In-circuit measurement of saturation flux density Bsat,...

Details In-circuit measurement of saturation flux density Bsat,... In-circuit measurement of saturation flux density Bsat,...

2007-05-22

2007-05-22

Assouad, Patrick J. (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Electrical signal parameter measurement system

C324S200000, C324S600000

Reexamination Certificate

active

10943602

ABSTRACT:
An oscilloscope performs an in-circuit measurement of voltage across, and current through, a core winding of an inductor, and derives the actual B and H values with n number of turns, receives data indicative of the magnetic length of the circuit, and plots the B_H curve. The oscilloscope then derives the value of Saturation flux density (Bsat), Remnant flux density (Br), Permeability (μ), and Coercivity (Hc) from this B-H plot. Characterizing the operating region of the magnetic component while it operates in a Switch Mode Power Supply (SMPS) under test, provides information concerning the stability of the power supply that was heretofore unavailable.

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