Iyunithi yokumpompa i-beam ivame ukusetshenziswa njengemishini yokumpompa eyinhloko ezindaweni ezihlukahlukene zikawoyela e-China, enezinkinga ezifana nokukhiqizwa okuphansi, ukusetshenziswa kwamandla aphezulu, namahhashi amakhulu adonsa izimoto ezincane. Eminyakeni yamuva nje, ngokuthuthukiswa kobuchwepheshe bamandla kagesi, ubuchwepheshe bokuguqula imvamisa buye basetshenziswa kakhulu ezindaweni zikawoyela ngenxa yezinzuzo zabo njengokonga amandla kanye nokulungiswa kwefrikhwensi elula. Ngesikhathi sokusebenza kweyunithi yokupompa, i-motor kagesi ivame ukugijima esimweni sokukhiqiza.
Ukuze kuxazululwe inkinga yokubuyela emuva kwamandla, okwamanje kunezixazululo ezimbili eziyinhloko zokudonsa amayunithi emikhakheni ehlukahlukene kawoyela e-China:
·Iyunithi ye-Variable frequency braking kanye neyunithi yempendulo yefrikhwensi eguquguqukayo. Ukwengeza iyunithi ye-braking kanye ne-resistor ye-braking ku-busbar kudla ngokuqondile amandla ku-resistor braking, okungagcini nje ukulimaza ukongiwa kwamandla, kodwa futhi kunzima ukuxazulula izinkinga zokushisa ukushisa kanye nempilo ye-resistor braking;
·Amayunithi empendulo ahambisanayo axhunywe kubha yebhasi ukuze abuyisele amandla akhiqizwe injini ngesikhathi sokuphehla ugesi kugridi, athole ukugeleza okubuyela emuva phakathi kwesiguquli kanye negridi. Kodwa-ke, lokhu akuxazululi inkinga yesici samandla aphansi kanye nomthamo ophezulu we-harmonic lapho amandla egeleza esuka kugridi eya ku-inverter.
Ekuphenduleni isimo esingenhla, isisombululo se-quadrant technology four singanqoba ukushiyeka kwezixazululo ezimbili ezishiwo ngenhla. Ubuchwepheshe bokuguqula imvamisa yama-quadrant amane buxazulula inkinga yokucubungula amandla avuselelwayo amayunithi okumpompa lapho isistimu ingalingani, nomsebenzi wama-quadrant amane, kuyilapho kuthuthukiswa ukusebenza kahle kokonga amandla, kunciphisa ukungcoliswa kwe-harmonic kokunikezwa kwamandla, nokuthuthukisa isici samandla. Isiguquli sefrikhwensi yamaquadrant amane samukela ubuchwepheshe bokulungisa be-IGBT obulawulwa yi-PWM, ngokulawula okuphindwe kabili kokulungisa kanye nempendulo yamandla. Ukusebenza kwamaquadrant amane kwangempela kungaxazulula inkinga yokubuyela emuva kwamandla kumayunithi okumpompa.
Isingeniso se-Four Quadrant Frequency Conversion Technology
1, Isimiso Se-Four Quadrant Frequency Converter
I-topology yesekethe yesiguquli se-quadrant frequency converter, esebenzisa ukulungiswa kwe-pulse wide modulation (PWM) yezigaba ezintathu esikhundleni sokulungiswa okungalawulwa, iboniswa kuMfanekiso 1. Ingakwazi ukuguqula amandla omshini womthwalo abe amandla kagesi futhi iwubuyisele kugridi.
Isiguquli sefrikhwensi yamaquadrant amane - isixazululo sokonga amandla samayunithi okumpompa enkundla yamafutha
Umfanekiso 1 Isakhiwo se-Topology sesekethe ye-quadrant frequency converter ezine
2. Izinzuzo ze-Four Quadrant Frequency Converter
Kusetshenziswa iyunithi yokulawula isilungisisi samandla ekhompyutha enesivinini esikhulu nesiphezulu, i-DSP, amapulse ayisithupha e-PWM yemvamisa ephezulu akhiqizwa ukuze kulawuleke ukubaleka nokuvala i-IGBT ohlangothini lwesilungisi. Ukuvula nokuvala kwe-IGBT kusebenza kanye ne-reactor yokufaka ukuze kukhiqizwe i-sine yamanje ye-waveform esesigabeni ne-voltage yokufaka. Lokhu kuqeda ama-harmonics akhiqizwa ukulungiswa kwe-diode nokuhlaziywa, futhi isici samandla siseduze ne-1, ngaleyo ndlela kuqedwe ukungcoliswa kwe-harmonic kugridi yamandla;
Uhlangothi lokulungisa kabusha lobuchwepheshe bokuguqula ama-quadrant amane lusebenzisa amamojula wamandla e-IGBT, angafinyelela ukugeleza okuphindwe kabili kwamandla phakathi kwegridi yokufaka nenjini. Uma uhlelo lungalingani, amandla anamandla akhiqizwa ukungalingani angabuyiselwa kugridi, ukunciphisa kakhulu imfuneko yokulinganisela kwesistimu;
Lapho injini isesimweni sokukhiqiza, amandla akhiqizwa injini abuyiselwa ebhasini le-DC ngokusebenzisa i-diode ohlangothini lwe-inverter. Ukulawulwa kwempendulo eseceleni yokubuyisela kuyaqala, kubuyisela i-DC ku-AC, futhi kubuyisela amandla kugridi ngokulawula isigaba nokuphakama kwe-voltage ye-inverter, ukuzuza imiphumela yokonga amandla.