Automated software correction for integrator zero-point drift; utilizes the analog impulse method for high-accuracy measurement of the fundamental magnetization curve and hysteresis loop; includes a built-in demagnetization function.

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Magnetic Measurement Methods for Soft Magnetic Materials

1. Closed-Loop Samples

The sample, the primary magnetization coil ($\text{N}1$), and the measurement coil ($\text{N}2$) are assembled to form an open-core transformer structure. This setup allows for the measurement of samples with closed magnetic circuits, including ring, rectangle, CD-shape, EE-shape, UU-shape, PQ-shape, etc.

• Idealization of Ring Sample: The demagnetization factor for the ring sample is zero. The magnetic field lines are concentrated entirely within the magnetic ring, meaning the external field equals the internal field, making it an ideal geometry for measuring the magnetic properties of soft magnetic materials.

2. Open-Loop Samples

Note: Accessories such as solenoids, Gaussmeters, or Epstein frames must be selected for this setup.

2.1. Solenoid

A solenoid is composed of a wire wound around a cylindrical insulating core, capable of generating a large, uniform magnetic field in the axial direction. The test sample is magnetized within this uniform and unidirectional field. Note: The magnetization of open-loop samples must overcome the demagnetizing field HN. The demagnetization factor N is dependent on the sample's shape and geometry and is not constant.

• Applications: Solenoids can measure bar, rod, and sheet-shaped samples. The sample is required to have an aspect ratio (length to diameter) greater than 20:1.

2.2. A-Type Gaussmeter

The Gaussmeter is a magnetization device used to measure magnetic properties of open-loop soft magnetic samples, such as electrical pure iron, Fe-Co alloys, and magnetic stainless steel. It consists of a yoke, an excitation coil, and pole shoes. During measurement, the test sample is placed within the Gaussmeter and forms a closed magnetic circuit with the yoke.

2.3. Epstein Frame (Core)

The Epstein frame is a magnetization device used for measuring the magnetic properties of electrical steel strip. It consists of four coils and an air flux compensation coil. Each of the four coils contains both a primary magnetization winding and a secondary induction winding. During testing, the primary winding, the secondary winding, and the electrical steel strip serving as the core are assembled to form an open-core transformer.