Ib tag kis sawv ntxov hnub Monday, peb tau txais email los ntawm tus neeg siv sijhawm ntev - nyob hauv Spain uas yooj yim nyeem:
"Tus neeg tsav tsheb lub rooj vag tau ua tsis tiav dua. Peb tau hloov IGBTs ob zaug, hloov tus maub los ib zaug, thiab qhov teeb meem tseem rov qab los."
Thaum lub sijhawm lawv pab pawg engineering hu rau Wuxi Huipu Electronics Co., Ltd., lawv tau siv sijhawm ze li ib hlis los tshawb xyuas qhov ua tsis tiav. Txhua lub tshuab hluav taws xob tau raug kuaj xyuas, cov txheej txheem PCB tau raug kho dua, thiab cov software tseem tau rov sau dua los tshem tawm cov sijhawm yuam kev.
Lub pulse transformer yeej tsis xav txog.
Tom qab tag nrho, nws tsis tau hlawv, tawg los yog pom kev puas tsuaj.
Thaum peb kuaj lub transformer nyob rau hauv kev ua haujlwm tiag tiag, txawm li cas los xij, qhov teeb meem tau pom tseeb. Nws cov dej xau inductance tau siab dua li daim ntawv thov tuaj yeem zam, ua rau muaj qhov hluav taws xob loj heev txhua zaus cov khoom siv hloov pauv. Cov spikes maj mam ua rau tus neeg tsav tsheb lub rooj vag mus txog rau thaum kev ua tsis tiav.
Nov yog qee yam peb tau kawm ntau zaus ntau xyoo: pulse transformers tsis tshua muaj kev ua tsis zoo. Hloov chaw, lawv ntsiag to qhia cov teeb meem hluav taws xob me me uas nws thiaj li loj hlob mus rau qhov tsis ua haujlwm loj.
Ib qho teeb meem feem ntau yog waveform distortion.
Lub pulse transformer yog tsim los tsim hluav taws xob pulses kom raug raws li qhov ua tau. Thaum cov zis waveform tsis phim cov tswv yim lawm, switching circuits pib behaving unpredictably. Lub sij hawm nce qeeb zuj zus, mem tes dav hloov me ntsis, thiab qhov tau txais Circuit Court yuav tsis hloov thaum lub sijhawm raws nraim. Hauv cov khoom siv sib txuas lus, qhov no tuaj yeem ua rau cov ntaub ntawv tsis ruaj khov. Hauv cov rooj vag tsav tsheb, nws feem ntau ua rau muaj kev hloov pauv ntau ntxiv thiab tsim hluav taws xob ntxiv.
Feem ntau, engineers xav tias tus maub los yog lub luag haujlwm vim tias qhov ntawd yog qhov teeb meem tshwm sim. Nyob rau hauv qhov tseeb, lub transformer tsuas yog tsis muaj bandwidth xav tau rau daim ntawv thov hloov zaus. Xaiv lub transformer optimized rau qhov tseeb mem tes yam ntxwv es tsis yog nws lem ratio feem ntau daws tau qhov teeb meem.
Lwm qhov teeb meem peb ntsib ntau zaus yog kev cuam tshuam ntawm electromagnetic ntau dhau.
Ntau tus neeg siv khoom tiv tauj peb tom qab ua tsis tiav EMC kev sim, ntseeg tias lawv xav tau cov ntxaij lim dej loj dua lossis kev tiv thaiv ntxiv. Thaum cov kev daws teeb meem qee zaum pab, lub hauv paus ntawm lub suab nrov feem ntau nyob hauv lub transformer nws tus kheej. Tsis zoo winding kev npaj, ntau tus kab mob parasitic capacitance los yog siab heev inductance tuaj yeem ua rau tag nrho cov suab nrov hloov pauv tsis xav tau. Peb tau pom cov haujlwm uas hloov pauv tsuas yog cov qauv winding txo EMI txaus kom dhau daim ntawv pov thawj yam tsis hloov lwm qhov ntawm lub voj voog.
Overheating yog lwm lub cim ceeb toom uas yuav tsum tsis txhob raug ignored.
Tsis zoo li lub zog transformers, pulse transformers feem ntau hloov lub zog me me, yog li ntau tus engineers xav tias qhov kub thiab txias tsis tseem ceeb. Txawm li cas los xij, kev ua haujlwm siab - zaus tsim nws tus kheej cov nyom. Kev xaiv cov khoom siv ferrite tsis zoo, cov tub ntxhais poob ntau dhau los yog qhov tsis zoo ntawm kev tsim winding tuaj yeem maj mam ua haujlwm kub kom txog thaum rwb thaiv tsev pib laus ntxov ntxov. Lub tshuab hloov pauv tuaj yeem ua haujlwm txuas ntxiv rau lub hlis ua ntej qhov kev ua tsis tiav pib tshwm sim hauv thaj teb. Los ntawm qhov ntawd, lub hauv paus ua rau feem ntau nyuaj rau txheeb xyuas vim tias lub transformer tseem zoo li lub cev tsis zoo.
Kev puas tsuaj rwb thaiv tsev yog qhov tseem ceeb tshwj xeeb hauv kev tswj hwm kev lag luam, khoom siv kho mob thiab kev siv hluav taws xob siab -voltage switching applications. Pulse transformers nquag ua hauj lwm raws li hluav taws xob cais cov teeb meem ntawm qis-voltage control circuits thiab high-cov khoom siv hluav taws xob. Yog tias qhov rwb thaiv tsev zoo tsis zoo, qhov kev tshwm sim yuav dhau mus dhau qhov teeb meem zoo - lawv tuaj yeem cuam tshuam rau cov khoom siv kev nyab xeeb thiab kev cia siab ntev ntev -. Qhov no yog ib qho laj thawj uas peb muab qhov tseem ceeb rau cov ntaub ntawv rwb thaiv tsev, qhov kev ncua deb thiab Hi-Kev ntsuas lub lauj kaub thoob plaws hauv peb cov txheej txheem tsim khoom.
Mechanical vibration yog lwm qhov teeb meem uas feem ntau ua rau cov neeg siv khoom xav tsis thoob.
Txawm hais tias pulse transformers tsis muaj qhov txav ntawm cov khoom siv, kev hloov pauv sai sai ntawm cov hlau nplaum tsim microscopic rog hauv cov windings thiab ferrite core. Tshaj li ntau txhiab lub sijhawm ua haujlwm, cov kev vibrations no tuaj yeem tsim cov suab nrov nrov lossis maj mam hnav cov ntaub ntawv rwb thaiv tsev. Peb tau tshawb xyuas ntau lub tshuab hloov pauv qhov twg qhov kev ua tsis tiav tsis sib xws thaum kawg tau taug qab rov qab mus rau me ntsis txav hauv lub rooj sib txoos winding. Kev tsim nyog impregnation thiab ruaj ntseg core sib dhos ua rau txo qhov kev pheej hmoo no.
Tej zaum qhov teeb meem tsis to taub yog tsuas yog xaiv qhov tsis ncaj ncees lawm transformer rau daim ntawv thov.
Ob lub pulse transformers tej zaum yuav muaj qhov sib npaug ntawm qhov sib npaug, qhov ntev zoo sib xws thiab cov khoom siv hluav taws xob sib piv, tab sis ua tau txawv heev hauv qhov tseeb Circuit Court. Ib qho tuaj yeem ua kom zoo rau kev sib txuas lus Ethernet, lwm qhov rau MOSFET rooj vag tsav tsheb, thiab lwm qhov rau kev cais tawm digital. Hloov ib qho rau lwm tus vim tias lawv "zoo li" feem ntau qhia txog cov teeb meem uas nyuaj heev los kuaj xyuas tom qab.
Ntawm Wuxi Huipu Electronics Co., Ltd., peb tsis tshua pib daws teeb meem los ntawm kev nug txog lub tshuab hluav taws xob nws tus kheej. Xwb, peb nug txog lub Circuit Court. Dab tsi hloov zaus yog siv? Lub sijhawm nce siab yog dab tsi? Dab tsi yog qhov kev rho tawm hluav taws xob xav tau? Qhov tseeb waveform zoo li cas hauv qab load? Nkag siab txog qhov ua tiav qhov chaw ua haujlwm feem ntau qhia ntau dua li kev tshuaj xyuas lub tshuab hloov pauv ib leeg.
Ib yam uas peb tau pom ntau xyoo ntawm kev txhawb nqa OEM cov tuam txhab yog cov pulse transformers tsis tshua muaj kev poob vim yog kev tsim khoom tsis zoo. Ntau zaus, lawv ua tsis tiav vim lawv xav tias yuav ua rau sab nraud uas lawv tau tsim los ua ntej. Kev hloov pauv ntau dua, qhov kub thiab txias, qhov sib txawv ntawm cov neeg tsav tsheb yuav tsum tau los yog hloov kho PCB layouts tag nrho cov kev xav tau muab tso rau ntawm lub transformer.
Hmoov zoo, feem ntau ntawm cov teeb meem no tiv thaiv tau.
Xaiv cov khoom tsim nyog ferrite, optimizing winding qauv, tswj inductance inductance, txheeb xyuas waveform kev ua tau zoo thiab ua tiav kev ntsuam xyuas hluav taws xob thaum lub sij hawm tsim kho tshem tawm cov teeb meem feem ntau ua ntej cov khoom puas tau nkag mus rau ntau lawm.
Cov tshuab hluav taws xob txhim khu kev qha tshaj plaws uas peb tau ua haujlwm nrog txhua tus qhia ib tus yam ntxwv. Lawv cov neeg tsim qauv yeej tsis tau kho lub pulse transformer tsuas yog lwm qhov sib nqus ntawm cov khoom siv. Lawv nkag siab tias nws nyob ncaj qha ntawm kev tswj cov logic thiab lub zog hluav taws xob, ua siab ncaj nqa txhua qhov kev hloov pauv. Thaum lub teeb liab ntawd huv si, raug thiab hluav taws xob cais, tag nrho cov kev pab cuam. Thaum nws tsis ua, txawm tias cov khoom siv semiconductor tshaj plaws tau tawm tsam los them nyiaj.
Hauv cov khoom siv hluav taws xob niaj hnub no, kev daws teeb meem pulse transformer tsis yog hais txog kev hloov ib feem. Nws yog hais txog kev nkag siab txog lub luag haujlwm uas tivthaiv ua si hauv tus cwj pwm ntawm tag nrho cov circuit.