Brushless motor and disk drive device using the same

Details Brushless motor and disk drive device using the same Brushless motor and disk drive device using the same

2007-08-14

2007-08-14

Donovan, Lincoln (Department: 2837)

Electricity: motive power systems

Plural, diverse or diversely controlled electric motors

Running-speed control

C318S059000, C318S132000, C318S434000, C318S254100

Reexamination Certificate

active

11194742

ABSTRACT:
A brushless motor according to the present invention provided with a recording disk in a rotational member and serving to rotate the recording disk together with the rotational member comprises a first position detecting means for detecting a rotational position of the rotational member, a second position detecting means for detecting a rotational position of the recording disk, wherein a mode for rotating the rotational member at a high speed by a detection signal of the first position detecting means and a mode for rotating the rotational member at a low speed by a detection signal of the second position detecting means are generated. Thereby, the two rotation states whose rotation speeds are different can be obtained in a simplified constitution.

REFERENCES:
patent: 3246307 (1966-04-01), Stanley
patent: 4197489 (1980-04-01), Dunn et al.
patent: 6034499 (2000-03-01), Tranovich
patent: 08-172763 (1996-07-01), None
patent: 10-79161 (1998-03-01), None
patent: 2000-182305 (2000-06-01), None

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