On 11/28/2014 10:17 AM, John Kasunich wrote: > May I make a suggestion? I post my work in order to get feedback. Thank you very much for your help.
My next step, which I have yet to post, added a TC4422 after the opto-isolator. That is what is in the next scope picture. The FET ran with barely a hint of heating while under a load (one hand on the FET the other trying to stall the motor, not recommended, do _not_ do as I do, folks). The HCPL3150 looks like it combines the bits I have. I'll have to get some on order. The circuit only drives the motor in one direction and has no speed regulation, so isn't all that useful, but fun so far. I would like to work more on sensorless speed regulation, but my KBIC board already does this very well, and now that I'm not blowing out FETs anymore, I'd like to move on to BLDC motors. One nice thing about this setup is that someone with a decent electronic parts bin can touch some important bits of LinuxCNC in short order. -- 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
