KR960006275A - Pulse Width Modulation (PWM) Signal Generator - Google Patents

Pulse Width Modulation (PWM) Signal Generator Download PDF

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Publication number
KR960006275A
KR960006275A KR1019940016191A KR19940016191A KR960006275A KR 960006275 A KR960006275 A KR 960006275A KR 1019940016191 A KR1019940016191 A KR 1019940016191A KR 19940016191 A KR19940016191 A KR 19940016191A KR 960006275 A KR960006275 A KR 960006275A
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KR
South Korea
Prior art keywords
signal
pwm
output
generator
pwm signal
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Application number
KR1019940016191A
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Korean (ko)
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KR100331793B1 (en
Inventor
양순배
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이헌조
엘지전자 주식회사
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Priority to KR1019940016191A priority Critical patent/KR100331793B1/en
Publication of KR960006275A publication Critical patent/KR960006275A/en
Application granted granted Critical
Publication of KR100331793B1 publication Critical patent/KR100331793B1/en

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K7/00—Modulating pulses with a continuously-variable modulating signal
    • H03K7/08—Duration or width modulation ; Duty cycle modulation

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  • Inverter Devices (AREA)

Abstract

본 발명은 디지탈 방식으로 PWM(Pulse Width Modulation)신호를 발생할 경우 생성되는 불필요한 파형을 제거하도록 한 PWM신호발생장치에 관한 것이다.The present invention relates to a PWM signal generator for removing unnecessary waveforms generated when a pulse width modulation (PWM) signal is generated in a digital manner.

종래의 PWM신호발생장치에서는 정현파가 삼각파보다 스텝적으로 많은 값을 증가하는 경우에 불필요한 PWM신호가 발생하여 전압파형의 왜형을 초래하며, 시스템의 효율이 저하되고 스위칭소자의 스트레스가 증가되는 문제점이 있었다.In the conventional PWM signal generator, when the sinusoidal wave increases more than a triangular wave step by step, an unnecessary PWM signal is generated, resulting in distortion of the voltage waveform, and the efficiency of the system is reduced and the stress of the switching element is increased. there was.

따라서 본 발명은 종래의 PWM신호발생장치에 디지탈 비교부의 출력과 삼각파 발생부의 업 또는 다운카운트 값을 받아 PWM보정출력신호를 발생하는 신호보정부를 더 구비함으로써 불필요한 PWM신호의 발생을 방지함으로써 PWM신호를 사용하는 시스템에서 전력소자의 스트레스 및 과열등을 방지하고 시스템의 효율을 높이며 전압파형의 왜형을 줄일 수 있도록 한 것이다.Accordingly, the present invention further includes a signal compensator for generating a PWM correction output signal by receiving the output of the digital comparator and the up or down count value of the triangular wave generator in the conventional PWM signal generator to prevent unnecessary PWM signal generation. It is designed to prevent stress and overheating of power devices, improve system efficiency, and reduce voltage waveform distortion.

Description

펄스폭변조(PWM) 신호발생장치Pulse Width Modulation (PWM) Signal Generator

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제4도는 본 발명의 PWM신호발생장치의 블럭 구성도.4 is a block diagram of a PWM signal generator according to the present invention.

Claims (2)

정현파신호를 디지탈값으로 발생하는 정현파 발생부와, 삼각파신호를 디지털값으로 발생하는 삼각파 발생부와, 상기 정현파 발생부와 삼각파 발생부의 출력을 비교하여 PWM신호를 발생하는 디지탈 비교부를 구비하는 PWM신호발생장치에 있어서, 상기 디지탈 비교부의 출력과 삼각파 발생부의 업 또는 다운 카운트 신호를 받아 PWM보정출력신호를 발생하는 신호보정부를 더 구비하여 구성됨을 특징으로 하는 PWM신호발생장치.PWM signal including a sinusoidal wave generator for generating a sine wave signal as a digital value, a triangle wave generator for generating a triangle wave signal as a digital value, and a digital comparator for comparing the output of the sinusoidal wave generator and a triangle wave generator to generate a PWM signal The generator according to claim 1, further comprising a signal compensator configured to receive the output of the digital comparator and the up or down count signal of the triangle wave generator to generate a PWM correction output signal. 제1항에 있어서, 상기 신호보정부는 상기 디지탈 발생부의 PWM출력신호를 반전시키는 제1, 제2반전기와, 상기 제1반전기의 출력과 삼각파 발생부의 업/다운 카운트 출력을 논리곱하는 엔드 게이트와, 상기 제2반전기의 출력과 삼각파 발생부의 업/다운 카운트출력을 논리합하여 반전하는 노아 게이트와, 상기 앤드 게이트의 출력에 의해 리셋되고 상기 노아 게이트의 출력에 의해 셋트되는 RS플립플롭으로 구성됨을 특징으로 하는 PWM신호발생장치.The digital signal generator of claim 1, wherein the signal compensator comprises: first and second inverters for inverting the PWM output signal of the digital generator, an end gate for performing an AND operation on the output of the first inverter and the up / down count output of the triangular wave generator; And an NOA gate for inverting and inverting the output of the second inverter and the up / down count output of the triangular wave generator, and an RS flip-flop reset by the output of the AND gate and set by the output of the NOA gate. PWM signal generator characterized in that. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940016191A 1994-07-06 1994-07-06 Pwm signal generation device KR100331793B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940016191A KR100331793B1 (en) 1994-07-06 1994-07-06 Pwm signal generation device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940016191A KR100331793B1 (en) 1994-07-06 1994-07-06 Pwm signal generation device

Publications (2)

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KR960006275A true KR960006275A (en) 1996-02-23
KR100331793B1 KR100331793B1 (en) 2002-08-08

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KR1019940016191A KR100331793B1 (en) 1994-07-06 1994-07-06 Pwm signal generation device

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100498556B1 (en) * 2003-03-26 2005-07-01 엘에스산전 주식회사 Capability enhancing method for pulse width modulation signal output apparatus
KR101251768B1 (en) * 2011-02-08 2013-04-05 중앙대학교 산학협력단 Digital pulse width modulator and controling method threof

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60153219A (en) * 1984-01-23 1985-08-12 Tamagawa Seiki Kk Generating circuit of pulse width modulating signal
JPS6397008A (en) * 1986-10-13 1988-04-27 Sawafuji Electric Co Ltd Generation circuit for pulse width modulated waveform
JPS6447121A (en) * 1987-08-18 1989-02-21 Mitsubishi Electric Corp Pulse width modulation signal generating circuit
JP2958962B2 (en) * 1988-12-14 1999-10-06 オムロン株式会社 PWM pulse generator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100498556B1 (en) * 2003-03-26 2005-07-01 엘에스산전 주식회사 Capability enhancing method for pulse width modulation signal output apparatus
KR101251768B1 (en) * 2011-02-08 2013-04-05 중앙대학교 산학협력단 Digital pulse width modulator and controling method threof

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Publication number Publication date
KR100331793B1 (en) 2002-08-08

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