公开(公告)号：US20020051710A1

公开(公告)日：2002-05-02

申请号：US09962076

申请日：2001-09-26

Applicant: LG Electronics Inc.

Inventor： Jae Yoo Yoo ,  Hyung Jin Kim ,  Kye Si Kwon

IPC: F04B049/00

CPC classification number: F04B49/065 ,  F04B2201/0206 ,  F04B2203/0401 ,  F04B2203/0402

Abstract: In an apparatus and a method for controlling operation of a reciprocating compressor which is capable of operating a compressor stably by detecting a phase difference and using an inflection point of the phase difference, an apparatus and a method for controlling operation of a reciprocating compressor including an electric circuit unit operating a reciprocating compressor by varying a stroke with motion of a piston, a phase difference detecting unit detecting a phase difference of a current and a voltage from the electric circuit unit, a phase inflection point detecting unit detecting a phase inflection point by being inputted the phase difference, and a stroke controlling unit being inputted the detected phase inflection point from the phase inflection point detecting unit and applying a voltage to the electric circuit unit in order to make the stroke correspond to the phase inflection point can control a TDC of a piston regardless of load variation, improve an operation efficiency of a reciprocating compressor, and because a stroke calculating circuit is not required, there is no stroke calculating error according to the motor constant variation, in addition, it is possible to operate a reciprocating compressor by corresponding instantly to a load and operate the reciprocating compressor in a safe region in sensing of an overload by grasping the present load condition using a reference value of a phase difference.

Abstract translation: 在能够通过检测相位差并使用相位差的拐点来稳定地运行压缩机的往复式压缩机的运转控制装置和方法中，包括： 电路单元，其通过活塞的运动改变行程来操作往复式压缩机;相位差检测单元，其检测来自所述电路单元的电流的相位差和电压;相位拐点检测单元，其检测相位拐点; 输入相位差，并且行程控制单元从相位拐点检测单元输入检测到的相位拐点并向电路单元施加电压以使笔画与相位拐点相对应可以控制TDC 无论负载变化如何，提高了运行效率o 往复式压缩机，并且由于不需要行程计算电路，所以根据电动机常数变化不存在行程计算误差，另外可以将往复式压缩机立即对应于负载进行操作，并将往复式压缩机 通过使用相位差的参考值来掌握当前负载条件来检测过载的安全区域。

公开(公告)号：US20020064461A1

公开(公告)日：2002-05-30

申请号：US09984050

申请日：2001-10-26

Applicant: LG ELECTRONICS INC.

Inventor： Jae Yoo Yoo ,  Jae Chun Lee ,  Min Kyu Hwang ,  Chel Woong Lee

IPC: F04B049/06

CPC classification number: F04B35/045 ,  F04B49/065 ,  F04B2201/0206 ,  F04B2203/0401 ,  F04B2203/0402

Abstract: Disclosed is a circuit for driving a linear compressor enabling to reduce a cost in detecting voltage and current applied to a linear compressor by decreasing he number of precision resistors. The present invention includes a linear compressor controlling a cooling capacity by varying a stroke through an up-and-down straight-line motion of a piston, an electric circuit part supplying the linear compressor with voltage and current in accordance with a switching signal of an AC switching device through a current detect resistor and the AC switching device wherein a ground terminal is connected between the current detect resistor and linear compressor, a voltage detection unit detecting the voltage applied to the linear compressor by taking the ground terminal as a reference and outputting the detected voltage, a stroke calculation unit receiving the detected current and voltage to calculate the stroke, a speed or an acceleration speed of the linear compressor, and a microcomputer inputting a switching signal for controlling the voltage applied to the linear compressor into the switching device to make a present stroke follow an initial stroke reference.

Abstract translation: 公开了一种用于驱动线性压缩机的电路，其能够通过减少精密电阻器的数量来降低检测施加到线性压缩机的电压和电流的成本。 本发明包括线性压缩机，其通过活塞的上下直线运动改变行程来控制冷却能力，电路部分根据一个活塞的切换信号向线性压缩机提供电压和电流 交流开关装置，通过电流检测电阻器和交流开关装置，其中接地端子连接在电流检测电阻器和线性压缩机之间，电压检测单元通过以接地端子作为参考来检测施加到线性压缩机的电压，并输出 所述检测电压，行程计算单元，接收所检测的电流和电压以计算所述行程，所述线性压缩机的速度或加速度;以及微型计算机，将用于控制施加到所述线性压缩机的电压的开关信号输入到所述开关装置 使当前行程跟随初始笔画参考。

公开(公告)号：US20040067140A1

公开(公告)日：2004-04-08

申请号：US10385475

申请日：2003-03-12

Applicant: LG Electronics Inc.

Inventor： Jae Yoo Yoo ,  Chel Woong Lee ,  Ji Won Sung ,  Kyuk Lee

IPC: F04B049/06

CPC classification number: F04B49/06 ,  F04B35/045 ,  F04B2201/0206 ,  F04B2203/0401 ,  F04B2203/0402 ,  G05B2219/43182

Abstract: In an apparatus and a method for controlling operation of a compressor, by removing deviation generated by resistance and inductance and removing an error in a stroke estimation value of a compressor, operation of the compressor can be accurately controlled. The apparatus includes a counter electromotive force detector for detecting a counter electromotive force generated at a motor of a compressor. A stroke calculator calculates a stroke estimation value of the compressor on the basis of the counter electromotive force, and a stroke controller controls a stroke of the compressor by varying a voltage applied to the motor on the basis of the calculated stroke estimation value and a stroke reference value.

Abstract translation: 在用于控制压缩机的操作的装置和方法中，通过消除由电阻和电感产生的偏差并消除压缩机的行程估计值中的误差，可以精确地控制压缩机的操作。 该装置包括用于检测在压缩机的电动机处产生的反电动势的反电动势检测器。 行程计算器基于反电动势计算压缩机的行程估计值，并且行程控制器基于计算的行程估计值和行程来改变施加到电动机的电压来控制压缩机的行程 参考值。

公开(公告)号：US20040066163A1

公开(公告)日：2004-04-08

申请号：US10406307

申请日：2003-04-04

Applicant: LG Electronics Inc.

Inventor： Jae Yoo Yoo ,  Chel Woong Lee ,  Ji Won Sung ,  Hyuk Lee

IPC: G05D023/275

CPC classification number: F04B35/045 ,  F04B49/06 ,  F04B2201/0206 ,  F04B2203/0401 ,  F04B2203/0402

Abstract: An apparatus and a method are disclosed for controlling operation of a compressor capable of greatly decreasing a stroke estimation error of a compressor and controlling operation of the compressor accurately and precisely. The method includes calculating a first stroke estimation value of a compressor on the basis of current, a voltage applied to a motor of a compressor and preset parameters of the motor. Detecting a counter electromotive force of the motor and calculating a second stroke estimation value of the compressor on the basis of the detected counter electromotive force value. Determining a new stroke reference value by comparing the first stroke estimation value with the second stroke estimation value, adding or subtracting a stroke compensation value corresponding to the comparison result to or from a preset stroke reference value, and controlling a stroke of the compressor by varying a voltage applied to the motor on the basis of the determined stroke reference value and the first stroke estimation value.