Cov Khoom Siv Hluav Taws Xob Hloov pauv Siv LM317 (PCB Layout): 3 Cov Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:25

Nyob zoo cov menyuam !!

Ntawm no kuv tab tom qhia koj cov txheej txheem PCB ntawm qhov hloov pauv hluav taws xob. Nov yog qhov kev sib tham nrov uas tau npaj muaj nyob hauv lub vev xaib.it siv qhov ntsuas hluav taws xob nrov IC LM317. Rau cov neeg uas xav paub txog hluav taws xob, lub voj voog no muaj txiaj ntsig zoo. Qhov xav tau yooj yim ntawm DIY tus nyiam ua haujlwm yog lub zog hloov pauv. Hloov chaw ntawm kev yuav cov khoom siv hluav taws xob raug nqi ntau heev, cov Circuit no yuav pab lawv tsim lub zog siv hluav taws xob uas tuaj yeem tswj qhov hluav taws xob thiab tam sim no ntawm nws tus kheej.

Khoom siv

1. LM317 Voltage Regulator
2. Transistor - MJE3055
3. Ceramic capacitors- 0.1uf 2nos, 0.2uf 1nos
4. Resistors-220ohm, 1K /0.25W, 0.1ohm /5W
5. Potentiometer - 5K, 10K
6. LED- 5 hli

Kauj Ruam 1: Daim duab Circuit Court

Kev ua haujlwm ntawm Circuit Court raws li kuv paub tau piav qhia ntawm no. Qhov ntsuas hluav taws xob IC LM317 tau siv los kho qhov hluav taws xob tso tawm. Kev tiv thaiv R1 & R2 tsim hluav taws xob faib hluav taws xob thiab nws txuas nrog rau tus pin hloov ntawm IC. Los ntawm kev sib txawv potentiometer R2 cov zis hluav taws xob tuaj yeem sib txawv. Tom ntej no los lub hwj chim transistor Q1 (MJE3055), txij li qhov siab tshaj plaws tam sim no uas tuaj yeem dhau los ntawm LM317 tau txwv rau 1.5A qhov transistor no tau siv los ua kom muaj peev xwm tam sim no ntawm lub zog siv. Qhov siab tshaj plaws tam sim no ntawm Q1 yog 10A.if yog tias koj xav nce lub peev xwm tam sim no tom qab ntawd tso cov transistors ua ke rau Q1. Thaum tso cov transistors sib txuas txuas qhov sib npaug tiv taus hauv koob nrog cov emitter. Ntawm no kuv tau txuas nrog tsuas yog ib lub transistor thiab 0.1ohm tsis kam hauv koob txij li thaum kuv tsuas muaj qhov ntawd nrog kuv.

Txhawm rau tswj cov zis tam sim no uas yog tus khaws khoom tam sim no ntawm Q1, lub hauv paus txuas nrog los ntawm tus xa tawm ntawm transistor Q2 (BD139). Lub hauv paus ntawm Q2 yog tswj los ntawm qhov hluav taws xob faib hluav taws xob ua los ntawm potentiometer R3.

Qee cov disc capacitors tau txuas nrog ua ke, cov no yog rau qee lub hom phiaj lim dej. LED txuas nrog ua ke kom pom lub zog.

Koj tseem tuaj yeem siv LM338 hloov LM317 uas tseem yog qhov ntsuas hluav taws xob sib txawv uas muaj peev xwm ntau dua tam sim no.

NCO TSEG: Tsis txhob txuas lub tshuab hluav taws xob hluav taws xob ntawm sab tso tawm. Qhov no yuav tsim qhov hloov pauv qeeb heev ntawm cov zis hluav taws xob.

Kev siv ntsuas qhov ntsuas

Yog tias cov zis tam sim no lossis lub zog tso tawm hauv cov transistors tso tawm ntau dua li ib nrab ntawm lawv qhov kev ntsuas siab tshaj plaws, yuav tsum txiav txim siab cov transistors sib luag. Yog tias siv cov transistors sib npaug, ntsuas cov ntsuas hluav taws xob yuav tsum tau teeb tsa hauv cov emitter ntawm txhua qhov sib txuas ua ke transistor.

Tus nqi tau txiav txim siab los ntawm kev kwv yees qhov sib txawv ntawm Vbe nruab nrab ntawm cov transistors thiab muaj tus nqi ntawd, lossis me ntsis ntxiv qhov hluav taws xob, poob thoob plaws txhua qhov tiv thaiv ntawm qhov siab tshaj tawm tam sim no. Qhov ntsuas qhov ntsuas tau xaiv los ua kom muaj qhov sib txawv ntawm Vbe vim yog hloov pauv transistor, tsim khoom lossis ntsuas kub, thiab lwm yam. Qhov sib txawv voltage feem ntau tsawg dua 100 mV lossis li ntawd. Qhov tseem ceeb ntawm 0.01 Ω txog 0.1 Ω feem ntau siv los muab qhov poob ntawm 50 txog 75 mV. Lawv yuav tsum muaj peev xwm tswj hwm qhov tam sim no thiab lub zog tawm mus.

Piv txwv, yog tias 30A yog tag nrho cov zis tam sim no thiab yog tias peb siv 3 transistors ces tam sim no los ntawm txhua lub transistor yuav tsum yog 10A (30/3 = 10A). Yog li kom ua tiav qhov ntawd, ntsuas cov neeg tawm tsam yuav tsum txuas nrog.

Let∆Vbe = 0.1v ces Rb = 0.1/10 = 0.01ohm

Lub zog ntsuas = 10*10*0.01 = 1W

Kauj Ruam 2: PCB Txheej Txheem

Cov ntawv pdf ntawm PCB txheej txheem tau muab ntawm no. Koj tuaj yeem rub nws los ntawm no.

Dimension ntawm PCB = 44.45x48.26mm.

Koj tuaj yeem pom txheej tooj liab sab saum toj hauv PCB (Liab) Tab sis kuv tau muab koj nrog ib txheej txheej PCB txheej nrog koj. Yog li koj tuaj yeem siv lub jumper xaim txuas ob lub vias.

Kauj Ruam 3: Tiav Board

Tom qab kos cov PCB tso cov khoom ua tib zoo thiab muab nws tso rau. Ob lub potentiometers txuas nrog lub rooj tsavxwm los ntawm cov xov hlau. Kuv tau siv lub jumper txuas ob lub vias los ntawm sab saum toj ntawm pawg thawj coj saib.

Txhawm rau tshem tawm cov cua sov tsim los ntawm MJE3055 thiab LM317 siv lub dab dej kub kom haum.

Kuv tau sim qhov Circuit no nrog cov khoom siv nkag 16V /5A thiab kuv tuaj yeem hloov pauv qhov hluav taws xob los ntawm 1.5V txog 15V thiab tam sim no los ntawm 0A mus rau qhov siab tshaj tam sim no piv txwv li tsawg dua 5A

NCO TSEG: Muab cov cua sov cais rau ob qho tib si transistor thiab tus tswj IC. Nco ntsoov tias ob lub cua sov tsis tuaj yeem sib cuam tshuam nrog ib leeg.

Vam tias qhov no yuav pab tau rau cov uas tab tom nrhiav lub zog siv hluav taws xob uas tuaj yeem tswj tau ob qho tib si hluav taws xob thiab tam sim no

Ua tsaug !!