PC-based apparatus for characterising high frequency magnetic cores

Author

Wang, S.-C. ; Chen, C.-L.

Author_Institution

Dept. of Electr. Eng., Kuang Wu Inst. of Technol. & Commerce, Taipei, Taiwan

Volume

146

Issue

6

fYear

1999

fDate

11/1/1999 12:00:00 AM

Firstpage

304

Lastpage

308

Abstract

A PC-based automatic characterisation system (ACS) has been developed to automatically characterise magnetic materials under square wave cyclic excitation from 1 kHz to 100 kHz. A computer-controlled AC to AC converter has been developed for the excitation circuit. A digital oscilloscope gathers the required data through the 8255 interface card. The errors in the ACS have been analysed and overall repeatability is better than ±0.35%. The system has the advantages of ease of use, absence of long-term measuring system drifts and ready variation of high induction and high frequency test parameters. The system operates automatically and measurements on three commercial core materials are reported. Comparisons with the data of manufacturers are included

Keywords

AC-AC power convertors; computerised instrumentation; digital storage oscilloscopes; eddy current losses; magnetic cores; magnetic hysteresis; magnetic variables measurement; measurement systems; 1 to 100 kHz; 8255 interface card; DAC; PC-based apparatus; PWM inverter; automatic characterisation system; computer-controlled AC-AC converter; core loss; digital oscilloscope; eddy current loss; high frequency magnetic cores; high level induction; hysteresis loop; magnetic flux density; repeatability; software features; square wave cyclic excitation;

fLanguage

English

Journal_Title

Science, Measurement and Technology, IEE Proceedings -

Publisher

iet

ISSN

1350-2344

Type

jour

DOI

10.1049/ip-smt:19990527

Filename

815889