THE MAGNETOSTRICTION FORCES IN THE INDUCTION-MOTOR

The paper describes how the classical formula of the Maxwell magnetic stress tensor may be extended to cover the magnetostriction phenomena. It is assumed that the ferromagnetic continuum is isotropic and conse rvative. The method takes into account the magnetic nonlinearity and i t assumes that mechanical deflections are sufficiently small to neglec t the nonlinearity of the Hooke's law. The paper presents also the exp erimental method, which has been used to measure the magnetostriction intensity for electrotechnical laminations. As the final result, the d istribution of the volume magnetostriction forces acting on the stator core of the induction motor has been calculated.