Magnet (unidirectional): linear approximation, linear function of T


This model defines remanent flux density (Br) as a linear function of the temperature for a magnet with an isotropic permeability.

Mathematical model

Remanent flux density is a linear function of the temperature.

The corresponding mathematical formula is written:

Br(T) = Brref * (1 + a * (T - Tref ))


  • T ref is the reference temperature degree or Kelvin
  • Br ref is the remanent induction of the magnet at Tref Tesla
  • a is a reverse temperature coefficient for the remanent induction Br (degree-1 )

The shape of Br (T) curve is presented in the figure below.