KR20110000304U - Control system for constant current - Google Patents

Control system for constant current Download PDF

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Publication number
KR20110000304U
KR20110000304U KR2020090008661U KR20090008661U KR20110000304U KR 20110000304 U KR20110000304 U KR 20110000304U KR 2020090008661 U KR2020090008661 U KR 2020090008661U KR 20090008661 U KR20090008661 U KR 20090008661U KR 20110000304 U KR20110000304 U KR 20110000304U
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South Korea
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current
switching element
voltage
constant
value
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KR2020090008661U
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Korean (ko)
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오호석
윤성준
김유태
한용만
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오호석
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Priority to KR2020090008661U priority Critical patent/KR20110000304U/en
Publication of KR20110000304U publication Critical patent/KR20110000304U/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0064—Magnetic structures combining different functions, e.g. storage, filtering or transformation

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Prevention Of Electric Corrosion (AREA)
  • Control Of Voltage And Current In General (AREA)

Abstract

본 고안은 전기를 이용하여 금속시설물의 부식을 방지하는 부식방지장치에 관한 것으로 특히 금속의 종류나 전해질의 종류에 무관하게 고른 전류분포를 얻을 수 있는 정전류제어장치에 관한 것으로.The present invention relates to a corrosion prevention device that prevents corrosion of metal facilities by using electricity, and more particularly, to a constant current control device that can obtain an even current distribution regardless of the type of metal or the type of electrolyte.

스위칭소자(10) 양단에 걸리는 전압을 충전하여 정전압회로를 구성하는 전원부(20),A power supply unit 20 configured to charge a voltage across the switching element 10 to form a constant voltage circuit,

출력전류의 평균치를 제어하는 스위칭소자(10),Switching element 10 for controlling the average value of the output current,

전류제한 설정값의 신호와 필터(30)부에서 오는 피드백된 실제전류치를 비교하여 스위칭소자(10)에 제어값을 보내는 오차증폭기(40), An error amplifier 40 for sending a control value to the switching element 10 by comparing the signal of the current limit setting value with the actual current value fed back from the filter 30;

전류센서인 분로(shunt)(50),Shunt 50, which is a current sensor,

분로(50)에서 들어온 펄스 구형파 전압을 적분하여 아나로그양의 RMS전압으로 바꾸어 피드백신호를 오차증폭기(40)에 넣어주는 차동연산증폭기로 구성된 필터(30)부로 구성되어 방식전류로 동작하는 정전류제어장치이다.Constant current control that operates with anticorrosive current by integrating the pulse square wave voltage coming from the shunt 50 and converting it into an analog amount of RMS voltage and putting a feedback signal into the error amplifier 40. Device.

정전류제어장치, 방식, 부식 Constant current controller, corrosion prevention, corrosion

Description

방식전류로 동작하는 정전류제어장치{ Control system for constant current }Constant current control device operating with anticorrosive current {Control system for constant current}

본 고안은 전기를 이용하여 금속시설물의 부식을 방지하는 부식방지장치에 관한 것으로 특히 금속의 종류나 전해질의 종류에 무관하게 고른 전류분포를 얻을 수 있는 정전류제어장치에 관한 것이다.The present invention relates to a corrosion preventing device that prevents corrosion of metal facilities by using electricity, and more particularly, to a constant current control device that can obtain an even current distribution regardless of the type of metal or the type of electrolyte.

금속은 전해질 속에서 전자를 잃고 이온상태가 되면 전해질에 용출되어 부식하기 때문에 금속에 전류를 공급하여 이온화되는 것을 방지하면 방식이 이루어진다.When the metal loses electrons in the electrolyte and becomes ionic, the metal elutes and corrodes in the electrolyte. Therefore, the metal is prevented from being ionized by supplying current to the metal.

이때 전자를 일정하게 공급하기 위하여 직류를 공급하는 정류기가 사용되는데 한 정류기에서 여러 곳의 금속에 전류를 공급할 때 일정이상의 전류가 흐르지 않게하기위하여 도선에 저항을 사용하여 전류를 제한하는 정전압방식을 사용한다. 이러한 저항을 이용한 정전압방식은 금속의 종류나 전해질의 종류에 따라 전류가 달라지므로 고른 전류분포를 얻기가 어렵다. 따라서 공급된 전류가 높은 곳의 금속은 과방식이 되고, 공급된 전류가 낮은 곳의 금속은 방식효과가 떨어진다. 또 전력이 저항에서 열발생으로 소비되므로 전력비용이 많이든다.At this time, rectifier supplying direct current is used to supply electrons constantly. In order to prevent current from flowing more than a certain amount when supplying current to several metals in one rectifier, a constant voltage method is used to limit the current by using a resistor in the conductor. do. In the constant voltage method using such a resistor, it is difficult to obtain an even current distribution because the current varies depending on the type of metal or the type of electrolyte. Therefore, the metal where the supplied current is high is over corrosion, and the metal where the supplied current is low is inferior to the anticorrosive effect. In addition, power is consumed as heat is generated from the resistor, which leads to high power costs.

이러한 저항을 이용한 정전압방식의 불안정한 전류분포를 개선하기 위하여 정전류제어장치를 사용하는 정전류방식이 있다. 기존의 정전류제어장치는 별도의 외부전원이 공급되어야 하므로 기존의 저항을 이용한 방식설비를 교체하고 싶어도 전원공급을위한 선로를 다시 만들어야하므로 비용이 많이 든다.There is a constant current method using a constant current control device to improve the unstable current distribution of the constant voltage method using such a resistor. Existing constant current controller has to be supplied with a separate external power source, so it is expensive to make a line for power supply even if it wants to replace the existing anticorrosive equipment.

별도의 외부전원을 사용하지 않고도 정전류제어가 가능하여야 한다.Constant current control should be possible without using external power.

방식전류를 이용하여 정전류제어장치를 동작시킨다.Constant current control device is operated by using anticorrosive current.

부가적인 전원이 없이 정전류제어장치를 동작시킬 수 있으므로 방식설비 교체시 비용이 적게든다.The constant current controller can be operated without additional power supply, thus reducing the cost of replacing anticorrosive equipment.

도 1을 참조하면 본 고안에 따른 방식전류를 이용하는 정전류제어장치는Referring to Figure 1 the constant current control device using the anticorrosive current according to the present invention

스위칭소자(10) 양단에 걸리는 전압을 충전하여 정전압회로를 구성하는 전원부(20),A power supply unit 20 configured to charge a voltage across the switching element 10 to form a constant voltage circuit,

출력전류의 평균치를 제어하는 스위칭소자(10),Switching element 10 for controlling the average value of the output current,

전류제한 설정값의 신호와 필터(30)부에서 오는 피드백된 실제전류치를 비교하여 스위칭소자(10)에 제어값을 보내는 오차증폭기(40), An error amplifier 40 for sending a control value to the switching element 10 by comparing the signal of the current limit setting value with the actual current value fed back from the filter 30;

전류센서인 분로(shunt)(50),Shunt 50, which is a current sensor,

분로(50)에서 들어온 펄스 구형파 전압을 적분하여 아나로그양의 RMS전압으로 바꾸어 피드백신호를 오차증폭기(40)에 넣어주는 차동연산증폭기로 구성된 필터(30)부,,A filter (30) comprising a differential operation amplifier for integrating a pulse square wave voltage input from the shunt 50 and converting it into an RMS amount of an analog amount and putting a feedback signal into the error amplifier 40;

전류를설정하는 가변저항(60)으로 구성된다.It consists of a variable resistor 60 for setting the current.

전원부(20)는 방식전류를 받아 각 구성부에 전원을 공급한다.The power supply unit 20 receives the anticorrosive current and supplies power to each component.

필터(30)부는 전류센서에서 들어온 펄스 구형파 전압을 적분하여 아나로그양의 RMS전압으로 바꾸어 피드백신호를 오차증폭기(40)에 넣어준다.The filter 30 integrates the pulse square wave voltage input from the current sensor and converts the pulse square wave voltage into an analog amount of RMS voltage, thereby inserting a feedback signal into the error amplifier 40.

오차증폭기(40)는 가변저항(60)의 신호와 필터(30)부에서 오는 피드백된 실제전류치를 비교하여 스위칭소자(10)에 제어값을 보낸다. The error amplifier 40 compares the signal of the variable resistor 60 with the actual current value fed back from the filter 30 and sends a control value to the switching element 10.

스위칭소자(10)는 출력전류의 평균치를 제어하여 부가적인 전원이 없이 방식전류로 정전류회로를 구성한다.The switching element 10 controls the average value of the output current to form a constant current circuit with an anticorrosive current without additional power.

도 1은 본 고안에 따른 방식전류로 동작 되는 정전류제어장치의 설명도이다1 is an explanatory diagram of a constant current control device operated with an anticorrosive current according to the present invention.

Claims (1)

스위칭소자(10) 양단에 걸리는 전압을 충전하여 정전압회로를 구성하는 전원부(20),A power supply unit 20 configured to charge a voltage across the switching element 10 to form a constant voltage circuit, 출력전류의 평균치를 제어하는 스위칭소자(10),Switching element 10 for controlling the average value of the output current, 전류제한 설정값의 신호와 필터(30)부에서 오는 피드백된 실제전류치를 비교하여 스위칭소자(10)에 제어값을 보내는 오차증폭기(40), An error amplifier 40 for sending a control value to the switching element 10 by comparing the signal of the current limit setting value with the actual current value fed back from the filter 30; 전류센서인 분로(shunt)(50),Shunt 50, which is a current sensor, 분로(50)에서 들어온 펄스 구형파 전압을 적분하여 아나로그양의 RMS전압으로 바꾸어 피드백신호를 오차증폭기(40)에 넣어주는 차동연산증폭기로 구성된 필터(30)부로 구성된 정전류제어장치A constant current control device comprising a filter 30 section consisting of a differential operation amplifier for integrating a pulse square wave voltage from the shunt 50 and converting it into an analog amount of RMS voltage to put a feedback signal into the error amplifier 40.
KR2020090008661U 2009-07-04 2009-07-04 Control system for constant current KR20110000304U (en)

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