Abahlinzeki beyunithi yempendulo bakukhumbuza ukuthi ekusetshenzisweni kwansuku zonke, isekethe yokulungisa ibhuloho yeziguquli zefrikhwensi evamile inezigaba ezintathu ezingalawuleki, ngakho-ke akunakwenzeka ukufeza ukudluliswa kwamandla okuqondiswa kabili phakathi kwesekethe ye-DC kanye nokunikezwa kwamandla. Indlela ephumelela kakhulu yokuxazulula le nkinga ukusebenzisa ubuchwepheshe be-inverter obusebenzayo, obuguqula amandla kagesi avuselelwe abe amandla e-AC wefrikhwensi efanayo nesigaba njengegridi bese iwaphakela iwabuyisele kugridi. Isilungisi samanje se-PWM sokulandelela siyamukelwa, okwenza kube lula ukuzuza ukugeleza kwamandla aqondiswa kabili futhi sinesivinini sokuphendula esiguqukayo esisheshayo. Isakhiwo esifanayo se-topology sisivumela ukuthi silawule ngokugcwele ukushintshana kwamandla asebenzayo futhi asebenzayo phakathi kwezinhlangothi ze-AC ne-DC, ngokusebenza kahle okungafika ku-97% kanye nezinzuzo ezibalulekile zezomnotho. Ukulahlekelwa ukushisa ngu-1% webhuleki yokusetshenziswa kwamandla, kuyilapho kungangcolisi igridi yamandla. Ngakho-ke, i-feedback braking ifaneleka ngokukhethekile ezimweni ezidinga ukubhuleka njalo, futhi amandla emoto kagesi nawo aphezulu. Ngalesi sikhathi, umphumela wokonga amandla ubalulekile, ngesilinganiso esingaba ngu-20% womphumela wokonga kuye ngezimo zokusebenza.
Izimo zokubhuleka impendulo ye-inverter
(1) Phakathi nenqubo yokunciphisa isivinini semoto kagesi kusukela ngesivinini esikhulu (fH) kuya esivinini esiphansi (fL), imvamisa iyancipha ngokuzumayo. Ngenxa ye-inertia yomshini we-motor kagesi, i-slip s<0, kanye ne-motor kagesi isesimweni sokukhiqiza. Ngalesi sikhathi, i-electromotive force yangemuva E>U (i-terminal voltage).
(2) Injini kagesi isebenza ku-fN ethile, futhi uma ima, fN=0. Phakathi nale nqubo, i-motor kagesi ingena esimweni sokusebenza esikhiqizayo, kanye ne-electromotive force yangemuva E> U (i-terminal voltage).
(3) Ngemithwalo yamandla engaba khona (noma amandla angaba khona), njengalapho u-crane uphakamisa izinto ezisindayo futhi wehla, uma isivinini sangempela n sikhulu kunejubane elihambisanayo elingu-n0, injini kagesi nayo izoba sesimweni sokusebenza kokukhiqiza amandla, lapho i-E>U.
Izici ze-frequency converter impendulo braking
(1) Ingasetshenziswa kabanzi ekusebenzeni okonga amandla kuzimo zokubhuleka impendulo ye-PWM AC.
(2) Ukusebenza kahle kwempendulo, efinyelela ngaphezu kwama-97.5%; Ukulahlekelwa ukushisa okuphansi, u-1% kuphela wokusetshenziswa kwamandla.
(3) Isici samandla sicishe silingane no-1.
(4) I-harmonic current incane, ibangela ukungcola okuncane kugridi yamandla futhi inezici zokuvikela imvelo okuluhlaza.
(5) Londoloza utshalomali futhi ulawule kalula izingxenye ezivumelanayo nezisebenzayo ngasohlangothini lokuphakelwa kwamandla.
(6) Ekudluliselweni kwezimoto eziningi, amandla okuvuselela omshini ngamunye angasetshenziswa ngokugcwele.
(7) Inomphumela obalulekile wokonga amandla (ohlobene nezinga lamandla nezimo zokusebenza zenjini).
(8) Uma indawo yokusebenzela inikwe amandla ibhasi le-DC okwabelwana ngalo kumadivayisi amaningi, amandla asuka ekubhulekini impendulo angabuyiselwa ngokuqondile ebhasini le-DC ukuze lisetshenziswe ezinye izisetshenziswa. Ngemuva kokubala, ingasindisa umthamo wama-inverters wempendulo, futhi isuse ngisho nesidingo sama-inverters wempendulo.
Izimo zohlelo lokusebenza lwe-frequency converter impendulo braking
(1) Isihlukanisi esinesivinini esikhulu esisetshenziselwa ukucwebezela kweglucose ezimbonini zokwenza imithi.
(2) Isihlukanisi esinesivinini esikhulu sokucwebezela kukashukela we-civil (ushukela oyi-granulated).
(3) Izixube zikapende nezixube ezisetshenziswa ekugezeni izitshalo.
(4) Imishini yokudaya, imishini yokuhlanganisa, nezixube ezisetshenziswa ezimbonini zepulasitiki.
(5) Imishini yokuhlanza eyisayizi ephakathi nendawo ukuya enkulu, okomisa amanzi emzimbeni, kanye nokomisa amanzi okuphotha okusetshenziselwa ukuwasha izitshalo.
(6) Imishini yokuwasha, imishini yokuhlanza amashidi emibhede, njll. esetshenziswa emahhotela, ezindlini zezivakashi, nasezindaweni zokuwasha.
(7) Ama-centrifuge anesivinini esiphezulu kanye nezihlukanisi ezimbonini ezikhethekile zemishini ye-centrifugal.
(8) Imishini yokulahla ehlukahlukene efana neziguquli, izilebhu zensimbi, njll.
(9) Imishini yokuphakamisa efana nebhuloho, umbhoshongo, nezingwegwe ezinkulu zokuphakamisa ezingaphakanyiswa (isimo sokusebenza lapho izinto ezisindayo zehliswa).
(10) Sika ibhande lokuthutha elinomthamo omkhulu wokuthwala umthwalo.
(11) Amakheji alengayo (okulayisha noma ukuthulula) kanye nezimoto zasezimayini ezithambekile ezimayini.
(12) Amadivayisi ahlukahlukene wokwenza kusebenze isango.
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