Table 1: The vibration frequency spectrum component analysis of outer rotor.

Frequency (Hz)Component

19.53
109.9
130.6
140.4
150.1
159.9
179.4
200.2
219.7
230.7
250.2
269.2
290.5
319.5
339.4
360.1
379.6
410.2
429.2
450.1
470
500
520
590.8