BLOG

Maikutlo a boemo bakeng sa brushless DC motor

Ho tloha tsoalong ea brushless DC motor, Sensor ea phello ea Hall e bile matla a ka sehloohong a ho lemoha maikutlo a phalliso. Kaha taolo ea mekhahlelo e meraro e hloka li-sensor tse tharo feela 'me e na le litšenyehelo tse tlaase tsa yuniti, hangata ke khetho ea moruo ka ho fetisisa bakeng sa ho khutlela morao ho tloha ponong ea litšenyehelo tsa BOM feela.Li-sensor tsa holo tse kentsoeng ka har'a stator li lemoha boemo ba rotor e le hore li-transistors tse borokhong ba mekhahlelo e meraro li ka fetoloa ho khanna koloi.The three Hall effect sensor outputs are generally labeled as U, V, and W. li-sensor tsa phello li ka rarolla bothata ba BLDC motor commutation, li fihlela halofo feela ea litlhoko tsa sistimi ea BLDC.

Le hoja sensor ea Hall effect e nolofalletsa molaoli ho khanna koloi ea BLDC, ka bomalimabe taolo ea eona e lekanyelitsoe ho lebelo le tataiso.Ka motlakase oa mekhahlelo e meraro, sensor ea Hall effect e ka fana ka boemo ba angular feela ka har'a potoloho e 'ngoe le e' ngoe ea motlakase. , ho joalo le ka tlhokahalo ea ho lemoha boemo bo nepahetseng.Ho etsa bonnete ba hore tharollo e matla ebile e phethehile, tsamaiso ea BLDC e lokela ho fana ka tlhahisoleseding ea boemo ba nako ea sebele e le hore molaoli a se ke a latela feela lebelo le tataiso, empa hape le sebaka sa maeto le sebaka sa angular.
Ho finyella tlhokahalo ea boitsebiso bo eketsehileng ba boemo bo thata, tharollo e tloaelehileng ke ho eketsa encoder ea rotary e ntseng e eketseha ho koloi ea BLDC. Ka tloaelo, li-encoder tse ntseng li eketseha li kenngoa tsamaisong e tšoanang ea taolo ea loop ho phaella ho Hall effect sensor. e sebelisoang bakeng sa ho khutlisa koloi, ha li-encoder li sebelisoa bakeng sa ho latedisa maemo, ho potoloha, lebelo le tsela e nepahetseng.Kaha sensara ya Hall effect e fana feela ka tlhahisoleseding e ntjha ya boemo phetohong e nngwe le e nngwe ya mmuso wa Holo, ho nepahala ha yona ho fihla ho tse tsheletseng feela bakeng sa potoloho e nngwe le e nngwe ya matla. Bipolar motors, ho na le linaha tse tšeletseng feela ka potoloho ea mochini. Tlhokahalo ea bobeli e hlakile ha e bapisoa le encoder e ntseng e eketseha e fanang ka tharollo ho likete tsa PPR (pulses per revolution), e ka khetholloang ka makhetlo a mane palo ea liphetoho tsa naha.
Leha ho le joalo, kaha baetsi ba makoloi hajoale ba tlameha ho kopanya li-sensor tsa Hall effect le li-encoder tse ntseng li eketseha ka har'a lienjine tsa bona, bahlahisi ba bangata ba li-encoder ba se ba qala ho fana ka li-encoder tse ntseng li eketseha tse nang le liphetho tse tsamaeang, tseo hangata re li bitsang feela joalo ka li-encoder tse tsamaeang. u fane feela ka likanale tsa setso tsa orthogonal A le B ('me maemong a mang "han per turn" index pulse channel Z), empa hape le matšoao a tloaelehileng a U, V, le W a hlokoang ke bakhanni ba bangata ba likoloi tsa BLDC. Sena se boloka motlakase. theha mohato o sa hlokahaleng oa ho kenya sensor ea Hall effect le encoder e ntseng e eketseha ka nako e le 'ngoe.
Le hoja melemo ea mokhoa ona e totobetse, ho na le mekhoa e mengata ea khoebo. Joalokaha ho boletsoe ka holimo, boemo ba rotor le stator bo tlameha ho ba hantle bakeng sa BLDC brushless motor ho tsamaisoa ka katleho.Sena se bolela hore ho lokela ho hlokomelwa ho netefatsa hore dikanale tsa U/V/W tsa encoder ya commutator di tsamaisana ka nepo le mokgahlelo wa enjene ya BLDC.