扇形導(dǎo)體緊壓高度計(jì)算
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<IFRAME style="POSITION: absolute; TOP: 0px; LEFT: 0px" id=aswift_2 onload="var i=this.id,s=window.google_iframe_oncopy,H=s&&s.handlers,h=H&&H,w=this.contentWindow,d;try{d=w.document}catch(e){}if(h&&d&&(!d.body||!d.body.firstChild)){if(h.call){i+='.call';setTimeout(h,0)}else if(h.match){i+='.nav';w.location.replace(h)}s.log&&s.log.push(i)}" height=200 marginHeight=0 frameBorder=0 width=200 allowTransparency name=aswift_2 marginWidth=0 scrolling=no></IFRAME></DIV>扇型緊壓截面如何計(jì)算扇型高度
α ——線芯截面中心與側(cè)邊的夾角
t ——絕緣厚度
S——線芯截面積
R——半徑
h ——高度
PI=3.14159265
^后面的是上標(biāo),指數(shù)
1.半圓形(2α=180度)
S=0.5*PI*R^2-2tR+t^3/(3R)
R=0.64[t+(1.57S+0.84t^2)^1/2]
h=R-t=0.64*(1.57S+0.84t^2)^1/2-0.36t
2.三芯(2α=120度)
S=(PI/3)*R^2-2tR+t^2/1.732+t^3/(3R)
R=0.955[t+(1.05S+0.36t^2)^1/2]
h=R-2t/1.732=0.955*(1.05S+0.36t^2)^1/2-0.2t
3.四芯(2α=90度)
S=(PI/4)*R^2-2tR-t^2+t^3/R
R=1.273t+(1.275S+0.296t^2)^1/2
h=R-1.414t