Yuav Ua Li Cas Lub Rooj Zaum Fais Fab: 20 Kauj Ruam (nrog Duab)

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:26

Lub rooj zaum siv hluav taws xob yog qhov khoom siv tau yooj yim heev kom muaj nyob ib puag ncig rau cov khoom siv hluav taws xob nyiam, tab sis lawv tuaj yeem kim thaum yuav los ntawm khw. Hauv Phau Ntawv Qhia no, kuv yuav qhia koj, yuav ua li cas hloov pauv lub rooj zaum lub zog siv hluav taws xob nrog cov peev nyiaj tsawg.

[Ua Si Video]

Koj tuaj yeem pom tag nrho kuv cov phiaj xwm ntawm:

Lub hom phiaj tseem ceeb ntawm txoj haujlwm yog kawm paub yuav ua li cas cov khoom siv hluav taws xob ua haujlwm. Thaum pib, los piav qhia txoj haujlwm ua haujlwm ntawm Cov Khoom Siv Hluav Taws Xob Tawm, Kuv tau ua piv txwv ntawm LM 317 raws li lub zog siv., Kuv tau yuav Cov Khoom Siv Hluav Taws Xob los ntawm Banggood thiab sib sau ua ke.

Qhov no yog cov khoom siv hluav taws xob ruaj khov zoo uas qhov hluav taws xob tuaj yeem tswj tau tas li, thiab thaj tsam uas tswj hwm qhov hluav taws xob yog 0-30V. Nws txawm tias muaj qhov txwv tam sim no uas tuaj yeem tswj tau qhov tso tawm tam sim no los ntawm 2mA txog 3A nrog lub peev xwm los tswj qhov tam sim no tsis tu ncua, thiab cov yam ntxwv tshwj xeeb no ua rau lub cuab yeej no yog qhov cuab yeej siv tsis tau hauv lub lab sim.

Nta:

Cov tswv yim hluav taws xob: 24V AC

Tawm tswv yim tam sim no: 3A siab tshaj

Cov zis hluav taws xob: 0 txog 30V txuas ntxiv kho tau

Cov zis tam sim no: 2mA - 3A kho tsis tu ncua

Cov zis hluav taws xob ripple: yam tsawg kawg 0.01%

Kauj Ruam 1: Cov Cuab Yeej thiab Qhov Yuav Tsum Tau

Daim Ntawv Teev Npe:

1. Kauj Ruam Down Transformer - 24V, 3A (Jaycar)

2. DIY Cov Khoom Siv Hluav Taws Xob (Banggood / Amazon)

3. Tshav Kub Kub thiab Ntxuam (Banggood)

4. Volt-Amp Vaj Huam Sib Luag (Amazon)

5. Potentiometer pob qhov rooj (Banggood)

6. Buck Converter (Amazon)

7. USB chaw nres nkoj (Amazon)

8. Binding Post Txiv tsawb Plug (Amazon)

9. IEC3 Lub Hau Hluav Taws Xob (Banggood)

10. Rocker Hloov (Banggood)

11. Ntsuab LED (Amazon)

12. LED tuav (Banggod)

13. Thaum Tshav Kub Kub Tube (Banggood)

14. Tus Kheej Roj Hmab Taw (Amazon)

15. 3D luam ntawv filament-PLA (GearBest)

Cov Cuab Yeej/ Tshuab Siv

1. 3D Tshuab Luam Ntawv-Creality CR-10 (Creality CR10S) lossis Creality CR-10 Mini

2. Soldering Iron (Amazon)

3. DSO- RIGOL (Amazon)

4. Glue Gun (Amazon)

Kauj ruam 2: Basic Block Diagram

Ua ntej nkag mus rau hauv cov txheej txheem ua, koj yuav tsum paub cov khoom siv yooj yim ntawm Cov Tawm Tawm Tawm Hluav Taws Xob.

Lub hauv paus tseem ceeb ntawm cov khoom siv hluav taws xob tawm yog:

Transformer: Tus hloov pauv hloov pauv lub zog hluav taws xob mus rau tus nqi uas xav tau. Nws yog siv los nqis qis qhov hluav taws xob Qhov no kuj tseem ua haujlwm cais cov khoom siv hluav taws xob los ntawm cov hluav taws xob nkag mus rau kev nyab xeeb.

Rectifier: Lub zog tso tawm ntawm tus hloov pauv yog hauv AC, qhov no yuav tsum tau hloov pauv mus rau DC. Tus choj rectifier hloov AC rau DC.

Kev tawm tswv yim Smoothing Capacitor / Lim: Qhov hloov pauv qhov hluav taws xob los ntawm lub rectifier yog pulsating DC voltage muaj cov ntsiab lus ripple heev. Tab sis qhov no tsis yog peb xav tau, peb xav kom muaj lub ripple dawb DC waveform. Qhov lim dej lim tau siv los ua kom cov ac hloov pauv (ripple) los ntawm qhov hloov kho qhov hluav taws xob. Lub chaw tso dej loj loj tau siv rau qhov no.

Kev tswj kab tawm: Qhov hluav taws xob tso tawm lossis tam sim no yuav hloov pauv thaum muaj kev hloov pauv ntawm cov tswv yim los ntawm cov kab hluav taws xob lossis vim hloov pauv thauj khoom tam sim no ntawm cov khoom siv hluav taws xob. tas li txawm tias hloov pauv ntawm cov tswv yim lossis lwm yam kev hloov pauv tshwm sim.

Load: Daim Ntawv Thov Load

Kauj ruam 3: Transformer

Kev tawm tswv yim siab AC mus rau hauv lub tshuab hluav taws xob uas feem ntau nqis qis qhov hluav taws xob AC los ntawm lub zog mus rau qhov hluav taws xob qis AC xav tau rau peb daim ntawv thov. poob hauv tus choj diode thiab tus tswj kab tawm. Ib qho kev hloov pauv ntawm 24V hloov pauv tau qhia saum toj no. Feem ntau peb tso cai txog 2V - 3V poob rau kev teeb tsa tus choj txhim kho. Yog li qhov hloov pauv theem nrab tuaj yeem suav tau raws li hauv qab no

Piv txwv:

Piv txwv tias peb xav ua lub hwj chim muab hluav taws xob tso zis ntawm 30V thiab 3A.

Ua ntej tus choj rectifier qhov hluav taws xob yuav tsum = 30 + 3 = 33V (Peak)

Yog li RMS qhov hluav taws xob = 33 /sq hauv paus (2) = 23.33 V

Qhov ntsuas qhov ntsuas hluav taws xob nyob ze tshaj plaws muaj nyob hauv khw yog 24V. Yog li peb qhov hloov pauv ntsuas yog 230V/24V, 3A.

Nco tseg: Cov lus suav saum toj no yog kwv yees kwv yees kom yuav lub tshuab hluav taws xob. Kev ntsuas kom raug koj tau txiav txim siab qhov hluav taws xob poob thoob plaws diodes, qhov hluav taws xob poob qis ntawm tus tswj hwm, ripple voltage thiab qhov ua haujlwm tau zoo ib yam.

Kauj Ruam 4: Choj Rectifier

Tus choj rectifier hloov pauv qhov hloov hluav taws xob lossis tam sim no mus rau qhov sib xws ncaj qha tam sim no (DC) ntau. Cov tswv yim rau lub rectifier yog ac qhov nws cov zis yog unidirectional pulsating DC.

Qhov hluav taws xob poob thoob plaws lub hom phiaj dav dav yog ib puag ncig 0.7V thiab schottky diode yog 0.4V. Txhua lub sijhawm tam sim no ob ntawm diodes hauv tus choj rectifier tab tom ua haujlwm. Tab sis txij li cov diode ua hnyav, nws yuav ua tau zoo dua. Tus nqi nyab xeeb zoo yog ob zaug tus qauv lossis 0.7 x 2 = 1.4V.

Qhov DC tso tawm tom qab tus choj txuas hluav taws xob yog kwv yees sib npaug rau qhov thib ob qhov hluav taws xob sib npaug los ntawm 1.414 rho tawm qhov hluav taws xob poob thoob plaws ob qho kev coj ua diodes.

Vdc = 24 x 1.414 - 2.8 = 31.13 V

Kauj Ruam 5: Ua kom lub Capacitor / Lim

Kev hloov kho qhov hluav taws xob los ntawm lub rectifier yog pulsating DC voltage muaj cov ntsiab lus ripple heev. Cov ripples loj uas muaj nyob hauv cov zis ua rau nws yuav luag tsis yooj yim sua kom siv tau hauv ib daim ntawv thov uas muaj zog. Yog li siv lub lim dej. Qhov feem ntau lim yog siv lub capacitor loj.

Cov txiaj ntsig tau tshwm sim yoj tom qab Smoothing Capacitor tau qhia saum toj no.

Kauj Ruam 6: Tus Tswj

Qhov hluav taws xob tso tawm lossis tam sim no yuav hloov pauv lossis hloov pauv thaum muaj kev hloov pauv ntawm cov tswv yim los ntawm lub zog hluav taws xob lossis vim hloov pauv ntawm kev thauj khoom tam sim no ntawm qhov tso tawm ntawm lub zog tswj hwm los yog vim lwm yam xws li hloov pauv kub. Qhov teeb meem no tuaj yeem raug tshem tawm los ntawm kev siv tus tswj hwm IC lossis los ntawm cov khoom siv hluav taws xob tsim nyog uas muaj ob peb yam khoom siv. Tus tswj hwm yuav tswj hwm cov zis tas li txawm tias hloov pauv ntawm cov tswv yim lossis lwm yam kev hloov pauv tshwm sim.

IC zoo li 78XX thiab 79XX tau siv los ua kom tau qhov tseem ceeb ntawm qhov hluav taws xob ntawm qhov tsim tawm. Qhov twg zoo li IC zoo li LM 317 peb tuaj yeem hloov kho qhov hluav taws xob rau qhov xav tau tas mus li. DC qhov hluav taws xob tawm lwm yam tshaj li qhov siv hluav taws xob ruaj khov. Qhov piv txwv saum toj no siv LM3 17 qhov ntsuas hluav taws xob IC. Qhov kev hloov kho tau los ntawm tus choj hla tus choj tag nrho tau pub rau LM317 tus tswj hwm IC. Los ntawm kev hloov pauv tus nqi ntawm lub zog siv hauv lub voj voog no, cov zis hluav taws xob tuaj yeem tswj tau yooj yim.

Txog tam sim no kuv tau piav qhia tias Chav Ua Haujlwm Cov Hluav Taws Xob Ua Haujlwm Li Cas.