Patent ID: 7535143
Filing Date: 2009-05-19
Classification: B60K,B60L,H02K,Y02T,Y10T

Abstract:
1. An electromagnetic coupler, comprising: a first electric machine comprising a first stator having an axis bearing at least one first coil wound on an annular first fixed yoke having an axis and a U-shaped transverse cross section, and configured to be coupled by magnetic induction with a first part of an output rotor mobile rotation-wise about the axis relative to the first stator, the coupling being provided via an inner drum, mobile rotation-wise about the axis relative to the first stator and to the first part and spaced apart from the first part and from the first yoke by an additional air gap and a first air gap, respectively; a second electric machine having an axis and comprising a second stator bearing at least one second coil wound on a second yoke, and configured to be coupled by magnetic induction with a second part of the output rotor via a second air gap; and an electronic unit configured to supply alternating current to the first coil, wherein the first coil is wound on the first yoke about the axis of the first stator.