Structure Ntawm DC Tsav
Dec 17, 2025
Kev tswj cov qauv ntawm lub cev tsis muaj zog DC: Ib lub cev tsis muaj zog DC yog ib hom synchronous lub cev muaj zog, txhais tau tias nws cov rotor ceev cuam tshuam los ntawm qhov ceev ntawm stator lub rotating magnetic teb thiab tus naj npawb ntawm rotor ncej (P), N=120f / P. Nrog rau tus naj npawb ntawm cov rotor ncej, hloov qhov zaus ntawm stator lub rotating magnetic teb hloov lub rotor ceev. Lub cev muaj zog DC brushless yog qhov tseem ceeb ntawm lub cev muaj zog synchronous nrog ntxiv hluav taws xob tswj (tsav tsheb). Nws tswj cov zaus ntawm stator lub rotating magnetic teb thiab pub lub rotor ceev rov qab mus rau lub chaw tswj kom rov kho, aiming kom ua tiav cov yam ntxwv ze rau DC lub cev muaj zog. Hauv lwm lo lus, lub cev tsis muaj DC lub cev muaj zog tuaj yeem tswj tau qee qhov rotor ceev hauv nws qhov ntsuas qhov ntsuas txawm tias thaum hloov pauv.
Ib tus tsav tsheb tsis muaj DC muaj xws li cov khoom siv hluav taws xob thiab ntu tswj hwm: ntu fais fab mov muab peb -theem fais fab rau lub cev muaj zog, thaum seem tswj hloov lub zog input zaus raws li xav tau. Cov khoom siv hluav taws xob tuaj yeem lees txais ncaj qha DC input (feem ntau 24V) lossis AC input (110V / 220V). Yog tias cov tswv yim yog AC, nws yuav tsum xub hloov mus rau DC los ntawm lub converter. Txawm hais tias lub tswv yim yog DC los yog AC, DC voltage yuav tsum xub hloov mus rau hauv peb-theem voltage los ntawm inverter los tsav lub cav coils. Lub inverter feem ntau muaj rau lub hwj chim transistors (Q1-Q6) muab faib rau sab caj npab (Q1, Q3, Q5) thiab sab caj npab (Q2, Q4, Q6), txuas nrog lub cev muaj zog raws li cov keyboards los tswj cov hluav taws xob ntws los ntawm lub cev muaj zog coils. Lub tsev tswj hwm muab PWM (Pulse Width Modulation) los txiav txim siab qhov hloov zaus ntawm lub hwj chim transistors thiab lub sij hawm ntawm inverter commutation. Brushless DC motors feem ntau xav tau kev tswj ceev uas ua kom qhov ceev tseem ruaj khov ntawm tus nqi teeb tsa yam tsis muaj qhov hloov pauv loj thaum lub thauj khoom hloov. Yog li ntawd, lub cev muaj zog yog nruab nrog Hall sensor uas hnov qhov sib nqus teb, ua haujlwm kaw-voj ceev tswj thiab tseem yog lub hauv paus rau theem kev tswj hwm theem. Txawm li cas los xij, qhov no tsuas yog siv rau kev tswj ceev thiab tsis tuaj yeem siv rau kev tswj qhov chaw.
