KR940004927A - Overload protection device of general purpose inverter - Google Patents

Overload protection device of general purpose inverter Download PDF

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Publication number
KR940004927A
KR940004927A KR1019920014250A KR920014250A KR940004927A KR 940004927 A KR940004927 A KR 940004927A KR 1019920014250 A KR1019920014250 A KR 1019920014250A KR 920014250 A KR920014250 A KR 920014250A KR 940004927 A KR940004927 A KR 940004927A
Authority
KR
South Korea
Prior art keywords
current
rated current
rated
purpose inverter
general
Prior art date
Application number
KR1019920014250A
Other languages
Korean (ko)
Other versions
KR950002647B1 (en
Inventor
신우석
Original Assignee
이헌조
주식회사 금성사
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.)
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Publication date
Application filed by 이헌조, 주식회사 금성사 filed Critical 이헌조
Priority to KR92014250A priority Critical patent/KR950002647B1/en
Publication of KR940004927A publication Critical patent/KR940004927A/en
Application granted granted Critical
Publication of KR950002647B1 publication Critical patent/KR950002647B1/en

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Classifications

    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)
  • Control Of Ac Motors In General (AREA)
  • Protection Of Static Devices (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

본 발명은 범용 인버터에서부하측에 흐르는 전류를 감시하고 감시결과를 정격전류와 비교, 판단하여 과부하 검출시 부하전원을 차단 제어하는 범용 인버터의 과부하 보호장치에 관한 것으로, 종래 기술에 의하면, 범용 인버터에서 정격전류가 4A로 되어 있고 2A정격의 전동기를 사용한다면 과부하 반한시 특성을 수행시(150% 1분간)6A(4×1.5)의 전류가 1분간 전동기에 흐르게 되어 정격의 300%를 초과하는 과전류가 계속 흐르게 되므로 전동기 손상이 초래되는 문제점을 해결하기 위한 것이다.The present invention relates to an overload protection device of a general-purpose inverter that monitors the current flowing to the load side in the general-purpose inverter and compares and judges the monitoring result with the rated current to control the load power when the overload is detected. If the rated current is 4A and a 2A rated motor is used, the current of 6A (4 × 1.5) flows to the motor for 1 minute when the overload inverse time characteristic is performed (150% for 1 minute) and overcurrent exceeding 300% of the rating This is to solve the problem that the motor damage is caused to continue to flow.

본 발명은 원하는 정격전류를 자유롭게 설정하고, 설정된 정격전류에 따라 각각 다른 룩-업 테이블을 참조하여 과부하 판단을 수행하므로서 과전류에 의한 부하손상을 방지할수 있도록 한 것으로, 범용 인버터에 적용한다.The present invention is to freely set the desired rated current, and to prevent load damage due to overcurrent by performing overload determination by referring to different look-up tables according to the set rated current, it is applied to a general-purpose inverter.

Description

범용 인버터의 과부하 보호장치Overload protection device of general purpose inverter

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

제4도는 본 발명에 의한 범용 인버터의 과부하 보호장치 회로도,4 is a circuit diagram of an overload protection device of a general-purpose inverter according to the present invention,

제5도는 본 발명에 의한 범용 인버터의 정격 전 류/구파수 표시과정의 플로우챠트.5 is a flowchart of a rated current / wave number display process of a general-purpose inverter according to the present invention.

Claims (2)

부하전류를 검출하는 변류기(5)와, 상기 검출전류를 직류로 변환시키는 정류/평활부(12)와, 부하의 정격전류를 설정해주고 설정된 정격 전류와 상기 정류/평활부 (12)의 검출전류를 비교하는 정격 비교부(13)와, 상기 정격 비교부(13)의 설정된 정격 전류 레벨을 출력해주는 버퍼(14)와, 표시값의 주파수 또는 정격전류 선택을 위한 스위치부(15)와, 상기 스위치부(15) 조작에 대응하여 주파수 또는 정격전류의 표시제어 및 정격전류의 비교 검출결과에 데응하는 과부하 판단제어를 수행하는 마이컴(16)과, 상기 마이컴(16)의 제어를 받아 주파수 또는 정격전류가 표시되는 표시부(17)로 구성된 범용 인버터의 과부하 보호장티.A current transformer 5 for detecting a load current, a rectifying / smoothing portion 12 for converting the detected current into a direct current, a rated current of a load, and a set rated current and a detection current of the rectifying / smoothing portion 12 A rating comparator 13 for comparing the voltage, a buffer 14 for outputting a set rated current level of the rating comparator 13, a switch part 15 for selecting a frequency or a rated current of a display value, and In response to the operation of the switch unit 15, the microcomputer 16 performs overload determination control corresponding to the display control of the frequency or rated current and the comparison detection result of the rated current, and under the control of the microcomputer 16, An overload protection device of a general-purpose inverter composed of a display unit 17 on which current is displayed. 제1항에 있어서, 상기 정격 비교부(12)는, 정격전류 설정용 가변저항(V1)과, 설정된 정격 전류와 검출전류 를 비교하는 비교기(COM1)로 구성된 범용 인버터의 과부하 보호장치.The overload protection device of a general-purpose inverter according to claim 1, wherein the rated comparator (12) comprises a variable resistor (V1) for setting a rated current and a comparator (COM1) for comparing the set rated current with a detected current. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR92014250A 1992-08-08 1992-08-08 Overload protecting circuit KR950002647B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR92014250A KR950002647B1 (en) 1992-08-08 1992-08-08 Overload protecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR92014250A KR950002647B1 (en) 1992-08-08 1992-08-08 Overload protecting circuit

Publications (2)

Publication Number Publication Date
KR940004927A true KR940004927A (en) 1994-03-16
KR950002647B1 KR950002647B1 (en) 1995-03-23

Family

ID=19337679

Family Applications (1)

Application Number Title Priority Date Filing Date
KR92014250A KR950002647B1 (en) 1992-08-08 1992-08-08 Overload protecting circuit

Country Status (1)

Country Link
KR (1) KR950002647B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19980043923A (en) * 1996-12-05 1998-09-05 구자홍 Input voltage detection protection circuit of inverter circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19980043923A (en) * 1996-12-05 1998-09-05 구자홍 Input voltage detection protection circuit of inverter circuit

Also Published As

Publication number Publication date
KR950002647B1 (en) 1995-03-23

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