# US 11,451,119 B2 · Motor with a board having microcomputer and drive circuit, and air conditioning apparatus having the motor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,451,119 B2 - Document ID: US11451119B2 - Status: Granted - Kind: B2 - Application number: 16/480,712 - Filed: 2017-03-27 - Published: 2020-01-23 - Granted: 2022-09-20 - Earliest claimed: 2017-03-27 - Assignees: Mitsubishi Electric Corporation - Applicants: Mitsubishi Electric Corporation - Inventors: Hiroki Aso; Takaya Shimokawa; Ryogo Takahashi; Kazuma Nomoto - Web page: https://patentgrep.com/patent/US11451119B2 ## CPC - H02K 11/33: Drive circuits, e.g. power electronics (H02K11/38 takes precedence) - F24F 1/0018: characterised by fans (with secondary air induced by injector action of the primary air F24F1/01) - G05B 19/042: using digital processors (G05B19/05 takes precedence) - H02K 1/146: {consisting of a generally annular yoke with salient poles} - H02K 1/276: Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] - H02K 1/30: using intermediate parts, e.g. spiders - H02K 3/345: {between conductor and core, e.g. slot insulation} - H02K 3/38: around winding heads, equalising connectors, or connections thereto - H02K 9/22: by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges - H02K 9/227: {Heat sinks} - H02K 11/215: Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements - H02K 21/16: having annular armature cores with salient poles (with homopolar co-operation H02K21/20) - G05B 2219/25252: Microprocessor - H02K 1/2746: the rotor consisting of magnets arranged with the same polarity, e.g. consequent pole type - H02K 2203/03: Machines characterised by the wiring boards, i.e. printed circuit boards or similar structures for connecting the winding terminations - H02K 2203/12: Machines characterised by the bobbins for supporting the windings - 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}) - F24F: AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced B08B15/00; vertical ducts for carrying away waste gases from buildings E04F17/02; tops for chimneys or ventilating shafts, terminals for flues F23L17/02) - G05B: CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS (systems for controlling or regulating non-electric variables G05D; systems for regulating electric or magnetic variables G05F; control devices or systems insofar as characterised by mechanical features only G05G) ## Abstract A motor includes a rotor having a rotation shaft, a rotor core attached to the rotation shaft, and a rotor magnet embedded in the rotor core, a stator disposed on an outer side of the rotor in a radial direction about a central axis of the rotation shaft and surrounding the rotor, a board disposed on one side of the stator in a direction of the central axis, and a microcomputer mounted on the board. The microcomputer is disposed on an outer side of the rotor magnet in the radial direction. ## Claims ### Claim 1 A motor comprising: a rotor having a rotation shaft, a rotor core attached to the rotation shaft, and a rotor magnet embedded in the rotor core; a stator disposed on an outer side of the rotor in a radial direction about a central axis of the rotation shaft, the stator surrounding the rotor; a board disposed on one side of the stator in a direction of the central axis; a microcomputer mounted on the board and performing arithmetic processing; a drive circuit mounted on the board and controlling rotation of the rotor; a mold resin portion covering the stator, the board, the microcomputer and the drive circuit; and a heat sink disposed on a side of the board opposite to the stator, wherein the heat sink is disposed to face the microcomputer and the drive circuit, and is exposed to an outside from the mold resin portion, wherein the microcomputer is provided on a surface of the board opposite to the stator, the microcomputer being disposed on an outer side of the rotor magnet in the radial direction, and wherein a distance from the central axis to the microcomputer in the radial direction is longer than a distance from the central axis to the drive circuit in the radial direction. ### Claim 2 (depends on 1) The motor according to claim 1, wherein the rotor has a magnet magnetic pole formed by the rotor magnet, and a pseudo-magnetic pole formed by the rotor core. ### Claim 3 (depends on 1) The motor according to claim 1, wherein the rotor has a first magnet as the rotor magnet, and a second magnet forming a magnetic pole having a polarity opposite to the first magnet. ### Claim 4 (depends on 1) The motor according to claim 1, wherein the stator has a yoke extending in a circumferential direction about the central axis, and a first tooth and a second tooth extending toward the central axis from the yoke, the first tooth and the second tooth being adjacent to each other in the circumferential direction, wherein the microcomputer is disposed between the first tooth and the second tooth in the circumferential direction. ### Claim 5 (depends on 1) The motor according to claim 1, wherein the stator has a stator core and an insulator disposed on the stator core, the insulator having a board fixing portion to which the board is fixed. ### Claim 6 (depends on 1) The motor according to claim 1, further comprising a frame composed of metal and covering the stator, the board, and the microcomputer. ### Claim 7 (depends on 1) The motor according to claim 1, wherein the drive circuit is disposed on a side of the board opposite to the stator. ### Claim 8 (depends on 1) The motor according to claim 1, wherein an output waveform of the drive circuit is a sine wave, and a carrier frequency of the output waveform is 10 kHz. ### Claim 9 (depends on 1) The motor according to claim 1, further comprising a resin portion disposed between the rotation shaft and the rotor core, the resin portion supporting the rotor core. ### Claim 10 (depends on 1) The motor according to claim 1, further comprising a Hall element mounted on the board, the Hall element detecting magnetic flux from the rotor. ### Claim 11 (depends on 10) The motor according to claim 10, wherein the microcomputer performs arithmetic processing to detect a rotational position of the rotor, based on a detection result of the Hall element. ### Claim 12 (depends on 10) The motor according to claim 10, wherein the Hall element is disposed on a surface of the board facing the stator. ### Claim 13 (depends on 10) The motor according to claim 10, wherein the Hall element is disposed on the outer side of the rotor magnet in the radial direction. ### Claim 14 (depends on 10) The motor according to claim 10, further comprising a sensor magnet mounted on the rotor, the sensor magnet facing the board in the direction of the central axis. ### Claim 15 An air conditioning apparatus comprising an outdoor unit and an indoor unit connected to the outdoor unit via a refrigerant pipe, at least one of the outdoor unit and the indoor unit comprising a fan, the fan comprising an impeller and a motor rotating the impeller, the motor comprising: a rotor having a rotation shaft, a rotor core attached to the rotation shaft, and a rotor magnet embedded in the rotor core; a stator disposed on an outer side of the rotor in a radial direction about a central axis of the rotation shaft, the stator surrounding the rotor; a board disposed on one side of the stator in a direction of the central axis; a microcomputer mounted on the board and performing arithmetic processing; a drive circuit mounted on the board and controlling rotation of the rotor; a mold resin portion covering the stator, the board, the microcomputer and the drive circuit; and a heat sink disposed on a side of the board opposite to the stator, wherein the heat sink is disposed to face the microcomputer and the drive circuit, and is exposed to an outside from the mold resin portion, wherein the microcomputer is provided on a surface of the board opposite to the stator, the microcomputer being disposed on an outer side of the rotor magnet in the radial direction, and wherein a distance from the central axis to the microcomputer in the radial direction is longer than a distance from the central axis to the drive circuit in the radial direction. ### Claim 16 (depends on 15) The air conditioning apparatus according to claim 15, wherein the rotor has a magnet magnetic pole formed by the rotor magnet, and a pseudo-magnetic pole formed by the rotor core. ### Claim 17 (depends on 15) The air conditioning apparatus according to claim 15, wherein the rotor has a first magnet as the rotor magnet, and a second magnet forming a magnetic pole having a polarity opposite to the first magnet. ### Claim 18 (depends on 15) The air conditioning apparatus according to claim 15, the motor further comprising a Hall element mounted on the board, the Hall element detecting magnetic flux from the rotor.