Apparatus and method used in disk drive for driving spindle...

Details Apparatus and method used in disk drive for driving spindle... Apparatus and method used in disk drive for driving spindle...

2005-01-11

2005-01-11

Ip, Paul (Department: 2837)

Electricity: motive power systems

Plural, diverse or diversely controlled electric motors

Plural, diverse motor controls

C318S254100, C318S280000, C318S434000, C318S603000, C360S068000, C360S073030, C360S075000, C360S078040

Reexamination Certificate

active

06841954

ABSTRACT:
A CPU sets an SPM driver in SPM start-up mode when a SPM is started up. At this time, a voltage selector applies, to a driver circuit, a voltage (high voltage) boosted by a voltage booster. A starter control circuit controls, during the period of an SPM start-up mode, the driver circuit with the high voltage applied thereto, thereby starting up the SPM. After the SPM has been started up, the CPU sets the SPM driver in PWM mode. At this time, the voltage selector switches the voltage applied to the driver circuit, from the boosted voltage to the voltage (low voltage) of a power supply. During the period of the PWM mode, a PWM circuit controls the driver circuit with the low voltage applied thereto, so as to rotate the SPM at a rated speed.

REFERENCES:
patent: 5161073 (1992-11-01), Gami et al.
patent: 5208518 (1993-05-01), Grapenthin et al.
patent: 5246479 (1993-09-01), Gami et al.
patent: 5623379 (1997-04-01), Nishimura et al.
patent: 6377015 (2002-04-01), Nakabayashi et al.
patent: 6643087 (2003-11-01), Kuroki et al.
patent: 6765746 (2004-07-01), Kusumoto
patent: 20020141102 (2002-10-01), Kusumoto
patent: 20030174428 (2003-09-01), Sakamoto
patent: 20030227707 (2003-12-01), Kokami et al.
patent: 20040070862 (2004-04-01), Ranmuthu
patent: 20040100722 (2004-05-01), Kokami
patent: 0 584 855 (1994-03-01), None
patent: 8-45175 (1996-02-01), None
patent: 8-249806 (1996-09-01), None
patent: 8-275579 (1996-10-01), None
patent: WO 0243064 (2002-05-01), None

Affiliated with

Also associated with

Rating

Apparatus and method used in disk drive for driving spindle... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus and method used in disk drive for driving spindle..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method used in disk drive for driving spindle... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3415920