Brushless DC lub cev muaj zog yog kev siv cov khoom siv hluav taws xob hloov hluav taws xob kom ua tiav hluav taws xob thim rov qab, uas yog, kev siv hluav taws xob hloov khoom siv los hloov cov kev sib txuas lus ib txwm siv thiab txhuam. Cov qauv siv hluav taws xob muaj qhov zoo ntawm kev ntseeg siab, tsis muaj kev sib txuas lus thiab tsis tshua muaj suab nrov, thiab tau siv dav hauv cov ntaub ntawv qib siab, VCR, cov cuab yeej hluav taws xob thiab cov khoom siv hauv chaw ua haujlwm automation.
Brushless DC lub cev muaj zog muaj cov hlau nplaum ruaj khov rotor, multipole winding stator thiab txoj hauj lwm sensor. Txoj hauj lwm sensor Raws li rotor txoj hauj lwm hloov, tam sim no ntawm lub stator windings yog hloov nyob rau hauv ib tug tej yam kev txiav txim (uas yog, txoj hauj lwm ntawm lub rotor ncej txheeb ze rau stator winding yog kuaj, thiab txoj hauj lwm sensor teeb liab yog generated ntawm qhov chaw ntawm lub rotor ncej. txoj hauj lwm, lub hwj chim hloov hluav taws xob yog tswj los ntawm lub teeb liab hloov hluav taws xob, thiab winding tam sim no hloov raws li qee qhov kev sib raug zoo). Kev khiav hauj lwm voltage ntawm stator windings yog muab los ntawm hluav taws xob hloov hluav taws xob tswj los ntawm txoj hauj lwm sensor tso zis.
Txoj hauj lwm sensor muaj magnetic-sensitive, photoelectric thiab electromagnetic hom peb hom. Lub brushless DC lub cev muaj zog nrog lub sib nqus-rhiab qhov chaw sensor, thiab nws cov khoom sib nqus sensor (xws li cov khoom siv, sib nqus-sensitive diode, sib nqus-rhiab electrode, sib nqus-rhiab resistor lossis tshwj xeeb kev sib txuas hauv Circuit Court) tau teeb tsa rau ntawm stator sib dhos kom pom. magnetic teb hloov nyob rau hauv kev sib hloov ntawm cov hlau nplaum ruaj khov thiab rotor.
Siv photoelectric txoj hauj lwm sensor Brushless DC lub cev muaj zog, ntawm lub stator Cheebtsam nyob rau hauv ib tug tej yam txoj hauj lwm rau configure lub photoelectric sensor Cheebtsam, lub rotor yog haum nrog ib tug matte, lub teeb qhov chaw rau lub teeb-emitting diodes los yog me me qhov muag teev. Thaum lub rotor rotates, cov photosensitive Cheebtsam ntawm lub stator yuav muab intermittent pulses nyob rau hauv ib tug tej zaus vim qhov kev txiav txim ntawm lub shading phaj.