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- Epstein_frame abstract "An Epstein frame or Epstein square is a standardised measurement device for measuring the magnetic properties of soft magnetic materials, especially used for testing of electrical steels.In Europe, the measurement configuration and conditions are defined by a standard: IEC 60404-2:1996 Magnetic materials - Part 2: Methods of measurement of the magnetic properties of electrical steel sheet and strip by means of an Epstein frame. BS EN 60404-2:1998+A1 contains an updated version of IEC 60404-2.An Epstein frame comprises a primary and a secondary winding. The sample under test should be prepared as a set of a number of strips (always a multiple of four) cut from electrical steel sheet or ribbon. Each layer of the sample is double-lapped in corners and weighted down with a force of 1 N (see photo). The power losses are measured by means of a wattmeter method in which the primary current and secondary voltage are used. During the measurement, the Epstein frame behaves as an unloaded transformer.Power loss, Pc, is calculated as:where:is the number of turns of primary windingis the number of turns of secondary windingis the reading of the wattmeter in wattsis the total resistance of the instruments in the secondary circuit in ohms andis the average secondary voltage in volts.Specific power loss, Ps, is calculated as:where:is the length of the sample in metresis the average magnetic path length = 0.94 (constant value)is the mass of the sample in kilogramsIf all conditions are as defined in the standard, the standard deviation of the reproducibility of the values is not greater than 1.5% up to 1.5 T for non-oriented electrical steel and up to 1.7 T for grain-oriented electrical steel.".
- Epstein_frame thumbnail Epstein_frame.jpg?width=300.
- Epstein_frame wikiPageID "13666570".
- Epstein_frame wikiPageRevisionID "578678338".
- Epstein_frame date "October 2013".
- Epstein_frame hasPhotoCollection Epstein_frame.
- Epstein_frame reason "explain abbreviation".
- Epstein_frame subject Category:Magnetism.
- Epstein_frame comment "An Epstein frame or Epstein square is a standardised measurement device for measuring the magnetic properties of soft magnetic materials, especially used for testing of electrical steels.In Europe, the measurement configuration and conditions are defined by a standard: IEC 60404-2:1996 Magnetic materials - Part 2: Methods of measurement of the magnetic properties of electrical steel sheet and strip by means of an Epstein frame.".
- Epstein_frame label "Aparat Epsteina".
- Epstein_frame label "Epstein frame".
- Epstein_frame label "Epsteinrahmen".
- Epstein_frame sameAs Epsteinrahmen.
- Epstein_frame sameAs Aparat_Epsteina.
- Epstein_frame sameAs m.03cdk14.
- Epstein_frame sameAs Q132252.
- Epstein_frame sameAs Q132252.
- Epstein_frame wasDerivedFrom Epstein_frame?oldid=578678338.
- Epstein_frame depiction Epstein_frame.jpg.
- Epstein_frame isPrimaryTopicOf Epstein_frame.
