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Eccentricity of Radial Flux Machines simulated in 2D and 3D FE simulations

PRESENTER:
Karsten Mueller

EXPERTISE:
Electromagnetics

Software:
JMAG

Since the noise emitted by an electrical machine due to high frequency pure tones has an important influence on the Noise Vibration Harshness (NVH) behaviour of a vehicle, it is necessary to determine possible fault patterns.

Static and dynamic eccentricities due to misalignment are common fault patterns.

For this purpose, electromagnetic simulations using the Maxwell Stress Tensor (MST) to determine radial forces are executed.

These forces are analyzed and compared regarding different skewing configuration and skewing angle in 2D and 3D finite-element (FE) simulations.

The 3D FE simulations show that axial forces occur at the transition points between the magnetic segments of a linear step skewed rotor.

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