1. Mhedziso yeKuchinja Kwemagetsi
Kuchinja magetsichinhu chepamusoro-frequency magetsi ekushandura simba, inozivikanwawo sekuchinja magetsi kana kushandura kushandura. Inoshandura magetsi ekupinza kuita yakakwira-frequency pulse chiratidzo kuburikidza ne-high-speed switching chubhu, uyezve inoshandura simba remagetsi kubva kune imwe fomu kuenda kune imwe kuburikidza nekugadzirisatransformer, rectifier redunhu uye kusefa dunhu, uye pakupedzisira inowana yakagadzikana yakaderera ripple DC voltage yemagetsi.
Kuchinja kwemagetsi kune zvakanakira kushanda kwepamusoro, kugadzikana kwakanaka, diki diki, huremu huremu, kuvimbika kwepamusoro, uye inogona kuchinjirwa kune akasiyana emagetsi zvinodiwa.
Kuchinja kwemagetsi kwave kushandiswa zvakanyanya munzvimbo dzakasiyana siyana, kusanganisira maindasitiri otomatiki, kutaurirana uye simba idzva. Mumunda weindasitiri otomatiki, kushandura magetsi kunopa kugadzikana kwesimba retsigiro kune akasiyana otomatiki michina kuti ive nechokwadi chekushanda uye kugadzikana kushanda kwemidziyo.
Mumunda wekutaurirana, switching power supply inoshandiswa zvakanyanya muwireless base station, network network, nezvimwewo, kuve nechokwadi chekutapurirana kwechiratidzo kugadzikana kweiyo nzira yekutaurirana nekuvandudza kunaka kwekutaurirana. Mumunda wesimba idzva, kushandura magetsi kunotora basa rinokosha mumagetsi ezuva nemhepo, zvichibatsira kushandiswa kunobudirira kwesimba rinoshandiswazve.
Kuchinja kwemagetsi kunenge kuumbwa nezvikamu zvina zvikuru: dunhu rekuisa, shandurudzo, control circuit, uye kubuda dunhu. Inotevera ndiyo yakajairwa kushandura magetsi ekupa schematic block dhizaini, kugona kwakakosha kuti isu tinzwisise switch yemagetsi magetsi.
2. Kurongwa kwekushandura magetsi emagetsi
Kuchinja kwemagetsi emagetsi kunogona kuverengerwa zvinoenderana neakasiyana emhando zviyero. Izvi zvinotevera nzira dzinoverengeka dzakajairika dzekuisa:
1. Kusarudzika nerudzi rwemagetsi ekuisa:
AC-DC inoshandura magetsi: inoshandura AC simba kuita DC simba.
DC-DC inoshandura magetsi: inoshandura magetsi eDC kuita imwe DC voltage.
2. Classification nekushanda mode:
Single-inopera switching power supply: ine chete switch chubhu, yakakodzera kune yakaderera-simba maapplication.
Dual-inopera switching power supply: ine machubhu maviri ekuchinja, akakodzera kushandiswa kwesimba repamusoro.
3. Kurongwa netopology:
Zvinoenderana neiyo topology, inogona kuganhurwa zvakakamurwa kuita Buck, Boost, Buck-Boost, Flyback, Forward, Two-Transistor Forward, Push-Pull, Half Bridge, Full Bridge, etc. Aya maitiro ekuisa chikamu chikamu chavo. Kushandura magetsi emagetsi kunogonawo kuiswa mune zvakadzama zvichienderana nezvimwe zvinodiwa uye mashandisirwo.
Tevere, isu tichasuma iyo inowanzo shandiswa Flyback uye Forward. Forward and flyback ndiwo maviri akasiyana ekuchinja magetsi ekupa matekinoroji. Forward switching power supply inoreva shanduko yemagetsi inoshandisa kumberi kwepamusoro-frequency transformer kupatsanura simba rakabatanidzwa, uye inofambirana neflyback switching power supply ndeye flyback switching power supply.
2.1 Pamberi kushandura magetsi
Forward switching power supply in the structure yakanyanya kuoma, asi simba rekubuda rakawanda, rakakodzera 100W-300W switching power supply, rinowanzo shandiswa mu low-voltage, high-current switching power supply, rinoshandiswa zvakanyanya.
Sezvinoratidzwa mumufananidzo uri pazasi, yekumberi yekuchinjisa simba rekupa kana iyo switching chubhu yabatidzwa, inobuda transformer inoita senge svikiro yakabatana neiyo magineti simba, simba remagetsi uye magineti simba rinoshandurwa kune rimwe nerimwe, kuitira kuti kupinza uye kubuda panguva imwe chete.
Panewo zvikanganiso mukushandiswa kwezuva nezuva: sekuda kwekuwedzera reverse inogona kutenderera (kudzivirira iyo transformer yepuraimari coil inogadzirwa neiyo reverse inogona kune switching chubhu kuparara), yechipiri inopfuura imwe inductor yekusefa kwesimba rekuchengetedza, saka. kana ichienzaniswa neiyo flyback switching magetsi, mutengo wayo wakakwira, uye kumberi kuchinjika kwemagetsi emagetsi emagetsi vhoriyamu kupfuura vhoriyamu yeflyback switching power supply transformer yakakura.
Forward switching power supply
2.2 Flyback inoshandura magetsi
Sezvinoratidzwa mumufananidzo uri pazasi, iyo flyback switching power supply inoreva switch yemagetsi inoshandisa flyback high-frequency transformer kusiyanisa ekuisa nekubuda maseketi. Iyo transformer haingoite basa rekushandura voltage kuendesa simba, asi zvakare inotamba basa rekuchengetedza simba inductor. Nokudaro, iyo flyback transformer yakafanana nekugadzirwa kweinductor. Maseketi ese ari nyore uye ari nyore kudzora. Flyback inoshandiswa zvakanyanya mune yakaderera-simba maapplication e5W-100W.
Kune flyback switching power supply, kana chubhu ichivhurwa, ikozvino yeinductor yekutanga ye transformer inosimuka. Sezvo iyo inobuda coil yeflyback wedunhu ine migumo yakatarisana, iyo diode inobuda inodzimwa, transformer inochengeta simba, uye mutoro unopihwa nesimba neinobuda capacitor. Kana iyo switch chubhu yakadzimwa, iyo inductive voltage yeiyo yekutanga inductor yetransformer inodzoserwa kumashure. Panguva ino, diode yakabuda inoshandurwa, uye simba rekushandura rinopiwa kumutoro kuburikidza ne diode, ichichaja capacitor.
Flyback switching power supply
Kubva pakuenzanisa, zvinogona kuonekwa kuti mushanduri wekusimudzira mberi ane chete basa rekushandura, uye iyo yose inogona kuonekwa seye buck circuit ine transformer. Flyback transformer inogona kutorwa senge inductor ine transformer basa, ndeye buck-boost circuit. Kazhinji, iyo yekumberi flyback inoshanda musimboti yakasiyana, kumberi ibasa rekutanga basa rechipiri, yechipiri haishande neino inductor yekuvandudza ikozvino, kazhinji CCM maitiro.
Power factor kazhinji haina kukwira, uye iyo yekupinza uye inobuda uye inosiyana yebasa kutenderera inoenzanirana. Flyback ndiro basa rekutanga, yechipiri haishande, mativi maviri akazvimirira, kazhinji DCM modhi, asi inductance yetransformer ichava diki, uye kudiwa kwekuwedzera mhepo gap, saka kazhinji yakakodzera kune diki nepakati simba.
Forward transformer yakanakira, hapana simba rekuchengetedza, asi nekuti iyo excitation inductance yakakosha inopera, iyo excitation ikozvino inoita kuti musimboti uve wakakura, kuitira kudzivirira flux saturation, iyo transformer inoda yekubatsira mhepo yekuyerera reset.
Flyback transformer inogona kuonekwa sechimiro chekubatanidza inductance, inductance yekutanga kuchengetedza simba uye yozobudiswa, nekuda kweiyo flyback transformer yekupinda uye kubuda kwemagetsi kwakatarisana ne polarity, saka kana iyo switching chubhu ikabviswa, yechipiri inogona kupa iyomagnetic coreine reset voltage, uye nekudaro iyo flyback transformer haidi kuwedzera imwe flux reset mhepo.
Nguva yekutumira: Sep-29-2024