Ka ugboro mgbanwe nke transformer dị elu, otú ahụ ka olu ya na-ebelata. Ya mere, ọ pụtara na enweghị oke elu na ugboro mgbanwe? Ya mere, olu ya ọ̀ dị obere nke ukwuu?
Azịza ya bụ ihe na-adịghị mma. N'ime usoro ọrụ ahụ n'ezie, a na-ekpebi ugboro ole nke transformers ugboro ugboro dị elu site na ọtụtụ ihe ma enwere ike kewaa ya n'ọtụtụ akụkụ:
1, Usoro nhazi sekit flyback topology: Transformers nwere ọrụ nke nchekwa ike na mgbanwe, yana ugboro ọrụ a na-ejikarị eme ihe nke 40-100kHz. Mgbe ugboro dị n'okpuru 40kHz, olu nke isi ígwè ahụ buru ibu nke ukwuu, na-ebute nnukwu olu ọkọnọ ike; Mgbe ugboro karịrị 100kHz, mmụba voltaji nke inductance na-akpata nwere ike imebi transistor mgbanwe.
Nhazi elu: Oke a na-ahụkarị bụ 60-150kHz, mana ọ chọrọ ịhazi mfu isi magnetik na mfu switch. Nhazi elu/ọkara akwa mmiri/full bridge: Nhazi magnetik magnetik nke nwere ike ịrụ ọrụ nke ọma, nke na-akwado ugboro ole dị elu site na narị kHz ruo MHz, mana ọ chọrọ nhazi njikwa dị mgbagwoju anya na mfu okpomọkụ.
2、 Àgwà nke ihe ndị dị n'ime magnetik gụnyere mfu hysteresis magnetik na mfu eddy current. N'ime oke ụfọdụ, mfu isi magnetik na-abawanye ka ugboro ole na ole na-abawanye. Ya mere, ihe dị iche iche dị n'ime magnetik kwesịrị inwe oke ugboro ole dị iche iche iji hụ na mfu isi magnetik dị obere. Dịka ọmụmaatụ, manganese zinc ferrite dị mma maka ojiji na ugboro ole sitere na 10 ruo 300kHz, ebe nickel zinc ferrite dị mma maka ojiji na ugboro ole karịrị 1MHz.
Nke abụọ, ka ugboro ole na-abawanye, a ga-ebelata ike ndọta kachasị elu iji zere imeju nke isi ndọta. Dịka ọmụmaatụ, ike ndọta nke DMR40 bụ 0.38T, mgbe anyị na-emepụta ya na ugboro ole nke 100KHz, anyị na-ewerekarị uru nke ihe dị ka 0.2T.
3, Ọsọ mgbanwe ngwaọrụ ike MOS transistor bụ nke ngwaọrụ otu polar, yana oge gbanyụọ na nanoseconds. Ugboro ọrụ nke usoro echiche nwere ike iru MHz, oke ugboro ọrụ kachasị bụ ọtụtụ narị KHz. IGBT bụ nke ngwaọrụ bipolar, yana oge gbanyụọ dị ogologo yana ugboro ọrụ kachasị dị n'etiti 40 ~ 50KHz.
4、 Mmụba nke arụmọrụ na ugboro ugboro nke okpomọkụ na-eduga na mmụba nke mfu swiichi na draịva, na-ebute mbelata na arụmọrụ zuru oke na mmụba na mmepụta okpomọkụ. Iji hụ na okpomọkụ nke ngwaahịa ahụ dị n'ime oke nkịtị, anyị chọrọ usoro ndị ọzọ iji lụso mgbasa okpomọkụ ọgụ.
5、 N'oge dị elu, ọnụ ahịa na-abawanye n'ihi mmụba nke mfu switch, nke chọrọ ọtụtụ ihe iji jikwaa mfu okpomọkụ, na-eduga na mmụba na ọnụ ahịa. Nke abụọ, capacitors na inductor na-enwekarị mmebi arụmọrụ na ugboro dị elu, anyị kwesịkwara ịhọrọ ngwaọrụ ndị dabara adaba maka ugboro dị elu, nke na-eme ka ọnụ ahịa dịkwuo elu. Na nhazi bara uru, ọnụ ahịa dị oke, nke na-ekpebikarị oke elu nke ugboro ọrụ.
6, Njirimara Chip: Mpekere njikwa PWM na-enwekarị ihe achọrọ maka oke oke ugboro ugboro iji meghachi omume na mgbanwe ibu dị ike. Nke a na-ekpebikwa na ugboro mgbanwe nke transformer dị n'ime oke ụfọdụ.
Oge ozi: Ọgọst-06-2025
