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电感量怎么计算?/h3>
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<span>文章出处?a href=""><a href="http://cfdz.nsw888.com">深圳市晨飞电子有限公?/a></a></span><span>网责任编辑：<a href="http://cfdz.nsw888.com">NSW</a></span><span>作者：<a href="http://cfdz.nsw888.com">NSW</a></span><span>人气?span
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<p> 之前晨飞电子简单讲述了<a href="http://www.chenfeipower.com/product/product-0001,0016.shtml">电感线圈</a>的绕法，当线圈初步成型之后，由于公式算出来的并不精确，所以需要通过测量该线圈电感，对线圈进行微调。下面就由小编为大家讲一下电感量的测量方法。在实验室已有条件下，通过搭建RL电路，测量电压的方法，计算得出未知电感。做电路图如下：</p>
<p><img width="242" height="124" src="/UploadFiles/FCK/?.png" alt="" /><br />
<br />
根据图像以及已有公式，得到电感公式为?/p>
<p> <img width="113" height="65" src="/UploadFiles/FCK/?.png" alt="" /><br />
根据测得电容量变的电压以及交流电源的电压和频率f。根据公式既可以算出相应的电感?br />
电感的主要特性是贮存磁场能。但由于它一般是用金属导线绕制而成的，所以有绕线电阻(对于磁芯电感还应包括磁性材料插入的损耗电?和线圈匝与匝之间的分布电容。采用一些特殊的制作工艺，可减小分布电容，工作频率也较低时，分布电容可忽略不计。因此，电感的测量主要包括电感量和损?通常用品质因数Q表示)两部分内容?br />
1、谐振法测量电感 <br />
如图所示为并联谐振法测电感的电路，其中C为标准电感，L为被测电感，Co为被测电感的分布电容。测量时，调节信号源频率，使电路谐振，即电压表指示最大，记下此时的信号源频率f，则 </p>
<p><img width="302" height="207" src="/UploadFiles/FCK/图片3.png" alt="" /><br />
<br />
由此可见，还需要测出分布容Co，测量电路如图所示，只是不接标准容。调信号源频率，使电路自然谐振。设此频率为f1，则</p>
<p> </p>
<p> <img width="146" height="141" src="/UploadFiles/FCK/图片4.png" alt="" /><br />
由上两式可得 <br />
将Co代入Ｌ的表达式，即可得到被测电感的电感量?br />
2、交流电桥法测量电感<br />
测量电感的交流电桥如?nbsp;(a)?b)所示的马氏电桥和海氏电桥两种电桥，分别适用于测量品质因数不同的电感?/p>
<p> <img width="382" height="183" src="/UploadFiles/FCK/图片5.png" alt="" /></p>
<p> 交流电桥法测量电?nbsp; (a)所示的马氏电桥适用于测量Ｑ?0的电感，图中Ｌx为被测电感，Rx为被测电感损耗电阻，马氏电桥由电桥平衡条可得?/p>
<p> <img width="173" height="164" src="/UploadFiles/FCK/图片6.png" alt="" /><br />
一般在马氏电桥中，R3用开关换接作为量程选择，R2和Rn为可调元件，由R2的刻度可直读Lx，由Rn的刻度可直读Q值。图 (b)所示的海氏电桥适用于测量Ｑ?0的电感，测量方法和结论与马氏电桥相同?/p>
<p> 大家都学会也吗？如果想了解更?多关于电感量的测量方法，你也可以登录?a href="http://www.chenfeipower.com">深圳晨飞电子</a>的官网进行查?（http://www.chenfeipower.com?/p>
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