On 11/29/2014 12:29 AM, Karlsson & Wang wrote: > I would reccomend a book in power electronics I read "Power > Electronics: Converters, Applications, and Design" at the university. > The most important part to understand is the loss calculation, then > you know why you need a good gate driver.
Thank you for the book recommendation. I have found a lot of good information trolling through manufacturer's documents and various websites. This started as just trying to scratch an itch -- bare bones FET and motor, but I tend to get drawn in while making progress. Diode reverse recovery is > also important. I assume you already know why you need an isolated > power supply to the high side driver? Oh yes, but I kind of resent having to wiggle the high side to keep the driver charged. I'm tending to think, since a tiny AVR is so cheap, I could add one to maintain the high side supply, and maybe do other things since it is there. I like the idea of being able to go right up to 100% duty without giving it a thought. Another thing the AVR could do is monitor the current sensor. It seems that monitoring current is important for driver protection as well as possibly motor protection and torque control -- but, what current? Peak current seems important to prevent blowing out components. Average current is needed for motor load and driver over-heating. I guess I'll find out as I go. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
