Zvinokonzera harmonics mune induction kunyunguduka mavira

Iyo huru yedunhu ye induction melting furnace inogona kushandisa matatu-phase 6-pulse kana matanhatu-phase 12-pulse. Chinangwa chekushandisa 12-pulse rectification ndechekuderedza yakakwirira-order harmonics. Nekuti iyo transformer inoshandisa iyo △/¥ yekubatanidza, iyo 5th uye 7th Harmonic mafungu anodzima mumwe nemumwe kunze mushanduri, achisiya madiki 11th uye 13th harmonics. Kana iyo grid yakakura zvakakwana, inogona kusangana nezvinodiwa zveyero yenyika (GB/T 14549-1993). Nokudaro, harmonics inogona kusatariswa munyaya iyi. Dambudziko rekurapwa kwemafungu: Kana iyo gidhi yemagetsi iri diki, iyo isina mutsara inotakura huwandu yakakura, uye maharmonics anokanganisa zvakanyanya hurongwa hwekugovera magetsi, ipapo iyo harmonic kurapwa inoda kutariswa.

Harmonics akawanda eiyo huru yemagetsi grid frequency (50Hz). Kuburikidza neshanduko yeFourier, basa risiri-sinusoidal rinogona kuoreswa kuita akawanda sine-functional harmonic components, kureva kuti, masaini asiri-sinusoidal anogona kuoreswa kuita zvikamu zvakakosha uye zvitsama neFourier shanduko. Yayo yakawanda, iyo waveform iri kunze kweiyo sine frequency inozivikanwa seyakakosha chikamu, uye inopindura pa frequency. Iyo waveform iri pamusoro inonzi inonzi harmonic component, uye kuwanda kwayo kunonzi 3rd, 5th, 7th, 11th, 13th uye zvimwe zvinowirirana. Iyo dhiyabhorosi dhizaini yeakasiyana harmonic maitiro anoratidzwa muFigure 2-15.

Mufananidzo 2-15 Schematic diagram ye multiple harmonic maitiro