Ma motor wamba amapangidwa molingana ndi pafupipafupi komanso ma voliyumu osasunthika, ndipo sangathe kukwaniritsa zofunikira pakuwongolera liwiro la ma frequency converter, kotero sangathe kugwiritsidwa ntchito ngati ma frequency converter motors.
Kusiyana pakati pa ma motor frequency motor ndi mota wamba kumawonekera makamaka muzinthu ziwiri izi:
Choyamba, ma motors wamba amatha kugwira ntchito kwa nthawi yayitali pafupi ndi ma frequency amagetsi, pomwe ma frequency osinthika amatha kugwira ntchito kwa nthawi yayitali pansi pamikhalidwe yomwe imakhala yokwera kwambiri kapena yotsika kuposa ma frequency amagetsi; Mwachitsanzo, mphamvu pafupipafupi m'dziko lathu ndi 50Hz. , ngati injini wamba ili pa 5Hz kwa nthawi yayitali, posachedwapa idzalephera kapena kuwonongeka; ndi mawonekedwe a ma frequency motor motor amathetsa kuperewera kwa mota wamba;
Chachiwiri, makina oziziritsa a ma mota wamba ndi ma motor frequency mosiyanasiyana amasiyana.Dongosolo lozizira la mota wamba limagwirizana kwambiri ndi liwiro lozungulira. Mwa kuyankhula kwina, kuthamanga kwa galimoto kumayenda bwino, kuzizira kumakhala bwino, ndipo pang'onopang'ono galimotoyo imazungulira, zimakhala bwino kuti kuziziritsa kumakhala bwino, pamene makina osinthasintha pafupipafupi alibe vutoli.
Pambuyo powonjezera ma frequency converter ku mota wamba, kutembenuka pafupipafupi kumatha kuzindikirika, koma si injini yosinthira pafupipafupi. Ngati imagwira ntchito mopanda mphamvu kwa nthawi yayitali, injini imatha kuwonongeka.
01 Mphamvu ya chosinthira pafupipafupi pagalimoto makamaka pakuchita bwino komanso kutentha kwagalimoto
The inverter akhoza kupanga milingo yosiyanasiyana ya voteji harmonic ndi panopa pa ntchito, kuti galimoto ikuyenda pansi sinusoidal voteji ndi panopa. , chofunikira kwambiri ndi kutayika kwa mkuwa wa rotor, zotayika izi zimapangitsa injini kutentha kwambiri, kuchepetsa mphamvu, kuchepetsa mphamvu yotulutsa, ndi kukwera kwa kutentha kwa ma motors wamba nthawi zambiri kumawonjezeka ndi 10% -20%.
02 Mphamvu yotchinjiriza ya mota
Ma frequency onyamula ma frequency converter amachokera ku masauzande angapo mpaka opitilira 10 kilohertz, kotero kuti mafunde a stator amayenera kupirira kukwera kwamphamvu kwamagetsi, komwe kuli kofanana ndi kugwiritsa ntchito mphamvu yamagetsi yamoto, zomwe zimapangitsa inter-turn insulation ya injini kupirira mayeso kwambiri. .
03 Phokoso la ma electromagnetic komanso kugwedezeka kwa Harmonic
Mota wamba ikakhala yoyendetsedwa ndi chosinthira pafupipafupi, kugwedezeka ndi phokoso lobwera chifukwa cha ma elekitirodi, makina, mpweya wabwino ndi zinthu zina zimakhala zovuta kwambiri. Ma harmonics omwe amapezeka mumagetsi osinthika amasokoneza ma harmonics amtundu wa gawo lamagetsi la mota kuti apange mphamvu zosiyanasiyana zokomera ma elekitiroma, potero kumawonjezera phokoso. Chifukwa cha kuchuluka kwa ma frequency ogwiritsira ntchito ma mota komanso kusiyanasiyana kwa liwiro lozungulira, ndizovuta kuti mafunde amphamvu amagetsi osiyanasiyana apewe kugwedezeka kwachilengedwe kwa membala aliyense wamagalimoto.
04 Mavuto oziziritsa pa low rpm
Pamene mafupipafupi a magetsi ali otsika, kutayika komwe kumachitika chifukwa cha ma harmonics apamwamba mu mphamvu yamagetsi ndi yaikulu; chachiwiri, pamene liwiro la galimoto limachepa, mpweya wozizira umachepa mofanana ndi kyubu ya liwiro, zomwe zimapangitsa kuti kutentha kwa galimotoyo kusawonongeke komanso kutentha kumakwera kwambiri. kuwonjezeka, n'zovuta kukwaniritsa nthawi zonse makokedwe linanena bungwe.
05 Potengera zomwe zili pamwambapa, makina osinthira pafupipafupi amatengera mapangidwe awa
Chepetsani kukana kwa stator ndi rotor momwe mungathere ndikuchepetsa kutayika kwa mkuwa kwa mafunde ofunikira kuti muwonjezere kutayika kwa mkuwa komwe kumachitika chifukwa cha ma harmonics apamwamba.
Mphamvu yayikulu ya maginito sikhala yodzaza, imodzi ndikulingalira kuti ma harmonics apamwamba adzakulitsa machulukitsidwe a dera la maginito, ndipo inayo ndikulingalira kuti mphamvu yamagetsi ya inverter imatha kuchulukitsidwa moyenera kuti muwonjezere mphamvu yamagetsi otsika. pafupipafupi.
Kamangidwe kamangidwe makamaka kuwongolera mulingo wa kutchinjiriza; kugwedezeka ndi mavuto a phokoso la mota amaganiziridwa bwino; njira yozizira imatengera kuziziritsa kwa mpweya wokakamiza, ndiye kuti, chowotcha chachikulu chozizira chamoto chimatengera njira yodziyimira payokha, ndipo ntchito ya fani yokakamiza yoziziritsa ndikuwonetsetsa kuti mota ikuyenda pa liwiro lotsika. kuzirala.
The coil kugawira capacitance wa variable pafupipafupi galimoto ndi ang'onoang'ono, ndi kukana pepala pakachitsulo zitsulo ndi yaikulu, kotero kuti chikoka cha pulses mkulu pafupipafupi pa galimoto ndi kochepa, ndi inductance kusefa zotsatira za galimoto bwino.
Ma motors wamba, ndiye kuti, ma mota pafupipafupi, amangofunika kuganizira momwe amayambira komanso momwe amagwirira ntchito nthawi imodzi yamagetsi (nambala yapagulu: kulumikizana ndi electromechanical), ndiyeno kupanga injiniyo; pomwe ma mota osinthika pafupipafupi amayenera kuganizira momwe amayambira komanso momwe amagwirira ntchito pamagawo onse osinthika, kenako kupanga mota.
Kuti mugwirizane ndi kukula kwa PWM modulated wave analog sinusoidal alternating current output by the inverter, yomwe imakhala ndi ma harmonics ambiri, ntchito ya ma frequency frequency motor imatha kumveka ngati riyakitala kuphatikiza mota wamba.
01 Kusiyana pakati pa injini wamba ndi mawonekedwe amtundu wamagetsi
1. Zofunikira zapamwamba zowonjezera
Nthawi zambiri, kalasi yotchinjiriza yamagetsi osinthira pafupipafupi ndi F kapena kupitilira apo, ndipo kutchinjiriza pansi ndi mphamvu yotchingira makhoti kuyenera kulimbikitsidwa, makamaka kuthekera kwa kutchinjiriza kupirira voteji.
2. Zofunikira za vibration ndi phokoso la ma frequency frequency motors ndi apamwamba
Makina osinthira pafupipafupi akuyenera kuganizira mozama za kukhazikika kwa zigawo zamagalimoto ndi zonse, ndikuyesera kukulitsa ma frequency ake achilengedwe kuti apewe resonance ndi funde lililonse lamphamvu.
3. Njira yoziziritsa ya ma frequency frequency motor ndi yosiyana
Makina osinthira pafupipafupi nthawi zambiri amatengera kuziziritsa kwa mpweya wokakamiza, ndiye kuti, fan yayikulu yoziziritsa yamagalimoto imayendetsedwa ndi mota yodziyimira payokha.
4. Zofunikira zosiyanasiyana zachitetezo
Njira zopangira kutchinjiriza ziyenera kutsatiridwa pama motors osintha pafupipafupi okhala ndi mphamvu yopitilira 160kW.Chifukwa chachikulu ndikuti ndikosavuta kupanga maginito asymmetrical maginito, komanso kumapanga shaft pano. Pamene mafunde opangidwa ndi zigawo zina zapamwamba kwambiri zimagwira ntchito pamodzi, shaft current idzawonjezeka kwambiri, zomwe zimapangitsa kuti ziwonongeke, choncho njira zotetezera zimatengedwa nthawi zambiri.Pamagetsi amagetsi osinthasintha pafupipafupi, liwiro likapitilira 3000 / min, mafuta apadera okhala ndi kukana kutentha ayenera kugwiritsidwa ntchito kulipirira kukwera kwa kutentha.
5. Makina ozizirira osiyanasiyana
The variable frequency motor cooling fan imayendetsedwa ndi magetsi odziyimira pawokha kuti atsimikizire kuzizira kosalekeza.
02 Kusiyana pakati pa motor wamba ndi ma frequency frequency motor design
1. Electromagnetic Design
Kwa ma motors wamba asynchronous, magawo akulu amachitidwe omwe amaganiziridwa pamapangidwewo ndikuchulukirachulukira, kuyambira magwiridwe antchito, kuchita bwino komanso mphamvu.The variable frequency motor, chifukwa slip yovuta imakhala yosiyana kwambiri ndi mphamvu yamagetsi, ikhoza kuyambika mwachindunji pamene slip yovuta ili pafupi ndi 1. Choncho, mphamvu yowonjezera ndikuyamba ntchito sikuyenera kuganiziridwa mochuluka, koma chinsinsi. vuto lomwe likuyenera kuthetsedwa ndi momwe mungasinthire ma mota awiri. Kusintha kwa mphamvu zopanda sinusoidal.
2. Mapangidwe Apangidwe
Popanga kapangidwe kake, ndikofunikiranso kuganiziranso mphamvu yamagetsi osagwiritsa ntchito sinusoidal pamapangidwe otsekera, kugwedezeka, ndi njira zoziziritsira phokoso zamagalimoto osinthika.
Nthawi yotumiza: Oct-24-2022