CN100483143C - Magnet coil break detection circuit - Google Patents
Magnet coil break detection circuit Download PDFInfo
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- CN100483143C CN100483143C CNB2007100235079A CN200710023507A CN100483143C CN 100483143 C CN100483143 C CN 100483143C CN B2007100235079 A CNB2007100235079 A CN B2007100235079A CN 200710023507 A CN200710023507 A CN 200710023507A CN 100483143 C CN100483143 C CN 100483143C
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Abstract
The invention relates to a breakage check circuit of magnet coil, in particular to a breakage check circuit of a magnet coil in direct current, comprising a work power U1, a controller, diodes D1-D4, a check power U2, and a light coupler G1 as a signal output device, wherein one end of the magnet coil L is connected with the cathodes of the diodes D1, D2, and one end of the controller, another end of the magnet coil L is connected with the first input end of the light coupler G1 and the anode of the diode D1, while the second input of the light coupler G1 is connected with the cathodes of the work power U1 and the check power U2, the anode of the work power U1 is connected with another end of the controller, the anode of the check power U2 is connected with the anode of the diode D2, the diodes D3, D4 are serially connected, while the anode of the diode D3 is connected with the first input of the light coupler G1, and the cathode of the diode D4 is connected with the second input of the light coupler G1. The invention has the advantages in lower power consumption, high reliability and high practicality.
Description
Technical field
The present invention relates to the break detection circuit of the solenoid of a kind of break detection circuit of solenoid, particularly DC operation.
Background technology
Development along with the isolating switch technology, the isolating switch of communication type is day by day frequent, it is except the function of conventional circuit breaker, also have can communication characteristics, by the interconnected one-tenth regional network of the communication function of isolating switch, realize connected network communication, Centralized Monitoring, multiple electrical network parameter and operational factor are monitored, for can rapidly removing faults, at first to guarantee the reliability of isolating switch itself, therefore particularly important to the fault detect of isolating switch self.Usually isolating switch inside is provided with some annexes, the divide-shut brake of control isolating switch.Shunt release is a kind of annex of remote operation separating brake.When supply voltage equals arbitrary voltage between the 70%-110% of specified control supply voltage, just can reliable breaking circuit breaker.Under-voltage release is when its terminal voltage is reduced to a certain specialized range, makes isolating switch that a kind of electrical apparatus release of delaying time or not having the time-delay disconnection be arranged.Therefore, when certain voltage drop takes place supply voltage in the protected circuit, can cut off the electricity supply by the automatic cutout isolating switch, make the load appliance of this isolating switch connection or the damage that electrical equipment is avoided under-voltage.During use, the under-voltage release coil is connected on the circuit breaker electric source, and after the under-voltage release energising, isolating switch could close a floodgate, otherwise isolating switch closes not brake application.In the making electromagnet, after the magnet coil excitation, the electromagnet closure makes energy-stored spring discharge breaker closing.Above-mentioned annex generally all adopts solenoid, because its operating voltage generally is civil power, voltage is higher, for guaranteeing power consumption, the number of turn of coil is more, and the line footpath is thinner, in long-term use,, can make the coil inside broken string unavoidably owing to reasons such as thermal expansion, vibrations.Therefore, need the solenoid of above-mentioned accessories apparatus is carried out burn out detection, thus the basis for estimation that provides a signal whether solenoid to be broken to other circuit conduct, so that can in time judge the faults itself place of isolating switch, in time get rid of, recover the normal operation of circuit breaker state.
Chinese patent CN2481031Y discloses a kind of " multi-functional power-off alarm ", adopts relay coil to constitute the outage detection loop, with the normally closed contact j formation warning circuit of dry cell E, alarm chip IC, relay J.When carrying out outage detection, K switch 1 connects 2 pin, alarm switch K2 closure, and the relay J coil gets electric, and its normally closed contact j opens, and warning circuit drops on the alert.In case cut off the power supply, the relay J dead electricity, its normally closed contact j transfers to connect, and warning circuit sends news immediately and rings.Multi-functional power-off alarm of the present utility model is at the robber's line situation that takes place in the electrical network.
At present, it is identical that coil is carried out burn out detection and said apparatus, also adopts series relay to realize, as Fig. 1.Solenoid L connects much larger than the relay J of oneself with an internal resistance, gauge tap 3 is parallel to the relay J two ends, working power U1 puts on the concatermer of solenoid L and relay J, open gauge tap 3, the solenoid L energising of connecting with relay J, because the relay J internal resistance is much larger than solenoid L internal resistance, then the working power U1 overwhelming majority puts on the relay J, make the relay J adhesive, its normally opened contact closure, output " leading to " signal, expression solenoid L does not break, because the relay J internal resistance is very big, electric current is very little, can not make solenoid L operate as normal.When solenoid L breaks, solenoid L internal resistance ∞, electric current is 0, and relay J can not adhesive, and its normally opened contact keeps normally open, output " break " signal, expression solenoid L breaks.Connect gauge tap 3, working power U1 puts on solenoid L two ends, the not adhesive of relay J dead electricity, solenoid L operate as normal.Do not influence solenoid L operate as normal after that is to say series relay J.There is following shortcoming in the break detection circuit of above-mentioned solenoid: relay J with meet working power U1 after solenoid L connects, if when solenoid L work needs very big working power U1, the operating voltage of relay J is also very big, causes power consumption big, volume is big; When need make solenoid L operate as normal and during logical its working power U1, relay J then can not normally be exported the signal whether solenoid L breaks with dead electricity this moment, reliability is low; The internal resistance of relay J must be much smaller than the internal resistance of solenoid L, to the bad adaptability of solenoid L.
Summary of the invention
The solenoid break detection circuit that the purpose of this invention is to provide a kind of low-power consumption, high reliability, high-adaptability.
The object of the present invention is achieved like this, a kind of break detection circuit of solenoid, comprise working power U1, control device 3, it is characterized in that: the break detection circuit of described solenoid also comprises diode D1～D4, detect power supply U2, optocoupler G1 as signal output apparatus, the end of solenoid L meets diode D1 respectively, one end of the negative electrode of D2 and control device 3, the first input end of another termination optocoupler G1 of solenoid L and the anode of diode D1, the second input termination working power U1 of optocoupler G1 and the negative pole of detection power supply U2, the positive pole of working power U1 connects the other end of control device 3, the positive pole that detects power supply U2 connects the anode of diode D2, after diode D3 and the D4 series connection, the anode of diode D3 connects the first input end of optocoupler G1, and the negative electrode of diode D4 connects second input end of optocoupler G1.
When the present invention is button SB1 when control device 3, the end of the termination solenoid L of described button SB1 and the negative electrode of diode D1, D2, the positive pole of another termination working power U1.
When the present invention was triode VT1 when control device 3, the collector of described triode VT1 connect the positive pole of working power U1, and the emitter of triode VT1 connects the end of solenoid L, and the base stage of triode VT1 is used for receiving the triggering control signal.
In the break detection circuit of solenoid of the present invention, optocoupler G1 is the components and parts of low voltage operating, can adopt low-voltage so detect power supply U2, working power U1 that can only be by solenoid L with traditional break detection circuit detect and compares as detecting power supply, the testing circuit working current is little, therefore greatly reduces power consumption; Solenoid L adds work power supply U1, by entering normal operating conditions after control device 3 triggerings, optocoupler G1 can export the signal whether solenoid L breaks, when solenoid L does not work, still can export the signal whether solenoid L breaks by adding detection power supply U2, so, no matter whether solenoid L is in running order, all can export the signal whether solenoid L breaks, therefore improve reliability compared to traditional break detection circuit by optocoupler G1; Because optocoupler G1 works in little current status, when the internal resistance of solenoid L not simultaneously, electric current I 2 differences, only needing to adjust detection power supply U2 makes electric current I 2 enough drive the burn out detection that optocoupler G1 work just can realize solenoid L, must adopt internal resistance to export as signal much smaller than the relay of solenoid internal resistance than traditional break detection circuit, circuit of the present invention is to the no requirement (NR) of the internal resistance of solenoid L to be detected size, so, can adapt to multiple solenoid, adaptability height.
Description of drawings
Fig. 1 is existing solenoid break detection circuit.
Fig. 2 is a solenoid break detection circuit of the present invention.
Fig. 3 is the electrical schematic diagram of one embodiment of the invention.
Fig. 4 is the electrical schematic diagram of another embodiment of the present invention.
Embodiment
Fig. 3 is one embodiment of the invention.Control device 3 adopts button SB1, the end of the termination solenoid L of button SB1 and the negative electrode of diode D1, D2, the positive pole of another termination working power U1.Working power U1 is a high-voltage power supply, can drive solenoid L work, makes the electromagnetic system adhesive.Detecting power supply U2 is low-voltage, only can drive optocoupler G1 conducting and can not drive solenoid L work, and diode D1 is connected in parallel on solenoid L two ends, is fly-wheel diode.After diode D3, the D4 series connection, be connected in parallel on two input ends of optocoupler G1, limited the input terminal voltage of optocoupler G1, protection optocoupler G1 can not burn out because electric current I 1 is very big.Certainly, the present invention is not limited to two diode series connection, in order to guarantee the reliable conducting of optocoupler G1, increases the quantity of diode series connection according to the big I of optocoupler G1 input end forward voltage.Two output terminals of optocoupler G1 can be connected with the upper computer detection circuit.
When button SB1 disconnected, electric current I 1 was 0, detected power supply U2 and formed path by diode D2, solenoid L, optocoupler G1, formed electric current I 2, made the conducting of optocoupler G1 input end luminous, and output terminal is conducting state, and L is intact for expression output solenoid; If solenoid L broken string then can not form above-mentioned loop, optocoupler G1 input end is not luminous, and output terminal is cut-off state.Working power U1 forms path by solenoid L, optocoupler G1 when button SB1 is closed, form electric current I 1, because working power U1〉〉 detection power supply U2, diode D2 instead ends partially, detect power supply U2 and will no longer provide electric current, electric current I 2=0, it is luminous to drive the conducting of optocoupler G1 input end by electric current I 1, output terminal is conducting state, and L is intact for expression output solenoid; If solenoid L broken string then can not form above-mentioned loop, optocoupler G1 output terminal is a high-impedance state, expression solenoid L broken string.Whether host computer breaks to solenoid L according to the state of the output terminal of optocoupler G1 is judged, handles accordingly thereby control other circuit again.
Fig. 4 is an another embodiment of the present invention.Control device 3 adopts triode VT1, and the collector of triode VT1 connects the positive pole of working power U1, and the emitter of triode VT1 connects the end of solenoid L, and the base stage of triode VT1 is used for receiving the triggering control signal.
When triode VT1 is not a cut-off state during increase control signal.Electric current I 1 is 0, detects power supply U2 and forms current path by diode D2, solenoid L, optocoupler G1, makes the conducting of optocoupler G1 input end luminous, and output terminal is conducting state, and output solenoid L is serviceable condition.Conducting when triode VT1 increase control signal; working power U1 forms path by diode D1, solenoid L, optocoupler G1, triode VT1; form electric current I 1; because working power U1〉〉 detect power supply U2, so diode D2 instead ends partially, working power U2 will no longer provide electric current; electric current I 2=0; this moment, optocoupler G1 still exported Continuity signal, can limit the input terminal voltage of optocoupler G1 after same diode D3, the D4 series connection, and protection optocoupler G1 can not burn out because electric current I 1 is very big.When solenoid L broke, working power U1, detection power supply U2 all can't pass through the L shaped one-tenth path of solenoid, and electric current I 1, I2 are 0, and optocoupler G1 input end electric current is 0, and output terminal is cut-off state, and output solenoid L is the broken string state.No matter triode VT1 is in conducting or cut-off state, all can export optocoupler G1 conducting, the pick-off signal that whether cuts off the power supply corresponding with solenoid L, and the foundation of solenoid burn out detection is provided for other circuit.
Solenoid break detection circuit of the present invention is not limited to the burn out detection to the solenoid of circuit breaker accessory, is equally applicable to direct current generator, D.C. contactor, any burn out detection with solenoid of DC operation such as DC electromagnet.
Claims (4)
1. the break detection circuit of a solenoid, comprise working power (U1), control device (3), it is characterized in that: the break detection circuit of described solenoid also comprises diode D1～D4, detect power supply (U2), optocoupler (G1) as signal output apparatus, one end of solenoid (L) meets diode D1 respectively, one end of the negative electrode of D2 and control device (3), the first input end of another termination optocoupler (G1) of solenoid (L) and the anode of diode D1, the second input termination working power (U1) of optocoupler (G1) and the negative pole of detection power supply (U2), the positive pole of working power (U1) connects the other end of control device (3), the positive pole that detects power supply (U2) connects the anode of diode D2, after diode D3 and the D4 series connection, the anode of diode D3 connects the first input end of optocoupler (G1), and the negative electrode of diode D4 connects second input end of optocoupler (G1).
2, the break detection circuit of solenoid according to claim 1 is characterized in that described control device (3) is button (SB1) or triode (VT1).
3, the break detection circuit of solenoid according to claim 2, it is characterized in that when control device (3) is button (SB1), one end of one termination solenoid (L) of described button (SB1) and the negative electrode of diode D1, D2, the positive pole of another termination working power (U1).
4, the break detection circuit of solenoid according to claim 2, it is characterized in that when control device (3) is triode (VT1), the collector of described triode (VT1) connects the positive pole of working power (U1), the emitter of triode (VT1) connects an end of solenoid (L), and the base stage of triode (VT1) is used for receiving the triggering control signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100235079A CN100483143C (en) | 2007-06-06 | 2007-06-06 | Magnet coil break detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100235079A CN100483143C (en) | 2007-06-06 | 2007-06-06 | Magnet coil break detection circuit |
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| CN101059548A CN101059548A (en) | 2007-10-24 |
| CN100483143C true CN100483143C (en) | 2009-04-29 |
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| CNB2007100235079A Active CN100483143C (en) | 2007-06-06 | 2007-06-06 | Magnet coil break detection circuit |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101949988B (en) * | 2010-08-24 | 2012-06-27 | 浙江中控技术股份有限公司 | Detection device of level-type signal disconnection fault |
| CN103018619A (en) * | 2012-11-19 | 2013-04-03 | 宁波舜利高压开关科技有限公司 | Detection circuit of open circuit of operating mechanism opening coil and detection method thereof |
| CN104251947B (en) * | 2014-08-26 | 2017-06-06 | 龙口中宇机械有限公司 | A kind of magnet coil trouble-shooter |
| CN104569800B (en) * | 2014-12-26 | 2017-04-05 | 江苏国星电器有限公司 | Device for under-voltage releasing equipment state monitoring device |
| CN104917403A (en) * | 2015-05-25 | 2015-09-16 | 张家港市华为电子有限公司 | Automatic switching circuit in power supply applicable to 220V and 110V power grids |
| CN108519541A (en) * | 2018-04-23 | 2018-09-11 | 珠海深圳清华大学研究院创新中心 | A kind of detection circuit and detection device |
| CN109188171B (en) * | 2018-09-12 | 2021-01-15 | 苏州东安岩芯能源科技股份有限公司 | Relay coil open-circuit fault detection circuit |
| CN109444731A (en) * | 2018-11-08 | 2019-03-08 | 北京汇能精电科技股份有限公司 | DC relay closed state detection device |
| CN110389265A (en) * | 2019-07-12 | 2019-10-29 | 湖南沛科交通工程技术股份有限公司 | A kind of LoRa Wireless data acquisition unit test macro and its test method |
| CN112723074B (en) * | 2020-12-30 | 2022-06-07 | 日立电梯（中国）有限公司 | Contact detection method, storage medium and elevator |
| CN113687134B (en) * | 2021-08-25 | 2024-02-13 | 绵阳市维博电子有限责任公司 | Current sensor circuit with comprehensive diagnosis function and current sensor |
| CN116047377B (en) * | 2023-03-27 | 2023-06-30 | 江苏纳通能源技术有限公司 | Contactor coil detection circuit and method |
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| CN101059548A (en) | 2007-10-24 |
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