Abahlinzeki bemishini esekela i-frequency converter bakukhumbuza ukuthi ngokwezimiso eziyisisekelo zozibuthe kagesi, i-electromagnetic interference (EMI) kumele ibe nezinto ezintathu: umthombo wokuphazamiseka kazibuthe, indlela yokuphazanyiswa kuka-electromagnetic, kanye nohlelo oluzwelayo ekuphazanyisweni kuka-electromagnetic. Ukuze uvimbele ukuphazamiseka, i-hardware anti-interference kanye ne-software anti-interference ingasetshenziswa. Phakathi kwazo, i-hardware anti-interference iyisilinganiso esiyisisekelo nesibalulekile sokulwa nokuphazamiseka kwezinhlelo zohlelo lokusebenza. Ngokuvamile, ukuphazamiseka kucindezelwa ezicini ezimbili: anti-interference kanye nokuvimbela. Umgomo ojwayelekile uwukucindezela nokuqeda imithombo yokuphazamiseka, ukunqamula imigudu yokuhlanganisa yokuphazamisa ohlelweni, nokunciphisa ukuzwela kwamasignali okuphazanyiswa kwesistimu. Izinyathelo eziqondile kwezobunjiniyela zingabandakanya ukuzihlukanisa, ukuhlunga, ukuvikela, ukubeka phansi, nezinye izindlela.
1. Okubizwa ngokuthi ukuhlukaniswa kokuphazamiseka kubhekisela ekuhlukaniseni umthombo wokuphazanyiswa ezingxenyeni ezithintekayo zesekethe, ukuze zingabi nokuxhumana kukagesi. Kuzinhlelo zokudlulisa isivinini esishintshashintshayo, iziguquli zokuzihlukanisa zivame ukusetshenziswa emigqeni yamandla phakathi kokunikezwa kwamandla kanye namasekhethi esikhulisi ukuvimbela ukuphazamiseka okwenziwe. Iziguquli zokuhlukanisa umsindo zingasetshenziselwa iziguquli zokuhlukanisa amandla.
2. Inhloso yokusetha izihlungi kumjikelezo wesistimu ukucindezela amasiginali okuphazamisa adluliswa ukusuka kusiguquli sefrikhwensi ngomugqa wamandla ukuya ekunikezeni amandla asuka kumotho. Ukunciphisa umsindo nokulahlekelwa kwe-electromagnetic, isihlungi esiphumayo singafakwa ohlangothini oluphumayo lwesiguquli sefrikhwensi; Ukuze unciphise ukuphazamiseka kwamandla, isihlungi sokufaka singafakwa ohlangothini lokufakwayo lwesiguquli sefrikhwensi. Uma kukhona izinto zikagesi ezibucayi kusekethe, isihlungi somsindo samandla singafakwa entanjeni yamandla ukuvimbela ukuphazamiseka okwenziwe. Emijikelezweni yokufaka nokuphumayo yesiguquli semvamisa, ngaphezu kwezingxenye eziphansi ze-harmonic ezibalulwe ngenhla, kukhona futhi ama-harmonic ama-high-frequency currents azosakaza amandla awo ngezindlela ezihlukahlukene, enze izimpawu zokuphazanyiswa kwamanye amadivaysi. Izihlungi ziyizindlela eziyinhloko ezisetshenziselwa ukunciphisa izingxenye ze-harmonic zemvamisa ephezulu. Ngokuya ngezindawo ezahlukene zokusetshenziswa, zingahlukaniswa zibe:
(1) Ngokuvamile kunezinhlobo ezimbili zokuhlunga okokufaka:
a, Izihlungi zolayini ikakhulukazi zakhiwe amakhoyili e-inductive. Kwenza buthaka imisinga ephezulu ye-harmonic ngokukhulisa i-impedance yesekethe kumafrikhwensi aphezulu.
b, Izihlungi ze-radiation ikakhulukazi zakhiwe ngama-capacitor ama-high-frequency capacitor. Izomunca izingxenye ze-harmonic zemvamisa ephezulu ngamandla akhazimulayo.
(2) Isihlungi esiphumayo siphinde sakhiwe ngamakhoyili e-inductive. Ingenza buthaka ngempumelelo izingxenye ze-harmonic ze-oda eliphezulu ekuphumeni kwamanje. Akukhona nje ukuthi inomphumela wokulwa nokuphazamiseka, kodwa futhi ingenza buthaka i-torque eyengeziwe ebangelwa ukuhleleka okuphezulu kwe-harmonic currents emotweni. Ngezinyathelo zokulwa nokuphazamiseka ekugcineni kokuphumayo kwesiguquli sefrikhwensi, izici ezilandelayo kufanele ziqashelwe:
a, Itheminali ephumayo yesiguquli se-frequency ayivunyelwe ukuthi ixhunywe ku-capacitor, ukuze ugweme ukukhiqiza ukushaja okuphezulu okuphezulu (noma ukukhipha) okwamanje lapho i-tube inverter ivuliwe (ivaliwe), engalimaza ishubhu lokuguqula;
b, Uma isihlungi esiphumayo sakhiwe isekethe ye-LC, uhlangothi lwesihlungi esixhunywe ku-capacitor kufanele luxhunywe ohlangothini lwemoto.
3. Ukuvikela imithombo yokuphazamiseka kuyindlela ephumelela kakhulu yokucindezela ukuphazamiseka. Imvamisa, isiguquli semvamisa ngokwaso sivikelwe ngegobolondo lensimbi ukuvikela ukuvuza kokuphazanyiswa kwe-electromagnetic; Kungcono ukuvikela umugqa wokuphuma ngamapayipi ensimbi, ikakhulukazi uma ulawula isiguquli semvamisa ngamasignali angaphandle. Ulayini wesignali kufanele ube mfushane ngangokunokwenzeka (ngokuvamile ngaphakathi kwe-20m), futhi umugqa wesiginali kufanele uvikelwe ngama-cores amabili futhi uhlukaniswe ngokuphelele nolayini wamandla amakhulu (AC380V) kanye nolayini wokulawula (AC220V). Akumele ibekwe endaweni efanayo yamapayipi noma i-trunking, futhi izintambo ezizungezile zempahla kagesi ezizwelayo kufanele zivikelwe. Ukuqinisekisa ukuvikela okusebenzayo, ikhava yokuvikela kufanele isekelwe ngokuthembekile.
4. Isisekelo esifanelekile singacindezela ngempumelelo ukuphazamiseka kwangaphandle ohlelweni futhi sinciphise ukuphazamiseka kwemishini ngokwayo emhlabeni wangaphandle. Ezinhlelweni ezisebenzayo zohlelo lokusebenza, ukuxhumana okunesiphithiphithi komugqa wokungathathi hlangothi kwamandla wesistimu (umugqa ongathathi hlangothi), umugqa ophansi (isisekelo esivikelayo, isisekelo sesistimu), kanye nomhlabathi ovikelayo wesistimu (ukulawula indawo yokuvikela isignali kanye nomhlabathi oyinhloko wokuvikela ucingo) kunciphisa kakhulu ukuzinza nokuthembeka kwesistimu.
Kuziguquli zefrikhwensi, ukubeka phansi okulungile kwamatheminali esekethe eyinhloko PE (E, G) kuyindlela ebalulekile yokuthuthukisa ikhono lokucindezela umsindo lesiguquli sefrikhwensi nokunciphisa ukuphazamiseka kwaso. Ngakho-ke, kufanele yaziswe kakhulu ekusetshenzisweni okungokoqobo. Indawo ephambanayo yocingo oluphansi lwesiguquli sefrikhwensi akufanele ibe ngaphansi kuka-2.5mm2, futhi ubude kufanele bulawuleke phakathi kwama-20m. Kutuswa ukuthi ukubekwa phansi kwesiguquli sefrikhwensi kuhlukaniswe ezindaweni eziphansi zezinye izinto zamandla futhi kungabiwa.
5. Ukusebenzisa ama-reactor
Ingxenye yezingxenye eziphansi ze-harmonic ze-harmonic (i-harmonic yesi-5, i-harmonic yesi-7, i-harmonic ye-11, i-harmonic ye-13, njll.) ku-current input ye-converter frequency iphezulu kakhulu. Ngaphezu kokuphazamisa okungenzeka ekusebenzeni okuvamile kwezinye izinto zokusebenza, futhi zisebenzisa inani elikhulu lamandla asebenzayo, zinciphisa kakhulu isici samandla somugqa. Ukufaka i-reactor kuchungechunge kusekethe yokokufaka kuyindlela ephumelelayo yokucindezela ama-harmonic currents aphansi. Ngokusho kwezikhundla ezihlukene zezintambo, kunezinhlobo ezimbili eziyinhloko:
(1) I-reactor ixhunywe ochungechungeni phakathi kokunikezwa kwamandla kanye nohlangothi olufakiwe lwesiguquli sefrikhwensi. Imisebenzi yayo eyinhloko ihlanganisa:
a、 Ngokucindezela imisinga ye-harmonic, isici samandla sikhuphuka sibe (0.75-0.85);
b, Yenza buthaka umthelela wokukhuphuka kwamanje kusekethe yokufaka kusiguquli sefrikhwensi;
c, Yenza buthaka umthelela wokungalingani kwamandla kagesi.
(2) I-DC ixhunywe ochungechungeni phakathi kwebhuloho lokulungisa kanye ne-capacitor yokuhlunga. Umsebenzi wayo ulula ngokuqhathaniswa, okuwukwenza buthaka izingxenye ze-harmonic ezihleleke kakhulu kumanje okufakwayo. Kodwa iphumelela kakhulu kunama-reactors e-AC ekuthuthukiseni isici samandla, ifinyelela ku-0.95, futhi inezinzuzo zesakhiwo esilula nosayizi omncane.
6. Izintambo ezinengqondo
Ukuze uthole amasignali okuphazamisa asakazwa ngokungeniswa, angenziwa buthaka ngezintambo ezifanele. Izindlela eziqondile zihlanganisa:
(1) Amandla nezintambo zesignali zempahla kufanele zigcinwe kude nemigqa yokufaka neyokukhiphayo yesiguquli sefrikhwensi;
(2) Amandla nemigqa yesignali yezinye izisetshenziswa kufanele igweme ukuhambisana nemigqa yokufaka neyokukhiphayo yesiguquli sefrikhwensi;