Study on Vibration Characteristics of Metro Bogie with Permanent Magnet Synchronous Direct Drive Motor

In this paper, the vibration characteristics of a metro bogie directly driven by a permanent magnet synchronous motor are introduced. In a field test, by arranging acceleration sensors on the bogie and the car body to obtain the vibration signals of the various parts of the vehicle, the vibration of the motor and axle box during the operation of this type of bogie was acquired and analyzed, and the vibration transmission of the bogie was mastered in detail. Through the time/frequency domain analysis theory, the results demonstrate that the RMS of motor vibration acceleration increases with the increase of vehicle speed, and the main frequency of the motor is identical before and after the motor is removed. In addition, the traction rod seat has 6 characteristic frequencies, and each characteristic frequency exists at both root and end, while the energy amplitude at the end is larger. It can provide a certain technical reference for the application and further research of this bogie.