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:
Feb. 24, 2015
Filed:
May. 30, 2012
Sang-min Kim, Changwon, KR;
Sung-min Kim, Seoul, KR;
Seung-ki Sul, Seoul, KR;
Seung-eun Park, Changwon, KR;
Yong-cheul Kwon, Seoul, KR;
Joon-ho Park, Changwon, KR;
Sang-Min Kim, Changwon, KR;
Sung-Min Kim, Seoul, KR;
Seung-Ki Sul, Seoul, KR;
Seung-Eun Park, Changwon, KR;
Yong-Cheul Kwon, Seoul, KR;
Joon-Ho Park, Changwon, KR;
Samsung Techwin Co., Ltd., Changwon, KR;
Seoul National University Industry Foundation, Seoul, KR;
Abstract
A method of driving an alternating-current (AC) motor while periodically obtaining a rotator angle of the AC motor. The method includes: (a) driving the AC motor by a d-axis voltage, which is a voltage for an exciting current in a stationary reference frame, and a q-axis voltage, which is a voltage for generating a rotational force in the stationary reference frame, while sequentially applying different d-axis voltages and different q-axis voltages to the AC motor in a control injection period; and (b) obtaining a rotator angle by a d-axis voltage value, a q-axis voltage value, a d-axis current value, and a q-axis current value in the control injection period.
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