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Further types


Basic information

A resolver is an electromagnetic transducer, which converts the angular position of a rotor into a electrical value.


Measuring the angular position of electric motors in:

  • Steering systems of ships
  • Control units in chemical plants
  • Machine tools
  • Industrial robots
  • Textile Machines
  • Mining equipment
  • Servo Motors

General function

Two 90° phased stator windings are arranged in a cylindrical housing, that enclose a rotor together with the rotor winding which are mounted in a housing. These rotor winding inductively couples a signal into the stator winding. The phase position of this signal is a measure of the angular position of the rotor.


  • Wear-free operation
  • Unsusceptible to soiling
  • More economical compared to optical resolvers