Kirk Wallace wrote: > Removing C14 and C15 stopped the inductor heating without affecting > anything else, as far as I could tell. I wonder if smaller caps or a > different core type might help. >
Excellent! Well, these are 47 uH 15 A inductors, and pretty amazing at that size. I have found nothing else anywhere near the size or price of these units that matches that rating. I think the caps are way too big. It is not necessary to completely suppress the PWM waveform at the motor, just knock down all the harmonics. A much smaller capacitor would do fine, maybe .001 uF or so. I'd use a 250 V film capacitor for low losses. A ceramic might well get very hot due to the AC current. But, if everything is running fine, there is no need to try adding small caps back. Jon ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
