在電(dian)(dian)子電(dian)(dian)路設計中，選擇(ze)合適的(de)電(dian)(dian)感元件是(shi)確保電(dian)(dian)路正常運行(xing)的(de)關鍵(jian)因素之一。電(dian)(dian)感大小選擇(ze)的(de)是(shi)否合適，會(hui)直接影(ying)響電(dian)(dian)路的(de)工作效率、電(dian)(dian)流承(cheng)載能力(li)以及性能等。那么電(dian)(dian)路中的(de)電(dian)(dian)感大小應(ying)該如何選擇(ze)呢？

電路中的電感大小其實主要是兩個方面，一是封裝大小；二是關于電性能參數大小。我們先來說一下封裝大小如何選擇！
電(dian)感封(feng)裝大(da)小的(de)選(xuan)擇(ze)主要看電(dian)路板預留的(de)空間(jian)位置大(da)小，這(zhe)個是(shi)比較(jiao)簡(jian)單(dan)的(de)。電(dian)感選(xuan)擇(ze)太(tai)大(da)或者太(tai)小都不合適(shi)。電(dian)路板預留的(de)空間(jian)多大(da)，就選(xuan)多大(da)的(de)封(feng)裝規格即可。

其次是電(dian)(dian)(dian)(dian)(dian)感(gan)(gan)(gan)電(dian)(dian)(dian)(dian)(dian)性(xing)能(neng)(neng)(neng)參數大(da)(da)小(xiao)的(de)選(xuan)(xuan)擇(ze)。電(dian)(dian)(dian)(dian)(dian)性(xing)能(neng)(neng)(neng)參數有(you)電(dian)(dian)(dian)(dian)(dian)感(gan)(gan)(gan)值、電(dian)(dian)(dian)(dian)(dian)流大(da)(da)小(xiao)、阻(zu)抗大(da)(da)小(xiao)等(deng)(deng)(deng)等(deng)(deng)(deng)。有(you)人認為(wei)電(dian)(dian)(dian)(dian)(dian)感(gan)(gan)(gan)感(gan)(gan)(gan)值或者電(dian)(dian)(dian)(dian)(dian)路大(da)(da)小(xiao)、阻(zu)抗大(da)(da)小(xiao)越(yue)大(da)(da)越(yue)好。其實，并非如此！任何(he)一個電(dian)(dian)(dian)(dian)(dian)性(xing)能(neng)(neng)(neng)參數都不是越(yue)大(da)(da)或者越(yue)小(xiao)好！選(xuan)(xuan)擇(ze)電(dian)(dian)(dian)(dian)(dian)感(gan)(gan)(gan)時(shi)需要綜合考慮(lv)其電(dian)(dian)(dian)(dian)(dian)感(gan)(gan)(gan)值、電(dian)(dian)(dian)(dian)(dian)流承載能(neng)(neng)(neng)力、自感(gan)(gan)(gan)系數、品(pin)質(zhi)因(yin)數、散熱性(xing)能(neng)(neng)(neng)、物理(li)尺(chi)寸(cun)、成本和(he)供(gong)應鏈等(deng)(deng)(deng)多個因(yin)素。通過仔細的(de)分析和(he)選(xuan)(xuan)擇(ze)，可以確保電(dian)(dian)(dian)(dian)(dian)路在設(she)計和(he)運行中達到(dao)合理(li)性(xing)能(neng)(neng)(neng)。