Bullet train converter noise reduction design method based on reactive noise elimination

A technology of resistant noise reduction and design method, applied in the field of rail transit, can solve the problems of large radiated noise of converters, large low-frequency noise, exceeding noise control requirements, etc., achieve effective noise reduction cost, reduce cabinet noise, improve quality effect

Inactive Publication Date: 2020-04-17
ZHUZHOU CSR TIMES ELECTRIC CO LTD
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  • Abstract
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Problems solved by technology

Studies have shown that when components such as the motor car converter fan work, they will generate relatively large low-frequency noise (between 100 and 300 Hz), resulting in excessive radiation noise from the converter suspended at the bottom of the car body, which exceeds the noise control requirements
At the same time, the low-frequency noise generated by converter fans and other equipment is usually difficult to eliminate substantially with sound-absorbing sponges

Method used

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  • Bullet train converter noise reduction design method based on reactive noise elimination
  • Bullet train converter noise reduction design method based on reactive noise elimination
  • Bullet train converter noise reduction design method based on reactive noise elimination

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Embodiment Construction

[0038] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the process of how to apply technical means to solve technical problems and achieve technical effects in the present invention. It should be noted that, as long as there is no conflict, each embodiment and each feature in each embodiment of the present invention can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.

[0039] Such as Figure 1~3 As shown, the noise reduction design method of the motor train converter based on the resistance noise elimination proposed by the present invention includes:

[0040] 1) Obtain the noise frequency and noise value of the converter 1;

[0041] 2) Determine the frequency of maximum resistance muffler;

[0042] 3) Determine the length of the expansion chamber 21 of the target resist...

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Abstract

The invention discloses a bullet train converter noise reduction design method based on reactive noise elimination. The method is characterized by comprising steps: 1) obtaining the noise frequency and the noise value of a converter, 2) determining the maximum reactive noise elimination frequency, 3) determining the length of an expansion chamber of the target reactive silencer according to the maximum reactive noise elimination frequency, and determining the expansion ratio of the target reactive silencer according to the noise elimination amount, and 4) determining the target reactive silencer according to the expansion ratio of the target reactive silencer and the length of the expansion chamber, and installing the target reactive silencer in the air duct of the converter. The method can effectively reduce the low and medium frequency noise generated by a fan, and realizes the active noise reduction of the converter.

Description

technical field [0001] The invention relates to a noise reduction design method for a motor vehicle converter based on resistance noise reduction, and belongs to the field of rail transit. Background technique [0002] The existing converters for rail transit vehicles are usually composed of electrical components such as converters, control boxes and transformers. However, due to the heavy weight of the transformer, and the alternating magnetostrictive force generated during the operation of the transformer will be transmitted to the converter cabinet, excessive vibration will seriously affect the performance of electrical components such as the converter and the control box. Fatigue life and structural strength of the converter cabinet. [0003] At present, the fixing method of the transformer in the converter cabinet is relatively simple. It is directly fixed on the converter cabinet by bolts, or a vibration damping pad is installed between the transformer and the convert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/33
CPCH01F27/33
Inventor 曾亚平丁杰王永胜朱宇龙夏亮陈俊彭宣霖臧晓斌李振鹏
Owner ZHUZHOU CSR TIMES ELECTRIC CO LTD
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