Disk drive including means for preventing rotation

Details Disk drive including means for preventing rotation Disk drive including means for preventing rotation

2005-06-21

2005-06-21

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

Reexamination Certificate

active

06909573

ABSTRACT:
A motor controller includes DC motor, driving mechanism, voltage generator circuit and control unit. The driving mechanism moves an object having a predetermined mass against a load applied to the object and by transmitting a rotational force of the motor to the object. The voltage generator circuit generates first and second voltages. The first voltage is high enough to rotate the motor to such a degree as to get the object moved by the driving mechanism. The second voltage has the same polarity as the first voltage and has such amplitude as to prevent the motor from rotating either in a backward direction due to a cogging torque or in a forward direction. The control unit controls the voltage generator circuit in such a manner that the voltage generator circuit applies the second voltage to the motor after having applied the first voltage to the motor.

REFERENCES:
patent: 3839664 (1974-10-01), Derks
patent: 3854080 (1974-12-01), Bambara
patent: 3893012 (1975-07-01), Lin
patent: 4365189 (1982-12-01), Hawkins et al.
patent: 4378855 (1983-04-01), Haub et al.
patent: 4739239 (1988-04-01), Krause
patent: 5189355 (1993-02-01), Larkins
patent: 5541483 (1996-07-01), Yang
patent: 6154605 (2000-11-01), Aonuma
patent: 6720674 (2004-04-01), Gabrys
patent: 6759824 (2004-07-01), Kawabata et al.
patent: 6812600 (2004-11-01), Wauke
patent: 2000-20974 (2000-01-01), None

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