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Patent Searching and Data


Title:
DIRECT DRIVE CONTROLLER WITH HAPTIC FEEDBACK
Document Type and Number:
WIPO Patent Application WO2004013803
Kind Code:
A3
Abstract:
A reliable and cost-efficient direct drive force feedback motor is suitable for joystick applications, allowing multiple degrees of output freedom, requiring no coil commutation, and permitting compact packaging. A multiple degree-of-freedom motor (10) consistent with the invention comprises an output shaft (22), a stator (25, 27), and a rotor (38, 40, 42). The stator (25, 27) comprises first (25) and second (27) lamination stacks, each lamination stack having an interior curved surface and a coil wound (16, 18) thereon, the lamination stacks (25, 27) being disposed adjacent the output shaft (22). The rotor (38, 40, 42) is fixed to the output shaft (22) and movably supported adjacent the stator (25, 27) with an air gap disposed between the rotor (38, 40, 42) and the stator (25, 27), the rotor including at least one magnet (40, 42) disposed thereon and being movable along the interior curved surface of the lamination stacks (25, 27) in directions defining at least first and second degrees of freedom. Energization of the coil (16) of the first lamination stack (25) establishes a first magnetic field to urge the output shaft (22) to rotate in a first plane, and energization of the coil (18) of the second lamination stack (27) establishes a second magnetic field to urge the output shaft (22) to rotate in a second plane substantially orthogonal to the first plane.

Inventors:
COP DAVID (US)
WRIGHT ANDREW (US)
TISCHLER NEIL (US)
Application Number:
US0324536W
Publication Date:
December 09, 2004
Filing Date:
August 06, 2003
Export Citation:
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Assignee:
ENGINEERING MATTERS, INC.
COP, DAVID
WRIGHT, ANDREW
TISCHLER, NEIL
International Classes:
G05G9/047; H02K26/00; H02K41/03; (IPC1-7): G05G9/047
Foreign References:
US20020053849A12002-05-09
EP0938035A21999-08-25
DE19501439A11996-09-05
Other References:
See also references of EP 1529256A2
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