1784-PCC1

電容器的選擇應(yīng)根據(jù)電機(jī)的起動(dòng)電流和額定電壓來(lái)確定，通常的選擇方法是：電容器的容量應(yīng)為電機(jī)額定功率的2~3倍，額定電壓應(yīng)與電機(jī)額定電壓相同。

　　校驗(yàn)電容器

　　選擇好電容器后，還需要校驗(yàn)其容量是否符合要求。方法是將電容器接入電路并啟動(dòng)電機(jī)，觀察電機(jī)的啟動(dòng)情況，若電機(jī)啟動(dòng)正常且電容器沒(méi)有過(guò)熱現(xiàn)象，則表明電容器容量符合要求。若發(fā)現(xiàn)問(wèn)題，應(yīng)更換容量更大或更小的電容器，直到電機(jī)能夠正常啟動(dòng)為止。

　　需要注意的是，在選擇和校驗(yàn)電容器時(shí)，應(yīng)根據(jù)電機(jī)和電容器的使用說(shuō)明和要求進(jìn)行操作，避免因誤操作而導(dǎo)致電機(jī)或電容器損壞。

　　對(duì)于單相電機(jī)的電容器，其損壞會(huì)導(dǎo)致電機(jī)無(wú)法正常啟動(dòng)或運(yùn)行，因此需要進(jìn)行定期的檢測(cè)和維護(hù)。電容器的好壞可以通過(guò)以下幾種方法進(jìn)行測(cè)量：

　　電容值測(cè)量法

　　使用萬(wàn)用表或電容表可以直接測(cè)量電容器的電容值，判斷其是否正常。一般來(lái)說(shuō)，如果電容器的電容值比額定值偏差較大，或者顯示為無(wú)窮大或極小值，則說(shuō)明電容器可能已經(jīng)損壞。

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