Tataiso ea Tlhahiso ea PCB ea Wireless Charging

 Highleap Electronics e fana ka litharollo tse felletseng tsa tlhahiso ea PCB le kopano ho pholletsa le likarolo tsa lisebelisoa tsa elektroniki, tsa likoloi, tsa bongaka le tsa indasteri. Li-PCB tsa ho tjhaja ka waelese li fetohile tse ikhethang ha lefatše le ntse le leba matla a se nang mohala. Ho tloha ho li-pads tsa li-smartphone tsa 5W ho isa litsing tsa likoloi tsa 100W, re etsa liboto tse fetisang matla hantle ka matla a khoheli ha li ntse li kopana le polokeho e tiileng le litlhoko tsa EMI.

Moqapi oa Potoloho ea Resonant ea PCB ea Wireless Charging

Ho tjhaja ntle le waelese ho sebetsa ka ho hokahanya ha resonant inductive lipakeng tsa li-coil tsa transmitter le receiver. Ho sebetsa hantle ho itšetlehile haholo ka ho bapisa maqhubu a resonant-esita le 1% e sa lumellaneng e ka fokotsa phetiso ea matla ka 20% kapa ea baka ho hloleha ho felletseng.

Resonance equation f = 1/(2π√LC) e bonahala e le bonolo, empa e le motsoako oa tolerance:

• Coil inductance e fapana ± 10% ka tlhahiso
• Mamello ea bokhoni e eketsa ± 5% ho hloka botsitso
• Li-coefficients tsa mocheso li kenya letsoho ho ± 3% ho hoholeha
• Likokoana-hloko tsa PCB li hlahisa mefuta e sa lebelloang

Liphetoho tse kopantsoeng li ka fetola resonance ± 15%, tsa senya katleho. Re sebetsana le sena ka ho khetha likarolo tse nepahetseng (± 1% kapa ho feta), li-capacitor tse tsitsitseng tsa C0G/NP0, ho fokotsa likarolo tsa capacitor bakeng sa tokiso, le meralo e fokotsang liphello tsa likokoana-hloko.

Q-factor e etsa qeto ea katleho ea phetisetso ea matla. Matla a phetisetso ea likhoele tsa High-Q ka tahlehelo e nyane. Moralo oa PCB o ama Q haholo ka ho hanyetsa ho latela mohlala, ka ho beha, ho kopanya sefofane sa fatše, le litlamorao tsa bohaufi. Meralo ea rona e fihlela Q-factor e fetang koporo e fokolang ea 200 ho isa ho 3oz, e ntlafalitsoe ka tšebeliso, le mekhoa e hlokolosi ea tsamaiso ea tšimo e ntlafalitsoeng tlhahisong ea rona ea PCB e nang le matla a mangata.

Moqapi oa Coil oa PCB oa ho tjhaja ntle le mohala le ho kopanya

Coil ea transmitter e laola boholo ba tjhaja e se nang mohala le ts'ebetso. Ho na le mekhoa e 'meli ea ho kopanya, e' ngoe le e 'ngoe e na le mekhoa e fapaneng ea khoebo.

Likhoele tse Kenngoeng ka PCB: Li-spiral tse nang le mekhahlelo e mengata tse hahiloeng ka har'a PCB li fana ka mokhoa o phethahetseng oa ho pheta-pheta le kopano e iketsang:

• Likarolo tse 4-10 bakeng sa inductance e nepahetseng
• 3-6oz koporo bakeng sa khanyetso e tlaase
• Karolelano e ntlafalitsoeng ea bophara/sebaka
• E nyane ka likhokahano

Phephetso: ho fumana lintlha tse phahameng tsa Q-factor ka mekhoa ea PCB. Ho hanyetsa koporo ho feta terata ea Litz, 'me liphello tse haufi pakeng tsa lihlopha li eketsa tahlehelo. Re ntlafatsa ka ho sebelisa mekhoa e mengata ea ka ntle moo ho teteaneng ho holimo le ho boloka sebaka se fokotsa liphello tsa ho atamelana.

Ho Kopanya Lithapo le Maqeba: Likhoele tsa terata tsa Litz li fana ka Q-factor e ntle (>300) empa li hloka tlhokomelo e nepahetseng ea PCB:

• Lipokotho tse tsamaisoang tse nang le mamello ea ± 0.1mm
• Lisebelisoa tsa solder bakeng sa ho felisoa ha terata
• Phomolo ea khatello e thibelang ho hloleha ha mochine
• Likarolo tsa ho hokahanya ha thebe ea Ferrite

PCB e fetoha sethala se nepahetseng ho boloka coil flatness ka hare ho 0.1mm bakeng sa ho kopanya ho tsitsitseng. Tlhahiso ea rona ea PCB ea ho tjhaja waelese e netefatsa kopanyo e tšepahalang ho sa tsotelehe mofuta oa li-coil.

Tšireletseho ea PCB ea ho tjhaja ntle le mohala e nang le Teko ea Lintho tsa kantle ho naha (FOD)

Lintho tsa tšepe pakeng tsa tjhaja le sesebelisoa li ka futhumatsa ka kotsi. Foreign Object Detection (FOD) e thibela mello ka mekhoa e mengata ea ho lemoha eo re e sebelisang.

Tlhokomelo ea Q-Factor: Lintho tsa tšepe li theola khoele ea Q ka ho monya matla. Re lekanya Q ea motheo ha re qala, re beha leihlo khafetsa nakong ea ho tjhaja, re lemoha phokotso ea 5%, 'me re arabela ka har'a 100ms. Sena se hloka kutloisiso e nepahetseng ea hona joale (±1%), litšupiso tse tsitsitseng mocheso, li-interface tsa ADC tse lebelo le phahameng, le lipotoloho tse arohaneng tsa tekanyo.

Ho Lemoha Phetoho ea Maqhubu: Lintho tsa tšepe li fetola inductance e sebetsang hantle, ho fetola molumo. Ho kenya tšebetsong ho hloka litšupiso tse tsitsitseng tsa oscillator, tekanyo ea maqhubu a nepahetseng, le puseletso ea mocheso. Phihlelo ea rona ea PCB ea mokhanni oa LED ka lipotoloho tsa analog tse nepahetseng e netefatsa ho lemoha ho nepahetseng.

Di-Array tsa Di-Coil tse Ngata: Ditsamaiso tse tswetseng pele di sebedisa di-coil tsa kutlo tse 8-16 tse potileng coil e kgolo e fanang ka tlhahlobo ya sebaka. Tsena di hloka sebopeho se hlokolosi ho thibela ho kopana ha di ntse di boloka kutlo ka dikarolo tse ikgethileng, ho sireletsa pakeng tsa dipotoloho, le bolelele bo tshwanang ba trace.

Mekhoa ea Taolo ea EMI ho Moralo oa PCB ea ho tjhaja o se nang mohala

Li-charger tse se nang mohala ke li-radiator tsa ka boomo ho maqhubu a ISM (87-205kHz bakeng sa Qi), empa tlhahiso e tlameha ho lula ka har'a meeli ea molao. Phephetso: ho fetisa 50W ka matla ha u ntse u kopana le litlhoko tsa EMI. Tsela e 'ngoe le e' ngoe ea PCB e fetoha antenna. Ho 100kHz, katleho e fokola empa li-harmonics li khanya ka katleho. Re laola likhase ka:

• Bolelele bo fokotsehileng ba ho latela mohlala ka ho beoa hantle
• Litsela tse fapaneng li hlakola libaka tse nang le mahlaseli
• Lifofane tsa Shield tse nang le matla a motlakase
• Ho roala ka lehlakoreng ho theha cage e felletseng ea Faraday

Sebaka sa ho tjhaja ka bosona se hloka ho bopa. Lishiti tsa Ferrite li tsamaisa masimo ho ea holimo, lithebe tsa aluminium li thibela mesi e tsoang ka ntle, 'me geometry ea coil e ntlafalitsoeng e tsepamisa matla moo ho hlokahalang. Ts'ebetsong e nepahetseng e fokotsa tlhahiso e sa batleheng ea 20dB ha e ntse e ntlafatsa phetisetso ea matla.

Mesi e fetisetswang e kgutlela morao ka phepelo ya motlakase. Re kenya tshebetsong di-choke tsa mokgwa o tlwaelehileng ho keno, marangrang a ho sefa a capacitor a X/Y, moralo o nepahetseng wa sefofane sa fatshe, le karohano ya sebele pakeng tsa dikarolo tse lerata le tse hlwekileng. Mekhoa ena ho tswa ho boiphihlelo ba rona ba PCB ba ho fetola matla e netefatsa hore e latela melao.

Ntlafatso ea boits'oaro bakeng sa li-PCB tsa ho tjhaja ntle le mohala

Ho tjhaja ntle le waelese ho lahleheloa ke dikgokelo tse nang le dithapo ka tlhaho ke 10-20% ha ho bapiswa le dikgokelo tse nang le dithapo. Moralo o motle wa PCB o fokotsa tahlehelo ena ka ho ntlafatsa ka hloko. Ka 100kHz+, phello ya letlalo e thibela motlakase ho bokahodimo ba koporo. Botebo ba letlalo ke 0.2mm feela, e leng se bakang kganyetso e sebetsang ho eketseha ka makgetlo a 2-5. Matshwele a hajwale a ho latela mathoko ha bohaufi bo baka tahlehelo e eketsehileng.

Litharollo li kenyelletsa mesaletsa e mengata e bapileng khahlanong le litsela tse teteaneng tse le 'ngoe, sebaka se setle sa conductor, tsela e kobehileng bakeng sa ho tsamaisa ha motlakase butle-butle, le koporo e boima (3-6oz) bakeng sa likarolo tsa bohlokoa. Mekhoa ena e pakiloeng meralong ea rona ea PCB ea ho tjhaja ka potlako e eketsa katleho ea ho tjhaja ntle le waelese.

Ho feto-fetoha ha Zero-voltage ho felisa tahlehelo ea ho bulela nako ka taolo e nepahetseng ea nako e shoeleng (50-200ns), litšobotsi tse tsamaellanang tsa FET, bokhoni bo laoloang ba likokoana-hloko, le nako e ntlafalitsoeng ea liheke. Sebopeho sa PCB se etsa qeto ea katleho ea ZVS e hlokang hore ho be le li-loop inductance tse fokolang le likokoana-hloko tse leka-lekaneng.

LBH

P: Tekanyetso ea ho tjhaja waelese ea Qi ke eng?
A: Qi ke maemo a ka sehloohong a sebetsang ho 87-205kHz bakeng sa phetisetso ea matla a fihlang ho 15W. Highleap Electronics e etsa li-PCB tse tiisitsoeng ka Qi tse nang le taolo e nepahetseng ea maqhubu, ts'ebetsong ea FOD, le ho latela melaoana e netefatsang hore lisebelisoa tsa bokahohle li lumellana.

P: Ho tjhaja waelese ho sebetsa hantle hakae?
A: Ho tjhaja mohala oa sejoale-joale ho fihlela katleho ea 75-85% khahlano le 90-95% bakeng sa mehala. Highleap Electronics e holisa ts'ebetso ka ho kopanya li-coil tse ntlafalitsoeng, li-circuits tse nang le li-resonant tse phahameng tsa Q, lisebelisoa tse lahleheloang haholo, le khetho ea likarolo tse nepahetseng e ntse e fihlela litekanyetso tsa maemo a holimo.

P: Ke eng e etsang hore lijajara tse se nang mohala li chese ho feta tekano?
A: Mocheso o tsoa ho hanyetsa li-coil, tahlehelo ea ho fetola, tahlehelo ea mantlha, le ho se sebetse hantle ha phetisetso. Highleap Electronics e fokotsa ho futhumatsa ka lisebelisoa tsa mocheso, li-metal-core substrates moo ho hlokahalang, li-switch frequencies tse ntlafalitsoeng, le mokhoa o phethahetseng oa mocheso nakong ea moralo.

P: Na ho tjhaja waelese ho ka sebetsa ka linyeoe?
A: E, boholo ba maemo a ho fihla ho 5mm botenya bo sebetsa hantle. Likotlolo tsa tšepe li thibela matla a khoheli ka ho feletseng. Meralo ea Highleap Electronics e amohela botenya ba linyeoe tse tloaelehileng ka moralo o ntlafalitsoeng oa li-coil le tokiso ea boemo ba matla. Ea rona PCB ea matla ea GaN boitseanape bo phahameng ba maqhubu bo nolofalletsa phetisetso ea matla e atlehileng ho sa tsotellehe likheo.