Diajar jumlah induktansi induktansi modus umum . Turutan pabrik induktansi (dibekelan sacara profesional: induktor axial, Peta Situs radial induktor) pikeun diajar:
Modeu bédana ayeuna: Sapasang sinyal tina ukuran anu sami sareng arah anu sabalikna dina sapasang garis sinyal diferensial, biasana dianggo dina sirkuit
Arus, pikeun garis sinyal, nyaéta arus anu ngalir di antara garis sinyal sareng ground signal.
Mode ayeuna: Sapasang sinyal (atanapi noises) tina ukuran anu sami sareng arah dina sapasang garis sinyal diferensial. Dina sirkuit,
Sacara umum, noise ground dikirimkeun ku modeu umum ayeuna, janten éta ogé disebat noise mode umum.
Aya seueur cara pikeun nekenkeun noise-mode umum. Salaku tambahan pikeun ngirangan noise mode-umum dina sumber, induktansi modus umum biasana dianggo pikeun nyaring noise mode-umum, nyaéta pikeun meungpeuk noise mode-umum kaluar tina sirkuit target. Maksudna, mode choke umum dina séri dina Tujuanana nyaéta pikeun ningkatkeun impedansi tina sirkuit modeu umum supados arus modeu umum dikonsumsi sareng diblokir (dibayangkeun) ku choke, sahingga neken noise-mode umum dina sirkuit.
Prinsip choke atanapi induktor modeu umum
Upami sapasang coil anu tatu dina arah anu sami dina ring magnét sababaraha bahan magnét, fluks magnét dihasilkeun dina coil kusabab induksi éléktromagnétik nalika arus bolak-balik nembus coil. Pikeun sinyal modeu diferensial, fluks magnét anu dihasilkeun ku ring magnet sami sareng ukuran sareng sabalikna ti arah, sareng duanana ngabolaykeun silih, janten impedansi modus diferensial anu dihasilkeun ku cincin magnét alit pisan. Pikeun sinyal modus umum, fluks magnét anu dihasilkeun sami ageungna sareng arah, sareng dua saling ditumpukkeun silih ngahasilkeun impedansi modus umum tina cincin magnet. Karakteristik ieu nyababkeun induktansi modus umum gaduh pangaruh kirang kana sinyal modeu diferensial sareng kinerja nyaring langkung saé pikeun mode bisu umum.
(1) Nalika modeu diferensial ayeuna nembus coil modeu umum, garis médan magnét aya dina arah anu berlawanan sareng médan magnét anu diinduksi lemah. Éta tiasa ditingali tina arah garis médan magnét dina gambar di handap ieu yén panah garis padet ngagambarkeun arah arus sareng garis putus-putus ngagambarkeun arah médan magnét
(2) arus modus umum nembus coil modus umum, sareng médan magnét dikuatkeun kusabab arah anu sami tina garis médan magnét. Éta tiasa ditingali tina arah garis médan magnét dina gambar di handap ieu yén panah garis padet ngagambarkeun arah arus sareng garis putus-putus ngagambarkeun arah médan magnét
Induktansi modél umum tina coil atanapi disebut koefisien induksi diri, urang terang yén induktansi ngahasilkeun kamampuan médan magnét, modeu umum atanapi coil induktor modus umum, nalika arus modus umum ngalir ngalangkungan coil, kusabab garis médan magnét dina arah anu sarua, tanpa kudu dipertimbangkeun dina kaayaan induktansi kabocoran, fluks magnét, prinsipna nyaéta silih induktansi, handapeun garis-garis médan magnét coil ngalangkungan garis médan magnét bulao, beureum sareng biru ogé ngaliwatan coil beureum, silih induksi.
From the point of view of inductance, inductance is multiplied, magnetic chain represents the total magnetic flux, the common-mode inductor, when magnetic flux is doubled, circle number has not changed, the current didn't also did not change, so mean increased inductance for 2 times, means that the equivalent permeability into 2 times.
Kumaha perméabilitas anu sami tiasa dua kali? Tina rumus induktansi ieu, kumargi jumlah puteran N henteu robih, sirkuit magnét sareng luas penampang inti magnét ditangtukeun ku ukuran fisik inti magnét, janten teu aya parobihan. Hiji-hijina alesanna nyaéta perméabilitas U dua kali, janten langkung fluks magnét tiasa dihasilkeun
Common-mode inductor in common mode, therefore, when an electric current passes through, work under the mutual inductance model, under the effect of mutual inductance, the equivalent inductance is cost increase, therefore common mode impedance will be multiplied, and the common mode signal has good filtering effect, also is the common mode signal with large impedance block, don't let it pass the common-mode inductor, also is not to let this signal transmission to the next level of the circuit, the following is the inductive reactance ZL.
Know common-mode inductor under the mode of common mode inductance, is the main clue to know mutual inductance, magnetic components of all, no matter what name as long as mastering the form of the change of the magnetic field, magnetic field changes through the phenomenon to essence, also easy to understand, moreover we always grasp the magnetic field lines, it is our understanding the visual form of the magnetic field, consider whether the same side or different name or concept of the mutual inductance phenomenon or magnetic field, we are drawing the lines of magnetic force to realize their - master "magnet winding method" is explained before.
Pos waktos: Dec-16-2020