Jump to content

Recommended Posts

Posted (edited)

Trebuie sa construiesc un transformator SMPS cu TNY27X, miez EE25, cu o infasurare primara si doua infasurari secundare identice ca sa obtin redresat dubla alternanta un +/-15Vdc (1A !!!) si nu stiu de unde sa pornesc. M-am uitat pe net la diverse tutoriale si imi da vreo 200 de spire in primar.

1. O fi bine ?

Asta e datasheet-ul TNY27X: http://www.mouser.com/datasheet/2/328/tny274-280-4065.pdf  

si miezul care ma gandeasc sa-l folosesc e asta (2 buc.): https://www.tme.eu/ro/details/e25_13_7-3c90/miezuri-de-ferita/ferroxcube/

si carcasa asta: https://www.tme.eu/ro/details/we-2752v/carcase-si-accesorii/weisser/

2. la un transformator daca incep bobinajul de la un capat al carcasei la celalalt capat si apoi creez un secundar inceput din partea opusa, e ca si cum as obtine secundarul defazat cu 180 grade ?

3. e musai sa pun intrefier intre cele doua E-uri ? :scratchchin:

 

Edited by ionut90

Share this post


Link to post
Share on other sites
Posted (edited)

Asta inseamna 30W

Eu ma uit prima oara la ce au facut altii si in mod special la Myrra, pentru E25 au urmatoarele date:

987792496_myrrae25.thumb.jpg.4f52127dd409b9366adf770c063a5f08.jpg

daca ramii la E25 ( un pic la limita ca si putere si inghesuit la bobinat) atunci mai ai nevoie de clemele urmatoare:

https://www.tme.eu/ro/details/b66208a2010x000/carcase-si-accesorii/epcos/

TNY280 o duce bine la max 20W.

Eu as porni de la ETD29, Myrra spune:

1187267676_myrraetd29.thumb.jpg.5b5123db7984f405ba2517b6dc2ef2bb.jpg

2 miezuri ETD29, carcasa si doua cleme, TOP254YN.

9 spire pentru 15V. trebuie sa incapa pe acelas strat cele doua secundare ( pentru +15 si -15V)

La flyback neaparat intrefier!

Ramine sa hotarasti pe ce directie mergi. Si neaparat o schema unde sa apara inceputurile infasurarilor.

Edited by RockDok
  • Thanks 1

Share this post


Link to post
Share on other sites

@ionut90

1. cand spui flyback spui intrefier. Intotdeauna!
2. Tny la 30W, crapa.
3. gasesti trafuri ptr tny gata facute(bobinate cu diverse secundare) intre 5 si 10 lei. 

  • Thanks 1

Share this post


Link to post
Share on other sites

Dupa vreo 2 saptamani de cercetari m-am hotarat sa abordez schema asta:

https://u.dianyuan.com/upload/space/2012/10/27/1351317135-736931.jpg

La 05.01.2020 la 16:12, vijelie02 a spus:

3. gasesti trafuri ptr tny gata facute(bobinate cu diverse secundare) intre 5 si 10 lei. 

La schema de mai sus de unde as putea cumpara un traf ? Un link exact daca se poate! :scratchchin:

Share this post


Link to post
Share on other sites

Astea de la Comet chiar ca-s ieftine. Niciodata nu am comandat de acolo (nu stiu conditiile de comanda si transport).

Share this post


Link to post
Share on other sites

Am comandat eu si sunt foarte ok. Pana in 300 lei platesti transport national. Peste 300 lei transport gratuit. Pretul de 300 lei este fara tva.

Share this post


Link to post
Share on other sites

Am sa ma uit pe catalogul lor de componente daca merita cumparate si alte produse - voi achizitiona sigur cateva transformatoare pentru TNY. La banii aia nu merita sa le construiesc.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Recently Browsing   0 members

    No registered users viewing this page.

×
×
  • Create New...

Important Information

We use cookies and related technologies to improve your experience on this website to give you personalized content and ads, and to analyze the traffic and audience of your website. Before continuing to browse www.tehnium-azi.ro, please agree to: Terms of Use.