Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1997-03-31
1999-07-13
Dougherty, Thomas M.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 67R, 310216, 310269, 360 9807, 360 9904, 360 9908, H02K 2122, H02K 116
Patent
active
059231106
ABSTRACT:
A spindle motor for a disc drive, such as a CD-ROM drive, is provided. This spindle motor is a brushless motor of a single-phase axial-winding and radial-gap type including a stator, a rotor coupled to said stator, and a driving circuit for supplying a driving signal to the stator to rotate the rotor. The stator includes a pair of upper and bottom salient-pole pieces formed with a plurality of tooth-like portions serving as salient-poles. The peak surface of each tooth-like portion is formed into a symmetrical convex shape, which minimizes the cogging torque of the motor. Further, the use of a phase-adjuster in the driving circuit allows the motor to produce large output torque at high speeds. The output characteristics of this spindle motor meet the requirements of high speed CD-ROM drives.
REFERENCES:
patent: 3860843 (1975-01-01), Kawasaki et al.
patent: 4812692 (1989-03-01), Arita
patent: 4843288 (1989-06-01), Volz et al.
patent: 4891567 (1990-01-01), Fujitani et al.
patent: 4899075 (1990-02-01), Hasebe et al.
patent: 4987331 (1991-01-01), Horng et al.
patent: 5093599 (1992-03-01), Horng et al.
patent: 5111095 (1992-05-01), Hendershot
patent: 5216664 (1993-06-01), Sleegers et al.
patent: 5519687 (1996-05-01), Peeters
patent: 5552650 (1996-09-01), Cap et al.
patent: 5557184 (1996-09-01), Hwang
patent: 5636193 (1997-06-01), Ohmi
patent: 5689147 (1997-11-01), Kaneda et al.
Hong Alex
Hong Yin-Rong
Huang Chiang Cheng
Huang Der-Ray
Lean Eric-G.
Dougherty Thomas M.
Industrial Technology Research Institute
Nguyen Tran N
Sunonwealth Electric Machine Industry Co. Ltd.
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