Intsingiselo ye-brushless DC motor

I-brushless DC motor inomgaqo ofanayo wokusebenza kunye neempawu zesicelo njengemoto ye-DC jikelele, kodwa ukwakheka kwayo kwahlukile.Ukongeza kwi-motor ngokwayo, yangaphambili inesekethe eyongezelelweyo yokutshintsha, kwaye i-motor ngokwayo kunye nesekethe yokutshintsha ihlanganiswe ngokusondeleyo.I-motor ngokwayo yeemoto ezininzi eziphantsi kwamandla adityanisiweyo kunye nesekethe yokutshintsha.Ukusuka kwinkangeleko, i-DC brushless motor iyafana ncam nemoto yeDC.

I-motor ngokwayo ye-brushless DC motor yinxalenye yokuguqula amandla e-electromechanical.Ukongeza kumacandelo amabini esixhobo sokuxhobisa kunye ne-excitation yemagnethi esisigxina, i-brushless DC motor nayo inezinzwa.Injini ngokwayo ingundoqo we-brushless DC motor.I-brushless DC motor ayihambelani kuphela kwizikhombisi zokusebenza, ingxolo kunye nokungcangcazela, ukuthembeka kunye nobomi benkonzo, kodwa ibandakanya iindleko zokuvelisa kunye neendleko zemveliso.Ngenxa yokusetyenziswa kwemagnethi esisigxina, i-brushless DC motor inokususa uyilo lwemveli kunye nesakhiwo semoto ye-DC jikelele, kwaye ihlangabezane neemfuno zeemarike ezahlukeneyo zesicelo.Uphuhliso lwemagnethi esisigxina yemagnethi inxulumene ngokusondeleyo nokusetyenziswa kwezixhobo ezisisigxina zemagnethi.Ukusetyenziswa kwezixhobo zemagnethi ezisisigxina zesizukulwana sesithathu kukhuthaza ii-motor ze-DC ezingenasibhrashi ukuba ziqhubele phambili ekusebenzeni okuphezulu, i-miniaturization kunye nokonga amandla.

Ukuze ufezekise ukutshintshwa kwe-elektroniki, i-brushless DC motor kufuneka ibe nomqondiso wendawo yokulawula isekethe.Kwiintsuku zangaphambili, i-electromechanical position sensor yayisetyenziselwa ukufumana umqondiso wendawo, kwaye ngoku i-electronic sensor sensor okanye indlela yayo ye-DC brushless motor isetyenziswa ngokuthe ngcembe ukufumana umqondiso wendawo.Eyona ndlela ilula kukusebenzisa isignali enokubakho ye-armature winding njengophawu lwendawo.I-brushless DC motor kufuneka ibe nomqondiso wesantya ukuqonda ulawulo lwesantya semoto.Umqondiso wesantya ufunyenwe ngendlela efanayo yokufumana uphawu lwendawo.I-sensor yesantya esilula yindibaniselwano ye-tachogenerator yokulinganisa i-frequency kunye ne-electronic circuit.Isekethe yokutshintsha yemoto ye-brushless DC iqukethe iinxalenye ezimbini, indawo yokuqhuba kunye nenxalenye yolawulo.Amacandelo amabini akulula ukuwahlula.Ngokukodwa kwiisekethe zamandla aphantsi, amacandelo amabini ahlala edityaniswe kwi-application-specific integrated circuit.

Kwi-brushless DC motor, i-drive circuit kunye nesiphaluka solawulo sinokudibaniswa kwenye yeenjini ezinamandla aphezulu.Isekethe yokuqhuba ivelisa amandla ombane, iqhuba i-armature winding ye-motor, kwaye ilawulwa yisekethe yokulawula.Okwangoku, isekethe ye-DC brushless motor drive iye yatshintshwa ukusuka kwimo yokukhulisa umgca ukuya kwi-pulse wide modulation switching state, kwaye ukubunjwa kwesekethe ehambelana nayo kuye kwaguqulwa ukusuka kwisekethe ye-transistor discrete ukuya kwisekethe edibeneyo yemodyuli.Iimodyuli ezidityanisiweyo zeesekethe zenziwe ngamandla e-bipolar transistors, i-transistors yempembelelo yentsimi yamandla kunye nesango elilodwa lesango lesiphumo se-bipolar transistors.Nangona isango lokwahlula isango le-bipolar transistor libiza kakhulu, kufanelekile ukukhetha i-DC brushless motor ngokwembono yokuthembeka, ukhuseleko kunye nokusebenza.