www.elektronik.si

[lojzek]

600W trafo pri zagonu potegne kar konkreten tok. Tudi brez bremena . Mogoče bi potreboval soft start. Za začetek poskusi z vklopom samega transformatorja. In to večkrat.
Sedaj še ne razmišljam v smeri pokvarjenega receiverja.

Za testni soft start lahko uporabiš kar kalorifer, vezan zaporedno s primarjem. Mislim, da je to nekdo že predlagal

[andreju]

kako naj to povežem vzporedno pred trafotom? in če mi lahko malo bolj konkretno razložiš prosim, nisem elektronik in se vse skupaj šele učim

nekje sem prebral, da bi naj najprej vklopil trafo šele kasneje priklopil porabnika?

[andreju]

pa tole sem našel:

Toroidal transformers have many advantages over conventional transformers. Unfortunately, one of the consequences of a toroidal transformers’ superior magnetic properties is that the transformer "remembers" what polarity the primary voltage had immediately before the power was last shut off. Whenever the voltage has the same polarity when the transformer next is turned on, the core will saturate for part of a half-cycle, and a high in-rush current will flow in the primary of the transformer.

Large toroidal transformers (1.5 KVA and higher) can have up to 80 times larger inrush than conventional transformers, because the remnant magnetism is nearly as high as the saturation magnetism at the "knee" of the hysteresis loop.

This means that larger toroidals (1.5 KVA and higher) should not be switched on without some caution and consideration for how to deal with the inrush current

je to mogoče vzrok? in kako to preprečiti? mogoče tako, da ga večkrat vklopim samega, šele nato priklopim porabnika-kot je že bilo rečeno?

[protoncek]

Tak trafo mora imeti soft start in pika. Sicer ti bo metalo varovalke ven. Naredi si vezje, da ob vklopu primar najprej pelješ čez štiri upore 10 ohm 5-7W ( torej te štiri upore v serijo s trafotom), po sekundi, dveh pa naj ti en rele te upore kratko sklene in bo trafo direktno na 230 V.

[pirpy]

Lp,
Ali si rešil problem?