The modular conveyor system comprises N interconnected track sections,
forming a continuous track, wherein each track section features a
plurality of individually controlled coils stretching along the length
thereof. Plural pallets, each having thrust producing magnets, travel
independently alone the track. The track also comprises multiple linear
encoder readers spaced at fixed positions therealong, and each pallet
includes a linear encoder strip having a length R greater than the
spacing E between the readers. Track section controllers associate the
encoder strips with only one reader at any time in order to resolve the
position of the pallets based on the fixed position of the readers and
the relative positions of the strips in relation thereto. The section
controllers also regulate and commutate the coils of the corresponding
track sections in order to independently control each pallet.
Communication links interface adjacent section controllers situated in
adjacent track sections. The electromagnetic structure and distributed
control architecture of the conveyor system enable it to independently
control multiple practical pallets yet be constructed out of modular
track sections, with little practical restriction on the length of the
conveyor system or the number of pallets controlled thereby.