ASTM A927/A927M-04被替代
Standard Test Method for Alternating-Current Magnetic Properties of Toroidal Core Specimens Using the Voltmeter-Ammeter-Wattmeter Method
出版：American Society for Testing and Materials
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基本信息
标准编号： ASTM A927/A927M-04
发布时间：2004/10/1 0:00:00
标准类别：Standard
出版单位：American Society for Testing and Materials
标准页数：5
标准简介
CONTAINED IN VOL. 03.04, 2005Covers the determination of several ac magnetic properties of either laminated ring or toroidal tape wound cores made from flat rolled product. Covers test equipment and procedures for determination of specific core loss, specific exciting power, and peak permeability for power and audio frequencies (50 to 20,000 Hz) under sinusoidal flux conditions.
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