Uhlelo Lokupholisa Olusebenzayo Lwamashaja Anamandla Aphezulu
Isidingo sokushaja okusheshayo siyaqhubeka sikhula ngokukhula kokusetshenziswa kwezimoto zikagesi, amadivayisi ezimboni asekelwe ebhethri, kanye nengqalasizinda yamandla avuselelekayo. Amashaja anamandla amakhulu—kungakhathaliseki ukuthi ezimoto zikagesi (ama-EV), amabhethri okugcina amandla, noma izinhlelo zokusebenza zokuxhumana—aklanyelwe ukuletha amandla aphezulu ngesikhathi esifushane. Kodwa-ke, kunomphumela owodwa wobuchwepheshe ohlala ulandela: ukushisa. Lapho amandla ecutshungulwa kakhulu, kulapho kulahlekelwa khona amandla njengokushisa ezingxenyeni zikagesi. Ngakho-ke, izinhlelo zokupholisa ezisebenzayo zibalulekile ekwakhiweni kwamashaja anamandla amakhulu ukuze kulondolozwe ukusebenza, ukuthembeka, kanye nokuphepha.
Kungani Amashaja Anamandla Aphezulu Eshisa Ngokushesha Kangaka?
Ukushisa kumashaja anamandla aphezulu kuvela emithonjeni eminingana eyinhloko. Okokuqala, ukulahlekelwa kokuqhuba amandla kuma-semiconductors wamandla (ama-MOSFET, ama-IGBT, ama-diode), izintambo, kanye nezixhumi. Okwesibili, ukulahlekelwa kokushintsha, okuyikushisa okukhiqizwa lapho izingxenye zamandla zivula futhi zivala imisinga kumaza aphezulu. Okwesithathu, ukulahlekelwa izingxenye zamagnetic ezifana nama-transformer nama-inductor ngenxa ye-core hysteresis kanye nemisinga ye-eddy. Okwesine, kumashaja anamuhla, anamandla aphezulu, amabanga phakathi kwezingxenye aya ngokuya encipha, okwenza kube nzima kakhulu ukuthi ukushisa kuphume ngokwemvelo.
Uma ukushisa kungaphathwa kahle, imiphumela iba mibi kakhulu: ukwehla kokusebenza kahle, ukuqhekeka kwamandla kagesi kuyaphoqeleka, isikhathi sokuphila kwezingxenye siyancishiswa, futhi ingozi yokwehluleka iyanda. Ezimweni ezimbi kakhulu, amazinga okushisa aphezulu kakhulu angaholela ekuqhekekeni kokufakwa kokushisa, ukwehluleka kwe-solder, noma ngisho nezehlakalo zokuphepha. Ngakho-ke, ukupholisa akuyona nje into ewusizo, kodwa kuyingxenye eyinhloko yesistimu.
Ukupholisa Okungashukumi vs Ukupholisa Okusebenzayo
Ukupholisa okungenazihibe kuncike ekudlulisweni kokushisa kwemvelo: ama-heatsink amakhulu, amaphiko okupholisa, izinto ezisebenzisa ugesi ophezulu, kanye nokugeleza komoya kwemvelo. Le ndlela ilula futhi inengozi encane ngoba ayinazo izingxenye ezihambayo. Kodwa-ke, kumashaja anamandla amakhulu adinga usayizi omncane, ukupholisa okungenazihibe ngokuvamile akwanele.
Ukupholisa okusebenzayo kunezela indlela yokuphoqelela ukudluliselwa kokushisa—isibonelo, ifeni, i-blower, iphampu yoketshezi, noma ngisho ne-thermoelectric cooler kwezinye izimo. Izinzuzo yikhono lokukhipha ukushisa ngokushesha ngevolumu encane, okuvumela ukulawulwa kokushisa okunembile kakhudlwana. Okubi kufaka phakathi ubunzima obandayo, ukusetshenziswa kwamandla okwengeziwe, umsindo ongaba khona, kanye nengozi yokwehluleka kwezingxenye zemishini.
Empeleni, amashaja amaningi anamandla amakhulu asebenzisa inhlanganisela ye-passive kanye ne-active: i-heatsink njengendlela eyinhloko yokuqhuba ukushisa, kanye nefeni noma uketshezi lokuthutha ukushisa ngaphandle kwesistimu.
Ukwakhiwa Kwesistimu Yokupholisa Okusebenzayo
Ngokuvamile, ukupholisa okusebenzayo kumashaja anamandla aphezulu kuqukethe amabhlogo amaningana:
1. Imithombo yokushisa: amamojula kagesi (i-rectifier, i-PFC, i-DC-DC), izingxenye zikagesi, kanye nezixhumi zamandla aphezulu.
2. Indlela yokuqhuba: i-thermal pad, i-thermal grease, i-baseplate, i-heatsink, noma i-cold plate.
3. Imidiya yokuthwala ukushisa: umoya (ukupholisa umoya) noma uketshezi (ukupholisa uketshezi).
4. I-Actuator: ifeni/umshayi womoya noma iphampu.
5. Izinzwa nezilawuli: izinzwa zokushisa (NTC, PT100/PT1000), izinzwa zokugeleza, izinzwa zokucindezela, kanye nama-algorithm okulawula (i-fan PWM, ukulawula iphampu).
6. Ukushabalalisa ukushisa: i-heat exchanger, i-radiator, noma i-exhaust duct.
Impumelelo yesistimu ayixhomekile ekukhetheni amafeni noma amaphampu kuphela, kodwa nasekuklanyweni kokushisa okuphelele: ukwakheka kwezingxenye, izindlela zomoya/uketshezi, ukumelana nokushisa phakathi kwezingqimba, kanye namasu okulawula njengoba imithwalo ishintsha.
Ukupholisa Umoya Okusebenzayo (Ifeni/Isivutheli)
Ukupholisa umoya osebenzayo kuyisisombululo esivame kakhulu ngenxa yezindleko zaso eziphansi kanye nokugcinwa okuphansi. Ifeni noma umshayeli uphoqa umoya phezu kwe-heatsink nendawo efudumele, okwandisa izinga lokuguquguquka komoya. Kumashaja anamandla aphezulu, ukwakheka komoya okucophelelayo kubalulekile ukuze kugwenywe "izindawo ezishisayo" ezibangelwa ukugeleza okungalingani.
Ezinye izinto ezibalulekile okufanele uzicabangele ekupholiseni umoya osebenzayo:
– Uhlobo lwefeni: amafeni e-axial afanelekela ukugeleza okukhulu okunomfutho ophansi we-static, kuyilapho ama-blower/centrifugal engcono ezinhlelweni ezinezindlela zomoya ezincane noma izihlungi ezinezela ukumelana.
– Ukucindezela okuqinile: ama-heatsink aminyene kanye nezihlungi zothuli zidinga amafeni anokucindezela okuphezulu okuqinile ukuze agcine ukugeleza.
– Ukuphathwa kothuli: Amashaja afakwe ezindaweni zezimboni noma eceleni komgwaqo asengozini yokutheleleka uthuli. Izihlungi ziyasiza, kodwa zandisa ukumelana nokugeleza kwamanzi futhi kufanele zicatshangelwe kusukela ekuqaleni.
– Umsindo: Abalandeli abasheshayo bakhipha umsindo. Ukulawula kwe-PWM okuguquguqukayo kungalinganisela ukupholisa kanye nenduduzo.
– Ukuthembeka: Abalandeli banempilo ethile yokuthwala. Ngezinhlelo zokusebenza ezibalulekile, ama-fan aphindaphindayo noma amasu okugxeka avame ukusetshenziswa uma kwenzeka ukwehluleka kwabalandeli.
Ukupholisa umoya okusebenzayo kufanelekela amashaja anamandla aphakathi kuya kwaphezulu, ikakhulukazi lapho imikhawulo yokushisa kwezingxenye isengafinyelelwa ngaphandle kwesidingo sesistimu yoketshezi.
Ukupholisa Okusebenzayo Koketshezi
Kumashaja anamandla aphezulu kakhulu (isb., ukushaja okusheshayo kwe-EV okunamandla amakhulu ama-kilowatts) noma imiklamo emincane kakhulu, ukupholisa uketshezi kuyindlela engcono kakhulu. Uketshezi lunamandla okushisa angcono kanye nokuqhuba ukushisa kunomoya, okuwavumela ukuthi adlulise ukushisa okukhulu ngesivinini sokugeleza esincane.
Ukucushwa okujwayelekile kokupholisa uketshezi:
– Ipuleti elibandayo: ipuleti lokupholisa elinamathiselwe kumoduli yamandla; uketshezi lugeleza ngaphakathi kweziteshi ukuze lumunce ukushisa.
– Iphampu: ilawula izinga lokugeleza ukuqinisekisa ukudluliselwa okwanele kokushisa.
– I-radiator/heat exchanger: isusa ukushisa kusuka oketshezini kuya emoyeni wangaphandle, imvamisa isebenzisa ifeni.
– Amadamu okugcina amanzi kanye nezinzwa: zokuqina kwevolumu, ukukhipha igesi, kanye nokuqapha.
Izinzuzo zokupholisa uketshezi:
– Amandla aphezulu okususa ukushisa kanye nokushisa okuzinzile.
- Yehlisa usayizi we-heatsink futhi ivumela amandla amaningi.
– Ukusatshalaliswa kokupholisa okulinganayo, okufanelekela amamojula ahambisanayo.
Inselele:
– Ingozi yokuvuza kanye nesidingo sokuvala kahle.
– Ukwelashwa koketshezi (ukugqwala, ukukhula kwamagciwane ezinhlelweni ezithile).
– Ubunzima obukhulu bemishini kanye nezindleko.
– Umklamo wokuphepha uyadingeka uma uketshezi luhambisa umoya.
Izinhlelo eziningi zesimanje zisebenzisa ama-coolant asekelwe emanzini-glycol noma uketshezi olukhethekile lwe-dielectric kuye ngezidingo zokushisa kukagesi kanye nendawo yokusebenza.
Ukulawula Ukushisa: Okungaphezu Kokuvula Ifeni
Uhlelo oluhle lokupholisa olusebenzayo alusebenzi nje "ngokuvula/ukuvala." Ludinga ukulawula okuguquguqukayo okusekelwe kunzwa. Amasu avamile afaka:
– I-loop yokulawula esekelwe ekushiseni: ifeni/iphampu ikhuliswa ngezinyathelo ngokuya ngokushisa kwe-heatsink noma i-semiconductor junction (kulinganiselwa ngemodeli).
– Ukwehliswa kwamandla: uma izinga lokushisa lisondela emkhawulweni, ishaja yehlisa amandla okukhipha ukuze ivikele izingxenye.
– Ukutholwa kwephutha: kuthola ifeni ebhajwe, ukugeleza koketshezi okuphansi, isihlungi esivalekile, noma irediyetha eshisa kakhulu.
– Ukubikezela umthwalo: Kumashaja e-EV, iphrofayili yokushaja iyashintsha (CC-CV). Ukulawula ukushisa kungaba wusizo ekuvimbeleni ukukhuphuka kwezinga lokushisa.
Ukulawulwa kokushisa okuhlakaniphile kuthuthukisa ukusebenza kahle, kunciphisa umsindo, futhi kwandise impilo yezingxenye—ngoba izingxenye zikagesi zamandla zizwela kakhulu ekujikelezeni kokushisa.
Izici Zokwakheka Kokwethembeka Nokuphepha
Amashaja anamandla amakhulu asetshenziswa kabanzi ezindaweni zomphakathi nezimboni, ngakho-ke ukwakheka kokupholisa kumele kucabangele:
– Ukungasebenzi kahle: amafeni ahambisanayo, amaphampu okusekelayo, noma ikhono lokusebenza elilinganiselwe lapho ingxenye yesistimu yokupholisa yehluleka.
– Ukuvikelwa kokushisa okunezingqimba eziningi: izinzwa ezimbili, ukunqunywa kokushisa, kanye nokukhiya okuhlanganisiwe ukuvimbela ukushisa ngokweqile.
– Izindinganiso zemvelo: Isilinganiso se-IP, ukumelana nomswakama, uthuli kanye namazinga okushisa aphezulu.
– Izinto zokushisa kanye nezindawo zokuhlangana: i-thermal pad/grease efanele yehlisa ukumelana kokushisa phakathi kwengxenye kanye ne-heatsink/cold plate.
– Ukudlidliza kanye nokushaqeka: izingxenye zemishini ezifana namafeni/amaphampu kumele zimelane nezimo zasensimini.
Ukuthembeka kuvame ukunqunywa hhayi yingxenye eyodwa "enkulu", kodwa ngemininingwane emincane: ikhwalithi yokufakwa kwesikhombikubona sokushisa, indlela efanele yokugeleza komoya, noma ukukhethwa kwefeni ehambisana nejika lokucindezela elingaguquki.
Amathrendi Esikhathi Esizayo
Izitayela eziningana zibumba ukuvela kokupholisa okusebenzayo kumashaja anamandla aphezulu. Okokuqala, ukusetshenziswa kwama-semiconductor e-wide-bandgap njenge-SiC ne-GaN kuthuthukisa ukusebenza kahle futhi kunciphisa ukulahlekelwa kokushintsha, kodwa kusadinga ukupholisa njengoba ubuningi bamandla bukhuphuka. Okwesibili, imiklamo ye-modular ivumela ukusatshalaliswa kokushisa okusakazekile, kodwa kudinga ukuphathwa kokugeleza okuqhubekayo phakathi kwamamojula. Okwesithathu, ukuhlanganiswa kwezinhlelo zokupholisa namakhabethe okushaja kanye nezixhumi ezipholile (isb., izintambo zokushaja ezipholile ngoketshezi) kuya ngokuya kuvama ekushajeni okusheshayo kakhulu.
Ngaphezu kwalokho, ukuqapha okusekelwe ku-IoT kwenza kube lula ukulungisa okubikezelayo: uhlelo lungabikezela ukuthi ifeni iba buthaka nini, isihlungi sivalekile, noma iphampu iba engazinzile ngaphambi kokuba ibangele ukwehluleka.
I-Penutup
Izinhlelo zokupholisa ezisebenzayo ziyisihluthulelo sokusebenza nokuthembeka kwamashaja anamandla aphezulu. Njengoba isidingo sokushaja okusheshayo sikhula kanye nemiklamo emincane eyandayo, ukuphathwa kokushisa kuyinselele ebalulekile engenakushaywa indiva. Ukupholisa umoya okusebenzayo kunikeza ikhambi elilula nelingabizi, kuyilapho ukupholisa koketshezi kunikeza amakhono aphezulu kakhulu okusabalalisa ukushisa kwezinhlelo zokusebenza ezibucayi. Kungakhathaliseki ukuthi iyiphi indlela, impumelelo inqunywa ukwakheka kokushisa okuphelele kanye nokulawula okuhlakaniphile. Ngalezo zindlela, amashaja angasebenza kahle kakhulu, ngokuphephile, futhi abe nesikhathi eside sokuphila—ukusekela uhlelo lwesimanje lwamandla oluthembela kakhulu ekushajeni okusheshayo.
Uma ufisa, ngingaguqula lesi sihloko sibe yinguqulo yobuchwepheshe kakhulu (enezibalo ezilula ezifana nokulinganisa ukulahlekelwa, umthwalo wokushisa, kanye nokukhetha ifeni/iphampu) noma inguqulo ethandwa kakhulu ngabafundi abavamile.
