Diagnosis is suggested to conduct on the basis of spectral analysis of functions of tensor magnetic stress tensor using fast Fourier transform (FFT).

Vibration disturbing forces density is proportional to the magnetic stress tensor that has the physical dimension of the pressure (N/[m.

Further deals radial vibration occurring by the action of the normal component of the magnetic stress tensor.

2) by the expression (7) is calculated normal component of magnetic stress tensor (MST) as the value of the acceleration is proportional to value of the magnetic disturbing force.

4, respectively, in these three points on the crowns of teeth of the stator depicted settlement functions of the magnetic stress tensor over time in the presence of SE and DE (for [epsilon] = 0.

Amplitudes of magnetic stress tensor vs eccentricity factor

This is based either on the large deformation achievable in magnetic fields even of a moderate intensity, or on the inverse effect, where tensile or compressible strains sufficiently charge the magnetic permeability of these materials, hence enabling

magnetic stress and strain tensors.