減速機技術資料：

直流電機是能實現直流電能和機械能互相轉換的電機。當它作電動機運行時是直流電動機，將電能轉換為機械能；作發電機運行時是直流發電機，將機械能轉換為電能。
實現直流電能和機械能互相轉換的電機。當它作電動機運行時是直流電動機，將電能轉換為機械能；作發電機運行時是直流發電機，將機械能轉換為電能。
當原動機驅動電樞繞組在主磁極N、S之間旋轉時，電樞繞組上感生出電動勢，經電刷、換向器裝置整流為直流后，引向外部負載(或電網)，對外供電，此時電機作直流發電機運行。如用外部直流電源，經電刷換軍用直升機向器裝置將直流電流引向電樞繞組，則此電流與主磁極N.S.產生的磁場互相作用，產生轉矩，驅動轉子與連接于其上的機械負載工作，此時電機作直流電動機運行。
直流電機由定子和轉子兩部分組成，其間有一定的氣隙。其構造的主要特點是具有一個帶換向器的電樞。直流電機的定子由機座、主磁極、換向磁極、前后端蓋和刷架等部件組成。
其中主磁極是產生直流電機氣隙磁場的主要部件，由永磁體或帶有直流勵磁繞組的疊片鐵心構成。直流電機的轉子則由電樞、換向器(又稱整流子)和轉軸等部件構成。
其中電樞由電樞鐵心和電樞繞組兩部分組成。電樞鐵心由硅鋼片疊成，在其外圓處均勻分布著齒槽，電樞繞組則嵌置于這些槽中。換向器是一種機械整流部件。由換向片疊成圓筒形后，以金屬夾件或塑料成型為一個整體。各換向片間互相絕緣。換向器質量對運行可靠性有很大影響。
由直流電動機和發電機工作原理示意圖可以看到，直流電機的結構應由定子和轉子兩大部分組成。直流電機運行時靜止不動的部分稱為定子，定子的主要作用是產生磁場，由機座、主磁極、換向極、端蓋、軸承和電刷裝置等組成。運行時轉動的部分稱為轉子，其主要作用是產生電磁轉矩和感應電動勢，是直流電機進行能量轉換的樞紐，所以通常又稱為電樞，由轉軸、電樞鐵心、電樞繞組、換向器和風扇等組成。

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