Gene Heskett wrote: > On Sunday 04 January 2009, Jon Elson wrote: > >> Gene Heskett wrote: >> >>> If you have the drawings on the VFD, I don't imagine getting it up above >>> 400 would be a very difficult task. How much voltage is available for its >>> output stage? >>> >> It is all controlled by a microcontroller, and about 150 setup >> parameters entered through the programming panel. >> It does what it does, enforced by the range of these parameters. >> >> Jon >> >> > So you don't have the schematics then, bummer. > Schematics would be useless, anyway. There is a power brick with all the power semis in one package. There is a board with IGBT drivers, and there is a microcontroller chip that does EVERYTHING else. So, the frequency, pulse width, accel/decel ramps, absolutely everything it does, is handled by code in that micro. There are 1000 Hz VFDs on the market, but I might have to buy new to get one.
Jon ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
