HALL SENSOR - MAGNET GEOMETRY FOR LARGE STROKE LINEAR POSITION SENSING

• Main Authors: KOWAL YIFTAH, GOLDENBERG EPHRAIM, KORMAN TAL, GOULINSKI NADAV
• Format: Patent
• Language: English; Korean
• Published: 04.03.2024
• Subjects: ACCESSORIES THEREFOR; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; CINEMATOGRAPHY; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; ELECTROGRAPHY; GENERATION; HOLOGRAPHY; MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING ELECTRIC VARIABLES; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; MEASURING MAGNETIC VARIABLES; PHOTOGRAPHY; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; TESTING

위치 감지 유닛은 제1 방향을 따라 측정된 폭(W) 및 제2 방향을 따라 측정된 높이(H)를 갖고 상기 제1 방향을 따라 적어도 좌측 MA 도메인, 중간 MA 도메인 및 우측 MA 도메인을 정의하는 각각의 자기 극성을 갖는 적어도 3개의 자석을 포함하는 자기 어셈블리(MA)로서, 여기서 각각의 MA 도메인의 자기 극성은 상이하고; 및 자속(B)을 측정하기 위한 자속 측정 장치(MFMD)를 포함하고, 여기서 상기 MA는 스트로크(L)이 제1 지점(x0)에서 시작하여 최종 지점(xmax)에서 끝나며, 1mm ≤ L ≤ 100mm을 충족하는 스트로크(L) 내에서 제1 방향을 따라 MFMD에 대해 이동하도록 구성되고, 특정 MA 도메인과 위치 감지 유닛의 MFMD 사이에서 상기 제2 방향을 따라 측정된 직교 거리(D)의 최소값 Dmin은 L/Dmin>10을 충족한다. Position sensing units, comprising a magnetic assembly (MA) having a width W measured along a first direction and a height H measured along a second direction and including at least three magnets having respective magnetic polarizations that define along the first direction at least a left MA domain, a middle MA domain and a right MA domain, wherein the magnetic polarizations of each MA domain are different, and a magnetic flux measuring device (MFMD) for measuring a magnetic flux B, wherein the MA moves relative to the MFMD along the first direction within a stroke L that fulfils 1 mm≤L≤100 mm, stroke L beginning at a first point x0 and ending at a final point xmax, and wherein a minimum value Dmin of an orthogonal distance D, measured along the second direction between a particular MA domain and the MFMD, fulfills L/Dmin>10.