KR970014460A - Static power control device and method of induction heating equipment - Google Patents

Static power control device and method of induction heating equipment Download PDF

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Publication number
KR970014460A
KR970014460A KR1019950024113A KR19950024113A KR970014460A KR 970014460 A KR970014460 A KR 970014460A KR 1019950024113 A KR1019950024113 A KR 1019950024113A KR 19950024113 A KR19950024113 A KR 19950024113A KR 970014460 A KR970014460 A KR 970014460A
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South Korea
Prior art keywords
voltage
power control
resonant capacitor
power
outputting
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KR1019950024113A
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Korean (ko)
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KR0162383B1 (en
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정윤철
박병욱
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구자홍
엘지전자 주식회사
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Priority to KR1019950024113A priority Critical patent/KR0162383B1/en
Publication of KR970014460A publication Critical patent/KR970014460A/en
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Publication of KR0162383B1 publication Critical patent/KR0162383B1/en

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/12—Cooking devices

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)
  • Induction Heating Cooking Devices (AREA)

Abstract

본 발명은 유도가열기기의 정전력 제어장치 및 방법에 관한 것으로, 종래에는 입력 교류전원으로 부터 부하에 공급되는 전류를 전류트랜스(C. T)를 사용함에 따라 원가가 상승하게 되고, 전류트랜스(C. T)를 통해 검출한 전류값과 기준값을 비교부를 통해 비교해야 함에 따라 비교부 부가에 따른 원가상승 및 기준값의 수가 한정 되어 있어 전력 제어수가 한정되는 등의 문제점이 있다. 따라서, 본 발명은 LC공진이 일어나는 공진콘덴서 전압값을 읽어서 실험에 의한 목표전압과 비교하여 공진콘덴서 전압이 목표전압이 도달할 수 있도록 정전력을 제어를 마이크로 프로세서가 수행하도록 함으로써 기준값과 비교부를 생략할 수 있어서, 원가를 절감할 수 있음은 물론 기준값의 한정에 의해 제한된 전력 제어단계를 세밀히 할 수 있으며, 공진콘덴서에 과전압이 걸리는 것도 검지할 수 있어서 공진콘덴서를 보호할 수 있도록 한다.The present invention relates to an apparatus and method for controlling an electrostatic power of an induction heating apparatus. In the related art, a cost is increased by using a current transformer (C. T) for a current supplied to a load from an input AC power source. C. As the current value and the reference value detected through T) must be compared through the comparator, there is a problem in that the number of cost increase and the reference value is limited due to the addition of the comparator, thereby limiting the number of power control. Accordingly, the present invention omits the reference value and the comparator by reading the resonance capacitor voltage value at which LC resonance occurs and comparing the target voltage by the experiment so that the microprocessor controls the constant power so that the resonance voltage reaches the target voltage. As a result, it is possible to reduce the cost and to fine-tune the power control step limited by the limit of the reference value, and to detect the overvoltage of the resonant capacitor to protect the resonant capacitor.

Description

유도가열기기의 정전력 제어장치 및 방법Static power control device and method of induction heating equipment

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 종래 유도가열기기의 정전력 제어장치 회로도,1 is a circuit diagram of a constant power controller of a conventional induction heating apparatus,

제2도는 본 발명 유도가열기기의 정전력 제어장치 회로도,2 is a circuit diagram of a constant power control device of the induction heating apparatus of the present invention,

제3도는 제2도에서. 공진콘덴서 전압 검지부의 상세회로도,3 is from FIG. Detailed circuit diagram of the resonant capacitor voltage detection unit,

제5도는 본 발명 유도가열기기의 정전력 제어방법에 대한 동작과정도.5 is an operation process diagram for a constant power control method of the induction heating apparatus of the present invention.

Claims (3)

입력되는 교류전원(AC)을 일정한 직류전압으로 변환하는 정류수단과, 용기내의 음식물을 가열하는 워킹코일과, 상기 워킹코일에 공진전압을 제공하는 인버터수단을 구비하고 있는 조리기에 있어서, 상기 입력 교류전원(AC)에서 부하측으로 공급되는 입력전압을 읽어 현 상태를 인식하는 입력전압 검지수단과, 가열초기에 설정되어 있는 적정 전압을 출력함과 아울러 목표 전력과 공진콘덴서에 의한 현재 전압을 대비하여 정전력을 유지할 수 있도록 전력 제어신호를 출력하는 마이크로 프로세서와, 상기 마이크로 프로세서의 전력 제어신호에 따라 전압 제어수단. 주파수 발생수단을 거쳐 변화된 주파수에 따라 인버터수단의 스위칭소자를 교번하여 LC공진이 일어나도록 하는 구동수단과. 상기 공진콘덴서에 걸리는 전압을 검지하여 마이크로 프로세서로 제공하는 공진콘덴서 전압 검지수단을 포함하여 구성 된 것을 특징으로 하는 유도가열기기의 정전력 제어장치.In the cooker provided with rectifying means for converting the AC power input AC into a constant DC voltage, a working coil for heating food in the container, and an inverter means for providing a resonance voltage to the working coil. Input voltage detection means for recognizing the current state by reading the input voltage supplied from the power source (AC) to the load side, and outputting the appropriate voltage set at the initial stage of heating, and comparing the target power with the current voltage by the resonant capacitor. A microprocessor for outputting a power control signal to maintain power, and voltage control means according to the power control signal of the microprocessor. Drive means for alternating switching elements of the inverter means according to the changed frequency through the frequency generating means to cause LC resonance to occur; And a resonant capacitor voltage detection means for detecting a voltage applied to the resonant capacitor and providing it to a microprocessor. 제 1항에 있어서, 공진콘덴서 전압 검지수단은 공진콘덴서에 걸리는 전압을 직렬 연결된 저항을 통해 분압하고 그 분압된 전압에 검출하는 전압 검출수단과, 상기 전압 검출수단을 통해 검출된 전압을 대하여 1차적으로 정류하는 제1정류수단과, 상기 제1정류수단을 통해 정류된 전압에 대하여 다시 2차적으로 정류하여 얻은 일정한 직류전압을 출력하는 제2 정류수단으로 구성된 것을 특징으로 하는 유도가열기기의 정전력 제어장치.The voltage detecting means of claim 1, wherein the resonant capacitor voltage detecting means divides a voltage applied to the resonant capacitor through a resistor connected in series and detects the divided voltage at a voltage divided by the voltage detecting means. And a second rectifying means for outputting a constant DC voltage obtained by rectifying the secondary again with respect to the voltage rectified through the first rectifying means. Control unit. 부하에 공급되는 입력전압을 검지한 후 가장 낮은 상태의 전력 제어 신호를 출력하는 단계와, 상기 단계에서 전력 제어신호를 출력하면서 공진콘덴서 전압을 인식하는 단계와, 상기 단계에서 인식한 공진콘덴서 전압과 목표 전압을 비교하는 단계와, 상기 단계에서 비교결과 공진콘덴서 전압이 목표전압에 도달하지 못하면 다시 상태를 하나 상승시킨 전력 제어 신호를 출력하고 도달하면 그 상태를 유지하면서 전력 제어신호를 출력하여 정전력을 유지하도록 하는 단계로 이루어 진 것을 특징으로 하는 유도가열기기의 정전력 제어방법.Detecting the input voltage supplied to the load and outputting the lowest power control signal, recognizing the resonant capacitor voltage while outputting the power control signal in the step, and resonant capacitor voltage recognized in the step Comparing the target voltage, and if the resonance capacitor voltage does not reach the target voltage in the above step, outputs a power control signal that raises the state one by one. Constant power control method for an induction heating device, characterized in that consisting of steps to maintain. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950024113A 1995-08-04 1995-08-04 Electrostatic force control device and method for induction heating cooker KR0162383B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950024113A KR0162383B1 (en) 1995-08-04 1995-08-04 Electrostatic force control device and method for induction heating cooker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950024113A KR0162383B1 (en) 1995-08-04 1995-08-04 Electrostatic force control device and method for induction heating cooker

Publications (2)

Publication Number Publication Date
KR970014460A true KR970014460A (en) 1997-03-29
KR0162383B1 KR0162383B1 (en) 1999-01-15

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KR1019950024113A KR0162383B1 (en) 1995-08-04 1995-08-04 Electrostatic force control device and method for induction heating cooker

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