Invention Grant
- Patent Title: Coil variations for an oval coil planar motor
- Patent Title (中): 椭圆线圈平面电机的线圈变化
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Application No.: US12728196Application Date: 2010-03-20
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Publication No.: US08492934B2Publication Date: 2013-07-23
- Inventor: Michael B. Binnard
- Applicant: Michael B. Binnard
- Applicant Address: JP Tokyo
- Assignee: Nikon Corporation
- Current Assignee: Nikon Corporation
- Current Assignee Address: JP Tokyo
- Main IPC: H02K41/035
- IPC: H02K41/035

Abstract:
Methods and apparatus for providing an efficient oval coil planar motor are disclosed. According to one aspect of the present invention, an electromagnetic actuator includes at least a first coil group, at least a second coil group, and a magnet array. The first coil group includes at least a first coil that is of an elongated toroidal shape. The first coil has a first coil length and a first coil width that is approximately equal to a multiple of three times the first coil width. The second coil group includes at least a second coil that is of an elongated toroidal shape. The second coil has a second coil width and a second coil length that is approximately equal to a multiple of three times the second coil width. The second coil group is approximately adjacent to the first coil group. The magnet array is configured to cooperate with the first and second coil groups, and includes a plurality of magnets. The magnets have an associated magnet pitch, and the first coil width and the second coil width are a function of the magnet pitch.
Public/Granted literature
- US20100238425A1 Coil Variations for an Oval Coil Planar Motor Public/Granted day:2010-09-23
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