270
L. Yang et al.
21.5 Conclusions
The vibration characteristics of a metro bogie directly driven by a permanent magnet
synchronous motor are demonstrated through field test, which can be concluded as
follows:
For motor, with the increase of vehicle speed, the RMS of motor vibration acceleration increases gradually, from low speed to high speed by about 2–4 times. The
RMS value of vibration acceleration decreased by about 20% after the motor is
removed. Before and after the motor is removed, the main frequency of vibration
remains unchanged, both at 45 Hz and 65 Hz, of which 60–70 Hz is the P2 force
frequency of the motor.
For axle box, as the speed increases, the vibration amplitudes in the three directions
of the axle box continue to increase. After the motor is removed, the RMS of the
axle box vibration acceleration increases slightly, but the increase is small, with
a maximum of about 20%. For the vibration frequency of the axle box, the main
frequency of the motor is the same before and after the motor is removed, but the
energy that related to the main frequency is slightly different.
For the vibration transmission of the bogie, the 60–70 Hz and 125 Hz main
frequency of the axle box are transmitted to the frame. In addition, the frame has
400 Hz and 800 Hz natural frequency bands. The main frequency of the vehicle
body is the suspension modal frequency within 3 Hz, and the vertical mode of the
vehicle body is more obvious. In both normal motor and motor removal conditions,
the vibration of the root-end of the traction rod seat is amplified. The traction rod
seat has 6 characteristic frequencies, each characteristic frequency exists at both root
and end, and the energy amplitude at the end is larger.
References
1. Yuan, Z.Q., Nie, M.: Development of high-power permanent magnet direct drive passenger
locomotive. Electr. Drive Locomot. (01), 40-44 + 50 (2019)
2. Chen, G.S., Xiao, T., Chen, X.H., Gong, X.B., Lu, Z.G., Wang, W.B.: Some key technology
problems for independent-wheel and hub direct driving bogie with permanent magnet motor.
Electr. Drive Locomot. 05, 4–7 (2016)
3. Liu, Q.A., Zhang, J., Zhong, W.S.: The influence of balancing link tilt angle on motor motion
and primary load of bogies with permanent magnet driven directly. Electr. Drive Locomot. 02,
37–39 (2015)
4. Zhang, J., Zhong, W.S., Liu, G.K.: General description of the development of the direct-drive
technology of permanent magnet synchronous motor of bogie at home and abroad. Railw.
Locomot. Car 34(03), 79–83 (2014)
5. Feng, Z.W., Hu, D.X., Chu, Y.P.: Research on dynamic performance of direct-driven flexible
bogie for permanent-magnetic synchronous motor. Railw. Locomot. Car 33(03), 73–76 (2013)
6. Chu, Y.P., Hu, D.X., Zhou, L.: Design and analysis of a new-type metro bogie with permanent
magnet driving motors. Urban Mass Transit 19(06), 17-21 + 27 (2016)
7. Zhang, Z.H., Li, H.X., Li, Q., Zhao, Q.H.: The locomotive bogie with permanent-magnet motor
and direct driving pattern. Railw. Locomot. Car 40(03), 39–42 (2020)
L. Yang et al.
21.5 Conclusions
The vibration characteristics of a metro bogie directly driven by a permanent magnet
synchronous motor are demonstrated through field test, which can be concluded as
follows:
For motor, with the increase of vehicle speed, the RMS of motor vibration acceleration increases gradually, from low speed to high speed by about 2–4 times. The
RMS value of vibration acceleration decreased by about 20% after the motor is
removed. Before and after the motor is removed, the main frequency of vibration
remains unchanged, both at 45 Hz and 65 Hz, of which 60–70 Hz is the P2 force
frequency of the motor.
For axle box, as the speed increases, the vibration amplitudes in the three directions
of the axle box continue to increase. After the motor is removed, the RMS of the
axle box vibration acceleration increases slightly, but the increase is small, with
a maximum of about 20%. For the vibration frequency of the axle box, the main
frequency of the motor is the same before and after the motor is removed, but the
energy that related to the main frequency is slightly different.
For the vibration transmission of the bogie, the 60–70 Hz and 125 Hz main
frequency of the axle box are transmitted to the frame. In addition, the frame has
400 Hz and 800 Hz natural frequency bands. The main frequency of the vehicle
body is the suspension modal frequency within 3 Hz, and the vertical mode of the
vehicle body is more obvious. In both normal motor and motor removal conditions,
the vibration of the root-end of the traction rod seat is amplified. The traction rod
seat has 6 characteristic frequencies, each characteristic frequency exists at both root
and end, and the energy amplitude at the end is larger.
References
1. Yuan, Z.Q., Nie, M.: Development of high-power permanent magnet direct drive passenger
locomotive. Electr. Drive Locomot. (01), 40-44 + 50 (2019)
2. Chen, G.S., Xiao, T., Chen, X.H., Gong, X.B., Lu, Z.G., Wang, W.B.: Some key technology
problems for independent-wheel and hub direct driving bogie with permanent magnet motor.
Electr. Drive Locomot. 05, 4–7 (2016)
3. Liu, Q.A., Zhang, J., Zhong, W.S.: The influence of balancing link tilt angle on motor motion
and primary load of bogies with permanent magnet driven directly. Electr. Drive Locomot. 02,
37–39 (2015)
4. Zhang, J., Zhong, W.S., Liu, G.K.: General description of the development of the direct-drive
technology of permanent magnet synchronous motor of bogie at home and abroad. Railw.
Locomot. Car 34(03), 79–83 (2014)
5. Feng, Z.W., Hu, D.X., Chu, Y.P.: Research on dynamic performance of direct-driven flexible
bogie for permanent-magnetic synchronous motor. Railw. Locomot. Car 33(03), 73–76 (2013)
6. Chu, Y.P., Hu, D.X., Zhou, L.: Design and analysis of a new-type metro bogie with permanent
magnet driving motors. Urban Mass Transit 19(06), 17-21 + 27 (2016)
7. Zhang, Z.H., Li, H.X., Li, Q., Zhao, Q.H.: The locomotive bogie with permanent-magnet motor
and direct driving pattern. Railw. Locomot. Car 40(03), 39–42 (2020)