Best core type (material) for lowest size 50Hz 600VA transformer..?

[Anna Conda]

Hello All, I am seeking the best core material available to minimise the size (and dissipation) of a 600VA 230Vac to 32Vac mains transformer 50Hz. Presumably some sort of tape wound C core construction?
If any one can point me to a manufacturer of such cores I would be highly appreciative.
Are there high performance cores (presumably 1.8 Tesla or higher) with reasonable losses out there?
Regards,
Anna.

 

[FvM]

E.g. Vacoflux

 

[The Electrician]

There are some references here that will lead you to other suppliers:

https://en.wikipedia.org/wiki/Permendur

 

[Anna Conda]

Vacoflux-48 appears to be the best so far...!
2 Tesla peak easy and 2W/kg at 50Hz, 2T
allowing a xfmr half the size of conventional...

 

[Anna Conda]

Also Supermendur, its seems that 48-50% cobalt (with a varying amount of other metals thrown in) is made by more than 3 manufacturers, all giving just >2 Tesla operation and core losses just over 2 watt / kg for 50Hz, 2T. And up to 0.35mm thickness lams, or tape wound cut cores (or not cut for very square B-H loops)
Some of these have been around for >10 years too...

 

[FvM]

I wonder if these highflux ferromagnetic materials are currently used for low frequency transformers? I read from the Vac web site that the cobalt alloys are mainly marketed for compact motors and generators. But I didn't yet stumble upon a transformer application.

The high-tech material for transformers is still grain oriented electrlcal steel. http://www.tkes.com/web2010/tkeswebcms.nsf/www/en_publikationen.html