Patent ID: 8803384
Filing Date: 2014-08-12
Classification: H02K,H02P

Abstract:
1. A device comprising: power connectors; a rotor; a stator comprising multiple coils arranged to form a first phase element and a second phase element, the first phase element including a first coil group including at least a first coil and a second coil, and a second coil group including at least a third coil and a fourth coil, wherein the rotor is positioned between the first coil group and the second coil group; and one or more switches that enable reconfiguration of the first phase element between multiple modes by switching an electrical configuration of the first coil group and the second coil group, wherein the first phase element is switchable independently of the second phase element, wherein, in a first mode of the multiple modes, the first coil group and the second coil group are arranged with the first coil in a first coil path and the second coil in a second coil path, wherein the second coil path is coupled to the power connectors in parallel with the first coil path; wherein the first coil group and the second coil group are arranged such that a first voltage generated across the first coil path due to relative motion of the rotor and the stator is substantially equal to a second voltage generated across the second coil path due to the relative motion and wherein, in the first mode of the multiple modes, the first coil and the fourth coil are coupled together to form a first series coil set, and wherein the first series coil set is coupled in parallel with the second coil and the third coil to the power connectors.