Basa guru re optocoupler mu power supply circuit nderekuita kuti pave ne divi rimwe chete panguva yekushandura photoelectric uye kudzivirira kupindirana. Basa re disconnector rinonyanya kukosha mu circuit.
Chiratidzo chinofamba nenzira imwe chete. Kupinza nekuburitsa zvinobviswa zvachose nemagetsi. Chiratidzo chekuburitsa hachina simba pane zvinopinda. Kugona kwakasimba kwekudzivirira kukanganiswa, kushanda kwakasimba, kusabatana, hupenyu hurefu hwebasa uye kushanda zvakanaka kwekutumira. Optocoupler chishandiso chitsva chakagadzirwa muma1970. Parizvino, chinoshandiswa zvakanyanya mu electrical insulation, level conversion, interstage coupling, driving circuit, switching circuit, chopper, multivibrator, signal isolation, interstage isolation, pulse amplification circuit, digital instrument, long-distance signal transmission, pulse amplifier, solid-state device, state relay (SSR), instrument, communication equipment uye microcomputer interface. Mu monolithic switching power supply, linear optocoupler inoshandiswa kugadzira optocoupler feedback circuit, uye duty cycle inoshandurwa nekugadzirisa control terminal current kuti iwane chinangwa che voltage regulation chaiyo.
Basa guru re optocoupler mukuchinja magetsi nderekuparadzanisa, kupa chiratidzo chekupindura uye switch. Simba re optocoupler mu switching power supply circuit rinopihwa ne secondary voltage ye high-frequency transformer. Kana output voltage iri pasi pane zener voltage, vhura signal optocoupler wowedzera duty cycle kuti uwedzere output voltage. Kusiyana neizvi, kudzima optocoupler kunoderedza duty cycle uye kuderedza output voltage. Kana secondary load ye high-frequency transformer yakawandisa kana switch circuit ikatadza kushanda, hapana optocoupler power supply, uye optocoupler inodzora switch circuit kuti isadengenyeke, kuitira kudzivirira switch tube kuti isatsve. Optocoupler inowanzo shandiswa neTL431. Ma resistors maviri anotorwa mu series ku 431r terminal kuti aenzaniswe ne internal comparator. Zvadaro, zvichienderana nechiratidzo chekuenzanisa, kuramba kwepasi kwe431k end (kumagumo uko anode yakabatana ne optocoupler) kunodzorwa, uye ipapo kupenya kwe light-emitting diode mu optocoupler kunodzorwa. (kune light-emitting diodes kune rumwe rutivi rwe optocoupler uye phototransistors kune rumwe rutivi) simba rechiedza richipfuura. Dzora kuramba paCE end ye transistor kune rumwe rutivi, chinja LED power drive chip, uye gadzirisa otomatiki duty cycle ye output signal kuti uwane chinangwa che voltage stabilization.
Kana tembiricha yemhepo ikachinja zvakanyanya, kuyerera kwetembiricha yekuwedzera simba kunova kukuru, izvo zvisingafanirwe kuitwa ne optocoupler. Optocoupler circuit chikamu chakakosha chekuchinjana kwemagetsi.
Nguva yekutumira: Chivabvu-03-2022