Le 21.10.2013 18:58, Kirk Wallace a écrit : > Andy, by the way, I tried a Delon doubler on a 240VAC 3ϕ VFD from 120VAC > 1ϕ. I seem to recall the DC output was around 360VDC, but the VFD didn't > seem to mind. I was hoping to try the Delon on 240VAC 1ϕ, but it seems > the output would be around 720VDC, which would be significantly beyond > the expected DC voltage for 440VAC class VFDs. More work needed. > > http://www.digikey.com/product-search/en?x=16&KeyWords=493-8195 > http://www.digikey.com/product-search/en?x=16&keywords=FFPF20UP40S >
Usually, there is 2 family of IGBT, 1200V rating (used with 400Vac and up), and 600V rating (used with 230Vac and so on..). 230V device mostly work with single capacitor (400V or 450V maximum), 400V device use serial capacitor (2x 400V, or 2x 450V), allowing up to 800 or 900V on the DC bus. If you have an inverter with 1200IGBT, check capacitor (they usually are in serie, most probably allowing 800Vdc or even 900Vdc). imho, no problem to run a 440Vac class CFD @ 720Vdc. 440Vac with 3phases will give a DC voltage of 440*sqrt(2) = 620V, you are "only" 100V upward! ------------------------------------------------------------------------------ October Webinars: Code for Performance Free Intel webinars can help you accelerate application performance. Explore tips for MPI, OpenMP, advanced profiling, and more. Get the most from the latest Intel processors and coprocessors. See abstracts and register > http://pubads.g.doubleclick.net/gampad/clk?id=60135991&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
