【CH246&CH241无线充电套件评估】第二篇-效率测试
<div class='showpostmsg'><p>本次实验是测量无线充套件的功率传输效率。发射板USB type C连接到USB功率测量板上,由USB5V通过USB功率测量板给发射板供电。接收板输出线连接到电子负载上。电子负载设置为恒流模式。接收线圈对准放置到发射线圈上,为防止接收线圈翘起来,需要用重物压住,我用的是一个柠檬。</p><p > </p>
<p > </p>
<p >测量结果:</p>
<table style=" border-collapse:collapse" width="651">
<tbody>
<tr>
<td rowspan="2" style="border-bottom:1px solid black; border-top:1px solid black; border-right:1px solid black; border-left:1px solid black">
<p align="center" >条件</p>
</td>
<td colspan="2" nowrap="nowrap" style="border-bottom:1px solid black; border-top:1px solid black; border-right:1px solid black; border-left:none">
<p align="center" >发射板</p>
</td>
<td colspan="2" nowrap="nowrap" style="border-bottom:1px solid black; border-top:1px solid black; border-right:1px solid black; border-left:none">
<p align="center" >接收板</p>
</td>
<td nowrap="nowrap" rowspan="2" style="border-bottom:1px solid black; border-top:1px solid black; border-right:1px solid black; border-left:none">
<p align="center" >效率</p>
</td>
</tr>
<tr>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none">
<p align="left" >输入电压(V)</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none">
<p align="left" >输入电流(A)</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none">
<p align="left" >输出电压(V)</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none">
<p align="left" >输出电流(A)</p>
</td>
</tr>
<tr>
<td style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:1px solid black" valign="bottom">
<p align="left" >发射板连接5V电源,接收线圈未放置</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >5.1</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >0.025</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="center" >/</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="center" >/</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="center" >/</p>
</td>
</tr>
<tr>
<td rowspan="10" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:1px solid black">
<p align="left" >接收线圈对准防止到发射线圈上,改变输出电流</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >5.094</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >0.103</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >5.063</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >0</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="center" >/</p>
</td>
</tr>
<tr>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >5.089</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >0.214</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >5.062</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >0.1</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="center" >46.48%</p>
</td>
</tr>
<tr>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >5.078</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >0.328</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >5.062</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >0.2</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="center" >60.78%</p>
</td>
</tr>
<tr>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >5.076</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >0.44</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >5.062</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >0.3</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="center" >67.99%</p>
</td>
</tr>
<tr>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >5.07</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >0.561</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >5.06</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >0.4</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="center" >71.16%</p>
</td>
</tr>
<tr>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >5.063</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >0.693</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >5.06</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >0.5</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="center" >72.11%</p>
</td>
</tr>
<tr>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >5.052</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >0.826</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >5.06</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >0.6</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="center" >72.75%</p>
</td>
</tr>
<tr>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >5.045</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >0.965</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >5.06</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >0.7</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="center" >72.75%</p>
</td>
</tr>
<tr>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >5.037</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >1.104</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >5.036</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >0.8</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="center" >72.45%</p>
</td>
</tr>
<tr>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >5.033</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >1.196</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >5.033</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="right" >0.85</p>
</td>
<td nowrap="nowrap" style="border-bottom:1px solid black; border-top:none; border-right:1px solid black; border-left:none" valign="bottom">
<p align="center" >71.07%</p>
</td>
</tr>
</tbody>
</table>
<p > </p>
<p >结论:最大效率为72.75%,发生在输出功率3W-3.5W左右。</p>
<p > </p>
<p >另外,实验中发现,接收端输出电流最大只能拉到850mA左右,对应最大输出功率为4.28W,小于数据手册上讲的最大支持5W输出。不知道测试中还需注意什么,才能测到5W输出。</p>
<p > </p>
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楼主是用电子负载测的电流吗。
<p>是的</p>
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