KR101442976B1 - Apparatus for power saving in melting furnace/heat treating furnace - Google Patents

Apparatus for power saving in melting furnace/heat treating furnace Download PDF

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KR101442976B1
KR101442976B1 KR1020130056693A KR20130056693A KR101442976B1 KR 101442976 B1 KR101442976 B1 KR 101442976B1 KR 1020130056693 A KR1020130056693 A KR 1020130056693A KR 20130056693 A KR20130056693 A KR 20130056693A KR 101442976 B1 KR101442976 B1 KR 101442976B1
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South Korea
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heat treatment
furnace
melting furnace
treatment furnace
voltage
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KR1020130056693A
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Korean (ko)
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이근홍
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이근홍
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/005—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting using a power saving mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/08—Details peculiar to crucible or pot furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/08—Details peculiar to crucible or pot furnaces
    • F27B14/20—Arrangement of controlling, monitoring, alarm or like devices
    • 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
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
    • H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
    • H02M5/10—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers
    • H02M5/12—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers for conversion of voltage or current amplitude only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P13/00—Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output
    • H02P13/06—Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output by tap-changing; by rearranging interconnections of windings
    • 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
    • H02M1/0032—Control circuits allowing low power mode operation, e.g. in standby mode
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Furnace Details (AREA)

Abstract

The present invention relates to a power saving apparatus of a melting furnace/heat treatment furnace, which includes the melting furnace/heat treatment furnace; and a power control module for converting output current into DC voltage according to sensing of the temperature of the melting furnace/heat treatment furnace and performing a switching operation to supply power corresponding to a converted DC voltage value to the melting furnace/heat treatment furnace, wherein the power control module includes a power supply part for supplying alternating current voltage to the melting furnace/heat treatment furnace; a temperature sensing part for sensing and outputting the internal temperature changed according to driving of the melting furnace/heat treatment furnace; a controller for converting output current, in accordance with the sensing of the temperature of the melting furnace/heat treatment furnace inputted from the temperature sensing part, into DC voltage and generating and outputting a switching control signal for supplying power corresponding to the converted DC voltage value to the melting furnace/heat treatment furnace; and a relay part for switching one among a plurality of taps installed on an output side based on the switching control signal inputted from the controller and supplying voltage, which is set in the switched tap, to the melting furnace/heat treatment furnace. Therefore, the present invention can supply power to the melting furnace/heat treatment furnace while minimizing a power loss, thereby reducing electricity charges.

Description

용해로／열처리로의 전력절감장치{Apparatus for power saving in melting furnace/heat treating furnace}BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a power saving device for a heating furnace,

본 발명은 용해로/열처리로의 전력 손실을 줄여 전기요금을 감소할 수 있도록 하는 용해로/열처리로의 전력절감장치에 관한 것이다.The present invention relates to a power saving device for a melting furnace / heat treatment furnace capable of reducing electric power loss in a melting furnace / heat treatment furnace to reduce electric charges.

최근 들어 유전가열을 지칭하는 히터 발열 산업분야가 눈부시게 발전하고 있으며, 용해로, 열처리로 등이 여기에 해당된다.In recent years, there has been a remarkable development in the field of heater heating industry, which refers to dielectric heating, and this includes melting furnaces and heat treatment furnaces.

전력제어장치는 히터의 동작을 제어하여 외부에서 공급되는 상용교류전원을 부하측에 안전하고 정확하게 공급하기 위한 장비로서, 입력전압이 변동되는 것을 자동으로 감지하고 부하 설비에 유해한 각종 장애요소를 제거하여 균등하고 안정된 전원을 공급하도록 한다.The power control device controls the operation of the heater and supplies the commercial AC power supplied from the outside to the load side safely and accurately. It automatically detects the fluctuation of the input voltage and removes various obstacles harmful to the load facility, And supply stable power.

이러한 전력제어장치로는 현재 여러 가지가 사용되고 있지만, 그 중에서 가장 대표적으로 실리콘제어정류기(SCR, Silicon Controlled Rectifier)를 이용한 전력제어장치가 있다.Various power control devices are currently used, but among them, there is a power control device using a silicon controlled rectifier (SCR).

SCR을 이용한 전력제어장치는 위상제어를 이용한 방식으로서, 게이트 단자에 가해지는 신호 전압에 따라 스위칭 다이오드가 개폐되어 부하측으로 공급되는 전류 및 전압의 흐름을 조절할 수 있다.The power control device using SCR is a method using phase control, in which the switching diode is opened or closed according to the signal voltage applied to the gate terminal, so that the flow of current and voltage supplied to the load side can be controlled.

이처럼 종래의 전력제어장치로 사용되는 SCR을 이용한 위상제어방식은 전압 및 전류를 일정하게 제어하는데 효과적이고, 히터와 같이 유도성 부하에 사용할 수 있다.As described above, the phase control method using the SCR used in the conventional power control apparatus is effective for constantly controlling the voltage and the current, and can be used for an inductive load such as a heater.

하지만, SCR을 이용한 위상제어방식은 턴 온시에 고조파가 발생하여 주변 전자기기에 오동작을 발생시킬 수 있었으며, 턴 오프시에 부하에 전력이 공급되지 않고 무효전력이 되어 전력이용도가 낮아지고 이에 따라 전력효율이 저하되는 문제점이 있었다.However, the phase control method using SCR can generate malfunctions in peripheral electronic devices due to the occurrence of harmonics at the time of turn-on, and the power utilization is lowered due to the reactive power without supplying power to the load at the time of turn- There is a problem that power efficiency is lowered.

대한민국 공개특허공보 제10-2003-0044607호 2003. 6. 9.Korean Patent Laid-Open No. 10-2003-0044607 September 6, 2003 대한민국 등록실용신안공보 제20-0390040호 2005. 7. 18.Registered Utility Model No. 20-0390040 of Korea Registered Jul. 18, 2005

본 발명은, 용해로, 열처리로 등과 같은 부하의 전력 손실을 줄여 전기요금을 감소할 수 있도록 하는 용해로/열처리로의 전력절감장치를 제공한다.The present invention provides a power saving device for a melting furnace / heat treatment furnace which can reduce electric power loss such as a melting furnace, a heat treatment furnace and the like to reduce electric charges.

본 발명은, 용해로/열처리로의 온도감지에 따른 출력전류를 DC 전압으로 변환하고, 이를 토대로 용해로/열처리로에 공급되는 전력을 스위칭하여 용해로/열처리로에 필요한 만큼의 전력을 공급하도록 하는 용해로/열처리로의 전력절감장치를 제공한다.The present invention relates to a method and apparatus for converting an output current according to temperature sensing of a melting furnace / heat treatment furnace to a DC voltage and switching the power supplied to the furnace / heat treatment furnace to supply power as needed for the melting furnace / A power saving device for a heat treatment furnace is provided.

본 발명의 일 실시예에 따른 용해로/열처리로의 전력절감장치는, 용해로/열처리로, 그리고 용해로/열처리로의 온도감지에 따른 출력전류를 DC 전압으로 변환하고, 변환된 DC 전압값에 대응하는 전력을 용해로/열처리로로 공급하도록 스위칭하는 전력제어모듈을 포함하며, 전력제어모듈은, 교류전압을 용해로/열처리로로 공급하는 전원공급부와, 용해로/열처리로의 구동에 따라 변화하는 내부의 온도를 감지하여 출력하는 온도감지부와, 온도감지부로부터 입력되는 용해로/열처리로의 온도감지에 따른 출력전류를 DC 전압으로 변환하며, 변환된 DC 전압값에 대응하는 전력을 용해로/열처리로로 공급하기 위한 스위칭 제어신호를 생성하여 출력하는 제어부, 그리고 제어부로부터 입력되는 스위칭 제어신호를 토대로 출력측에 구비된 복수의 탭 중 하나의 탭을 스위칭하여, 스위칭된 탭에 설정되어 있는 전압을 용해로/열처리로로 공급하도록 하는 릴레이부를 포함할 수 있다.The power saving device of the melting furnace / heat treatment furnace according to an embodiment of the present invention is a device for converting an output current due to temperature sensing of a melting furnace / heat treatment furnace and a melting furnace / heat treating furnace to a DC voltage, And a power control module for switching the power to be supplied to the melting furnace / heat treatment furnace, wherein the power control module includes: a power supply part for supplying the alternating voltage to the melting furnace / heat treating furnace; And a controller for converting an output current according to temperature sensing of the melting furnace / heat treatment furnace input from the temperature sensing unit into a DC voltage and supplying power corresponding to the converted DC voltage to the melting furnace / heat treatment furnace And a control unit for generating a switching control signal for outputting a switching control signal for switching the one of the plurality of taps provided on the output side based on the switching control signal input from the control unit To the switching, it is possible to include a relay for supplying a voltage which is set to a switching tab, to the furnace / heat treatment.

이때 릴레이부는, 전원공급부로부터 입력되는 교류전압을 권선비에 따라 2차코일로 유도하는 1차코일과, 1차코일로부터 유도된 전압을 용해로/열처리로로 출력하되, 복수의 탭이 출력단에 구비되어 권선수 차이에 따라 서로 다른 전압을 용해로/열처리로로 공급하는 2차코일, 그리고 2차코일의 출력단에 구비되는 각 탭마다 설치되어 있으며, 제어부로부터 입력되는 스위칭 제어신호에 따라 2차코일의 출력단에 구비된 복수의 탭 중 하나의 탭을 스위칭하여, 스위칭된 탭에 설정되어 있는 권선비에 따른 전압을 용해로/열처리로로 공급하는 스위치를 포함하여 구성하는 것이 바람직하다.The relay unit includes a primary coil that induces an AC voltage input from a power supply unit to a secondary coil according to a winding ratio, and a voltage output unit that outputs a voltage derived from the primary coil to the melting furnace / heat treatment furnace, A secondary coil which supplies different voltages to the melting furnace / heat treatment furnace in accordance with the difference of the winding currents, and each of the taps provided at the output terminal of the secondary coils. In accordance with the switching control signal inputted from the control unit, And a switch for switching one of the plurality of taps included in the switching tap and supplying a voltage corresponding to the turn ratio set to the switched tap to the melting furnace / heat treatment furnace.

또한, 스위치는 하나 이상 복수 개로 구성되며, 제어부는 스위치의 수량에 따라 온도감지부로부터 입력되는 전류를 변환하는 DC 전압값의 범위를 변경하여 설정할 수 있도록 구성하는 것이 바람직하다.It is preferable that the control unit is configured to be able to change the range of the DC voltage value for converting the current input from the temperature sensing unit according to the number of the switches and to set the range.

또한, 제어부는, 온도감지부로부터 입력되는 온도감지에 따른 출력전류가 변화하여 릴레이부의 스위칭 제어를 변경할 경우, 사전에 설정된 딜레이 시간을 적용시킨 후, 변경된 스위칭 제어신호를 릴레이부로 출력하는 인터록(interlock) 기능을 더 수행하도록 구성하는 것이 바람직하다.In addition, when the output current according to the temperature sensing input from the temperature sensing unit changes and the switching control of the relay unit is changed, the control unit applies the predetermined delay time, and then outputs the changed switching control signal to the relay unit ) Function is further performed.

이상에서와 같이 본 발명의 용해로/열처리로의 전력절감장치에 따르면, 용해로/열처리로의 온도감지에 따른 출력전류를 DC 전압으로 변환하고, 변환된 DC 전압값을 토대로 복수 개로 나누어진 전력을 용해로/열처리로에 공급하도록 스위칭하기 때문에 용해로/열처리로에 별다른 전력손실 없이 필요한 만큼의 전력이 공급되어 용해로/열처리로의 전력 사용효율을 최적화할 수 있으며, 이에 따라 전기요금을 크게 절감시킬 수 있는 효과가 있다.As described above, according to the power saving device of the melting furnace / heat treatment furnace of the present invention, the output current according to the temperature sensing of the melting furnace / heat treatment furnace is converted into the DC voltage, / Heat treatment furnace, it is possible to optimize the power utilization efficiency of the melting furnace / heat treatment furnace by supplying as much power as necessary without any power loss to the melting furnace / heat treatment furnace, .

도 1은 본 발명의 일 실시예에 따른 용해로/열처리로의 전력절감장치의 구성을 개략적으로 나타낸 도면,
도 2는 도 1의 릴레이부의 구성을 보다 상세하게 나타낸 도면,
도 3은 본 발명의 일 실시예에 따른 용해로/열처리로의 전력절감장치의 동작과정을 상세하게 설명하기 위한 순서도이다.BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing a configuration of a power saving device of a melting furnace / heat treatment furnace according to an embodiment of the present invention;
FIG. 2 is a detailed view of the configuration of the relay unit of FIG. 1,
FIG. 3 is a flowchart illustrating an operation of a power saving device of a furnace / heat treatment furnace according to an exemplary embodiment of the present invention. Referring to FIG.

이하, 첨부된 도면을 참조하여 본 발명의 용해로/열처리로의 전력절감장치를 상세하게 설명한다.DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a power saving device of a melting furnace / heat treatment furnace of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명의 일 실시예에 따른 용해로/열처리로의 전력절감장치의 구성을 개략적으로 나타낸 도면이며, 도 2는 도 1의 릴레이부의 구성을 보다 상세하게 나타낸 도면이다.FIG. 1 is a view schematically showing a configuration of a power saving device for a melting furnace / heat treatment furnace according to an embodiment of the present invention, and FIG. 2 is a diagram showing the configuration of a relay part of FIG. 1 in more detail.

도시된 바와 같이 본 발명의 전력절감장치는, 용해로/열처리로(100)와 전력제어모듈(200)로 구성되며, 전력제어모듈(200)은 전원공급부(210), 온도감지부(220), 제어부(230), 릴레이부(240) 등으로 구성된다.The power control module 200 includes a power supply unit 210, a temperature sensing unit 220, and a power supply control unit 200. The power supply control unit 200 includes a power supply unit 210, A control unit 230, a relay unit 240, and the like.

전력제어모듈(200)은 용해로/열처리로(100)의 온도감지에 따른 출력전류를 DC 전압으로 변환하고, 변환된 DC 전압값에 대응하는 전력을 용해로/열처리로(100)로 공급하도록 스위칭한다.The power control module 200 switches the output current according to the temperature sensing of the melting furnace / heat treatment furnace 100 to a DC voltage and switches the power corresponding to the converted DC voltage value to be supplied to the melting furnace / heat treatment furnace 100 .

전원공급부(210)는 외부로부터 공급되는 상용교류전압을 릴레이부(240)를 통해 용해로/열처리로(100)로 공급한다.The power supply unit 210 supplies the commercial AC voltage supplied from the outside to the melting furnace / heat treatment furnace 100 through the relay unit 240.

온도감지부(220)는 용해로/열처리로(100)의 구동에 따라 변화하는 내부의 온도를 감지하고, 감지된 출력전류를 제어부(230)로 출력한다.The temperature sensing unit 220 senses an internal temperature that changes according to the driving of the melting furnace / heat treatment furnace 100 and outputs the sensed output current to the controller 230.

제어부(230)는 온도감지부(220)로부터 입력되는 용해로/열처리로(100)의 온도감지에 따른 출력전류(대략, 4~20mA의 범위)를 DC 전압으로 변환하는 모듈이 포함되어 있으며, 이 모듈을 토대로 변환된 DC 전압값에 대응하는 전력을 용해로/열처리로(100)로 공급하기 위한 스위칭 제어신호를 생성(사전에 설정되어 있는 테이블(표 1 참조)을 토대로 생성함)하여 릴레이부(240)로 출력한다.The control unit 230 includes a module for converting an output current (a range of approximately 4 to 20 mA) according to temperature sensing of the melting furnace / heat treatment furnace 100 inputted from the temperature sensing unit 220 to a DC voltage. (Generated based on a preset table (see Table 1)) for supplying the power corresponding to the DC voltage value converted based on the module to the melting furnace / heat treatment furnace 100, 240).

릴레이부(240)는 제어부(230)로부터 입력되는 스위칭 제어신호를 토대로 출력측에 구비된 복수의 탭 중 하나의 탭을 스위칭하여, 스위칭된 탭에 설정되어 있는 전압을 용해로/열처리로(100)로 공급한다.The relay unit 240 switches one of the plurality of taps provided on the output side based on the switching control signal input from the controller 230 and supplies the voltage set in the switched taps to the melting furnace / Supply.

이때 릴레이부(240)는, 전원공급부(210)로부터 입력되는 교류전압을 권선비에 따라 2차코일(244)로 유도하는 1차코일(242)과, 1차코일(242)로부터 유도된 전압을 용해로/열처리로(100)로 출력하되, 복수의 탭이 출력단에 구비되어 권선수 차이에 따라 서로 다른 전압을 용해로/열처리로(100)로 공급하는 2차코일(244)과, 2차코일(244)의 출력단에 구비되는 각 탭마다 설치되어 있으며, 제어부(230)로부터 입력되는 스위칭 제어신호에 따라 2차코일(244)의 출력단에 구비된 복수의 탭 중 하나의 탭을 스위칭하여, 스위칭된 탭에 설정되어 있는 권선비에 따른 전압을 용해로/열처리로(100)로 공급하는 스위치(246)로 구성된다.The relay unit 240 includes a primary coil 242 that induces the AC voltage input from the power supply unit 210 to the secondary coil 244 according to the winding ratio, A secondary coil 244 for outputting the voltage to the melting furnace / heat treatment furnace 100 and supplying a different voltage to the melting furnace / heat treatment furnace 100 in accordance with the difference between the windings of the plurality of taps, 242, and 244, and switches one of the plurality of taps provided at the output terminal of the secondary coil 244 according to the switching control signal input from the controller 230, And a switch 246 for supplying a voltage according to the winding ratio set in the tap to the melting furnace / heat treatment furnace 100.

또한, 스위치(246)는 하나 이상 복수 개로 구성되며, 이때 제어부(230)는 스위치(246)의 수량에 따라 온도감지부(220)로부터 입력되는 전류를 변환하는 DC 전압값의 범위를 변경하여 설정할 수 있다.The control unit 230 changes the range of the DC voltage value converted from the current input from the temperature sensing unit 220 according to the number of the switches 246, .

즉 본 발명의 실시예에서는 2차코일(244)의 출력단에 구비되는 탭을 5개로 구성하였지만 이에 한정되는 것은 아니며, 그 이외에 사용환경에 따라 다양하게 변경할 수 있음은 물론이다.That is, in the embodiment of the present invention, the number of taps provided in the output terminal of the secondary coil 244 is five, but the present invention is not limited thereto.

이때 온도감지부(220)에서의 온도감지에 따른 출력전류를 DC 전압으로 변환하는 제어부(230)는, 릴레이부(240)의 2차코일(244) 출력단에 구비되는 각 탭의 수만큼 DC 전압범위를 사전에 설정할 수 있다.The control unit 230 converts an output current according to the temperature sensing in the temperature sensing unit 220 to a DC voltage. The control unit 230 converts the DC voltage to the DC voltage by the number of taps provided at the output terminal of the secondary coil 244 of the relay unit 240. [ The range can be preset.

예를 들어, 본 발명의 실시예에서는 표 1에서와 같이 온도감지부(220)로부터 입력되는 출력전류에 따라 0.8V~1.8V, 1.9V~2.8V, 2.9V~3.9V, 4.0V~4.5V, 4.6V~5V의 DC 전압값으로 범위로 설정하였으며, 향후 릴레이부(240)의 2차코일(244) 출력단에 구비되는 탭의 수가 변경된다면 DC 전압값의 범위 또한 그 수에 맞게 변경될 수 있다.For example, according to the embodiment of the present invention, as shown in Table 1, depending on the output current input from the temperature sensing unit 220, a voltage of 0.8V to 1.8V, 1.9V to 2.8V, 2.9V to 3.9V, 4.0V to 4.5 V and a DC voltage value of 4.6 V to 5 V. If the number of taps provided at the output terminal of the secondary coil 244 of the relay unit 240 is changed in the future, the range of the DC voltage value is also changed according to the number .

온도감지부에서의 출력전류Output current in temperature sensing section DC 전압값 변환범위DC voltage value conversion range

4~20mA

4 ~ 20mA

0.8V~1.8V0.8V to 1.8V 1.9V~2.8V1.9V to 2.8V 2.9V~3.9V2.9V to 3.9V 4.0V~4.5V4.0V to 4.5V 4.6V~5V4.6V to 5V

또한, 제어부(230)는 온도감지부(220)로부터 입력되는 온도감지에 따른 출력전류가 변화하여 릴레이부(240)의 스위칭 제어를 변경할 경우, 즉 릴레이부(240)의 2차코일(244) 출력단에 구비된 스위치(246)를 변경 조작할 경우, 사전에 설정된 딜레이 시간을 적용시킨 후, 변경된 스위칭 제어신호를 릴레이부(240)로 출력하는 인터록 기능을 더 수행할 수 있다.The control unit 230 controls the switching of the relay unit 240 such that the output current of the secondary coil 244 of the relay unit 240 changes, When the switch 246 provided at the output terminal is changed, an interlock function for outputting the changed switching control signal to the relay unit 240 after applying the preset delay time can be further performed.

다음에는, 이와 같이 구성된 본 발명에 따른 용해로/열처리로의 전력절감장치의 동작과정을 도 3을 참조하여 상세하게 설명한다.Hereinafter, the operation of the power saving apparatus of the melting furnace / heat treatment furnace according to the present invention will be described in detail with reference to FIG.

도 3은 본 발명의 일 실시예에 따른 용해로/열처리로의 전력절감장치의 동작과정을 상세하게 설명하기 위한 순서도이다.FIG. 3 is a flowchart illustrating an operation of a power saving device of a furnace / heat treatment furnace according to an exemplary embodiment of the present invention. Referring to FIG.

우선, 전원공급부(210)에서 릴레이부(240)를 통해 용해로/열처리로(100)로 정상적으로 전력이 공급되는 상태에서, 온도감지부(220)는 용해로/열처리로(100)의 구동에 따라 변화하는 내부의 온도를 감지하고, 감지된 결과를 제어부(230)로 출력한다(S10).First, in a state where power is normally supplied from the power supply unit 210 through the relay unit 240 to the melting furnace / heat treatment furnace 100, the temperature sensing unit 220 detects the temperature of the furnace / And outputs the sensed result to the control unit 230 (S10).

제어부(230)는 온도감지부(220)로부터 용해로/열처리로(100)의 온도감지에 따른 출력전류가 입력되는지를 판단하고(S20), 판단결과 용해로/열처리로(100)의 온도감지에 따른 출력전류가 입력되면, 해당 출력전류를 DC 전압으로 변환한다(S30).The control unit 230 determines whether the output current according to the temperature sensing of the dissolution / heat treatment furnace 100 is input from the temperature sensing unit 220 in step S20. When the output current is input, the output current is converted into a DC voltage (S30).

S30 단계에서 온도감지부(220)로부터 전달받은 출력전류를 DC 전압으로 변환한 이후, 제어부(230)는 변환된 DC 전압값에 대응하는 전력을 용해로/열처리로(100)로 공급하기 위한 스위칭 제어신호를 생성하여 릴레이부(240)로 출력한다(S40). 즉 제어부(230)는 사전에 설정되어 있는 테이블(상술한 표 1)을 토대로 용해로/열처리로(100)의 현재 동작 상태에 적합한 전력을 공급하기 위한 스위칭 제어신호를 생성하여 릴레이부(240)로 출력하는 것이다.The control unit 230 converts the output current received from the temperature sensing unit 220 into a DC voltage in step S30 and then supplies the power corresponding to the converted DC voltage to the melting furnace / And outputs the signal to the relay unit 240 (S40). That is, the control unit 230 generates a switching control signal for supplying power suitable for the current operating state of the melting furnace / heat treatment furnace 100 based on a preset table (the above-described Table 1) and outputs the switching control signal to the relay unit 240 .

그러면, 릴레이부(240)는 제어부(230)로부터 입력되는 스위칭 제어신호를 토대로 2차코일(244)의 출력측에 구비된 복수의 탭 중 하나의 탭에 연결된 스위치(246)를 구동시키고(S50), 스위치(246) 구동에 따라 해당 탭에 설정되어 있는 전압이 용해로/열처리로(100)에 공급되도록 한다(S60). 즉 용해로/열처리로(100)의 현재 상태에 적합한 최적의 전력을 공급하도록 스위칭함과 동시에 별다른 전력손실이 발생하지 않도록 함으로써, 종래의 SCR을 이용한 위상제어방식에서의 문제점인 턴 오프시 부하에 전력이 공급되지 않아 발생하는 무효전력에 의한 전력효율 저하 및 비용증대의 문제를 해결할 수 있는 것이다.The relay unit 240 drives the switch 246 connected to one of the plurality of taps provided on the output side of the secondary coil 244 based on the switching control signal input from the controller 230 in operation S50, , And the voltage set on the corresponding tab is supplied to the melting furnace / heat treatment furnace 100 in accordance with the driving of the switch 246 (S60). That is, switching is performed so as to supply the optimum power suitable for the current state of the melting furnace / heat treatment furnace 100, and at the same time, power loss is not generated at the same time. As a result, in the phase control using the conventional SCR, It is possible to solve the problem of the reduction of the power efficiency and the increase of the cost due to the reactive power generated due to the ineffective power generated.

이후, 제어부(230)는 S10 단계 이후를 반복, 수행하여 용해로/열처리로(100)의 전력제어를 수행한다.Then, the control unit 230 repeats and executes step S10 to perform power control of the melting furnace / heat treatment furnace 100.

한편, 상술한 S40 단계를 통해 제어부(230)에서 온도감지부(220)로부터 전달받은 출력전류에 따라 변환한 DC 전압값에 대응하는 전력을 용해로/열처리로(100)로 공급하기 위한 스위칭 제어신호를 생성하여 릴레이부(240)로 출력할 때, 온도감지부(220)로부터 전달받은 출력전류가 변화하여 릴레이부(240)의 스위칭 제어를 변경할 필요가 있을 수 있다. 이 경우, 제어부(230)는 사전에 설정된 딜레이 시간을 적용시킨 후 변경된 스위칭 제어신호를 릴레이부(240)로 출력하는 인터록 기능을 수행함으로써, 스위칭 변경시 발생할 수 있는 선간 쇼트를 예방할 수 있도록 한다.In step S40, the control unit 230 generates a switching control signal for supplying power corresponding to the converted DC voltage value to the melting furnace / heat treatment furnace 100 according to the output current received from the temperature sensing unit 220, It may be necessary to change the switching control of the relay unit 240 by changing the output current received from the temperature sensing unit 220 when the output signal is generated and output to the relay unit 240. [ In this case, the control unit 230 performs an interlock function of applying a predetermined delay time and then outputting the changed switching control signal to the relay unit 240, thereby preventing a line-to-line shortage that may occur upon switching change.

또한, 제어부(230)는 관리자의 조작 신호를 확인하여, 릴레이부(240)의 스위치(246) 수량에 따라 온도감지부(220)로부터 입력되는 전류를 변환하는 DC 전압값의 범위를 변경하여 설정할 수 있다.The control unit 230 checks the operation signal of the manager and changes the range of the DC voltage value for converting the current input from the temperature sensing unit 220 according to the number of the switches 246 of the relay unit 240 .

이에 따라 본 발명은, 복수 단계의 스위칭 제어를 토대로 전력손실을 최소화하면서 용해로/열처리로에 전력을 공급하여 할 수 있으며, 이를 통해 현재 사용하는 전력량에 비해 대략 30% 정도의 절전이 가능하다.Accordingly, the present invention can supply power to the melting furnace / heat treatment furnace while minimizing power loss based on switching control of a plurality of stages, thereby saving about 30% of power consumption compared to the current amount of power.

여기에서, 상술한 본 발명에서는 바람직한 실시예를 참조하여 설명하였지만, 해당 기술분야의 숙련된 당업자는 하기의 특허청구범위에 기재된 본 발명의 사상 및 영역으로부터 벗어나지 않는 범위 내에서 본 발명을 다양하게 수정 및 변경할 수 있음을 이해할 수 있을 것이다.It will be apparent to those skilled in the art that various modifications may be made to the invention without departing from the spirit and scope of the invention as defined in the following claims And changes may be made without departing from the spirit and scope of the invention.

100 : 용해로/열처리로 200 : 전력제어모듈
210 : 전원공급부 220 : 온도감지부
230 : 제어부 240 : 릴레이부
242 : 1차코일 244 : 2차코일
246 : 스위치100: Melting furnace / heat treatment furnace 200: Power control module
210: Power supply unit 220: Temperature sensing unit
230: control unit 240: relay unit
242: Primary coil 244: Secondary coil
246: Switch

Claims (4)

용해로/열처리로, 그리고
상기 용해로/열처리로의 온도감지에 따른 출력전류를 DC 전압으로 변환하고, 변환된 DC 전압값에 대응하는 전력을 상기 용해로/열처리로로 공급하도록 스위칭하는 전력제어모듈을 포함하며,
상기 전력제어모듈은,
교류전압을 용해로/열처리로로 공급하는 전원공급부,
상기 용해로/열처리로의 구동에 따라 변화하는 내부의 온도를 감지하여 출력하는 온도감지부,
상기 온도감지부로부터 입력되는 상기 용해로/열처리로의 온도감지에 따른 출력전류를 DC 전압으로 변환하며, 변환된 DC 전압값에 대응하는 전력을 상기 용해로/열처리로로 공급하기 위한 스위칭 제어신호를 생성하여 출력하는 제어부, 그리고
상기 제어부로부터 입력되는 스위칭 제어신호를 토대로 출력측에 구비된 복수의 탭 중 하나의 탭을 스위칭하여, 스위칭된 상기 탭에 설정되어 있는 전압을 용해로/열처리로로 공급하도록 하는 릴레이부를 포함하되,
상기 제어부는 상기 온도감지부로부터 입력되는 온도감지에 따른 출력전류가 변화하여 상기 릴레이부의 스위칭 제어를 변경할 경우, 사전에 설정된 딜레이 시간을 적용시킨 후, 변경된 스위칭 제어신호를 상기 릴레이부로 출력하는 인터록(interlock) 기능을 수행하는 용해로/열처리로의 전력절감장치.Furnace / heat treatment furnace, and
And a power control module for converting the output current according to the temperature sensing of the melting furnace / heat treatment furnace to a DC voltage and for switching the power corresponding to the converted DC voltage value to be supplied to the melting furnace /
The power control module includes:
A power supply unit for supplying AC voltage to the melting furnace / heat treatment furnace,
A temperature sensing unit for sensing and outputting an internal temperature varying with driving of the melting furnace / heat treatment furnace,
Converts the output current according to temperature sensing of the melting furnace / heat treatment furnace input from the temperature sensing unit to a DC voltage, and generates a switching control signal for supplying power corresponding to the converted DC voltage value to the melting furnace / heat treatment furnace A control unit for outputting
And a relay unit for switching one of the plurality of taps provided on the output side based on the switching control signal input from the control unit and supplying the voltage set in the switched tap to the melting furnace /
Wherein the control unit applies a predetermined delay time when the output current according to the temperature sensing input from the temperature sensing unit changes and the switching control of the relay unit is changed and then outputs the changed switching control signal to the relay unit interlock) function in the melting furnace / heat treatment furnace. 제 1 항에 있어서,
상기 릴레이부는,
상기 전원공급부로부터 입력되는 교류전압을 권선비에 따라 2차코일로 유도하는 1차코일,
상기 1차코일로부터 유도된 전압을 상기 용해로/열처리로로 출력하되, 복수의 탭이 출력단에 구비되어 권선수 차이에 따라 서로 다른 전압을 상기 용해로/열처리로로 공급하는 2차코일, 그리고
상기 2차코일의 출력단에 구비되는 각 탭마다 설치되어 있으며, 상기 제어부로부터 입력되는 스위칭 제어신호에 따라 상기 2차코일의 출력단에 구비된 복수의 탭 중 하나의 탭을 스위칭하여, 스위칭된 상기 탭에 설정되어 있는 권선비에 따른 전압을 상기 용해로/열처리로로 공급하는 스위치
를 포함하는 용해로/열처리로의 전력절감장치.The method according to claim 1,
The relay unit includes:
A primary coil for inducing an AC voltage input from the power supply unit to a secondary coil according to a winding ratio,
A secondary coil for outputting a voltage derived from the primary coil to the melting furnace / heat treatment furnace, wherein a plurality of taps are provided at an output terminal to supply different voltages to the melting furnace /
A switch for switching one of a plurality of taps provided at an output terminal of the secondary coil in accordance with a switching control signal input from the control unit, To the melting furnace / heat treatment furnace,
And a power storage device for storing power of the heating furnace. 제 2 항에 있어서,
상기 스위치는 하나 이상 복수 개로 구성되며,
상기 제어부는 상기 스위치의 수량에 따라 상기 온도감지부로부터 입력되는 전류를 변환하는 DC 전압값의 범위를 변경하여 설정할 수 있는 용해로/열처리로의 전력절감장치.3. The method of claim 2,
The switch may comprise one or more switches,
Wherein the controller is capable of changing a range of a DC voltage value for converting a current input from the temperature sensing unit according to the number of the switches. 삭제delete
KR1020130056693A 2013-05-20 2013-05-20 Apparatus for power saving in melting furnace/heat treating furnace KR101442976B1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101813508B1 (en) 2016-08-05 2017-12-29 장인열처리(주) The system and method with heat treatment cost and energy savings possible combined heat treatment
KR20180058039A (en) * 2016-11-23 2018-05-31 주식회사 포스코 Method for supplying power of electric furnace
KR20200101634A (en) 2019-02-20 2020-08-28 주식회사 에코비젼21 Furnace power reduction system and power reduction method in casting manufacture
KR102236854B1 (en) 2019-10-10 2021-04-07 주식회사 포스코 Method for supplying power of electric furnace
KR102557370B1 (en) 2022-08-17 2023-07-19 주식회사 에코링크 Melting Furnace Power Control System

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101813508B1 (en) 2016-08-05 2017-12-29 장인열처리(주) The system and method with heat treatment cost and energy savings possible combined heat treatment
KR20180058039A (en) * 2016-11-23 2018-05-31 주식회사 포스코 Method for supplying power of electric furnace
KR101864842B1 (en) 2016-11-23 2018-06-05 주식회사 포스코 Method for supplying power of electric furnace
KR20200101634A (en) 2019-02-20 2020-08-28 주식회사 에코비젼21 Furnace power reduction system and power reduction method in casting manufacture
KR102236854B1 (en) 2019-10-10 2021-04-07 주식회사 포스코 Method for supplying power of electric furnace
KR102557370B1 (en) 2022-08-17 2023-07-19 주식회사 에코링크 Melting Furnace Power Control System

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