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Inductive position sensor

  • US 10,444,037 B2
  • Filed: 11/02/2017
  • Issued: 10/15/2019
  • Est. Priority Date: 08/22/2017
  • Status: Active Grant
First Claim
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1. An inductive position sensor, comprising:

  • an excitation element comprising;

    a power source;

    a control circuit;

    a first excitation coil, coupled to the power source, configured to generate a first electromagnetic field;

    wherein the first excitation coil is configured in a twisted loop design;

    a second excitation coil, coupled to the power source, configured to generate a second electromagnetic field;

    wherein the second excitation coil is configured in a twisted loop design; and

    a third excitation coil, coupled to the power source, configured to generate a third electromagnetic field;

    wherein the thirds excitation coil is configured in a twisted loop design;

    wherein the control circuit controls the flow of electrical currents from the power source into and through one or more pairings of the first excitation coil, the second excitation coil and the third excitation coil;

    a rotor configured to be coupled to each of the first electromagnetic field, the second electromagnetic field and the third electromagnetic field, based upon a current position of a target;

    a receive element, comprising;

    a signal processor;

    a first receive coil, coupled to the signal processor, configured for at least one of the first electromagnetic field, the second electromagnetic field and the third electromagnetic field to induce a first voltage;

    wherein the first receive coil is configured in a twisted loop design;

    a second receive coil, coupled to the signal processor, configured for at least one of the first electromagnetic field, the second electromagnetic field and the third electromagnetic field to induce a second voltage;

    wherein the second receive coil is configured in a twisted loop design; and

    a third receive coil, coupled to the signal processor, configured for at least one of the first electromagnetic field, the second electromagnetic field and the third electromagnetic field to induce a third voltage;

    wherein the signal processor determines the current position of the rotor based on a received voltage, wherein the received voltage is a combination of at least one of the first voltage, the second voltage and the third voltage.

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