisa magetsi. Kunyanya, kana inductor iri mumamiriro ekuti hapana magetsi anopfuura nepakati, ichaedza kudzivirira magetsi kuti asafambe nepakati payo kana circuit yavhurwa; Kana inductor iri mumamiriro ekuti magetsi ari kupfuura nepakati, ichaedza kuchengetedza magetsi asingachinji kana circuit yabviswa.
Nguva yekutumira: Ndira-21-2026