Inductors ụdị nkịtị,a na-ejikarị na kọmpụta na-agbanwe ike ọkụ na-enyocha akara nnyonye anya electromagnetic. N'ime nhazi bọọdụ, inductor nke a na-ahụkarị na-arụkwa ọrụ nke nzacha EMI, bụ nke a na-eji ebelata ụzarị apụta na ikuku ebili mmiri elektrọnik sitere na ahịrị mgbama ọsọ dị elu.
Dị ka akụkụ dị mkpa nke ihe ndọta, a na-eji inductor eme ihe na sekit eletriki ike. Ọ bụ akụkụ dị mkpa karịsịa na sekit ọkụ. Dị ka relays electromagnetic na akụrụngwa njikwa ụlọ ọrụ na mita ike eletrik (mita watt-hour) na sistemụ ike. Ihe nzacha na ntinye na njedebe mmepụta nke ịgbanye akụrụngwa ọkụ ọkụ, tuners na TV na-anata na njedebe na-ebufe, wdg niile enweghị ikewapụ na inductor. Isi ọrụ nke inductors na sekit eletrọnịkị bụ: nchekwa ike, nzacha, choke, resonance, wdg N'ime sekit ike, ebe ọ bụ na sekit na-ahụ maka nnyefe ike nke nnukwu mmiri ma ọ bụ nnukwu voltaji, inductor na-abụkarị "ụdị ike" inductors.
Kpọmkwem n'ihi na ike inductor dị iche na nke obere mgbaàmà nhazi inductor, topology nke ịgbanwee ike ọkọnọ dị iche iche n'oge imewe, na imewe usoro nwekwara onwe ya chọrọ, na-eme ka imewe ihe isi ike.Inductorsna sekit ndị na-enye ọkụ ugbu a ka a na-ejikarị maka nzacha, nchekwa ike, nnyefe ike, na mgbazi ihe ike. Nhazi inductor na-ekpuchi ọtụtụ akụkụ nke ihe ọmụma dị ka tiori electromagnetic, ihe ndọta, na ụkpụrụ nchekwa. Ndị na-emepụta ihe kwesịrị inwe nghọta doro anya banyere ọnọdụ ọrụ na ihe ndị metụtara paramita (dị ka ugbu a, voltaji, ugboro ugboro, mmụba okpomọkụ, ihe onwunwe, wdg) iji mee mkpebi. Kacha ezi uche imewe.
Nkewa nke inductors:
Enwere ike kewaa ndị inductor n'ime ụdị dị iche iche dabere na gburugburu ngwa ha, nhazi ngwaahịa, ọdịdị, ojiji, wdg. Ọtụtụ mgbe, mmepụta inductor na-amalite site na iji na ngwa ngwa dị ka mmalite. N'ịgbanwe ọkụ ọkụ, enwere ike kewaa inductor n'ime:
Nkịtị na ọnọdụ choke
Mmezi ihe kpatara ike - PFC Choke
Inductor jikọtara ọnụ (Coupler Choke)
Inductor nchekwa nchekwa ike (Smooth Choke)
Igwe Igwe Igwe Igwe Igwe Ọdụdọ (MAG AMP Coil)
Ndị na-ahụ maka ihe nzacha a na-ahụkarị na-achọ ka eriri abụọ ahụ nwee otu uru inductance, otu impedance, wdg, yabụ ụdị inductor a na-eji ụdị ihe atụ, na ụdị ha na-abụkarị TOROID, UU, ET na ụdị ndị ọzọ.
Otu inductor mode si arụ ọrụ:
A na-akpọkwa inductor ihe nzacha ọnọdụ nkịtị (nke a na-akpọkarị inductor mode ma ọ bụ CM.M.Choke) ma ọ bụ Line Filter.
Ndị na-ahụ maka ihe nzacha a na-ahụkarị na-achọ ka eriri abụọ ahụ nwee otu uru inductance, otu impedance, wdg, yabụ ụdị inductor a na-eji ụdị ihe atụ, na ụdị ha na-abụkarị TOROID, UU, ET na ụdị ndị ọzọ.
Otu inductor mode si arụ ọrụ:
A na-akpọkwa inductor ihe nzacha ọnọdụ nkịtị (nke a na-akpọkarị inductor mode ma ọ bụ CM.M.Choke) ma ọ bụ Line Filter.
N'imeịgbanwee ike ọkọnọ, n'ihi mgbanwe ngwa ngwa na nke ugbu a ma ọ bụ voltaji na diode rectifier, filter capacitor na inductor, a na-emepụta isi mmalite nnyonye anya electromagnetic (ụda). N'otu oge ahụ, enwekwara ụda harmonic dị elu karịa ike ugboro na ntinye ike ntinye. Ọ bụrụ na ewepụghị nnyonye anya ndị a, Mbelata ga-emebi akụrụngwa ibu ma ọ bụ ọkụ na-agbanwe n'onwe ya. Ya mere, ụlọ ọrụ na-ahụ maka nchekwa na mba dị iche iche enyela iwu gbasara nnyonye anya electromagnetic (EMI).
ụkpụrụ njikwa kwekọrọ. Ka ọ dị ugbu a, ngbanwe ugboro nke ịgbanye ọkụ ọkụ na-adịwanye elu, EMI na-aghọwanye njọ. Ya mere, a ga-etinye ihe nzacha EMI na ngbanwe ọkụ. Ihe nzacha EMI ga-ekpochapụ ma ọnọdụ nkịtị yana mkpọtụ ọnọdụ nkịtị iji mezuo ụfọdụ ihe achọrọ. ọkọlọtọ. Ihe nzacha ọnọdụ nkịtị na-ahụ maka ihicha akara ndabichi dị iche n'etiti ahịrị abụọ na ntinye ma ọ bụ njedebe mmepụta, na nzacha ọnọdụ nkịtị bụ maka nzacha akara ndabichi nkịtị n'etiti ahịrị ntinye abụọ ahụ. Enwere ike kewaa ndị inductor ụdị nkịtị ụzọ atọ: AC CM.M.CHOKE; DC CM.M.CHOKE na SIGNAL CM.M.CHOKE n'ihi ọnọdụ ọrụ dị iche iche. Ekwesịrị ịwapụta ha mgbe a na-emepụta ma ọ bụ na-ahọrọ. Mana ụkpụrụ ọrụ ya bụ otu ihe, dị ka egosiri na foto (1):
Dị ka e gosiri na foto a, eriri igwe abụọ nwere akụkụ dị iche na-emerụ ahụ n'otu mgbanaka magnetik. Dị ka aka nri spiral tube iwu, mgbe a dị iche iche mode voltaji na-abụghị polarity na otu mgbaama amplitude na-etinyere na ntinye ọnụ A na B, Mgbe , e nwere a ugbu i2 egosiri na siri ike akara, na a magnetik flux. Φ2 egosiri na ahịrị siri ike na-emepụta na isi magnetik. Ọ bụrụhaala na windings abụọ ahụ zuru oke, mgbanaka magnetik na ụzọ abụọ dị iche iche na isi magnetik na-akagbu ibe ha. Mkpokọta magnetik flux bụ efu, eriri igwe inductance fọrọ nke nta ka ọ bụrụ efu, na enweghị mmetụta mgbochi na mgbama ọnọdụ nkịtị. Ọ bụrụ na etinyere mgbaama ọnọdụ nkịtị nwere otu polarity na nha nha nha na ntinye ntinye A na B, a ga-enwe i1 dị ugbu a site na akara akara akara, na flux magnetik Φ1 nke akara akara akara ga-eme na magnetik. isi, mgbe ahụ magnetik flux na isi ga Ha nwere otu ntụziaka na-ewusi ibe ha ike, nke mere na inductance uru nke ọ bụla eriri igwe bụ ugboro abụọ nke mgbe ọ dị naanị, na XL = ωL. Ya mere, eriri igwe nke usoro ikuku a nwere mmetụta nkwụsị siri ike na nnyonye anya ọnọdụ nkịtị.
Ihe nzacha EMI n'ezie bụ L na C. Mgbe a na-emebe, a na-ejikọta ụdịdị dị iche iche na sekit suppression mode (dị ka egosiri na eserese 2). Ya mere, imewe ga-adabere na nha nke capacitor nzacha na ụkpụrụ nchekwa achọrọ. Ụkpụrụ na-eme mkpebi na ụkpụrụ inductor.
Na ọnụ ọgụgụ ahụ, L1, L2, na C1 na-etolite nzacha ọnọdụ nkịtị, na L3, C2, na C3 na-etolite nzacha ọnọdụ nkịtị.
Kere nke nkịtị Mode Inductor
Tupu ịmepụta inductor mode nkịtị, buru ụzọ lelee na eriri igwe ga-agbaso ụkpụrụ ndị a:
1 > N'okpuru ọnọdụ ọrụ nkịtị, magnetik core agaghị ejupụta n'ihi ike na-enye ugbu a.
2> Ọ ga-enwerịrị ihe mgbochi zuru oke maka nrịbama nnyonye anya dị elu, ụfọdụ bandwit, yana ihe mgbochi kacha nta maka mgbama dị ugbu a na oge ọrụ.
3>Okpomọkụ ọnụọgụ nke inductor kwesịrị ịdị ntakịrị, na ike nke kesara kwesịrị ịdị obere.
4> DC mgbochi kwesịrị ịdị obere ka o kwere mee.
5> Inductance induction kwesịrị ịdị ukwuu dịka o kwere mee, yana uru inductance kwesịrị ka ọ kwụsie ike.
6>Mkpuchi dị n'etiti windings ga-emezu ihe nchekwa chọrọ.
Usoro inductor ụkpụrụ a na-ahụkarị:
Nzọụkwụ 0 Nweta SPEC: EMI ekwe ọkwa, ọnọdụ ngwa.
Nzọụkwụ 1 Kpebie uru inductance.
Nzọụkwụ 2 A na-ekpebi isi ihe na nkọwapụta.
Nzọụkwụ 3 Kpebie ọnụ ọgụgụ nke ntụgharị ikuku na dayameta waya.
Nzọụkwụ 4 Ngosipụta
Nzọụkwụ 5 Nwale
Ihe atụ imewe
Kwụpụ 0: sekit filter EMI dị ka egosiri na eserese 3
CX = 1.0 Uf Cy = 3300PF EMI larịị: Fcc Klas B
Ụdị: Ac Common Mode Choke
Kwụpụ 1: Kpebie inductance (L):
Enwere ike ịhụ site na eserese sekit na mgbama ọnọdụ nkịtị na-ebelata site na nzacha ọnọdụ nkịtị nke L3, C2 na C3 mejupụtara. N'ezie, L3, C2, na C3 na-etolite sekit abụọ nke LC, nke na-etinye mkpọtụ nke ahịrị L na N n'otu n'otu. Ọ bụrụhaala na a na-ekpebi oge nkwụsị nke sekit nzacha ma mara capacitance C, enwere ike nweta inductance L site na usoro a.
fo=1/(2π√LC)L → 1/(2πfo)2C
Ọtụtụ mgbe, EMI ule bandwit bụ dị ka ndị a:
nnyonye anya emere: 150KHZ → 30MHZ (Cheta: VDE ọkọlọtọ 10KHZ - 30M)
nnyonye anya radieshon: 30MHZ 1GHz
Ihe nzacha n'ezie enweghị ike nweta oke mgbochi mgbochi nke ezigbo nzacha, yana enwere ike ịtọ oge nkwụsịtụ na gburugburu 50KHZ. N'ebe a, na-eche na = 50KHZ, mgbe ahụ
L = 1/ (2πfo) 2C = 1/ [( 2*3.14*50000)2 *3300*10-12] = 3.07mH
L1, L2, na C1 na-etolite nzacha ọnọdụ (dị obere ngafe). Ike dị n'etiti ahịrị bụ 1.0uF, yabụ inductance nkịtị bụ:
L = 1/ [( 2*3.14*50000)2 *1*10-6] = 10.14uH
N'ụzọ dị otú a, enwere ike nweta uru inductance chọrọ n'ụzọ doro anya. Ọ bụrụ na ịchọrọ ịnweta ugboro ole mbelata dị ala fo, ị nwere ike ịbawanye uru inductance ọzọ. Oge nkwụsị n'ozuzu abụghị ihe na-erughị 10KHZ. N'ụzọ doro anya, ka inductance dị elu, ọ na-eme ka mmetụta nkwụsị EMI dịkwuo mma, ma ọnyà dị elu nke ukwuu ga-eme ka nkwụsị nkwụsị ahụ dịkwuo ala, na nzacha n'ezie nwere ike nweta naanị brọdband, nke na-eme ka mmetụta nkwụsị nke ụda ụda dị elu ka njọ (n'ozuzu ya). Akụkụ mkpọtụ nke ọkụ ọkụ na-agbanwe bụ ihe dịka 5 ~ 10MHZ, mana enwere ikpe ebe ọ gafere 10MHZ). Tụkwasị na nke ahụ, ka inductance dị elu, ka ọ na-atụgharị na winding nwere, ma ọ bụ na-eme ka ui nke CORE dị elu, nke ga-eme ka nkwụsịtụ dị ala na-abawanye (DCR na-ebuwanye ibu). Ka ọnụ ọgụgụ nke ntụgharị na-abawanye, ike nke kesara na-abawanye (dị ka egosiri na foto 4), na-ekwe ka mmiri niile dị elu na-agafe site na ike a. UI dị elu nke ukwuu na-eme ka CORE jujuo ngwa ngwa, yana ọ dịkwa oke ike yana ọnụ ahịa imepụta ya.
Nzọụkwụ 2 Kpebie ihe CORE na SIZE
Site na ihe ndị a chọrọ n'elu, anyị nwere ike ịmara na onye na-ahụ maka ọnọdụ nkịtị kwesịrị ịdị ike iji saturate, ya mere ọ dị mkpa ịhọrọ ihe nwere obere akụkụ BH. N'ihi na a chọrọ uru inductance dị elu, uru ui nke magnetik core ga-adịkwa elu, ọ ga-enwekwa ike inwe obere mfu isi na uru Bs dị elu, Mn-Zn ferrite material CORE bụ ihe kachasị mma CORE nke na-ezute n'elu chọrọ.
Enweghị ụkpụrụ ụfọdụ na COEE SIZE n'oge imewe. N'ụkpụrụ, ọ ga-achọ naanị imezu inductance achọrọ ma wedata nha nke ngwaahịa emebere n'ime oke mfu obere oge enwere ike.
Ya mere, a ga-enyocha ihe CORE na mmịpụta SIZE dabere na ọnụ ahịa, ọnwụ kwere ekwe, oghere ntinye, wdg. Ihe a na-ejikarị eme ihe nke CORE inductor mode dị n'etiti 2000 na 10000. Iron Powder Core nwekwara obere mfu ígwè, nnukwu Bs na ala dị ala. BH angle ratio, mana ui ya dị ala, ya mere, a naghị eji ya eme ihe na inductor mode, mana ụdị isi a bụ otu n'ime inductor mode. Ngwa ndị ahọrọ.
Nzọụkwụ 3 Kpebie ọnụọgụ ntụgharị N na dayameta waya dw
Buru ụzọ chọpụta nkọwapụta nke CORE. Dịka ọmụmaatụ, na ihe atụ a, T18 * 10 * 7, A10, AL = 8230± 30%, wee:
N = √L / AL = √(3.07*106) / (8230*70%) = 23 TS
Dayameta waya dabere na njupụta ugbu a nke 3 ~ 5A/mm2. Ọ bụrụ na ohere na-enye ohere, enwere ike ịhọrọ njupụta dị ugbu a dị ka o kwere mee. Were ya na ntinye ugbu a I i = 1.2A na ihe atụ a, were J = 4 A/mm2
Mgbe ahụ Aw = 1.2 / 4 = 0.3 mm2 Φ0.70 mm
A ghaghị ịnwale ụdị inductor nkịtị site na nlele n'ezie iji gosipụta ntụkwasị obi nke imewe ahụ, n'ihi na ọdịiche dị na usoro nrụpụta ga-edugakwa na ọdịiche dị na paramita inductor ma na-emetụta mmetụta nzacha. Dịka ọmụmaatụ, mmụba nke ikesa ikesa ga-eme ka ụda ụda dị elu. Ọ dị mfe ibufe. The asymmetry nke abụọ windings na-eme ka ndị dị iche na inductance n'etiti abụọ otu ibu, akpụ a ụfọdụ impedance na nkịtị mode mgbaama.
Nchịkọta
1 > Ọrụ nke inductor mode na-emekarị bụ ikpochapụ ụda ọnọdụ nkịtị na ahịrị. Nhazi ahụ na-achọ ka ikuku abụọ ahụ nwee nhazi zuru oke na otu ihe eletrik.
2 > Ikesa ikesa nke inductor mode nkịtị na-enwe mmetụta na-adịghị mma n'ịkwụsị ụda ugboro ugboro na ekwesịrị ibelata.
3>Uru inductance nke inductor mode nkịtị na-ejikọta ya na ụda mkpọtụ mkpọtụ nke achọrọ ka enyocha ya na ike dakọtara. Uru inductance na-abụkarị n'etiti 2mH ~ 50mH.
Isi mmalite edemede: Ebigharịrị ya site na ịntanetị
Xuange e hiwere na 2009. Theelu na ala ugboro ngbanwe, inductors naIkanam mbanye ike ọkọnọemepụtara na-eji ọtụtụ ebe n'ji ike onunu, ulo oru ike onunu, ọhụrụ ike onunu, LED ike onunu na ndị ọzọ ọrụ.
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