System and process for utilizing back electromotive force in...

Details System and process for utilizing back electromotive force in... System and process for utilizing back electromotive force in...

2009-06-29

2010-11-23

Ip, Paul (Department: 2837)

Electricity: motive power systems

Switched reluctance motor commutation control

C318S132000, C318S434000, C318S400050, C318S400060, C318S400350

Reexamination Certificate

active

07839102

ABSTRACT:
A circuit system and process utilizes back electromotive force (BEMF) voltage to assist in safe power down of devices, such as the read/write head in from low factor disk drives or similar devices. The BEMF voltage from a motor device, such as a spindle motor utilized in a circuit using negative voltage to drive some switches, such as positive channel metal oxide semiconductor (“PMOS”) driver transistors, to reduce and/or effectively minimize the on-resistance of the switches while delivering the current from BEMF voltage of the motor to another device, such as a motor that retracts controls a read/write head.

REFERENCES:
patent: 3781470 (1973-12-01), Horn
patent: 4055817 (1977-10-01), Watanabe et al.
patent: 4366521 (1982-12-01), Jessee
patent: 4703245 (1987-10-01), Sakamoto
patent: 4703246 (1987-10-01), Sakamoto
patent: 4888533 (1989-12-01), Gotoh
patent: 4912378 (1990-03-01), Vukosavic
patent: 4961182 (1990-10-01), Saito et al.
patent: 5119000 (1992-06-01), Schultz
patent: 5210712 (1993-05-01), Saito
patent: 5210948 (1993-05-01), Seksaria et al.
patent: 5245523 (1993-09-01), Juzswik
patent: 5323093 (1994-06-01), Kikuchi
patent: 5440219 (1995-08-01), Wilkerson
patent: 5508579 (1996-04-01), Suganuma
patent: 5672948 (1997-09-01), Cohen et al.
patent: 5703449 (1997-12-01), Nagate
patent: 5710491 (1998-01-01), Takagi et al.
patent: RE35852 (1998-07-01), Takagi
patent: 5777445 (1998-07-01), Motegi
patent: 5777449 (1998-07-01), Schlager
patent: 5870298 (1999-02-01), Hung
patent: 5886486 (1999-03-01), Jeong
patent: 6023136 (2000-02-01), Pinewski
patent: 6064174 (2000-05-01), Sziebert
patent: 6424106 (2002-07-01), Gotou
patent: 6593751 (2003-07-01), Takahashi
patent: 6674268 (2004-01-01), Rutter et al.
patent: 6697204 (2004-02-01), Cyrusian
patent: 6771033 (2004-08-01), Kokami
patent: 6900604 (2005-05-01), Kokami
patent: 6995530 (2006-02-01), Biamonte
patent: 7088063 (2006-08-01), Kurosawa
patent: 7095195 (2006-08-01), Tagome
patent: 2001/0028230 (2001-10-01), Gotou et al.
patent: 2002/0017887 (2002-02-01), Gotou et al.
patent: 2002/0140395 (2002-10-01), Tazawa et al.
patent: 2003/0156439 (2003-08-01), Ohmichi et al.
patent: 2004/0263231 (2004-12-01), Trafton et al.
patent: 2005/0053367 (2005-03-01), Fulton
patent: 2005/0258788 (2005-11-01), Mori
patent: 2006/0055352 (2006-03-01), Mori
patent: 2006/0097674 (2006-05-01), Nishihara
patent: 2007/0046704 (2007-03-01), Okuda
patent: 2007/0172459 (2007-07-01), Gantier et al.
patent: 2008/0012570 (2008-01-01), Bucur
patent: 2008/0157894 (2008-07-01), Hariton et al.
patent: 2009/0256617 (2009-10-01), Ochi
patent: 2009/0322407 (2009-12-01), Lenz et al.
patent: 2009/0322426 (2009-12-01), Nyboe et al.
patent: 2010/0050024 (2010-02-01), Covalenco et al.

Affiliated with

Also associated with

Rating

System and process for utilizing back electromotive force in... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with System and process for utilizing back electromotive force in..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and process for utilizing back electromotive force in... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4158325