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1. 发明授权

US5546256A Inductive transducer with closed-loop pole circumscribing I-shaped pole to reduce leakage flux 失效
标题翻译：感应传感器带有闭环极点，外接I形极，以减少漏磁通
公开(公告)号：US5546256A
公开(公告)日：1996-08-13
申请号：US327182
申请日：1994-10-21
申请人： Charles H. Tolman
发明人： Charles H. Tolman
IPC分类号： G11B5/31 , G11B5/197
CPC分类号： G11B5/3123 , G11B5/312 , G11B5/313 , Y10T29/49046
摘要： A magnetic pole assembly for a transducer includes a first pole piece having first and second arms joined to form front and back regions. The first and second arms are spaced between the front and back regions to form a region of low leakage-flux density. A second pole piece having front and back regions lies partly in the region of low leakage-flux density between the first and second arms of the first pole. The back region of the second pole is joined to the back region of the first pole, and the front regions of the first and second poles confront to form a gap. In one embodiment, the first and second poles are each formed of first and second portions with the first portion of the first pole and the second portion of the second pole formed in a first thin-film layer and the second portion of the first pole and the first portion of the second pole formed in a second thin-film layer spaced apart and substantially parallel to the first layer. Vias join the first and second portions of the poles together as well as the back portions of the poles. An inductive coil has a plurality of convolutions lying between the two layers, each convolution passing between the poles twice.
摘要翻译：用于换能器的磁极组件包括第一极靴，其具有连接以形成前部区域和后部区域的第一和第二臂。第一和第二臂在前部区域和后部区域间隔开以形成低漏磁通密度的区域。具有前区和后区的第二极片部分地位于第一极的第一和第二臂之间的低漏磁通密度区域。第二极的后部区域连接到第一极的后部区域，第一和第二极的前部区域形成间隙。在一个实施例中，第一和第二极分别由第一和第二部分形成，其中第一极的第一部分和第二极的第二部分形成在第一薄膜层中，第二部分形成在第一极的第二部分第二极的第一部分形成在间隔开并基本上平行于第一层的第二薄膜层中。通孔连接极的第一和第二部分以及极的后部。感应线圈具有位于两层之间的多个卷积，每个卷积在两极之间通过。

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