Buck Converter PDB: 5 Kauj Ruam

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

Tom qab:

UCR RoboSub yog Tsev Kawm Qib Siab California Riverside kev sib tw sib tw tsav tsheb hauv av (AUV) txoj haujlwm uas sib tw thoob ntiaj teb hauv Kev Sib Tw Robonation RoboSub. Kev sib tw RoboSub yog muaj txhua txhua xyoo rau AUV los ntsuas lawv txoj kev ywj pheej los ntawm kev ua tiav cov haujlwm hauv qab. RoboSub yuav tsum muaj peev xwm ua haujlwm sib txawv rau kev sib tw xws li poob qhov hnyav thiab kev tswj hwm tus kheej. Yog li RoboSub xav tau cov khoom siv hluav taws xob ib leeg los txhawb lub zog kho vajtse rau kev ua haujlwm.

Lub Hom Phiaj:

Tus hloov pauv phaw yog lub rooj faib khoom siv hluav taws xob ib sab uas tau txais lub zog los ntawm ib ntawm ob lub roj teeb tseem ceeb. Nws muaj 14.8V cov tswv yim thiab cov zis ntawm 12V thiab 5V. Cov hloov pauv uas peb tab tom siv rau hauv Circuit no yog LM257602T-5 rau qhov tso tawm 5V thiab LM2576s-ADJ P+ rau kev hloov kho qhov hluav taws xob.

Khoom siv

• 1000μF tso zis capacitor
• 100μF input capacitor
• 67 μH inductor
• 8k thiab 1k resistors
• LM257602T-5 thiab LM2576s-ADJ P+ hloov
• 1N5822 Flyback schottky diode - hais txog kev ntes diode

Kauj Ruam 1: Tsim

Txheej txheem cej luam:

Muaj ob lub tshuab hluav taws xob: lub tshuab hluav taws xob nkag thiab lub tso tawm hluav taws xob. Cov khoom siv hluav taws xob yuav tsum muaj qis ESR (Sib npaug Series Kuj) ntawm tus pin nkag thiab tus pin hauv av kom muaj kev ua haujlwm ruaj khov. Nws tiv thaiv kev hloov pauv hluav taws xob loj los ntawm qhov tshwm sim ntawm lub tswv yim. Lub capacitor yuav tsum nyob ze tus tswj hwm thiab siv cov coj luv. Lub tshuab hluav taws xob tso tawm muaj ob lub luag haujlwm tseem ceeb: nws lim cov zis thiab muab cov tswj kev ruaj ntseg. ESR ntawm cov khoom siv hluav taws xob tso tawm thiab qhov siab tshaj − rau − siab tshaj tus nqi ntawm tus inductor ripple tam sim no yog lub hauv paus tseem ceeb uas ua rau cov txiaj ntsig ripple voltage tso tawm. Tus ntes diode muab txoj hauv kev rov qab rau qhov inductor tam sim no thaum qhov hloov pauv tawm. Yuav tsum nyob ze rau LM2576 siv cov coj luv thiab cov ntawv luam tawm luv luv kom tsis txhob muaj teeb meem EMI. Tus inductor yuav yog lub hauv paus ntawm txhua qhov kev hloov pauv lub zog tsim qauv. Kev siv lub tshuab hluav taws xob tsis zoo tuaj yeem ua rau muaj qhov hluav taws xob loj tshwm sim los ntawm kev hloov pauv tus nqi tam sim no hauv qhov hloov pauv hluav taws xob. Thaum kawg, peb tau xaiv cov kev tawm tsam no vim tias lawv muab peb qhov txiaj ntsig uas peb xav tau raws li pom hauv kab zauv hauv cov txheej txheem saum toj no. Cov resistors ua haujlwm rau qhov hloov pauv tau.

Kauj ruam 2: Prototyping

Peb tau tsim qauv pawg thawj coj no los ntawm thawj qhov tsim cov phiaj xwm rau cov uas tsis tuaj yeem hloov kho ntawm lub rooj tsav tsheb. Peb txuas txhua qhov raws nraim raws li lawv nyob ntawm peb cov phiaj xwm thiab tom qab ntawd siv digital multimeter (DMM) tshuaj xyuas qhov hluav taws xob kom paub tseeb tias peb tau txais 5V. Thaum peb paub cov nti tau ua haujlwm peb tsim kho qhov hloov pauv nti los ntawm kev hloov cov nti twg tau txuas nrog thiab ntxiv cov resistors, tom qab ntawd peb siv DMM kom ntseeg tau tias peb tau txais 12V qhov peb xav tau.

Kauj Ruam 3: Txiav Koj Li PCB Los ntawm JLCPCB

JLCPCB muab kev pabcuam sai, ua haujlwm tau zoo ntawm tus nqi tsim nyog. Koj tuaj yeem tau txais 5 cov laug cam (2 txheej), txhua xim nrog kev hloov pauv rau $ 2!

1. Txhawm rau mus ntsib https://jlcpcb.com & kos npe rau hauv/sau npe
2. Nyem nqe lus tam sim no khawm
3. Nyem rau ntawm "ntxiv koj cov ntaub ntawv gerber" khawm, thiab xa koj cov ntaub ntawv gerber Tam sim no koj tuaj yeem teeb tsa koj cov kev txwv thiab kev hloov pauv, xws li muaj nuj nqis thiab xim PCB.
4. Nyem "Txuag Rau CART"
5. Mus tom ntej thiab ntaus koj qhov chaw nyob xa khoom, xaiv txoj kev xa khoom
6. Txheej txheem xa koj daim ntawv xaj thiab them nyiaj
7. PCBs peb pab pawg xaj xaj tuaj hauv lub asthiv.