International Business Machines Corporation

Nickolas Christopher Apuzzo

Albert John Wallash

Earl Albert Cunningham

Steven Harry Voss

David Malcolm Hannon

Jeffrey B Brown

Raymond Patrick Mallette

Paul Sheldon Tyler

Samir Elias Abboud

The magnetic states of MR reproducing heads are reinitialized during media drive manufacturing by applying initializing magnetic fields to the transducers after they have been manufactured and incorporated into media drive assemblies.

Magnetic reinitialization of thin film magnetoresistive reproducing

A method for starting and operating an electric motor such as the spindle motor of a disk drive assembly employs a segmented stator winding. On startup, the winding segments are connected in series in order to maximize torque. Motor speed is detected, and when a predetermined speed is reached, the segments are connected in parallel to reduce the effective number of winding turns and maintain a control voltage for motor speed control. Switching of the winding segments can be by active elements such as FETs or by passive reactive elements responding directly to motor speed. For more gradual motor torque constant control, the winding may have more than two segments.

Motor starting method and apparatus

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Rochester, MN, United States of America

Nickolas Christopher Apuzzo