Experimental Study on Vibration Characteristics of Traction Transformer for High-speed EMU
In order to investigate the vibration characteristics of traction transformer for high-speed EMU under the electromechanics coupling effect, the vibration mechanisms of core and windings of the traction transformer were analyzed. Based on the field vibration test of high-speed EMU, the vibration acc...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Department of Electric Drive for Locomotives
2021-07-01
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| Series: | 机车电传动 |
| Subjects: | |
| Online Access: | http://edl.csrzic.com/thesisDetails#10.13890/j.issn.1000-128x.2021.04.014 |
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| Summary: | In order to investigate the vibration characteristics of traction transformer for high-speed EMU under the electromechanics coupling effect, the vibration mechanisms of core and windings of the traction transformer were analyzed. Based on the field vibration test of high-speed EMU, the vibration acceleration amplitude and frequency distribution of traction transformer were studied, considering stopping, acceleration, constant speed and passing through the neutral zone. Besides, the influence of cooling fan and the effect of traction transformer on car body and riding quality were investigated. Research results show that when the traction transformer is working normally, the vibration energy is mainly concentrated in 200 Hz and 300 Hz. The vibration energy caused by the car body and the cooling fan is a relatively small percentage. These conclusions are consistent with the theoretical analysis results. During passing through the neutral zone, lateral acceleration RMS of traction transformer is only 7% of lateral acceleration RMS during the operation of traction transformer. In the frequency domain, there are the vibration components of 24.6 Hz and second harmonic generation in vertical acceleration of traction transformer caused by cooling fan. The acceleration values of the car body underframe which is affected by traction transformer increases by 20%, which deteriorates the vehicle running stability. |
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| ISSN: | 1000-128X |