Nanocrystalline cores

• The magnetic properties of these cores can be adjusted over a fairly wide range depending on the treatment to which they are subjected, resulting in different forms of hysteresis curves. Most magnetic core values, including remanence (Br), coercive field (Hc), permeability (µ), but excluding saturation level (Bs), which is specific to the material, and is 1.23T, can be modified.

  Thus, basically, 3 types of hysteresis curves can be obtained:

  • Round loop (R): These have a remanence (Br/Bs) of around 50 %, an initial permeability greater than 100,000, and a maximum permeability greater than 500,000.
  • Rectangular loop (Z): These have an adjustable remanence that varies between 80 % and 98 %. In this case, initial permeability is low, around 5,000, but maximum permeability is above 650,000.
  • Flat-loop (F): These have a low remanence of between 3 % and 10 %, and maintain a constant permeability regardless of induction. This permeability value can be adjusted within a range of 30,000 to 100,000.

  

  FINISHING: Due to the fragility of the nano-crystalline material, the cores need a finish that ensures their integrity. At ELESA, we use epoxy paint and polyamide covers.

  MODELS: ELESA works with custom orders and can manufacture toroidal, rectangular and oblong cores of all sizes.

  

  

  These types of cores are used in a wide range of industries, including the aviation, railway, and automotive industries, electro medicine, energy and telecommunications.

  The following are a few of their most common uses:

  • They are used to eliminate noise common to the output of high-voltage batteries and frequency converters in industrial and automotive equipment.
  • They are also used as common mode chokes (CMC) for a wide range of EMI requirements.
  • They are also used as power converters for energy consumption measurement equipment such as differential switches (RCCB).