PCB过孔载流计算器
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<table cellpadding="0" cellspacing="0" class="vwtb"><tbody><tr><td id="article_content"><script type="text/javascript">
//过孔截流
function Via_current_calc()
{
var temp=document.getElementById("input1_temp").value
var temp_unit=document.getElementById("input1_temp_unit").value;
if (temp_unit=="F")
{
temp=temp*5/9;
}
var thickness=document.getElementById("input1_thickness").value*document.getElementById("input1_thickness_unit").value;
var viadia=document.getElementById("input1_viadia").value*document.getElementById("input1_viadia_unit").value
circumference=(viadia+thickness/2)* 3.141592654
vc = 0.048 * Math.pow(temp, 0.44) * Math.pow(( thickness * circumference ), 0.725);
document.getElementById("input1_current").value=vc.toPrecision(4)
}
</script>
<table class="gridtable">
<tbody><tr>
<th colspan="4" class="apphot">PCB过孔载流计算器
</th>
</tr>
<tr>
<td>孔径:</td>
<td>
<input value="10" id="input1_viadia" name="input1_viadia" onkeyup="Via_current_calc()" type="text">
</td>
<td>
<select id="input1_viadia_unit" onchange="Via_current_calc()" name="input1_viadia_unit">
<option value="1" selected="selected">mil</option>
<option value="39.37">mm</option>
</select>
</td>
<td rowspan="4"><div align="center"><p><img src="/template/rtj1009_010/image/jisuan/pcbgkzl.png" data-bd-imgshare-binded="1"></p></div></td>
</tr>
<tr>
<td>孔壁铜厚:</td>
<td>
<input id="input1_thickness" name="input1_thickness" value="1" onkeyup="Via_current_calc()" type="text">
</td>
<td>
<select id="input1_thickness_unit" onchange="Via_current_calc()" name="input1_thickness_unit">
<option value="1">mil</option>
<option value="1.37795">oz/in.^2</option>
<option value="39.4">mm</option>
<option value="0.03937">um</option>
</select>
</td>
</tr>
<tr>
<td>温升:</td>
<td>
<input id="input1_temp" name="input1_temp" value="10" onkeyup="Via_current_calc()" type="text">
</td>
<td>
<select id="input1_temp_unit" onchange="Via_current_calc()" name="input1_temp_unit">
<option value="C" selected="selected">C</option>
<option value="F">F</option>
</select>
</td>
</tr>
<tr>
<td>电流:</td>
<td>
<input name="input1_current" class="eda_input_res" id="input1_current" onclick="Via_current_calc()" value="1.667" type="text">
</td>
<td>安培</td>
</tr>
<tr>
<td colspan="4">说明:依据IPC-2221标准,以上计算结果仅供参考</td>
</tr>
</tbody></table></td></tr></tbody></table>
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</div> 顶一下DDDDDDD 这个挺不错的,大力支持!! 666,谢谢分享,这个挺好用的 这个温升参数哪来的 真是有帮助啊 谢谢!!! PCB过孔载流计算器
https://www.pcbbar.com/forum.php?mod=viewthread&tid=16175&fromuid=68594
(出处: PCB联盟网)
PCB过孔载流计算器
https://www.pcbbar.com/forum.php?mod=viewthread&tid=16175&fromuid=68594
(出处: PCB联盟网)
这个温升是指的温度变化范围么?
挺好用的,下次可以用这个计算载流量