KR950026091A - Inverter voltage and current protection circuit - Google Patents

Inverter voltage and current protection circuit Download PDF

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Publication number
KR950026091A
KR950026091A KR1019940002084A KR19940002084A KR950026091A KR 950026091 A KR950026091 A KR 950026091A KR 1019940002084 A KR1019940002084 A KR 1019940002084A KR 19940002084 A KR19940002084 A KR 19940002084A KR 950026091 A KR950026091 A KR 950026091A
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KR
South Korea
Prior art keywords
output
circuit
detection
current
protection circuit
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KR1019940002084A
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Korean (ko)
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KR970000878B1 (en
Inventor
최재영
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이헌조
엘지전자 주식회사
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Publication of KR950026091A publication Critical patent/KR950026091A/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
    • H02H7/122—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 for inverters, i.e. dc/ac converters
    • H02H7/1227—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 for inverters, i.e. dc/ac converters responsive to abnormalities in the output circuit, e.g. short circuit
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode

Abstract

본 발명은 인버터의 과전류 및 과전압 검출 보호회로에 관한 것으로서, 특히 과전류 또는 과전압으 검출하여 회로 출력을 차단시킨후, 마이크로 프로세서에 인식하는 전압과 보호 회로측에서 인식하는 전압의 차이에 의해 발생할 수 있는 보호 회로의 무력화 현상을 방지할 수 있도록 한 인버터의 과전류 및 과전압 검출 보호회로에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an overcurrent and overvoltage detection protection circuit of an inverter. In particular, after detecting an overcurrent or an overvoltage to cut off a circuit output, the present invention may cause a difference between a voltage recognized by a microprocessor and a voltage recognized by a protection circuit. The present invention relates to an overcurrent and overvoltage detection protection circuit of an inverter capable of preventing the protection circuit from being neutralized.

종래의 인버터의 이상 전압 및 전류 보호회로에 의하면 마이크로 프로세서(15)가 이상 상태를 인식할 수 없는 공백 상태가 존재하게 되고, 이러한 공백 상태의 존재는 이상 전압 및 전류 보호 동작에 신뢰성을 보장할 수 없게되는 치명적인 문제점을 갖게되며, 이로 인하여 회로 소자의 보호 동작에 신뢰성이 결여되는 문제점과, 공백 기간에 발생한 이상 전압, 이상 전류에 의해서 회로 소자의 손상이나 수명 단축이 초래되는 문제점이 있다.According to the abnormal voltage and current protection circuit of the conventional inverter, there is an empty state in which the microprocessor 15 cannot recognize an abnormal state, and the existence of such an empty state can ensure reliability in the abnormal voltage and current protection operation. There is a fatal problem that there is no, there is a problem that the protection operation of the circuit element lacks reliability, and there is a problem that damage or shorten the life of the circuit element caused by the abnormal voltage and the abnormal current generated in the blank period.

본 발명은 상기한 바와같은 종래 기술의 문제점을 해소하고자, 과전압이나 과전류 및 부족 전압과 같은 이상전압, 전류 검출시 이를 마이크로 프로세서(15)에 제공하는 신호를 지연수단(18)으로 지연시키고, 이 지연된 신호와 재기동을 위한 리세트 신호를 이용해서 검출 및 보호회로의 재기동 타이밍을 펄스 발생수단(20)으로 제어함으로써, 상기한 바와같은 이상 전압 및 전류 검출과 차단 제어의 공백 상태 발생을 방지할 수 있고, 고도의 신뢰성을 갖는 인버터의 이상 전압 및 전류 보호회로이다.The present invention, in order to solve the problems of the prior art as described above, to delay the signal provided to the microprocessor 15 when the abnormal voltage, such as overvoltage or overcurrent and undervoltage, the current is detected by the delay means 18, By controlling the restart timing of the detection and protection circuit using the delayed signal and the reset signal for restarting, the pulse generating means 20 can prevent the occurrence of an empty state of abnormal voltage and current detection and cutoff control as described above. It is an abnormal voltage and current protection circuit of an inverter with high reliability.

Description

인버터의 이상 전압 및 전류 보호회로Inverter voltage and current protection circuit

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

제4도는 본 발명의 인버터의 이상 전압 및 전류 보호회로의 블록 구성도.4 is a block diagram of an abnormal voltage and current protection circuit of the inverter of the present invention.

제5도는 본 발명에서 지연수단의 실시예를 나타낸 회로도.5 is a circuit diagram showing an embodiment of a delay means in the present invention.

제6도는 본 발명에서 펄스 발생수단의 실시예를 나타낸 회로도.6 is a circuit diagram showing an embodiment of the pulse generating means in the present invention.

Claims (3)

교류 전원을 직류로 정류하는 정류부(1)와, 상기 정류부(1)의 출력을 평활하는 평활부(2)와, 상기 평활부(2)의 출력 전류를 검출하는 전류 검출부(3)와, 상기 평활부(2)의 출력을 스위칭하여 부하(5)에 공급되는 전력을 제어하는 출력부(4)와, 상기 평활부(2)의 평활 전압 출력 및 전류 검출부(3)의 검출 전류를 이용해서 과전압, 과전류, 부족 전압을 검출하고, 검출 결과로 회로 소자의 보호 동작을 실행하는 검출 및 보호 회로(6)와, 상기 검출 및 보호 회로(6)의 출력을 입력받아, 제어회로(8)의 제어를 받아 출력부(4)를 구동시키는 구동회로(7)와, 상기 검출 및 보호회로(6)의 과전압, 과전류, 부족전압 검출 신호를 입력받아 이상 상태로부터 회로 소자를 보호할 수 있도록 구동부(7)를 제어하는 제어회로(8)로 구성된 인버터 회로에 있어서, 상기 전류 검출부(3)에서 검출된 전류를 입력받아 과전류를 검출하는 과전류 검출회로(9)와, 상기 평활부(2)에서 출력된 전압을 입력받아 과전압을 검출하는 과전압 검출회로(10)와, 상기 평활부(2)에서 출력된 전압을 입력받아 부족 전압을 검출하는 부족 전압 검출회로(11)와, 상기 과전류 검출회로(9)의 출력을 래치하는 플립플롭(12)과, 사익 과전압 검출회로(10)의 출력을 래치하는 플립플롭(13)과, 상기 플립플롭(12)(13)의 출력 및 부족 전압 검출회로(11)의 출력을 논리곱하는 앤드 게이트(14)와, 상기 플립플롭(12)(13)의 출력을 이상 상태 검출 신호로 입력받고, 또한 상기 앤드 게이트(14)의 출력을 인터럽트 신호(INT)로 입력받아 이상 상태에서의 회로 보호 동작을 실행하는 마이크로 프로세서(15)와, 상기 마이크로 프로세서(15) 및 플립플롭(13)-을 초기화시켜 주기 위한 리세트 신호를 발생하는 리세트 회로(16)와, 상기 리세트 회로(16)를 동작시켜 주는 리세트 스위치(17)와, 상기 앤드 게이트(14)로부터 마이크로 프로세서(15)로 공급되는 검출 신호(c)를 마이크로 프로세서(15)의 이상 상태 처리가 완료되는 시간 동안 지연시키는 지연수단(18)과, 상기 지연수단(18)의 지연된 신호와 상기 리세트 회로(16)의 출력 신호를 논리곱하는 게이트수단(19)과, 상기 게이트수단(19)의 출력을 이용해서, 상기 플립플롭(12)(13)이 재기동될 수 있는 신호를 일정한 시간 동안 발생시켜 공급해 주는 펄스 발생수단(20)으로 구성된 것을 특징으로 하는 인버터의 이상 전압 및 전류 보호회로.A rectifier 1 for rectifying AC power to DC, a smoothing part 2 for smoothing the output of the rectifying part 1, a current detecting part 3 for detecting an output current of the smoothing part 2, and The output part 4 which controls the power supplied to the load 5 by switching the output of the smoothing part 2, and the smoothing voltage output of the smoothing part 2, and the detected current of the current detection part 3 are used, The detection and protection circuit 6 which detects overvoltage, overcurrent and undervoltage, and performs protection operation of the circuit element as a result of detection, and receives the output of the detection and protection circuit 6, A driving circuit 7 for driving the output unit 4 under control, and an overvoltage, overcurrent, and undervoltage detection signal of the detection and protection circuit 6 to be protected so that the circuit element can be protected from an abnormal state. In the inverter circuit composed of a control circuit (8) for controlling 7), the current detecting section (3) An overcurrent detection circuit 9 for receiving the detected current and detecting the overcurrent, an overvoltage detection circuit 10 for receiving the voltage output from the smoothing unit 2 and detecting the overvoltage, and the smoothing unit 2 The undervoltage detection circuit 11 for receiving the output voltage and detecting the undervoltage, the flip-flop 12 for latching the output of the overcurrent detection circuit 9, and the output of the sound overvoltage detection circuit 10 are latched. The flip-flop 13, the AND gate 14 which ANDs the output of the flip-flop 12, 13, and the output of the undervoltage detection circuit 11, and the output of the flip-flop 12, 13. Is inputted as an abnormal state detection signal, and the output of the AND gate 14 is received as an interrupt signal INT to execute a circuit protection operation in an abnormal state, and the microprocessor 15 And a reset signal for initializing the flip-flop 13 A generated reset circuit 16, a reset switch 17 for operating the reset circuit 16, and a detection signal c supplied from the AND gate 14 to the microprocessor 15; Delay means 18 for delaying the abnormal state processing of the microprocessor 15 during completion, and gate means 19 for ANDing the delayed signal of the delay means 18 and the output signal of the reset circuit 16. ) And pulse generating means 20 for generating and supplying a signal for restarting the flip-flop 12 and 13 for a predetermined time using the output of the gate means 19. Inverter over voltage and current protection circuit. 제1항에 있어서, 상기 지연수단(18)은 클록(CLOCK)을 입력으로 하여 카운트를 실행하는 카운터(21)와, 상기 카운터(21)출력값 중에서 지연에 필요한 시간에 해당하는 클록 카운트 출력을 반전시키는 반전기(23)와, 상기 반전기(23)의 출력을 제어 신호로 입력받아 상기 카운터(21)에 공급되는 클록(CLOCK)을 공급 또는 차단 제어하는 앤드 게이트(22)로 구성된 것을 특징으로 하는 인버터의 이상 전압 및 전류 보호회로.The counter 21 according to claim 1, wherein the delay means 18 inverts a counter 21 which executes a count by inputting a clock CLOCK and a clock count output corresponding to a time required for delay among the counter 21 output values. And an end gate 22 for supplying or blocking the clock CLOCK supplied to the counter 21 by receiving the output of the inverter 23 as a control signal. Inverter over voltage and current protection circuit. 제1항에 있어서, 상기 펄스 발생수단(20)은, 게이트 수단(19)의 출력을 트리거 입력으로 하여 소정 시간동안 액티브되는 단안정 멀티바이브레이터(24)와, 상기 단안정 멀티바이브레이터(24)의 펄스 출력시간을 설정하는 저항(R) 및 콘덴서(C)로 구성된 것을 특징으로 하는 인버터의 이상 전압 및 전류 보호회로.2. The monostable multivibrator 24 according to claim 1, wherein the pulse generating means 20 is a monostable multivibrator 24 that is active for a predetermined time by using the output of the gate means 19 as a trigger input. An abnormal voltage and current protection circuit of an inverter comprising a resistor (R) and a capacitor (C) for setting a pulse output time. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940002084A 1994-02-04 1994-02-04 Voltage and current protection circuit of inverter KR970000878B1 (en)

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Application Number Priority Date Filing Date Title
KR1019940002084A KR970000878B1 (en) 1994-02-04 1994-02-04 Voltage and current protection circuit of inverter

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Application Number Priority Date Filing Date Title
KR1019940002084A KR970000878B1 (en) 1994-02-04 1994-02-04 Voltage and current protection circuit of inverter

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KR950026091A true KR950026091A (en) 1995-09-18
KR970000878B1 KR970000878B1 (en) 1997-01-20

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100295592B1 (en) * 1998-06-12 2001-08-07 구자홍 Intelligent power module with fault reset circuit
KR20030054578A (en) * 2001-12-26 2003-07-02 한국철도기술연구원 inverter control device use for electric train
WO2020105795A1 (en) * 2018-11-20 2020-05-28 엘지전자 주식회사 Motor control device, motor control system, and motor control method
CN113258764A (en) * 2021-06-22 2021-08-13 浙江大学 High-voltage driving circuit and power module
CN117439396A (en) * 2023-12-20 2024-01-23 杭州闪充聚能新能源有限公司 Wave-by-wave current limiting protection system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100392438B1 (en) * 2000-11-28 2003-07-22 윤여관 Apparatus for Elecric Motor Protection and Control
KR100689328B1 (en) * 2005-12-02 2007-03-08 엘에스산전 주식회사 Protection apparatus for inverter

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100295592B1 (en) * 1998-06-12 2001-08-07 구자홍 Intelligent power module with fault reset circuit
KR20030054578A (en) * 2001-12-26 2003-07-02 한국철도기술연구원 inverter control device use for electric train
WO2020105795A1 (en) * 2018-11-20 2020-05-28 엘지전자 주식회사 Motor control device, motor control system, and motor control method
US11831263B2 (en) 2018-11-20 2023-11-28 Lg Electronics Inc. Motor control device, motor control system, and motor control method
CN113258764A (en) * 2021-06-22 2021-08-13 浙江大学 High-voltage driving circuit and power module
CN117439396A (en) * 2023-12-20 2024-01-23 杭州闪充聚能新能源有限公司 Wave-by-wave current limiting protection system
CN117439396B (en) * 2023-12-20 2024-04-16 杭州闪充聚能新能源有限公司 Wave-by-wave current limiting protection system

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