초록 ▼

A shaft-mounted electronic sensor with an independent, rotating power supply, and a method for powering shaft-mounted electronic sensors by harnessing the energy present in the residual magnetic fields present in the permanent magnet armature windings of a generator or motor. Windings are placed on

A shaft-mounted electronic sensor with an independent, rotating power supply, and a method for powering shaft-mounted electronic sensors by harnessing the energy present in the residual magnetic fields present in the permanent magnet armature windings of a generator or motor. Windings are placed on the shaft of a rotating machine such as a synchronous motor or generator that uses a permanent magnet generator for supplying exciter field power via a regulator. These windings are placed such that they rotate with the shaft and break the lines of flux produced in the permanent magnet stationary armature windings. Breaking the lines of flux induces a current in the windings of the invention which is used to power an electronic sensor mounted on the shaft.

대표청구항 ▼

[ What is claimed is:] [1.] 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

[ What is claimed is:] [1.] 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.