专利内容由知识产权出版社提供
专利名称：Position sensing system for disc drive
magnetic microactuators
发明人：Lawrence Matthias Bryant申请号：US092116申请日：20010626
公开号：US20020021525A1公开日：20020221
专利附图：
摘要：An apparatus and method for sensing the position of a read/write head ortransducer carried by a microactuator at a distal end of a primary actuator in a head discassembly of a disc drive. The position sensing system has a fixed member attached to the
primary actuator and a moveable member attached to the fixed member by anattachment device. The attachment device permits the moveable member to move inrelation to the fixed member along a predetermined pathway. A secondary voice coilmotor (VCM) drives the movement of the microactuator via a VCM coil that is affixed tothe moveable member, wherein a high frequency signal is applied to the VCM coil. Atleast one sense coil is attached to the fixed member and positioned near the VCM coil,such that the sense coil will receive a portion of the high frequency signal transmittedfrom the VCM coil through mutual magnetic coupling. The magnitude of magneticcoupling at the sense coil will provide a position measurement of the VCM coil of themicroactuator, and thus the transducer, relative to the primary actuator.
申请人：SEAGATE TECHNOLOGY LLC
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