phantom
1 µW
Kelly have a 4.5kw, 72V controller, the KEB72450, intended for use on a BMC V3 hub motor:
http://www.newkellycontroller.com/product_info.php?cPath=24&products_id=619
As the V3's, et al, are internally geared with a motor that spins 5X the outer hub speed, they have sacrificed some firmware functionality in order to increase the max electrical RPM to 70,000. With an 8 pole Astro, this equates to 8750 RPM max according to their formula, with hall sensor feedback and simple analogue throttle. Clearly the max RPM is not high enough (!) but enough to be useful for many applications. Whilst I realise this is a potentially sacriligeous concept, devoid of the pico form factor of RC style controllers, there is potentially a high voltage/power off the shelf solution that addresses the lack of more sophisticated RC controllers presently available. Additionally there is also the added difficulty in apparently no off the shelf sensor options for Astros (yet???), however fitting a sensor arrangement is a rather trivial excercise, even if it has to be an external optical setup with suitable chopper disc for nice stable and clean signals. What is also exciting is the software configuration options available, including both torque and velocity control options.
It sounds like a viable option in lieue of readilly available vector/FOC style RC controllers, which would be the answer to everyones prayers. There is a German one, but only to 60V, and with a price most would find scary! When you consider the considerable amount of processing power required with these more advanced control methods the price is rather reasonable in reality, paricularly compared to industrial servo controllers. The simple RC controller processors probably could not hope to number crunch quickly enough.
Comments are cordially invited...
http://www.newkellycontroller.com/product_info.php?cPath=24&products_id=619
As the V3's, et al, are internally geared with a motor that spins 5X the outer hub speed, they have sacrificed some firmware functionality in order to increase the max electrical RPM to 70,000. With an 8 pole Astro, this equates to 8750 RPM max according to their formula, with hall sensor feedback and simple analogue throttle. Clearly the max RPM is not high enough (!) but enough to be useful for many applications. Whilst I realise this is a potentially sacriligeous concept, devoid of the pico form factor of RC style controllers, there is potentially a high voltage/power off the shelf solution that addresses the lack of more sophisticated RC controllers presently available. Additionally there is also the added difficulty in apparently no off the shelf sensor options for Astros (yet???), however fitting a sensor arrangement is a rather trivial excercise, even if it has to be an external optical setup with suitable chopper disc for nice stable and clean signals. What is also exciting is the software configuration options available, including both torque and velocity control options.
It sounds like a viable option in lieue of readilly available vector/FOC style RC controllers, which would be the answer to everyones prayers. There is a German one, but only to 60V, and with a price most would find scary! When you consider the considerable amount of processing power required with these more advanced control methods the price is rather reasonable in reality, paricularly compared to industrial servo controllers. The simple RC controller processors probably could not hope to number crunch quickly enough.
Comments are cordially invited...
