KR890016739A - Frequency variable circuit of general purpose inverter - Google Patents

Frequency variable circuit of general purpose inverter Download PDF

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Publication number
KR890016739A
KR890016739A KR1019880004305A KR880004305A KR890016739A KR 890016739 A KR890016739 A KR 890016739A KR 1019880004305 A KR1019880004305 A KR 1019880004305A KR 880004305 A KR880004305 A KR 880004305A KR 890016739 A KR890016739 A KR 890016739A
Authority
KR
South Korea
Prior art keywords
output
frequency
voltage
purpose inverter
microcomputer
Prior art date
Application number
KR1019880004305A
Other languages
Korean (ko)
Inventor
구영로
Original Assignee
안시환
삼성전자 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 안시환, 삼성전자 주식회사 filed Critical 안시환
Priority to KR1019880004305A priority Critical patent/KR890016739A/en
Publication of KR890016739A publication Critical patent/KR890016739A/en

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Abstract

내용 없음No content

Description

범용 인버어터의 주파수 가변회로Frequency variable circuit of general purpose inverter

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

첨부도면은 본 발명의 실시회로도.The accompanying drawings are embodiments of the present invention.

Claims (1)

펄스폭 변조회로에 공급되는 주파수를 가변함으로써 가변주파수의 교류출력을 얻도록 된 범용 인버어터에 있어서, 주파수설정부(1)의 출력전압과, 마이콤(3)의 출력을 아날로그 전압으로 변환시키기 위한 D/A 변환부(4)의 출력전압을 비교하는 전압비교부(2), 상기의 두 비교전압이 일치할 경우 상기의 마이콤(3)에 의해 상기의 D/A 변환부(4)의 출력전압을 일정하게 유지시키는 샘플링 앤드 호울더(5), 이 샘플링 앤드 호울더(5)의 출력과 상기의 마이콤(3)에 의해 제어되는 프로그램블 디바이더(6()의 출력주파수가 입력되는 주파수 - 전압변환부(7)의 출력을 비교하여 그 오차전압을 증폭하는 오차증폭기(8), 그리고 이 오차증폭기(8)의 출력에 따라 출력주파수가 가변되는 전압제어발진부(9)로 구성되어, 이 전압제어발진부(9)의 출력주파수가 상기의 프로그램블 디바이더(6)로 궤환하도록 함을 특징으로 하는 범용 인버어터의 주파수 가변회로.In the general-purpose inverter which obtains the AC output of a variable frequency by varying the frequency supplied to a pulse width modulation circuit, it is for converting the output voltage of the frequency setting part 1, and the output of the microcomputer 3 into an analog voltage. Voltage comparator 2 for comparing the output voltages of the D / A converter 4, and the output voltage of the D / A converter 4 by the microcomputer 3 when the two comparison voltages coincide. Sampling and holder (5) for keeping the constant constant, the output frequency of this sampling and holder (5) and the output frequency of the programmable divider (6) controlled by the microcomputer (3)-voltage An error amplifier 8 that compares the output of the converter 7 and amplifies the error voltage, and a voltage controlled oscillator 9 whose output frequency varies according to the output of the error amplifier 8, The output frequency of the control oscillator 9 is programmable A frequency variable circuit of a general-purpose inverter, characterized in that for feeding back to the divider (6). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019880004305A 1988-04-15 1988-04-15 Frequency variable circuit of general purpose inverter KR890016739A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019880004305A KR890016739A (en) 1988-04-15 1988-04-15 Frequency variable circuit of general purpose inverter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019880004305A KR890016739A (en) 1988-04-15 1988-04-15 Frequency variable circuit of general purpose inverter

Publications (1)

Publication Number Publication Date
KR890016739A true KR890016739A (en) 1989-11-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019880004305A KR890016739A (en) 1988-04-15 1988-04-15 Frequency variable circuit of general purpose inverter

Country Status (1)

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KR (1) KR890016739A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100899888B1 (en) * 2007-12-21 2009-05-29 삼성전기주식회사 Apparatus and method to control brightness of led using pulse frequency modulation
KR100935321B1 (en) * 2007-12-20 2010-01-06 삼성전기주식회사 Apparatus and Method to control brightness of LED using Digital Code

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100935321B1 (en) * 2007-12-20 2010-01-06 삼성전기주식회사 Apparatus and Method to control brightness of LED using Digital Code
KR100899888B1 (en) * 2007-12-21 2009-05-29 삼성전기주식회사 Apparatus and method to control brightness of led using pulse frequency modulation

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E601 Decision to refuse application