Invention Grant
- Patent Title: Dual-axis planar motor providing force constant and thermal stability
- Patent Title (中): 双轴平面电机提供力常数和热稳定性
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Application No.: US12427224Application Date: 2009-04-21
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Publication No.: US07808133B1Publication Date: 2010-10-05
- Inventor: Gary Peter Widdowson , Wai Chuen Gan
- Applicant: Gary Peter Widdowson , Wai Chuen Gan
- Applicant Address: HK Hong Kong
- Assignee: ASM Assembly Automation Ltd.
- Current Assignee: ASM Assembly Automation Ltd.
- Current Assignee Address: HK Hong Kong
- Agency: Ostrolenk Faber LLP
- Main IPC: H02K41/02
- IPC: H02K41/02

Abstract:
A motor is provided comprising a magnet assembly having two rows of magnets arranged along a first axis, which are separated by a gap for generating magnetic flux lines between the rows of magnets. The motor further comprises a coil bracket which is located within the gap between the two rows of magnets. The coil bracket includes a first set of coils arranged along the first axis that are operative to drive movement of the coil bracket relative to the magnet assembly along the first axis. A second set of coils arranged along the first axis are operative to drive movement of the coil bracket relative to the magnet assembly along a second axis which is orthogonal to the first axis between a first end position and a second end position along the second axis. The first set of coils is fully located within the flux lines generated by the magnet assembly at both the first and second end positions of the coil bracket and the second set of coils is located at least partially outside the flux lines generated by the magnet assembly at the second end position of the coil bracket.
Public/Granted literature
- US20100264755A1 DUAL-AXIS PLANAR MOTOR PROVIDING FORCE CONSTANT AND THERMAL STABILITY Public/Granted day:2010-10-21
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