Significance and Use
This test method is designed for testing of either toroidal or mated soft magnetic core components over a range of temperatures, frequencies, and flux densities.
The reproducibility and repeatability of this test method are such that it is suitable for design, specification acceptance, service evaluation, and research and development.
1.1 This test method covers the equipment, procedures, and measurement of core loss of either toroidal or mated soft magnetic core components, such as soft ferrite cores, iron powder cores, and so forth, over ranges of controlled ambient temperatures typically from 20 to +120C, frequencies from 10 kHz to 1 MHz, under sinusoidal flux conditions.
1.2 The values and equations stated in customary (cgs-emu and inch-pound) of SI units are to be regarded separately as standard. Within this test method, SI units are shown in brackets except for the sections concerning calculations where there are separate sections for the respective unit systems. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with this standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A34/A34M Practice for Sampling and Procurement Testing of Magnetic Materials
A340 Terminology of Symbols and Definitions Relating to Magnetic Testing
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
alternating current; core; core loss; core test; ferrite core; high frequency; magnetic material; magnetic test; sinusoidal; soft ferrite; volt-amp-watt;
ICS Number Code 29.100.10 (Magnetic components)
ASTM International is a member of CrossRef.
Citing ASTM Standards
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