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公开(公告)号：US20210270511A1
公开(公告)日：2021-09-02
申请号：US17185339
申请日：2021-02-25
Applicant: LG Electronics Inc.
Inventor： Sunghwan KIM , Jeongeon OH , Yonghwa LEE , Songhee YANG
Abstract: A motor driving apparatus includes: an inverter that includes a plurality of switching elements and that is configured to output AC power to a motor by a switching operation of the plurality of switching elements, a switching unit that includes a relay and that is configured to switch a connection mode of the motor by an operation of the relay, and an inverter controller configured to control the inverter and the switching unit. The inverter controller is configured to, based on the relay being turned off, apply a reverse voltage to the relay.
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公开(公告)号：US20230155485A1
公开(公告)日：2023-05-18
申请号：US17952814
申请日：2022-09-26
Applicant: LG Electronics Inc.
Inventor： Sanghyeon KIM , Phillsik GONG , Jeongeon OH , Songhee YANG
CPC classification number: H02M1/4225 , F24F11/88 , H02M1/0009 , H02P27/08 , H02M7/06
Abstract: The present disclosure discloses a power transforming apparatus capable of reducing a stress of a converter switch during a PFC operation, an operation method thereof, and an air conditioner including the same. To this end, the power transforming apparatus according to the present disclosure may determine the number of converters for performing the PFC operation based on a magnitude of input power and a speed of the motor. Furthermore, the PFC operation may be performed using only one converter when determining a low-load in order to improve efficiency. In addition, a target converter channel may be selected using a random function or determined to be changed using a previous operation history without specifying a target converter channel in advance at an initial stage of the PFC operation so as not to add a stress to any one converter switch.
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公开(公告)号：US20180367024A1
公开(公告)日：2018-12-20
申请号：US15739925
申请日：2016-06-24
Applicant: LG ELECTRONICS INC.
Inventor： Kyeongtae KIM , Yonghwa LEE , Jeongeon OH
CPC classification number: H02M1/12 , F24F11/88 , F24F11/89 , H01F30/12 , H02M1/143 , H02M1/15 , H02M1/4225 , H02M3/07 , H02M5/451 , H02M5/458 , H02M7/48 , H02M7/5395 , H02M2001/0009 , H02M2001/007 , H02M2003/1566 , H02M2003/1586
Abstract: The present invention relates to a power conversion device and an air conditioner comprising the same. The power conversion device according to one embodiment of the present invention comprises: a rectification unit for rectifying input alternating current power; a boost converter for boosting power rectified from the rectification unit and outputting the same; a dc-end capacitor connected to an output end of the boost converter; an inductor current detection unit for detecting an inductor current flowing in an inductor within the boost converter; a dc-end voltage detection unit for detecting voltages of both ends of the dc-end capacitor; and a control unit for controlling the boost converter, wherein the control unit generates and outputs a converter switching control signal by performing proportional resonant control for a duty command value of a switching element within the boost converter, on the basis of the detected inductor current and dc-end voltage. Therefore, a harmonic current component flowing through a dc-end capacitor induced by a ripple component of an input voltage can be reduced.
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公开(公告)号：US20230155487A1
公开(公告)日：2023-05-18
申请号：US17952832
申请日：2022-09-26
Applicant: LG Electronics Inc.
Inventor： Phillsik GONG , Songhee YANG , Jeongeon OH , Sanghyeon KIM
CPC classification number: H02M1/4258 , F04B35/04 , F04B49/06 , H02M1/0009 , H02P27/06 , H02P6/08 , H02M1/083 , F04B2203/0208 , F04B2203/0209 , F04B2203/0201
Abstract: The present disclosure discloses a power transforming apparatus capable of reducing a stress of a converter switch during a PFC operation, an operation method thereof, and an air conditioner including the same. To this end, the power transforming apparatus according to the present disclosure may determine the number of converters for performing a PFC operation based on a magnitude of input power and a speed of the motor. Furthermore, target converter channels are arbitrarily selected using a random function at an initial stage of a PFC operation so as not to add a stress to a switch device of any one converter. In addition, in order to disperse a stress to all switches, phases are individually controlled to perform switching operations while changing converters that match the number of converters for performing a PFC operation in a preset cycle, for example, whenever a zero-crossing is detected.
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公开(公告)号：US20180191279A1
公开(公告)日：2018-07-05
申请号：US15855012
申请日：2017-12-27
Applicant: LG ELECTRONICS INC.
Inventor： Yonghwa LEE , Donggeun LEE , Jeongeon OH
CPC classification number: H02P6/17 , H02P6/18 , H02P21/24 , H02P27/08 , H02P27/085
Abstract: Provided are a motor control device and a method for controlling a motor control device. A switching frequency is varied with respect to a control sampling for controlling an inverter, whereby controlling is performed by securing a required control sampling according to a motor speed.
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Patent Agency Ranking
公开(公告)号：US20220220966A1
公开(公告)日：2022-07-14
申请号：US17570910
申请日：2022-01-07
Applicant: LG Electronics Inc.
Inventor： Yonghwa LEE , Sanghyeon KIM , Jeongeon OH
Abstract: The present disclosure relates to a motor driving apparatus and an air conditioner including the same. The motor driving apparatus and the air conditioner including the same according to an embodiment of the present disclosure include: a switching device disposed between an inverter and a motor; and a controller, which in response to windings of the motor being switched from a first connection to a second connection, controls an operating frequency of the motor to be less than or equal to a first frequency, and in response to the windings of the motor being switched from the second connection to the first connection, controls an operating frequency of the motor to be less than or equal to a second frequency which is less than the first frequency. Accordingly, burnout of the switching device for switching connection of the motor windings may be prevented.
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公开(公告)号：US20220205673A1
公开(公告)日：2022-06-30
申请号：US17563492
申请日：2021-12-28
Applicant: LG Electronics Inc.
Inventor： Yonghwa LEE , Yongsoo CHO , Jeongeon OH
Abstract: The present disclosure relates to a motor driving apparatus and an air conditioner including the same. The motor driving apparatus and the air conditioner including the same according to an embodiment of the present disclosure include: a switching device disposed between an inverter and a motor, wherein while windings of the motor are connected in a first connection, an output current at a first level is output from the inverter, and while the windings of the motor are connected in a second connection, the output current at the first level is output from the inverter, such that it is possible to determine whether the switching device for switching connection of the motor is abnormal.
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公开(公告)号：US20220224276A1
公开(公告)日：2022-07-14
申请号：US17574879
申请日：2022-01-13
Applicant: LG Electronics Inc.
Inventor： Yonghwa LEE , Songhee YANG , Jeongeon OH
IPC: H02P29/028 , H02P27/08 , F24F1/20
Abstract: A motor driving device and an air conditioner having the same of the present disclosure limits the switching of a winding switching device when there is a possibility that the winding switching device is deteriorated, in order to increase the life of winding switching device of a motor and prevent malfunction.
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公开(公告)号：US20180226881A1
公开(公告)日：2018-08-09
申请号：US15741227
申请日：2016-06-30
Applicant: LG ELECTRONICS INC.
Inventor： Seungwoo CHAE , Sanghyeon KIM , Jeongeon OH
Abstract: The present invention relates to a power conversion device and an air conditioner comprising the same. The power conversion device according to one embodiment of the present invention comprises: an interleaved boost converter; a dc terminal capacitor connected to an output terminal of the interleaved boost converter; a load connected to the dc terminal capacitor; and a controller for controlling the interleaved boost converter, wherein the controller controls the phase difference between a first boost converter and second boost converter of the interleaved boost converter so that the phase difference is a first phase difference in a first mode, and if a current ripple flowing in the dc terminal capacitor is a predetermined value or greater, the controller enters a second mode and controls the phase difference between the first boost converter and second boost converter of the interleaved boost converter so that the phase difference varies. Accordingly, the ripple current flowing into a capacitor disposed at the output terminal of an interleaved boost converter can be reduced.
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公开(公告)号：US20180191286A1
公开(公告)日：2018-07-05
申请号：US15858777
申请日：2017-12-29
Applicant: LG ELECTRONICS INC.
Inventor： Donggeun LEE , Kyeongtae KIM , Jeongeon OH
CPC classification number: H02P23/26 , H02M1/12 , H02M1/4216 , H02M1/425 , H02M2001/0022 , H02M2001/0025 , H02P27/08 , Y02B70/126
Abstract: Provided are a motor control device and a method for controlling a motor control device. Harmonics of an input current may be reduced by adjusting an output of an inverter.
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