Electric rotating machine and stator for the same

Metal working – Method of mechanical manufacture – Electrical device making

Reexamination Certificate

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Reexamination Certificate

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11734131

ABSTRACT:
An electric rotating machine has a rotor having N and S poles and includes a stator with an annular stator core and slots. Multiple-phase stator windings are embedded in the slots, and are formed by winding continuous wires such that straight parts of the stator windings pressed in a flat shape are wound in rings around a grooved cylindrical member. The cylindrical member is inserted into a bore defined by the annular stator core so that the grooves of the cylindrical member are arranged opposite to the slots. The sets of the windings are folded back alternately outside the slots of the stator core and are wound so the sets of the windings are embedded alternately in the direction of the depth of the slots. Leading and trailing ends of the continuous wires are superposed after being wound at least one turn around the circumferentially arranged slots of the stator.

REFERENCES:
patent: 2873514 (1959-02-01), Mills
patent: 3750273 (1973-08-01), Beddows
patent: 4427910 (1984-01-01), Richter et al.
patent: 5998903 (1999-12-01), Umeda et al.
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patent: 7225526 (2007-06-01), Tokizawa
patent: 2001/0019234 (2001-09-01), Murakami et al.
patent: 2002/0036439 (2002-03-01), Ooiwa
patent: 961 008 (1957-03-01), None
patent: 1286045 (2003-02-01), None
patent: 639069 (1950-06-01), None
patent: 11-155270 (1999-06-01), None
patent: 2001-245446 (2001-09-01), None
European Search Report dated Jul. 13, 2004, issued in corresponding EP application EP 040009112.

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Profile ID: LFUS-PAI-O-3931973

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