Method of producing a stator for a disk drive motor

Details Method of producing a stator for a disk drive motor Method of producing a stator for a disk drive motor

1996-04-22

1998-12-29

Derrington, James

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156 622, 156 8916, 156 8921, 264632, 264642, 264645, 264670, 264678, 2643282, 419 5, 419 37, 419 38, 360 9908, C04B 3700

Patent

active

058535136

ABSTRACT:
A disk drive is disclosed including a substantially monolithic stator. The stator is formed by a metal injected molding (MIM) process in which high silicon iron is sintered to produce a stator made from loss magnetic material. The low loss magnetic material is a low hysteresis loss, high resistivity material. A substantially monolithic stator without multiple laminations is thus achieved. Avoiding stator laminations in this manner permits the fabrication of a disk drive having a significantly reduced vertical profile while still suppressing undesired eddy current and hysteresis losses in the stator. The stator is advantageously directly machined with a central bore to receive a bearing assembly for the spindle of the hub of the drive motor. The disclosed stator geometry is optimized in three dimensions to minimize stator volume and maximize the stator winding volume.

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"Prairie 120" PrairieTek Corporation Publication, .COPYRGT.1989.

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