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. 11, 2025
Filed:
May. 24, 2021
Lappeenrannan-lahden Teknillinen Yliopisto Lut, Lappeenranta, FI;
LAPPEENRANNAN-LAHDEN TEKNILLINEN YLIOPISTO LUT, Lappeenranta, FI;
Abstract
A variable reluctance position sensor includes a first element having magnetic sensor sections having excitation coils, first detection coils, and second detection coils, and a second element moveable with respect to the first element. An airgap surface of the second element is periodically meandering. When an alternating signal is supplied to the excitation coils, envelopes of alternating signals induced in the first and second detection coils are dependent on a position of the second element so that the envelopes have a phase shift with respect to each other. The number of the magnetic sensor sections is 1+nP/P, where Pis a spatial shift between successive magnetic sensor sections, Pis a spatial meandering period of the airgap surface, and n is an integer. The magnetic sensor section in addition to the nP/Pmagnetic sensor sections is suitable for compensating for unwanted effects caused by ends of the first element.