KR830001749A - Inverter circuit protection system for AC motor drive - Google Patents

Inverter circuit protection system for AC motor drive

Info

Publication number
KR830001749A
KR830001749A KR1019790003901A KR790003901A KR830001749A KR 830001749 A KR830001749 A KR 830001749A KR 1019790003901 A KR1019790003901 A KR 1019790003901A KR 790003901 A KR790003901 A KR 790003901A KR 830001749 A KR830001749 A KR 830001749A
Authority
KR
South Korea
Prior art keywords
inverter
circuit
protection system
inverter circuit
overcurrent
Prior art date
Application number
KR1019790003901A
Other languages
Korean (ko)
Other versions
KR830001185B1 (en
Inventor
시게끼 가와다
히로시 이시다
Original Assignee
이나바 세이우에 몽
후지쓰후아낙크 가부시끼 가이샤
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 이나바 세이우에 몽, 후지쓰후아낙크 가부시끼 가이샤 filed Critical 이나바 세이우에 몽
Priority to KR1019790003901A priority Critical patent/KR830001185B1/en
Publication of KR830001749A publication Critical patent/KR830001749A/en
Application granted granted Critical
Publication of KR830001185B1 publication Critical patent/KR830001185B1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)
  • Protection Of Static Devices (AREA)

Abstract

내용 없음No content

Description

교류 전동기 구동용 인버어터 회로의 보호 시스템Inverter circuit protection system for AC motor drive

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음This content is subject to disclosure, so the full text is not included.

제1도는 본 발명의 1실시예를 나타낸 기능블록도. 제2도는 과전류 보호장치의 구체적인 회로도. 제3도는 각 부분의 파형을 나타낸 파형도.1 is a functional block diagram showing an embodiment of the present invention. 2 is a specific circuit diagram of the overcurrent protection device. Figure 3 is a waveform diagram showing the waveforms of each part.

Claims (7)

트랜지스터의 스위칭작용에 의하여 직류를 장방형 파형의 다상 교류로 변환시키기 위한 인버어터회로와 인버어터 회로의 출력주파수를 규정치로 조정하기 위한 인버어터 구동회로를 포함하며, 교류전동기가 인버어터 회로에 의해 공급된 교류에 의해 회전되는 속도제어 시스템에 있어서 인버어터 회로 출력측을 통하여 흐르는 전류를 검출하는 과전류 검출수단, 상기 과전류 검출단이 과전류를 검출할 때 상기 과전류 검출수단으로부터의 신호에 응답한 인버어터 구동회로의 동작을 저지하는 수단 및 정해진 기간에 인버어터 구동회로의 동작을 복구시키기 위한 수단으로 구성되며, 교류전동기 내의 과부하에 기인하여 트랜지스터를 통하는 전류가 소정치에 달할 때 인버어터 회로의 동작이 저지되며, 정해진 기간이 경과한후 복귀되도록 개선된 것이 특징인 교류 전동기 구동용 인버어터 회로의 보호 시스템.It includes an inverter circuit for converting DC into a rectangular waveform polyphase AC by the switching action of a transistor and an inverter drive circuit for adjusting the output frequency of the inverter circuit to a specified value, and an AC motor is supplied by the inverter circuit. Overcurrent detection means for detecting a current flowing through an output side of an inverter circuit in a speed control system rotated by an alternating current, and an inverter driving circuit responsive to a signal from the overcurrent detection means when the overcurrent detection stage detects an overcurrent It consists of a means for preventing the operation of the inverter and a means for restoring the operation of the inverter driving circuit for a predetermined period.When the current through the transistor reaches a predetermined value due to an overload in the AC motor, the operation of the inverter circuit is blocked. , The protection system of the inverter circuit for driving an AC motor, which is improved to recover after a specified period of time. 과전류 검출수단이 과전류치 설정장치와 상기 과전류치 설정장치에 의해 발생된 출력전압과 인버어터회로의 출력측을 통해 흐르는 전류에 비례한 전압을 비교하기 위한 비교기를 포함하는 특허 청구의 범위 1항에 따른 보호 시스템.According to claim 1, the overcurrent detection means comprises an overcurrent value setting device and a comparator for comparing the output voltage generated by the overcurrent value setting device and a voltage proportional to the current flowing through the output side of the inverter circuit. Protection system. 과전류 검출수단이 인버어터 회로의 각 출력상에 구비된 특허 청구의 범위 2항에 따른 보호 시스템.A protection system according to claim 2, wherein overcurrent detection means is provided on each output of the inverter circuit. 과전류치 설정장치에 의해 개발된 전압이 변할 수 있는 특허 청구의 범위 3항에 따른 보호 시스템.A protection system according to claim 3 in which the voltage developed by the overcurrent value setting device can be changed. 일정한 기간에 인버어터 구동회로의 동작을 복귀시키기 위한 수단이 플립플롭 회로로 구성되며, 저지 상태일 때 인버어터 구동회로가 상기 펄스 발생기에 의해 발생된 펄스에 의해 설정된 상기 플립플롭 회로로부터의 출력신호에 의해 동작상태로 복구하는 특허청구의 범위 1항에 따른 보호 시스템.The means for restoring the operation of the inverter driving circuit in a certain period is composed of a flip-flop circuit, and when in the stopped state, the inverter driving circuit is an output signal from the flip-flop circuit set by a pulse generated by the pulse generator. A protection system according to Clause 1 of the scope of the patent claim, which is restored to its operating state by 펄스 발생기의 발진 주파수가 교류 전동기 구동용 전원의 발진 주파수보다 높은 특허 청구의 범위 5항에 따른 보호 시스템.The protection system according to claim 5, wherein the oscillation frequency of the pulse generator is higher than the oscillation frequency of the power supply for driving an AC motor. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is disclosed according to the contents of the initial application.
KR1019790003901A 1979-11-08 1979-11-08 Protection method of inverter circuit for AC motor drive KR830001185B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019790003901A KR830001185B1 (en) 1979-11-08 1979-11-08 Protection method of inverter circuit for AC motor drive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019790003901A KR830001185B1 (en) 1979-11-08 1979-11-08 Protection method of inverter circuit for AC motor drive

Publications (2)

Publication Number Publication Date
KR830001749A true KR830001749A (en) 1983-05-18
KR830001185B1 KR830001185B1 (en) 1983-06-20

Family

ID=19213476

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019790003901A KR830001185B1 (en) 1979-11-08 1979-11-08 Protection method of inverter circuit for AC motor drive

Country Status (1)

Country Link
KR (1) KR830001185B1 (en)

Also Published As

Publication number Publication date
KR830001185B1 (en) 1983-06-20

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