Standard Test Method for Direct Current Magnetic Properties of Low Coercivity Magnetic Materials Using Hysteresigraphs

Importancia y uso:

5.1 Hysteresigraphs permit more rapid and efficient collection of data as compared to the point by point ballistic Test Methods A341/A341M and A596/A596M. The high measurement point density offered by computer-automated systems is often required for computer aided design of electrical components such as transformers, motors, and relays.

5.2 Hysteresigraphs are particularly desirable for testing of semi-hard and hard magnetic materials, where either the entire second quadrant (demagnetization curve) or entire hysteresis loop is of primary concern. Test Method A977/A977M describes the special requirements for accurate measurement of hard magnetic (permanent magnet) materials.

5.3 Hysteresigraphs are not recommended for measurement of initial permeability, µ_i, of materials with high magnetic permeability such as nickel-iron, amorphous, and nanocrystalline materials due to errors associated with integrator drift; in these cases, Test Method A596/A596M is a more appropriate method.

5.4 Provided the test specimen is representative of the bulk sample or lot, this test method is well suited for design, specification acceptance, service evaluation, and research and development.

Subcomité:

A06.01

Referida por:

B0925-15R22, A1126-23, A0753-21, A0848-17, A0838-24, A0839-15R23, A0867-24, A0904-20, A0811-15R22, A0469_A0469M-07R22, A0345-19, A0901-19, A0801-21, A0596_A0596M-21

Volúmen:

03.07

Número ICS:

29.030 (Magnetic materials)

Palabras clave:

dc hysteresigraph; hysteresis; Epstein test; Hall probe; hysteresis loop; permeameter; ring-type specimen;