Patent ID: 8575922

Claim:
A multi-turn angle sensor comprising a plurality of resolvers, further comprising: a plurality of rotors, each rotating in a different manner with respect to an input shaft by use of a speed reduction mechanism; and a common stator portion including a plurality of sets of pole teeth, each set provided around each of the plurality of rotors, wherein each of the rotors and each of the sets of pole teeth disposed around each of the rotors form each of the resolvers; at least two of the plurality of resolvers are arranged in a single plane vertical to a rotation central axis of each rotor; and the common stator portion including the plurality of sets of pole teeth, each set disposed around each of the rotors, is formed by laminating electromagnetic steel sheets, each having an identical shape including, in a single plane, the plurality of sets of pole teeth corresponding to each of the rotors, wherein sensing wirings wound around respective pole teeth of the plurality of resolvers are configured by winding a single length of electrical wire with no joint for a plurality of pole teeth of the plurality of resolvers, and wherein excitation wirings wound around respective pole teeth of the plurality of resolvers and the sensing wirings wound around the respective pole teeth of the plurality of resolvers are connected to a common connecting portion.