Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2007-07-17
2007-07-17
Lam, Thanh (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S06700R, C310S156050
Reexamination Certificate
active
11216015
ABSTRACT:
A three-phase brushless motor in one mode of the present invention is comprised of a rotation axis, a rotor yoke rotating around said rotation axis, a drive magnet formed into a ring shape and attached on said rotor yoke, said drive magnet having a plurality of magnetized poles at an equal magnetization pitch angle Pm, a plurality of drive coils disposed so that the center of each said drive coil is at angular intervals of a predetermined arrangement angle Pc, the angle Pc being 4/3 times said magnetization pitch angle Pm, a rotation detecting magnet attached on said rotor yoke, and a magnetic sensor attached opposing said rotation detecting magnet so as to detect a magnetic flux of said rotation detecting magnet, wherein said magnet sensor is disposed at a position in which a magnetic flux from said drive magnet and a magnetic flux from said drive coils are canceled with each other.
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Hosono Toshikazu
Kumagai Yoshiki
Lam Thanh
Meyer Jerald L.
Richmond Derek
The Nath Law Group
Victor Company of Japan , Limited
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