Hysteresis of a iron-core toroid.

5G40.10C | Cb4
Catalog: 
5G40.10C
Location: 
Cb4
Room: 
PS F175
Quantity: 
0
  • Hysteresis trace on a oscilloscope.
    Hysteresis trace on a oscilloscope.
  • Sargent-Welch toroid.
    Sargent-Welch toroid.
  • Circuit components.
    Circuit components.
  • Oscilloscope displaying hysteresis curve. Note, that the negative inputs are not
    Oscilloscope displaying hysteresis curve. Note, that the negative inputs are not used.
  • Circuit schematic. Values do not have to be exact.
    Circuit schematic. Values do not have to be exact.
Description: 

The Sargent-Welch toroid is used to show a typical hysteresis curve of an inductor/transformer with a ferromagnetic core. When setting this demo up follow the schematic shown, however, values do not need to be exact in order to achieve very good results. This demo also works well with a broad range of frequencies (saw tooth signals are best), just adjust R3 to achieve the desired trace pattern.

Purpose: 
This demo shows that magnetization curves for ferromagnetic materials do not retrace themselves when the current in the toroid is varying with time.