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SIGNAL TRANSMITTING SYSTEM FOR ROTATING APPARATUS

  • US 3,758,845 A
  • Filed: 11/01/1971
  • Issued: 09/11/1973
  • Est. Priority Date: 05/12/1969
  • Status: Expired due to Term
First Claim
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1. A signal transmitting system for a dynamoelectric machine comprising a first coil formed of a plurality of turns of an electrical conductor wound in the form of a complete loop, said coil being laid flat upon a substantially cylindrical rotor surface disposed concentrically about the axis of the rotor, two opposite sides of said coil being arcuately disposed about said rotor axis at axially spaced locations along said cylindrical surface, a second coil formed of a plurality of turns on an electrical conductor wound in the form of a complete loop, said second coil being laid flat upon an arcuately shaped stator surface concentrically disposed about the cylindrical rotor surface, two opposite sides of said second coil being arcuately disposed about said rotor axis at axially spaced locations along said stator surface, one said coil having an arcuate length and disposition relative to the other said coil to continuously maintain at least a pre-determined amount of mutual inductive coupling between said first and second coils during rotation of said rotor, means mounted upon said rotor for generating an electrical signal indicative of a pre-determined physical characteristic of said rotor, means connecting said signal generating means to said first coil to transform said electrical signal to said second coil by the continuous mutual induction maintained between said coils during rotor rotation and detection means connected to said second coil for producing an output signal proportional to the detected physical characteristic of said rotor.

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