KR940027628A - Control circuit of inverter device - Google Patents

Control circuit of inverter device Download PDF

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Publication number
KR940027628A
KR940027628A KR1019930008660A KR930008660A KR940027628A KR 940027628 A KR940027628 A KR 940027628A KR 1019930008660 A KR1019930008660 A KR 1019930008660A KR 930008660 A KR930008660 A KR 930008660A KR 940027628 A KR940027628 A KR 940027628A
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KR
South Korea
Prior art keywords
switching
unit
control
signal
switching transistor
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Application number
KR1019930008660A
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Korean (ko)
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KR960009357B1 (en
Inventor
한경해
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이헌조
주식회사 금성사
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Priority to KR93008660A priority Critical patent/KR960009357B1/en
Publication of KR940027628A publication Critical patent/KR940027628A/en
Application granted granted Critical
Publication of KR960009357B1 publication Critical patent/KR960009357B1/en

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Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00Heating by electric, magnetic or electromagnetic fields
    • H05B6/02Induction heating
    • H05B6/06Control, e.g. of temperature, of power

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Inverter Devices (AREA)
  • Electronic Switches (AREA)
  • Stand-By Power Supply Arrangements (AREA)

Abstract

본 발명은 전자레인지 및 유도가열기(쿡커, 밥솥)등의 인버터 장치에 관한 것으로, 특히 스위칭 소자에 과전압이 인가될때 세트의 파손을 방지하도록한 것이다.The present invention relates to an inverter device such as a microwave oven and an induction heater (cooker, rice cooker), in particular to prevent damage to the set when an overvoltage is applied to the switching element.

본 발명은 트랜스에 유기되는 부하의 유,무에 따라 입력소비전류검지 및 스위칭 트랜지스터의 양단에 인가되는 전압을 맞추어 고전류가 입력되면 스위칭 트랜지스터의 양단에 인가되는 전압을 높게 혀용하고, 부하가 없을때 저전류가 입력되면 스위칭 트랜지스터 양단에 인가되는 전압이 낮아지도록 온타임을 줄임으로서 갑작스러운 부하가 입력시 스위칭 트랜지스터에 흐르는 전류 및 양단에 인가되는 전압을 사전에 차단시켜 상기 스위칭 트랜지스터의 파손을 방지하도록 한 것으로 전자레인지, 유도가열기의 인버터에 적용한다.According to the present invention, when the high current is inputted by detecting the input current consumption and the voltage applied to both ends of the switching transistor according to the presence or absence of the load induced in the transformer, the voltage applied to both ends of the switching transistor is high, and when there is no load When the low current is inputted, the on-time is reduced so that the voltage applied across the switching transistor is lowered so that the sudden load cuts off the current flowing through the switching transistor and the voltage applied at both ends in advance to prevent breakage of the switching transistor. One applies to inverters of microwave ovens and induction heaters.

Description

인터버 장치의 제어회로Control circuit of the interleaver

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

제 3 도는 본 발명 인버터 장치의 제어회로도. 제 4 도의 (가) - (마)는 본 발명 제어회로의 각부 파형도. 제 5 도는 본 발명 제어회로내에 구비된 로직부의 결과표.3 is a control circuit diagram of the inverter device of the present invention. 4A to 4E are waveform diagrams of respective parts of the control circuit of the present invention. 5 is a result table of a logic unit provided in the control circuit of the present invention.

Claims (2)

각 부를 제어하는 마이크로 프로세서부(9)의 출력신호를 제어하는 인터버 출력제어부(19)와, 인버터 출력제어부(19)의 제어신호아 AC 입력단에서 피이드백되어 입력된 전류에 의해, 인버터 출력 스위칭 구동용 트랜지스터(Q1) 양단에 과전류 인가시, 스위칭 구동시간을 제어하여 입력된 과전류를 제어하는 스위칭 제어부(20)와, 상기 스위칭 제어부(20)의 제어신호에 의해 인버터 출력 스위칭 구동용 트랜지스터(Q1)를 구동제어하는 구동부(8)로 구성된 것을 특징으로 한 인버터 장치의 제어회로.Inverter output switching by the inverter output control unit 19 which controls the output signal of the microprocessor unit 9 which controls each unit, and the feedback signal input from the AC input terminal of the control signal of the inverter output control unit 19, and the inverter output switching. When the overcurrent is applied across the driving transistor Q1, the switching control unit 20 controls the switching over time to control the input overcurrent, and the inverter output switching driving transistor Q1 according to the control signal of the switching control unit 20. Control circuit of the inverter device, characterized in that consisting of a drive unit (8) for driving control. 제 1 항에 있어서, 스위칭 제어부(20)는, 인버터 출력제어부(19)에서 출력된 제어신호와, AC입력단에서 피이드백되어 입력된 전류를 비교하는 비교부(12)와, 인버터 출력 스위칭 구동용 트랜지스터(Q1) 양단 사이의 저항(R9)(R10)에 의한 분배전압과, AC입력단에서 피이드백되어 입력된 전류신호를 비교하는 비교부(13)와, 상기 저항(R9)(R10)에 의한 분배전압과, 최초구동을 위한 저항(R11)(R12)에 의한 분배전압을 비교하는 비교부(14)와, 상기 스위칭 트랜지스터(Q1) 양단 사이의 저항(R9)(R10)에 의한 분배전압과, 기준전압을 설정하기 위해 저항(R13)(R14)에 의한 분배전압을 비교하여 스위칭 트랜지스터(Q1)의 양단전압이 높을때 스위칭 트랜지스터(Q1)가 오프되도록 리세트시켜주는 비교부(15)와, 상기 각 비교부(12)(13)(14)의 비교신호를 디코드하여 스위칭 트랜지스터(Q1)의 온타임을 제어하는 로직부(16)와, 로직부(16)의 제어신호 입력시, 스위칭 트랜지스터(Q1)의 온타임을 업/다운 제어하는 업/다운 카운트부(17)와, 상기 업/다운 카운트부(17) 출력값에 의해 카운트를 수행하여 스위칭 온타임을 변경시켜 스위칭 구동신호를 출력하는 온타이머부(18)로 구성된 것을 특징으로 한 인버터 장치의 제어회로.The switching control unit 20 according to claim 1, wherein the switching control unit 20 includes a comparison unit 12 for comparing the control signal output from the inverter output control unit 19 with the current fed back from the AC input terminal, and for inverter output switching driving. The comparison unit 13 compares the divided voltage between the resistors R9 and R10 between the transistors Q1 and the current signal fed back from the AC input terminal, and the resistors R9 and R10. A division voltage between the comparison unit 14 which compares the division voltage and the division voltage by the resistors R11 and R12 for initial driving, and the resistors R9 and R10 between both ends of the switching transistor Q1; A comparison unit 15 which compares the divided voltages of the resistors R13 and R14 to set the reference voltage and resets the switching transistor Q1 to be turned off when the voltage across the switching transistor Q1 is high. Decode the comparison signal of each of the comparators 12, 13 and 14 to determine the switching transistor Q1. A logic unit 16 for controlling time, an up / down count unit 17 for up / down controlling the on-time of the switching transistor Q1 when the control signal of the logic unit 16 is input, and the up / down A control circuit of an inverter device, comprising: an on-timer unit 18 for outputting a switching drive signal by performing a count based on an output value of the counting unit 17 to change the switching on-time. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR93008660A 1993-05-20 1993-05-20 Inverter control circuit for range KR960009357B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR93008660A KR960009357B1 (en) 1993-05-20 1993-05-20 Inverter control circuit for range

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR93008660A KR960009357B1 (en) 1993-05-20 1993-05-20 Inverter control circuit for range

Publications (2)

Publication Number Publication Date
KR940027628A true KR940027628A (en) 1994-12-10
KR960009357B1 KR960009357B1 (en) 1996-07-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR93008660A KR960009357B1 (en) 1993-05-20 1993-05-20 Inverter control circuit for range

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KR960009357B1 (en) 1996-07-18

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