This paper numerically simulated and analyzed the inside and outside magnetic fields of a permanent magnet DC motor with different shield thickness for a certain underwater vehicle in static and load conditions. The acquired results can guide the selection of the shield and it has a good engineering application value.%利用电磁场有限元分析软件MagNet,对某型水下航行器推进用永磁直流电动机分别在静态和负载条件下采用不同厚度屏蔽罩时的磁场进行了数值仿真,分析研究了屏蔽罩对电机内外磁场的影响,所得结果可以指导屏蔽罩的选用,具有较好的工程应用价值.
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