Introduction

FERRITE IMPEDER CORE

Ferrite Impeder Cores are used for concentration of magnetic flux in high frequency, RF, induction welding of steel tubes and pipes. In this application ferrite core experience temperature up to 150°C and the core properties must be optimised for this environment. Properties which influence the efficiency and the speed of the process are:

  1. A high permeability (u) material to ensure high degree of magnetic flux concentration.
  2. A high saturation flux density Bs, at the working temperature, which determines, the maximum field in which the ferrite core can usually perform.
  3. A high curie temperature at which the material ceased to concentrate magnetic flux, due to loss of ferrimagnetic properties.

 

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