KR100593850B1 - 전원 감시수단을 구비한 크레인 과부하 방지장치 - Google Patents
전원 감시수단을 구비한 크레인 과부하 방지장치 Download PDFInfo
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- KR100593850B1 KR100593850B1 KR1020040055774A KR20040055774A KR100593850B1 KR 100593850 B1 KR100593850 B1 KR 100593850B1 KR 1020040055774 A KR1020040055774 A KR 1020040055774A KR 20040055774 A KR20040055774 A KR 20040055774A KR 100593850 B1 KR100593850 B1 KR 100593850B1
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- KR
- South Korea
- Prior art keywords
- overload
- phase
- hoisting motor
- alarm
- voltage
- Prior art date
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- 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
- H02H7/08—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 dynamo-electric motors
- H02H7/085—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 dynamo-electric motors against excessive load
- H02H7/0856—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 dynamo-electric motors against excessive load characterised by the protection measure taken
- H02H7/0857—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 dynamo-electric motors against excessive load characterised by the protection measure taken by lowering the mechanical load of the motor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
- H02H3/34—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors of a three-phase system
-
- 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
- H02H7/08—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 dynamo-electric motors
- H02H7/085—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 dynamo-electric motors against excessive load
- H02H7/0853—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 dynamo-electric motors against excessive load specially adapted for motors rotating in both directions
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/20—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits characterised by logic function, e.g. AND, OR, NOR, NOT circuits
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Protection Of Generators And Motors (AREA)
- Control And Safety Of Cranes (AREA)
Abstract
Description
Claims (5)
- R,S,T 3상 선로가 결선되는 적어도 하나 이상의 권상모터를 구비한 크레인에 설치되는 과부하 방지장치에 있어서,상기 3상 선로의 전압을 검출하는 전압감지부;상기 권상모터의 R,S,T상 입력라인 중 어느 하나에 결합되어 권상모터에 흐르는 전류를 검출하는 전류센서;상기 3상 선로에 개재되어 정회전 및 역회전을 위한 전기신호를 상기 권상모터에 선택적으로 전달하는 스위칭수단;경보신호 인가시 선택적으로 작동되는 경보수단;상기 전류감지부의 검출치를 기준치와 비교하여 과부하 상태를 판별하는 비교부;상기 전압감지부의 검출치가 허용 범위내에서 설정값으로부터 벗어난 경우 그 검출치에 상응하도록 상기 비교부의 과부하 판단 기준치를 변경시키는 보상부;상기 전압감지부의 검출치가 허용 범위를 벗어난 경우 혹은 과부하시 상기 스위칭수단에 구동신호를 출력하여 권상모터의 회전방향을 전환하거나 정지시키는 한편, 상기 경보수단에 경보신호를 출력하는 작동제어부;를 포함하는 것을 특징으로 하는 과부하 방지장치.
- 제 1항에 있어서,역상과 결상을 감지하도록 상기 3상 선로에 연결되는 상체크부;를 더 포함하는 과부하 방지장치.
- 제 2항에 있어서, 상기 상체크부는,일측 입력단자에 각각 R상, S상, T상 선로가 연결되고, 타측 입력단자와 인접 게이트의 출력단자가 연쇄적으로 연결되어 있는 3개의 NAND 게이트를 구비하는 것을 특징으로 하는 과부하 방지장치.
- 제 1항에 있어서, 상기 경보수단은,경보신호에 상응하는 경보음을 발생시키는 경보부저; 및상기 권상모터에 인가되는 전원의 상태나 과부하 여부를 시각적으로 구분하여 표출하는 표시부;를 구비하는 것을 특징으로 하는 과부하 방지장치.
- 제 1항에 있어서,상기 전류센서의 출력레벨을 적정값으로 조정하는 레벨조정부; 및상기 레벨조정부를 거친 신호를 정류하는 정류부;를 구비하고,상기 비교부는,상기 정류부에 의해 정류된 아날로그 신호의 피크치들에 대한 평균값을 산출하여 이를 기준치와 비교하는 것을 특징으로 하는 과부하 방지장치.
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KR1020040055774A KR100593850B1 (ko) | 2004-07-16 | 2004-07-16 | 전원 감시수단을 구비한 크레인 과부하 방지장치 |
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KR1020040055774A KR100593850B1 (ko) | 2004-07-16 | 2004-07-16 | 전원 감시수단을 구비한 크레인 과부하 방지장치 |
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KR20060006662A KR20060006662A (ko) | 2006-01-19 |
KR100593850B1 true KR100593850B1 (ko) | 2006-06-28 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011056696A2 (en) * | 2009-10-28 | 2011-05-12 | Real Rigging Solutions, Llc | Fault monitoring system for electric single or poly-phase chain hoist motors |
KR20200117467A (ko) * | 2019-04-04 | 2020-10-14 | 안상기 | 호이스트의 과부하 및 과전류 보호장치 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102025789B1 (ko) * | 2017-06-12 | 2019-09-25 | 주식회사 쎄슬프라이머스 | 부하 보호 및 고장 방지 기능을 갖는 스마트 팜 시스템 및 그 제공방법 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR19990055536A (ko) * | 1997-12-27 | 1999-07-15 | 최진호 | 모터의 전류감지 장치 |
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- 2004-07-16 KR KR1020040055774A patent/KR100593850B1/ko active IP Right Grant
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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KR19990055536A (ko) * | 1997-12-27 | 1999-07-15 | 최진호 | 모터의 전류감지 장치 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011056696A2 (en) * | 2009-10-28 | 2011-05-12 | Real Rigging Solutions, Llc | Fault monitoring system for electric single or poly-phase chain hoist motors |
WO2011056696A3 (en) * | 2009-10-28 | 2011-09-15 | Real Rigging Solutions, Llc | Fault monitoring system for electric single or poly-phase chain hoist motors |
KR20200117467A (ko) * | 2019-04-04 | 2020-10-14 | 안상기 | 호이스트의 과부하 및 과전류 보호장치 |
KR102228007B1 (ko) * | 2019-04-04 | 2021-03-15 | 안상기 | 호이스트의 과부하 및 과전류 보호장치 |
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Publication number | Publication date |
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KR20060006662A (ko) | 2006-01-19 |
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