Ọrụ nke ihe ngosi kristal mmiri mmiri na-egosipụta ike inye ọkụ bụ iji tọghata ike 220V mains n'ime mmiri dị iche iche kwụsiri ike chọrọ maka ọrụ ngosipụta kristal mmiri, yana inye voltaji na-arụ ọrụ maka sekit njikwa dị iche iche, mgbagha mgbagha, ogwe njikwa, wdg. na ngosipụta kristal mmiri mmiri, yana nkwụsi ike ya na-arụ ọrụ Ọ na-emetụta ozugbo ma ihe nleba anya LCD nwere ike ịrụ ọrụ nke ọma.
1. Ọdịdị nke mmiri mmiri kristal ngosipụta ike ọkọnọ circuit
Igwe ihe ngosi kristal mmiri mmiri na-enye ike na-ebunye 5V, voltaji na-arụ ọrụ 12V.N'ime ha, voltaji 5V na-enye voltaji na-arụ ọrụ maka sekit mgbagha nke isi osisi na ọkụ na-egosi na panel ọrụ;12V voltaji tumadi na-enye voltaji na-arụ ọrụ maka nnukwu voltaji osisi na ụgbọ ala ụgbọ ala.
Sekit ike bụ nke mejupụtara sekit nzacha, bridge rectifier filter circuit, sekit isi mgba ọkụ, ntụgharị ntụgharị, sekit nzacha nzacha, sekit nchebe, sekit mmalite dị nro, onye njikwa PWM na ndị ọzọ.
N'ime ha, ọrụ nke AC nzacha sekit bụ ikpochapụ elu-ugboro nnyonye anya na mains (linear filter circuit bụ n'ozuzu mejupụtara resistors, capacitors na inductor);Ọrụ nke sekit rectifier nzacha akwa bụ ịtụgharị 220V AC ka ọ bụrụ 310V DC;mgba ọkụ sekit Ọrụ nke rectification filter circuit bụ iji tọghata DC ike nke banyere 310V site ịmafe tube na ịmafe transformer n'ime usu voltaji nke dị iche iche amplitudes;ọrụ nke sekit nzacha nzacha bụ iji tọghata mmepụta voltaji pulse site na ntụgharị ntụgharị n'ime voltaji bụ isi nke 5V chọrọ site na ibu mgbe emezigharị na nzacha na 12V;Ọrụ nke sekit nchebe overvoltage bụ iji zere mmebi nke tube ntụgharị ma ọ bụ ọkụ ọkụ na-agbanwe site na ibu na-adịghị mma ma ọ bụ ihe ndị ọzọ;Ọrụ nke onye na-ahụ maka PWM bụ ịchịkwa ngbanwe nke tube na-agbanwe ma na-achịkwa sekit dị ka nzaghachi nzaghachi nke sekit nchebe.
Nke abụọ, ụkpụrụ na-arụ ọrụ nke mmiri mmiri kristal ngosi ike ọkọnọ circuit
Igwe ọkụ eletrik nke ngosipụta kristal mmiri mmiri na-anabatakarị ọnọdụ sekit mgbanwe.Sekit ọkọnọ ike a na-atụgharị voltaji ntinye AC 220V ka ọ bụrụ voltaji DC site na sekit ndozi na nzacha, wee bechapụ ya site na tube na-atụgharị wee gbadaa site na igwe ngbanwe dị elu iji nweta voltaji akụkụ anọ dị elu.Mgbe emezigharị na nzacha, a na-arụpụta voltaji DC nke modul ọ bụla nke LCD chọrọ.
Ihe na-esonụ na-ewe AOCLM729 mmiri mmiri kristal ngosi dị ka ihe atụ iji kọwaa ụkpụrụ ọrụ nke mmiri mmiri crystal ngosi sekit ọkọnọ ike.The ike sekit nke AOCLM729 mmiri mmiri kristal ngosi bụ tumadi mejupụtara AC filter sekit, àkwà mmiri rectifier sekit, soft mmalite sekit, isi mgba ọkụ sekit, rectifier filter circuit, overvoltage nchebe circuit na na.
Foto anụ ahụ nke bọọdụ sekit ike:
Eserese atụmatụ nke sekit ike:
- sekit filter AC
Ọrụ nke sekit nzacha AC bụ ikpochapụ mkpọtụ nke eriri ntinye AC webatara wee kwụsị mkpọtụ nzaghachi na-ebute n'ime ọkụ ọkụ.
Mkpọtụ dị n'ime ọkụ ọkụ na-agụnyekarị mkpọtụ ọnọdụ na mkpọtụ nkịtị.Maka ọkụ ọkụ otu nkeji, enwere wires ike AC 2 na waya ala 1 n'akụkụ ntinye.Mkpọtụ a na-eme n'etiti eriri ọkụ AC abụọ na waya ala n'akụkụ ntinye ike bụ ụda nkịtị;mkpọtụ a na-eme n'etiti ahịrị ọkụ AC abụọ bụ mkpọtụ nkịtị.A na-ejikarị sekit nzacha AC na-ekpochapụ ụdị mkpọtụ abụọ a.Na mgbakwunye, ọ na-ejekwa ozi dị ka nchebe overcurrent sekit na overvoltage nchebe.N'ime ha, a na-eji fuse maka nchebe na-agafe agafe, a na-ejikwa varistor maka nchebe ntinye voltaji.Ọnụ ọgụgụ dị n'okpuru bụ schematic eserese nke sekit filter AC.
N'ọnụọgụ a, inductors L901, L902, na capacitors C904, C903, C902, na C901 na-etolite nzacha EMI.A na-eji ndị inductor L901 na L902 na-enyocha mkpọtụ nkịtị ugboro ugboro;A na-eji C901 na C902 na-enyocha mkpọtụ nkịtị ugboro ugboro;A na-eji C903 na C904 na-enyocha ụda mkpọtụ na-adịkarị elu ugboro ugboro na ụda nkịtị (nnyonye anya electromagnetic ugboro ugboro);A na-eji resistor na-amachi ugbu a R901 na R902 iji wepụta capacitor mgbe ewepụghị plọg ọkụ;A na-eji mkpuchi F901 maka nchebe na-agafe agafe, na varistor NR901 ka a na-eji maka nchebe ntinye voltaji.
Mgbe etinyere plọg nke ihe ngosi kristal mmiri n'ime oghere ike, 220V AC na-agafe fuse F901 na varistor NR901 iji gbochie mmetụta ịwa ahụ, wee gafee sekit nke mejupụtara capacitors C901, C902, C903, C904, resistors R901, R902, na inductor L901, L902.Tinye sekit rectifier akwa mgbe sekit mgbochi nnyonye anya.
2. Bridge rectifier filter circuit
Ọrụ nke sekit rectifier nzacha akwa bụ ịtụgharị 220V AC ka ọ bụrụ voltaji DC mgbe ndozigharị zuru oke, wee gbanwee voltaji ahụ n'ime voltaji okpukpu abụọ nke isi mgbe nzachachara.
Ihe mejupụtara sekit nzacha akwa akwa bụ nke DB901 rectifier na nzacha capacitor C905..
N'ọnụọgụ a, ihe nrụzi akwa mmiri nwere diode 4 rectifier, na capacitor nzacha bụ capacitor 400V.Mgbe a na-enyocha 220V AC mains, ọ na-abanye na rectifier akwa mmiri.Mgbe ihe nrụzi akwa akwa rụchara nrụzi zuru oke na igwe AC, ọ na-aghọ voltaji DC.Mgbe ahụ, a na-agbanwe voltaji DC ka ọ bụrụ voltaji 310V DC site na nzacha capacitor C905.
3. sekit mmalite dị nro
Ọrụ nke sekit mmalite dị nro bụ igbochi mmetụta ozugbo dị ugbu a na capacitor iji hụ na ọrụ nkịtị na ntụkwasị obi nke ọkụ ọkụ na-agbanwe.Ebe ọ bụ na voltaji mbụ na capacitor bụ efu n'oge a na-agbanye sekit ntinye, a ga-emepụta nnukwu inrush ozugbo, na nke a ugbu a na-emekarị ka ntinye ntinye na-agbapụ, ya mere, sekit mmalite dị nro kwesịrị. ịtọọ.Sekit mmalite dị nro na-abụkarị nke mmalite resistors, diode rectifier, na nzacha capacitors.Dị ka e gosiri na ọnụ ọgụgụ a bụ schematic eserese nke sekit mmalite dị nro.
Na ọnụ ọgụgụ, ndị resistors R906 na R907 bụ otu resistors nke 1MΩ.Ebe ọ bụ na ndị resistors ndị a nwere nnukwu uru nguzogide, ọrụ ugbu a ha dị ntakịrị.Mgbe ọkụ ọkụ ka malitere, mmalite na-arụ ọrụ ugbu a nke SG6841 chọrọ na-agbakwunye na ntinye ntinye (pin 3) nke SG6841 mgbe 300V DC voltaji dị elu gbadara site na resistors R906 na R907 iji ghọta mmalite dị nro. .Ozugbo tube na-atụgharị gaa n'ọnọdụ ọrụ nkịtị, a na-emezigharị voltaji dị elu nke etinyere na ntụgharị mgbanwe site na diode rectifier D902 na nzacha capacitor C907, wee bụrụ voltaji na-arụ ọrụ nke mgbawa SG6841, na mmalite- usoro elu agwụla.
4. sekit mgba ọkụ isi
Ọrụ nke sekit mgba ọkụ bụ isi bụ ịnweta voltaji ebili mmiri dị elu nke akụkụ anọ site na ịgbanye tube na-egbutu na ihe ntụgharị dị elu na-agbadata.
Isi sekit na-agbanwe agbanwe bụ nke na-atụgharị tube, onye na-ahụ maka PWM, onye na-agbanwe agbanwe, sekit nchebe overcurrent, sekit nchebe elu voltaji na ihe ndị ọzọ.
Na ọnụ ọgụgụ ahụ, SG6841 bụ onye na-ahụ maka PWM, nke bụ isi nke ọkụ ọkụ na-agbanwe.Ọ nwere ike ịmepụta mgbaàmà ịnya ụgbọ ala nke nwere oge a kapịrị ọnụ yana obosara obosara na-agbanwe agbanwe, ma na-achịkwa ọnọdụ nkwụsị nke tube ntụgharị, si otú ahụ na-edozi voltaji mmepụta iji nweta nzube nke nkwụsịtụ voltaji..Q903 bụ tube na-agbanwe agbanwe, T901 bụ onye na-agbanwe agbanwe, na sekit nke mejupụtara voltaji regulator tube ZD901, resistor R911, transistors Q902 na Q901, na resistor R901 bụ sekit nchebe overvoltage.
Mgbe PWM malitere ịrụ ọrụ, pin 8th nke SG6841 na-ewepụta ebili mmiri akụkụ anọ (n'ozuzu ugboro nke pulse mmepụta bụ 58.5kHz, na ọrụ ọrụ bụ 11.4%).Ụkụ ahụ na-achịkwa tube na-agbanwe Q903 iji rụọ ọrụ mgbanwe dịka oge ọrụ ya si dị.Mgbe ịgbanwuo tube Q903 na-aga n'ihu na-agbanye / gbanyụọ ka ọ bụrụ oscillation nke onwe ya, ihe ntụgharị T901 na-amalite ịrụ ọrụ ma na-emepụta voltaji oscillating.
Mgbe njedebe mmepụta nke pin 8 nke SG6841 dị elu, a na-agbanye tube na-atụgharị Q903, mgbe ahụ, eriri isi nke ihe ntụgharị T901 nwere ugbu a na-agafe na ya, nke na-emepụta voltaji dị mma na nke na-adịghị mma;n'otu oge ahụ, nke abụọ nke transformer na-emepụta voltaji dị mma na nke na-adịghị mma.N'oge a, a na-ebipụ diode D910 na nke abụọ, na nke a bụ ọkwa nchekwa ike;mgbe njedebe mmepụta nke pin 8 nke SG6841 dị na ọkwa dị ala, a na-ebipụ tube Q903 mgba ọkụ, na nke dị ugbu a na eriri isi nke ntụgharị T901 na-agbanwe ozugbo.bụ 0, ike electromotive nke isi bụ obere ihe dị mma na nke elu na-adịghị mma, na ike electromotive nke elu nke ọma na nke na-adịghị mma na-ebute na nke abụọ.N'oge a, a na-agbanye diode D910 wee malite mmepụta voltaji.
(1) sekit nchedo overcurrent
Ụkpụrụ ọrụ nke sekit nchebe overcurrent bụ ndị a.
Mgbe agbanwuru tube Q903, nke dị ugbu a ga-esi na drain ahụ gaa na isi iyi nke tube Q903, a ga-emepụta voltaji na R917.Resistor R917 bụ onye na-achọpụta ihe dị ugbu a, voltaji sitere na ya na-agbakwunye ya na ntinye ntinye na-adịghị agbanwe agbanwe nke onye na-achọpụta ihe karịrị nke PWM njikwa SG6841 mgbawa (ya bụ pin 6), ọ bụrụhaala na voltaji ahụ gafere 1V, ọ. ga-eme ka PWM njikwa SG6841 n'ime ime sekit nchebe ugbu a na-amalite, nke mere na 8th pin na-akwụsị mmepụta ebili mmiri pulse, na tube na-atụgharị na ntụgharị ntụgharị kwụsị ịrụ ọrụ iji ghọta nchebe dị ugbu a.
(2) High voltaji nchedo sekit
Ụkpụrụ ọrụ nke sekit nchebe dị elu dị ka ndị a.
Mgbe voltaji grid na-abawanye karịa uru kacha, mpụta voltaji nke igwe nzaghachi mgbanwe ga-abawanye.Voltaji ga-agafe 20V, n'oge a na-agbajikwa voltaji regulator tube ZD901, na voltaji dobe pụtara na resistor R911.Mgbe ọdịda voltaji dị 0.6V, a na-agbanye transistor Q902, mgbe ahụ, isi nke transistor Q901 na-aghọ ọkwa dị elu, nke mere na transistor Q901 na-agbanyekwa.N'otu oge ahụ, a na-agbanyekwa diode D903, na-eme ka 4th pin nke PWM njikwa SG6841 mgbanaka, na-eme ka ọ dị mkpirikpi oge dị mkpirikpi, nke na-eme ka PWM njikwa SG6841 gbanyụọ ngwa ngwa mmepụta ihe.
Na mgbakwunye, mgbe agbanyere transistor Q902, voltaji ntụaka 15V nke pin 7 nke PWM njikwa SG6841 na-agbada ozugbo site na resistor R909 na transistor Q901.N'ụzọ dị otú a, voltaji nke ike ọkọnọ ọnụ nke PWM njikwa SG6841 mgbawa na-aghọ 0, PWM njikwa na-akwụsị mmepụta pulse ebili mmiri, na ịgbanwee tube na ịgbanwee transformer kwụsị ịrụ ọrụ iji nweta elu voltaji nchebe.
5. Rectifier nzacha sekit
Ọrụ nke sekit nzacha nzacha bụ imezigharị na yochaa voltaji mmepụta nke ihe ntụgharị iji nweta voltaji DC kwụsiri ike.N'ihi ntapu inductance nke transformer mgbanwe na spike nke n'ihi na azụ mgbake ugbu a nke diode mmepụta, ha abụọ na-etolite nnyonye anya electromagnetic.Ya mere, iji nweta voltaji 5V na 12V dị ọcha, a ga-emezigharị voltaji mmepụta nke ihe ngbanwe nke mgbanwe na nzacha.
Ihe mebere sekit nzacha rectifier bụ nke diodes, ihe mgbochi nzacha, ihe nzacha nzacha, nzacha inductor, wdg.
N'ime ọnụ ọgụgụ ahụ, a na-eji sekit nzacha RC ( resistor R920 na capacitor C920, resistor R922 na capacitor C921) jikọtara ya na diode D910 na D912 na njedebe nke abụọ nke ntụgharị ntụgharị T901 na-eji amịkọrọ voltaji na-emepụta na diode D910 na D912.
Ihe nzacha LC nke mejupụtara diode D910, capacitor C920, resistor R920, inductor L903, capacitors C922 na C924 nwere ike nyochaa nnyonye anya electromagnetic nke mmepụta voltaji 12V site na onye ngbanwe wee wepụta voltaji 12V kwụsiri ike.
Ihe nzacha LC nke mejupụtara diode D912, capacitor C921, resistor R921, inductor L904, capacitors C923 na C925 nwere ike nyochaa nnyonye anya electromagnetic nke voltaji mmepụta 5V nke ihe ngbanwe ma wepụta voltaji 5V kwụsiri ike.
6. 12V / 5V nchịkwa nchịkwa nchịkwa
Ebe ọ bụ na 220V AC mains ike na-agbanwe n'ime ebe ụfọdụ, mgbe isi ike na-ebili, voltaji mmepụta nke transformer na sekit ike ga-ebilikwa otú ahụ.Iji nweta voltaji 5V na 12V kwụsiri ike, sekit Regulator.
Sekit regulator voltaji nke 12V/5V bụ nke mebere nke ọma voltaji regulator (TL431), optocoupler, PWM njikwa, na voltaji nkesa resistor.
Na ọnụ ọgụgụ, IC902 bụ optocoupler, IC903 bụ a nkenke voltaji regulator, na resistors R924 na R926 bụ voltaji nkesa resistors.
Mgbe sekit ọkọnọ ike na-arụ ọrụ, 12V mmepụta DC voltaji kewara site resistors R924 na R926, na a voltaji na-eme na R926, nke na-agbakwunyere ozugbo na TL431 precision voltaji regulator (na R ọnụ).Enwere ike mara ya site na paramita nguzogide na sekit voltaji a bụ naanị iji gbanye TL431.N'ụzọ dị otú a, voltaji 5V nwere ike na-agafe na optocoupler na nkenke voltaji regulator.Mgbe nke ugbu a na-agafe na optocoupler LED, optocoupler IC902 na-amalite ịrụ ọrụ ma mechaa nlele voltaji.
Mgbe 220V AC mains voltaji na-ebili ma mmepụta voltaji na-ebili otú ahụ, nke ugbu a na-agafe na optocoupler IC902 ga-abawanye kwa otú ahụ, na nchapụta nke diode na-enwu ọkụ n'ime optocoupler ga-abawanyekwa otú ahụ.Nguzogide n'ime nke fototransistor na-adịkwa ntakịrị n'otu oge ahụ, nke mere na a ga-ewusi ogo nchịkwa nke ọdụ ụgbọ elu fototransistor.Mgbe ogo conduction nke fototransistor siri ike, voltaji nke pin 2 nke PWM ike njikwa SG6841 mgbawa ga-ada n'otu oge.Ebe ọ bụ na a na-agbakwunye voltaji a na ntinye ntụgharị nke ihe nrịbama njehie dị n'ime nke SG6841, a na-achịkwa usoro ọrụ nke mmepụta nke SG6841 iji belata mmepụta voltaji.N'ụzọ dị otú a, overvoltage mmepụta nzaghachi loop na-etolite iji nweta ọrụ nke ịkwado mmepụta, na mmepụta voltaji nwere ike ịkwado na gburugburu 12V na 5V mmepụta.
ndumodu:
Optocoupler na-eji ọkụ dị ka ihe na-ebufe ọkụ eletrik.Ọ nwere mmetụta dịpụrụ adịpụ dị mma na ntinye na ntinye ọkụ eletrik, ya mere a na-ejikarị ya na sekit dị iche iche.Ka ọ dị ugbu a, ọ bụrụla otu n'ime ngwaọrụ optoelectronic ndị dị iche iche na-ejikarị eme ihe.Optocoupler n'ozuzu nwere akụkụ atọ: ọkụ ọkụ, nnabata ọkụ, na mmụba mgbaàmà.Mgbama eletrik ntinye aka na-eme ka diode ọkụ na-enye ọkụ (LED) na-ebunye ọkụ nke ụfọdụ wavelength, nke fotodetector na-anata iji mepụta fotocurrent, nke na-emewanyewanye na mmepụta.Nke a na-emecha ngbanwe eletriki-optical-electrical, si otú a na-arụ ọrụ ntinye, mmepụta na iche.Ebe ọ bụ na ntinye na mmepụta nke optocoupler dịpụrụ adịpụ site na ibe ya, na nnyefe ọkụ eletrik nwere njirimara nke unidirectionality, ọ nwere ikike mkpuchi ọkụ eletrik dị mma na ikike mgbochi.Na n'ihi na njedebe ntinye nke optocoupler bụ ihe na-adịghị ala ala nke na-arụ ọrụ na ọnọdụ dị ugbu a, ọ nwere ikike ịjụ ụdị nkịtị.Ya mere, ọ nwere ike melite oke mgbama na mkpọtụ dị ka ihe dịpụrụ adịpụ na nnyefe ozi ogologo oge.Dị ka ngwaọrụ interface maka ikewapụ mgbaàmà na nkwurịta okwu dijitalụ kọmputa na njikwa oge, ọ nwere ike ịbawanye ntụkwasị obi nke ọrụ kọmputa.
7. overvoltage nchebe sekit
Ọrụ nke sekit nchebe overvoltage bụ ịchọpụta mmepụta voltaji nke sekit mmepụta.Mgbe mpụta voltaji nke transformer na-ebili n'ụzọ na-adịghị mma, onye na-ahụ maka PWM na-agbanyụ mmepụta pulse iji mezuo ebumnuche nke ichebe sekit.
Ihe mejuputara sekit nchekwa overvoltage bụ nke PWM njikwa, ihe optocoupler, na tube regulator voltaji.Dị ka e gosiri na n'elu ọnụ ọgụgụ, voltaji regulator tube ZD902 ma ọ bụ ZD903 na sekit schematic eserese na-eji chọpụta voltaji mmepụta.
Mgbe voltaji mmepụta nke abụọ nke ihe ntụgharị na-ebilite n'ụzọ na-ezighi ezi, a ga-akụrikwa tube regulator tube ZD902 ma ọ bụ ZD903, nke ga-eme ka nchapụta nke tube na-enwu ọkụ n'ime optocoupler na-abawanye nke ọma, na-eme ka ntụtụ nke abụọ nke PWM njikwa. igafe site na optocoupler.Igwe fototransistor dị n'ime ngwaọrụ ahụ gbadoro ụkwụ, onye na-ahụ maka PWM na-ebipụ ngwa ngwa pulse mmepụta nke pin 8, na tube na-atụgharị na ntụgharị na-akwụsị ịrụ ọrụ ozugbo iji mezuo ebumnuche nke ichebe sekit.
Oge nzipu: Ọkt-07-2023