Uma imvamisa yokushintsha ye-transformer iphakeme, ivolumu yayo incane. Ngakho-ke, kusho ukuthi akukho mkhawulo ophezulu wemvamisa yokushintsha? Ngakho-ke, ingabe ivolumu ingaba ncane kakhulu?
Impendulo iwukungavumi. Enkambisweni yokusebenza yangempela, imvamisa yama-transformer anemvamisa ephezulu inqunywa yizici eziningi futhi ingahlukaniswa ngezici eziningana:
1、 I-topology yesekethe ye-flyback: Ama-Transformers anemisebenzi yokugcina amandla nokuguqulwa, ngemvamisa yokusebenza evame ukusetshenziswa engu-40-100kHz. Uma imvamisa ingaphansi kuka-40kHz, ivolumu ye-iron core inkulu kakhulu, okuholela kumthamo omkhulu wokunikezwa kwamandla; Uma imvamisa idlula i-100kHz, ukuphakama kwamandla kagesi okubangelwa ukuvuza kwe-inductance kungalimaza i-transistor eshintshayo.
I-topology Eyaphambili: Ububanzi obuvamile bungu-60-150kHz, kodwa kudinga ukulinganisela ukulahlekelwa kwe-magnetic core kanye nokulahlekelwa kwe-switch. I-Push pull/half bridge/full bridge topology: I-symmetrical switch driven bidirectional magnetized magnetic core, esebenza kahle kakhulu, isekela amaza aphezulu asukela kumakhulu e-kHz kuya ku-MHz, kodwa idinga ukwakheka kokulawula okuyinkimbinkimbi kakhulu kanye nokushabalaliswa kokushisa.
2、 Izici zezinto eziyinhloko yamagnetic zifaka phakathi ukulahlekelwa yi-magnetic hysteresis kanye nokulahlekelwa yi-eddy current. Ngaphakathi kobubanzi obuthile, ukulahlekelwa yi-magnetic core kuyanda ngokwanda kwemvamisa. Ngakho-ke, izinto eziyinhloko yamagnetic ezahlukene kufanele zibe nebanga lokusetshenziswa kwemvamisa ehlukene ukuqinisekisa ukulahlekelwa yi-magnetic core okuphansi. Isibonelo, i-manganese zinc ferrite ifanele ukusetshenziswa kumaza asukela ku-10 kuya ku-300kHz, kuyilapho i-nickel zinc ferrite ifanele ukusetshenziswa kumaza angaphezu kwe-1MHz.
Okwesibili, njengoba imvamisa ikhula, ukuqina okuphezulu kokungeniswa kwamandla kazibuthe kudinga ukuncishiswa ukuze kugwenywe ukugcwala komongo kazibuthe. Isibonelo, ukuqina kokungeniswa kwamandla kazibuthe kwe-DMR40 kungu-0.38T, futhi lapho siklama ngemvamisa engu-100KHz, sivame ukuthatha inani elicishe libe ngu-0.2T.
3. Isivinini sokushintsha idivayisi yamandla i-MOS transistor ingeyamadivayisi e-unipolar, enesikhathi sokuvala kumasekhondi amancane. Imvamisa yokusebenza yethiyori ingafinyelela i-MHz, kanti imvamisa yokusebenza ephezulu kakhulu ingamakhulu amaningana e-KHz. I-IGBT ingeyamadivayisi e-bipolar, enesikhathi sokuvala eside kanye nemvamisa yokusebenza ephezulu ngokuvamile ephakathi kuka-40~50KHz.
4、 Ukwanda kokusebenza kahle kanye nemvamisa yokushabalalisa ukushisa kuholela ekwandeni kokulahlekelwa yiswishi kanye nedrayivu, okuholela ekwehleni kokusebenza kahle okuphelele kanye nokwanda kokukhiqizwa kokushisa. Ukuze siqinisekise ukuthi izinga lokushisa lomkhiqizo lingaphakathi kwebanga elijwayelekile, sidinga izinyathelo ezengeziwe zokubhekana nokushabalalisa ukushisa.
5、 Emafrikhwensini aphezulu, izindleko ziyanda ngenxa yokulahlekelwa okukhulu kweswishi, okudinga izinyathelo ezengeziwe zokusingatha ukushabalaliswa kokushisa, okuholela ekwandeni kwezindleko. Okwesibili, ama-capacitor nama-inductor avame ukubhekana nokuwohloka kokusebenza kumafrikhwensi aphezulu, futhi sidinga ukukhetha amadivayisi afanele amafrikhwensi aphezulu, okwandisa izindleko. Ekwakhiweni okusebenzayo, izindleko zilinganiselwe, okuvame ukunquma umkhawulo ophezulu wefrikhwensi yokusebenza.
6, Izici ze-Chip: Ama-chip okulawula e-PWM avame ukuba nezidingo zomkhawulo ophezulu wemvamisa ukuze aphendule ekulungisweni komthwalo oguquguqukayo. Lokhu futhi kunquma ukuthi imvamisa yokushintsha ye-transformer ingaphakathi kwebanga elithile.
Isikhathi sokuthunyelwe: Agasti-06-2025
