KR960027223A - Triangular Wave Discrimination Circuit and Method - Google Patents

Triangular Wave Discrimination Circuit and Method Download PDF

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Publication number
KR960027223A
KR960027223A KR1019940037837A KR19940037837A KR960027223A KR 960027223 A KR960027223 A KR 960027223A KR 1019940037837 A KR1019940037837 A KR 1019940037837A KR 19940037837 A KR19940037837 A KR 19940037837A KR 960027223 A KR960027223 A KR 960027223A
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KR
South Korea
Prior art keywords
triangular wave
value
phase
wave
input
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KR1019940037837A
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Korean (ko)
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KR0156756B1 (en
Inventor
이상동
이선재
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김정국
현대중공업 주식회사
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Priority to KR1019940037837A priority Critical patent/KR0156756B1/en
Publication of KR960027223A publication Critical patent/KR960027223A/en
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Publication of KR0156756B1 publication Critical patent/KR0156756B1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
    • H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/66—Digital/analogue converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P2209/00—Indexing scheme relating to controlling arrangements characterised by the waveform of the supplied voltage or current
    • H02P2209/09—PWM with fixed limited number of pulses per period

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Multiple Motors (AREA)
  • Inverter Devices (AREA)

Abstract

본 발명의 삼각파 판별장치 및 판별방법은 모터의 구동속도를 제어하기 위하여 발생하는 삼각파의 레벨 및 오프셋(offset) 값을 판별하는 것으로서 종래에는 각각의 모터 구동회로의 삼각파 발생부에 사용되는 회로 부품의 차이로 인하여 발생되는 삼각파의 크기가 서로 상이하고, 이로 인하여 각각의 모터 구동장치마다 모터를 구동시키는 전압이 상이하여 모터의 회전속도가 상이하였다.The triangular wave discriminating apparatus and the discriminating method of the present invention are to determine the level and offset value of the triangular wave generated to control the driving speed of the motor. The magnitudes of the triangular waves generated by the differences are different from each other. As a result, the voltages for driving the motors are different for each motor driving device, and thus the rotation speeds of the motors are different.

본 발명은 삼각파 발생부에서 발생하는 삼각파를 3상 교류전원과 비교하여 삼각파의 레벨을 판단함과 아울러 삼각파의 듀티비를 판단하고, 판단한 삼각파의 레벨에 따라 3상 교류전원의 발생레벨을 조절함과 아울러 판단한 듀티비에 따라 3상 교류전원을 발생하는 오프셋값을 조절하여 각각의 모터 구동회로가 모터를 동일한 속도로 구동시킬 수 있다.The present invention compares the triangular wave generated by the triangular wave generating unit with the three-phase AC power source to determine the level of the triangular wave, determines the duty ratio of the triangular wave, and adjusts the generation level of the three-phase AC power source according to the determined triangular wave level. In addition, by adjusting the offset value for generating a three-phase AC power source according to the determined duty ratio, each motor driving circuit can drive the motor at the same speed.

Description

삼각파 판별회로 및 판별방법Triangular Wave Discrimination Circuit and Method

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

제1도는 본 발명의 판별회로도, 제2도는 본 발명의 판별방법을 보인 신호 흐름도.1 is a discrimination circuit diagram of the present invention, and FIG. 2 is a signal flowchart showing a discrimination method of the present invention.

Claims (3)

마이크로 프로세서(1)의 출력신호를 아날로그 신호로 변환하는 디지탈/아날로그 변환부(2∼4)와, 상기 디지탈/아날로그 변환부(2∼4)의 출력신호 극성을 상기 마이크로 프로세서(1)가 출력하는 제어신호(CS1∼CS3)에 따라 반전시켜 R상, S상 및 T상의 3상전원을 발생하는 극성 변환부(5∼7)와, 삼각파를 발생하는 삼각파 발생부(8)와, 상기 극성 변환부(5∼7)에서 출력되는 3상전원을 상기 삼각파 발생부(8)의 출력신호 레벨과 각기 비교하여 PWM파를 발생 및 상기 마이크로 프로세서(1)에 입력시키는 비교기(CP1∼CP3)를 구비하고, 상기 마이크로 프로세서(1)는 3상전원 발생을 제어하고 삼각파의 레벨 및 듀티비를 판단하여 3상전원의 발생레벨 및 오프셋값을 조절하는 것을 특징으로 하는 삼각파 판별회로.The microprocessor 1 outputs the output signal polarity of the digital / analog converters 2 to 4 and the digital / analog converters 2 to 4 that convert the output signal of the microprocessor 1 into an analog signal. A polarity converting unit 5 to 7 for inverting according to the control signals CS 1 to CS 3 to generate a three-phase power source for the R-phase, S-phase, and T-phase, a triangular wave generator 8 for generating a triangular wave, Comparators (CP 1 to 3) for generating a PWM wave and inputting it to the microprocessor 1 by comparing the three-phase power output from the polarity converting sections 5 to 7 with the output signal level of the triangular wave generating section 8, respectively. CP 3 ), wherein the microprocessor (1) controls the generation of three-phase power, and determines the level and duty ratio of the triangular wave to adjust the generation level and offset value of the three-phase power. 입력할 하나의 PWM파를 선택하고 레지스터(X)에 출력할 3상전원의 최대값을 저장 및 출력한 후 상기에서 선택한 PWM파가 입력되는 지를 판단하는 제1과정과, 상기 제1과정에서 PWM파가 입력되지 않을 경우에는 레지스터(X)에 저장된 값을 1단계 감소하고 1단계 감소한 값이 설정값 이하인지를 판단하여 설정값 이하가 아닐 경우에 상기 제1과정으로 복귀하여 레지스터(X)에 저장된 값을 출력 및 PWM파가 입력되는 지를 판단하는 동작을 반복하는 제2과정과, 상기 제2과정에서 1단계 감소한 값이 설정값 이하일 경우에는 시스템의 동작을 정지하는 제3과정과, 상기 제1과정에서 PWM파가 입력될 경우에 레지스터(X)의 값을 삼각파의 레벨값으로 저정하고 레지스터(X)의 값을 0으로 하여 출력한 후 입력되는 PWM파의 듀티비를 판단하는 제4과정과, 상기 제4과정에서 판단한 듀티비에 따라 출력할 3상전원의 오프셋값을 조절하는 제5과정으로 제어됨을 특징으로 하는 삼각파 판별방법.A first step of selecting one PWM wave to be input, storing and outputting the maximum value of the three-phase power source to be output to the register (X), and determining whether the selected PWM wave is input; and in the first step, PWM If the wave is not input, the value stored in the register X is decreased by one step, and it is determined whether the value reduced by one step is less than or equal to the set value. A second step of repeating an operation of determining whether a stored value is output and a PWM wave is input; a third step of stopping operation of the system when the value reduced by one step in the second step is less than or equal to a set value; In the first step, when the PWM wave is input, the fourth step of determining the duty ratio of the input PWM wave after storing the value of the register X as the triangular wave level value and outputting the value of the register X as 0 is output. And, determined in the fourth process A triangular wave detection method as claimed in claim 5, the control process for adjusting the offset value of the three-phase power to be output according to the duty ratio. 제2항에 있어서, 제2과정 및 제3과정의 설정값은 최대값의 0.8배로 설정하는 것을 특징으로 하는 삼각파 판별방법.The method of claim 2, wherein the setting values of the second process and the third process are set to 0.8 times the maximum value. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940037837A 1994-12-28 1994-12-28 Triangle discriminating circuit and method thereof KR0156756B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940037837A KR0156756B1 (en) 1994-12-28 1994-12-28 Triangle discriminating circuit and method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940037837A KR0156756B1 (en) 1994-12-28 1994-12-28 Triangle discriminating circuit and method thereof

Publications (2)

Publication Number Publication Date
KR960027223A true KR960027223A (en) 1996-07-22
KR0156756B1 KR0156756B1 (en) 1998-12-15

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