KR20030069711A - Driving control apparatus for reciprocating compressor - Google Patents

Driving control apparatus for reciprocating compressor Download PDF

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Publication number
KR20030069711A
KR20030069711A KR1020020009650A KR20020009650A KR20030069711A KR 20030069711 A KR20030069711 A KR 20030069711A KR 1020020009650 A KR1020020009650 A KR 1020020009650A KR 20020009650 A KR20020009650 A KR 20020009650A KR 20030069711 A KR20030069711 A KR 20030069711A
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South Korea
Prior art keywords
compressor
switch
triac
load
microcomputer
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KR1020020009650A
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Korean (ko)
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KR100438620B1 (en
Inventor
허종태
박용돌
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엘지전자 주식회사
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Priority to KR10-2002-0009650A priority Critical patent/KR100438620B1/en
Publication of KR20030069711A publication Critical patent/KR20030069711A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F04B49/065—Control using electricity and making use of computers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/12—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2203/00—Motor parameters
    • F04B2203/04—Motor parameters of linear electric motors
    • F04B2203/0402—Voltage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2207/00—External parameters
    • F04B2207/01—Load in general
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2207/00—External parameters
    • F04B2207/04—Settings
    • F04B2207/046—Settings of length of piston stroke

Abstract

PURPOSE: An apparatus for controlling driving of a reciprocating compressor is provided to reduce harmonic wave loss generated in a triac. CONSTITUTION: An apparatus comprises a first switch(SW1) connected with a fixed middle tap of a secondary winding of a transformer(10) and a triac(20), controlled by a microcomputer(40) to be turned on and off, and impressing low voltage to the triac; a second switch(SW2) connected with the secondary winding of the transformer and the triac, controlled by the microcomputer to be turned on/off, and impressing high voltage to the triac; and the microcomputer detecting load of a compressor(30), and controlling switching of the first switch and the second switch depending on the load. The microcomputer turns on the first switch and turns off the second switch if the compressor is under normal load, and turns off the first switch and turns on the second switch if the compressor is under over-load or under-load. The compressor is driven with low voltage under normal load, and with high voltage only under over-load to remove harmonic wave generated on switching so as to improve efficiency of the compressor.

Description

왕복동식 압축기의 구동제어장치{DRIVING CONTROL APPARATUS FOR RECIPROCATING COMPRESSOR}DRIVING CONTROL APPARATUS FOR RECIPROCATING COMPRESSOR}

본 발명은 왕복동식 압축기의 구동제어장치에 관한 것으로, 특히 압축기의 부하에 따라 트라이악에 인가되는 전압을 가변하여 그 트라이악에서 발생하는 고조파손실을 저감하도록 한 왕복동식압축기의 구동제어장치에 관한 것이다.The present invention relates to a drive control device for a reciprocating compressor, and more particularly, to a drive control device for a reciprocating compressor to vary the voltage applied to the triac according to the load of the compressor to reduce harmonic losses generated in the triac. will be.

일반적으로, 왕복동식압축기는, 220V의 전원으로부터 스트로크를 제어하기 위하여, 일정한 위상각 만큼 전압을 단속하여 제어하는데, 이와같은 종래 기술을 첨부한 도면을 참조하여 설명한다.In general, the reciprocating compressor controls the stroke by a constant phase angle in order to control the stroke from a 220 V power source, which will be described with reference to the accompanying drawings.

도1은 종래 왕복동식압축기의 구동제어장치에 대한 구성을 보인 회로도로서, 이에 도시된 바와같이 220V의 전원을 일정 권선비로 변압하여 트라이악(20)에 인가하는 변압기(10)와; 상기 변압기(10)에서 인가된 소정 전압을 마이크로컴퓨터(40)의 스위칭 제어신호에 의해 스위칭하여 그에 따른 단속전압을 압축기(30)에 인가하는 트라이악(20)과; 상기 압축기(30)의 부하에 따라, 상기 트라이악(20)의 스위칭을 제어하기 위한 스위칭제어신호를 출력하는 마이크로컴퓨터(40)로 구성되며, 이와같이 구성된 종래 장치의 동작을 설명한다.1 is a circuit diagram showing a configuration of a drive control apparatus of a conventional reciprocating compressor, and as shown therein, a transformer 10 for converting a power of 220V at a constant turns ratio and applying it to the triac 20; A triac 20 for switching a predetermined voltage applied from the transformer 10 by a switching control signal of the microcomputer 40 and applying an intermittent voltage to the compressor 30 accordingly; According to the load of the compressor 30, the microcomputer 40 which outputs a switching control signal for controlling the switching of the triac 20 will be described.

먼저, 변압기(10)는 220V의 전원을 일정 권선비로 변압하여 트라이악(20)에 인가하고, 마이크로컴퓨터(40)는 압축기(30)의 부하를 검출하여 그에 따라 트라이악(20)의 스위칭을 제어하기 위한 스위칭제어신호를 트라이악(20)의 게이트에 인가한다.First, the transformer 10 transforms a power supply of 220V at a constant turns ratio and applies it to the triac 20, and the microcomputer 40 detects a load of the compressor 30 and accordingly switches the triac 20. A switching control signal for controlling is applied to the gate of the triac 20.

이에 따라, 상기 트라이악(20)은 스위칭제어신호에 의해 스위칭되어, 상기 변압기(10)의 출력전압을 단속하여 압축기(30)에 인가하고, 이에 따라 상기 압축기 (30)는 단속전압에 의해 구동된다.Accordingly, the triac 20 is switched by a switching control signal to interrupt the output voltage of the transformer 10 and apply it to the compressor 30, whereby the compressor 30 is driven by the interrupted voltage. do.

이때, 상기 단속전압에서 발생하는 고조파 손실은 전체 제어손실중 50~70%정도로서, 이러한 고조파 손실은 압축기의 효율을 상당히 저하시킨다.At this time, the harmonic loss generated at the interrupted voltage is about 50 to 70% of the total control loss, and such harmonic loss considerably lowers the efficiency of the compressor.

즉, 220V의 전원으로부터 스트로크를 제어하기 위하여 일정한 위상각 만큼을 전력소자를 이용하여 전압을 단속할때, 그 단속된 전압에서 발생하는 고조파손실에 의해 압축기의 효율이 저하되는 문제점이 있다.That is, when the voltage is interrupted by the power element by a certain phase angle to control the stroke from the 220V power supply, there is a problem that the efficiency of the compressor is lowered by the harmonic loss generated at the interrupted voltage.

본 발명은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로, 압축기의 부하에 따라 트라이악에 인가되는 전압을 가변하여 그 트라이악에서 발생하는 고조파손실을 저감하도록 한 왕복동식압축기의 구동제어장치를 제공함에 그 목적이 있다.The present invention has been made to solve the above problems, to provide a drive control apparatus for a reciprocating compressor to vary the voltage applied to the triac according to the load of the compressor to reduce the harmonic loss generated in the triac. Has its purpose.

도1은 종래 왕복동식 압축기의 구동제어장치에 대한 구성을 보인 회도도.1 is a circuit diagram showing a configuration of a drive control apparatus of a conventional reciprocating compressor.

도2는 본 발명 왕복동식 압축기의 구동제어장치에 대한 구성을 보인 회로도.Figure 2 is a circuit diagram showing a configuration for a drive control device of the reciprocating compressor of the present invention.

*****도면의 주요부분에 대한 부호의 설명********** Description of the symbols for the main parts of the drawings *****

10:변압기20:트라이악10: Transformer 20: Triac

30:압축기40:마이크로컴퓨터30: Compressor 40: Microcomputer

상기와 같은 목적을 달성하기 위한 본 발명은 왕복동식압축기의 구동제어장치에 있어서, 변압기의 2차측 권선의 소정 중간탭과 트라이악 사이에 연결되고, 마이크로컴퓨터에 의해 온/오프 제어되어, 낮은 인가전압을 상기 트라이악에 인가하는 제1 스위치와; 상기 변압기의 2차측 권선과 트라이악 사이에 연결되고, 마이크로컴퓨터에 의해 온/오프 제어되어, 높은 인가전압을 상기 트라이악에 인가하는 제2 스위치와; 압축기의 부하를 검출하여, 그 부하에 따라, 상기 제1,제2 스위치의스위칭을 제어하는 마이크로컴퓨터로 구성한 것을 특징으로 한다.In order to achieve the above object, the present invention provides a drive control apparatus for a reciprocating compressor, which is connected between a predetermined intermediate tap of a secondary winding of a transformer and a triac, and is controlled on and off by a microcomputer, thereby applying low A first switch for applying a voltage to the triac; A second switch connected between the secondary winding of the transformer and the triac, and controlled on / off by a microcomputer to apply a high applied voltage to the triac; And a microcomputer for detecting the load of the compressor and controlling the switching of the first and second switches in accordance with the load.

상기 마이크로컴퓨터는, 압축기가 정상 부하 상태이면, 제1 스위치는 턴온,제2 스위치는 턴오프시키고, 압축기가 과부하 상태이거나 저부하상태이면, 제1 스위치는 턴오프,제2 스위치는 턴온시키도록 제어하는 것을 특징으로 한다.The microcomputer is configured to turn on the first switch when the compressor is in a normal load state, turn off the second switch, and turn off the first switch when the compressor is overloaded or underload, and turn on the second switch. It is characterized by controlling.

이하, 본 발명에 의한 왕복동식압축기의 구동제어장치에 대한 작용 및 효과를 첨부한 도면을 참조하여 상세히 설명한다.Hereinafter, with reference to the accompanying drawings, the operation and effect of the drive control apparatus of the reciprocating compressor according to the present invention will be described in detail.

도2는 본 발명 왕복동식압축기의 구동제어장치에 대한 구성을 보인 회로도로서, 이에 도시한 바와같이 변압기(10)의 2차측 권선의 소정 중간탭과 트라이악(20) 사이에 연결되고, 마이크로컴퓨터(40)에 의해 온/오프 제어되어, 낮은 인가전압을 상기 트라이악(20)에 인가하는 제1 스위치(SW1)와; 상기 변압기(10)의 2차측 권선과 트라이악(20) 사이에 연결되고, 마이크로컴퓨터(40)에 의해 온/오프 제어되어, 높은 인가전압을 상기 트라이악(20)에 인가하는 제2 스위치(SW2)와; 압축기(30)의 부하를 검출하여, 그 부하에 따라, 상기 제1,제2 스위치(SW1,SW2)의 스위칭을 제어하는 마이크로컴퓨터(40)로 구성하며, 이와같이 구성한 본 발명의 동작을 설명한다.Fig. 2 is a circuit diagram showing the configuration of the drive control apparatus of the reciprocating compressor of the present invention. As shown therein, a microcomputer is connected between a predetermined intermediate tap of a secondary winding of a transformer 10 and a triac 20. A first switch SW1 controlled on / off by 40 to apply a low applied voltage to the triac 20; A second switch connected between the secondary winding of the transformer 10 and the triac 20 and controlled on / off by the microcomputer 40 to apply a high applied voltage to the triac 20; SW2); The operation of the present invention constituted by the microcomputer 40 which detects the load of the compressor 30 and controls the switching of the first and second switches SW1 and SW2 in accordance with the load will be described. .

먼저, 변압기(10)는 220V의 전원을 소정 권선비로 변압하여 트라이악(10)에 인가하는데, 만약, 마이크로컴퓨터(40)가 압축기(30)의 현재 부하가 정상부하로 판단하면, 그 마이크로컴퓨터(40)의 제어신호에 의해 제1 스위치(SW1)가 온되고, 제2 스위치(SW2)는 오프되어, 상기 변압기(10)는 낮은 전압을 트라이악(20)에 인가한다.First, the transformer 10 transforms a power of 220V to a predetermined turns ratio and applies it to the triac 10. If the microcomputer 40 determines that the current load of the compressor 30 is a normal load, the microcomputer The first switch SW1 is turned on by the control signal of 40, the second switch SW2 is turned off, and the transformer 10 applies a low voltage to the triac 20.

이후, 상기 트라이악(20)은, 마이크로컴퓨터(40)의 스위칭제어신호에 의해 스위칭되어, 상기 변압기(10)와 제1 스위치(SW1)를 통해 인가되는 낮은 전압을 단속하여 그 단속전압을 압축기(30)에 인가하고, 이에 따라 상기 압축기(30)는 단속전압에 의해 구동된다.Thereafter, the triac 20 is switched by a switching control signal of the microcomputer 40 to interrupt the low voltage applied through the transformer 10 and the first switch SW1 to compress the intermittent voltage. 30, the compressor 30 is driven by an intermittent voltage.

한편, 마이크로컴퓨터(40)는, 압축기(30)의 현재 부하가 과부하로 판단되면, 제2 스위치(SW2)를 온시키고, 제1 스위치(SW1)는 오프시켜 높은 전압을 트라이악 (20)에 인가하고, 이에 의해 상기 트라이악(20)은, 마이크로컴퓨터(40)의 제어신호에 의해 스위칭되어, 상기 변압기(10)와 제2 스위치(SW2)를 통해 인가되는 높은 전압을 단속하여 그 단속전압을 압축기(30)에 인가하며, 이에 따라 상기 압축기(30)는 단속전압에 의해 구동된다.On the other hand, when it is determined that the current load of the compressor 30 is overloaded, the microcomputer 40 turns on the second switch SW2 and turns off the first switch SW1 to turn the high voltage to the triac 20. The triac 20 is thereby switched by the control signal of the microcomputer 40 to interrupt the high voltage applied through the transformer 10 and the second switch SW2, thereby interrupting the high voltage. Is applied to the compressor (30), whereby the compressor (30) is driven by an intermittent voltage.

즉, 본 발명은, 높은 전압이 트라이악에 의해 스위칭되는 경우에는 많은 고조파가 발생하고, 낮은 전압이 트라이악에 의해 스위칭되는 경우에는 적은 고조파가 발생하므로, 정상부하에서는 낮은 전압으로 압축기를 구동하다가 과부하인 경우에만 높은 전압으로 압축기를 구동함으로써 스위칭시 발생하는 고조파를 제거하여 압축기의 효율을 향상한다.That is, in the present invention, when a high voltage is switched by a triac, a lot of harmonics are generated, and when a low voltage is switched by a triac, a little harmonic is generated. In this case, the compressor is operated at a high voltage to remove harmonics generated during switching, thereby improving the efficiency of the compressor.

상기 본 발명의 상세한 설명에서 행해진 구체적인 실시 양태 또는 실시예는 어디까지나 본 발명의 기술 내용을 명확하게 하기 위한 것으로 이러한 구체적 실시예에 한정해서 협의로 해석해서는 안되며, 본 발명의 정신과 다음에 기재된 특허 청구의 범위내에서 여러가지 변경 실시가 가능한 것이다.The specific embodiments or examples made in the detailed description of the present invention are intended to clarify the technical contents of the present invention to the extent that they should not be construed as limited to these specific embodiments and should not be construed in consultation. Various changes can be made within the scope of.

이상에서 상세히 설명한 바와같이 본 발명은, 압축기의 부하에 따라 트라이악에 인가되는 전압을 가변하여 그 트라이악에서 발생하는 고조파손실을 저감함으로써, 압축기의 효율을 향상시키는 효과가 있다.As described in detail above, the present invention has the effect of improving the efficiency of the compressor by varying the voltage applied to the triac according to the load of the compressor to reduce the harmonic loss generated in the triac.

Claims (2)

왕복동식 압축기의 구동제어장치에 있어서,In the drive control apparatus of the reciprocating compressor, 변압기의 2차측 권선의 소정 중간탭과 트라이악 사이에 연결되고, 마이크로컴퓨터에 의해 온/오프 제어되어, 낮은 인가전압을 상기 트라이악에 인가하는 제1 스위치와;A first switch connected between the triac and a predetermined intermediate tap of the secondary winding of the transformer, the first switch being on / off controlled by a microcomputer to apply a low applied voltage to the triac; 상기 변압기의 2차측 권선과 트라이악 사이에 연결되고, 마이크로컴퓨터에 의해 온/오프 제어되어, 높은 인가전압을 상기 트라이악에 인가하는 제2 스위치와;A second switch connected between the secondary winding of the transformer and the triac, and controlled on / off by a microcomputer to apply a high applied voltage to the triac; 압축기의 부하를 검출하여, 그 부하에 따라, 상기 제1,제2 스위치의 스위칭을 제어하는 마이크로컴퓨터로 구성한 것을 특징으로 하는 왕복동식압축기의 구동제어장치.A drive control apparatus for a reciprocating compressor comprising a microcomputer for detecting a load of a compressor and controlling switching of the first and second switches according to the load. 제1 항에 있어서, 마이크로컴퓨터는, 압축기가 정상 부하 상태이면, 제1 스위치는 턴온,제2 스위치는 턴오프시키고, 압축기가 과부하 상태이거나 저부하상태이면, 제1 스위치는 턴오프, 제2 스위치는 턴온시키도록 제어하는 것을 특징으로 하는 왕복동식압축기의 구동제어장치.The method of claim 1, wherein the microcomputer is configured to: turn on the first switch if the compressor is in a normal load state, turn off the second switch, and turn off the first switch if the compressor is in an overload or low load state. A drive control apparatus for a reciprocating compressor, characterized in that the switch is controlled to turn on.
KR10-2002-0009650A 2002-02-22 2002-02-22 Driving control apparatus for reciprocating compressor KR100438620B1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100588719B1 (en) * 2004-08-30 2006-06-12 엘지전자 주식회사 Controlling apparatus of linear compressor and its method
KR100690664B1 (en) * 2005-05-06 2007-03-09 엘지전자 주식회사 Driving control method for reciprocating compressor
US7323845B2 (en) 2004-06-03 2008-01-29 Lg Electronics Inc. Apparatus for controlling operation of compressor and method therefore
WO2022105738A1 (en) * 2020-11-19 2022-05-27 海尔智家股份有限公司 Variable capacity drive circuit for linear compressor in refrigerating electrical appliance

Family Cites Families (4)

* Cited by examiner, † Cited by third party
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KR0162459B1 (en) * 1995-12-31 1999-03-20 구자홍 Digital linear compressor control apparatus & its production method
JP2001016884A (en) * 1999-06-30 2001-01-19 Kawasaki Steel Corp Method for controlling prevention of overcurrent accident in motor
JP2002005035A (en) * 2000-06-20 2002-01-09 Matsushita Electric Ind Co Ltd Drive unit for liner compressor
KR100374835B1 (en) * 2000-12-08 2003-03-04 엘지전자 주식회사 Trip prevention apparatus for linear compressor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7323845B2 (en) 2004-06-03 2008-01-29 Lg Electronics Inc. Apparatus for controlling operation of compressor and method therefore
KR100588719B1 (en) * 2004-08-30 2006-06-12 엘지전자 주식회사 Controlling apparatus of linear compressor and its method
KR100690664B1 (en) * 2005-05-06 2007-03-09 엘지전자 주식회사 Driving control method for reciprocating compressor
WO2022105738A1 (en) * 2020-11-19 2022-05-27 海尔智家股份有限公司 Variable capacity drive circuit for linear compressor in refrigerating electrical appliance

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