I-VFD kanye ne-soft starter ingenza imisebenzi efanayo uma kuziwa ekukhuphukeni noma phansi kwenjini.Ushintsho olukhulu phakathi kwalokhu okubili ukuthi i-VFD ingakwazi ukuhlukanisa ijubane lemoto nakuba isiqalisi esithambile silawula kuphela ukuqala nokuma kwaleyo moto.
Uma ubhekene nesicelo, inani, kanye nosayizi kuhambisana nesiqalisi esithambile.I-VFD iyisinqumo esisebenza kahle uma ukulawula isivinini kubalulekile.Kuhle ukuthola umenzi weziqalisi ezithambile onokwethenjelwa wokuthenga umkhiqizo wekhwalithi engcono kakhulu wohlelo lwakho lokusebenza.Ngezansi, ngizokwabelana ngomehluko phakathi kwe-VFD nesiqalisi esithambile esizokusiza ukunquma ukuthi iyiphi idivayisi ongayifuna.
Iyini i-VFD?
I-VFD ngokuvamile imele i-variable frequency drive evame ukusetshenziselwa ukusebenzisa injini ye-AC ngesivinini esiguquguqukayo.Ngokuyisisekelo basebenza ngokulungisa imvamisa yemoto ukulungisa amarempu.
Yini i-Soft Starter?
Amasu afanayo ngokuthi avuselela ukuqala nokumiswa kwamamotho akhiqizayo kodwa anezici ezingafani.
Ngokuvamile zisetshenziswa ezinhlelweni lapho kukhona ukungena okukhulu kwamandla okungalimaza injini ngenkathi i-VFD ilawula futhi kungaphambanisa ukushesha kwenjini.
- Ukusebenza Kwangaphakathi Kwesiqalisi Esithambile
I-stater ethambile yezigaba ezi-3 isebenzisa ama-thyristors ayisithupha noma iziphindisi ezilawulwa nge-silicon, ezigxile ekwakhekeni kwe-anti-parallel ukuze kunyakazise amamotho kagesi kalula.
I-thyristor yakhiwe izingxenye ezi-3:
- Isango elinengqondo
- I-Cathode
- I-Anode
Lapho i-pulse yangaphakathi isetshenziselwa isango, ivumela ukukhukhuleka kwamanje ukusuka ku-anode kuya ku-cathode ebuye iqondise ukuphuma kwamanje ku-motor.
Lapho ama-pulses angaphakathi engagqoki esangweni, ama-SCRs (I-Silicon Controlled Rectifier) asesimweni esingasebenzi ngakho afaka owamanje enjini.
Lawa ma-pulses angaphakathi anqamula i-voltage esetshenzisiwe emotweni eyehlisa ijubane lokungena kwamandla.Ama-pulses abhekiselwa phansi ngesikhathi sokuthambekela ngakho-ke amandla azosetshenziswa kancane kancane enjini.Injini izoqala ifike endaweni yamanje eyisicaba futhi iphume phezulu kakhulu ngesivinini esinqunyiwe ngaphambili.
Injini izohlala kulelo jubane kuze kube yilapho umisa injini lapho isiqalisi esithambile sizokwehlela phansi injini ngendlela efana ncamashi neyokuthuthukela phezulu.
- Ukusebenza Kwangaphakathi kwe-VFD
I-VFD inezingxenye ezintathu, okuhlanganisa:
- Isilungisi
- Hlunga
- I-Inverter
I-rectifier isebenza njengama-diode, yenza imali ku-voltage ye-AC yangaphakathi futhi iyishintshe ku-voltage ye-DC.Futhi isihlungi sisebenzisa ama-capacitor ukuhlanza amandla kagesi e-DC okwenza kube amandla okufika abushelelezi.
Okokugcina, i-inverter isebenzisa ama-transistors ukushintsha i-voltage ye-DC futhi iqondise injini kumafrikhwensi e-Hertz.Lesi sinyathelo sokuvama senza injini ibe ne-RPM eqondile.Ungasetha izikhathi zokuya phezulu neziphansi ngendlela efanayo kusiqalisi esithambile.
I-VFD noma i-Soft Starter?Iyiphi Okufanele Uyikhethe?
Kulokhu osanda kukuhlanganisa;ungabona ukuthi i-VFD ngokuvamile iyisiqalisi esithambile esinokulawula isivinini.Ngakho uhlukanisa kanjani ukuthi iyiphi idivayisi edingekayo kuhlelo lwakho lokusebenza?
Ukukhetha ukuthi iyiphi idivayisi oyikhethayo yehlela ekutheni isicelo sakho sibandakanya i-rheostat engakanani.Kunezinye izici okufanele uzenze ngamabomu esinqumweni sakho.
- Ukulawula Isivinini: Uma uhlelo lwakho lokusebenza ludinga ukungena ngamandla kwamanje kodwa lungafuni ukulawula isivinini, isiqalisi esithambile siyinketho ephezulu.Uma i-speed rheostat idingeka, khona-ke i-VFD ibalulekile.
- Inani: Intengo ingaba isici esichazayo ezinhlelweni eziningi zomhlaba wangempela.Khonamanjalo, isiqalisi esithambile sinezici zokulawula ezingavamile, inani lingaphansi kwe-VFD.
- Usayizi: Okokugcina, uma usayizi wedivayisi yakho kuyithonya elichazayo, iziqalisi ezithambile ngokuvamile zibancane kuneningi lama-VFD.Manje, ake sibheke okunye okuthunyelwe komhlaba wangempela ukuze sikusize ubone ushintsho phakathi kwe-VFD nesiqalisi esithambile.
Ulwazi olubalwe ngenhla luzokusiza ekuhlukaniseni umehluko phakathi kwe-VFD nesiqalisi esithambile.Ungathola omunye wabakhiqizi bezimoto eziziqalela phansi ezihamba phambili e-China, noma kwenye indawo, ukuze uthenge imikhiqizo yekhwalithi ephezulu ngamanani aphusile.
Isikhathi sokuthumela: Nov-15-2023