Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2005-03-15
2005-03-15
Tamai, Karl (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S156430, C310S156450, C310S156440, C310S156460, C310S051000, C310S261100
Reexamination Certificate
active
06867524
ABSTRACT:
A permanent magnet motor to reduce torque ripple includes a rotor having at least three segments. Each of the three segments is formed sequentially adjacent and aligned along an axis of the rotor. Each segment has at least one pair of permanent magnets disposed at a substantially equal interval in a peripheral direction of the rotor. First and second segments are skewed relative to each other by a first angular displacement, and the first and third segments are skewed relative to each other by a second angular displacement. The first and second angular displacements are selected to cause a net sum of torque ripple produced by each of the segments to be substantially equal to zero during an operation of the motor.
REFERENCES:
patent: 4739201 (1988-04-01), Brigham et al.
patent: 4954736 (1990-09-01), Kawamoto et al.
patent: 5355044 (1994-10-01), Uchida et al.
patent: 5397951 (1995-03-01), Uchida et al.
patent: 5760503 (1998-06-01), Tsuchida et al.
patent: 5886440 (1999-03-01), Hasebe et al.
patent: 6252323 (2001-06-01), Nishikawa et al.
patent: 6462452 (2002-10-01), Nakano et al.
patent: 6498449 (2002-12-01), Chen et al.
Comas Yahveh
Ford Global Technologies LLC
Tamai Karl
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