An embodiment of the invention is a particular arrangement of permanent magnets that generates a higher strength and more uniform magnetic field than existing permanent magnet arrangements for a voice coil motor. The permanent magnet arrangement of an embodiment is based on the Halbach arrangement of permanent magnets. The increased magnetic field strength and uniformity allows for a voice coil motor that is both capable of higher frequency actuations as well as more uniform force over the full stroke of the actuation.
申请公布号
WO2005114821(A2)
申请公布日期
2005.12.01
申请号
WO2005US16755
申请日期
2005.05.12
申请人
DEXTER MAGNETIC TECHNOLOGIES, INC.;DEVANEY, THOMAS, J.;LI, CHUN