Umshini wamanje we-shaft ungumbulali wekhwalithi omkhulu wama-motor anemvamisa eguquguqukayo, ama-motor amakhulu,ama-motor ane-voltage ephezulukanye namajeneretha, futhi kuyingozi kakhulu ohlelweni lokuthwala izinsimbi. Kunezimo eziningi zokwehluleka kohlelo lokuthwala izinsimbi ngenxa yokuntuleka kwezinyathelo zokuvimbela ugesi we-shaft.
Izici zamanje we-shaft ziyi-voltage ephansi kanye ne-current ephezulu, futhi umonakalo ohlelweni lokuthwala kungathiwa kunzima ukuwuvimbela. Ukukhiqizwa kwamanje we-shaft kungenxa ye-voltage ye-shaft kanye ne-closed circuit. Ukuze kuxazululwe inkinga yamanje we-shaft, kunezindlela ezimbili zokuyixazulula: ukususa i-voltage ye-shaft noma ukunqamula i-circuit.
Ukungalingani kwesekethe yamagnetic, ukunikezwa kwamandla kwe-inverter, ukungeniswa kwe-electrostatic, ukushaja okungaguquki kanye nokuphazamiseka kokunikezwa kwamandla kwangaphandle konke kungadala i-voltage ye-shaft. I-amplitude ye-voltage ye-shaft ngokuvamile incane, kodwa uma ifinyelela inani elithile, izodabula ifilimu kawoyela wokugcoba we-bearing bese idlula ku-loop evaliwe ebusweni be-bearing. Ugesi omkhulu we-shaft uzobangela ukuthi i-bearing ishise ngenxa yokushisa ngesikhathi esifushane kakhulu. I-bearing eshiswe ugesi we-shaft izoshiya uphawu olufana nebhodi lokugeza ebusweni bangaphandle bendandatho yangaphakathi ye-bearing.
Ukuze kuxazululwe inkinga yokugwema ugesi womgodi, kumele kuthathwe izinyathelo ezidingekayo ekwakhiweni nasekukhiqizweni kwemoto, njengokufaka izinyathelo ezidingekayo zokuvikela ugesi esivalweni sokugcina kanye nesivikelo sokuthwala. Emikhiqizweni emincane, ama-insulating bearings angasetshenziswa, futhi amabhulashi ekhabhoni avuzayo angangezwa ngesikhathi sokusetshenziswa. Ngokombono wokusetshenziswa, ukuthatha izinyathelo zokuxhuma izingxenye kuyisinyathelo esithathwa kanye kuphela, kuyilapho ukusetshenziswa kokuphambukisa kungabangela inkinga yokushintsha idivayisi yebhulashi lekhabhoni. Okungenani, uhlelo lwebhulashi lekhabhoni akufanele lube nezinkinga ngesikhathi somjikelezo wokugcinwa kwemoto.
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Amabheringi afakwe ugesi
Ubukhulu kanye nomthamo womthwalo wama-insulated bearings kufana nokwama-flange bearings ajwayelekile. Umehluko ukuthi ama-insulated bearings angavimbela ukudlula komsinga kahle kakhulu. Ama-insulated bearings angagwema umonakalo obangelwa ukugqwala kukagesi. Ngakho-ke, angasetshenziswa ezinjinini ukuqinisekisa ukusebenza okuthembekile kakhulu kunama-insulated bearings ajwayelekile. Ama-insulated bearings angagwema umphumela we-electro-corrosion womsinga obangelwa kuma-bearings futhi avimbele umsinga ekulimazeni amafutha, izinto ezigoqekayo, kanye nemigwaqo yomjaho.
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Kungani ukunikezwa kwamandla e-inverter kukhiqiza i-voltage ye-shaft?
Uma injini isebenza ngogesi we-inverter, i-voltage yokunikezwa kwamandla iqukethe izingxenye ze-harmonic eziphezulu, ezibangela ukungeniswa kwe-electromagnetic phakathi kweziphetho ze-coil ezigoqayo ze-stator, ingxenye yezintambo, kanye ne-shaft ejikelezayo, ngaleyo ndlela ikhiqize i-voltage yomgodi.
Ukugoqa kwe-stator kweinjini engavumelaniifakiwe ku-stator core slot. Kukhona ama-capacitance asakazekile phakathi kokujika kwe-stator winding naphakathi kwe-stator winding kanye nesisekelo se-motor. Lapho i-general frequency converter isebenza nge-carrier frequency ephezulu, i-common mode voltage ye-inverter ishintsha kakhulu, okuzokwakha i-leaking current kusuka ku-motor casing kuya ku-ground terminal ngokusebenzisa i-distributed distribution capacitance ye-motor winding. Lo mshini wokuvuza ungakha izinhlobo ezimbili zokuphazamiseka kwe-electromagnetic, i-radioactive kanye ne-conductive. Ngenxa yokungalingani kwesekethe ye-motor magnetic, i-electrostatic induction kanye ne-common mode voltage yizimbangela ze-shaft voltage kanye ne-shaft current.
Isikhathi sokuthunyelwe: Agasti-13-2024