B-H Hysteresis Loop Tester

The B-H hysteresis loop test instrument is integrated and uses samples of the same material but different properties.
Instrument Components: The instrument consists of a black box (with a built-in autotransformer), a standard resistor, a sampling resistor, an integrating resistor, an integrating capacitor, sample 1, sample 2, an AC ammeter, and an AC voltmeter.

Experimental Objectives

1. Master the concepts of magnetic hysteresis, hysteresis loops, and magnetization curves, and deepen understanding of the key physical quantities of ferromagnetic materials: coercivity, remanence, and permeability;
2. Learn to use an oscilloscope to plot basic magnetization curves and hysteresis loops;
3. Determine the saturation magnetic induction, remanence, and coercivity of a magnetic material based on the hysteresis loop;
4. Observe the changes in the hysteresis loops of samples of the same material with and without orientation by changing the sample.

Specifications of B-H Hysteresis Loop Tester

Sampling resistor:                                            20Ω
Integrating resistor:                                         47KΩ
Integrating capacitor:                                      4.7uF
Sample 1 (non-oriented silicon steel sheet): Primary coil: 100 turns, Secondary coil: 100 turns
Sample 2 (oriented silicon steel sheet):         Primary coil: 200 turns, Secondary coil: 300 turns