Lub Brushless DC Tsav ua haujlwm li cas

Brushless DC motors muaj qhov tshwj xeeb rov qab emf waveform uas coj zoo li lub cev muaj zog DC (BDC). Raws li Lorentz txoj cai lij choj ntawm kev quab yuam, ib qho quab yuam yog tsim thaum cov hlau conductive muab tso rau hauv ib qho chaw sib nqus. Raws li qhov tshwm sim ntawm cov tshuaj tiv thaiv quab yuam, cov hlau nplaum kuj muaj kev tawm tsam rog. Hauv brushless DC motors, cov xaim nqa tam sim no nyob ruaj khov thaum cov hlau nplaum mus tas li. Thaum lub stator winding yog energized los ntawm lub hwj chim qhov chaw, nws ua ib tug electromagnet thiab pib tsim ib tug uniform magnetic teb nyob rau hauv cov huab cua sib txawv. Lub zog hluav taws xob yog DC, tab sis qhov hloov pauv ua rau lub voj voog trapezoidal AC. Kev sib cuam tshuam ntawm electromagnetic stator thiab cov hlau nplaum ruaj khov rotor ua kom lub rotor spinning. Raws li cov coils hloov pauv ntawm qhov siab thiab qis qis, cov coils sib txuas tau muaj zog zoo li cov ncej qaum teb thiab sab qab teb. Cov hlau nplaum ruaj khov rotor nrog rau sab qaum teb thiab sab qab teb ncej yog ua raws li cov stator ncej thiab lub cev muaj zog khiav.

BLDC motors tsis tuaj yeem ua haujlwm ncaj qha los ntawm DC voltage qhov chaw. Rotors nrog cov hlau nplaum tas mus li thiab cov kab mob stators thiab cov khoom siv hluav taws xob muaj nyob. Feem ntau, peb Hall sensors yog siv los ntes thiab hloov txoj haujlwm rotor raws li cov tswv yim los ntawm Hall sensors. Lub cev muaj zog yog tswj los ntawm lub square lossis trapezoidal voltage viav vias thiab ib qho chaw rotor tshwj xeeb. Yuav kom ua tiav qhov siab tshaj plaws torque, lub viav vias voltage yuav tsum tau ua kom zoo ntawm cov theem kom lub kaum sab xis ntawm lub stator thiab rotor fluxes ze rau 90 degree.