# US 10,374,494 B2 · Circuit board, motor and electronic power steering system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,374,494 B2 - Document ID: US10374494B2 - Status: Granted - Kind: B2 - Application number: 15/211,570 - Filed: 2016-07-15 - Published: 2017-02-09 - Granted: 2019-08-06 - Earliest claimed: 2015-08-04 - Assignees: LG Innotek Co., Ltd. - Applicants: LG Innotek Co., Ltd. - Inventors: Jin Su Pyeon - Web page: https://patentgrep.com/patent/US10374494B2 ## CPC - H02K 11/215: Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements - B62D 5/0403: {characterised by constructional features, e.g. common housing for motor and gear box} - B62D 5/0406: {including housing for electronic control unit} - H02K 5/161: {radially supporting the rotary shaft at both ends of the rotor (H02K5/165, H02K5/167, H02K5/173 take precedence)} - H02K 5/225: {Terminal boxes or connection arrangements (specially adapted for submersible motors H02K5/132)} - H02K 29/08: using magnetic effect devices, e.g. Hall-plates, magneto-resistors (H02K29/12 takes precedence) - H02K 2213/06: Machines characterised by the presence of fail safe, back up, redundant or other similar emergency arrangements - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M) ## Abstract The present disclosure provides techniques for securing a running stability of a vehicle, whereby danger of safety accident can be significantly reduced during operation of a vehicle by enabling a minimum number of Hall elements to be driven even during damage to a power terminal or to a ground unit due to defect in circuit by separately forming a power terminal supplying a power to a plurality of magnetic elements in a plurality of numbers. ## Claims ### Claim 1 A circuit board, comprising: a first magnetic element part; a second magnetic element part spaced from the first magnetic element part; a first power terminal electrically connected to the first magnetic element part; and a second power terminal spaced from the first power terminal and electrically connected to the second magnetic element part, wherein the first magnetic element part comprises a plurality of magnetic elements, and the second magnetic element part comprises a plurality of magnetic elements, wherein the plurality of magnetic elements of the first magnetic element part is disposed along a first circular arc having a first radius, and the plurality of magnetic elements of the second magnetic element part is disposed along a second circular arc having a second radius greater than the first radius, and wherein the first circular arc and the second circular arc are concentric. ### Claim 2 (depends on 1) The circuit board of claim 1, wherein the first magnetic element part comprises first to third magnetic elements each spaced from the other magnetic element, and the second magnetic element part comprises fourth and fifth magnetic elements each spaced from the other magnetic element. ### Claim 3 (depends on 2) The circuit board of claim 2, further comprising: a first conductive line connected to the first power terminal, the first magnetic element, the second magnetic element and the third magnetic element; and a second conductive line connected to the second power terminal, the fourth magnetic element and the fifth magnetic element. ### Claim 4 (depends on 2) The circuit board of claim 2, wherein the first to fifth magnetic elements are Hall elements detecting a magnetic force. ### Claim 5 (depends on 1) The circuit board of claim 1, further comprising: a first ground contact part electrically connected to the first magnetic element part; and a second ground contact part electrically connected to the second magnetic element part spaced from the first ground contact part. ### Claim 6 (depends on 1) The circuit board of claim 1, wherein a central angle of the second circular arc is overlapped with at least a part of a central angle of the first circular arc. ### Claim 7 A motor, comprising: a circuit board; a housing accommodated to the circuit board; a stator fixed to the housing; a rotor disposed at an inner side of the stator to rotate through an electric interaction with the stator; a rotation shaft rotating integrally with the rotor; and a sensing magnet disposed at the rotation shaft, wherein the circuit board comprises: a first magnetic element part; a second magnetic element part spaced from the first magnetic element part; a first power terminal electrically connected to the first magnetic element part; and a second power terminal electrically connected to the second magnetic element part spaced from the first power terminal, and wherein the first and second magnetic element parts of the circuit board detect the sensing magnet, wherein the first magnetic element part comprises a plurality of magnetic elements, and the second magnetic element part comprises a plurality of magnetic elements, wherein the plurality of magnetic elements of the first magnetic element part is disposed along a first circular arc having a first radius, and the plurality of magnetic elements of the second magnetic element part is disposed along a second circular arc having a second radius greater than the first radius, and wherein the first circular arc and the second circular arc are concentric. ### Claim 8 (depends on 7) The motor of claim 7, further comprising: a sensing plate coupled to the rotation shaft upwardly spaced apart from the rotor, and the sensing magnet coupled to an upper surface of the sensing plate. ### Claim 9 (depends on 7) The motor of claim 7, further comprising: a first bearing supporting a bottom surface of the rotation shaft; and a second bearing supporting an upper surface of the rotation shaft. ### Claim 10 (depends on 7) The motor of claim 7, further comprising: a support pipe protruded from a central part of a bottom surface of the housing, and wherein the first bearing is installed at the support pipe. ### Claim 11 An electronic power steering system, comprising: a motor; and an electronic controller driving the motor in response to an operating condition of a vehicle, and wherein the motor comprises: a circuit board; a housing accommodated to the circuit board; a stator fixed to the housing; a rotor disposed at an inner side of the stator to rotate through an electric interaction with the stator; a rotation shaft rotating integrally with the rotor; and a sensing magnet disposed at the rotation shaft; wherein the circuit board comprises: a first magnetic element part; a second magnetic element part spaced from the first magnetic element part; a first power terminal electrically connected to the first magnetic element part; and a second power terminal electrically connected to the second magnetic element part spaced apart from the first power terminal, and wherein the first and second magnetic element parts of the circuit board detect the sensing magnet, wherein the first magnetic element part comprises a plurality of magnetic elements, and the second magnetic element part comprises a plurality of magnetic elements, wherein the plurality of magnetic elements of the first magnetic element part is disposed along a first circular arc having a first radius, and the plurality of magnetic elements of the second magnetic element part is disposed along a second circular arc having a second radius greater than the first radius, and wherein the first circular arc and the second circular arc are concentric. ### Claim 12 (depends on 11) The electronic power steering system of claim 11, further comprising: a sensor detecting an operating condition of a vehicle. ### Claim 13 (depends on 12) The electronic power steering system of claim 12, wherein the sensor is a vehicle speed sensor or a torque angle sensor or a torque sensor.