KR930024536A - Over power protection device of inverter microwave oven - Google Patents

Over power protection device of inverter microwave oven Download PDF

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Publication number
KR930024536A
KR930024536A KR1019920008096A KR920008096A KR930024536A KR 930024536 A KR930024536 A KR 930024536A KR 1019920008096 A KR1019920008096 A KR 1019920008096A KR 920008096 A KR920008096 A KR 920008096A KR 930024536 A KR930024536 A KR 930024536A
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KR
South Korea
Prior art keywords
unit
output
current
control unit
protection device
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Application number
KR1019920008096A
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Korean (ko)
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KR940005470B1 (en
Inventor
이창우
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이헌조
주식회사 금성사
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Priority to KR1019920020096A priority Critical patent/KR940005470B1/en
Publication of KR930024536A publication Critical patent/KR930024536A/en
Application granted granted Critical
Publication of KR940005470B1 publication Critical patent/KR940005470B1/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
    • H05B6/64—Heating using microwaves
    • H05B6/66—Circuits
    • H05B6/68—Circuits for monitoring or control

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Control Of High-Frequency Heating Circuits (AREA)
  • Inverter Devices (AREA)

Abstract

본 발명은 인버터 전자레인지의 과출력보호장치에 관한 것으로, 종래에는 세트의 특성변화나 심한 충격에 의하여 일정출력이 틀어질 경우가 있을때 높은 출ㄹ력으로 인한 부품의 소손이 발생되었다.The present invention relates to an overpower protection device for an inverter microwave oven. In the related art, when a constant output is changed due to a change in characteristics of a set or a severe impact, a burnout of a component due to high output power occurs.

따라서, 본 발명은 상기와 같은 종래의 과출력으로 인한 세트의 파손을 막기 위하여 과출력으로 동작시 과출력으로 인하여 입력전류가 높아지면 이 입력전류를 감지하여 출력을 낮추므로써 정상출력 또는 일정출력으로 동작하도록 하여, 인버터 전자레인지의 신뢰성 향상과 SMPS(Switching Mode Power Supply:SMPS) 기술분야에 적용되는 이점이 있게 된다.Therefore, the present invention detects the input current when the input current is increased due to the over output when operating in the over output in order to prevent damage to the set due to the conventional over output as described above by reducing the output to the normal output or constant output By operating, it is possible to improve the reliability of the inverter microwave oven and to apply it to the switching mode power supply (SMPS) technology field.

Description

인버터 전자레인지의 과출력 보호장치Over power protection device of inverter microwave oven

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

제1도는 종래 인버터 전자레인지의 출력제어장치 블럭구성도, 제2도는 본 발명 인버터 전자레인지의 과출력보호장치 블럭구성도, 제3도는 제2도에서 과출력보호장치의 상세회로도.1 is a block diagram of an output control device of a conventional inverter microwave oven, FIG. 2 is a block diagram of an overpower protection device of an inverter microwave oven of the present invention, and FIG. 3 is a detailed circuit diagram of an overpower protection device of FIG.

Claims (2)

교류전원의 전도성 노이즈를 제거하는 필터부(1)와, 상기 필터부(1)를 통한 교류전원을 정류 및 평활하는 정류부(1)및 평활부(3)와, 높은 주파수의 스위칭을 일으키는 스위칭부(4)와, 상기 스위칭부(4)로부터의 높은 주파수를 고압으로 변경시키는 고압트랜스(L2)와, 상기 고압을 반파배전압시켜 그 반바배전압에 의해 마그네트론(6)이 구동되는 마그네트론구동부(5)와, 동기신호를 출력하여 발진부(8)로 하여금 주파수를 변경시키도록 하는 동기부(7)와, 일정출력을 유지하기 위해 동작하는 과전압보호부(9)와, 마그네트론(6)의 애노드 전류를 감지하여 일정전류로 출력되게 하는 전류제어부(10)와, 전원을 공급하는 전원제어부(12)와 , 상기 발진부(8) 과전압보호부(9)전류제어부(10) 전원제어부(12)의 동작에 따라 스위칭구동부(13)의 주파수를 변경시켜 스위칭부(4)내 스위칭소자의 온/오프타임을 조절하는 출력조절부(11)와, 과대출력으로 변경되는 입력전류의 변화를 감지하여 상기 출력조절부(11)의 동작을 제어하는 과출력보호장치(14)로 구성함을 특징으로 한는 인버터 전자레인지의 과출력보호장치.Filter unit 1 for removing conductive noise of AC power, rectifying unit 1 and smoothing unit 3 for rectifying and smoothing AC power through the filter unit 1, and switching unit for switching high frequency (4), a high voltage transformer (L 2 ) for changing a high frequency from the switching unit (4) to a high voltage, and a magnetron driving unit for driving the magnetron (6) by half the double voltage by half the voltage of the high voltage. (5), a synchronizing unit (7) for outputting a synchronizing signal to cause the oscillating unit (8) to change frequency, an overvoltage protection unit (9) operating to maintain a constant output, and a magnetron (6) A current control unit 10 for sensing an anode current and outputting a constant current, a power control unit 12 for supplying power, the oscillation unit 8, an overvoltage protection unit 9, a current control unit 10, and a power control unit 12 By changing the frequency of the switching driver 13 in accordance with the operation of the switching unit (4) The output control unit 11 for adjusting the on / off time of the switching element in the), and the over output protection device 14 for controlling the operation of the output control unit 11 by detecting a change in the input current changed to the excessive output Over output protection device of the inverter microwave oven characterized in that consisting of. 제1항에 있어서, 상기 과출력보호장치(14)는 전류트랜스(CT1)에 의해 입력전류의 변화를 감지한 후 그 감지된 전류를 브리지다이오드(BD201)및 콘덴서(C201)에 의해 정류 및 직류화하고,저항(R101),(R102)에 의한 바이어스전압(VA)을 연산증폭기(OP101)의 반전단자(-)에입력하여 그 비반전단자(+)에 입력되는 기준전압(VF)과 비교하며, 그 비교된 출력전압(VG)으로 트랜지스터(Q101)를 구동시켜 상기 출력조절부(11)의 출력을 조절하도록 구성된것을 특징으로 하는 인버터 전자레인지의 과출력보호장치.According to claim 1, wherein the over-power protection device 14 detects the change in the input current by the current transformer (CT 1 ) and then the detected current by the bridge diode (BD 201 ) and the capacitor (C 201 ) Rectification and direct current, and the bias voltage (V A ) by the resistors (R 101 , R 102 ) is input to the inverting terminal (-) of the operational amplifier (OP 101 ) and input to the non-inverting terminal (+). Compared to the reference voltage (V F ), and drive the transistor (Q 101 ) with the compared output voltage (V G ) to adjust the output of the output control unit 11 characterized in that Output protection device. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920020096A 1992-05-13 1992-05-13 Over output protection apparatus of inveter microwave oven KR940005470B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019920020096A KR940005470B1 (en) 1992-05-13 1992-05-13 Over output protection apparatus of inveter microwave oven

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019920020096A KR940005470B1 (en) 1992-05-13 1992-05-13 Over output protection apparatus of inveter microwave oven

Publications (2)

Publication Number Publication Date
KR930024536A true KR930024536A (en) 1993-12-22
KR940005470B1 KR940005470B1 (en) 1994-06-18

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KR1019920020096A KR940005470B1 (en) 1992-05-13 1992-05-13 Over output protection apparatus of inveter microwave oven

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6479803B2 (en) 2000-12-06 2002-11-12 Samsung Electronics Co., Ltd. Microwave oven and control method thereof

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105485731B (en) * 2015-12-29 2017-10-31 广东美的厨房电器制造有限公司 Microwave oven circuit and micro-wave oven

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6479803B2 (en) 2000-12-06 2002-11-12 Samsung Electronics Co., Ltd. Microwave oven and control method thereof

Also Published As

Publication number Publication date
KR940005470B1 (en) 1994-06-18

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