Kugadzika iyo Mota Shaft Inovandudza Kuvimbika kweInverter-Powered Motors

Mainjiniya ekugadzirisa ari pamusoro pezvivakwa zvekutengesa kana zvidyarwa zvemaindasitiri anogara achidzoreredza mota uye kutarisa zvimwe zviratidzo zvekuneta, uye pasina ekudzivirira ekugadzirisa maturusi kana yepamberi yekudzora software yekupa yambiro, mainjiniya anogona kumira ofunga kuti, "Ndedzipi idzi mota dziri kuwedzera?"Kuri kuwedzera ruzha here, kana kuti uku kungofungidzira kwangu?”Injiniya ane ruzivo rwemukati ma sensors (kunzwa) uye hunches (kufanotaura maaramu) emota anogona kunge ari echokwadi, nekufamba kwenguva, mabearings ari pakati pekusaziva kwemunhu.Premature kupfeka munyaya yacho, asi nei?Ziva nezveichi "nyowani" chikonzero chekutadza kubereka uye ziva maitiro ekudzivirira nekubvisa zvakajairika mode voltages.

Sei injini dzichikundikana?

Kunyange paine zvakawanda zvakasiyana zvikonzero zvekutadza kwemota, nhamba yekutanga chikonzero, nguva nenguva, iri kutakura kukundikana.Maindasitiri motors anowanzo kuona akasiyana ezvakatipoteredza zvinhu zvinogona kukanganisa hupenyu hwemota.Nepo kusvibiswa, hunyoro, kupisa kana kurodha zvisizvo zvinogona kukonzera kutadza kubereka nguva isati yakwana, chimwe chiitiko chinogona kukonzera kutadza kubereka chinowanzoitwa mode voltage.

Common mode voltage

Mota zhinji dziri kushandiswa nhasi dzinomhanya pamharadzano-mutsara voltage, zvinoreva kuti dzakabatanidzwa zvakananga kune matatu-chikamu simba rinopinda munzvimbo (kuburikidza nemota inotangisa).Mota dzinofambiswa nemadhiraivha madhiraivha dzave kuwanda sezvo maapplication ave akaomarara mumakumi mashoma emakore apfuura.Kubatsira kwekushandisa inosiyana frequency drive kutyaira mota ndeyekupa kumhanya kudzora mumashandisirwo akadai semafeni, mapombi uye maconveyors, pamwe nekumhanyisa mitoro pakunyatsogona kuchengetedza simba.

Imwe yakashata yekusiyanisa madhiraivha madhiraivha, zvisinei, mukana weakajairwa modhi voltages, izvo zvinogona kukonzerwa nekusaenzana pakati pedhiraivha yechitatu-chikamu chekuisa voltages.Iyo yakakwirira-yekumhanyisa switch ye pulse-width-modulated (PWM) inverter inogona kukonzera matambudziko emotor windings uye mabearings, iwo mamhepo akachengetedzwa zvakanaka neinverter anti-spike insulation system, asi kana rotor ikaona voltage spikes ichikwira, ikozvino. inotsvaga Nzira yekuramba kushoma pasi: kuburikidza nemabhengi.

Mota mabearings akaiswa girizi, uye mafuta ari mugizi anoumba firimu rinoita se dielectric.Nokufamba kwenguva, iyi dielectric inoputsika, iyo voltage level mu shaft inowedzera, kusaenzana kwemazuva ano kunotsvaga nzira yekudzivirira kushoma kuburikidza nekutakura, iyo inokonzera kubereka ku arc, inowanzonzi EDM (Electrical Discharge Machining).Nokufamba kwenguva, uku kunogara kuripo kunoitika, nzvimbo dzepamusoro mumijaho inotakura dzinoita brittle, uye zvidimbu zvidiki zvesimbi mukati mekutakura zvinogona kutsemuka.Pakupedzisira, iyi yakakuvadzwa inofamba pakati pemabhora anotakura uye mijaho inotakura, ichigadzira abrasive mhedzisiro inogona kukonzera chando kana grooves (uye inogona kuwedzera ambient ruzha, vibration, uye tembiricha yemota).Sezvo mamiriro ezvinhu anowedzera, mamwe mamotor anogona kuramba achimhanya, uye zvichienderana nekuoma kwedambudziko, pakupedzisira kukuvadzwa kwemabheji emotokari kunogona kuva kusingadzivisiki nokuti kukanganisa kwakatoitwa.

zvichibva pakudzivirira

Nzira yekubvisa sei ikozvino kubva pakubereka?Mhinduro yakajairika ndeyekuwedzera shaft pasi kune imwe magumo emota shaft, kunyanya mumashandisirwo ayo akajairwa modhi voltages anogona kunge achiwanda.Shaft grounding inzira yekubatanidza rotor inotenderera yemotor kusvika pasi kuburikidza nemota furemu.Kuwedzera shaft pasi kumota (kana kutenga mota isati yaiswa) isati yaiswa inogona kunge iri mutengo mudiki kana uchienzaniswa nemitengo yekugadzirisa ine chekuita nekutakura kutsiva, tisingarevi mutengo wakakura wenzvimbo yekudzikira.

Mhando dzinoverengeka dzeshaft grounding gadziriro dzakajairika muindasitiri nhasi.Kuisa kabhoni brushes pamabhuraketi kuchiri kufarirwa.Aya akafanana neakajairwa DC kabhoni mabhurashi, ayo anopa kubatanidza magetsi pakati pezvinotenderera uye zvakamira zvikamu zvemota wedunhu..Rudzi rutsva rwechishandiso pamusika ndeye fiber brush ring mudziyo, zvishandiso izvi zvinoshanda nenzira yakafanana nekabhoni mabhurashi nekuisa akawanda tambo dze conductive fiber mumhete yakatenderedza shaft.Kunze kwerin'i kunoramba kwakamira uye kunowanzoiswa padivi pemota, ukuwo mabhurashi achikwira pamusoro pemoto shaft, achitsausa azvino nemumabhurashi uye achidzika zvakanaka.Nekudaro, kune mahombe mota (pamusoro pe100hp), zvisinei neshaft grounding mudziyo unoshandiswa, zvinowanzokurudzirwa kuisa insulated bearing kune imwe mugumo wemota panoisirwa shaft grounding mudziyo kuti uve nechokwadi chekuti ma voltages ese ari mu rotor ari. inobudiswa kuburikidza nemudziyo wepasi.

mukupedzisa

Variable frequency drives inogona kuchengetedza simba mumashandisirwo mazhinji, asi pasina kudzika kwakaringana, anogona kukonzera kutadza kwemota nguva isati yakwana.Pane zvinhu zvitatu zvekufunga nezvazvo paunenge uchiedza kudzikisa zvakajairika mode voltages mukusiyana frequency drive application: 1) Ita shuwa kuti mota (uye mota system) yakadzikwa zvakanaka.2) Sarudza iyo yakakodzera mutakuri frequency chiyero, iyo inoderedza ruzha uye kusaenzana kwevoltage.3) Kana shaft grounding ichionekwa sezvinodiwa, sarudza ivhu rinonyatsokodzera chikumbiro.