Ua ntej, txoj haujlwm ua haujlwm ntawm brushless DC lub cev
Kev txhuam ntawm DC lub cav tsis yog txhuam ntawm DC lub cev thiab tsav tsheb, txhuam tsis siv lub tshuab DC yog cov khoom siv hluav taws xob thiab hluav taws xob kev sib txuas. DC brushless lub cev stator windings ua ntawm peb symmetrical hnub qub kev twb kev txuas, nrog peb theem asynchronous brushless DC lub cev yog zoo heev. DC brushless tsav ntawm lub rotor nplaum magnetized mus tas li magnet, thiaj li pom lub polarity ntawm brushless DC motor, DC brushless tsav nrog ib txoj hauj lwm sensor. Tus tsav tsheb yog tsim los ntawm cov hluav taws xob hluav taws xob thiab cov kev sib xyaws ua ke. Qhov nws muaj nuj nqi yog los txais kev pib, nres thiab nres cov teeb liab ntawm lub tshuab tsis txhuam ntswj kom tswj tau pib, nres thiab braking ntawm DC brushless lub cev. Txais qhov teeb meem ntawm txoj hauj lwm thiab xa thiab thim teeb meem, siv los tswj tus choj inverter choj fais fab rau thiab tawm, uas ua rau lub nrawm qaum; Txais kev hais kom ceev thiab ceev cov lus teb, siv los tswj thiab kho qhov ceev; Muab kev tiv thaiv thiab kev pom, thiab lwm yam.
DC tsav nrog cov lus teb ceev ceev, pib lub voj voog, kom muaj pes tsawg ceev kom cov nqi nyob nrog cov kev taw qhia tau vib thiv tuaj yeem muab qhov kev ua tau zoo, tiam sis qhov zoo ntawm DC tsav kuj yog nws cov kev tsis txaus siab, vim tias DC tsav los tsim ib qhov kev thauj khoom tas li Ces armature magnetic teb thiab rotor magnetic teb yuav tsum tsis tu ncua kom muaj 90 °, uas yuav cia rau txhuam cov txhuam thiab khoom muag. Carbon txhuam thiab commutator nyob rau hauv lub cev ua kom lub cev yuav ua rau txim, toner ntxiv rau lub Cheebtsam yuav ua rau kev puas tsuaj, kev siv sijhawm tsis txaus. AC lub cev tsis muaj txhuam cov hlab pas thiab khoom muag, tsis muaj kev tiv thaiv, muaj zog, dav dav, tab sis cov yam ntxwv ntawm DC lub zog kom ua tiav qhov sib luag ntawm kev ua haujlwm ntawm cov cuab yeej tswj kom siv tau. Tam sim no qhov kev loj hlob sai ntawm cov khoom siv hluav taws xob hluav taws xob kom hloov tau qhov ntau zaus, txhawm rau txhim khu kev ua tiav ntawm kev tsav tsheb. Microprocessor ceev yog ceev thiab sai dua, tuaj yeem ua tiav AC motor tswj tso rau hauv ob txoj kab rov tav ob txoj kab sib txuas, AC-tsav tsheb khiav hauv ob lub ntswj tam sim no, kom zoo xws li DC tsav tswj thiab DC tsav nrog qhov sib npaug .
Thib ob, qhov txhuam tsis ua haujlwm DC
DC brushless lub cev yog lub cav sib txuas, uas txhais tau hais tias lub rotor speed ntawm stator stator rotation magnetic teb ceev thiab pes tsawg tus rotor (p): n = 60. F / p. DC brushless tsav nyob rau hauv lub rotor tus naj npawb ntawm cov chaw ruaj, hloov qhov zaus ntawm tus stator tig magnetic teb yuav hloov lub rotor ceev. DC brushless tsav yog lub tshuab synchronous nrog hluav taws xob tswj (tsav), tswj lub zaus ntawm tus stator rotating magnetic teb thiab lub tsav rotor ceev rov qab mus rau qhov chaw tswj kev rov kho dua, kom ua tiav ze ntawm DC lub zog yam ntxwv ntawm txoj kev. Qhov ntawd yog, DC brushless lub cev yuav nyob hauv cov kwv yees cov khoom thaum lub thauj hloov tseem tuaj yeem tswj tau lub rotor lub cev kom muaj kev ceev ceev.
DC brushless tsav, nrog rau fais fab mov thiab tswj: Ministry of fais fab kom muab peb theem phais kom lub cev muaj zog, pawg tswj xyuas yuav raug hloov raws li qhov xav tau ntawm cov tswv yim fais fab tuag. Lub zog fais fab yuav ua tau ncaj qha DC input (feem ntau 24v) lossis AC input (110v / 220v), yog lub tswv yim AC yuav tsum xub hloov ua ntej (converter) mus rau hauv DC. Xws li DC lub tswv yim los yog AC nkag mus rau lub cav qev ua ntej DC voltage los ntawm inverter (inverter) rau hauv peb theem siab kom tsav tsheb. Inverter (inverter) feem ntau muab faib rau qaum tes (q1, q3, q5) / qis sab caj npab (q2, q4, q6) 6 power transistors (q1 ~ q6) Kauj. Cov seem tswj cov mim (pulse dav tes taws los piav) los txiav txim lub zaus ntawm kev hloov zaus ntawm lub hwj chim transistor thiab qhov pib ntawm qhov inverter. DC brushless motors feem ntau xav siv thaum twg qhov kev hloov pauv nyob rau hauv kev ceev yuav ruaj khov ntawm tus nqi uas tsis tas hloov pauv ntawm kev tswj, li ntawd, brushless DC engine nruab nrog lub teb chaw magnetic kuj yuav rhiab nrog (sensor) Ua tus ceev ntawm lub Kaw kev tswj loop, tab sis kuj yog lub hauv paus rau theem tswj kev tswj. Tab sis qhov no tsuas yog siv raws li kev tswj ceev thiab tsis tuaj yeem siv ua ib qho chaw tswj.
