Selectively lowering resistance of a constantly used portion of motor windings in disk drive
AssigneeInternational Business Machines Corporation
InventorsAllen K. Bates, Nhan X. Bui, Reed A. Hancock, Daniel J. Winarski
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Abstract
Dynamic reconfiguration-switching of motor windings in a disk drive is optimized between winding-configurations by selectively lowering resistance of a constantly used portion of one of the motor windings. Acceleration is traded off in favor of higher velocity upon detecting the electric motor in the electric vehicle is at an optimal angular-velocity for switching to an optimal lower torque constant and voltage constant. The total back electromotive force (BEMF) is prohibited from inhibiting further acceleration to a higher angular-velocity.
Claims66
A system for switching motor windings within a disk drive, the system comprising:
- a disk drive having a plurality of motor windings,
- a plurality of switches for controlling a current through the plurality of motor windings of the disk drive, and
- a processor device in communication with the plurality of switches, wherein the processor device:
- optimizes a dynamic reconfiguration-switching of a plurality of motor windings, using m simultaneous-linear equations, having m number of unknown variables, for determining a plurality of voltage constants, an optimal time, and an optimal angular-velocity for performing the dynamic reconfiguration-switching between each of a plurality of winding-configurations, between a plurality of winding-configurations by selectively lowering resistance of a constantly used portion of one of the plurality of motor windings for trading off acceleration in favor of higher velocity upon detecting the disk drive is at an optimal angular-velocity for switching to an optimal lower torque constant and voltage constant thereby preventing a total back electromotive force (BEMF) from inhibiting further acceleration to a higher angular-velocity.
A method for switching motor windings within a disk drive using a processor device, the method comprising:
- optimizing a dynamic reconfiguration-switching of a plurality of motor windings, using m simultaneous-linear equations, having m number of unknown variables, for determining a plurality of voltage constants, an optimal time, and an optimal angular-velocity for performing the dynamic reconfiguration-switching between each of a plurality of winding-configurations, between a plurality of winding-configurations by selectively lowering resistance of a constantly used portion of one of the plurality of motor windings for trading off acceleration in favor of higher velocity upon detecting the disk drive is at an optimal angular-velocity for switching to an optimal lower torque constant and voltage constant thereby preventing a total back electromotive force (BEMF) from inhibiting further acceleration to a higher angular-velocity.
A computer program product for switching motor windings within a disk drive using a processor device, the computer program product comprising a non-transitory computer-readable storage medium having computer-readable program code portions stored therein, the computer-readable program code portions comprising:
- a first executable portion that optimizes a dynamic reconfiguration-switching of a plurality of motor windings, using m simultaneous-linear equations, having m number of unknown variables, for determining a plurality of voltage constants, an optimal time, and an optimal angular-velocity for performing the dynamic reconfiguration-switching between each of a plurality of winding configurations, between a plurality of winding-configurations by selectively lowering resistance of a constantly used portion of one of the plurality of motor windings for trading off acceleration in favor of higher velocity upon detecting the disk drive is at an optimal angular-velocity for switching to an optimal lower torque constant and voltage constant thereby preventing a total back electromotive force (BEMF) from inhibiting further acceleration to a higher angular-velocity.
Dependencies are inferred from the claim text.