Brushless DC (BLDC) motors tseem hu ua commutatorless DC motors, electronically commutated motors, AC synchronous motors lossis DC servo motors. Lawv tab tom hloov cov brushed DC motors vim lawv cov kev ua haujlwm siab, lub neej ntev, tus me nyuam lub zog thiab kev ua haujlwm siab. Lawv daim ntawv thov tau raug txwv nyob rau yav dhau los vim yog tus nqi ntxiv ntawm cov tswj lub cev muaj zog yuav tsum tau ua haujlwm rau cov motors. Tus nqi tswj tau nyob rau hauv qhov kev poob qis hauv xyoo tas los no, yog li kev siv brushless DC motors tau nce thiab xav tias yuav loj hlob. Txawm hais tias ntse siv nyob rau hauv lub tsheb, HVAC, electronics, computer, semiconductor thiab kev kho mob industries, BLDC motors tau ntev tau siv nyob rau hauv industrial siv xws li actuators, pub drives rau CNC tshuab, industrial robots, extruder drives, thiab lwm yam.
Txawm hais tias yuav tsum muaj kev tswj hwm lub cev muaj zog, cov qauv yooj yim ntawm BLDC lub cev muaj zog muab qee qhov txiaj ntsig zoo uas BLDC lub cev muaj zog tsis tuaj yeem muab tau raws li kev siv hluav taws xob tsawg, siab torque thiab ntau yam ceev ceev. BLDC motors siv ib qho kev teeb tsa sab hauv. Lub rotor muaj ib tug series ntawm cov hlau nplaum ruaj khov thiab ib qho ruaj khov armature. Lub rotor yog zoo siab los ntawm ib qho hluav taws xob kev sib hloov tswj. Piv nrog cov brushed DC motors, BLDC motors muaj cua sov dissipation zoo dua thiab ua haujlwm zoo dua thiab muaj zog dua.
Vim tsis muaj cov txhuam hniav thiab cov neeg kho tshuab commutator, nws qhov loj me, txo qhov hnyav thiab kev kub ceev ntau yam, txhawm rau muab cov lus qhia txoj haujlwm xav tau rau kev siv servo, BLDC motors muaj encoder (optical lossis Hall effect), siv los ntsuas qhov txoj hauj lwm ntawm rotor. Cov lus qhia tawm tswv yim tsim los ntawm tus encoder yog siv los ntawm tus tswj lub cev muaj zog los tsim cov teeb liab tawm tswv yim los ua kom lub zog ntawm lub cev tam sim no thiab hluav taws xob hloov mus rau nws kom lub armature lub magnetic teb rotates synchronously nrog lub rotor. Qhov zoo ntawm BLDC motors muaj xws li:
Lub neej ua haujlwm ntev dua vim tsis muaj hluav taws xob thiab kev sib txhuam poob. Vim tsis muaj cov txhuam hniav thiab cov khoom siv hluav taws xob, nws tsis muaj kev saib xyuas zoo. EMI thiab suab nrov raug txo vim kev tshem tawm ntawm ionization spikes tsim los ntawm cov txhuam hniav.
Txij li thaum lawv tuaj yeem raug kaw tag nrho, lawv tsim nyog siv rau hauv qhov chaw muaj kev phom sij (pob zeb, roj, roj thiab lwm yam khoom txawv teb chaws). Cov yam ntxwv ua haujlwm muaj xws li:
(1) Kev kub ceev, kev taw qhia luv luv;
(2) hnyav load, siab torque tswj;
(3) Lub luag haujlwm luv luv lub voj voog kev txav chaw;
(4) High acceleration / deceleration muaj peev xwm.
