KR950003942A - Electronic proportional control device - Google Patents

Electronic proportional control device Download PDF

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Publication number
KR950003942A
KR950003942A KR1019930012470A KR930012470A KR950003942A KR 950003942 A KR950003942 A KR 950003942A KR 1019930012470 A KR1019930012470 A KR 1019930012470A KR 930012470 A KR930012470 A KR 930012470A KR 950003942 A KR950003942 A KR 950003942A
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KR
South Korea
Prior art keywords
signal
duty ratio
proportional valve
outputting
electromagnetic proportional
Prior art date
Application number
KR1019930012470A
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Korean (ko)
Inventor
조장욱
Original Assignee
김연수
삼성중공업 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 김연수, 삼성중공업 주식회사 filed Critical 김연수
Priority to KR1019930012470A priority Critical patent/KR950003942A/en
Publication of KR950003942A publication Critical patent/KR950003942A/en

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Abstract

본 발명은 유압기계용 전자비례밸브를 스위치용 트랜지스터로 구동하는 전자비례밸브의 제어장치에 관한 것으로서, 그 구성은 디더신호성분이 포함된 디지탈 조작신호를 출력하는 마이크로 프로세서와, 상기 출력신호를 증폭하는 증폭기와, 스위칭신호를 출력하는 발진부와, 상기 스위칭신호와 상기 조작신호를 합성하여 상기 스위칭용 트랜지스터를 구동하는 신호를 출력하는 신호합성부 및, 상기의 전자비례밸브의 피이드백전압을 검출하는 저항을 부가하여, 이미 설정된 기준전압과 상기의 피이드백전압의 크기를 비교하고, 과전류로 인식하게 되면 현재의 듀티비에서 변동량에 해당하는 듀티비를 더하여 출력하며, 저전류로 인식하게 되면 현재의 듀티비에서 변동량에 해당하는 듀티비를 더하여 출력하는 것으로, 전자비례밸브를 스위칭하는 트랜지스터를 구형파신호로 구동하므로써 상기 트랜지스터의 발열현상을 제거하여 제어회로의 안정화를 도모할 수 있고, 마이크로프로세서에서 직류 디더신호를 발생시키므로써 정전류를 제어하므로써 별도의 디더발생부를 설치하지 않게 되기 때문에 회로의 구성이 간단하다.The present invention relates to a control device for an electromagnetic proportional valve for driving an electromagnetic proportional valve for a hydraulic machine as a switching transistor, the configuration of which includes a microprocessor for outputting a digital operation signal including a dither signal component, and amplifying the output signal. An amplifier, an oscillator for outputting a switching signal, a signal synthesizer for synthesizing the switching signal and the operation signal to output a signal for driving the switching transistor, and detecting a feedback voltage of the electromagnetic proportional valve. By adding a resistor, it compares the magnitude of the feedback voltage with the preset reference voltage, and if it is recognized as an overcurrent, it adds the duty ratio corresponding to the variation from the current duty ratio and outputs it. The duty ratio for switching the electromagnetic proportional valve by outputting the duty ratio corresponding to the variation amount from the duty ratio. By driving the transistor as a square wave signal, it is possible to stabilize the control circuit by eliminating the heat generation of the transistor, and by controlling the constant current by generating a DC dither signal from the microprocessor, a separate dither generator is not installed. The configuration of the circuit is simple.

Description

전자비례 밸브의 제어장치Electronic proportional control device

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

제1도는 종래의 전자비례밸브의 제어장치의 회로도, 제2도는 본 발명의 실시예에 따른 전자비례밸브의 제어장치의 회로도, 제3도는 제2도의 주요부분에서의 각출력신호의 파형도, 제4도는 제2도는 발진부의 상세회로도.1 is a circuit diagram of a conventional control device of an electromagnetic proportional valve, FIG. 2 is a circuit diagram of a control device of an electromagnetic proportional valve according to an embodiment of the present invention, FIG. 3 is a waveform diagram of each output signal in the main part of FIG. 4 is a detailed circuit diagram of the oscillator.

Claims (1)

유압기계용 전자비례밸브(60)를 스위칭용 트랜지스터(50)로 구동하는 전자비례밸브의 제어장치에 있어서 디더신호성분이 포함된 디지탈 조작신호를 출력하는 마이크로프로세서(80)와, 상기 출력신호를 증폭하는 증폭기(40)와 스위칭 신호를 출력하는 발진부(90)와 상기 스위칭신호와 상기 조작신호를 합성하여 상기 스위칭용 트랜지스터(50)를 구동하는 신호를 출력하는 신호합성부(100)및, 상기의 전자비례밸브(60)의 피이드백전압을 검출하는 저항(70)을 포함하여, 상기의 마이크로프로세서(80)는 상기의 피이드백 전압을 디지탈 신호로 변환하는 아날로그 -디지탈 변환기(81)를 내장하여, 이미 설정된 기준전압과 상기의 피이드백전압의 크기를 비교하여, 과전류로 인식하게 되면 현재의 듀티비에서 변동량에 해당하는 듀티비를 더하여 출력하고, 저전류로 인식하게 되면 현재의 듀티비에서 변동량에 해당하는 듀티비를 더하여 출력하는 것을 특징으로 하는 전자비례밸브의 제어장치.A microprocessor (80) for outputting a digital operation signal containing a dither signal component in a control device of an electromagnetic proportional valve for driving an electromagnetic proportional valve (60) for a hydraulic machine with a switching transistor (50), and outputting the output signal. An amplifier 40 for amplifying, an oscillator 90 for outputting a switching signal, a signal synthesizer 100 for outputting a signal for driving the switching transistor 50 by combining the switching signal and the operation signal, and the The microprocessor 80 includes an analog-to-digital converter 81 that converts the feedback voltage into a digital signal, including a resistor 70 that detects a feedback voltage of the electromagnetic proportional valve 60. By comparing the preset reference voltage with the magnitude of the feedback voltage, if it is recognized as an overcurrent, it adds the duty ratio corresponding to the variation amount from the current duty ratio and outputs the low current. When expression of the electric proportional valve, characterized in that in addition to the output of the duty ratio corresponding to the variation in the duty ratio of the current control device. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930012470A 1993-07-03 1993-07-03 Electronic proportional control device KR950003942A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930012470A KR950003942A (en) 1993-07-03 1993-07-03 Electronic proportional control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930012470A KR950003942A (en) 1993-07-03 1993-07-03 Electronic proportional control device

Publications (1)

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KR950003942A true KR950003942A (en) 1995-02-17

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KR1019930012470A KR950003942A (en) 1993-07-03 1993-07-03 Electronic proportional control device

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100833674B1 (en) * 2006-08-09 2008-05-29 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 Electronic valve control circuit which uses a feedback resistance

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100833674B1 (en) * 2006-08-09 2008-05-29 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 Electronic valve control circuit which uses a feedback resistance

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