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ASTM A932/A932M-01(2012)
Standard Test Method for Alternating-Current Magnetic Properties of Amorphous Materials at Power Frequencies Using Wattmeter-Ammeter-Voltmeter Method with Sheet Specimens
STANDARD published on 1.5.2012
The information about the standard:
Designation standards: ASTM A932/A932M-01(2012)
Note: WITHDRAWN
Publication date standards: 1.5.2012
SKU: NS-4873
The number of pages: 13
Approximate weight : 39 g (0.09 lbs)
Country: American technical standard
Category: Technical standards ASTM
The category - similar standards:
Annotation of standard text ASTM A932/A932M-01(2012) :
Keywords:
ac, ammeter, amorphous, anneal, core loss, exciting power, form factor, magnetic, peak, permeability, sheet, specific, voltmeter, wattmeter, waveform, yoke, ICS Number Code 17.220.20 (Measurement of electrical and magnetic quantities)
Additional information
| Significance and Use | ||||||||||||
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4.1 This test method provides a satisfactory means of determining various ac magnetic properties of amorphous magnetic materials. It was developed to supplement the testing of toroidal and Epstein specimens. For testing toroidal specimens of amorphous materials, refer to Test Method A912/A912M. 4.2 The procedures described herein are suitable for use by manufacturers and users of amorphous magnetic materials for materials specification acceptance and manufacturing control. 1.1 This test method covers tests
for various magnetic properties of flat-cast amorphous magnetic
materials at power frequencies (50 and 60 Hz) using sheet-type
specimens in a yoke-type test fixture. It provides for testing
using either single- or multiple-layer specimens.
1.2 This test method provides a test
for specific core loss, specific exciting power and ac peak
permeability at moderate and high flux densities, but is restricted
to very soft magnetic materials with dc coercivities of 0.07 Oe
[5.57 A/m] or less.
1.3 The test method also provides procedures for calculating ac peak permeability from measured peak values of total exciting currents at magnetic field strengths up to about 2 Oe [159 A/m]. 1.4 Explanation of symbols and abbreviated definitions appear in the text of this test method. The official symbols and definitions are listed in Terminology A340. 1.5 This test method shall be used in conjunction with Practice A34/A34M. 1.6 The values stated in either customary (cgs-emu and inch-pound) or SI units are to be regarded separately as standard. Within this standard, SI units are shown in brackets. 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. 1.7 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. |
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