Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1997-06-10
1999-02-23
Ramirez, Nestor
Electrical generator or motor structure
Dynamoelectric
Rotary
310 67A, 310 67R, 310268, H02K 710
Patent
active
058747923
ABSTRACT:
A bicycle generator including a coil stator and a magnetic rotor. The coil stator includes a planar support, and an induction coil portion formed by a plurality of series-connected coil units which are evenly spaced along the circumference of the planar support. The magnetic rotor is rotatable relative to and substantially parallel to the coil stator, and includes a permanent magnet having a plurality of magnetic pole pairs formed on its circumference. The number of coil units in the induction coil portion is equal to the number of magnetic pole pairs in the magnetic rotor, and the coil units is winded into trapezoid or sector shape, and the span angle of each of the magnetic pole in the magnetic rotor is substantially equal to the span angle of each of the coil units in the coil stator. Alternatively, the bicycle generator may comprises a cylindrical coil stator and a cylindrical magnetic rotor. The coil stator includes a cylindrical support having a first cylindrical surface, and a cylindrical induction coil portion formed by a plurality of series-connected coil units which are evenly spaced on the first cylindrical surface of the cylindrical support in the circumferential direction. The cylindrical magnetic rotor includes a second cylindrical surface and a permanent magnet having a plurality of magnetic pole pairs formed on the second cylindrical surface facing the cylindrical induction coil portion.
REFERENCES:
patent: 3884317 (1975-05-01), Kinzel
patent: 4559462 (1985-12-01), Hernandez-Badillo
patent: 4860176 (1989-08-01), Bauwens et al.
patent: 5268602 (1993-12-01), Schwaller
Chen Ray-Ten
Chen Shih-Chou
Weng Chen-Sheng
Wu Tung-Chuan
Industrial Technology Research Institute
Lam Thanh
Ramirez Nestor
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