This is done all the time for testing transformers to the induced voltage test. Safety testing of a transformer requires a verification of a higher voltage operation and the only way to do this without saturating the core is to increase operating frequency. The formulas below show that Voltage and Frequency are inverse.
For sinusoidal transformers, this formula applies: Bmax = (V x 108) / (4.44 f N A), in Gauss Bmax = V / (4.44 f N A), in Tesla For pulse or switching transformers, this formula applies: Bmax = (V x 108) / (4 f N A), in Gauss Bmax = V / (4 f N A), in Tesla Where; Bmax = Maximum Flux Density V = applied voltage f = frequency N = turns on the winding (where V is applied) A = Core cross-section (m2) Typically silicon steel laminated transformers can withstand a saturation Gauss of something like 20 kilo Gauss. Soft ferrite on the other hand saturates around 1.5 kilo Gauss. So, aside from additional core losses due to high reluctance of âtâ he core material, you can go to quite high frequencies â.â Best, Doug On Fri, Jul 8, 2016 at 10:25 AM, David Gelfand <david.gelf...@kontron.com> wrote: > Esteemed colleagues, > > > > I have to prepare a debug setup for a DO-160 test, and we need to float > the 400 Hz power supply. Can we use an isolation transformer rated at > 60Hz, 150 VA? The EUT draws about 10W. Your input is most appreciated. > > > > Regards, > > > > David > > > > > > > - > ---------------------------------------------------------------- > > This message is from the IEEE Product Safety Engineering Society emc-pstc > discussion list. To post a message to the list, send your e-mail to < > emc-p...@ieee.org> > > All emc-pstc postings are archived and searchable on the web at: > http://www.ieee-pses.org/emc-pstc.html > > Attachments are not permitted but the IEEE PSES Online Communities site at > http://product-compliance.oc.ieee.org/ can be used for graphics (in > well-used formats), large files, etc. > > Website: http://www.ieee-pses.org/ > Instructions: http://www.ieee-pses.org/list.html (including how to > unsubscribe) <http://www.ieee-pses.org/list.html> > List rules: http://www.ieee-pses.org/listrules.html > > For help, send mail to the list administrators: > Scott Douglas <sdoug...@ieee.org> > Mike Cantwell <mcantw...@ieee.org> > > For policy questions, send mail to: > Jim Bacher <j.bac...@ieee.org> > David Heald <dhe...@gmail.com> > -- Douglas E Powell doug...@gmail.com http://www.linkedin.com/in/dougp01 - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
