公开(公告)号：US09998059B2

公开(公告)日：2018-06-12

申请号：US15667455

申请日：2017-08-02

Applicant: LG ELECTRONICS INC.

Inventor： Gilsu Lee ,  Naechun Park ,  Kyunghoon Lee ,  Sungbae Song

IPC: H02P21/00 ,  H02P27/08 ,  H02P21/18 ,  H02P21/22 ,  H02P21/34

CPC classification number: H02P27/08 ,  H02P1/04 ,  H02P6/16 ,  H02P21/18 ,  H02P21/22 ,  H02P21/24 ,  H02P21/34

Abstract: A motor driving apparatus including a motor including a stator and a rotor rotating in the stator, an inverter configured to supply a driving voltage to a stator coil wound on the stator so as to rotate the rotor, and a control unit configured to, when a target command value is received, change a predetermined reference start-up time point to a start-up time point corresponding to an electrical angle position of the rotor in correspondence with the target command value per rotation of the rotor and to control the inverter to supply the driving voltage at the start-up time point.

公开(公告)号：US10666118B2

公开(公告)日：2020-05-26

申请号：US14978844

申请日：2015-12-22

Applicant: LG ELECTRONICS INC.

Inventor： Jungdae Lee ,  Jongwon Kim ,  Kyunghoon Lee ,  Gilsu Lee

IPC: H02K11/33 ,  H02K11/02 ,  H05K1/18 ,  H05K1/09 ,  H05K1/11 ,  H02K11/25 ,  H05K7/20 ,  H05K1/02 ,  H05K7/14

Abstract: Embodiments provide a printed circuit board including a copper foil layer to form a circuit pattern on a base layer, and an insulation layer laminated on the copper foil layer, and wherein the circuit pattern includes a solder pattern, to which an inverter switch element is soldered to supply drive power to a motor, a heat radiation pattern spaced apart from the solder pattern and to contact with one surface of the inverter switch element so as to absorb and radiate heat in the inverter switch element, a heat circulation pattern, through which the heat absorbed by the heat radiation pattern is circulated, and an element pattern formed on both sides of the heat circulation pattern to allow a thermistor element, a resistance value of which is varied according to the heat, to be soldered to the element pattern.

公开(公告)号：US10186915B2

公开(公告)日：2019-01-22

申请号：US15004152

申请日：2016-01-22

Applicant: LG ELECTRONICS INC.

Inventor： Kwangyong Jang ,  Sangchul Lee ,  Kyunghoon Lee ,  Changhum Jo

IPC: H02K1/14 ,  H02K21/14 ,  H02K1/27 ,  H02K19/10 ,  H02K21/16 ,  H02K9/06 ,  H02K7/14

Abstract: A Blushless Direct Current (BLDC) motor may include a motor housing; a stator including a stator core installed within the motor housing and a coil wound in the stator core and that generates a magnetic field by applied power; and a rotor disposed within the stator and in which a magnet that interacts with the magnetic field is installed and that rotates within the stator by an interaction with the magnetic field. The stator core may include a back yoke in which straight portions and curved portions are alternately formed; and teeth protruded from the back yoke toward the magnet. The tooth include a neck protruded from the back yoke, and a shoe protruded from the neck and separated from the magnet and that encloses at least a portion of the magnet. A ratio A/B of a width A of the neck to a width B of a shoe end portion is 2.5 to 3.5. By optimizing a ratio A/B of a width A of the neck to a width B of the shoe end portion constituting the stator core, efficiency of a BLDC motor may be maximized.

公开(公告)号：US10811919B2

公开(公告)日：2020-10-20

申请号：US15547174

申请日：2016-01-28

Applicant: LG ELECTRONICS INC.

Inventor： Changhum Jo ,  Kyunghoon Lee ,  Kwangyong Jang ,  Jongwon Kim

IPC: H02K1/27 ,  A47L9/22 ,  H02K1/28

Abstract: A brushless direct current (BLDC) motor is disclosed. The BLDC motor includes a shaft made of a nonmagnetic material, a plurality of magnets surrounding the outer circumference of the shaft, a stator surrounding the outer circumferences of the magnets, wherein each of the magnets has an arc-shaped outer circumferential surface, an arc-shaped inner circumferential surface facing the shaft, and opposite side surfaces facing other adjacent magnets, and the magnets include a first magnet magnetized in a direction directed from the outer circumferential surface to the inner circumferential surface, a second magnet magnetized in a direction directed from the inner circumferential surface to the outer circumferential surface, and a third magnet magnetized in a direction directed from one side surface to the other side surface. The efficiency of the motor is improved while eddy current loss is minimized.

公开(公告)号：US09899951B2

公开(公告)日：2018-02-20

申请号：US15041659

申请日：2016-02-11

Applicant: LG ELECTRONICS INC.

Inventor： Gilsu Lee ,  Naechun Park ,  Kyunghoon Lee ,  Sungbae Song

IPC: H02P21/00 ,  H02P27/08 ,  H02P21/22 ,  H02P21/18 ,  H02P6/16 ,  H02P1/04 ,  H02P21/24

CPC classification number: H02P27/08 ,  H02P1/04 ,  H02P6/16 ,  H02P21/18 ,  H02P21/22 ,  H02P21/24 ,  H02P21/34

Abstract: A motor driving apparatus including a motor including a stator and a rotor rotating in the stator, an inverter configured to supply a driving voltage to a stator coil wound on the stator so as to rotate the rotor, and a control unit configured to, when a target command value is received, change a predetermined reference start-up time point to a start-up time point corresponding to an electrical angle position of the rotor in correspondence with the target command value per rotation of the rotor and to control the inverter to supply the driving voltage at the start-up time point.