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:
May. 27, 2014
Filed:
Jun. 30, 2011
Yuichi Manabe, Inazawa, JP;
Tetsuji Inoue, Nagoya, JP;
Yuichi Manabe, Inazawa, JP;
Tetsuji Inoue, Nagoya, JP;
Aisan Kogyo Kabushiki Kaisha, Obu-Shi, JP;
Abstract
A rotational position sensor includes a rotor substrate and a stator substrate placed to face each other to detect rotational displacement of the rotor substrate. The rotor substrate is formed with an excitation coil in a meandering pattern on an outer circumferential side and a rotor-side rotary transformer on an inner circumferential side. The stator substrate is formed with four detection coils in a meandering pattern on an outer circumferential side and a stator-side rotary transformer on an inner circumferential side. The four detection coils are arranged in a circumferential direction without overlapping each other. The detection coils are displaced from each other by 360°/8. The rotational position sensor includes a high frequency excitation circuit for applying a high frequency signal to the excitation coil through the rotor-side rotary transformer and the rotor-side rotary transformer to excite the excitation coil.