Patent ID: 6236123
Filing Date: 2001-05-22
Classification: H02K,H02P,Y02E

Abstract:
An electrical generator for providing alternating current which has a selected frequency comprising:a loop assembly and a magnet assembly, one of which is rotatable relative to the other said assembly;said magnet assembly provided with at least one ring of field magnets which are arranged to provide a circular array of magnetic fields which vary in magnitude from one circumferential position to another and wherein each of said field magnets is selected from the group consisting of permanent magnets and electromagnets;said loop assembly provided with at least one ring of electrically conductive output loops which are in said magnetic fields and occupy different circumferential positions on the loop assembly, at least a portion of said loop assembly being movable along a displacement path in said magnetic fields to change the position of said output loops with respect to said magnetic fields independently of the relative rotation between said magnet assembly and said loop assembly;actuator means for providing displacement movement which gives said loop assembly an oscillatory motion having a mechanical oscillation frequency along said displacement path, said mechanical oscillation frequency corresponding to said selected frequency, said rotary motion and said oscillatory motion providing in said loop assembly a raw amplitude-modulated output signal having an amplitude which is modulated as a function of the displacement of said loop assembly and a induced current frequency which is a function of the rotary motion, said induced current frequency being higher than said mechanical oscillation frequency;a signal processor for converting said raw output signal to an alternating current signal which has said mechanical oscillation frequency.