Rotary Encoder with Self-Sustained Supply of Energy

摘要

A rotary encoder has a signal encoding unit fastened at the shaft, a signal detection unit arranged in an axial direction of the shaft disposed opposite to the signal encoding unit, a signal evaluation unit, and an energy generation unit for the generation of electrical energy for the rotary encoder. The energy generation unit has a first element provided at the signal encoding unit and of a second element arranged at the circuit board of the signal evaluation unit. The first and the second element are disposed opposite to one another. The second element has a plurality of coils which are arranged in such a way that two or more coils are displaced by a pole pitch or a multiple of a pole pitch and in that the coils are switched in parallel, in series or in groups.

主权项

1. A rotary encoder for the detection of information of a rotating shaft, comprising a signal encoding unit which is fastened at the shaft, a signal detection unit which is arranged in an axial direction of the shaft disposed opposite to the signal encoding unit, a signal evaluation unit which has a circuit board arranged spaced apart with respect to the shaft in an axial direction and an energy generation unit for the generation of electrical energy for the rotary encoder, wherein the energy generation unit comprises a first element provided at the signal encoding unit and a second element arranged at the circuit board of the signal evaluation unit; wherein the first and the second elements are arranged disposed opposite one another, wherein the second element of the energy generation unit is composed of a plurality of coils which are arranged in such a way that respectively two or more coils are displaced by a pole pitch or by a multiple of a pole pitch; and wherein the coils are switched in parallel, in series or in groups.