Electrical generator or motor structure – Dynamoelectric – Linear
Reexamination Certificate
2005-04-12
2005-04-12
Mullins, Burton (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Linear
C414S935000, C310S013000
Reexamination Certificate
active
06879063
ABSTRACT:
A positioning device comprising a first part (1) which is movable relatively to a second part (2) in an X-direction and a Y-direction, said first part (1) comprising a carrier (5) on which a system of magnets (3) is arranged according to a pattern of rows (7) and columns (8) extending parallel to the X-direction and the Y-direction, respectively. The magnets in each row and column are arranged according to a Halbach array, i.e. the magnetic orientation of successive magnets in each row (7) and each column (8) rotates 90° counter-clockwise. The second part (2) comprises an electric coil system (4) with two types of electric coils (C1, C2), one type having an angular offset of +45°, and the other type having an offset of −45° with respect to the X-direction. The magnet configuration causes a very strong magnetic field.
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Compter Johan C.
Frissen Petrus C.M.
Loopstra Erik R.
Peijnenburg Antonius T.A.
ASML Netherlands B.V.
Koninklijke Philips Electronics , N.V.
Mullins Burton
Pillsbury & Winthrop LLP
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