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Mayankho a malo a brushless DC motor

Kuyambira kubadwa kwa brushless DC galimoto, Sensa ya Hall effect yakhala mphamvu yaikulu yozindikira mayankho oyendayenda.Popeza kulamulira kwa magawo atatu kumafuna masensa atatu okha ndipo kumakhala ndi mtengo wochepa wa unit, nthawi zambiri zimakhala zosankha zachuma kwambiri kuti zisinthe kuchoka ku mtengo wa BOM wokha.Masensa a Hall effect ophatikizidwa mu stator amazindikira malo a rotor kotero kuti ma transistors mu mlatho wa magawo atatu akhoza kusinthidwa kuyendetsa galimoto. masensa zotsatira angathe kuthetsa vuto la BLDC galimoto commutation, iwo okha kukwaniritsa theka la zofunika dongosolo BLDC.

Ngakhale sensa ya Hall effect imathandizira wowongolera kuyendetsa galimoto ya BLDC, kuwongolera kwake mwatsoka kumangokhala kuthamanga ndi mayendedwe.Mu injini ya magawo atatu, sensa ya Hall effect imangopereka malo aang'ono mkati mwa njira iliyonse yamagetsi.Pamene chiwerengero cha ma poli awiri chikuwonjezeka, momwemonso kuchuluka kwa magetsi pa makina ozungulira, komanso kugwiritsa ntchito BLDCs kufalikira. , momwemonso kufunikira kwa chidziwitso chodziwika bwino cha malo.Kuonetsetsa kuti njira yothetsera vutoli ndi yolimba komanso yokwanira, dongosolo la BLDC liyenera kupereka chidziwitso cha nthawi yeniyeni kuti wolamulira asamangoyang'ana liwiro ndi njira, komanso mtunda woyenda ndi malo aang'ono.
Kuti mukwaniritse zofunikira zambiri za malo okhwima, njira yothetsera vutoli ndikuwonjezera chowonjezera chozungulira chozungulira ku galimoto ya BLDC. Kawirikawiri, ma encoder owonjezera amawonjezedwa ku dongosolo lofanana loyang'anira lopu yowonjezera kuwonjezera pa Hall effect sensor.Hall effect sensors ndi amagwiritsidwa ntchito potembenuza magalimoto, pamene encoders amagwiritsidwa ntchito potsata ndondomeko yolondola ya malo, kuzungulira, liwiro ndi njira. Bipolar motors, pali zigawo zisanu ndi chimodzi zokha pa makina ozungulira.Kufunika kwa zonsezi ndi zoonekeratu poyerekeza ndi encoder yowonjezereka yomwe imapereka chigamulo mu zikwi za PPR (pulses per revolution), yomwe imatha kusinthidwa kukhala kanayi chiwerengero cha kusintha kwa boma.
Komabe, popeza opanga ma motor pakali pano akuyenera kusonkhanitsa masensa onse a Hall effect ndi ma encoder owonjezera mu injini zawo, opanga ma encoder ambiri ayamba kupereka ma encoder owonjezera okhala ndi zotuluka, zomwe timakonda kuzitcha ngati ma encoder oyenda. perekani osati njira zachikhalidwe za A ndi B zokha (ndipo nthawi zina "kamodzi potembenuka" index pulse channel Z), komanso zizindikiro zoyendera za U, V, ndi W zomwe zimafunidwa ndi madalaivala ambiri a BLDC. Izi zimapulumutsa galimoto pangani gawo losafunikira pakuyika zonse za Hall effect sensor ndi encoder yowonjezereka nthawi imodzi.
Ngakhale ubwino wa njirayi ndi wodziwikiratu, pali kusintha kwakukulu. Monga tafotokozera pamwambapa, malo a rotor ndi stator ayenera kukhala odziwa bwino. BLDC brushless mota kuti zisinthidwe bwino.Izi zikutanthauza kuti chisamaliro chiyenera kuchitidwa kuti muwonetsetse kuti njira za U / V / W za encoder ya commutator zimagwirizana bwino ndi gawo la galimoto ya BLDC.