Kusankhidwa kwa AC contactor kuwongolera zida zamagetsi zamagetsi

Zida zamtundu uwu zimaphatikizapo ng'anjo zotsutsa, zida zosinthira kutentha, ndi zina zotero. Zomwe zimagwiritsidwa ntchito pamagetsi opangira magetsi zimatha kufika nthawi 1.4 kuposa zomwe zilipo panopa. Ngati kuchuluka kwa magetsi kumaganiziridwa, komweko kumawonjezeka. Kusinthasintha kwaposachedwa kwa katundu wamtunduwu ndikochepa kwambiri, ndi kwa AC-1 malinga ndi gulu logwiritsa ntchito, ndipo ntchitoyo sichitika pafupipafupi. Posankha contactor, m'pofunika kokha kupanga oveteredwa ntchito panopa Ith wa contactor kukhala wofanana kapena kuposa nthawi 1.2 ntchito panopa zipangizo Kutentha magetsi.
3.2 Kusankhidwa kwa zolumikizira zowongolera zida zowunikira
Pali mitundu yambiri ya zida zowunikira, ndipo mitundu yosiyanasiyana ya zida zowunikira zimakhala ndi nthawi yoyambira komanso nthawi yoyambira. Gulu logwiritsa ntchito mtundu uwu wa katundu ndi AC-5a kapena AC-5b. Ngati nthawi yoyambira ndi yochepa kwambiri, Ith yotentha yamakono ikhoza kusankhidwa kukhala yofanana ndi 1.1 nthawi yogwiritsira ntchito zida zowunikira. Nthawi yoyambira ndi yayitali ndipo mphamvu yamagetsi ndi yotsika, ndipo kutentha kwake kwamakono Ith kungasankhidwe kuti ikhale yaikulu kuposa momwe ikugwiritsira ntchito zida zowunikira. Table 2 limasonyeza kusankha mfundo za contactors kwa zida zosiyanasiyana kuyatsa.
Kusankha mfundo za contactors kwa zipangizo zosiyanasiyana kuyatsa
Nambala ya serial Dzina lazida zowunikira Kuyambitsa magetsi Mphamvu yoyambira Nthawi yoyambira Contactor mfundo yosankha
1 nyali ya incandescent 15Ie1Ith≥1.1Ie
2 Kuwala kosakanikirana 1.3Ie≈13Ith≥1.1×1.3Ie
3 Nyali ya Fluorescent ≈2.1Ie0.4～0.6Ith≥1.1Ie
4High-pressure mercury nyali≈1.4Ie0.4 ~0.63 ~5Ith≥1.1×1.4Ie
5 zitsulo halide nyali 1.4Ie0.4～0.55～10Ith≥1.1×2Ie
Nyali za 6 zokhala ndi nambala yosindikiza mphamvu 20Ie0.5～0.65～10 zimasankhidwa molingana ndi momwe ma capacitor amayambira
3.3 Kusankhidwa kwa contactors kulamulira magetsi kuwotcherera thiransifoma
Pamene otsika-voltage thiransifoma katundu chikugwirizana, thiransifoma adzakhala ndi tsinde lalifupi lalitali panopa chifukwa cha yochepa dera maelekitirodi mbali yachiwiri, ndipo lalikulu panopa adzaonekera pa choyambirira mbali, amene akhoza kufika 15. mpaka 20 kuwirikiza pakali pano. zokhudzana ndi chikhalidwe chapakati.Pamene makina owotcherera amagetsi nthawi zambiri amatulutsa mphamvu zadzidzidzi, kusinthana kumbali yoyamba ya thiransifoma.
> Pansi pa nkhawa yaikulu ndi panopa, contactor ayenera kusankhidwa malinga ndi lalifupi dera panopa ndi kuwotcherera pafupipafupi mbali yaikulu pamene maelekitirodi ndi yochepa-circuited pansi pa oveteredwa mphamvu ya thiransifoma, ndiko kuti, kusintha panopa ndi wamkulu kuposa mbali yoyamba-mbali yamakono pamene mbali yachiwiri ndi yochepa-yozungulira. Gulu logwiritsira ntchito katundu wotere ndi AC-6a.
3.4 Kusankhidwa kwa motor contactor
Othandizira magalimoto amatha kusankha AC-2 mpaka 4 malinga ndi ntchito yagalimoto ndi mtundu wagalimoto. Pakuyambira pakali pano ka 6 nthawi yomwe idavoteledwa komanso kusweka pakali pano, AC-3 itha kugwiritsidwa ntchito. Mwachitsanzo, mafani, mapampu, ndi zina zotero, angagwiritse ntchito tebulo loyang'ana Njira ndi njira yosankhidwa yokhotakhota imasankhidwa malinga ndi chitsanzo ndi buku, ndipo palibe kuwerengera kwina komwe kumafunika.
Mapiringidwe apano ndi kusweka kwa mota yamabala onse ndi 2.5 kuwirikiza pakali pano. Nthawi zambiri, poyambira, chopinga chimalumikizidwa motsatizana ndi rotor kuti achepetse zoyambira ndikuwonjezera torque yoyambira. Gulu ntchito ndi AC-2, ndi contactor rotary akhoza kusankhidwa.
Pamene injini ikuthamanga, kuthamanga mobwerera mmbuyo ndi braking, cholumikizira chapano ndi 6Ie, ndipo gulu logwiritsa ntchito ndi AC-4, lomwe ndi lolimba kwambiri kuposa AC-3. Mphamvu zamagalimoto zitha kuwerengedwa kuchokera pamafunde omwe alembedwa pansi pa Gulu Logwiritsa Ntchito AC-4. Fomula yake ndi iyi:
Pe=3UeIeCOS￠η,
Ue: magetsi ovoteledwa ndi mota, COS￠: mphamvu yamagetsi, η: kuyendetsa bwino kwagalimoto.
Ngati moyo wa kukhudzana ukuloledwa kukhala waufupi, AC-4 panopa akhoza kuchulukitsidwa moyenera, ndipo akhoza kusinthidwa kukhala AC-3 pa otsika kwambiri pa-off pafupipafupi.
Malinga ndi zomwe zimafunikira pakulumikizana kwachitetezo chagalimoto, zomwe zili pansipa zokhoma-rotor pano ziyenera kulumikizidwa ndikusweka ndi chipangizo chowongolera. Makina okhoma okhoma pama motors ambiri a Y ndi ≤7Ie, chifukwa chake kutsegula ndi kutseka kozungulira kozungulira kuyenera kuganiziridwa posankha cholumikizira. Mafotokozedwe amanena kuti pamene galimoto ikuyenda pansi pa AC-3 ndipo oveteredwa panopa wa contactor si wamkulu kuposa 630A, contactor ayenera kupirira 8 nthawi oveteredwa panopa kwa masekondi osachepera 10.
Pakuti ambiri zida Motors, ntchito panopa ndi zosakwana oveteredwa panopa, ngakhale poyambira panopa kufika 4 mpaka 7 nthawi oveteredwa panopa, koma nthawi yochepa, ndi kuwonongeka kwa kulankhula kwa contactor si lalikulu. Izi zakhala zikuganiziridwa pamapangidwe a cholumikizira, ndipo nthawi zambiri zimasankhidwa Kulumikizana kwamagetsi kuyenera kukhala kokulirapo kuposa 1.25 kuchuluka kwamagetsi ovotera. Kwa ma motors omwe amagwira ntchito mwapadera, amayenera kuganiziridwa molingana ndi momwe amagwirira ntchito. Mwachitsanzo, chokweza chamagetsi ndi cha katundu wolemetsa, katundu wolemetsa amayamba ndikuyima pafupipafupi, kusokoneza kugwirizana kwa braking, etc., kotero kuwerengera kwa ntchito yamakono kuyenera kuchulukitsidwa ndi angapo omwe akugwirizana nawo, chifukwa katundu wolemera amayamba ndikuyima kawirikawiri. , sankhani nthawi 4 zomwe zidavotera pakalipano, nthawi zambiri sinthani kulumikizana pansi pa katundu wolemetsa Mphamvu ya braking imakhala yowirikiza kawiri poyambira, kotero kuti nthawi 8 zomwe zidavoteredwa ziyenera kusankhidwa pazomwe zikugwira ntchito.