碳刷到底是什麼?它有什麼作用?

2023-07-14

您會發現,當您購買電動工具時,有些產品的包裝盒中會附送兩個小配件。有些人知道這是一個 碳刷,而有些人既不知道它叫什麼,也不知道如何使用它。

但現在無論是海報還是銷售介紹,電動工具都以無刷電機作為一大賣點。如果問有什麼區別,很多人只知道區別在於有沒有碳刷。那麼碳刷到底是什麼?有刷電機和無刷電機的作用是什麼,有什麼區別?


碳刷的主要成分是碳。工作時,由彈簧壓緊,像刷子一樣對旋轉部分進行工作,故稱為碳刷. The main material is graphite. Carbon brushes are also called electric brushes, which are widely used in electrical equipment. They are used to transmit signals or energy between the fixed part and the rotating part of some motors or generators. The shape is rectangular, and the metal wire is installed in the spring. , The carbon brush is a kind of sliding contact, so it is easy to wear and needs to be replaced regularly and the carbon deposits that have been worn out must be cleaned.

碳刷一般用在直流電器上,比如我們家裡用的冰箱、洗衣機、空調等都是沒有碳刷的。這是因為交流電機不需要恆定的磁場,因此不需要換向器,也不需要碳刷.

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