Harmonic control scheme ye kudonhedzwa kunyorera vira

Induction yekunyungudutsa furnace: chishandiso chemagetsi chinoshandura 50HZ magetsi frequency alternating current kuita yepakati frequency (300HZ kumusoro kusvika 1000HZ), inoshandura matatu-phase simba frequency alternating current kuita yakananga ikozvino mushure mekugadzirisa, uyezve inoshandura yakananga ikozvino kuita inogadziriswa yepakati. frequency ikozvino yekugovera Iyo yepakati frequency alternating ikozvino inoyerera kuburikidza ne capacitor uye induction coil inogadzira yakakwirira-density magineti mitsara yesimba mune induction coil, uye inocheka iyo simbi zvinhu zviri muinduction coil, iyo inogadzira yakakura eddy ikozvino musimbi. zvinhu.

1. Kushanda musimboti we induction melting vira

Iyo induction yekunyungudutsa choto inonyanya kuumbwa nemagetsi, induction coil uye crucible yakagadzirwa nezvinhu zvinoramba mune induction coil. Iyo crucible ine simbi yekuchaja, iyo yakaenzana neyechipiri mhepo ye transformer. Kana iyo induction coil yakabatana neiyo AC magetsi, inochinjika magineti inogadzirwa mune induction coil. Sezvo iyo yekuchaja pachayo inoumba yakavharwa loop, yechipiri mhepo inoratidzirwa nekutendeuka kumwe chete uye yakavharwa. Nokudaro, induced current inogadzirwa muchaji panguva imwe chete, uye kana iyo induced yezvino ichipfuura nemuchaji, mutero unopisa kusimudzira kunyungudika kwayo.

Iyo induction yekunyungudutsa choto inoshandisa yepakati frequency magetsi kumisikidza yepakati frequency magineti, iyo inoburitsa induced eddy mafungu mukati meiyo ferromagnetic zvinhu uye inogadzira kupisa, kuitira kuti uwane chinangwa chekudziya zvinhu. Iyo induction yekunyungudutsa choto inoshandisa 200-2500Hz yepakati frequency magetsi ekupa induction kupisa, kunyunguduka uye kuchengetedza kupisa. Iyo induction yekunyungudutsa choto inonyanya kushandiswa kunyungudutsa kabhoni simbi, alloy simbi, yakakosha simbi, uye inogona zvakare kushandiswa kunyungudutsa nekudziya kweasina-ferrous simbi semhangura nealuminium. Iyo midziyo idiki muhukuru. , Kurema kwechiedza, kunyatsoshanda, kuderera kwesimba kushandiswa, kukurumidza kunyunguduka uye kupisa, kudzora kuri nyore kwekushisa kwechoto, uye kugadzirwa kwakanyanya.

2. Harmonic maitiro anogadzirwa ne induction melting furace

Kazhinji, 6-pulse induction melting furnaces inonyanya kubudisa 5th uye 7th characteristic harmonics; kune gumi nemaviri-pulse converter zvishandiso, ivo vanonyanya kugadzira yechishanu, yechi12, uye yechi5 hunhu hunoenderana. Mumamiriro ezvinhu akajairika, zvishandiso zvidiki zvinoshandura zvinoshandisa 11 pulses, uye makuru anoshandisa gumi nemaviri pulses. Semuenzaniso, chikamu chechipiri chechipiri chevheji yevheni yakabatanidzwa muY / △ rudzi kuti uwane chikamu chekuchinja kwe13 degrees; kana kuti yakakwira volti divi yeaviri echoto matransformer anotora nhanhatu yekuwedzera kana zigzag Phase-shifting nhanho senge mhando yekubatanidza uye yechipiri-yechipiri-yechipiri-yechipiri nyeredzi-pakona yekubatanidza inoumba 6-pulse yepakati frequency magetsi ekupa kuderedza dhigirii reharmonics ‘simba pa. iyo grid yemagetsi.

Tatu, harmonic njodzi

Iyo induction yakanyunguduka choto inoburitsa huwandu hukuru hwema harmonics kana ichishandiswa, izvo zvinokonzeresa yakakomba kusvibiswa kweharmonic mugidhi remagetsi. Harmonics inoderedza kushanda kwesimba remagetsi kutapurirana uye kushandiswa, inoita kuti midziyo yemagetsi iwedzere kupisa, inogadzira vibration uye ruzha, uye inoita kuti insulation yayo isachembe, kuderedza hupenyu hwebasa, uye kunyange kusashanda kana kupisa; harmonics inogona kukonzera yemuno parallel resonance kana nhevedzano resonance musimba remagetsi. Kurisa iyo harmonic zvirimo, zvichiita kuti capacitor muripo midziyo uye zvimwe midziyo kupisa kunze. Muchiitiko apo reactive simba muripo haigone kushandiswa, reactive simba faindi zvichaitika, zvichikonzera kuwedzera kwemagetsi mabhiri. Harmonics inogona zvakare kukonzera kusashanda kwekuchengetedza relay uye otomatiki zvishandiso, zvichikonzera nyonganiso mukuyerwa kwesimba remagetsi. Kune kunze kwesimba remagetsi, harmonics inokonzeresa kukanganisa kwakanyanya kumidziyo yekutaurirana nemidziyo yemagetsi. Naizvozvo, kuvandudza kunaka kwesimba re induction kunyunguduka mavira rave iro rekutarisa remhinduro.

Yechina, induction inonyungudutsa choto cheharonic control

LBAPF-ZP akateedzana akakosha anoshanda mafirita epakati ma frequency emidziyo anonyanya kukodzera induction inonyungudutsa choto chemoto masisitimu ane yakanyanya kwazvo harmonic yemukati. Inogona kugadzirisa kupisa uye kupisa kwegadziriro iyo mutoro unowanikwa, kuwedzera kwemheremhere, kukundikana kwe capacitor compensation switching, uye zvikamu zvedunhu Kukuvadza uye kukanganisa kunokonzerwa nekunyanyisa harmonic currents sekukuvara.

Iyo LBAPF-ZP yakatevedzana yeakakosha anoshanda mafirita epakati frequency michina akaiswa kuseri kweiyo reactive simba muripo uye pamberi pemutoro. Iyo harmonic kusefa mwero wemutoro wekumashure wakakwira se90%.