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Position mhinduro kune brushless DC mota

Kubva pakuzvarwa kwa brushless DC mota, Hall effect sensor ndiyo yave iri simba guru rekuona mhinduro yekuchinja.Sezvo kutonga kwezvikamu zvitatu kunoda masensa matatu chete uye ane mari shoma yeyuniti, ivo vanowanzove vakanyanya hupfumi sarudzo yekudzokera shure kubva kune zvakangoita BOM mari yekuona.Hall effect sensors dzakaiswa mu stator inoona nzvimbo ye rotor kuitira kuti transistors mutatu-phase bridge inogona kuchinjwa kuti ityaire motokari.Itatu Hall effect sensor outputs inowanzonyorwa seU, V, uye W channels.Kunyangwe Hall. ma sensor sensors anogona kunyatsogadzirisa dambudziko reBLDC mota commutation, anongosangana nehafu yezvinodiwa zveBLDC system.

Kunyangwe iyo Hall effect sensor inogonesa mutongi kutyaira iyo BLDC mota, kutonga kwayo zvinosuruvarisa kunogumira pakumhanya uye kutungamira.Mune matatu-phase motor, iyo Hall effect sensor inogona kungopa nzvimbo yeangular mukati mega rega remagetsi.Sezvo huwandu hwemapole pairs hunowedzera, saka huwandu hwemagetsi emagetsi pakutenderera kwemagetsi, uye sezvo kushandiswa kweBLDC kunowedzera kupararira. , saka zvinoda kunyatsoona nzvimbo.Kuona kuti mhinduro yacho yakasimba uye yakakwana, hurongwa hweBLDC hunofanira kupa ruzivo rwechinzvimbo chechokwadi kuitira kuti mutongi anogona kutevera kwete kungokurumidza uye nzira, asiwo rwendo rwekufamba uye nzvimbo yeangular.
Kuti zvizadzise kudiwa kweruzivo rwekuomesesa kwenzvimbo, mhinduro yakajairika ndeyekuwedzera incremental rotary encoder kune BLDC mota.Kazhinji, incremental encoders inowedzerwa kune imwechete control feedback loop system kuwedzera kune Hall effect sensor.Hall effect sensors iri inoshandiswa pakugadzirisa motokari, nepo ma encoders anoshandiswa pakutsvaga kwakanyatsojeka kwechinzvimbo, kutenderera, kukurumidza uye nzira.Sezvo Hall effect sensor inongopa ruzivo rutsva rwechinzvimbo pane imwe neimwe yeHall state shanduko, kururama kwayo kunongosvika zvitanhatu chete kune imwe neimwe yemagetsi. bipolar motors, kune matunhu matanhatu chete pa mechanical cycle.Kudiwa kwezvose zviri pachena kana zvichienzaniswa neincremental encoder inopa kugadziriswa muzviuru zvePPR (pulses per revolution), iyo inogona kudhindwa kuita kana nhamba yekuchinja kwenyika.
Nekudaro, sezvo vagadziri vemota parizvino vachifanirwa kuunganidza ese ari maviri eHall effect sensors uye encoder ekuwedzera mumamotor avo, vagadziri vazhinji ve encoder vari kutanga kupa encoder ekuwedzera ane zvinobuda zvinobuda, izvo zvatinowanzo kudaidza sekungofamba encoder. Aya encoder akagadzirwa zvakanyanya kuti Kupa kwete chete echinyakare orthogonal A uye B chiteshi (uye mune dzimwe nguva iyo "kamwe pakutendeuka" index pulse channel Z), asiwo yakajairwa U, V, uye W commutation masiginecha anodiwa nevazhinji vatyairi veBLDC. Izvi zvinoponesa mota. gadzira nhanho isingakodzeri yekuisa ese ari maviri Hall effect sensor uye incremental encoder panguva imwe chete.
Kunyange zvazvo zvakanakira nzira iyi zviri pachena, pane zvakakosha kutengeserana-offs.Sezvakataurwa pamusoro apa, nzvimbo ye rotor uye stator inofanira kuva nyanzvi kune BLDC brushless mota kuti ifambiswe zvakanaka.Izvi zvinoreva kuti kutarisirwa kunofanira kutorwa kuve nechokwadi chekuti nzira dzeU/V/W dzekodha yekombuta dzakanyatsoenderana nechikamu chemota yeBLDC.