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造成高頻變壓器異響原因分??/h3>
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<span>文章出處??a href=""><a >深圳市晨飛電子有限公??/a></a></span><span>網(wǎng)責(zé)任編輯：<a >NSW</a></span><span>作者：<a >NSW</a></span><span>人氣??span
id="cntrHits">-</span></span><span>發(fā)表時間??013-09-10 15:16:00</span>
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<p> <strong><a href="http://linhang.com.cn/product/product-0001,0015-1.shtml">高頻變壓??/a></strong>在運(yùn)行的過程中有時會發(fā)出噪聲,產(chǎn)生這樣的原因之一就是冷卻器。主要是因為風(fēng)扇會產(chǎn)生噪聲，人耳對這種寬帶諧波當(dāng)然比對鐵心頻率產(chǎn)生的諧波敏感。主導(dǎo)頻率取決于多種因素，包括風(fēng)扇速度，葉片數(shù)和葉片外形。聲功率級取決于風(fēng)扇的數(shù)量以及轉(zhuǎn)速。與高頻變壓器本體噪聲的機(jī)理一樣，冷卻裝置的噪聲也是由于它們的振動而產(chǎn)生的，其振動的根源在于：</p>
<p> 1.冷卻風(fēng)扇和油泵在運(yùn)行時產(chǎn)生的振動;</p>
<p> 2.高頻變壓器本體的振動通過絕緣油、管接頭及其裝配零件傳遞給冷卻裝置，使冷卻裝置的振動加劇，噪聲加大。另外，當(dāng)鐵心加熱以后，由于諧振頻率和機(jī)械應(yīng)力的變化，其噪聲會隨溫度的升高而增大。而運(yùn)行現(xiàn)場的環(huán)境（如周圍的墻壁、建筑物及安裝基礎(chǔ)等）對噪聲也有影響。對許多強(qiáng)風(fēng)冷卻變壓器來說，冷卻器風(fēng)扇是比變壓器本身更明顯的噪聲源??/p>
<p> 從高頻變壓器制造工藝上分析，主要有下列幾個方面??/p>
<p> 1.變壓器工作磁密選的太高,接近飽和,漏磁太大,產(chǎn)生噪音;</p>
<p> 2.鐵心的材質(zhì)太??損耗太??產(chǎn)生噪音;</p>
<p> 3.工作回路中諧波含量、直流分量也會導(dǎo)致鐵心甚至線圈的噪音產(chǎn)生;</p>
<p> 4.變壓器的制作工藝??/p>
<p> a.線圈繞制太松;</p>
<p> b.線圈和鐵心之間固定不牢固;</p>
<p> c.鐵心固定不牢??</p>
<p> d.EI之間存在氣隙，工作時產(chǎn)生“蜂鳴”;</p>
<p> e.E型鐵心外部的2片硅鋼片的舍部，處理不好的話，極易產(chǎn)生噪??</p>
<p> f.浸漆工藝處理：絕緣漆的粘度控??</p>
<p> g.變壓器外部金??導(dǎo)磁??結(jié)構(gòu)件固定不牢固;</p>
<p> 5.如果是高壓的產(chǎn)品,絕緣處理不好的話,也會有噪音??br />
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