Mokhoa oa ho fokotsa tahlehelo ea mantlha ea inductor | U FOLE

Rea tseba hore inductance core ke sehlahisoa se tla sebelisoa lihlahisoa tse ngata tsa elektroniki, lihlahisoa tsa elektroniki li tla hlahisa tahlehelo e itseng nakong ea ts'ebeliso, 'me motheo oa matla le ona o joalo. Haeba tahlehelo ea mantlha ea inductor e le kholo haholo, e tla ama bophelo ba ts'ebeletso ea mantlha ea inductor.

Tšobotsi ea tahlehelo ea mantlha ea inductor (haholo-holo e kenyelletsa tahlehelo ea hysteresis le tahlehelo ea hona joale ea eddy) ke e 'ngoe ea matšoao a bohlokoa ka ho fetisisa a lisebelisoa tsa matla, tse amang esita le ho etsa qeto ea ho sebetsa hantle, ho phahama ha mocheso le ho tšepahala ha mochine oohle.

Tahlehelo ea mantlha ea inductor

1. Hysteresis tahlehelo

Ha thepa ea mantlha e entsoe ka makenete, ho na le likarolo tse peli tsa matla a romelloang ho matla a khoheli, e 'ngoe ea tsona e fetoloang ho ba matla a ka bang teng, ke hore, ha motlakase oa kantle o tlosoa, matla a matla a khoheli a ka khutlisetsoa potolohong. , ha karolo e 'ngoe e jeoa ke ho hlōla khohlano, e bitsoang tahlehelo ea hysteresis.

Sebaka sa karolo ea moriti oa curve ea magnetization e emela tahlehelo ea matla e bakoang ke hysteresis ts'ebetsong ea magnetization ea motsoako oa makenete nakong ea potoloho ea ho sebetsa. Mekhahlelo e amang sebaka sa tahlehelo ke boholo ba matla a matla a khoheli a sebetsang a B, matla a matla a khoheli a matla a matla a khoheli H, remanence Br le matla a coercive Hc, moo matla a khoheli le matla a matla a matla a khoheli a itšetlehileng ka maemo a kantle a motlakase le core size parameters, ha Br le Hc li itšetlehile ka thepa ea thepa. Bakeng sa nako e 'ngoe le e' ngoe ea magnetization ea mantlha ea inductor, ho hlokahala ho lahleheloa ke matla a lekanang le sebaka se pota-potiloeng ke loop ea hysteresis. ha maqhubu a phahame, matla a tahlehelo a maholoanyane, matla a matla a khoheli a matla a khoheli a maholo, sebaka se kampetsoeng se seholo, tahlehelo ea hysteresis e kholoanyane.

2. Eddy tahlehelo ea hona joale

Ha motlakase oa AC o eketsoa ho coil ea mantlha ea makenete, hona joale ho phalla ho phalla ka har'a coil, 'me matla ohle a makenete a hlahisoang ke phetoho e thabisang ea ampere a feta har'a motsoako oa makenete. The magnetic core ka boeona ke conductor, 'me matla ohle a makenete a pota-potileng karolo ea sefapano sa motsoako oa makenete a hokahane ho theha khoele ea bobeli ea mothinya o le mong. Hobane ho hanyetsa ha matla a khoheli ha ho na moeli, ho na le khanyetso e itseng ho pota-potile motheo, 'me motlakase o susumelitsoeng o hlahisa hona joale, ke hore, eddy current, e phallang ka ho hanyetsa hona, ho baka tahlehelo, ke hore, tahlehelo ea hona joale ea eddy.

3. Tahlehelo e setseng

Tahlehelo e setseng e bakoa ke magnetization relaxation effect kapa magnetic hysteresis effect. Seo ho thoeng ke ho phomola ho bolela hore ts'ebetsong ea magnetization kapa anti-magnetization, boemo ba magnetization ha bo fetohe hang-hang boemong ba bona ba ho qetela ka phetoho ea matla a magnetization, empa e hloka ts'ebetso, 'me sena "phello ea nako" ke sesosa sa tahlehelo e setseng. Haholo-holo e maemong a phahameng a 1MHz ka holim'a tahlehelo e itseng ea ho phomola le ho phalla ha matla a khoheli joalo-joalo, phepelong ea motlakase ea makholo a KHz ea lisebelisoa tsa elektroniki, karolo ea tahlehelo e setseng e tlase haholo, e ka hlokomolohuoa.

Ha u khetha motsoako o loketseng oa makenete, li-curve tse fapaneng le litšoaneleho tsa khafetsa li lokela ho nahanoa, hobane lekhalo le etsa qeto ea tahlehelo e phahameng ea maqhubu, sekhahla sa saturation le inductance ea inductor. Hobane motlakase oa eddy ka lehlakoreng le leng o baka tahlehelo ea ho hanyetsa, o etsa hore matla a khoheli a futhumale, 'me a etsa hore motlakase o eketsehe, ka lehlakoreng le leng o fokotsa sebaka se sebetsang sa magnetic conduction ea magnetic core. Ka hona, leka ho khetha lisebelisoa tsa makenete tse nang le resistivity e phahameng kapa ka mokhoa oa ho roala lesela ho fokotsa tahlehelo ea hona joale ea eddy. Ka hona, thepa e ncha ea platinum NPH-L e loketse li-cores tsa phofshoana ea tšepe ea tahlehelo e tlaase ea maqhubu a phahameng le lisebelisoa tse phahameng tsa matla.

Tahlehelo ea mantlha e bakoa ke matla a khoheli a fapanyetsanang linthong tsa mantlha. Tahlehelo e bakoang ke thepa e itseng ke ts'ebetso ea maqhubu a ts'ebetso le kakaretso ea flux swing, kahoo e fokotsa tahlehelo e sebetsang ea conduction. Tahlehelo ea mantlha e bakoa ke hysteresis, eddy current le tahlehelo e setseng ea thepa ea mantlha. Ka hona, tahlehelo ea mantlha ke kakaretso ea tahlehelo ea hysteresis, tahlehelo ea hona joale ea eddy le tahlehelo ea remanence. Hysteresis tahlehelo ke tahlehelo ea matla e bakoang ke hysteresis, e lekanang le sebaka se pota-potiloeng ke hysteresis loops. Ha matla a khoheli a fetang bohareng a fetoha, motlakase oa eddy o hlaha bohareng, 'me tahlehelo e bakoang ke eddy current e bitsoa eddy current loss. Tahlehelo e setseng ke tahlehelo eohle ntle le tahlehelo ea hysteresis le tahlehelo ea hona joale ea eddy.