Vibration Analysis of Permanent Magnet Motor (TR or DP+DS)

	Trial Version
	Video Tutorials

Coupled Magnetic Field and Structural Analysis

Figure 1 - Time history of electromagnetic force at each node

One of the major problems in motor design is controlling vibration and noise. JMAG provides a module for vibration analysis. Displacement and stress can be determined using a structural analysis based on the nodal force calculated from a magnetic field analysis. This example shows the vibration analysis of a permanent magnet motor. The load curve for the vibration frequency response analysis is created using a frequency analysis at each node with the time series data (See Figure 1) obtained from magnetic field calculations (See Figure 2). JMAG performs this conversion automatically. JMAG can also perform an eigenmode analysis. Figure 3 shows the results. The frequency response of the displacement of the stator surface, which is obtained from the frequency response analysis conducted using the results and the above load curve, is shown in Figure 4.

Figure1-1 Enlarged View	Figure1-2 Enlarged View	Figure1-3 Enlarged View

Figure 2 - Resolving the time history of electromagnetic force into frequency components using fast Fourier transformation (FFT).

Figure2-1 Enlarged View	Figure2-2 Enlarged View	Figure2-3 Enlarged View

Figure 3 - Eigenmode analysis Enlarged View	Figure 4 - Frequency response of the displacement of the stator surface Enlarged View