| US 7,583,464 B2 | ||
| Apparatus and method compensating mechanical tolerance of brushless direct current motor and related disk drive | ||
| Nam-guk Kim, Anyang-si (Korea, Republic of); and Kyoung-whan Oh, Seoul (Korea, Republic of) | ||
| Assigned to Samsung Electronics Co., Ltd., Suwon-si, Gyeonggi-do (Korea, Republic of) | ||
| Filed on Jan. 08, 2007, as Appl. No. 11/650,420. | ||
| Claims priority of application No. 10-2006-0003497 (KR), filed on Jan. 12, 2006. | ||
| Prior Publication US 2007/0159709 A1, Jul. 12, 2007 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. G11B 15/46 (2006.01) | ||
| U.S. Cl. 360—73.03 [388/803; 318/400.34] | 18 Claims |
| 1. An apparatus compensating for a mechanical tolerance of a motor, the apparatus comprising:
a speed controller calculating a speed error based on a difference between a measured motor speed in each one of a plurality
of control sections using a back electromotive force generated by the motor and a reference speed, and generating a plurality
of motor control input signals in relation to the speed error;
a moving average calculator calculating a moving average value of the plurality of motor control input signals over a moving
average section including recently generated motor control input signals whenever the motor control input signal is generated;
and
a motor driver generating a driving motor current in relation to the moving average value to compensate for the mechanical
tolerance of the motor,
wherein the plurality of control sections are defined within a single rotation period of the motor.
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