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環形變壓器如何安裝與設計?

發表時間:2021-04-19 18:00【 閱讀量:-查看手機網址
掃一掃!環形變壓器如何安裝與設計?掃一掃!

環形變壓器有3種安裝方式,1、環氧樹脂,中間用螺母固定。2、壓蓋+上膠墊+膠墊,用螺母固定。3、壓蓋+上膠墊+下膠墊+底座,用螺母固定。


無論是廣播功放還是專業功放里,環形變壓器都是是根據功放要求要設計的,如果需要低震動,降低噪聲的,有設計師會使用澆灌環氧樹脂,這時同樣可以選擇底座安裝或者壓蓋安裝。其他安裝方式只要固定好,接好線也沒什么特別要注意的地方,防水變壓器就主要注意絕緣問題。


環形變壓器環鐵芯的設計:


鐵芯截面:S=(12-6)×4.5=27(C㎡)取鐵芯導磁率10000高斯時,每伏匝數:N=45/S=45/27≈1.7(匝)初級220V匝數:220×1.7=374(匝)次級30V匝數:30×1.7×1.05≈54(匝)30V+30V:54匝+54匝(計算次級匝數時,考慮到變壓器的漏感、鐵損、銅損,故須增加5%余量)初級電流:I=P/U=400/220≈1.8(A)次級電流:I=P/U=400/(30+30)≈6.7(A)初級線徑:D=1.13×根號(I/δ)=1.13×根號(1.8/2.5)≈0.96(MM)(δ=電流密度,一般每平方取2.5A)次級線徑:D=1.13×根號(I/δ)=1.13×根號(6.7/2.5)≈1.85(MM)

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