Method and apparatus for retracting head and braking motor of a

Details Method and apparatus for retracting head and braking motor of a Method and apparatus for retracting head and braking motor of a

1986-03-05

1987-04-14

Stellar, George G.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

360 75, G11B 5012, G11B 554

Patent

active

046583084

ABSTRACT:
The head assembly of a disc drive device is retracted upon the interruption of power to that device by utilizing the emf that is generated by the disc drive spindle motor as a result of the rotation of that motor following power interruption. Then, after a delay sufficient to allow the head assembly time to retract, the spindle motor is dynamically braked. Dynamic braking is achieved by utilizing a voltage to which a capacitor has been charged during normal operation to energize switching elements which effectively short circuit the motor windings.

REFERENCES:
patent: 3626264 (1971-12-01), Halfhill et al.
patent: 3629679 (1971-12-01), Halfhill
patent: 3956766 (1976-05-01), Hanson et al.
patent: 4237501 (1980-12-01), Barmache et al.
patent: 4371903 (1983-02-01), Lewis

Affiliated with

Also associated with

Rating

Method and apparatus for retracting head and braking motor of a does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for retracting head and braking motor of a , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for retracting head and braking motor of a will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1789618