Ihame ryo gushyushya guteka
Induction guteka ikoreshwa mu gushyushya ibiryo hashingiwe ku ihame ryo kwinjiza amashanyarazi. Itanura hejuru yitanura ni plaque ceramic irwanya ubushyuhe. Umuyoboro uhinduranya utanga umurima wa magneti unyuze muri coil munsi yisahani. Iyo umurongo wa magneti mumurima wa magneti unyuze munsi yinkono yicyuma, inkono yicyuma idafite ingese, nibindi, hazakorwa imigezi ya eddy, izahita ishyushya hasi yinkono, kugirango igere kumugambi wo gushyushya ibiryo.
Igikorwa cyacyo niki gikurikira: voltage ya AC ihindurwamo DC ikoresheje ikosora, hanyuma imbaraga za DC zihindurwamo ingufu za AC zifite ingufu nyinshi zirenga amajwi binyuze mumashanyarazi menshi. Imbaraga zumurongo wa AC zongewe kumurongo ushyushye wa spiral induction yo gushyushya kugirango ubyare ingufu za magneti nyinshi zisimburana. Umurongo wa rukuruzi wimbaraga winjira mububiko bwa ceramic yamashyiga kandi ukora kumasafuriya. Imiyoboro ikomeye ya eddy ikorwa mumasafuriya yo guteka kubera kwinjiza amashanyarazi. Umuyoboro wa eddy unesha imbaraga zimbere yinkono kugirango urangize guhindura ingufu zamashanyarazi kugirango ushushe ingufu iyo zitemba, kandi ubushyuhe bwa Joule butanga ni isoko yubushyuhe bwo guteka.
Isesengura ryumuzenguruko Ihame ryakazi Guteka
1. Inzira nyamukuru
Mu gishushanyo, ikiraro gikosora BI gihindura ingufu za voltage (50HZ) mumashanyarazi ya DC. L1 ni kuniga na L2 ni coil ya electronique. IGBT itwarwa na pulse y'urukiramende ruva mukuzunguruka. Iyo IGBT ifunguye, ikigezweho kinyura muri L2 cyiyongera vuba. Iyo IGBT ihagaritswe, L2 na C21 bizagira rezonans ikurikirana, na C-pole ya IGBT izabyara impanuka nini cyane. Iyo impyisi igabanutse kuri zeru, pulse yimodoka yongerewe kuri IGBT kugirango ikore neza. Inzira yavuzwe haruguru irazenguruka, kandi amaherezo nyamukuru ya electromagnetic yumurongo wa 25KHZ arangije gukorwa, bigatuma inkono yicyuma ishyirwa kumasahani ya ceramic itera eddy kandi bigatuma inkono ishyuha. Inshuro zuruhererekane rwa resonance ifata ibipimo bya L2 na C21. C5 nubushobozi bwo kuyungurura imbaraga. CNR1 ni varistor (surge absorber). Iyo amashanyarazi ya AC yamashanyarazi azamutse gitunguranye kubwimpamvu runaka, izahita izunguruka ako kanya, izahita ihuha fuse kugirango irinde uruziga.
2. Amashanyarazi afasha
Amashanyarazi ahinduranya atanga amashanyarazi abiri atezimbere: + 5V na + 18V. + 18V nyuma yo gukosora ikiraro ikoreshwa kumuzunguruko wa disiki ya IGBT, IC LM339 hamwe n’umuzunguruko w’abafana bigereranywa hamwe, naho + 5V nyuma yo guhagarika imbaraga za voltage eshatu zumuzunguruko zikoreshwa mukugenzura nyamukuru MCU.
3. Umufana ukonje
Iyo amashanyarazi afunguye, igenzura nyamukuru IC yohereza ikimenyetso cyo gutwara abafana (FAN) kugirango umuyaga uhindurwe, uhumeke umwuka ukonje wo hanze mumubiri wimashini, hanyuma usohokane umwuka ushushe kuruhande rwinyuma rwimashini. kugirango ugere ku ntego yo gukwirakwiza ubushyuhe muri mashini, kugirango wirinde kwangirika no kunanirwa kw ibice bitewe nubushyuhe bwo hejuru bukora. Iyo umufana ahagaritse cyangwa ubushyuhe bukabije ntibukennye, metero ya IGBT yometse hamwe na thermistor kugirango yohereze ibimenyetso byubushyuhe bukabije kuri CPU, ihagarike gushyushya, kandi bigere kuburinzi. Mugihe cyamashanyarazi, CPU izohereza ikimenyetso cyo kumenya abafana, hanyuma CPU ikohereza ikimenyetso cyo gutwara abafana kugirango imashini ikore mugihe imashini ikora bisanzwe.
4. Kugenzura ubushyuhe burigihe no kurinda ubushyuhe bukabije
Igikorwa nyamukuru cyuyu muzunguruko ni uguhindura ubushyuhe bwo guhindura voltage yumuriro ukurikije ubushyuhe bwumviswe na thermistor (RT1) munsi ya plaque ceramic hamwe na thermistor (coefficient de coeffisente) kuri IGBT, hanyuma ukayigeza kuri nyamukuru kugenzura IC (CPU). CPU ikora ikimenyetso cyo gukora cyangwa guhagarika mugereranya ubushyuhe bwashyizweho nyuma ya A / D.
5. Ibikorwa byingenzi byubugenzuzi bukuru IC (CPU)
Ibikorwa byingenzi bya 18 pin master IC nibi bikurikira:
(1) Imbaraga ON / OFF igenzura
(2) Ubushyuhe bwo gushyushya / kugenzura ubushyuhe burigihe
(3) Kugenzura imikorere itandukanye yikora
(4) Nta gutahura imitwaro no guhagarika byikora
(5) Ibikorwa by'ingenzi byinjira
(6) Ubushyuhe bwo hejuru bwiyongera kurinda imashini
(7) Kugenzura inkono
(8) Kumenyesha hejuru yubushyuhe
(9) Gukonjesha abafana
(10) Igenzura ryibice bitandukanye byerekana
6. Fungura inzitizi zerekana
Muri uyu muzunguruko, T2 (transformateur) ihujwe mukurikirane kumurongo imbere ya DB (ikosora ikiraro), bityo voltage ya AC kuruhande rwa T2 kuruhande irashobora kwerekana ihinduka ryinjiza ryinjira. Iyi voltage ya AC noneho ihindurwamo ingufu za DC binyuze muri D13, D14, D15 na D5 yuzuye ikosora, kandi voltage yoherejwe muri CPU kugirango ihindurwe AD nyuma yo kugabana voltage. CPU isuzuma ingano iriho ukurikije agaciro ka AD yahinduwe, ikabara imbaraga ikoresheje software kandi ikagenzura ingano ya PWM yo kugenzura ingufu no kumenya umutwaro
7. Gutwara umuzunguruko
Umuzunguruko wongerera ibimenyetso bya pulse biva mubugari bwa pulse ubugari bwumuzunguruko kugeza imbaraga zerekana ibimenyetso bihagije kugirango IGBT ifungure kandi ifunge. Mugari mugari winjiza pulse ubugari, igihe kinini cyo gufungura IGBT. Ninshi imbaraga zisohoka za coil guteka, niko umuriro mwinshi.
8
Umuzunguruko wizunguruka (generator yumuriro) ugizwe na syncronique detection loop igizwe na R27, R18, R4, R11, R9, R12, R13, C10, C7, C11 na LM339, inshuro zinyeganyega zihuzwa numurongo wakazi wa guteka munsi Modulisiyo ya PWM, isohora impiswi ikoresheje pin 14 ya 339 kugirango igendere kubikorwa bihamye.
9. Inzira yo gukingira
Inzira yo gukingira ibice igizwe na R1, R6, R14, R10, C29, C25 na C17. Iyo kwiyongera ari hejuru cyane, pin 339 2 isohora urwego rwo hasi, kuruhande rumwe, iramenyesha MUC guhagarika ingufu, kurundi ruhande, izimya ikimenyetso cya K binyuze muri D10 kugirango kizimye amashanyarazi.
10. Dynamic voltage detection circuit
Umuzunguruko wa voltage ugizwe na D1, D2, R2, R7, na DB ukoreshwa kugirango umenye niba ingufu z'amashanyarazi ziri mu ntera ya 150V ~ 270V nyuma yuko CPU ihinduye mu buryo butaziguye imivurungano ikosowe AD.
11. Kugenzura ako kanya umuvuduko mwinshi wa voltage
R12, R13, R19 na LM339 bigizwe. Iyo voltage yinyuma isanzwe, uyu muzunguruko ntuzakora. Iyo ako kanya umuvuduko mwinshi urenze 1100V, pin 339 1 izasohoka ubushobozi buke, ikure PWM, igabanye ingufu zisohoka, igenzure voltage yinyuma, irinde IGBT, kandi irinde gusenyuka kwinshi.
Igihe cyo kohereza: Ukwakira-20-2022
