> Attached is my first pass at an IRAMS circuit. It's pretty much a copy > of the IRF datasheet example. The plan is to hook up the digital signals > to an FPGA card, Pluto-P if I can find it, or 5i25 if I sell something > on eBay. The analog signals are an unknown for now. IRF seems to > recommend using a ceramic capacitor with each electrolytic, I need to > learn more about this as well as chose a size for the motor input caps. > Any suggestions are welcome.
IIRC what can cause a sudden death of the IRAMS is overcurrent for some reason or another. To make your design fool-proof you need to sense current, possibly on all three motor phases, and do it reliably and quickly in order to shutdown the IRAMS and/or pwm-source when something bad happens. For permanent magnet servos the current-sensing is just fault-protection. If the current-sensing can be made to work accurately the same power-stage could maybe be used for induction motors with a vector-drive algorithm. Possibly this requires voltage-sensing on the uvw-phases also? With higher voltage/current the IRAMS will require cooling. I used an old cpu-heatsink+fan. You might want to put the psu/power-wiring for this on the IRAMS-PCB also. Optoisolation between the power-stage and the fpga-logic would be a good idea. AW ------------------------------------------------------------------------------ Virtualization & Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
