# US 12,111,183 B2 · Angular displacement measuring arrangement, angular displacement measuring system and electric motor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,111,183 B2 - Document ID: US12111183B2 - Status: Granted - Kind: B2 - Application number: 17/639,911 - Filed: 2019-09-05 - Published: 2022-10-20 - Granted: 2024-10-08 - Earliest claimed: 2019-09-05 - Assignees: Fraba B.V. - Applicants: Fraba B.V. - Inventors: Michael Loeken; Carmen Alejandro Sanchez Gonzalez - Web page: https://patentgrep.com/patent/US12111183B2 ## CPC - G01D 5/145: {influenced by the relative movement between the Hall device and magnetic fields (see G01R33/06)} - G01D 11/245: {Housings for sensors} - G01D 5/14: influencing the magnitude of a current or voltage - G01D: MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR ## Abstract A rotary angle measuring arrangement includes a shaft, and a rotary angle measuring system which detects a rotary shaft movement. The rotary angle measuring system includes an excitation unit connected to the shaft which generates a magnetic field, a magnetic field sensor, a PCB arrangement, and an evaluation electronics arranged on the PCB arrangement and electrically connected to the magnetic field sensor. The PCB arrangement includes a first PCB section arranged perpendicular to a longitudinal axis of the shaft, and a second PCB section angled with respect to the first PCB section and electrically connected thereto. The magnetic field sensor is arranged on the first PCB section. The magnetic field is detectable via the magnetic field sensor. A parallel projection of the second PCB section onto a longitudinal plane parallel to the longitudinal axis and a parallel projection of the excitation unit onto the longitudinal plane at least partially overlap. ## Claims ### Claim 1 A rotary angle measuring arrangement comprising: a shaft which is configured to rotate, the shaft comprising a longitudinal shaft axis; and a rotary angle measuring system which is configured to detect a rotary shaft movement, the rotary angle measuring system comprising, an excitation unit which is configured to generate an excitation magnetic field and which is co-rotatably connected to the shaft, the excitation unit comprising at least one permanent magnetic excitation magnet, a printed circuit board arrangement comprising, a first printed circuit board section which is arranged perpendicular to the longitudinal shaft axis, and a second printed circuit board section which is arranged at an angle with respect to the first printed circuit board section and which is electrically connected to the first printed circuit board section via a connection device, a first magnetic field sensor which is arranged on the first printed circuit board section, the excitation magnetic field generated by the excitation unit being detectable via the first magnetic field sensor, and an evaluation electronics which is arranged on the printed circuit board arrangement and which is electrically connected to the first magnetic field sensor, wherein, the second printed circuit board section is arranged so that a parallel projection of the second printed circuit board section onto a longitudinal plane which is parallel to the longitudinal shaft axis and a parallel projection of the excitation unit onto the longitudinal plane at least partially overlap, the evaluation electronics comprises at least one electronic component which is arranged between the first printed circuit board section and the first magnetic field sensor, the rotary angle measuring system further comprises a second magnetic field sensor via which the excitation magnetic field generated by the excitation unit is detectable, and the first magnetic field sensor and the second magnetic field sensor are arranged on opposite sides of the first printed circuit board section. ### Claim 2 (depends on 1) The rotary angle measuring arrangement as recited in claim 1, wherein the angle between the first printed circuit board section and the second printed circuit board section is in a range from 70° to 110°. ### Claim 3 (depends on 1) The rotary angle measuring arrangement as recited in claim 1, wherein the angle between the first printed circuit board section and the second printed circuit board section is in a range from 80° to 100°. ### Claim 4 (depends on 1) The rotary angle measuring arrangement as recited in claim 1, wherein the second printed circuit board section is arranged so that a parallel projection of the second printed circuit board section onto a transverse plane which is perpendicular to the longitudinal shaft axis and a parallel projection of the first printed circuit board section onto the transverse plane at least partially overlap. ### Claim 5 (depends on 1) The rotary angle measuring arrangement as recited in claim 1, wherein the connection device is defined by a flexible third printed circuit board section. ### Claim 6 (depends on 1) The rotary angle measuring arrangement as recited in claim 1, wherein, the rotary angle measuring system further comprises a pot-shaped magnetizable shielding element, and the first magnetic field sensor and the first printed circuit board section are arranged to be completely within the pot-shaped magnetizable shielding element. ### Claim 7 (depends on 6) The rotary angle measuring arrangement as recited in claim 6, wherein the evaluation electronics is also arranged to be completely within the pot-shaped magnetizable shielding element shielding element. ### Claim 8 (depends on 1) The rotary angle measuring arrangement as recited in claim 1, wherein the rotary angle measuring system further comprises, a printed circuit board support element which supports the first printed circuit board section at a first axial side, and a first snapping device via which the second printed circuit board section is attached to the printed circuit board support element in a form-locking manner. ### Claim 9 (depends on 8) The rotary angle measuring arrangement as recited in claim 8, wherein, the rotary angle measuring system further comprises a pot-shaped magnetizable shielding element, the first magnetic field sensor and the first printed circuit board section are arranged to be completely within the pot-shaped magnetizable shielding element, a second snapping device is defined by the printed circuit board support element, and the pot-shaped magnetizable shielding element is axially and rotationally fixed via the second snapping device. ### Claim 10 (depends on 8) The rotary angle measuring arrangement as recited in claim 8, wherein the rotary angle measuring system further comprises a printed circuit board fixation element which is attached to the printed circuit board support element and which supports the first printed circuit board section at a second axial side which is opposite to the first axial side. ### Claim 11 (depends on 10) The rotary angle measuring arrangement as recited in claim 10, wherein, the rotary angle measuring system further comprises a pot-shaped magnetizable shielding element, the first magnetic field sensor and the first printed circuit board section are arranged to be completely within the pot-shaped magnetizable shielding element, a second snapping device is defined by the printed circuit board fixation element, and the pot-shaped magnetizable shielding element is axially and rotationally fixed via the second snapping device. ### Claim 12 (depends on 8) An electric motor comprising: the rotary angle measuring arrangement as recited in claim 8, wherein, the shaft is driven by the electric motor, and the printed circuit board support element is attached to a motor flange. ### Claim 13 (depends on 1) The rotary angle measuring arrangement as recited in claim 1, wherein the rotary angle measuring system further comprises a magnetizable shielding disk which radially surrounds the shaft. ### Claim 14 (depends on 1) The rotary angle measuring arrangement as recited in claim 1, wherein, the rotary angle measuring system further comprises a connector plug which is electrically connected to the evaluation electronics, and the connector plug is arranged at a radially outer side of the second printed circuit board section. ### Claim 15 (depends on 1) A rotary angle measuring system for the rotary angle measuring arrangement as recited in claim 1. ### Claim 16 A rotary angle measuring arrangement comprising: a shaft which is configured to rotate, the shaft comprising a longitudinal shaft axis; and a rotary angle measuring system which is configured to detect a rotary shaft movement, the rotary angle measuring system comprising, an excitation unit which is configured to generate an excitation magnetic field and which is co-rotatably connected to the shaft, the excitation unit comprising at least one permanent magnetic excitation magnet, a printed circuit board arrangement comprising, a first printed circuit board section which is arranged perpendicular to the longitudinal shaft axis, and a second printed circuit board section which is arranged at an angle with respect to the first printed circuit board section and which is electrically connected to the first printed circuit board section via a connection device, a first magnetic field sensor which is arranged on the first printed circuit board section, the excitation magnetic field generated by the excitation unit being detectable via the first magnetic field sensor, an evaluation electronics which is arranged on the printed circuit board arrangement and which is electrically connected to the first magnetic field sensor, a printed circuit board support element which supports the first printed circuit board section at a first axial side, and a first snapping device via which the second printed circuit board section is attached to the printed circuit board support element in a form-locking manner, wherein, the second printed circuit board section is arranged so that a parallel projection of the second printed circuit board section onto a longitudinal plane which is parallel to the longitudinal shaft axis and a parallel projection of the excitation unit onto the longitudinal plane at least partially overlap. ### Claim 17 (depends on 16) The rotary angle measuring arrangement as recited in claim 16, wherein the evaluation electronics comprises at least one electronic component which is arranged between the first printed circuit board section and the first magnetic field sensor. ### Claim 18 (depends on 16) The rotary angle measuring arrangement as recited in claim 16, wherein the rotary angle measuring system further comprises a second magnetic field sensor via which the excitation magnetic field generated by the excitation unit is detectable. ### Claim 19 (depends on 18) The rotary angle measuring arrangement as recited in claim 18, wherein the first magnetic field sensor and the second magnetic field sensor are arranged on opposite sides of the first printed circuit board section. ### Claim 20 (depends on 16) The rotary angle measuring arrangement as recited in claim 16, wherein the first snapping device is defined by two snapping hooks.