KR970070774A - Microwave input voltage sensing circuit and sensing method - Google Patents

Microwave input voltage sensing circuit and sensing method Download PDF

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Publication number
KR970070774A
KR970070774A KR1019960012277A KR19960012277A KR970070774A KR 970070774 A KR970070774 A KR 970070774A KR 1019960012277 A KR1019960012277 A KR 1019960012277A KR 19960012277 A KR19960012277 A KR 19960012277A KR 970070774 A KR970070774 A KR 970070774A
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KR
South Korea
Prior art keywords
circuit
voltage
constant
input
interrupt
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KR1019960012277A
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Korean (ko)
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KR100217201B1 (en
Inventor
오상훈
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구자홍
Lg 전자주식회사
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Priority to KR1019960012277A priority Critical patent/KR100217201B1/en
Publication of KR970070774A publication Critical patent/KR970070774A/en
Application granted granted Critical
Publication of KR100217201B1 publication Critical patent/KR100217201B1/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
    • H05B6/64—Heating using microwaves
    • H05B6/66—Circuits
    • H05B6/662—Aspects related to the boost transformer of the microwave heating apparatus
    • 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)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electric Ovens (AREA)
  • Control Of High-Frequency Heating Circuits (AREA)

Abstract

본 발명은 전자레인지의 입력전압 감지회로 및 감지방법에 관한 것으로 특히, 트랜스(1), 정류 및 평활회로부(2), 정전압 회로부(3), 마이컴(4) 및 인터럽트 회로부(5)를 구비한 기존의 전자레인지 제어회로에, 상기 정전압 회로부(2)의 출력 단자사이에 분배저항(R1,R2)을 설치한 구성을 갖고 상기 인터럽트 회로부(5)에 위상제어용 토글신호를 발생시켜 주는 인터럽트 타이밍 제어회로부(7)를 부가시켜 아날로그 입력포트 및 A/D 컨버터가 구비되어 있지 않은 비교적 저가의 마이컴을 통해서도 입력전압을 감지할 수 있도록 하므로써, 제품의 생산 원가를 대폭 절감시킬 수 있는 것이다.The present invention relates to an input voltage sensing circuit and a sensing method for a microwave oven, and more particularly to a microwave oven having an input voltage sensing circuit and a sensing method for a microwave oven having a transformer 1, a rectifying and smoothing circuit 2, a constant voltage circuit 3, a microcomputer 4 and an interrupt circuit 5 An interruption timing control circuit for generating a phase control toggle signal in the interruption circuit section (5) having a configuration in which distribution resistors (R1, R2) are provided between output terminals of the constant voltage circuit section (2) By adding the circuit portion 7, the input voltage can be sensed even through a comparatively low-cost microcomputer not provided with the analog input port and the A / D converter, thereby greatly reducing the production cost of the product.

Description

전자레인지의 입력전압 감지회로 및 감지방법Microwave input voltage sensing circuit and sensing method

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.

제2도는 본 발명의 입력전압 감지회로도, 제3도의 (가)~(나)는 본 발명에 의해 입력전압을 감지할시의 각부 동작 파형도, 제4도는 본 발명의 인터럽트 위상제어 원리도, 제5도는 본 발명 방법을 설명하기 위한 플로우챠트.FIG. 3 is a waveform diagram of each part when detecting an input voltage according to the present invention, FIG. 4 is an interrupt phase control principle of the present invention, FIG. FIG. 5 is a flow chart for explaining the method of the present invention. FIG.

Claims (2)

트랜스의 2차측에 유도되어 출력되는 교류전압을 직류전압으로 정류 평활시켜 주는 정류 및 평활회로부와; 상기 정류 및 평활회로부에서 출력되는 직류전압을 일정전압으로 변화시켜 각부에 인가시켜 주는 정전압 회로부와; 소정 프로그램에 의해 전자레인지의 전반적인 제어기능을 수행하는 마이컴과; 상기 트랜스의 2차측에서 출력되는 교류전압신호를 구형파신호로 변환시켜 마이컴의 인터럽트단자에 공급시켜 주는 인터럽트 회로부로 구성된 전자레인지의 제어회로에 있어서, 상기 정전압 회로부의 출력전압에 따라 상기 인터럽트 회로부에 서로 다른 위상을 갖는 토글신호를 발생시켜 주는 인터럽트 타이밍 제어회로부를 부가시켜서 된 것을 특징으로 하는 전자레인지의 입력전압 감지회로.A rectifying and smoothing circuit part for rectifying and smoothing an AC voltage induced and outputted to the secondary side of the transformer to a DC voltage; A constant voltage circuit unit for changing the DC voltage output from the rectifying and smoothing circuit unit to a constant voltage and applying the constant voltage to each part; A microcomputer for performing an overall control function of the microwave oven by a predetermined program; A control circuit for converting an AC voltage signal output from a secondary side of the transformer into a rectangular wave signal and supplying the converted AC voltage signal to an interrupt terminal of a microcomputer, the control circuit comprising: And an interrupt timing control circuit unit for generating a toggle signal having a different phase is added to the input voltage detection circuit of the microwave oven. 입력포트의 상태변수를 읽고 타이머의 카운트 변수를 “0”으로 클리어시킨 다음 일정시간 지연후 입력포트를 통해 입력되는 인터럽트 회로부의 출력신호가 상태변수와 같은지 검출하여 같으면 카운트 변수를 1씩 증가시키고, 입력포트를 통해 입력되는 인터럽트 회로부의 출력신호가 상태변수와 같지 않으면 회로정수에 의해결정된 기준 카운트 값에서 타이머의 카운트 변수를 뺀 결과에 회로정수에 의해 결정된 비례상수를 곱한 값을 감지된 입력전압으로 하는 과정으로 이루어진 인터럽트 서브루틴과; 회로정수에 의해 결정된 기준전압에서 상기 인터럽트 서브루틴에서 계산된 입력저압을 뺀 결과에 회로정수에 의해 결정된 지연시간 비례상수를 곱한 값을 릴레이 온/오프 지연시간 변수로 하고, 이어서 일정시간 지연후 상기 릴레이 온/오프 지연시간 변수가 “0”인지를 검출하여 “0”이면 릴레이 온/오프 지연시간 변수를 1씩 감소시키고, “0”이 아니면 릴레이 온/오프신호를 출력시키는 과정으로 이루어진 릴레이 온/오프제어 서브루틴; 으로 이루어진 것을 특징으로 하는 전자레인지의 입력전압 감지방법.When the count value of the timer is cleared to "0" after the state variable of the input port is cleared, it is detected whether the output signal of the interrupt circuit input through the input port is the same as the state variable after a certain time delay, If the output signal of the interrupt circuit input through the input port is not the same as the state variable, the result obtained by subtracting the count value of the timer from the reference count value determined by the circuit constant multiplied by the proportional constant determined by the circuit constant is used as the sensed input voltage An interrupt subroutine comprising: A value obtained by multiplying the result obtained by subtracting the input low voltage calculated in the interrupt subroutine from the reference voltage determined by the circuit constant by the delay time proportional constant determined by the circuit constant is set as a relay on / off delay time variable, Off relay delay time variable by 1 if the relay on / off delay time variable is " 0 " and outputs a relay on / off signal when it is not " 0 " / Off control subroutine; And outputting the detected input voltage to the microwave oven. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is disclosed by the contents of the first application.
KR1019960012277A 1996-04-22 1996-04-22 Input voltage sensing circuit and method for microwave oven KR100217201B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019960012277A KR100217201B1 (en) 1996-04-22 1996-04-22 Input voltage sensing circuit and method for microwave oven

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019960012277A KR100217201B1 (en) 1996-04-22 1996-04-22 Input voltage sensing circuit and method for microwave oven

Publications (2)

Publication Number Publication Date
KR970070774A true KR970070774A (en) 1997-11-07
KR100217201B1 KR100217201B1 (en) 1999-09-01

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KR1019960012277A KR100217201B1 (en) 1996-04-22 1996-04-22 Input voltage sensing circuit and method for microwave oven

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