I need to control two hub mounted brusless dc motors. I have the theory, they are similar to three phase ac motors with electronics pulsing the field coils to get the correct direction of rotation and speed. Three half h bridges are used to control each field winding and hall effect switches built intobthe motor return the position of each of the 3 rotating elements allowing the controller to know when to switch.
I was wondering if anybody out there has had experience with this type of motor and drive. I can figure the logic and timing but there are extra pulses delivered in anti phase to other fields to improve power output and smoothness. This is foxing me.
Are there any three phase h bridge shields out there?
The motors are 350 watts each nominally 36v 10A at full load....... But currents can be in excess of 100A instantaneously. I will be needing something "chunky"!
I did see a commecial board for piccolo(?) Possibly could work with that as it has SPI bus.
Appreciate any assistance, suggestions or beer youmay have to offer.
For those of you who are curious these are to be the main drive motors of a Dalek. Considerably cheaper than wheelchair motors and a fraction of the size being all self contained in the 17cm x6 cm wide wheel.
