Dab tsi yog qhov txawv ntawm kev hloov fais fab mov thiab transformer
Lub luag haujlwm thiab kev faib tawm ntawm kev hloov hluav taws xob transformers
Ua ntej peb qhia txog kev hloov fais fab mov transformers, peb yuav tsum xub to taub lub tswv yim ntawm lub hwj chim transformers. Vim hais tias yav dhau los yog ib qho khoom siv nrog lub raj hloov pauv ntxiv rau lub zog hloov hluav taws xob, nws txoj haujlwm qub tsis tau hloov pauv. Txawm li cas los xij, cov haujlwm ntawm hom tshiab ntawm transformer no txawv heev ntawm cov transformers zoo tib yam. Feem ntau, hauv Circuit Court, hom transformer no tsis tsuas yog muaj qhov ua haujlwm ntawm cov khoom siv hluav taws xob zoo tib yam los hloov hluav taws xob, tab sis kuj muaj cov haujlwm ntawm kev sib cais ntawm rwb thaiv tsev thiab sib txuas hluav taws xob. Hom transformer no feem ntau yog siv los hloov cov khoom siv hluav taws xob ntawm ntau qhov hluav taws xob ntau zaus. Yog li dab tsi yog lub luag haujlwm tshwj xeeb ntawm cov khoom no? Nws kev faib tawm yog dab tsi?
Rau lub transformer, nws yog ib qho cuab yeej uas tuaj yeem hloov hluav taws xob. Feem ntau peb kuj hu nws lub hwj chim transformer. Tab sis qhov sib txawv ntawm qhov hloov hluav taws xob hloov pauv hloov pauv thiab lwm yam hloov pauv yog tias nws muaj ib qho kev hloov pauv ntau dua li qhov hloov pauv zoo tib yam. Nyob rau hauv no txoj kev, ib tug self-excited intermittent oscillator yog tsim, thiab nws muaj nuj nqi yog los kho cov input DC voltage mus rau ib tug high-frequency mem tes voltage thiab ces tso zis.
Ntxiv nrog rau cov haujlwm saum toj no, cov khoom no muaj lub luag haujlwm tseem ceeb dua, uas yog, kev sib kis thiab kev hloov pauv ntawm lub zog. Feem ntau, nyob rau hauv lub flyback Circuit Court, thaum peb tig rau ntawm lub raj hloov, qhov sib thooj transformer yuav hloov lub zog hluav taws xob mus rau hauv qhov chaw sib nqus thiab khaws cia. Thaum peb tua lub raj hloov, ces ntawm qhov tsis sib xws, cov hlau nplaum yuav hloov mus rau hauv hluav taws xob hluav taws xob.
Yog li yuav ua li cas nws ua haujlwm nyob rau hauv pem hauv ntej Circuit Court? Ua ntej ntawm tag nrho cov, thaum peb tig rau ntawm lub raj hloov, qhov cuam tshuam input voltage yuav raug siv los muab cov khoom thauj ncaj qha, thiab tib lub sijhawm, nws tseem yuav dhau los ntawm inductor. Khaws lub zog. Thaum peb disconnect lub hloov raj, ces lub zog hluav taws xob yuav raug xa mus rau lub load los ntawm lub zog cia inductance.
Thaum kawg, lub zog hloov hluav taws xob hloov pauv tuaj yeem hloov pauv qhov hluav taws xob DC xa mus rau hauv, kom nws tuaj yeem tso tawm qhov hluav taws xob tsawg ntawm ntau qhov ntau thiab tsawg. Peb tau tham txog nws txoj haujlwm tiav lawm, yog li nws qhov kev faib tawm yog dab tsi?
Feem ntau hais lus, kev hloov hluav taws xob hloov hluav taws xob tuaj yeem muaj ob pawg sib txawv, lawv yog ib leeg-zoo siab thiab ob-zoo siab. Ob lub taxonomies tau tsim sib txawv thiab ua haujlwm sib txawv heev. Ib hom excitation tuaj yeem nkag mus rau unipolar pulses, thiab tuaj yeem tso tawm rau pem hauv ntej thiab flyback voltages; Qhov txawv ntawm ob hom excitation yog tias nws inputs bipolar pulses, thiab feem ntau ntawm lawv tso zis bipolar mem tes voltages.
Los ntawm cov ntawv sau saum toj no, ntau tus phooj ywg muaj kev nkag siab txog kev hloov pauv. Rau kev hloov fais fab mov transformers, nws tsis yog tsuas yog qhov sib txawv ntawm kev ntxiv lub hwj chim hloov, qee qhov ntawm nws daim ntawv thov yog ntau dua. Tsis tas li ntawd, rau qee qhov kev siv tshwj xeeb, lub zog hloov hluav taws xob nrog cov cuab yeej no tuaj yeem ua qhov hloov pauv hluav taws xob raws li qhov xav tau, ua tiav cov txiaj ntsig ntawm kev ua tau raws li kev lag luam ntawm ntau hom kev xav tau voltage.
Kev suav txheej txheem ntawm High Frequency Transformer lem hauv Switching Fais Fab
Kev suav cov mis: N=0.4(l/d) mus rau lub zog thib ob. (N yog tus naj npawb ntawm lem, L yog qhov tseeb unit, luH=10 cubic. d-qhov nruab nrab txoj kab uas hla ntawm lub kauj (Cm).)
Piv txwv li, winding ib inductance coil ntawm L=0.04uH, noj qhov nruab nrab txoj kab uas hla d=0.8cm, ces tus naj npawb ntawm lem N=3 lem. Thaum xam tus nqi, tus lej hloov N yuav tsum loj dua me ntsis. Cov khoom tsim inductance tuaj yeem hloov kho nyob rau hauv qee qhov ntau.
Tus naj npawb ntawm cov xaim nyob rau hauv ib lub kauj tsis tas yuav yog tus naj npawb ntawm lem. Tsuas yog thaum tus naj npawb ntawm cov kab sib txuas sib npaug sib npaug rau 1, cov xov tooj ntawm cov xov hlau hauv ib lub kauj yog sib npaug rau cov lej ntawm cov kauj. Cov kev sib raug zoo yog raws li nram no: Tus naj npawb ntawm cov xov hlau nyob rau hauv ib lub kauj thiab cov xov tooj ntawm windings × tus naj npawb ntawm lem Cov xov hlau nyob rau hauv txhua lub qhov ntawm lub cev muaj zog stator txhais tau hais tias nyob rau hauv ib tug ib-txheej winding, tus xov tooj ntawm cov xov hlau nyob rau hauv txhua lub qhov. yog sib npaug rau tus naj npawb ntawm lem; nyob rau hauv ob-txheej winding, tus naj npawb ntawm cov xov hlau nyob rau hauv txhua lub qhov Cov xov tooj ntawm cov xov tooj yog ob zaug ntawm cov lem los yog 2x tus xov tooj ntawm lem.
1. High-frequency transformers yog tsuas yog siv raws li high-frequency switching zog transformers nyob rau hauv high-frequency switching fais fab mov, thiab kuj yog siv raws li high-frequency inverter zog transformers nyob rau hauv high-frequency inverter fais fab mov thiab high-frequency inverter vuam tshuab. Raws li kev ua haujlwm zaus, nws tuaj yeem muab faib ua ntau qib: 10kHz-50kHz, 50kHz-100kHz, 100kHz-500kHz, 500kHz-1MHz, thiab siab dua 10MHz.
2. Thaum tsim lub high-frequency transformer, cov xau inductance thiab faib capacitance ntawm lub transformer yuav tsum tau tsawg, vim hais tias lub high-frequency transformer nyob rau hauv lub switching fais fab mov kis ib tug high-frequency mem tes square wave teeb liab. Thaum lub sij hawm ib ntus txheej txheem ntawm kis tau tus mob, leakage inductance thiab faib capacitance yuav ua rau surge tam sim no thiab ncov voltage, raws li zoo raws li sab saum toj oscillation, ua rau kom poob.
