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公开(公告)号：US20200182231A1
公开(公告)日：2020-06-11
申请号：US16703491
申请日：2019-12-04
Applicant: LG Electronics Inc.
Inventor： Daegeun PARK , Nayi RYU , Sungjin LIM
Abstract: A linear compressor includes, a cylinder, a piston configured to reciprocate inside the cylinder, a motor configured to supply driving force to the piston, a detector configured to detect a motor current and a motor voltage that are applied to the motor, and a controller configured to estimate a stroke of the piston based on the motor current and the motor voltage and to determine a phase difference between the stroke and the motor current. The controller is configured to detect operation information of the linear compressor, determine whether to perform a resonance operation based on the operation information, and control operation of the motor to allow the phase difference to be within a preset phase range.
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公开(公告)号：US20170122306A1
公开(公告)日：2017-05-04
申请号：US15335800
申请日：2016-10-27
Applicant: LG ELECTRONICS INC.
Inventor： Jongyoon CHOI , Sungjin LIM , Nayi RYU , Chaehong LIM , Seunggeun BAEK , Hyeongseok KIM
CPC classification number: F04B49/12 , F04B35/04 , F04B35/045 , F04B39/0027 , F04B39/126 , F04B49/065 , F04B49/14 , F04B53/12 , F04B53/162 , F04B2203/0401 , F04B2203/0402
Abstract: A linear compressor and a method for controlling a compressor are provided. The compressor may include a piston that reciprocates within a cylinder, a linear motor that supplies a driving force to the piston, a discharge device through which a refrigerant compressed in the cylinder by the reciprocating motion of the piston is discharged, a pressure changing device that changes a variation rate of pressure applied to the piston before the piston reaches a virtual discharge surface (VDS) during the reciprocating motion, to prevent collision between the piston and the discharge device. The virtual discharge surface may be formed on at least a portion of the discharge device facing a compression space within the cylinder.
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Patent Agency Ranking
公开(公告)号：US20200056603A1
公开(公告)日：2020-02-20
申请号：US16545541
申请日：2019-08-20
Applicant: LG ELECTRONICS INC.
Inventor： Nayi RYU , Chulgi ROH , Gahyun OH
IPC: F04B35/04
Abstract: A linear compressor according to the present disclosure may include a cylinder provided with at least one groove, a piston reciprocating within the cylinder, a motor configured to provide a driving force to move the piston within the cylinder, an inverter configured to perform a switching operation to transmit electric power to the motor, and a controller configured to receive temperature information from the electronic device and control the inverter to preheat the motor based on the received temperature information.
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公开(公告)号：US20180195509A1
公开(公告)日：2018-07-12
申请号：US15857369
申请日：2017-12-28
Applicant: LG Electronics Inc.
Inventor： Sungjin LIM , Gyunam KIM , Nayi RYU
CPC classification number: F04B49/065 , F04B35/04 , F04B49/06 , F04B49/22 , F04B2201/0201 , F04B2203/0401 , F04B2203/0402 , G05B17/02
Abstract: Provided is a linear compressor capable of reducing noise and manufacturing cost. The linear compressor includes a piston reciprocating within a cylinder, a motor providing a driving force for movement of the piston, a sensing unit sensing a motor voltage and a motor current related to the motor, a discharge part installed at one end of the cylinder and adjusting discharge of a refrigerant compressed within the cylinder, and a controller detecting a load variation of the motor using at least one of the motor voltage and the motor current, calculating a compensation value related to a position of the piston each time a load variation of the motor is detected, and detecting an absolute position of the piston using the calculated compensation value.
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公开(公告)号：US20150176579A1
公开(公告)日：2015-06-25
申请号：US14570550
申请日：2014-12-15
Applicant: LG ELECTRONICS INC.
Inventor： Sungjin LIM , Nayi RYU , Sungho PARK
CPC classification number: F04B49/06 , F04B35/04 , F04B35/045 , F04B49/065 , F04B2203/0401 , F04B2203/0402 , F25B31/023 , F25B49/022
Abstract: The control module includes a drive circuitry that drives the linear compressor based on a control signal, a detector that detects a motor current and a motor voltage corresponding to a motor of the linear compressor, an asymmetric current generator that generates an asymmetric motor current by applying a current offset to the detected motor current, and a controller that generates the control signal based on the asymmetric motor current and the detected motor voltage. Such a control module may increase a maximum freezing capacity by appropriately (or optimally) designing (setting) an initial value of a piston in a driving area or an operation area (or a high-efficiency driving area) of a compressor by considering the efficiency aspect, and executing an asymmetric operation in a high-load driving area (or a high freezing capacity driving area).
Abstract translation: 控制模块包括驱动电路，其基于控制信号驱动线性压缩机，检测器检测电动机电流和对应于线性压缩机的电动机的电动机电压，通过应用产生不对称电动机电流的非对称电流发生器 对检测到的电动机电流的电流偏移，以及基于不对称电动机电流和检测到的电动机电压产生控制信号的控制器。 这样的控制模块可以通过考虑效率来适当（或最佳地）设计（设定）压缩机的驱动区域或操作区域（或高效率驱动区域）中的活塞的初始值来增加最大冻结能力 并且在高负载驱动区域（或高容量驱动区域）中执行非对称操作。
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公开(公告)号：US20210108844A1
公开(公告)日：2021-04-15
申请号：US16603123
申请日：2018-04-04
Applicant: LG Electronics Inc.
Inventor： Nayi RYU
Abstract: Disclosed herein are a compressor driving apparatus and a refrigerator including the same. A compressor driving apparatus includes: a plurality of switching elements; an inverter for converting direct current (DC) power into alternating current (AC) power according to a switching operation to output the converted AC power to the motor; an output current detector for detecting an output current flowing through the motor; and an inverter controller for controlling the inverter based on the output current, wherein the inverter controller controls the piston so that one end of the piston is fixed at a first position spaced apart from the discharge unit at stroke of the piston during a first period, controls the piston to collide with the discharge unit when a change rate in an operation rate or a position error of the compressor is equal to or greater than a predetermined value, and controls the piston so that the one end of the piston is fixed at a second position spaced apart from the discharge unit at stroke of the piston during a second period after the collision of the piston. Accordingly, control accuracy may be improved and a noise may be reduced upon piston position based operation control.
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公开(公告)号：US20170152850A1
公开(公告)日：2017-06-01
申请号：US15361117
申请日：2016-11-25
Applicant: LG ELECTRONICS INC.
CPC classification number: F04B49/20 , F04B35/04 , F04B35/045 , F04B39/0005 , F04B49/065 , F04B2201/0201 , F04B2203/0401 , F04B2203/0402 , F25B31/023 , F25B49/022 , F25B49/025 , F25B2400/073 , F25B2500/19 , F25B2600/021 , F25B2700/21175 , Y02B30/741
Abstract: Disclosed are a compressor applied to a refrigerator not having a cycle matching function or a refrigerator not including a controller, and capable of controlling a driving of a linear motor by the compressor itself, and a method for controlling the same. The compressor installed at an apparatus including a refrigeration cycle includes: a piston which reciprocates in a cylinder; a linear motor configured to provide a driving force to move the piston; a sensor configured to sense a motor current of the linear motor; and a compressor controller configured to detect information related to a load of the apparatus, in a separated manner from a controller which controls a body of the apparatus, wherein the compressor controller calculates a phase difference between a stroke of the piston and the sensed motor current, and wherein the compressor controller controls a driving of the linear motor in correspondence to the detected load, such that the calculated phase difference is within a range of a reference phase difference.
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