The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 14, 2008
Filed:
Oct. 18, 2005
Jun-seok Shim, Seongnam-si, KR;
Boldyrev Serguei, Suwon-si, KR;
Jun-seok Shim, Seongnam-si, KR;
Boldyrev Serguei, Suwon-si, KR;
Samsung Electronics Co., Ltd., Suwon-si, KR;
Abstract
A speed control method of controlling a stepping motor to have a uniform instantaneous speed and an apparatus suitable for the same are provided. The stepping motor speed control method includes: calculating a repeated speed error for each phase while rotating a stepping motor at a constant speed and storing the calculated repeated speed error phase by phase; measuring a rotation speed of the stepping motor; sequentially and repeatedly reading the stored repeated speed errors phase by phase by synchronizing with the rotation of the stepping motor; and controlling the speed of the stepping motor with reference to the target speed, the measured speed and the repeated speed error for each phase. Accordingly, the stepping motor speed control apparatus rotates a stepping motor at a uniform instantaneous speed by controlling a rotation speed of the stepping motor phase by phase.