Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Magnetic saturation
Patent
1992-02-10
1993-01-19
Nguyen, Vinh
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Magnetic saturation
324117R, 324251, 307309, G01R 3300
Patent
active
051809702
ABSTRACT:
A current sensor is provided with a flux concentrator which is made of two or more annular laminae. The laminae, or lamina plate, each are provided with a gap formed in its circumferential length. Each lamina has a gap which is defined by two opposing faces. The laminae are stacked with their planar surfaces in contact and in such a way so as to define a central opening. The gaps of the laminae are arranged proximate each other. One lamina is rotated relative to another to change the width of the effective gap by misalign the faces of the one gap relative to another. The lamina is rotated during the manufacture of the current sensor while an output voltage signal is measured as a function of a current passing through an opening of the flux concentrator. The degree of rotation of the lamina is determined as a function of the output signal to achieve a preselected current/voltage relationship. By achieving a consistent relationship between current sensors made in accordance with the present invention, interchangeability from one current sensor to another can be achieved in a low costs current sensor.
REFERENCES:
patent: 3194939 (1965-07-01), Hill
patent: 4059798 (1977-11-01), Dierker et al.
patent: 4682101 (1987-07-01), Cattaneo
patent: 4761960 (1988-08-01), Higham et al.
Honeywell Inc.
Lanyi William D.
Nguyen Vinh
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