Nyocha nke inductor ugbu a| DỊKWA MMA

Nhazi nke inductor na-ewetara ndị injinia ọtụtụ ihe ịma aka n'ichepụta mgbanwe ọkụ. Ndị injinia kwesịrị ọ bụghị naanị ịhọrọ uru inductance, kamakwa tụlee ihe dị ugbu a nke onye inductor nwere ike iburu, nguzogide ikuku, nha igwe na ihe ndị ọzọ. Mmetụta DC dị ugbu a na inductor, nke ga-enyekwa ozi dị mkpa maka ịhọrọ inductor kwesịrị ekwesị.

Ghọta ọrụ nke inductor

A na-aghọtakarị inductor dị ka L na sekit nzacha LC na mmepụta nke ọkụ ọkụ na-agbanwe (C bụ mmepụta capacitor). Ọ bụ ezie na nghọta a ziri ezi, ọ dị mkpa inwe nghọta miri emi banyere omume nke inductor iji ghọta nhazi nke inductor.

Na ntughari mgbada, otu njedebe nke inductor na-ejikọta na voltaji mmepụta DC. A na-ejikọta njedebe nke ọzọ na voltaji ntinye ma ọ bụ GND site na ngbanwe ugboro ugboro.

The inductor jikọọ na ntinye voltaji site MOSFET, na inductor jikọọ na GND. N'ihi iji ụdị njikwa a, inductor nwere ike ịdakwasị n'ụzọ abụọ: site na diode grounding ma ọ bụ site MOSFET grounding. Ọ bụrụ na ọ bụ ụzọ ikpeazụ, a na-akpọ onye ntụgharị ahụ "synchronus" mode.

Ugbu a tụlee ọzọ ma ọ bụrụ na nke ugbu a na-erute site inductor na abụọ ndị a na-ekwu na-agbanwe. A na-ejikọta otu njedebe nke inductor na ntinye ntinye na njedebe nke ọzọ na-ejikọta ya na voltaji mmepụta. Maka onye ntụgharị na-agbada ala, ntinye voltaji ga-adị elu karịa mmepụta voltaji, ya mere a ga-emepụta ụda voltaji dị mma na inductor. N'ụzọ megidere nke ahụ, n'oge steeti 2, otu njedebe nke inductor nke ejikọrọ na ntinye voltaji na-ejikọta na ala. Maka onye ntụgharị na-agbada ala, voltaji mmepụta ga-adị mma, ya mere a ga-emepụta ụda volta na-adịghị mma na inductor.

Ya mere, mgbe voltaji na inductor dị mma, ihe dị ugbu a na inductor ga-abawanye; mgbe voltaji na inductor adịghị mma, ihe dị ugbu a na inductor ga-ebelata.

Enwere ike ileghara mgbada na voltaji nke inductor ma ọ bụ mgbada voltaji na-aga n'ihu nke Schottky diode na sekit asynchronous ma e jiri ya tụnyere voltaji ntinye na mmepụta.

Saturation nke inductor isi

Site na ọnụ ọgụgụ kasị elu nke inductor nke a gbakọrọ, anyị nwere ike ịchọta ihe a na-emepụta na inductor. Ọ dị mfe ịmara na ka ihe dị ugbu a site na inductor na-abawanye, inductance ya na-ebelata. A na-ekpebi nke a site na njirimara anụ ahụ nke ihe isi ihe magnetik. Ego ole inductance ga-ebelata dị mkpa: ọ bụrụ na a na-ebelata inductance nke ukwuu, onye ntụgharị agaghị arụ ọrụ nke ọma. Mgbe ihe dị ugbu a na-agafe na inductor dị ukwuu nke na inductor dị irè, a na-akpọ nke ugbu a "saturation current". Nke a bụkwa ihe ndabere nke inductor.

N'ezie, inductor ike ịgbanwee na ntụgharị ntụgharị mgbe niile nwere saturation "dị nro". Mgbe nke ugbu a na-abawanye ruo n'ókè ụfọdụ, inductance agaghị ebelata nke ọma, nke a na-akpọ njirimara saturation "dị nro". Ọ bụrụ na nke ugbu a na-abawanye ọzọ, inductor ga-emebi. Mbelata nke inductance dị n'ọtụtụ ụdị inductor.

Na nke a dị nro saturation atụmatụ, anyị nwere ike mara ihe mere opekempe inductance n'okpuru DC mmepụta ugbu a na-kpọmkwem na niile converters, na mgbanwe nke ripple ugbu a agaghị oké emetụta inductance. N'ime ngwa niile, a na-atụ anya na ripple ugbu a dị ntakịrị dị ka o kwere mee, n'ihi na ọ ga-emetụta ụda nke mmepụta voltaji. Nke a bụ ya mere ndị mmadụ na-enwe nchegbu mgbe nile banyere inductance n'okpuru mmepụta ugbu a nke DC na-eleghara inductance n'okpuru ripple ugbu a na Spec.

Ihe dị n'elu bụ mmalite nke nyocha inductor ugbu a, ọ bụrụ na ịchọrọ ịmatakwu banyere inductor, biko nweere onwe gị ịkpọtụrụ anyị.