Rotary Encoder with Self-Sustained Supply of Energy
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United States of America Patent
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Issued Date -
Apr 23, 2015
app pub date -
Aug 21, 2014
filing date -
Oct 21, 2013
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Abstract
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.
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