I. Muchidimbu
Izvo zvinhu zvitatu zvekukanganiswa kwemagetsi ndiko kunobva kukanganisa, nzira yekukanganisa yekufambisa, inopindira inogamuchira, EMC yakatenderedza nyaya idzi dzekutsvaga.Nzira dzakanyanya kupindira dzekudzvanyirira ndedziviriro, kusefa, kuisa pasi.Ivo vanonyanya kushandiswa kugura nzira yekufambisa yekuvhiringidza.
Nhasi totaura nezve EMC kusefa, EMC kugadziridzwa munzira dzinowanzo shandiswa kusefa dzine nzira dzakasiyana, dzinotevera isu tichabva pamhando idzi dzemasefa nzira, kuongororwa kwezvinhu zvinoda kutariswa mukuita kwekushandisa.
II.Magnetic kusefa
Magnetic kusefa kuri kuburikidza nekuunzwa kwemagineti zvikamu mudunhu, kuvharira kupararira kwepamusoro-frequency ruzha uye kuratidza, nekudaro kuderedza kukanganiswa kwemagetsi.Zvakajairwa magineti zvikamu zvinosanganisira magineti mhete, bar magineti, makoiri, nezvimwe.
(1) Frequency renji: Iyo frequency hunhu hwemagineti mafirita inodzikamisa huwandu hwekuvhiringidza ma frequency aanogona kudzvanya.Naizvozvo, kana uchisarudza magineti sefa, zvinodikanwa kuti uone yaunoda frequency renji yekudzvinyirira uye sarudza yakakodzera sefa.
(2) Rudzi rwesefa: Mhando dzakasiyana dzemagineti mafirita anoita zvakasiyana kune akasiyana marudzi ekuvhiringidza masosi.Semuyenzaniso, magineti loop mafirita anowanzo kukodzera kune yakakwira-frequency ruzha masosi, nepo coil mafirita akanyanya kukodzera kune yakaderera-frequency ruzha masosi.Naizvozvo, pakusarudza magineti sefa, hunhu hwekuvhiringidza sosi uye hunhu hwesefa hunoda kutariswa.
(3) Nzvimbo yekuisa: Magnetic mafirita anofanirwa kuisirwa pakati pekukanganisa sosi uye yakakanganiswa midziyo kuitira kuti inyatso kusefa kunze kwekukanganisa.Nekudaro, zvinodikanwa kudzivirira kuisa iyo magineti sefa mune yakanyanya tembiricha kana yakakwirira vibration nharaunda kuti ive nechokwadi chekuvimbika kwayo uye kugadzikana.
(4) Ground connection: Kubatana kwepasi kune zvakakosha pakushanda kwemagineti mafirita.Kunyatso kubatanidza waya yepasi kunogona kuwedzera mashandiro esefa, kunatsiridza kudzvanya maitiro uye kuderedza kukanganiswa kwemagetsi.
III.Capacitive sefa
Capacitive sefa: Nekuunza capacitive zvinhu mudunhu, iyo yakakwira-frequency ikozvino inotungamirwa pasi kuti ideredze radiation uye kupararira kwekukanganisa kwemagetsi.
(1) Mhando dzema capacitors: Kune marudzi akasiyana-siyana emagetsi, akadai se tantalum electrolytic capacitors, aluminium electrolytic capacitors uye ceramic capacitors.Mhando dzakasiyana dze capacitor dzine maitiro akasiyana kune akasiyana ma frequency renji, saka iwe unofanirwa kusarudza iyo chaiyo capacitor zvinoenderana nemamiriro chaiwo.
(2) Frequency renji: Iyo frequency maitiro e capacitive mafirita anodzikamisa kuwanda kwehuwandu hwekukanganisa kwavanogona kudzvanyirira.Naizvozvo, pakusarudza capacitive mafirita, zvinodikanwa kuti uone inodiwa kudzvinyirira frequency renji uye sarudza yakakodzera sefa.
(3) Kusarudzwa kwekukosha kwekugona: Kukosha kwecapacitance ye capacitor inobata zvakananga maitiro ayo ekusefa, iyo yakakura iyo capacitance kukosha, zviri nani kusefa.Asi usasarudza yakakura capacitance, kuitira kuti urege kuva nemigumisiro yakaipa pakushanda kwakajairika kwedunhu.
(4) Kupisa maitiro: kukwanisa kwe capacitor kuchachinja nekuchinja kwekushisa.Munzvimbo yepamusoro yekupisa, simba re capacitor richadzikira, nekudaro richikanganisa kusefa kwayo.Nokudaro, pakusarudza capacitors, zvakakosha kufunga nezvehutano hwavo hwekushisa uye sarudza ma capacitors ane kugadzikana kwakanaka kwekushisa.
IV.Impedance sefa
Impedance sefa: Nekuunza impedance zvikamu mudunhu, dunhu rine yakakwira impedance kune chiratidzo cheiyo frequency, nokudaro kuderedza kana kubvisa kupindira uye ruzha.Zvakajairwa impedance zvikamu zvinosanganisira inductors, transformers, nezvimwe.
(1) Frequency renji: Iwo ma frequency maitiro e impedance mafirita anodzikamisa huwandu hwekukanganisa ma frequency avanogona kudzvanya.Naizvozvo, kana uchisarudza iyo impedance sefa, zvinodikanwa kuti uone yaunoda frequency renji yekudzvinyirira uye sarudza yakakodzera sefa.
(2) Impedance type: Mhando dzakasiyana dze impedance dzine maitiro akasiyana emhando dzakasiyana dzekuvhiringidza masosi.Semuenzaniso, inductors akakodzera kune yakakwira-frequency ruzha masosi, nepo ma transformer ari akakodzera kune yakaderera-frequency ruzha masosi.Naizvozvo, pakusarudza impedance mafirita, zvinodikanwa kuita sarudzo yenhamba dzakakodzera zvinoenderana nehunhu hwekupindira sosi uye hunhu hwesefa.
(3) Impedance yekufananidza: Mhedzisiro ye impedance mafirita inokanganiswa ne impedance yekufananidza.Kana iyo impedance isingaenzaniswi, ipapo mhedzisiro yesefa ichaderedzwa zvakanyanya.Naizvozvo, kana uchigadzira uye nekuisa impedance mafirita, zvinodikanwa kuve nechokwadi kuti iyo impedance inofananidzwa uye kuti yakakodzera kubatana kunoshandiswa.
(4) Nzvimbo yekuisa: Impedance mafirita anofanirwa kuiswa pakati pekukanganisa sosi nemidziyo yakakanganiswa kuitira kuti inyatso kusefa kunze kwekukanganisa.Nekudaro, zvinodikanwa kudzivirira kuisa iyo impedance sefa mune yakanyanya tembiricha kana yakakwirira vibration nharaunda kuti ive nechokwadi chekuvimbika kwayo uye kugadzikana.
(5) Ground Connection: Yakakwana yepasi yekubatanidza ndiyo kiyi yekuonesa kuita kwe impedance mafirita.Kunyatso kubatanidza waya yepasi kunogona kuwedzera mashandiro eiyo impedance sefa, kunatsiridza kudzvanya maitiro uye kuderedza kukanganiswa kwemagetsi.
V. Band Pass Sefa
Band-pass kusefa inobvumira masaini mune yakatarwa frequency renji kuti apfuure nepo achidzvanya masaini mune mamwe ma frequency renji.
(1) Center frequency: Iyo yepakati frequency yebhendi-pass sefa ndiyo frequency yechiratidzo chinopfuudzwa, saka zvinodikanwa kusarudza yakakodzera yepakati frequency.
(2) Bandwidth: Iyo bandwidth yebhendi sefa inotsanangura iyo frequency renji yechiratidzo chinopfuudzwa, saka zvinodikanwa kusarudza yakakodzera bandwidth.
(3) Passband uye Stopband: Iyo passband yebhendi sefa inotsanangura iyo frequency renji yechiratidzo inopfuura, nepo stopband ichitsanangura frequency renji yechiratidzo chinodzvanywa.Paunenge uchisarudza sefa, zvinodikanwa kuti usarudze yakakodzera passband uye stopband renji zvinoenderana nezvinodiwa zvekushandisa.
(4) Filter type: Kune marudzi akasiyana-siyana emafirita ebhendi, akadai sechipiri-order filters, Butterworth filters, Chebyshev filters, etc. Mhando dzakasiyana dzemafirita dzine maitiro akasiyana.Mhando dzakasiyana dzemafirita dzine mashandiro akasiyana, saka zvinodikanwa kuti usarudze iyo yakakodzera mhando yefirita zvinoenderana nechaiyo application mamiriro.
(5) Frequency mhinduro: Iyo frequency mhinduro ye bandpass sefa ine zvakakosha pakuita kwayo.Kuti uve nechokwadi chekufambiswa kwemhando yechiratidzo, zvinodikanwa kuve nechokwadi chekuti frequency mhinduro yakadzikama sezvinobvira uye hapana chisingadiwe resonance chiitiko mudhizaini.
(6) Kugadzikana: Band-pass mafirita anofanirwa kuchengetedza kuita kwakagadzikana, saka zvinodikanwa kuti usarudze zvemhando yepamusoro zvikamu uye yakakodzera dhizaini dhizaini kuti ive nechokwadi chekugadzikana kwe zero kuyambuka frequency uye amplitude.
(7) Kusiyanisa kwetembiricha: Kuita kwebhendi-pass mafirita kuchadonha nekuda kwekuchinja kwekushisa kwemukati.
VI.Summary
Kusefa ndiyo imwe yedzakajairika nzira dzatinoshandisa kugadzirisa EMC matambudziko.Kuti tigadzirise matambudziko eEMC nemazvo, isu tinofanirwa kunzwisisa dambudziko racho zvizere, kuita zvirongwa, kuita zvirongwa, kuona mhedzisiro, kuenderera mberi nekuvandudza nekusimbisa manejimendi.Nenzira iyi chete tinogona kugadzirisa matambudziko eEMC nekuvandudza mashandiro eEMC ehurongwa.
Zhejiang NeoDen Technology Co., LTD., yakavambwa muna 2010, inyanzvi inogadzira nyanzvi muSMT pick and place machine, reflow oven, stencil printing machine, SMT production line nezvimwe Zvigadzirwa zveSMT.Isu tine yedu R & D timu uye fekitori pachedu, tichitora mukana weiyo yedu yakapfuma ine ruzivo R&D, yakanyatso dzidziswa kugadzirwa, yakawana mukurumbira mukuru kubva kune vatengi pasi rese.
Isu tinotenda kuti vanhu vakuru uye vatinoshanda navo vanoita NeoDen kambani hombe uye kuti kuzvipira kwedu kune Innovation, Diversity uye Sustainability inovimbisa kuti SMT otomatiki inowanikwa kune wese hobbyist pese pese.
Nguva yekutumira: Aug-09-2023