MAGNETOSTRICTION ANALYSIS APPARATUS AND METHOD, MAGNETOSTRICTION MEASUREMENT APPARATUS AND METHOD, COMPUTER PROGRAM, AND COMPUTER-READABLE RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To determine magnetostriction occurring in an iron core excited by AC by calculations to estimate noise occurring in an apparatus using the iron core at the designing stage of the apparatus.;SOLUTION: Predetermined elliptic magnetic flux is applied to a sample 31, to which strain gauges 32 to 34 are attached, to measure a strain ratio. Using the measured strain ratio, a strain tensor E is calculated. A maximum strain ratio λ_MAX is determined from eigenvalues eig1 and eig2 of the calculated strain tensor E. The determined maximum strain ratio λ_MAX and the elliptic magnetic flux producing the maximum strain ratio λ_MAX are related with each other to be stored in a magnetostriction characteristics database 4a. Magnetic characteristics obtained by magnetic characteristics analysis and the maximum strain ratio λ_MAX, an indicator for estimating noise, are thereby related with each other to determine the maximum strain ratio λ_MAX occurring in the iron core, an object to be analyzed, on the basis of analysis results by the magnetic characteristics analysis.;COPYRIGHT: (C)2005,JPO&NCIPI