Njira yowongolera mota ya DC yopanda brushless ndi njira yowongolera liwiro

Galimoto yopanda burashi ya DcKapangidwe kake ndi koyenera, liwiro lake ndi lokhazikika, kotero nthawi zambiri, nthawi zambiri silimayendetsedwa bwino kwambiri. Chifukwa chakuti mota ili ndi ntchito zambiri ndipo ingagwiritsidwe ntchito ndi makina ambiri, ndikofunikira kusintha liwiro lake malinga ndi nthawi zosiyanasiyana. Koma njira yowongolera ndi kulamulira liwiro la mota ya DC yopanda burashi imafuna kuti aliyense aphunzire, kuti igwiritsidwe ntchito mwachangu:

1. Powongolera dongosolo lomwe coil imapatsidwa mphamvu, coil yotsutsana imagawidwa m'gulu ndipo mphamvu yamagetsi imapatsidwa mphamvu kuti ipange mphamvu ya maginito mbali yomweyo.

2. Chiwerengero cha zipilala za mota ya DC yopanda brushless ndi zitatu, kotero kuti zipilala ziwiri zilizonse za "zipilala zamaginito" zitha kuyendetsedwa m'dongosolo linalake kuti zikwaniritse zotsatira za kuzungulira kwa mphamvu yamaginito. Pogwiritsa ntchito mphamvu yamaginito, chozungulira cha maginito okhazikika pakati nthawi zonse chimakhala ndi chizolowezi chosunga mphamvu yamaginito mbali imodzi ndipo chidzazungulira ndi mphamvu yamaginito yozungulira.

H1H2H3 ndi masensa atatu a Hall omwe amaikidwa mu mpweya wa coil yosonkhezera, yomwe imagwiritsidwa ntchito ngati chinthu chozindikira mphamvu ya maginito. Mphamvu yamagetsi imatha kusinthidwa malinga ndi momwe mphamvu ya maginito imayendera, ndipo zotsatira zake ndi chizindikiro cha digito.

3. Chozungulira cha stator chimapatsidwa mphamvu malinga ndi ndondomeko yotsatira, ndipo mphamvu ya maginito ya rotor ndi mphamvu ya maginito ya stator ziyenera kukhala ndi Ngodya. Palibe chifukwa choweruza ngati mota ya dc yopanda brushless yangoyatsidwa kumene, ingofunika kuchita lamulo lotsatira malinga ndi momwe ntchitoyo imagwirira ntchito yotumizidwa ndi sensa ya Hall.

Lamulo lake ndi kutumiza ma coil atatu awiriawiri ndi awiri, ma switch awa amapangidwa kudzera mu transistor.

Kuzungulira kwa BLDC ya magawo atatu kumatha kuchitika mwa kupereka mphamvu kapena kudula ma transistors atatu m'dongosolo linalake.

4. Pamene rotor ikuzungulira, mphamvu yochokera ku coil iliyonse imachoka pamwamba kwambiri kupita ku zero ndikubwerera kachiwiri. Chifukwa coil ikapatsidwa mphamvu kumbali ina, mphamvu ya electromotive yobwerera idzatseka voltage yobwerera, kotero gawo la trapezoidal wave lidzawonekera. Voltage yabwino ndi yoipa ya gawo la trapezoidal la zero ndi yosiyana, kotero momwe ntchito ya stator ya mota ingadziwikire pozindikira voltage yabwino ndi yoipa pambuyo pa comparator ya voltage.

Popeza mfundo ya zero ili pakati pa trapezoid, kuzungulira kwa BLDC kumatha kuyendetsedwa pambuyo poti chizindikiro chowongolera cha nthawi yofananira chatulutsidwa pambuyo pa kuchedwa kwa 30°. Njira yowongolera iyi sifunikira sensa ya Hall, ndipo mawaya atatu amatha kuyendetsaBLDCNgati mawonekedwe a mafunde ndi abwino kwambiri, ma curve atatu a coil voltage angapezeke mwa kuphatikiza mwachindunji magetsi. Chifukwa chake mota ya dc yopanda brushless ikhoza kuyendetsedwa.

5. Dziwani komwe mumayambira, yambani ndi mphamvu ya coil yapansi kumbali imeneyo, yambitsani rotor kupita komwe mumayambira pakapita nthawi yochepa, ndikuyatsa injiniyo motsatira ndondomeko yotsatirayi.

Kuti tiwongolere kugwiritsa ntchito bwino kwa mota ya brushless dc, tifunika kuphunzira malinga ndi malo osiyanasiyana ogwiritsira ntchito, kuwongolera kosiyanasiyana ndi malamulo a liwiro, kukonza magwiridwe antchito a mota, njira yowongolera ndi malamulo a liwiro ingagwiritsidwe ntchito kusintha liwiro.