KR900004072A - Inverter overcurrent protection method and circuit - Google Patents

Inverter overcurrent protection method and circuit Download PDF

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Publication number
KR900004072A
KR900004072A KR1019880011214A KR880011214A KR900004072A KR 900004072 A KR900004072 A KR 900004072A KR 1019880011214 A KR1019880011214 A KR 1019880011214A KR 880011214 A KR880011214 A KR 880011214A KR 900004072 A KR900004072 A KR 900004072A
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KR
South Korea
Prior art keywords
phase
inverter
power
current
unit
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KR1019880011214A
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Korean (ko)
Inventor
이승봉
Original Assignee
안시환
삼성전자 주식회사
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Priority to KR1019880011214A priority Critical patent/KR900004072A/en
Publication of KR900004072A publication Critical patent/KR900004072A/en

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  • Control Of Multiple Motors (AREA)
  • Inverter Devices (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

내용 없음No content

Description

인버터 과전류 보호방법 및 회로Inverter overcurrent protection method and circuit

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

제1도는 본 발명의 회로도.1 is a circuit diagram of the present invention.

제2도는 본 발명의 블럭도.2 is a block diagram of the present invention.

제4도는 제2도중 상선택부(70) 및 정전류원(80), 비교부(90), 표시부(100)에 대한 일실시예의 구체회로도.4 is a detailed circuit diagram of an embodiment of a phase selector 70, a constant current source 80, a comparator 90, and a display unit 100 of FIG. 2.

Claims (2)

유도전동기 구동장치를 제어처리 하기 위한 제어부(60)와, 3상 교류전원을 입력하여 정류함으로서 직류 전원으로 변환하는 정류부(10)와, 상기 정류부(10)의 출력인 직류전원을 상기 제어부(60)의 제어에 따라 작동되어 원하는 주파수의 3상 교류전원으로 변환하는 인버터(20)와, 상기 인버터(20)의 출력인 3상 교류전원을 입력하여 상기 3상 교류전원의 주파수에 다르는 운전속도로 작동하는 유도전동기(30)와, 상기 정류부(10)의 출력인 직류전원의 전류량을 감지한 다음 감지되어진 전류량이 일정레벨 이상인가에 따라 논리상태가 다른 제1전류검출 신호를 발생하여 상기 제어부(60)로 출력하는 제1전류검출부(40)와, 상기 인버터(20)의 출력인 3상 교류전원의 전류량을 감지한 다음 감지되어진 전류량이 일정레벨 이상인가에 따라 논리상태가 다른 제2전류검출 신호를 발생하여 상기 제어부(60)로 출력하는 제2전류검출부(50)를 구비한 유도전동기 구동장치의 인버터와 전류보호 방법에 있어서, 인버터(20)와 유도전동기(30)간의 3상선로중 2상선로씩 선택하여 단선 또는 단락상태를 검사하여 단선 또는 단락시 단선 또는 단락되었음을 표시하고 상기 인버터(20)의 오프상태로 계속 유지하게 하며 단선 또는 단락되지 않았을시 인버터(20)를 작동하게 하는 과정으로 이루어짐을 특징으로 하는 방법.The control unit 60 for controlling the induction motor driving device, the rectifying unit 10 for converting into a DC power supply by rectifying by inputting a three-phase AC power, and the DC power supply output of the rectifying unit 10 to the control unit 60. Operating speed according to the control of the inverter 20 and converting the three-phase AC power of the desired frequency and the three-phase AC power output of the inverter 20 to the frequency of the three-phase AC power After detecting the amount of current of the induction motor 30 and the DC power source output of the rectifying unit 10 and generates a first current detection signal having a different logic state depending on whether the detected current amount is above a certain level, the control unit The first current detection unit 40 outputs to 60 and the second current of which the logic state is different depending on whether the detected current amount is above a predetermined level after sensing the current amount of the three-phase AC power source output from the inverter 20. detection In the inverter and the current protection method of the induction motor drive device having a second current detection unit 50 for generating a call and output to the control unit 60, in the three-phase line between the inverter 20 and the induction motor 30 By checking the disconnection or short-circuit state by selecting two-phase lines, it indicates that the disconnection or short-circuit is indicated, and keeps it in the off state of the inverter 20 and operates the inverter 20 when disconnection or short-circuit is not performed. Characterized by consisting of a process. 유도전동기 구동장치를 제어처리하기 위한 제어부(60)와, 3상 교류전원을 입력하여 정류함으로서 직류전원으로 변환하는 정류부(10)와, 상기 정류부(10)의 출력인 직류전원을 상기 제어부(60)의 제어에 따라 작동되어 원하는 주파수의 3상 교류전원으로 변환하는 인버터(20)와, 상기 인버터(20)의 출력인 3상 교류전원을 입력하여 상기 3상 교류전원의 주파수에 다르는 운전속도로 작동하는 유도전동기(30)와, 상기 정류부(10)의 출력인 직류전원의 전류량을 감지한 다음 감지되어진 전류량이 일정레벨 이상인가에 따라 논리상태가 다른 제1전류검출 신호를 발생하여 상기 제어부(60)로 출력하는 제1전류검출부(40)와, 상기 인버터(20)의 출력인 3상 교류전원의 전류량을 감지한 다음 감지되어진 전류량이 일정레벨 이상인가에 따라 논리상태가 다른 제2전류검출 신호를 발생하여 상기 제어부(60)로 출력하는 제2전류검출부(50)를 구비한 유도전동기 구동장치의 있어서, 상기 제어부(60)의 제어하에 상기 인버터(20)와 유도전동기(30) 간의 3상 선로중 임의의 두상선로를 선택하는 상선택부(70)와, 일정레벨의 정정류신호를 발생하는 정전류원(80)과, 상기 상선택부(70)에 의해 선택되어진 상기 인버터(20)와 유도전동기(30) 간에 2상 선로에 상기 정전류원(80)의 출력인 정전류 신호를 인가하여 전압상태를 비교함으로서 상기 유도전동기(30)의 단락 또는 단선상태에 대한 선로상태 신호를 발생하는 비교부(90)와, 상기 비교부(90)의 선로상태 신호를 입력하여 선로의 단락 및 단선상태를 표시하고 상기 선로상태 신호를 상기 제어부(60)로 전송하는 표시부(100)로 구성됨을 특징으로 하는 과전류 보호회로.The control unit 60 for controlling and controlling the induction motor driving device, the rectifying unit 10 for converting to a DC power by rectifying by inputting a three-phase AC power, and the DC power that is the output of the rectifying unit 10 to the control unit 60. Operating speed according to the control of the inverter 20 and converting the three-phase AC power of the desired frequency and the three-phase AC power output of the inverter 20 to the frequency of the three-phase AC power After detecting the amount of current of the induction motor 30 and the DC power source output of the rectifying unit 10 and generates a first current detection signal having a different logic state depending on whether the detected current amount is above a certain level, the control unit The first current detection unit 40 outputs to 60 and the second current of which the logic state is different depending on whether the detected current amount is above a predetermined level after sensing the current amount of the three-phase AC power source output from the inverter 20. Detection scene In the induction motor drive device having a second current detection unit 50 for generating and outputting to the control unit 60, the three-phase between the inverter 20 and the induction motor 30 under the control of the control unit 60 Phase selection unit 70 for selecting an arbitrary two-phase line of the line, a constant current source 80 for generating a constant level rectified signal, and the inverter 20 selected by the phase selection unit 70 and induction A comparator for generating a line state signal for a short circuit or a disconnected state of the induction motor 30 by comparing a voltage state by applying a constant current signal that is an output of the constant current source 80 to a two-phase line between the motors 30 ( 90) and an overcurrent, comprising: a display unit 100 for inputting a line state signal of the comparator 90 to indicate a short circuit and disconnection state of the line and transmitting the line state signal to the controller 60; Protection circuit. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019880011214A 1988-08-31 1988-08-31 Inverter overcurrent protection method and circuit KR900004072A (en)

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Application Number Priority Date Filing Date Title
KR1019880011214A KR900004072A (en) 1988-08-31 1988-08-31 Inverter overcurrent protection method and circuit

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Application Number Priority Date Filing Date Title
KR1019880011214A KR900004072A (en) 1988-08-31 1988-08-31 Inverter overcurrent protection method and circuit

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100325672B1 (en) * 1997-09-10 2002-06-20 니시무로 타이죠 Inverter device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100325672B1 (en) * 1997-09-10 2002-06-20 니시무로 타이죠 Inverter device

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