CN101699683A - Undervoltage release - Google Patents
Undervoltage release Download PDFInfo
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- CN101699683A CN101699683A CN200910310119A CN200910310119A CN101699683A CN 101699683 A CN101699683 A CN 101699683A CN 200910310119 A CN200910310119 A CN 200910310119A CN 200910310119 A CN200910310119 A CN 200910310119A CN 101699683 A CN101699683 A CN 101699683A
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Abstract
The invention relates to an undervoltage release, which comprises a capacitive charging booster type starting power circuit, a self feedback dual-limit detection circuit, a relay switching circuit and an electromagnet coil. The starting power circuit is connected with the self feedback dual-limit detection circuit, the relay switching circuit and the electromagnet coil, and the control output end of the self feedback dual-limit detection circuit is connected with the control input end of the relay switching circuit; the relay switching circuit comprises a relay; when the voltage of a power grid is kept at a release voltage or higher than the release voltage after reaching a pull-in voltage, a relay coil and the electromagnet coil form a serially connected loop; when the voltage of the power grid is lower than the release voltage, the electromagnet coil is in a state of an open circuit; and when the voltage of the power grid restores to the pull-in voltage or higher than the pull-in voltage, the relay coil and the electromagnet coil form a serially connected loop again. The undervoltage release has the advantages of low calorific power, big release instant starting torque, very simple circuit, reliable work, high efficiency and the like.
Description
Technical field
The present invention relates to a kind of device for under-voltage releasing equipment, especially a kind of electromagnetic undervoltage release.
Background technology
Device for under-voltage releasing equipment is the core component in the low tension switch, and the working method that device for under-voltage releasing equipment drives push rod has two types of electromagnetic type and permanent-magnet types.
Compare with the permanent-magnet type device for under-voltage releasing equipment, it is simple that electromagnetic undervoltage release has a circuit, and after the outage, push rod has " resetting certainly " ability under the effect of spring force.
There is following weak point in the electromagnetic undervoltage release of prior art: relay coil and electromagnet coil in conducting time-division other places in different loops, the electric current that causes flowing through relay coil and electromagnet coil is often bigger, thereby cause each coil heating bigger, whole efficiency is lower, both waste electric energy, influenced the useful life of release again.Also there is too problem such as complexity of the less or circuit of staring torque in existing electromagnetic undervoltage release.
Summary of the invention
Technical problem to be solved by this invention provides a kind of simple in structure, caloric value and bigger device for under-voltage releasing equipment of device for under-voltage releasing equipment staring torque of being suitable for reducing greatly relay coil and electromagnet coil.
For solving the problems of the technologies described above, device for under-voltage releasing equipment of the present invention comprises: the electric capacity charging booster type that is used for linking to each other with electrical network starts power circuit, self feed back two margining detecting circuit, relay commutation circuits and is used to thread off the electromagnet coil of control; The power output end of described startup power circuit detects input, the power input of relay commutation circuit and the power input of electromagnet coil with the power supply of the two margining detecting circuits of self feed back and links to each other, and the control output end of the two margining detecting circuits of self feed back links to each other with the control input end of relay commutation circuit; The relay commutation circuit comprises relay; After reaching pick-up voltage, line voltage remains on release voltage and when above, relay coil and described electromagnet coil constitute series loop; When line voltage was lower than release voltage, described electromagnet coil opened circuit; Return to pick-up voltage and when above, described relay coil and described electromagnet coil reconstitute series loop at line voltage.
Further, described startup power circuit comprises: be used for the π type filter circuit that links to each other with electrical network, the decompression capacitor that links to each other with the power output end of π type filter circuit, the rectification circuit that links to each other with the power output end of decompression capacitor, anodal linking to each other with the dc output end of rectification circuit and the power-assisted startup electric capacity of minus earth; The positive pole of power-assisted startup electric capacity is the power output end of described startup power circuit.
Further, the two margining detecting circuits of described self feed back comprise: be located at positive pole and first divider resistance between the ground, second divider resistance and the 3rd divider resistance that power-assisted starts electric capacity successively after the series connection, in the same way first comparator that links to each other with the contact of first divider resistance and second divider resistance of input, second comparator, the emitter and collector that link to each other with the output of first comparator of input is connected to the PNP triode at the two ends of the 3rd divider resistance in the same way; The output of first comparator is connected in series the input in the same way that connects first comparator behind the 4th resistance, first diode, to form regenerative circuit; The reverse input end of first comparator and second comparator connects+the 5V direct voltage; The collector electrode of PNP triode links to each other through the output of the 6th resistance with first comparator, is provided with pull down resistor between the collector electrode of PNP triode and the ground; The output of second comparator is the control output end of the two margining detecting circuits of described self feed back.
Further, described relay commutation circuit also comprises: NPN triode, the 3rd diode with the relay coil parallel connection, current input terminal and described power-assisted start voltage stabilizing current-limiting resistance that the positive pole of electric capacity links to each other, be arranged on+and the current limliting bleeder circuit of connecting and constituting by the 9th resistance and the tenth resistance between the base stage of 12V direct voltage and NPN triode;
Further, the contact of the 9th resistance and the tenth resistance links to each other with the output of described second comparator, the emitter of NPN triode is connected in series ground connection behind the 4th diode, the current output terminal of the collector connecting relay coil of NPN triode, the current input terminal of relay coil is succeeded the fixed contact of electrical equipment diverter switch, and two moving contacts of relay diverter switch connect the current output terminal of voltage stabilizing current-limiting resistance and the current output terminal of electromagnet coil respectively; Electromagnet coil is parallel with the 5th diode.
Further, the current input terminal of described relay coil with constitute by the 7th electric capacity and the second voltage-stabiliser tube parallel connection+power end of 12V voltage stabilizing circuit links to each other, so that described+12V direct voltage to be provided; One termination of the 8th resistance is described+the 12V direct voltage, the other end with constitute by the 6th electric capacity and the first voltage-stabiliser tube parallel connection+power end of 5V voltage stabilizing circuit links to each other, should+the 5V voltage stabilizing circuit is used to provide described+5V direct voltage.
Further, the output of described first comparator is connected in series the 7th resistance and links to each other with the output of+12V voltage stabilizing circuit; The contact of first divider resistance and second divider resistance is connected in series ground connection behind the 5th electric capacity.
The present invention has positive effect with respect to prior art: (1) device for under-voltage releasing equipment of the present invention has solved too little etc. the technical problem of complexity, poor reliability, electromagnet coil caloric value height and staring torque of existing electromagnetic undervoltage release circuit, release of the present invention has electric capacity charging booster type and starts power circuit, the startup electric capacity of voltage wherein higher (line voltage 1.44 times) can directly be powered to electromagnet coil, so recover just often at line voltage, the starting torque of release is bigger; At line voltage just often, relay coil and electromagnet coil constitute series loop, and power consumption and caloric value are all less, the undervoltage tripping occasion of various low tension switch requirements such as that device for under-voltage releasing equipment of the present invention is applicable to is self-priming, Sucking-assisting type.(2) among the present invention, line voltage by behind the step-down electricity capacitance decompression, converts direct voltage to through bridge rectifier again through filter circuit filtering, then to starting the electric capacity charging.Started electric capacity before the normally opened contact of relay is not closed, charging in advance, detect its magnitude of voltage by the two margining detecting circuits of self feed back, and according to the voltage judgement line voltage that starts electric capacity, when line voltage reaches pick-up voltage, make relay coil and electromagnet coil constitute series loop by the control relay commutation circuit.The normally opened contact closure of relay (be relay coil and electromagnet coil constitute series loop) moment starts that electric charge all is released to electromagnet coil on the electric capacity, plays " power-assisted startup " purpose, so starting torque is bigger.After the normally opened contact closure, the voltage on the electromagnet coil is by the decision of the capacity of decompression capacitor, and decompression capacitor do not produce active power, and the whole caloric value of release can further reduce.When the electric current part in the electromagnet coil flowed to relay coil, another part flowed to second voltage-stabiliser tube, realization+12V direct current self-supporting power.(3) among the present invention, the two margining detecting circuits of self feed back record line voltage and reach and remain on release voltage behind the pick-up voltage and when above, first comparator is wherein exported high level and is kept by positive feedback, to overcome " critical flutter ", block first triode simultaneously, make the 3rd divider resistance adding work.When line voltage is lower than release voltage, the two margining detecting circuit output low levels of self feed back, normally opened contact disconnects, the normally-closed contact closure, voltage stabilizing current-limiting resistance and relay coil constitute series loop.(4) among the present invention, before the normally opened contact closure of relay, the electric current that the working power of the two margining detecting circuits of self feed back provides to second voltage-stabiliser tube from the voltage stabilizing current-limiting resistance, after the normally opened contact closure of relay, electromagnet coil is connected with relay coil, utilize the energy to greatest extent, further reduced the caloric value of electromagnetic type release.So electromagnetic undervoltage release of the present invention, it is little to have caloric value, and dropout instantaneous starting moment is big, and circuit is very simple, reliable operation, efficient advantages of higher.
Description of drawings
For the easier quilt of content of the present invention is clearly understood, below the specific embodiment and in conjunction with the accompanying drawings of basis, the present invention is further detailed explanation, wherein
Fig. 1 is the circuit theory diagrams of device for under-voltage releasing equipment among the embodiment 1.
Embodiment
(embodiment 1)
See Fig. 1, the device for under-voltage releasing equipment of present embodiment comprises: the electric capacity charging booster type that is used for linking to each other with electrical network starts power circuit, self feed back two margining detecting circuit, relay commutation circuits and is used to thread off the electromagnet coil of control; The power output end of described startup power circuit detects input, the power input of relay commutation circuit and the power input of electromagnet coil with the power supply of the two margining detecting circuits of self feed back and links to each other, and the control output end of the two margining detecting circuits of self feed back links to each other with the control input end of relay commutation circuit; The relay commutation circuit comprises relay; Relay comprises: relay coil JK, a fixed contact and two moving contacts; After reaching pick-up voltage (be generally normal voltage 85%), line voltage remains on release voltage (be generally normal voltage 50%) and when above, relay coil JK and described electromagnet coil constitute series loop; When line voltage was lower than release voltage, described electromagnet coil opened circuit; Return to pick-up voltage and when above, described relay coil and described electromagnet coil reconstitute series loop at line voltage.
Starting power circuit comprises: π type filter circuit, the decompression capacitor C3 that links to each other with the power output end of π type filter circuit, the rectification circuit BG1 that links to each other with the power output end of decompression capacitor C3, the positive pole that is used for linking to each other with electrical network links to each other with the dc output end of rectification circuit BG1 and the power-assisted of minus earth starts capacitor C 4; The positive pole of power-assisted startup capacitor C 4 is the power output end VH of described startup power circuit.
The two margining detecting circuits of described self feed back comprise: be located at positive pole and the sampling loop between the ground (the first divider resistance R1, the second divider resistance R2 and the 3rd divider resistance R3 that comprise series connection successively) that power-assisted starts capacitor C 4, in the same way the first comparator U1A that links to each other with the contact of the first divider resistance R1 and the second divider resistance R2 of input, the PNP triode T1 at the second comparator U1B that links to each other with the output of the first comparator U1A of input, two ends that emitter and collector is connected to the 3rd divider resistance R3 in the same way; The output of the first comparator U1A is connected in series and connects the first comparator U1A, input in the same way behind the 4th resistance R 4, the first diode D1, to form regenerative circuit, prevented " critical flutter ", block PNP triode T1 simultaneously, it is ended, and the 3rd divider resistance R3 adds sampling loop.During the high level of first comparator U1A output, the second comparator U1B " isolation " drives subsequent conditioning circuit, and electromagnet coil is got.
The reverse input end of the first comparator U1A and the second comparator U1B connects+the 5V direct voltage; The collector electrode of PNP triode T1 links to each other with the output of the first comparator U1A through the 6th resistance R 6, is provided with pull down resistor R5 between the collector electrode of PNP triode T1 and the ground; The output of the second comparator U1B is the control output end of the two margining detecting circuits of described self feed back.
Described relay commutation circuit also comprises: NPN triode T3, the 3rd diode D3 with relay coil JK parallel connection, current input terminal and described power-assisted start voltage stabilizing current-limiting resistance R11 that the positive pole of capacitor C 4 links to each other, be arranged on+and the current limliting bleeder circuit of connecting and constituting by the 9th resistance R 9 and the tenth resistance R 10 between the base stage of 12V direct voltage and NPN triode T3; The contact of the 9th resistance R 9 and the tenth resistance R 10 links to each other with the output of the described second comparator U1B, the emitter of NPN triode T3 is connected in series ground connection behind the 4th diode D4, the current output terminal of the collector connecting relay coil JK of NPN triode T3, the current input terminal of relay coil JK is succeeded the fixed contact of electrical equipment diverter switch K, and two moving contacts of relay diverter switch K connect the current output terminal of voltage stabilizing current-limiting resistance R11 and the current output terminal of electromagnet coil respectively; Electromagnet coil is parallel with the 5th diode D5.
The current input terminal of described relay coil JK with constitute by the 7th capacitor C 7 and the second voltage-stabiliser tube Z2 parallel connection+power end of 12V voltage stabilizing circuit links to each other, so that described+12V direct voltage to be provided; One termination of the 8th resistance R 8 is described+the 12V direct voltage, the other end with constitute by the 6th capacitor C 6 and the first voltage-stabiliser tube Z1 parallel connection+power end of 5V voltage stabilizing circuit links to each other, should+the 5V voltage stabilizing circuit is used to provide described+5V direct voltage.
The output of the first comparator U1A is connected in series the 7th resistance R 7 and links to each other with the output of+12V voltage stabilizing circuit; The contact of the first divider resistance R1 and the second divider resistance R2 is connected in series the 5th capacitor C 5 back ground connection.
Because the electromagnet coil operating current is bigger, electric after, the direct voltage that power-assisted starts capacitor C 4 positive poles after the rectification quickly falls to tens volts from about 300 volts.The decompression capacitor C3 of this moment serves as hypotensive effect.
When line voltage drop to be lower than normal voltage 50% the time, the line voltage after rectification causes the first comparator U1A " counter-rotating ", output low level, electromagnet dead electricity by resistance R 1 and R2, the sampling of R3 dividing potential drop.
Line voltage rise to normal voltage 85% before, the direct voltage VH after the rectification provides electric current of voltage regulation through resistance R 11 to the second voltage-stabiliser tube Z2, formation+12V voltage is for detecting loop, delayed releasing loop works.
When line voltage rise to normal voltage 85% after, the high level through the second comparator U1B isolates output makes triode T3 saturation conduction, relay coil gets electric, the normally opened contact closure makes electromagnet coil and relay coil constitute series via; Electromagnetic actuation is realized self-supporting power.
Obviously, the above embodiment of the present invention only is for example of the present invention clearly is described, and is not to be qualification to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all execution modes.And these belong to conspicuous variation or the change that spirit of the present invention extended out and still are among protection scope of the present invention.
Claims (6)
1. a device for under-voltage releasing equipment is characterized in that comprising: be used for electric capacity charging booster type startup power circuit, self feed back two margining detecting circuit, the relay commutation circuits that link to each other with electrical network and the electromagnet coil of the control that is used to thread off;
The power output end of described startup power circuit detects input, the power input of relay commutation circuit and the power input of electromagnet coil with the power supply of the two margining detecting circuits of self feed back and links to each other, and the control output end of the two margining detecting circuits of self feed back links to each other with the control input end of relay commutation circuit;
The relay commutation circuit comprises relay; This relay comprise after line voltage reaches pick-up voltage, remain on release voltage and when above and described electromagnet coil constitutes series loop, when line voltage is lower than release voltage and described electromagnet coil opens circuit, line voltage return to pick-up voltage and when above and described electromagnet coil reconstitute the relay coil (JK) of series loop.
2. device for under-voltage releasing equipment according to claim 1 is characterized in that: described startup power circuit comprises: be used for the π type filter circuit that links to each other with electrical network, the decompression capacitor (C3) that links to each other with the power output end of π type filter circuit, the rectification circuit (BG1) that links to each other with the power output end of decompression capacitor (C3), anodal linking to each other with the dc output end of rectification circuit (BG1) and the power-assisted startup electric capacity (C4) of minus earth; The positive pole of power-assisted startup electric capacity (C4) is the power output end (VH) of described startup power circuit.
3. device for under-voltage releasing equipment according to claim 2, it is characterized in that: the two margining detecting circuits of described self feed back comprise: be located at power-assisted successively after the series connection and start the positive pole of electric capacity (C4) and first divider resistance (R1) between the ground, second divider resistance (R2) and the 3rd divider resistance (R3), first comparator (U1A) that links to each other with the contact of first divider resistance (R1) and second divider resistance (R2) of input in the same way, second comparator (U1B) that links to each other with the output of first comparator (U1A) of input in the same way, emitter and collector is connected to the PNP triode (T1) at the two ends of the 3rd divider resistance (R3);
The output of first comparator (U1A) is connected in series the input in the same way that connects first comparator (U1A) behind the 4th resistance (R4), first diode (D1), to form regenerative circuit; The reverse input end of first comparator (U1A) and second comparator (U1B) connects+the 5V direct voltage;
The collector electrode of PNP triode (T1) links to each other through the output of the 6th resistance (R6) with first comparator (U1A), is provided with pull down resistor (R5) between the collector electrode of PNP triode (T1) and the ground;
The output of second comparator (U1B) is the control output end of the two margining detecting circuits of described self feed back.
4. device for under-voltage releasing equipment according to claim 3 is characterized in that: described relay commutation circuit also comprises: between the base stage of NPN triode (T3), start voltage stabilizing current-limiting resistance (R11) that the positive pole of electric capacity (C4) links to each other with in parallel the 3rd diode (D3) of relay coil (JK), current input terminal and described power-assisted, be arranged on+12V direct voltage and NPN triode (T3) by the connect current limliting bleeder circuit of formation of the 9th resistance (R9) and the tenth resistance (R10);
The contact of the 9th resistance (R9) and the tenth resistance (R10) links to each other with the output of described second comparator (U1B), the emitter of NPN triode (T3) is connected in series the 4th diode (D4) back ground connection, the current output terminal of the collector connecting relay coil (JK) of NPN triode (T3), the current input terminal of relay coil (JK) is succeeded the fixed contact of electrical equipment diverter switch (K), and two moving contacts of relay diverter switch (K) connect the current output terminal of voltage stabilizing current-limiting resistance (R11) and the current output terminal of electromagnet coil respectively; Electromagnet coil is parallel with the 5th diode (D5).
5. device for under-voltage releasing equipment according to claim 4, it is characterized in that: the current input terminal of described relay coil (JK) with by the 7th electric capacity (C7) and second voltage-stabiliser tube (Z2) in parallel constitute+power end of 12V voltage stabilizing circuit links to each other, so that described+12V direct voltage to be provided; One termination of the 8th resistance (R8) is described+the 12V direct voltage, the other end with by the 6th electric capacity (C6) and first voltage-stabiliser tube (Z1) in parallel constitute+power end of 5V voltage stabilizing circuit links to each other, this+the 5V voltage stabilizing circuit is used to provide described+5V direct voltage.
6. device for under-voltage releasing equipment according to claim 5 is characterized in that: the output of described first comparator (U1A) is connected in series the 7th resistance (R7) and links to each other with the output of+12V voltage stabilizing circuit;
The contact of first divider resistance (R1) and second divider resistance (R2) is connected in series the 5th electric capacity (C5) back ground connection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910310119.8A CN101699683B (en) | 2009-11-20 | 2009-11-20 | Undervoltage release |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910310119.8A CN101699683B (en) | 2009-11-20 | 2009-11-20 | Undervoltage release |
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| CN101699683A true CN101699683A (en) | 2010-04-28 |
| CN101699683B CN101699683B (en) | 2011-11-23 |
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| CN200910310119.8A Expired - Fee Related CN101699683B (en) | 2009-11-20 | 2009-11-20 | Undervoltage release |
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| CN102170540A (en) * | 2011-01-26 | 2011-08-31 | 深圳Tcl新技术有限公司 | Input power supply voltage sampling and shutdown capacitance discharging circuit |
| CN102709875A (en) * | 2012-05-30 | 2012-10-03 | 江苏国星电器有限公司 | Under-voltage and over-voltage two-way release |
| CN102709876A (en) * | 2012-05-30 | 2012-10-03 | 江苏国星电器有限公司 | Zero-voltage delay release |
| CN103325633A (en) * | 2013-05-08 | 2013-09-25 | 江苏国星电器有限公司 | Electromagnetic type undervoltage release |
| CN104377645A (en) * | 2012-07-02 | 2015-02-25 | 常州工学院 | Low-power-consumption undervoltage tripper |
| CN104377644A (en) * | 2012-07-02 | 2015-02-25 | 常州工学院 | Undervoltage tripping device |
| CN104655913A (en) * | 2015-01-29 | 2015-05-27 | 浙江正泰电器股份有限公司 | Low-voltage fault judgment circuit and double power supply changeover switch controller |
| CN109119303A (en) * | 2018-09-20 | 2019-01-01 | 南电电气有限公司 | Device for under-voltage releasing equipment |
| CN109933041A (en) * | 2017-12-19 | 2019-06-25 | 上海亿盟电气自动化技术有限公司 | A kind of online self-diagnostic circuit of low pressure controller |
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| CN2566444Y (en) * | 2002-04-30 | 2003-08-13 | 常熟开关厂 | Electronic controller for undervoltage tripping device |
| JP2005135690A (en) * | 2003-10-29 | 2005-05-26 | Fuji Electric Fa Components & Systems Co Ltd | Undervoltage tripping device of circuit breaker |
| CN201118197Y (en) * | 2007-11-08 | 2008-09-17 | 德力西电气有限公司 | Alternating current voltage under-voltage releasing equipment control circuit |
| CN201608136U (en) * | 2009-11-20 | 2010-10-13 | 常州工学院 | Undervoltage releaser |
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| CN102170540A (en) * | 2011-01-26 | 2011-08-31 | 深圳Tcl新技术有限公司 | Input power supply voltage sampling and shutdown capacitance discharging circuit |
| CN102170540B (en) * | 2011-01-26 | 2015-05-20 | 深圳Tcl新技术有限公司 | Input power supply voltage sampling and shutdown capacitance discharging circuit |
| CN102709876B (en) * | 2012-05-30 | 2015-04-08 | 江苏国星电器有限公司 | Zero-voltage delay release |
| CN102709876A (en) * | 2012-05-30 | 2012-10-03 | 江苏国星电器有限公司 | Zero-voltage delay release |
| CN102709875B (en) * | 2012-05-30 | 2014-11-05 | 江苏国星电器有限公司 | Under-voltage and over-voltage two-way release |
| CN102709875A (en) * | 2012-05-30 | 2012-10-03 | 江苏国星电器有限公司 | Under-voltage and over-voltage two-way release |
| CN104377644A (en) * | 2012-07-02 | 2015-02-25 | 常州工学院 | Undervoltage tripping device |
| CN104377645A (en) * | 2012-07-02 | 2015-02-25 | 常州工学院 | Low-power-consumption undervoltage tripper |
| CN104377644B (en) * | 2012-07-02 | 2017-07-11 | 常州工学院 | A kind of device for under-voltage releasing equipment |
| CN104377645B (en) * | 2012-07-02 | 2018-08-24 | 常州工学院 | Low-power consumption device for under-voltage releasing equipment |
| CN103325633B (en) * | 2013-05-08 | 2015-03-04 | 江苏国星电器有限公司 | Electromagnetic type undervoltage release |
| CN103325633A (en) * | 2013-05-08 | 2013-09-25 | 江苏国星电器有限公司 | Electromagnetic type undervoltage release |
| CN104655913A (en) * | 2015-01-29 | 2015-05-27 | 浙江正泰电器股份有限公司 | Low-voltage fault judgment circuit and double power supply changeover switch controller |
| CN109933041A (en) * | 2017-12-19 | 2019-06-25 | 上海亿盟电气自动化技术有限公司 | A kind of online self-diagnostic circuit of low pressure controller |
| CN109119303A (en) * | 2018-09-20 | 2019-01-01 | 南电电气有限公司 | Device for under-voltage releasing equipment |
| CN110286336A (en) * | 2019-07-04 | 2019-09-27 | 北京市速连科通信设备有限责任公司 | A kind of power detector |
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Assignee: Natu (Changzhou) Electric Co., Ltd. Assignor: Changzhou Polytechnic College Contract record no.: 2012320000438 Denomination of invention: Electromagnetic undervoltage release Granted publication date: 20111123 License type: Exclusive License Open date: 20100428 Record date: 20120412 |
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Granted publication date: 20111123 Termination date: 20191120 |