Disc drive spindle motor with programmable current control

Details Disc drive spindle motor with programmable current control Disc drive spindle motor with programmable current control

1999-08-27

2000-12-26

Masih, Karen

Electricity: motive power systems

Limitation of motor load, current, torque or force

318599, 318811, 318254, 318138, 318439, 388804, H02K 1732

Patent

active

061665037

ABSTRACT:
A disc drive includes an apparatus for limiting coil energization current to a programmable value. A current sensor is operatively coupled to a coil and provides a signal which is indicative of current flow through the coil. A configurable voltage source is responsive to a control signal. A current inhibitor is operatively coupled to the output of the current sensor and the voltage source such that the current inhibitor selectively inhibits current flow through the coil based on results of a comparison between the current sensor signal and a voltage supplied by the configurable voltage source. A method of calibrating a current control threshold is also provided as well as a method of controlling the coil energization current.

REFERENCES:
patent: 6011375 (2000-01-01), Korbel et al.

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