Menene Dokokin Wuta? {0} Polinovel

Lokacin da ma'aikatan datacenter a Sabis na Yanar Gizo na Amazon suka lura da faɗuwar uwar garken ba zato ba tsammani a cikin sa'o'in buƙatu mafi girma, bincike ya nuna mai laifi gama gari: rashin daidaituwar wutar lantarki a cikin hanyar rarraba wutar lantarki. Ƙudurin da ake buƙatar aiwatar da ingantattun tsarin sarrafa wutar lantarki{1}yana nuna yadda wannan mahimman ra'ayi na lantarki ke tasiri kai tsaye ga amincin kayan aikin zamani. Tsarin wutar lantarki yana ƙayyade ko tsarin wutar lantarki na ku yana aiki lafiya ko kuma yana fuskantar matsala mai tsada, daga wayoyin hannu zuwa wuraren masana'antu.

Ƙa'idar ƙarfin lantarki tana nufin ikon tsarin lantarki don kiyaye daidaiton ƙarfin fitarwa duk da bambancin ƙarfin shigarwar ko yanayin kaya. Wannan damar tana wakiltar ƙa'idar tushe a cikin injinin wutar lantarki da ƙirar lantarki, inda ko da ƙananan karkatattun wutar lantarki na iya shiga cikin gazawar kayan aiki ko haɗarin aminci.

Manufar ita ce ta bayyana a cikin mahallin guda biyu: azaman dukiya mai wucewa wanda ke kwatanta canjin ƙarfin lantarki a cikin abubuwan watsawa, kuma azaman sa baki mai aiki ta hanyar sarrafa na'urori. A cikin tsarin wutar lantarki, ana ƙididdige ƙa'idodin ƙarfin lantarki azaman rabo maras girma: (Vnl - Vfl)/Vfl, inda Vnl ke wakiltar babu{2}}arfafa wutar lantarki kuma Vfl tana wakiltar cikar wutar lantarki-. Ƙananan kashi suna nuna ƙa'ida mafi girma{5}}aƙƙarfan tsarin zai cimma 0%, ma'ana canjin wutan sifiri tsakanin babu-nauyi da cikakkun yanayin kaya-.

Mahimmin ƙimar ƙa'idar ƙarfin lantarki ta haɓaka sama da ƙayyadaddun fasaha zuwa sakamako na aiki na zahiri. Tsarukan da ke da ingantacciyar ƙa'ida sun sami hanyoyin gazawa uku masu mahimmanci waɗanda ƙungiyoyi ba za su iya yin watsi da su ba.

Na farko, lalata kayan aiki yana ƙaruwa sosai a ƙarƙashin yanayin ƙarfin lantarki mara ƙarfi. Kayan aikin lantarki da aka ƙera don takamaiman matakan ƙarfin lantarki suna fama da raguwar inganci da gajeriyar rayuwa yayin aiki a waje mafi kyawun jeri, tare da induction induction yana nuna asara mafi girma a ƙarƙashin ƙa'ida mara kyau. Cibiyar masana'anta da ke tafiyar da injina a 10% ƙasa da ƙimar ƙarfin lantarki na iya ganin hasara mai inganci sama da 15%, yana fassara zuwa ƙaƙƙarfan sharar makamashi na shekara-shekara.

Na biyu, rashin zaman lafiyar wutar lantarki yana haifar da gazawar tsarin kariya na cascading. Lokacin da cibiyoyin sadarwar rarraba suka sami jujjuyawar wutar lantarki a lokacin manyan lodi, na'urorin kariya na iya yin tafiya ba dole ba, haifar da tartsatsin yaduwa wanda ke yaduwa ta hanyar haɗin gwiwa. Bakin yankin Arewa maso Gabas na 2003 ya nuna wannan rashin ƙarfi{3}} rashin daidaituwar wutar lantarki ya ba da gudummawa ga jerin abubuwan da suka bar mutane miliyan 50 ba su da wutar lantarki.

Na uku, na'urorin lantarki na zamani suna buƙatar ƙarin jurewar ƙarfin lantarki. Microprocessors, kwakwalwan ƙwaƙwalwar ajiya, da tsarin sarrafawa na dijital suna aiki a cikin windows irin ƙarfin lantarki wani lokacin kunkuntar fiye da ± 50 millivolts. Tare da haɗaɗɗun da'irori waɗanda ke buƙatar matakan ƙarfin lantarki da yawa da haɓaka ƙarfin ƙarfi, asarar isar da saƙo ya zama mahimmanci{3}}irƙirar ƙirƙira zuwa ga haɗaɗɗun masu sarrafa wutar lantarki da aka sanya kai tsaye a cikin fakitin guntu.

Abubuwan da suka shafi kuɗi sun haɗa waɗannan matsalolin fasaha. Matsakaici{1}matsakaicin ma'ajin bayanai da ke fuskantar matsalolin ƙayyadaddun wutar lantarki na iya haifar da $50,000-$200,000 a cikin farashin sauyawa kayan aiki kowace shekara, da asarar kudaden shiga daga raguwar lokaci. Don abubuwan amfani, ƙa'ida mara kyau tana haifar da gunaguni na abokin ciniki, hukunce-hukuncen tsari, da buƙatun haɓaka kayan aiki waɗanda zasu iya kaiwa miliyoyin daloli.

Voltage Regulation

Fahimtar ƙa'ida ta fara da ma'anarta ta ƙididdigewa. Kashi na ƙayyadaddun wutar lantarki yana bayyana nawa ƙarfin lantarki ke canzawa tsakanin abubuwan da aka sauke da cikakkun abubuwan da aka ɗorawa:

Tsarin Wutar Lantarki (%)=[(VNL - VFL) / VFL] × 100

Inda:

VNL=Babu - ɗora wutar lantarki (yanayin buɗaɗɗen kewayawa, kwararar sifili)

VFL=Cikakkun wutar lantarki{1} (mafi girman ƙira na yanzu)

Wannan dabara yana bayyana alaƙar da ba ta dace ba zuwa inganci: ƙananan kashi yana nuna ƙa'ida mafi kyau. Kyakkyawan tushen wutar lantarki zai kula da irin ƙarfin lantarki iri ɗaya ba tare da la'akari da kaya ba, cimma ƙa'idar 0%. Tsari-tsare na gaskiya na gaskiya suna yin niyya 1{5}} 5% don ingantattun aikace-aikace{{6}, kodayake kewayon da aka yarda sun bambanta ta tsarin aikace-aikacen masana'antu na iya jure 5-10%, yayin da ainihin kayan aiki na buƙatar ƙasa da 1%.

Yi la'akari da misali mai amfani: Mai canza wutar lantarki yana fitar da 120V ba tare da haɗin kaya ba. Lokacin zana matsakaicin ƙimar halin yanzu, ƙarfin lantarki yana raguwa zuwa 114V. Ƙididdigar ƙa'ida ta haifar: (120-114)/114 × 100=5.26%. Wannan yana nuna matsakaicin ƙa'ida-wanda aka yarda da shi don amfanin masana'antu gabaɗaya amma bai isa ga na'urorin lantarki masu mahimmanci da ke buƙatar kulawa mai ƙarfi ba.

Abubuwan dabarar suna nuna ainihin halayen lantarki. Babu - ƙarfin lantarki mai ɗaukar nauyi yana wakiltar fitowar ƙa'idar tushen tushen ba tare da juriya ko hasarar amsawa daga kwararar yanzu ba. Cikakkun -waddan lissafin wutar lantarki don faɗuwar wutar lantarki a duk ƙetare a cikin hanyar isarwa{4}}juriya na jagora, iskar wutar lantarki, wuraren haɗin gwiwa. Bambancin yana ƙididdige nawa tsarin ainihin ya karkata daga kyakkyawan hali.

Ma'auni guda uku sun cika hoton tsari:

Tsarin layiyana auna daidaiton ƙarfin ƙarfin fitarwa akan bambance-bambancen ƙarfin shigarwa. An bayyana shi azaman canjin kaso a fitarwa a kowane canjin kashi a shigarwar, yana da mahimmanci ga na'urori masu ƙarfi da batir{1} inda ƙarfin wutar lantarki ya ragu yayin fitarwa. Masu kula da layi na inganci suna kula da fitarwa a cikin 0.1% duk da bambancin shigarwar 10-20%.

Dokokin LoadYana ƙididdige daidaiton ƙarfin fitarwa a cikin cikakken kewayon kaya daga sifili zuwa matsakaicin halin yanzu. An bayyana shi azaman rabon bambancin wutar lantarki tsakanin abubuwan da aka sauke da cikakkun abubuwan da aka ɗorawa akan cikakken ƙarfin lantarki. Canza kayan wutar lantarki yawanci suna cimma ka'idojin ɗaukar nauyi 1-3%, yayin da masu sarrafa layi na iya isa ƙasa da 0.1%.

Dogaro da Zazzabiyana nuna kwanciyar hankali na ƙarfin lantarki a cikin kewayon zafin aiki. Abubuwan wutar lantarki suna haifar da zafi mai mahimmanci, kuma nassoshi na wutar lantarki na semiconductor suna canzawa tare da zafin jiki a ƙimar da aka auna a sassa da miliyan a kowane digiri Celsius (ppm/digiri). Tsarukan madaidaici suna buƙatar ƙididdige ƙimar zafin jiki ƙasa da 50 ppm/digiri, ana iya samun su ta hanyar ƙirar ƙira ta rama.

Tsarin wutar lantarki a watsa wutar lantarki yana bayyana yadda kaddarorin wutar lantarki ke yin girma{0}} ƙirar kayan more rayuwa. Layukan watsawa a zahiri suna da juriya, inductance, da capacitance waɗanda ke ci gaba da canza ƙarfin lantarki tare da tsayin su, yana shafar duka girma da kusurwar lokaci. Waɗannan sigogin da aka rarraba suna haifar da ƙayyadaddun bayanan ƙarfin lantarki waɗanda injiniyoyi dole ne su ƙira daidai don amintaccen aikin grid.

Alakar impedance tana sarrafa halayen watsawa. Lokacin da halin yanzu ke gudana ta juriya na layi R, yana haifar da raguwar wutar lantarki a lokaci (IR). A lokaci guda, halin yanzu ta hanyar inductive reactance X yana haifar da raguwar ƙarfin lantarki da ke jagorantar halin yanzu ta digiri 90 (IXL). Susceptance mai ƙarfi yana gabatar da magudanar caji waɗanda ke ɓarna ɓarna a wani ɓangare. The vector sum of these components determines actual sending-end voltage required to achieve desired receiving-end voltage.

Halin wutar lantarki yana tasiri sosai ga tsananin tsari. Nauyin inductive yana haifar da raguwar halin yanzu wanda ke ƙara girman aika da ake buƙata{1}}ƙarshen ƙarfin wutan lantarki, yayin da maɗaukaki masu ƙarfi tare da jagoran halin yanzu na iya sa tura wutar lantarki ƙasa da karɓar ƙarfin lantarki. Wannan al'amari yana bayyana dalilin da ya sa kayan aiki ke ɗaukar bankunan capacitor don gyara abubuwan wutar lantarki{3}} suna rage asarar watsawa da buƙatun ƙa'idojin wutar lantarki a lokaci guda.

Hanyoyi uku na ƙirar ƙirar ƙira suna ba da haɓaka daidaito a farashin rikitarwa:

Gajeren Layi Kimanta(a karkashin 80 km) watsi da capacitance, kula da layi a matsayin jerin juriya da inductance. Wannan samfurin da aka sauƙaƙa yana ba da daidaito ± 5-10% isa don tsarawa na farko amma ya kasa ɗaukar mahimman kuzari a cikin dogon layi.

Matsakaici Layi Kimanin(kilomita 80-250) yana rarraba ƙarfin shunt daidai lokacin aikawa da karɓar ƙarewa, yana samar da da'ira mara kyau π. Daidaitawa yana inganta zuwa ± 2-3%, yana sa ya dace da yawancin nazarin tsarin rarrabawa.

Tsawon Layi Mai tsayi(sama da kilomita 250) yana rarraba impedance da shigar da su daidai tare da tsayin layin, yana buƙatar mafita na bambancin daidaito. Wannan hanya mafi dacewa ta zama mahimmanci don watsa wutar lantarki mai girma - inda ko da kurakurai 1% ke wakiltar megawatts na wuta da manyan karkatattun wutar lantarki.

Misalin watsawa mai amfani yana kwatanta waɗannan ra'ayoyin: Layin 138 kV, layin kilomita 100 yana ba da aikin ɗaukar nauyin masana'antu 50 MW a 0.85 na wutar lantarki. Siffofin layi: juriya 0.15 Ω/km, amsawar inductive 0.40 Ω/km. Yin amfani da matsakaicin - ƙirar layin layi, injiniyoyi suna ƙididdige ƙarfin turawa{9}}ƙarshen wutar lantarki dole ne ya zama 142.3 kV don isar da 138 kV a ƙarshen karɓar{12}} tsari na 3.1%. Ba tare da gyaran wutar lantarki ba, ƙa'ida zata wuce 5%, mai yuwuwar haifar da rashin aiki na kayan aiki yayin buƙatu kololuwa.

Abubuwan amfani na gaske suna fuskantar ƙarin rikitarwa: nauyi mai canzawa a cikin yini, tasirin zafin jiki akan juriya mai jagora, da haɗakar da tsararraki masu rarraba wanda zai iya juyar da tunanin wutar lantarki na gargajiya. Haɓaka shigar da sabbin hanyoyin samar da makamashi da motocin lantarki ya sanya ka'idojin wutar lantarki a cikin ƙananan cibiyoyin rarraba wutar lantarki suna ƙara rikiɗawa, suna buƙatar sabbin dabaru fiye da hanyoyin gargajiya.

Yayin da ƙa'idar m ke bayyana halayen tsarin halitta, na'urorin sarrafawa masu aiki suna sarrafa wutar lantarki da gangan ta hanyoyi daban-daban. Kowace fasaha tana ba da fa'idodi daban-daban waɗanda suka dace da takamaiman aikace-aikace.

Masu tsara layin layi suna aiki azaman masu juzu'i masu iko da lantarki. Suna amfani da na'urar wucewa mai aiki kamar MOSFET ko BJT wanda babban amplifier - riba ke sarrafawa, kwatanta wutar lantarki ta ciki tare da samfurin ƙarfin fitarwa don fitar da bambancinsu zuwa sifili. Wannan madauki na amsa yana ci gaba da daidaita juriyar abubuwan wucewa don ramawa ga canje-canjen kaya ko shigarwa.

Ƙa'idar aiki tana haifar da ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun bayanai: masu sarrafa linzamin kwamfuta za su iya rage ƙarfin wutar lantarki kawai, kuma wuce haddi na shigarwa -Bambancin fitowar yana watse azaman zafi. Don shigarwar 12V da ke samar da fitowar 5V a 2A, mai sarrafa yana watsewa (12-5)×{6}} W azaman zafi yayin isar da 10W kawai zuwa nauyin 42% inganci. Wannan nauyin zafi yana buƙatar zafi wanda ke ƙara farashi, girman, da ƙalubalen sarrafa zafi.

Duk da gazawar ingantaccen aiki, masu sarrafa layi suna mamaye aikace-aikacen da ke kimanta ƙarfinsu:

Karancin fitowar amo: Babu mitoci masu sauyawa da ke gabatar da tsangwama ko hasken wuta, mai mahimmanci ga da'irori na analog, kayan sauti, da tsarin RF

Amsa mai saurin wucewaBayanin analog kawai yana amsawa a cikin micro seconds don ɗaukar canje-canje, manufa don microprocessors tare da saurin canza buƙatun yanzu.

Zane mai sauƙi: Ana buƙatar kawai shigarwa / fitarwa capacitors fiye da mai tsara IC, ƙirar layi na rage girman sararin allo da ƙididdigar abubuwan

Maras tsada: Ƙirƙirar ƙira mai girma- da sassauƙan da'irori suna sa masu kula da layi su zama zaɓi mafi tattalin arziki don matsakaicin matakan wutar lantarki

LM7805, mai sarrafa layin layi na 5V, yana misalta nau'in. Kudinsa ƙasa da $0.50 a girma, yana ba da har zuwa 1.5A tare da ƙa'idar layin 50-60mV na yau da kullun da tsarin ɗaukar nauyi 100mV. Don na'urorin baturi{9}}waɗanda ƙarfin shigar da wutar lantarki ya yi daidai da buƙatun fitarwa, ƙananan masu sarrafa layi (LDO) suna aiki tare da bambance-bambancen shigarwa-fitarwa ƙasa da 300mV, rage sharar gida yayin riƙe fa'idodin amo.

Ma'aikata masu sauyawa suna amfani da wata hanya ta daban: da sauri canza abubuwan ajiyar makamashi (inductor da capacitors) don canja wurin wuta daga shigarwa zuwa fitarwa. Masu canza canjin suna samun inganci mai girma{1}}sau da yawa 85-95%-musamman mahimmi lokacin da akwai bambance-bambancen ƙarfin shigarwa-fitarwa, amma suna buƙatar ƙarin hadaddun abubuwan haɗin gwiwa da haifar da amo.

Topologies na asali guda uku suna magance buƙatun tuba daban-daban:

Buck (Mataki{0}}asa)masu juyawa suna rage ƙarfin lantarki yadda ya kamata. Canji yana musanya tsakanin haɗa inductor zuwa shigar da wutar lantarki da ƙasa a mitoci daga 100 kHz zuwa MHz da yawa. Lokacin da aka haɗa da shigarwa, halin yanzu yana haɓakawa a cikin inductor, yana adana makamashi a cikin filin maganadisu. Lokacin da aka canza zuwa ƙasa, filin da ke rushewa yana fitar da makamashi zuwa fitarwa. Zagayen aiki (kashi na lokacin da aka haɗa da shigarwa) yana sarrafa wutar lantarki kai tsaye: VOUT=VIN × D.

Haɓakawa (Mataki{0}} Sama)masu juyawa suna haɓaka ƙarfin lantarki ta amfani da ƙarin sauyawa. Lokacin da sauyawa ya haɗa inductor zuwa ƙasa, halin yanzu yana haɓakawa. Buɗe mai kunnawa yana tilasta inductor na yanzu ta hanyar diode fitarwa, ƙara zuwa ƙarfin shigarwa. Ƙarfafa masu juyawa suna ƙarfafa fitilun baya na LED, baturi{3}} na'urori masu ƙarfi waɗanda ke buƙatar ƙarfin ƙarfin lantarki, da tsarin birki na sabuntawa.

Buck{0}} Ƙarfafamasu juyawa suna ba da ƙarfin fitarwa ko dai sama ko ƙasa da shigarwa, masu mahimmanci ga aikace-aikacen baturi inda ƙarfin lantarki ya bambanta a duk lokacin fitarwa. Batir lithium sel guda - yana fitowa daga 4.2V da aka cika cikakke zuwa 3.0V ya ƙare; Buck{4}}Mai canza canji yana kula da tsayayyen fitarwa na 3.3V a cikin wannan kewayon.

Masu gudanarwa na sauyawa suna buƙatar la'akari da ƙira a hankali waɗanda masu kula da layi suka guje wa:

Layout hankali: Maɗaukaki -yawawan sauyawa yana haifar da filayen lantarki waɗanda zasu iya haɗawa zuwa da'irori kusa. Dole ne a sanya capacitors na shigarwa da fitarwa kusa da mai sarrafa, jiragen saman ƙasa suna buƙatar rarrabuwa a hankali, da abubuwan daidaitawar inductor.

Zaɓin ɓangaren: Ƙimar inductor, ƙimar halin yanzu, da halayen jikewa kai tsaye suna shafar inganci da haɓakar fitarwa. Zaɓin capacitor dole ne yayi lissafin ESR (Equivalent Series Resistance) a mitoci masu sauyawa.

Sarrafa madauki kwanciyar hankali: Cibiyoyin ramuwa na amsa suna buƙatar nazarin amsa mitar don tabbatar da aiki mai ƙarfi a duk yanayin kaya yayin da ake ci gaba da mayar da martani mai sauri.

Masu daidaita sauyawa na zamani suna haɗa haɓaka ayyuka don sauƙaƙe aiwatarwa. Texas Instruments 'Simple Switcher series da Analog Devices' μModule regulators sun haɗa na'urar inductor da sarrafawa a cikin fakiti ɗaya, yana buƙatar shigarwar shigarwa/fitarwa na waje kawai.

Ferroresonant Transformerswakiltar wata hanya ta musamman ta tsarin ƙa'ida. Waɗannan na'urorin wuta suna aiki tare da magnetic core ɗinsu da gangan cike da yawancin zagayowar AC, suna ƙirƙirar wutar lantarki kusan akai-akai duk da bambance-bambancen shigarwar shigarwa, yayin da suke tace jituwa tare da samar da ɗan gajeren tafiya{1}ta hanyar iyawa yayin asarar wuta. Sauƙaƙan su da rashin ƙarfi sun dace da yanayin masana'antu masu tsauri, amma ƙarancin inganci (60-80%) da ƙayyadaddun ƙayyadaddun ƙirar zafi. Arc walda wutar lantarki da fitarwa fitilu suna amfana daga halayen ferroresonant.

Akan - Masu Canjin Taɓa Load (OLTCs)samar da ka'idojin wutar lantarki don masu rarraba wutar lantarki. Taps a cikin jerin iskar taswira suna ba da damar sarrafa lantarki don daidaita yanayin juyi yayin da ake ƙarfafawa, haɓakawa ko bucking ƙarfin shigar da bayanai don kula da fitarwa cikin ƙayyadaddun bayanai. Abubuwan amfani suna amfani da OLTCs a wuraren zama don rama faɗuwar wutar lantarki tare da masu ciyar da rarrabawa, yawanci suna aiki a cikin matakan 32 na 0.625% daidaitawa don kula da ± 5% ƙarfin lantarki.

Voltage Regulation

Zaɓi da aiwatar da ƙa'idodin wutar lantarki na buƙatar ƙima na tsari na abubuwan da suka dogara da juna da yawa. Zaɓuɓɓukan da ba daidai ba suna haifar da gazawar tsari wanda ƙila ba zai bayyana ba har sai an tura filin, ƙirƙirar gyare-gyare masu tsada ko sake fasalin filin.

Gudanar da Ƙararren Ƙararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwaƙwalwa na Ƙaƙa ) ya yi

Rarraba zafi na masu tsara layin layi yana biye da sauƙi amma mara gafara: PDISS=(VIN - VOUT) × ILOAD. Mai sarrafawa yana taka 24V zuwa 5V yayin samar da 2A yana rarraba 38W- fiye da yawancin abubuwan samar da wutar lantarki. Wannan nauyin zafi yana buƙatar zafi mai zafi wanda injiniyoyi sukan raina.

Junction -zuwa - yanayin juriya na thermal (θJC) da harka{2}}zuwa{3}} juriya na yanayi (θCA) suna ƙayyade zafin aiki: TJ=TA + (θJC + θCA) × PDISS. Idan zafin mahaɗin ya wuce ƙididdiga (yawanci 125{16}}150 digiri), mai sarrafa ya shiga kashewar zafi, yana tarwatsa tsarin aiki. Don misalin 38W tare da θJC=2 digiri /W da θCA=15 digiri /W (daukacin matsakaicin zafi), zafin mahaɗa yana tashi zuwa digiri 25 + 17 × 38=671 digiri - jiki ba zai yiwu ba. Wannan yanayin yana buƙatar ko dai tilasta iska ta rage θCA zuwa digiri 4 / W, ko canzawa zuwa mafi inganci topology.

Shigar da -Bambancin Fitar da Wutar Lantarki na Jagorar Topology Zaɓin

Matsakaicin jujjuya wutar lantarki da gaske yana ƙayyadaddun yuwuwar hanyoyi daban-daban. Ma'aikatan layi suna yin hankali lokacin da (VIN - VOUT) ya kasance ƙarami - yawanci ƙarƙashin 5V- kuma yana fitar da matsakaicin halin yanzu. Bayan waɗannan ƙofofin, sauye-sauyen fa'idodin aiki sun mamaye hadaddun su.

Yi la'akari da yanayi guda uku don samar da 5V a 2A:

9V shigar: Linear yana watsawa 8W (64% mai inganci), canza 1.5W (93% ingantaccen). Layin layi ya kasance mai yiwuwa idan amo ya shafi al'amuran da sarari yana ba da damar zafi.

24V shigar: Linear yana watsawa 38W (26% mai inganci), canza 2.5W (91% ingantaccen). Canjawa a sarari mafi girma{5}} Hanyar layi ba ta da amfani ba tare da sanyaya tilas ba.

3.7V Li{1}} baturi: Linear ba zai iya haɓaka ƙarfin lantarki ba; buck{0}} ana buƙatar haɓaka canjin canji. Wannan yana wakiltar bambance-bambancen iyawa na asali, ba kawai inganci ba.

Load da Halin Ƙarfafan Halittu na Yanzu

Tsarin dijital na zamani yana gabatar da bayanan martaba masu ƙalubale. Canje-canjen Microprocessors tsakanin jihohin barci suna zana milliamps da cikakken aikin wutar lantarki da ke buƙatar amperes da yawa a cikin daƙiƙa guda. Manyan na'urori masu sarrafa wutar lantarki{{3} suna kewaye kansu da ɗimbin guntuwar DrMOS{4}} haɗe-haɗen direba da kayan aikin FET masu ƙarfi{5}waɗanda aka haɗa su a layi daya don samar da isassun na yanzu da kiyaye inganci ƙasa da matsakaicin kima.

Amsa na wucin gadi{0}}yaya saurin fitarwar wutar lantarki ke dawowa daga canje-canjen kaya kwatsam{1}} ya dogara da dalilai da yawa:

Capacitance fitarwa: Manyan capacitors suna ba da ƙarin cajin tafki a lokacin wucin gadi, iyakance tsomawar wutar lantarki, amma jinkirin amsa madauki. Mahimman ƙididdiga sun bambanta daga 10μF don ƙananan -LDOs na yanzu zuwa 1000μF don masu sarrafa sauyawa masu yawa{{4}amp.

bandwidth madauki martani: madaukai masu sauri suna gyara kurakurai da sauri amma haɗarin rashin kwanciyar hankali idan ba a biya su daidai ba. Canza madaukai masu sarrafawa yawanci suna aiki a 1/10th zuwa 1/5th mitar sauyawa.

ESR na fitarwa capacitor: The resistive bangaren capacitor impedance kayyade nan da nan irin ƙarfin lantarki mataki a lokacin load transients. Ƙananan yumbura - ESR (a ƙarƙashin 10mΩ) ko masu ƙarfin polymer suna rage wannan tasirin.

Ƙayyadaddun ƙayyadaddun bayanai suna ƙididdige martani na wucin gadi azaman rarrabuwar wutar lantarki da lokacin dawowa don ƙayyadadden matakin kaya. Masu kula da canza canjin inganci suna kula da fitarwa a cikin 2-3% yayin matakin nauyin 50%, suna murmurewa zuwa tsari tsakanin 50-100 microsecond.

Kewayen Aiki Na Muhalli Yana Taƙaita Zaɓan Na'urar

Dole ne masu sarrafa wutar lantarki su yi aiki da dogaro a kan iyakar zafin jiki, bambance-bambancen ƙarfin shigarwa, da yanayin damuwa na inji musamman ga yanayin aikace-aikacen su.

Kayan aikin masana'antu na iya aiki daga -digiri 40 zuwa digiri +85 . Samfuran masu amfani yawanci suna ganin digiri 0 zuwa digiri +70 . Mahalli na motoci suna buƙatar -40 digiri zuwa ƙarfin digiri +125 tare da ƙarin buƙatu don dacewa da lantarki da juriya na girgiza injina. Waɗannan ƙididdigan ba saɓani na aminci ba ne - abubuwan da ke gazawa lokacin da aka wuce ƙayyadaddun bayanai.

Zazzabi yana rinjayar duk sigogi masu daidaitawa. Nassoshi na ƙarfin lantarki suna motsawa tare da zafin jiki a ƙimar da aka ƙayyade a ppm/digiri. Tunani tare da 50 ppm/digiri coefficient yana canza 0.005% a kowane digiri{4}} da alama ƙarami, amma yana haifar da kuskure 0.4% a cikin kewayon digiri 80. Don tsarin 5V, wannan yana wakiltar bambancin 20mV, mai yuwuwar keta ƙaƙƙarfan buƙatun haƙuri. Madaidaicin aikace-aikacen yana amfani da yanayin zafi{11}} ramawa nassoshin da suka cimma ƙasa da 10 ppm/digiri.

Input irin ƙarfin lantarki bambancin ikon gwajin tsarin layin. Na'urorin da ke da wutar lantarki suna ganin lalatawar wutar lantarki a duk lokacin fitarwa{2}} fakitin NiMH guda huɗu- daga 5.6V sabo zuwa 4.0V ya ƙare. Na'urorin kera motoci suna jure sanyi{7}} crank (7V) da lodi{9}}juji (40V+). AC{13}} dole ne kayan aikin da aka yi amfani da su su kula da yanayin launin ruwan kasa da wuce gona da iri. Zaɓin mai gudanarwa dole ne ya ƙunshi cikakken kewayon shigarwa da gefe.

Aiwatar da gaskiya ta duniya{0} tana nuna yadda ƙa'idodin wutar lantarki ke shafar farashin aiki kai tsaye, amincin samfur, da matsayi na gasa a cikin masana'antu.

Cibiyoyin bayanai masu ƙarfi suna cinye 1{1}2% na wutar lantarki na duniya{3} kusan awanni 200 na terawatt a shekara. Hatta ingantaccen ingantaccen aiki yana fassara zuwa babban tanadin aiki da tasirin muhalli.

Fadada sashin cibiyar bayanai mai tuƙi lissafin gajimare da sabis na dijital ya ƙãra tura mai sarrafa wutar lantarki saboda mahimmancin buƙatar kwanciyar hankali a cikin kayan aikin. Kayan aikin megawatt 10 na yau da kullun yana kashe $7{5}} miliyan 8 kowace shekara akan wutar lantarki akan farashin masana'antu. Haɓaka ingantaccen aiki na 2%{6} wanda za'a iya samu ta hanyar ingantaccen tsarin wutar lantarki yana rage asarar juzu'i-yana adana $140,000-160,000 kowace shekara kowace makaman.

Cibiyoyin bayanai na Google suna amfani da na'urori masu sarrafa wutar lantarki na al'ada (VRMs) da aka sanya su nan da nan kusa da na'urori masu sarrafa sabar, suna rage asarar juriya a isar da wutar lantarki. Wannan tsarin "kusa{1}}zuwa{2}load" yana rage ƙarfin rarrabawa daga 12V zuwa ƙarfin wutar lantarki mai mahimmanci (0.7-1.2V) tare da inganci 92-94% akan 88-90% don ƙira ta al'ada. A duk faɗin abubuwan more rayuwa na duniya na Google, wannan yana samar da dubun-dubatar miliyoyin a cikin tanadin shekara-shekara.

Kalubalen injiniya yana ƙaruwa tare da yawan ƙarfin sarrafawa. CPUs na zamani na uwar garken suna cinye 200-350W da aka tattara a cikin yanki mai mutuƙar 50mm × 50mm{8}}ƙarfin ƙarfin da ke gabatowa 100 W/cm². Isar da wannan ƙarfin yayin da ake riƙe ƙarfin lantarki tsakanin ± 50mV yana buƙatar ƙayyadaddun ƙa'idodi da yawa{10} tare da daidaitaccen rabawa na yanzu da amsa mai sauri. Jimlar farashi don babban{12}}ƙarshen wutar lantarkin sabar uwar garke ya zarce $150, yana wakiltar gagarumin kuɗaɗen kuɗaɗen kayan aiki wanda ke ba da hujja kawai ta hanyar dogaro da fa'idodin inganci.

Tsarukan masana'anta na atomatik suna haɗa dubunnan na'urori masu auna firikwensin, masu kunnawa, da tsarin sarrafawa waɗanda aiki tare da su ya dogara da ƙarfin ƙarfi. Rashin daidaituwar wutar lantarki yana haifar da rashin daidaituwa, lahani mai inganci, da lalacewar kayan aiki.

Wurin ƙirƙira semiconductor yana wakiltar wani matsanancin hali. Kayan aikin daukar hoto yana buƙatar nanometer{1}}madaidaicin ma'auni a kiyaye cikin sa'o'i{2}dogayen hanyoyin fallasa. Bambance-bambancen wutar lantarki yana haifar da jinkirin lokaci na microsecond a cikin masu kula da motoci na iya ɓata tsarin abin rufe fuska, goge wafer ɗin da ke kan $5,000-10,000 kowanne. Fab{9}}tsararrun tsarin wutar lantarki mai fa'ida wanda ke amfani da tacewa mai aiki da matakan daidaitawa da yawa, daidaitattun matakai ne, wanda ke jawo asarar miliyoyin don shigarwa amma yana hana asara mai alaƙa da wani tsari mai girma.

Samfurin da ya fi sauƙi yana fuskantar batutuwa iri ɗaya a rage ma'auni. Wani mai siyar da kayan aikin mota da ke aiki da cibiyoyin injina na CNC ya gano kurakuran ma'auni na tsaka-tsakin da aka samo zuwa sags na wutar lantarki yayin canjin kayan aiki. Dips na 3-5% na ƙarfin lantarki ya daɗe mil 100-200 kawai amma tsarin kula da servo ya rikice, yana haifar da kurakuran matsayi da suka wuce haƙuri. Shigar da masu sarrafa wutar lantarki tare da kewayon gyara 10-15% da<20ms response time eliminated defects, justifying the $30,000 equipment cost through prevention of $200,000+ annual scrap costs.

Tsarin wutar lantarki a cikin ƙananan cibiyoyin sadarwa na rarraba wutar lantarki - ya ƙaru da yawa saboda faɗaɗa hanyoyin samar da makamashi da motocin lantarki, suna buƙatar sabbin dabaru don sarrafa bayanan bayanan wutar lantarki yadda ya kamata. Ƙarfafawar hasken rana da iska suna gabatar da kwararar wutar lantarki ta hanyoyi biyu da saurin fitarwa wanda ba a tsara kayan aikin grid na gargajiya don ɗauka ba.

Mai ba da abinci na kewayen birni ba tare da ka'idar wutar lantarki ba na iya ganin hauhawar wutar lantarki 8-10% a maki tare da samar da hasken rana mai nauyi yayin tsakar rana, keta iyakokin wutar lantarki da yuwuwar tilasta masu canza hasken rana don rage fitarwa. Shigar da masu kula da wutar lantarki na layi (LVRs) a wuraren dabaru tare da mai ciyarwa yana kiyaye ƙarfin lantarki tsakanin iyakokin ± 5%, yana barin matsakaicin amfani da makamashi mai sabuntawa.

Tattalin Arziki yana goyon bayan zuba jari na tsari. Wani abin amfani da ke kashe dala 500,000 don shigar da LVRs akan mai ciyarwa yana ba da damar 2-3 MW na ƙarin ƙarfin hasken rana da aka rarraba wanda in ba haka ba zai buƙaci dala miliyan 2-3 a cikin haɓaka tashar tashar ko sake fasalin ciyarwa. Tsarin tsari yana ba da 4-6 × dawowa kan saka hannun jari yayin da ke tallafawa burin karɓar makamashi mai sabuntawa.

Hakanan tsarin ajiyar makamashin baturi yana buƙatar ingantaccen tsarin wutar lantarki. Grid{1}} lithium mai nauyin MWh 10{3}} ion shigarwa yana samun bambance-bambancen ƙarfin lantarki fiye da 20% a duk tsawon caji{5}} zagayowar fitar da kaya. Dole ne tsarin jujjuyawar wutar lantarki ya daidaita ƙarfin wutar lantarki na DC zuwa inverter yayin da ake kiyaye ingantaccen ƙira{7} na yau da kullun sun cimma inganci 96-97% ta amfani da matakan sauya matakan matakai uku tare da sarrafa ƙarfin lantarki.

Halayen ƙarfin lantarki na nau'ikan sinadarai na baturi daban-daban suna yin tasiri kai tsaye ga ƙa'idodin ƙa'ida, wanda ke bayyana dalilin da yasa tattaunawa a kusalithium vs alkaline baturisau da yawa a tsakiya kan bayanan martaba. Kwayoyin lithium suna kula da ƙarancin wutar lantarki (3.0{5}}3.7V tare da ƙaramin sag) a cikin mafi yawan zagayowar fitar su, yayin da sel alkaline ke nuna ci gaba da raguwar ƙarfin lantarki daga 1.6V zuwa 0.9V. Wannan babban bambance-bambancen ya sa batir lithium ya fi na na'urori masu matsananciyar ka'idojin wutar lantarki{7}} kyamarori na dijital, na'urorin likitanci, da na'urorin lantarki masu ɗaukar nauyi waɗanda ke daina aiki lokacin da ƙarfin wutar lantarki ya faɗi ƙasa ƙayyadaddun ƙofa. Batura na alkaline suna aiki da kyau kawai a aikace-aikace masu jure wa faɗuwar wutar lantarki ko waɗanda ke amfani da ƙaƙƙarfan ƙa'idar haɓakawa don rama raguwar lanƙwan ƙarfin lantarki.

Voltage Regulation

Rashin gazawar sarrafa wutar lantarki yana bayyana ta hanyoyi masu dabara waɗanda ke rikitar da matsala. Binciken tsari na tsari yana gudana ta hanyar bayyanar cututtuka zuwa tushen dalilai.

Alama: Sake saitin Kayan Aiki ko Halayen Kuskure

Lokacin da tsarin dijital ya nuna sake saitin da ba a bayyana ba, gurbatattun bayanai, ko aiki mara daidaituwa, rashin isasshen ƙarfin lantarki yayin ɗaukar nauyi yakan haifar da matsala. Microcontrollers yawanci suna buƙatar ci gaba da ƙarfin lantarki sama da 90{2}95% na ƙididdiga yayin aiki - a taƙaice faduwa ƙasa da wannan madaidaicin yana haifar da gano launin ruwan kasa da sake saitin tsarin.

Tabbatarwa yana buƙatar ma'aunin oscilloscope na samar da wutar lantarki yayin aiki na yau da kullun, musamman ɗaukar al'amuran wucin gadi. Saita faɗakarwa don ɗaukar ƙarfin lantarki ya faɗi ƙasa da 95% na ƙididdigewa, tare da isasshen zurfin ƙwaƙwalwar ajiya don yin rikodin millise seconds da yawa kafin da bayan taron. Idan masu wucewa sun bayyana suna da alaƙa tare da canje-canje masu nauyi (motoci masu farawa, masu watsawa suna kunnawa, da sauransu), an tabbatar da rashin isa ga ƙa'ida.

Ƙaddamarwa ya dogara da ko batun ya samo asali ne daga iyakoki na sarrafawa ko rashin isasshen ƙarfin fitarwa. Ƙara ƙarfin fitarwa yana samar da ƙarin tafki na makamashi na wucin gadi{1}}yawan ƙarfin ƙarfin ninki biyu yana rage girman tsomawar wutar lantarki. Idan ƙarfin ƙarfin ƙarfin yana nuna raguwar dawowa, mai yiwuwa madaidaicin madauki na madauki ba zai iya amsawa da sauri ba, yana buƙatar zaɓin mai sarrafa da sauri ko wurin gida{3}}