Analysis of inductor current| U FOLE

Moralo oa inductor o tlisa mathata a mangata ho lienjineri moralong oa phepelo ea motlakase. Baenjiniere ha baa lokela ho khetha feela boleng ba inductance, empa hape ba nahane ka hona joale eo inductor e ka e jarang, ho hanyetsa mapheo, boholo ba mochine joalo-joalo. Tšusumetso ea hona joale ea DC ho inductor, e tla boela e fane ka tlhahisoleseding e hlokahalang bakeng sa ho khetha inductor e nepahetseng.

Utloisisa mosebetsi oa inductor

Hangata inductor e utloisisoa e le L ho potoloho ea filthara ea LC tlhahisong ea phepelo ea motlakase (C ke capacitor e hlahisoang). Le hoja kutloisiso ena e nepahetse, hoa hlokahala ho ba le kutloisiso e tebileng ea boitšoaro ba li-inductors e le hore u utloisise moralo oa li-inductors.

Phetolelong ea ho theoha, pheletso e 'ngoe ea inductor e hokahane le motlakase o tsoang ho DC. Qetello e 'ngoe e hokahane le motlakase oa motlakase kapa GND ka ho switjha frequency switching.

Inductor e hokahane le motlakase o kenang ka MOSFET, 'me inductor e hokahane le GND. Ka lebaka la ts'ebeliso ea mofuta ona oa taolo, inductor e ka theoa ka mekhoa e 'meli: ka ho theoa ha diode kapa ka MOSFET. Haeba e le tsela ea ho qetela, converter e bitsoa "synchronus" mode.

Joale nahana hape haeba hona joale ho phallang ka inductor linaheng tsena tse peli ho fetoha. Qetello e 'ngoe ea inductor e hokahane le matla a ho kenya letsoho 'me e 'ngoe e hokahane le motlakase o tsoang. Bakeng sa converter ea ho theoha, motlakase oa ho kenya o tlameha ho ba o phahameng ho feta motlakase o tsoang, kahoo ho theoha ha motlakase ho tla thehoa ho inductor. Ho fapana le hoo, nakong ea boemo ba 2, ntlha e le 'ngoe ea inductor eo qalong e neng e hokahane le motlakase oa ho kenya e hokahane le fatše. Bakeng sa converter ea ho theoha, motlakase o hlahisoang o tlameha ho ba o motle, kahoo ho theoha ha motlakase ho tla thehoa ho inductor.

Ka hona, ha motlakase ho inductor e le ntle, hona joale ho inductor e tla eketseha; ha motlakase ho inductor e le mpe, hona joale ho inductor e tla fokotseha.

Ho theoha ha on-voltage ea inductor kapa ho theoha ha motlakase oa pele oa Schottky diode ho potoloho ea asynchronous ho ka hlokomolohuoa ha ho bapisoa le motlakase oa ho kenya le ho tsoa.

Phallo ea mantlha ea inductor

Ka tlhōrō ea tlhōrō ea inductor e baloang, re ka fumana se hlahisoang ho inductor. Ho bonolo ho tseba hore ha hona joale ka inductor e ntse e eketseha, inductance ea eona e fokotseha. Sena se khethoa ke thepa ea 'mele ea magnetic core material. Ho bohlokoa hakae hore inductance e fokotsehe: haeba inductance e fokotsehile haholo, converter e ke ke ea sebetsa hantle. Ha motlakase o fetang ka har'a inductor o le moholo hoo motlakase o sebetsang hantle, hona joale o bitsoa "saturation current". Hona hape ke paramente ea mantlha ea inductor.

Ha e le hantle, inductor ea matla a ho fetola potolohong ea phetoho e lula e na le "bonolo" saturation. Ha hona joale ho eketseha ho isa bohōleng bo itseng, inductance e ke ke ea fokotseha haholo, e bitsoang "bonolo" tšobotsi ea saturation. Haeba hona joale e eketseha hape, inductor e tla senyeha. Ho fokotseha ha inductance ho teng mefuteng e mengata ea li-inductors.

Ka tšobotsi ena e bonolo ea saturation, re ka tseba hore na ke hobane'ng ha bonyane inductance tlas'a DC output current e hlalositsoe ho li-converter tsohle, 'me phetoho ea ripple current e ke ke ea ama inductance ka ho teba. Lits'ebetsong tsohle, lebelo la ripple le lebelletsoe ho ba le lenyane ka moo ho ka khonehang, hobane le tla ama leqhubu la phallo ea motlakase. Ke ka lebaka lena batho ba lulang ba tšoenyehile ka inductance tlas'a tlhahiso ea hona joale ea DC mme ba iphapanyetsa inductance tlas'a maqhubu a ripple ho Spec.

Ka holimo ke kenyelletso ea tlhahlobo ea hajoale ea inductor, haeba u batla ho tseba haholoanyane ka li-inductors, ka kopo ikutloe u lokolohile ho ikopanya le rona.