Ko e ha ʻoku faʻa mate ai ʻa e ngaahi maama LED kimuʻa ʻi heʻenau moʻui?

ʻOku fakaofo ʻa e LED chips ʻi heʻenau moʻui fuoloa, ʻa ia ko e lahi ʻoku fakafuofuaʻi ke tolonga ʻi he houa ʻe 50,000 pe lahi ange. Neongo ia, ʻoku ʻiloʻi ʻe ha taha pe kuo ne ngaue ki he maama LED ʻe lava pea ʻoku ʻikai ola lelei ʻa e ngaahi maama mo e ngaahi naunau kimuʻa ʻi he fakangatangata ko ʻeni. ʻOku faʻa iku ʻa e meʻa ko ʻeni ki he taʻefiemalie, he ʻoku fepaki ʻa e talaʻofa ʻo ha maʻuʻanga maama "ʻi he kotoa ʻo e moʻui" mo e moʻoni ʻo ha foʻi ʻuhila mate hili ha ngaahi taʻu siʻi pe. Ko e tukuakiʻi, ʻi he lahi taha ʻo e ngaahi meʻa, ʻoku ʻikai ko e LED chips, ka ko e fakaʻuli fakaʻilekitulonika ʻoku ne fakamalohiʻi kinautolu. Pea ʻi he fakaʻuli ko ia, ko e konga ʻoku faʻa tupu ai ʻa e taʻelavameʻa ko ha konga maʻulalo mo fakatokilalo: ko e electrolytic capacitor. ʻOku faʻa ongona ʻi he kautaha mama ko e moʻui nounou ʻo e ngaahi maama LED ʻoku makatuʻunga ia ʻi he nounou ʻo e moʻui ʻo e maʻuʻanga ʻuhila, pea ko e nounou ʻo e moʻui ʻa e maʻuʻanga ʻuhila ʻoku tupu ia mei he nounou ʻo e moʻui ʻa e electrolytic capacitor. Ko e ngaahi fakamatala ko ʻeni ʻoku ʻikai ko ha meʻa noa pe; ʻoku fakavaʻe kinautolu ʻi he tefitoʻi fisiki ʻo e founga ngaue mo e holoki ʻa e ngaahi konga ko ʻeni. ʻOku fonu ʻa e maketi ʻi ha ngaahi meʻa kehekehe ʻo e electrolytic capacitors, mei he tuʻunga maʻolunga, ngaahi konga moʻui loloa naʻe faʻu ki he ngaahi polokalama fakangaueʻanga ki he ngaahi meʻa nounou mo maʻulalo ange ʻoku faʻu ki he totongi maʻamaʻa taha ʻe lava. ʻI he mamani feʻauʻauhi lahi ʻo e maama LED, ʻa ia ʻoku fuʻu lahi ai ʻa e mahuʻinga ʻo e mahuʻinga, ʻoku fakasiʻisiʻi ʻe he ngaahi kautaha faʻu koloa ʻe niʻihi ʻaki hono fakaʻaongaʻi ʻo e ngaahi capacitors electrolytic maʻulalo ko ʻeni, ʻi he ʻiloʻilo pe ʻikai ke nau ʻiloʻi ʻoku faʻu ha koloa ʻoku ʻi ai ha ʻaho ʻoku ʻosi ai hono taimi. Ko ia ai, ko e mahino ʻa e fatongia mo e ngaahi fakangatangata ʻo e electrolytic capacitor ko e ki ia ke mahino ʻa e ʻuhinga ʻoku tolonga ai ʻa e ngaahi maama LED ʻe niʻihi kae ʻikai pehe ʻa e niʻihi.

Ko e ha ʻa e electrolytic capacitor pea ko e ha ʻoku mahuʻinga ai ʻi he LED drivers?

Ko e electrolytic capacitor ko ha faʻahinga capacitor ia ʻoku ne fakaʻaongaʻi ha electrolyte (ko ha huhuʻa pe gel ʻoku ʻi ai ha tuʻunga maʻolunga ʻo e ions) ke maʻu ha capacitance lahi ange ʻi he voliume ʻi he ngaahi faʻahinga capacitor kehe. ʻI ha fakaʻuli LED, ʻa ia ʻoku ne liliu ʻa e malohi AC ki he malohi maʻulalo ʻoku fie maʻu ʻe he LEDs, ʻoku fakahoko ʻe he electrolytic capacitors ha ngaahi fatongia mahuʻinga. Ko ʻenau tefitoʻi ngaue ke fakatokalelei ʻa e voltage AC ʻoku fakatonutonu. Hili hono liliu ʻe he ʻuluaki diode bridge rectifier ʻa e AC ki ha pulsating DC, ʻoku kei mamaʻo pe ʻa e waveform mei he voltage molemole, tuʻumaʻu ʻoku fie maʻu ʻe he LED. ʻOku ngaue ʻa e ngaahi capacitors electrolytic lalahi ko ha tauhiʻanga koloa, tauhi ʻa e ivi lolotonga e tumutumu ʻo e waveform voltage pea tukuange ia lolotonga ʻa e troughs, ʻo "smoothing" ai ʻa e output ki ha tuʻunga DC tuʻumaʻu ange. ʻOku mahuʻinga ʻa e ngaue ko ʻeni ki hono toʻo ʻo e flicker mo ʻomi ha ʻau tuʻumaʻu ki he LEDs. ʻOku toe fakaʻaongaʻi foki kinautolu ʻi he ngaahi konga kehe ʻo e fakaʻuli ki hono siviʻi mo tauhi ʻo e ivi. Neongo ia, ko e meʻa ko ia ʻoku ne ʻoange kiate kinautolu ʻa e malohi maʻolunga—ʻa e electrolyte huhuʻa—ko e tupuʻanga ia ʻo honau tefitoʻi vaivai. ʻE lava ke mole ʻa e electrolyte ko ʻeni ʻi ha vahaʻa taimi, ko ha founga ʻoku fakavaveʻi ʻe he vela. Ko e moʻui ʻo ha electrolytic capacitor ko ha meʻafua ia ʻo e loloa feʻunga ʻo e electrolyte ke ʻea ʻo to hifo ai ʻa e capacitance ʻi lalo ʻi ha tuʻunga ʻoku lava ke fakaʻaongaʻi, pea ʻi he taimi ko ia ʻoku ʻikai ke toe lava ʻo ngaue lelei ai ʻa e fakaʻuli, ʻo tupu ai ʻa e ulo ʻo e maama LED.

ʻOku uesia fefe ʻe he mafana ʻo e ʻatakai ʻa e moʻui ʻo ha electrolytic capacitor?

ʻOku fehokotaki ʻa e moʻui ʻo ha electrolytic capacitor mo e mafana ʻo ʻene ngaue. ʻOku fuʻu mahuʻinga ʻaupito ʻa e fetuʻutaki ko ʻeni pea ʻoku ʻikai hano ʻuhinga ʻo e moʻui ʻa ha capacitor taʻe ʻi ai ha mafana pau. ʻI he taimi ʻoku ke sio ai ki ha capacitor ʻoku fakaʻilongaʻi ʻaki ha moʻui ʻo e houa ʻe 1,000, ʻoku mahino ia, pea kuo pau ke fakamahinoʻi, ko ʻene moʻui ʻi ha mafana pau ʻo e ʻatakai. Ko e mafana angamaheni ʻo e fakamoʻoni ki he lahi taha ʻo e ngaahi capacitors electrolytic fakalukufua ko e 105°C. ʻOku ʻuhinga ʻeni ʻoku fokotuʻutuʻu ʻa e capacitor ke ngaue ʻi ha houa ʻe 1,000 (meimei ʻaho ʻe 42) ʻi he taimi ʻoku 105°C maʻu pe ʻa e mafana ʻo e ʻatakai. ʻOku mahuʻinga ke mahino ʻa e ʻuhinga ʻo e "ngataʻanga ʻo e moʻui" ko ʻeni. ʻOku ʻikai ʻuhinga ia ʻoku pa pe taʻofi ʻa e ngaue ʻa e capacitor ʻi he houa ʻe 1,001. Ko e fakaʻuhingaʻi ʻo e taʻemalava ki ha electrolytic capacitor ʻoku angamaheni ʻaki ʻa e taimi kuo holo ai ʻa e capacitance ʻaki ha peseti pau (faʻa 20% pe 50%) mei hono ʻuluaki mahuʻinga, pe ʻi he taimi kuo tupulaki ai ʻa e resistance ʻo e hokohoko tatau (ESR) ʻo laka hake ʻi ha fakangatangata pau. Ko ia, ko ha capacitor 20μF ʻoku fakafuofuaʻi ki he houa ʻe 1,000 ʻi he 105°C, hili ha houa ʻe 1,000 ʻi he mafana ko ia, ʻe lava ke fua pe ʻa e 10μF. ʻOku ʻikai ke toe lava ʻe he fakasiʻisiʻi ko ʻeni ʻo e capacitance ʻo fakahoko lelei ʻene ngaue smoothing, ʻo iku ki he fakautuutu ʻo e ripple current, ʻa ia ʻoku ne toe fakamamafaʻi ʻa e circuit mo e LED chips, ʻo iku ʻo fakatupu ai ʻa e mate ʻa e mama.

Ko e ha ʻa e fekauʻaki ʻa e mafana mo e capacitor lifespan?

ʻOku puleʻi ʻa e fekauʻaki ʻa e mafana ʻo e ngaue ʻa e electrolytic capacitor mo hono moʻui ʻaonga ʻe ha tefitoʻi moʻoni kemikale kuo fokotuʻu, ʻa ia ʻoku faʻa fakanounouʻi ʻe ha lao ʻoku ʻiloa ko e "lao tikili ʻe 10." ʻOku pehe ʻe he lao ko ʻeni ko e holo kotoa pe ʻo e 10°C ʻi he mafana ʻo e ngaue, ʻoku liunga ua ʻa e lifespan ʻo e capacitor. ʻI he tafaʻaki ʻe taha, ko e tupu kotoa pe ʻe 10°C ʻi ʻolunga ʻi hono mafana ʻo e ʻea, ʻoku vaeua ʻa e moʻui. Ko ha founga faingofua ʻeni kae matuʻaki tonu ke fakafuofuaʻi ʻa e ola ʻo e mafana ʻo e ʻea. Hange ko ʻeni, fakakaukau ki ha capacitor ʻoku fakafuofuaʻi ki he houa ʻe 1,000 ʻi he 105°C. Kapau ʻoku ngaue hokohoko atu ʻi ha 75°C mokomoko ange, ʻa ia ko ha to ʻe 30°C mei hono rating, ʻe liunga ua ʻene moʻui ʻi he 10°C kotoa pe: 1,000 → 2,000 (ʻi he 95°C) → 4,000 (ʻi he 85°C) → 8,000 (ʻi he 75°C). ʻOku fokotuʻu mai ʻe he fikaʻi faingofua ko ʻeni ʻe lava ke houa ʻe 8,000 ʻa e capacitor ʻi he 75°C. Kapau ʻe lava ke maʻulalo ange ʻa e mafana ʻo e ʻea ʻi loto ʻi he naunau LED, hange ko e 65°C, ʻe aʻu ʻa e moʻui ki he houa ʻe 16,000. ʻI he 55°C, ʻoku hoko ia ko e houa ʻe 32,000, pea ʻi he 45°C, ko ha houa fakaʻofoʻofa ia ʻe 64,000. ʻOku fakamamafaʻi ʻe he fetuʻutaki exponential ko ʻeni ʻa e matuʻaki mahuʻinga ʻo hono puleʻi ʻo e mafana ʻo e ʻea ʻi he LED fixtures. ʻOku fakapapauʻi ʻa e mafana ʻo e ʻea ʻo e electrolytic capacitor ʻe he vela ʻoku faʻu ʻe he LEDs mo e ngaahi konga kehe ʻo e fakaʻuli, ʻo potupotutatau mo e ola lelei ʻo e heat sink mo e ventilation. ʻI ha maama ʻoku ʻikai lelei hono fokotuʻutuʻu ʻa ia ʻoku faʻo fakataha ai ʻa e LEDs mo e electrolytic capacitors ʻi ha kiʻi puha pelesitiki siʻisiʻi ʻoku tapuni ʻo ʻikai ha vela, ʻe lava ke maʻolunga ʻa e mafana ʻo e ʻea ʻi loto, ʻo fakanounouʻi ʻaupito ʻa e moʻui ʻa e capacitor pea mo e mama kotoa.

ʻE lava fefe ke tau fakaloloa ʻa e moʻui ʻo e electrolytic capacitors ʻi he ngaahi maama LED?

Koeʻuhi ko e electrolytic capacitor ʻoku faʻa vaivai taha, ʻoku mahuʻinga taha hono fakaloloa ʻene moʻui ki hono faʻu ʻo ha koloa LED tuʻuloa. ʻOku ʻi ai ha founga tefito ʻe ua ke aʻusia ai ʻeni: ʻi hono fakaleleiʻi ʻo e palani mo e ngaohi ʻo e capacitor, pea ʻi hono fakaʻaongaʻi fakalelei mo e palani ʻo e circuit ʻi loto ʻi he fakaʻuli LED. Mei he tafaʻaki ʻo e fokotuʻutuʻu ʻo e konga, ko e fili ko e electrolyte evaporation. Ko ia ai, ko hono fakaleleiʻi ʻo e silaʻi ʻo e capacitor ko ha founga fakahangatonu mo ola lelei. ʻE lava ke aʻusia ʻeni ʻe he kau faʻu koloa ʻaki hono fakaʻaongaʻi ʻo e ngaahi naunau fakamaʻu lelei ange, hange ko ha ʻufiʻufi pelesitiki phenolic mo e electrodes ʻoku fakatahaʻi ʻa ia ʻoku crimped maʻu ki he kapa aluminium, fakataha mo e gaskets makehe ʻe ua ʻoku ne ʻomi ha sila hermetic ange. ʻOku taʻofi ʻe he meʻa ni ʻa e electrolyte mei he hola. Ko e founga ʻe taha ko hono fakaʻaongaʻi ha electrolyte ʻoku siʻisiʻi ange ʻa e volatile pe ko ha electrolyte polymer fefeka kae ʻikai ko ha meʻa huhuʻa, ʻo faʻu ai ʻa e "polymer capacitors" ʻa ia ʻoku loloa ange ʻenau moʻui ka ʻoku toe mamafa ange foki.

Mei he tafaʻaki hono fakaʻaongaʻi mo e fokotuʻutuʻu ʻo e circuit, ko e meʻa mahuʻinga taha ko hono puleʻi ʻo e ʻatakai ngaue ʻo e capacitor mo e mafasia fakaʻuhila. Ko e sitepu ʻuluaki mo mahino taha ko hono tauhi ke mokomoko. ʻOku ʻuhinga ʻeni ki hono fokotuʻu ʻo e capacitor ʻi ha konga mokomoko ange ʻo e circuit ʻo e fakaʻuli, mamaʻo mei he ngaahi konga lalahi ʻo e vela, pea fakapapauʻi ʻoku mapuleʻi lelei ʻe he maama fakalukufua ʻa e mafana ʻo e ʻea ke tauhi ʻa e mafana ʻo e ʻea ʻi loto ki he maʻulalo taha ʻe lava. Ko e meʻa mahuʻinga ʻe taha ʻo e mafasia fakaʻuhila ko e ripple current. ʻOku fakafonu mo tukuange maʻu pe ʻa e capacitor ʻe he high-frequency switching ʻo e maʻuʻanga ʻuhila. ʻOku fakatupu ʻe he ripple current ko ʻeni ʻa e mafana ʻo e loto koeʻuhi ko e fakafepaki tatau ʻa e capacitor (ESR), ʻo toe tokoni lahi ange ki he hiki hake ʻa e mafana ʻo e ʻea. Kapau ʻoku fuʻu maʻolunga ʻa e ʻau ʻo e ripple, ʻe lava ke fakanounouʻi ʻaupito ʻene moʻui. Ko e founga lelei ʻe taha ke fakasiʻisiʻi ʻaki ʻa e mafasia ʻo e ripple ko hono fakaʻaongaʻi ʻo e capacitors ʻe ua ʻi he taimi tatau. ʻOku vahevahe ʻe he meʻa ni ʻa e fakakatoa ʻo e ripple lolotonga ʻi honau vahaʻa, fakasiʻisiʻi ʻa e mafasia ʻi he capacitor fakafoʻituitui takitaha pea holoki lelei ʻa e ESR ʻo e hoa fakatahaʻi, ʻa ia ʻoku ne fakasiʻisiʻi foki ʻa e faʻu ʻo e vela. Ko hono fili fakalelei ʻo e capacitors ʻoku maʻolunga ange ʻa e rating ʻo e ripple current ko ha founga lelei ia ʻe taha.

Ko e ha ʻoku faʻa mate fakafokifa ai ʻa e electrolytic capacitors, neongo kapau ko e faʻahinga moʻui loloa kinautolu?

ʻE lava ke puputuʻu mo fakatupu loto-foʻi ʻi he taimi ʻoku mate vave ai ha maama ʻoku ne fakaʻaongaʻi ha capacitor electrolytic ʻoku pehe ʻoku "moʻui fuoloa". ʻOku faʻa tuhu ʻeni ki ha tuʻunga ʻo e taʻelavameʻa ʻoku kehe mei he evaporation mamalie ʻo e electrolyte: maumau fakatuʻutamaki koeʻuhi ko e fuʻu lahi ʻo e voltage pe ngaahi meʻa ʻoku hoko. Naʻa mo e capacitor lelei taha ʻoku silaʻi lelei mo e ESR maʻulalo ʻe lava ke fakaʻauha he taimi pe ko ia ʻe ha voltage spike ʻoku lahi ange ʻi hono voltage maʻolunga taha. Neongo ʻoku tuʻu maʻu ʻetau ʻuhila ʻi he tuʻunga fakatuʻutamaki, ka ʻoku faʻa fakatupu ʻe he tapa ʻa e ʻuhila ofi mai. Neongo ʻoku lahi ʻa e maluʻi ʻo e ʻuhila ʻi he ngaahi netiueka lalahi ʻo e ʻuhila, ka ʻe kei lava pe ke mafola ʻa e ngaahi maʻuʻanga ivi maʻolunga ko ʻeni pea ʻasi mai ko ha taimi nounou mo fakatuʻutamaki ʻi he ngaahi laine ʻuhila ʻi he ʻapi mo e fakakomesiale. ʻE lava ke laungeau pe lauiafe volts ʻa e ngaahi puna ko ʻeni, ʻo aʻu pe ki he microseconds, ka ʻoku feʻunga pe ia ke fakaava ʻa e konga manifi ʻo e dielectric oxide ʻi loto ʻi ha electrolytic capacitor, ʻo fakanounouʻi ia pea fakaʻauha he taimi pe ko ia. Ke maluʻi mei he meʻa ni, kuo pau ke fakakau ʻe ha fakaʻuli LED kuo fokotuʻutuʻu lelei ʻoku fakalele mei he mains ʻa e circuitry maluʻi malohi ʻi hono input. ʻOku faʻa kau heni ha fuse ke maluʻi mei he fuʻu totuʻa, pea mo ha konga mahuʻinga ʻoku ui ko e ukamea oxide varistor (MOV). ʻOku fokotuʻu ʻa e MOV ʻi he ngaahi laine moʻui mo tuʻu ʻi tuʻa. ʻI he malumalu ʻo e voltage angamaheni, ʻoku maʻolunga ʻaupito ʻene fakafepaki pea ʻoku ʻikai ke ne fai ha meʻa. Ka ʻi he taimi ʻoku hoko ai ha fuʻu malohi maʻolunga, ʻoku holo ʻaupito ʻa hono fakafepaki, shunting ʻa e ivi ʻo e surge pea "clamping" lelei ʻa e voltage ki ha tuʻunga malu, maluʻi ʻa e electrolytic capacitors pelepelengesi mo e ngaahi konga kehe ʻi lalo. Kapau ʻoku ʻikai ke maʻu ʻe ha fakaʻuli ʻa e maluʻi ko ʻeni, pe kapau ʻoku ʻikai lelei ʻa e varistor, naʻa mo e capacitor electrolytic lelei taha ʻe tuʻu laveangofua ki hono hokaʻi ʻe he ʻuhila hono hoko, ʻo iku ki he mate fakafokifa mo taʻeʻamanekina ʻa e mama.

Ngaahi Fehuʻi ʻOku Faʻa ʻEke Fekauʻaki mo e Electrolytic Capacitors ʻi he LED Lamps

ʻE lava ke ngaue ha maama LED taʻe ʻi ai ha electrolytic capacitor?

ʻOku faʻu ʻa e ngaahi fakaʻuli LED ʻe niʻihi ke "siʻisiʻi ange ʻa e capacitor" pe ke fakaʻaongaʻi ha faʻahinga capacitors kehe, ka ʻoku siʻisiʻi ange ʻenau angamaheni. Ko e Electrolytic capacitors ko e founga ʻaonga mo totongi lelei taha ia ke aʻusia ʻa e capacitance lahi ʻoku fie maʻu ki he smoothing lelei ʻi he lahi taha ʻo e AC-powered LED drivers. Ka ʻikai ha capacitance feʻunga, ʻe ʻi ai ha kemo lahi mo ʻikai tali ʻa e mama. ʻE lava ke fakaʻaongaʻi ʻe he kau fakaʻuli maʻolunga ʻa e capacitors filimi mamafa ange pe topologies ʻo e circuits maʻolunga ke fakasiʻisiʻi ʻa e fie maʻu ʻo e electrolytics lalahi.

Te u lava fefe ʻo tala pe ʻoku kovi ʻa e capacitor ʻo ha maama LED ʻoku maumau?

Kapau ʻoku ke ongoʻi fiemalie ke fakaava ʻa e fakaʻuli (ʻi he tokanga, he ʻe lava ke pukepuke ʻe he capacitors ha kavenga fakatuʻutamaki), ʻe lava ke ʻilo ʻi he taimi ʻe niʻihi ʻoku kovi ʻa e electrolytic capacitor. ʻOku kau ʻi he ngaahi fakaʻilonga ʻa e pupula pe ʻoku ʻi ai ha fuʻu meʻa ʻi ʻolunga (kuo ava ʻa e ʻea maluʻi), ha faʻahinga fakaʻilonga ʻo ha electrolyte lanu melomelo, pe ko ha nanamu vela. ʻI he founga fakaʻuhila, ʻe lava ʻe ha meʻa ʻoku maumau ʻa e capacitor ʻo fakatupu ʻa e ulo ʻa e mama, ngunguu, pe ʻikai ke mama. ʻE fakahaaʻi ʻe hono fua ʻaki ha meʻafua capacitance ha tuʻunga mahuʻinga ʻoku maʻulalo ʻaupito ʻi hono fakafuofuaʻi ʻo e capacitance.

ʻOku kovi kotoa ʻa e electrolytic capacitors ʻi he ngaahi maama LED?

ʻIkai, ʻikai ʻaupito. ʻOku ʻikai ko e palopalema ʻa e tekinolosia, ka ko e tuʻunga lelei ʻo e konga ʻoku fakaʻaongaʻi mo e ʻatakai mafana ʻoku tuku ai. ʻE lava ke tolonga ʻi ha ngaahi taʻu lahi pea ʻikai ko e fakangatangata ʻo e moʻui ʻa e mama ʻi ha ngaahi meʻa ʻoku fokotuʻutuʻu lelei ʻi he 105°C. ʻOku hoko ʻa e palopalema ʻi he taimi ʻoku fakaʻaongaʻi ai ʻa e capacitors ʻoku ʻikai lelei mo moʻui nounou, pe ʻi he taimi ʻoku fuʻu vela ai ʻa e capacitors lelei.