Patent ID: 6093986
Filing Date: 2000-07-25
Classification: H02K

Abstract:
In combination with an electrically energizeable remote sensor having input terminals, an apparatus for powering said sensor comprising:a stationary armature having at least one armature winding capable of generating a magnetic field when electrical current flows in said armature winding and capable of inducing an electric current when influenced by a passing magnetic field;a rotor array positioned adjacent said armature, said rotor array including at least one permanent magnet;said rotor array having a longitudinal axis, and said rotor array being mounted for rotation relative to said armature and about said axis;said permanent magnet being constructed and arranged to produce a first magnetic field extending to and interacting with said armature winding of said stationary armature and cooperating with said armature winding so as to generate a first current in said armature winding when said rotor array turns about said axis and to cause said first current in said armature winding to generate a secondary magnetic field interacting with said rotor array;an auxiliary winding positioned on said rotor array for interaction with said secondary magnetic field during rotation of said rotor array so as to induce a second current in said auxiliary winding, said auxiliary winding including output terminals;said sensor being mounted on said rotor array to rotate about said axis; andsaid output terminals of said auxiliary winding being electrically connected to said input terminals of said sensor to energize said sensor.