# US 11,121,606 B2 · Motor, circuit board, and engine cooling module including the motor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,121,606 B2 - Document ID: US11121606B2 - Status: Granted - Kind: B2 - Application number: 15/980,726 - Filed: 2018-05-15 - Published: 2018-11-22 - Granted: 2021-09-14 - Earliest claimed: 2017-05-17 - Assignees: Johnson Electric International AG - Applicants: Johnson Electric S.A. - Inventors: Yue Li; Youqing Xiang; Xiaojun Yan; Nan Zheng; Minghua Xiong; Yun Chen - Web page: https://patentgrep.com/patent/US11121606B2 ## CPC - H02K 11/30: Structural association with control circuits or drive circuits - H02K 1/2791: Surface mounted magnets; Inset magnets - H02K 9/227: {Heat sinks} - H02K 11/33: Drive circuits, e.g. power electronics (H02K11/38 takes precedence) - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract The present disclosure relates to a motor, a circuit board and an engine cooling module including the motor. The motor includes a stator, the stator includes a control module and a heat sink, the control module includes a circuit board and a plurality of heat generating electronic components mounted on a top surface of the circuit board, a plurality of ceramic heat conducting members is embedded inside the circuit board at positions facing the heat generating electronic components, and the heat sink is attached on a bottom surface of the circuit board. The motor has improved heat dissipation effect. ## Claims ### Claim 1 A motor comprising a stator, the stator comprising a control module and a heat sink, the control module comprising a circuit board and a plurality of heat generating electronic components mounted on a top surface of the circuit board, wherein a plurality of ceramic heat conducting members is embedded inside the circuit board at positions facing the plurality of heat generating electronic components, and the heat sink is attached on a bottom surface of the circuit board, a first conductive layer is disposed on a bottom surface of the ceramic heat conducting member, and the heat sink is soldered to the first conductive layer. ### Claim 2 (depends on 1) The motor according to claim 1, wherein the ceramic heat conducting member is a sintered aluminum nitride ceramic block. ### Claim 3 (depends on 1) The motor according to claim 1, wherein the ceramic heat conducting member penetrates the top surface and the bottom surface of the circuit board. ### Claim 4 (depends on 1) The motor according to claim 1, wherein a second conductive layer is disposed on a top surface of the ceramic heat conducting member, and is electrically connected to the heat generating electronic component. ### Claim 5 (depends on 1) The motor according to claim 1, wherein a substrate of the circuit board is made of an FR-4 grade material, and the ceramic heat conducting member is embedded in the substrate. ### Claim 6 (depends on 1) The motor according to claim 1, wherein the control module of the motor is mounted on only one circuit board, and the circuit board has a power control circuit module and a signal control circuit module. ### Claim 7 (depends on 1) The motor according to claim 1, wherein the stator comprises a stator seat, the stator seat comprises an upper case and a supporting seat for supporting the stator core, the upper case and the heat sink are snap-fitted together and defining a receiving space therebetween for receiving the control module, and the supporting seat is mounted on the upper case. ### Claim 8 (depends on 1) The motor according to claim 1, wherein the motor is an outer rotor permanent magnet motor, the stator comprises a stator seat, a stator core mounted to the stator seat, and stator windings wound around the stator core; the rotor comprises a rotating shaft rotatably mounted to the stator seat, a rotor housing having a cup shape fixed to the rotating shaft, and permanent magnets fixed to an inner wall of the rotor housing; an annular side wall of the rotor housing surrounds the stator core, and the permanent magnets are mounted to an inner surface of the annular side wall. ### Claim 9 (depends on 1) An engine cooling module comprising a motor according to claim 1, a frame and an impeller, the motor being mounted to the frame for driving the impeller. ### Claim 10 A motor comprising a stator, the stator comprising a control module and a heat sink, the control module comprising a circuit board and a plurality of heat generating electronic components mounted on a top surface of the circuit board, wherein a plurality of ceramic heat conducting members is embedded inside the circuit board at positions facing the plurality of heat generating electronic components, and the heat sink is attached on a bottom surface of the circuit board, wherein the motor is an outer rotor permanent magnet motor, the stator comprises a stator seat, a stator core mounted to the stator seat, and stator windings wound around the stator core; the rotor comprises a rotating shaft rotatably mounted to the stator seat, a rotor housing having a cup shape fixed to the rotating shaft, and permanent magnets fixed to an inner wall of the rotor housing; an annular side wall of the rotor housing surrounds the stator core, and the permanent magnets are mounted to an inner surface of the annular side wall.