基于三級(jí)降噪技術(shù)的低噪聲環(huán)保型配電變壓器優(yōu)化設(shè)計(jì)
朱慶民，關(guān)銀環(huán)
(吳江變壓器有限公司，江蘇 蘇州 215200)
摘 要：配電變壓器運(yùn)行時(shí)產(chǎn)生的噪聲會(huì)對(duì)人居環(huán)境造成一定影響。以 S20-M-400/10-NX2 低噪聲環(huán)保型配電變壓器為研究對(duì)象，系統(tǒng)分析了配電變壓器噪聲產(chǎn)生的機(jī)理，包括鐵芯磁致伸縮效應(yīng)、硅鋼片接縫磁場(chǎng)畸變及結(jié)構(gòu)共振等關(guān)鍵因素。提出了“源頭降噪+路徑阻斷+終端吸收”的三級(jí)控制策略，試制產(chǎn)品實(shí)測(cè)噪聲聲功率級(jí) LWA,SN 為 37 dB(A)，為低噪聲配電變壓器的工程化設(shè)計(jì)提供了參考。
關(guān)鍵詞： 配電變壓器；鐵芯；低噪聲
中圖分類號(hào)：TM421 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1007-3175(2025)05-0045-04
Optimal Design of Low-Noise Environmentally Friendly Distribution
Transformers Based on Three-Tier Noise Reduction Technology
ZHU Qing-min, GUAN Yin-huan
（Wujiang Transformer Co., Ltd, Suzhou 215200, China）
Abstract: Noise generated by the operation of distribution transformers can adversely affect residential environments.This study focuses on the S20-M-400/10-NX2 low-noise environmentally friendly distribution transformer, systematically analyzing the mechanisms of distribution transformer noise generation. Key factors include magnetostriction effects in the iron core, magnetic field distortions at silicon steel lamination joints, and structural resonances. A three-tier control strategy is proposed, integrating “source noise reduction + propagation path blocking + terminal absorption”. Prototype testing demonstrates a measured sound power level LWA,SN of 37 dB(A), providing valuable references for the engineering design of low-noise distribution transformers.
Key words: distribution transformer; iron core; low-noise
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