# US 2019/0356201 A1 · Motor and armature thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0356201 A1 - Document ID: US20190356201A1 - Status: Published application - Kind: A1 - Application number: 16/417,970 - Filed: 2019-05-21 - Published: 2019-11-21 - Earliest claimed: 2018-05-21 - Applicants: Johnson Electric International AG - Inventors: Yue LI; Kunlun ZHENG; Hongqiang ZHAO; Haijun HUA; Yaming ZHANG; Yingsong YE; Yonggang ZHANG - Web page: https://patentgrep.com/patent/US20190356201A1 ## CPC - H02K 1/146: {consisting of a generally annular yoke with salient poles} - H02K 1/187: {to inner stators} - H02K 1/2791: Surface mounted magnets; Inset magnets - H02K 3/24: with channels or ducts for cooling medium between the conductors - H02K 3/522: {for generally annular cores with salient poles} - H02K 5/225: {Terminal boxes or connection arrangements (specially adapted for submersible motors H02K5/132)} - H02K 11/014: {Shields associated with stationary parts, e.g. stator cores} - H02K 11/33: Drive circuits, e.g. power electronics (H02K11/38 takes precedence) - H02K 11/40: Structural association with grounding devices - H02K 21/22: with magnets rotating around the armatures, e.g. flywheel magnetos - H02K 2211/03: Machines characterised by circuit boards, e.g. pcb - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract A motor includes a stator, and a rotor rotatable to the stator. The stator includes a magnetic core, a plurality of windings, and at least one shielding member mounted to one of opposite ends of the magnetic core. The magnetic core includes a yoke portion and a plurality of teeth extending from the yoke portion. The windings are correspondingly wound on the teeth. Said at least one shielding member is grounded. The rotor and said at least one shielding member cooperatively bound a shielding space for the windings. ## Claims ### Claim 1 A motor, comprising: a stator comprising a magnetic core, a plurality of windings, and at least one shielding members mounted to one of opposite ends of the magnetic core, the magnetic core comprising a yoke portion and a plurality of teeth extending from the yoke portion, the windings being correspondingly wound on the teeth, said at least one shielding member being grounded; and a rotor rotatable to stator, the rotor and said at least one shielding member cooperatively bounding a shielding space for the windings. ### Claim 2 (depends on 1) The motor of claim 1, wherein said at least one shielding member comprises two shielding members respectively fixed to the opposite ends of the magnetic core. ### Claim 3 (depends on 2) The motor of claim 2, wherein the two shielding members are connected to each other with at least one first fastener. ### Claim 4 (depends on 3) The motor of claim 3, wherein the two shielding members are electrically coupled to each other with said at least one first fastener. ### Claim 5 (depends on 4) The motor of claim 4, wherein said at least one first fastener comprises two first fasteners, the stator further comprises a gasket mounted between and electrically coupled to the two first fasteners. ### Claim 6 (depends on 4) The motor of claim 4, wherein said at least one first fastener extends through and electrically coupled to the magnetic core. ### Claim 7 (depends on 1) The motor of claim 1, wherein said at least one shielding member defines a plurality of venting holes exposing the windings for heat dissipation. ### Claim 8 (depends on 1) The motor of claim 1, wherein the stator further comprises a hollow columnar hub axially extending through and fixed to a center of the magnetic core. ### Claim 9 (depends on 4) The motor of claim 4, wherein the motor further comprises a circuit board with a grounding contact, and one of said at least one first fastener is connected to the ground contact through a wire. ### Claim 10 (depends on 4) The motor of claim 4, wherein said at least one shielding member is made of electrically conductive but non-magnetically permeable material. ### Claim 11 (depends on 10) The motor of claim 10, wherein said at least one shielding member is made of copper or aluminum. ### Claim 12 (depends on 10) The motor of claim 10, wherein said at least one shielding member is a plastic member coating with a conductive layer. ### Claim 13 (depends on 1) The motor of claim 1, wherein the motor is an outer rotor brushless DC motor, the rotor comprises an annular outer casing, a plurality of permanent magnets attached to an inner wall of the outer casing, and a rotating shaft fixed to the outer casing, the stator is located in the outer casing and is movably sleeved on the rotating shaft. ### Claim 14 (depends on 13) The motor of claim 13, wherein one end of the outer casing comprises a bottom wall fixed to the rotating shaft, the other end of the outer casing is open to enable the stator fitted into the outer casing therefrom. ### Claim 15 (depends on 14) The motor of claim 14, wherein the motor further comprises a mounting bracket, the stator is fixed to the mounting bracket, the rotating shaft is rotatably mounted to the mounting bracket. ### Claim 16 (depends on 15) The motor of claim 15, wherein the mounting bracket defines a cavity that is open at one end, the opening end of the cavity is opposite to the opening end of the outer casing. ### Claim 17 An armature of a motor includes a magnetic core comprising a yoke portion and a plurality of teeth extending from the yoke portion, a plurality of windings correspondingly wound on the teeth, and at least one shielding member mounted to one of opposite ends of the magnetic core and be grounded. ### Claim 18 (depends on 17) The armature of claim 17, wherein the armature is a stator of a brushless motor.