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System for control of an electromagnetic actuator

  • US 6,249,418 B1
  • Filed: 01/27/1999
  • Issued: 06/19/2001
  • Est. Priority Date: 01/27/1999
  • Status: Expired due to Fees
First Claim
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1. A measurement system for detecting translational position of a moving element of an electrically actuated electromagnetic transducer, said measurement system comprising:

  • drive means, for setting an electrical drive signal that is applied to a coil of said transducer, said drive signal having a known response to an input signal, and said drive signal causing an electromagnetic actuation force on said moving element;

    sense means, for sensing a single electromagnetic parameter of said transducer, wherein said single electromagnetic parameter is responsive to said electromagnetic actuation force and to said position; and

    computation means, for determining a measure of said position from said drive signal and said single electromagnetic parameter.

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