且永 磁环从每对SN的磁极间隙正中穿过。
The permanent magnetic ring traverses through the clearance of magnetic poles of each pair of SN.
给出了波荡器垫补修正场的简单解析计算式，可根据垫片的位置、大小、厚度、磁极间隙等参数直接计算出对磁场及位相的修正。
An simple analytical computation formula is given for field signature of the shims to predict the field and phase perturbation according the shim position, size, thickness and magnet gap.
转子和定子采用优质磁性材料制成，转子和磁极之间留有一定的空气间隙，工作时无任何磨损。
The rotor and the stator are made of high quality magnetic material. There is a gap between rotor and magnetic pole, so no wear occurs during operation.
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