KR960043984A - Frequency conversion circuit of induction cooker - Google Patents

Frequency conversion circuit of induction cooker Download PDF

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Publication number
KR960043984A
KR960043984A KR1019950012781A KR19950012781A KR960043984A KR 960043984 A KR960043984 A KR 960043984A KR 1019950012781 A KR1019950012781 A KR 1019950012781A KR 19950012781 A KR19950012781 A KR 19950012781A KR 960043984 A KR960043984 A KR 960043984A
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KR
South Korea
Prior art keywords
frequency band
voltage
frequency
current
load
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Application number
KR1019950012781A
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Korean (ko)
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KR0152836B1 (en
Inventor
정윤철
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구자홍
Lg 전자 주식회사
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Priority to KR1019950012781A priority Critical patent/KR0152836B1/en
Publication of KR960043984A publication Critical patent/KR960043984A/en
Application granted granted Critical
Publication of KR0152836B1 publication Critical patent/KR0152836B1/en

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Classifications

    • 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
    • H05B6/04—Sources of current
    • 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)
  • Cookers (AREA)

Abstract

본 발명은 유도가열조리기의 주파수대역 변환회로에 관한 것으로, 종래에는 워킹코일 위에 강자성체인 용기가 탑재될 경우에는 리액턴스값(L)이 고정되고 이것과 공진콘덴서의 값에 따라 공진주파수가 형성되고 원하는 전력으로 파워를 공급하기 위해서 전류검출기에서 전류를 검출하여 그에 따른 주파수를 발생하도록 하였으나 상자성체인 용기가 탑재될 경우 리액턴스값이 강자성체인 용기의 리액턴스값보다 상당히 떨어짐으로써 전압조정을 하더라도 적당한 파워를 공급할 수 없는주파수대역이므로 그 주파수대역을 바꾸어줘야 하는 문제점이이 있었다. 따라서, 본 발명은 부하에 흐르는 전류의 양을검출하여 부하가 강자성체인지 상자성체인지를 판단한 후 마이크로 프로세서의 제어출력에 따라 콘덴서 값을 변환하여 주파수 대역을 바꾸어주도록 하여 용기의 종류와 무관하게 원하는 파워를 출력할 수 있도록 한다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frequency band converting circuit of an induction heating cooker. Conventionally, when a ferromagnetic container is mounted on a working coil, a reactance value (L) is fixed and a resonance frequency is formed according to the value of the resonance capacitor. In order to supply power with electric current, the current detector detects the current and generates the frequency accordingly. However, when a container with paramagnetic body is mounted, the reactance value is considerably lower than the reactance value of the container with ferromagnetic material. Since there is no frequency band, there was a problem that the frequency band should be changed. Accordingly, the present invention detects the amount of current flowing through the load to determine whether the load is ferromagnetic or paramagnetic, and then converts the capacitor value according to the control output of the microprocessor to change the frequency band so that the desired power is independent of the type of container. Enable output.

Description

유도가열조리기의 주파수대역 변환회로Frequency conversion circuit of induction cooker

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도는 종래 유도가열조리기의 가열장치 회로구성도, 제2도는 본 발명 유도가열조리기의 주파수대역 변환회로도.1 is a circuit diagram of a heating apparatus of a conventional induction cooker, Figure 2 is a frequency band conversion circuit diagram of the induction heating cooker of the present invention.

Claims (3)

입력 교류(AC)전원을 직류전압으로 정류하는 정류수단과, 상기 정류수단을 통해 정류된 직류전압을 공진시키고 그 공진전압에 의해 발생된 자장에 기인한 전기 유도효과로 가열되어질 조리용기에 와전류를 유도시켜 그 조리용기내의 음식을 원하는 가열온도로 가열하도록 하는 워킹코일과, 상기 정류수단에서 공급되는 직류전압을 스위칭제어신호에따라 스위칭하여 상기 워킹코일에 공진전압을 제공하는 인버터수단과, 상기 인버터수단의 스위칭소자를 제어하고자 하는스위칭제어신호를 출력하는 구동수단과, 상기 입력 교류전원(AC)에서 전류를 검출하는 전류검출수단과, 상기 전류검출수단을 통해 검출되는 전류의 양에 따라 부하의 유무 및 조리용기의 재질을 판정하고 그에 따른 전압을 출력하는 부하검지및 전압변환수단을 갖는 유도조리기에 있어서, 상기 부하검지 및 전압변환수단에서 판정한 조리용기 재질을 인식하고 그에 따른 제어신호를 출력하는 마이크로프로세서와, 상기 부하검지 및 전압변환수단의 출력에 따라 콘덴서 값을 변환시켜주파수 발생수단의 주파수대역을 바꾸어주어 영기가 상자성체이든 강자성체이든 가열이 가능하도록 하는 주파수 대역 변환수단을 포함하여 구성한 것을 특징으로 하는 유도가열조리기의 주파수 대역 변환회로.A rectifying means for rectifying the input AC power to a DC voltage and resonating the DC voltage rectified through the rectifying means and applying an eddy current to the cooking vessel to be heated by an electric induction effect due to the magnetic field generated by the resonance voltage. A working coil for inducing and heating food in the cooking vessel to a desired heating temperature, an inverter means for switching a DC voltage supplied from the rectifying means according to a switching control signal to provide a resonance voltage to the working coil, and the inverter Drive means for outputting a switching control signal for controlling the switching element of the means, current detection means for detecting current from the input AC power source AC, and load of the load according to the amount of current detected through the current detection means. Induction cooker having a load detection and voltage conversion means for determining the presence and absence of the cooking vessel material and output the voltage accordingly Then, the microprocessor recognizes the material of the cooking vessel determined by the load detection and voltage conversion means and outputs a control signal according thereto, and converts the capacitor value according to the output of the load detection and voltage conversion means to generate the frequency of the frequency generating means. A frequency band converting circuit of an induction heating cooker comprising a frequency band converting means for changing a band and allowing heating of either a paramagnetic or a ferromagnetic material. 제1항에 있어서, 마이크로프로세서는 강자성체일때는 그의 출력단자로 하이신호를 출력하고, 상자성체일때는 로우신호를 출력하도록 한 것을 특징으로 하는 유도가열조리기의 주파수대역 변환회로.The frequency band conversion circuit of an induction heating cooker according to claim 1, wherein the microprocessor outputs a high signal to its output terminal when the ferromagnetic material and a low signal when the paramagnetic material is used. 제1항에 있어서, 주파수 변환수단은 강자성체일때는 주파수대역을 낮게하고 상자성체일때는 주파수대역을 높여주도록 한 것을 특징으로 하는 유도가열조리기의 주파수대역 변환회로.The frequency band converting circuit of an induction heating cooker according to claim 1, wherein the frequency converting means lowers the frequency band in the case of a ferromagnetic material and increases the frequency band in the case of a paramagnetic material. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950012781A 1995-05-22 1995-05-22 Frequency band conversion circuit of induction cooker KR0152836B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950012781A KR0152836B1 (en) 1995-05-22 1995-05-22 Frequency band conversion circuit of induction cooker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950012781A KR0152836B1 (en) 1995-05-22 1995-05-22 Frequency band conversion circuit of induction cooker

Publications (2)

Publication Number Publication Date
KR960043984A true KR960043984A (en) 1996-12-23
KR0152836B1 KR0152836B1 (en) 1998-12-15

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ID=19415066

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950012781A KR0152836B1 (en) 1995-05-22 1995-05-22 Frequency band conversion circuit of induction cooker

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KR (1) KR0152836B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114172166A (en) * 2021-12-07 2022-03-11 阳光电源股份有限公司 Voltage generating device and high-frequency generation control method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114172166A (en) * 2021-12-07 2022-03-11 阳光电源股份有限公司 Voltage generating device and high-frequency generation control method thereof

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Publication number Publication date
KR0152836B1 (en) 1998-12-15

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