DIRECT DRIVE CONTROLLER WITH HAPTIC FEEDBACK

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:

PCT/US2003/024536

Publication Date:

December 09, 2004

Filing Date:

August 06, 2003

Export Citation:

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Assignee:

ENGINEERING MATTERS INC (US)
COP DAVID (US)
WRIGHT ANDREW (US)
TISCHLER NEIL (US)

International Classes:

G05G9/047; H02K26/00; H02K41/03; (IPC1-7): G05G9/047

Foreign References:

US20020053849A1	2002-05-09
EP0938035A2	1999-08-25
DE19501439A1	1996-09-05

Other References: