ev_nred wrote:epic!!! nice job man!!!
sorry for asking a stupid question, any idea on if and when your going to be selling these monsters? if so how much well u be selling them for? thanks
I Will probably sell a small number at some point. They will be hand built initially.
I need to get the power board up and running. I have given myself a target of hall effect based trapesium motor drive running by the end of the year provided I get the power board ordered in the next few days. I will road test this on my GM 1000W hub motor at 57V or more if I order more lipo batteries.
Before I could sell any I need to ensure the design not only works but works for several boards and is reliable which should happen early next year.
I will keep working on software after basic functionality works. The software in the control board is user update able. I just need to finish the bootloader and It should be a matter of plug into a usb port to update software.
My plan is to start with a simple Trapezoidal hall sensor based drive and then as a separate operating mode develop full vector control including a decent sensor less one that works with sinewaves. I will probably keep some of the software proprietary but I can also provide a basic runnable set of sourcecode based on freertos that configures all the IO etc that can be used for others to implement anything they want, I would provide information as necessary.
I have not worked the cost out yet. I've been too busy getting the rest ready. I will probably start working out costs when I order another batch of parts after the first power board works but there is no way this could compete with the e-crazyman chinese controllers on price but it will provide a lot more protection and features .
As I would be buying limited numbers of parts and some of the parts are more specialised for example the shunt in the ecrazyman is probably a few cents where as the CT's in this are more like $7 from memory. My first batch of MOSFETS was painfully expensive. Hopefully If I buy more it would come down.
There could be another option for those that like building to buy bare PCBs of the power stage and a programmed micro board. That would allow a lot of customisation.
I can see NZ post taking a premium to ship it overseas , I might have to investigate the options there.
I've got to think about how to test the power electronics to full power without having the sensor less algorithm that I need for the 80-100 initially. I have a few ideas and should be able to drive it to full current short periods or time. The GM hub should be a cake walk for this controller to not only run but barbecue so I will have to get the turnigy going fairly quickly and maybe run 2 motors and controllers back to back so I can circulate power. We may have 240V mains here but you can still only pull 2 or 3KW out an outlet so many tests will have to rely on batteries.