Research on vibration characteristics of permanent magnetic motor on wind turbine fully integrated transmission system
Aiming at the problem of excessive vibration issue on the permanent magnetic motor housing of fully integrated transmission system of wind turbine,taking the permanent magnetic motor of fully integrated transmission system as the research object,the vibration signals at different measurement position at different speed have been analyzed to find the reason of vibration issue.Firstly,the data acquisition system of generator vibration test is built to collect the acceleration signals of the corresponding measurement points under different rotational speeds Then,based on spectrum analysis method to find the excitation spectrum and calculate Root-Mean-Square value of the measurement points about the vibration signals.Finally,though the vibration energy,vibration spectrum at deceleration process under power-off and modal analysis of housing to find the reasons of excessive vibration issue.The research result shows that:Based on the spectrum analysis of vibration signal and modal analysis of housing,the reason is caused by the structure of the housing and manufacture method,the local natural frequency has been excited,but the modal participation factor of relevant frequency is quite low,the vibration energy is small and it can't lead to whole vibration issue,and the excitation frequency is the motor gear frequency and modulation frequency of converter switching frequency.
wind turbinepermanent magnetic motornatural frequencylocal resonance signal processing
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