Mai samar da ra'ayi mai ceton makamashi na Elevator yana tunatar da ku cewa mai sauya mitar lif wani kayan aiki ne na musamman da ake amfani da shi don sarrafa lif. Mai sauya mitar mitoci na musamman samfuri ne mai tsayi tsakanin ƙanana da matsakaitan masu sauya wutar lantarki, wanda ke inganta aikin lif, yana gudana cikin sauƙi, kuma yana tsawaita rayuwar kayan aiki. Haɗe tare da PLC ko sarrafa microcomputer, yana ƙara nuna fifikon kulawar da ba ta da lamba: sauƙaƙe kewayawa, sarrafawa mai sassauƙa, ingantaccen aiki, kulawa mai dacewa da sa ido kan kuskure. Yadda za a zabi mai sauya mitar da ya dace yana taka rawar da babu makawa a cikin lif.
1. Zabin wutar lantarki
A lif aikace-aikace, 7 za a iya zabar bisa ga ikon matakin 616G5 mita converters na daban-daban bayani dalla-dalla kamar 5kW, 11kW, 15 kW, 18.5kW, 22kW, 30kW, da dai sauransu, tare da gina-in braking raka'a kasa 15kW da DC reactors sama da 18.5kW. Yawancin lokaci, a aikace-aikacen lif, masu sauya mitar suma suna buƙatar zaɓin na'urorin birki da masu birki; Hakanan wajibi ne don saita katin saurin PG don samun siginar amsa saurin mai rikodin; Ana kuma buƙatar injin injin AC don aikin janareta na dogon lokaci da sauran wurare na musamman. Ana zaɓar mai sauya mitar gabaɗaya bisa ga matakin ƙara ƙarfin injin. Don cimma ingantaccen aikin sarrafa mitar, ƙarfin mai sauya mitar ya kamata ya dace da buƙatu masu zuwa:
1) Dole ne karfin mai sauya mitar ya zama mafi girma fiye da abin da ake buƙata ta kaya, wato:
2) Ƙarfin mai sauya mitar ba zai iya zama ƙasa da na motar ba, wato:
3) I0 na yanzu na mai sauya mitar ya kamata ya zama mafi girma fiye da na yanzu na motar, wato:
4) Ƙarfin mai sauya mitar yayin farawa ya kamata ya dace da wannan tsari:
Daga cikin su, P0N - ikon fitarwa na mitar mai canzawa (kW);
I0N - Ƙididdigar halin yanzu na mai sauya mitar (A);
GD ² - Juyawa ƙarshen shaft ɗin motsi (N · m ²);
TA - Lokacin hanzari (s); (Za a iya ƙayyade adadin da ke sama bisa ga buƙatun kaya);
K-na halin yanzu waveform ramuwa coefficient (ɗauka kamar 1.05 ~ 1.10 don PWM iko yanayin);
TL load karfin juyi (N · m);
η - ingancin motar (yawanci ana ɗauka azaman 0.85);
Cos φ - ƙarfin wutar lantarki na motar (yawanci ana ɗauka kamar 0 75);
Ƙarfin fitarwa da ake buƙata na motar motar don nauyin PM (kW);
IM motor rated current (A);
Majalisar Dinkin Duniya - Ƙimar wutar lantarki na lantarki (V);
NN - Matsakaicin saurin injin lantarki (r/min).
2. Zaɓin resistor birki
Zaɓin resistor birki yana da mahimmanci. Idan ƙimar juriya na resistor ta yi girma da yawa, ƙarfin birkin ba zai isa ba. Idan darajar juriya ta birki ta yi ƙanƙanta, ƙarfin birkin zai yi girma da yawa kuma resistor zai yi zafi, wanda ke da wuyar warwarewa. Don yanayin da tsayin ɗagawa ya yi girma kuma saurin motar ya yi girma, ana iya rage ƙimar juriya da kyau don samun ƙarfin juriya mafi girma (ƙimar juriya da aka ba da shawarar gabaɗaya ana zaɓar 120% na ƙarfin birki), amma ƙimar juriya ba zata iya zama ƙasa da ƙaramin ƙimar da masana'anta suka ƙayyade ba. Idan mafi ƙarancin ƙima ba zai iya saduwa da jujjuyawar birki ba, ya zama dole a maye gurbin mai sauya mitar tare da mafi girman matakin wuta.
3. Zaɓin shigar da na'urori masu ceton makamashi don masu hawan hawa
Hanyar da aka saba amfani da ita don sarrafa wannan ɓangaren makamashin lantarki a cikin lif mai canzawa shine shigar da naúrar birki da resistor birki a ƙarshen capacitor na DC. Lokacin da wutar lantarki a kan capacitor ya kai wani ƙima, naúrar birki za ta kunna, kuma za a canza ƙarfin wutar lantarki da ya wuce kima zuwa makamashin thermal ta hanyar birkin resistor kuma a watsar a cikin iska. Shigar da na'urar amsawa mai ceton kuzari don masu ɗagawa don maye gurbin naúrar birki da resistor. Ta hanyar gano wutar lantarki ta motar bas ta DC ta atomatik na mai sauya mitar, wutar lantarkin DC na mahaɗin DC na mai sauya mitar ana juyar da shi zuwa wutar lantarki na AC tare da mitar da lokaci iri ɗaya da ƙarfin grid. Bayan mahaɗin tace amo da yawa, an haɗa shi da grid AC don cimma burin kore, kariyar muhalli, da kiyaye makamashi.
Na'urar bayar da amsawar makamashi don masu ɗagawa ita ce ta juyar da ƙarfin lantarki da injin ja na lif ɗin ke samarwa a ƙarƙashin yanayin nauyi mara nauyi zuwa ƙarfin AC mai inganci na mitoci da lokaci iri ɗaya da grid ɗin wutar lantarki, wanda aka mayar da shi zuwa grid ɗin wutar lantarki. Don amfani a cikin uwayen ɗakuna na lif, fitilun shaft ɗin lif, hasken mota, magoya bayan mota, da wuraren da ke kusa da masu lodi (ko wasu na'urori masu kama da juna).