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Operating a resolver and detecting a defect in the resolver

  • US 9,857,204 B2
  • Filed: 06/11/2015
  • Issued: 01/02/2018
  • Est. Priority Date: 06/12/2014
  • Status: Active Grant
First Claim
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1. An apparatus for operating a resolver, the apparatus comprising:

  • at least one receiver winding and an exciter winding which are associated with a rotor, andan evaluation device which determines an angular position of the rotor as a function of an induced voltage that is generated by the exciter winding and detected by the receiver winding,wherein the receiver winding is connected at a first end to a first actuable switch by a first RC circuit including a first resistor in series with a first capacitor, the first actuable switch connecting the first RC circuit as required to a positive voltage source, andwherein the receiver winding is connected at a second end to a second actuable switch by a second RC circuit including a second resistor in series with a second capacitor, the second actuable switch connecting the second RC circuit as required to a negative voltage source, and to a control unit which simultaneously actuates the first and second actuable switches as required and thereby monitors the oscillation behavior of the receiver winding in order to detect a defect in the resolver.

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