cum izolez magnetic

[Vizitator multysat]

buna tuturor acestui forum ma bucur ca v-am descoperit cum izolez magnetic un difuzor care vreau sa il pun linga un monitor de calculator

[Vizitator Vasile]

Daca nu este izolat el atunci sigur ai sanse minime sa-l izolezi. Poti sa-i tragi peste magnet o conserva din tabla de fier dar nu cred ca o sa obtii rezultatele scontate.

[Vizitator multysat]

multumesc mult de raspunsul prompt

[Mircea Bartic]

mai poti folosi magneti sub forma de inel, montati pe partea posterioara a magnetului difuzoruluiAstfel vei reusi sa ecranezi macar partial campul magnetic

[AerosouL]

Asa pentru "cultura mea generala", puteti sa imi explicati si mie "ei" cum ecraneaza difuzoarele? :roll: 10x

[Mircea Bartic]

Exista anumite materiale care se pare ca au capacitatea de a ecrana campul magnetic de exemplu in harddisk-uri exista o piesa de otel (aparent) care reuseste sa ecraneze campul magnetic foarte intens al magnetilor care se gasesc de o parte si de alta a bobinei care misca capul de citireAm intrebat si eu pe multa lume la vremea aceea si nu a putut nimeni sa-mi spuna ce material este acela.

[Vizitator mister_rf]

Exemplu de materiale folosite pentru ecranare magnetica:

- Mumetal, an 80% nickel-iron alloy specially designed for magnetic shielding applications.- Amunickel is a medium permeability material providing greater saturation protection than Mumetal. Amunickel is a 48% nickel-iron alloy.- Cryoperm 10 is a high nickel content alloy which is specially processed to provide increasing permeabilities with decreasing temperatures. This material, depending on a discrete annealing cycle, is designed for use at either 4.2K or 77.3K.

De obicei producatorii utilizeaza metoda de ecranare activa , asa cum a spus si NeXuS_3, prin utilizarea unui magnet secundar conectat in exterior cu polaritate opusa.

Today many NMR and magnet vendors are providing active magnet shielding. This is done by building a second magnet on the outside of the main magnet with a field of the opposite sign, thereby canceling the external magnetic field. Here the outside magnet acts as the other pole with the top of the outside magnet being the south pole and the bottom of the magnet being the north pole. This is a really good flux channel! Obviously, if the shielding magnet and the main magnet were of the same size and strength, the net field inside and outside the magnet would be zero. To avoid this problem the outside magnet is bigger in size and therefore can operate at a smaller field strength. This is because the field at some distance from the magnet is less than the maximum field strength and it is this field which needs to be cancelled. Using active shielding always means that some of the main magnet's field is being cancelled, so this technique can only be used when you have field strength to burn

[Vizitator multysat]

maine primesc de la un strungar niste capace de otel inox sa vad daca merge ecranate