MVME162-521A

MVME162-521A 旋變的結構示意圖如上圖所示，中間的R1R2線圈為轉子線圈，S1S2、S3S4分別為互相垂直的定子線圈，當R1R2中通入的是高頻正弦信號，我們通常稱該信號為激勵信號；此時會在次級線圈中感應出高頻的感應信號，這個信號就包含了具有位置信息的包絡信號；我們將返回的感應信號提取包絡，就可以獲取對應的正余弦信息；通過硬解碼/軟解碼等方式解碼后，可以得到定子的位置信息（這里注意強調一下是位置）。下面我們來推導一下這個過程：

假設激勵信號為：

Vα=Vs?sin(ωt)

如上圖中的位置所示，旋變的激勵線圈與水平的夾角為 θ ，那么結合激勵線圈中的信號，可以分別得到兩個感應線圈中的信號

MVME162-521A 

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