POWDER CORE, POWDER CORE MANUFACTURING METHOD, AND METHOD FOR ESTIMATING EDDY CURRENT LOSS IN POWDER CORE

An eddy current loss at a frequency of 3,000 Hz is set to less than 150 W/kg by setting a single particle diameter-equivalent diameter d s of soft magnetic metal powder represented by the following formula to 210 µm or less. In the formula, d s represents a single particle diameter-equivalent diamet...

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Bibliographische Detailangaben
Hauptverfasser:	SHIMAZU, EIICHIRUO, MUNEDA, NORIKAZU, ARAKI, HIKARU
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BASIC ELECTRIC ELEMENTS CASTING ELECTRICITY INDUCTANCES MAGNETS MAKING METALLIC POWDER MANUFACTURE OF ARTICLES FROM METALLIC POWDER PERFORMING OPERATIONS POWDER METALLURGY SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES TRANSFORMERS TRANSPORTING WORKING METALLIC POWDER
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Beschreibung
Zusammenfassung:	An eddy current loss at a frequency of 3,000 Hz is set to less than 150 W/kg by setting a single particle diameter-equivalent diameter d s of soft magnetic metal powder represented by the following formula to 210 µm or less. In the formula, d s represents a single particle diameter-equivalent diameter of the soft magnetic metal powder [m], d MN represents a number average particle diameter of the soft magnetic metal powder [m], and Ã represents a standard deviation of the particle diameter of the soft magnetic metal powder [m]. d S = d M N 2 + 5 ¢ Ã 2 + 2 ¢ Ã 2 ¢ d M N 2 d M N 2 + 3 ¢ Ã 2