CN109962444A - A kind of dc circuit breaker - Google Patents

A kind of dc circuit breaker Download PDF

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Publication number
CN109962444A
CN109962444A CN201910369938.3A CN201910369938A CN109962444A CN 109962444 A CN109962444 A CN 109962444A CN 201910369938 A CN201910369938 A CN 201910369938A CN 109962444 A CN109962444 A CN 109962444A
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CN
China
Prior art keywords
module
breaker
major loop
thermal energy
heating module
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN201910369938.3A
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Chinese (zh)
Inventor
徐翘楚
刘洪武
何艳峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Changshu Switchgear Manufacturing Co Ltd
Original Assignee
Changshu Switchgear Manufacturing Co Ltd
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.)
Filing date
Publication date
Application filed by Changshu Switchgear Manufacturing Co Ltd filed Critical Changshu Switchgear Manufacturing Co Ltd
Priority to CN201910369938.3A priority Critical patent/CN109962444A/en
Publication of CN109962444A publication Critical patent/CN109962444A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00Details of emergency protective circuit arrangements
    • H02H1/06Arrangements for supplying operative power
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02NELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N11/00Generators or motors not provided for elsewhere; Alleged perpetua mobilia obtained by electric or magnetic means
    • H02N11/002Generators

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  • Fuses (AREA)

Abstract

The invention discloses a kind of dc circuit breakers, belong to low voltage electrical apparatus technology field.Dc circuit breaker of the present invention includes the electronic module for carrying out detection to main circuit current and being controlled according to testing result breaker, and for providing the power module of power supply for the electronic module;The power module includes the heating module for obtaining thermal energy from the major loop, and thermal energy acquired in heating module is converted to the temperature-difference power generation module of electric energy needed for electronic module using temperature difference heat electricity generating principle.The present invention extracts energy from breaker major loop using temperature difference heat electricity generating principle to power for breaker, electric energy needed for thermal energy produced by thermal energy produced by major loop itself and/or the heating element being electrically connected with major loop is converted to the electronic module of breaker, it does not need to increase additional accessory power supply, thoroughly solves the power supply problem of electronic direct-current breaker.

Description

A kind of dc circuit breaker
Technical field
The present invention relates to a kind of dc circuit breakers, belong to low voltage electrical apparatus technology field.
Background technique
The importance of dc circuit breaker is more and more prominent in direct-flow distribution system, and traditional dc circuit breaker generally uses Based on electromagnetic type or Thermomagnetic type release, but under this overall situation of the electronic information of high speed development and the communication technology, pass The dc circuit breaker of system has been unable to satisfy needs, thus the dc circuit breaker with electronic type release be develop at present it is generous To.In the AC circuit breaker with electronic type release, generally the most commonly used is returned by coil electromagnetism induction from breaker master Electric energy is obtained in road to use to supply electronic trip unit, and since electric current is constant, there is no variation, nothings in dc circuit breaker Method obtains electric energy using electromagnetic induction coil, and the power supply plan of electronic module is always the intelligentized pass of dc circuit breaker Key, currently used settling mode are using additional accessory power supply, and one side accessory power supply needs to regularly replace or charge, shadow The security reliability of system is rung;On the other hand the volume and cost of system are increased.Therefore, there is an urgent need to one kind not to depend on electricity The method of rheology come stably obtain electric energy from breaker major loop supply electronic module operation.
Summary of the invention
Do not depend on curent change the technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and to provide one kind and The dc circuit breaker that electric energy is powered can be stably obtained from breaker major loop.
The present invention specifically uses following technical scheme to solve above-mentioned technical problem:
A kind of dc circuit breaker, including for detect and according to testing result control breaker to main circuit current Electronic module, and for providing the power module of power supply for the electronic module;The power module includes for from institute It states major loop and obtains the heating module of thermal energy, and thermal energy acquired in heating module is converted into electricity using temperature difference heat electricity generating principle The temperature-difference power generation module of electric energy needed for submodule.
Preferably, the heating module includes direct heating module and/or indirect heating module;The direct heating module Directly extract thermal energy produced by major loop;The indirect heating module is by the heating element that is electrically connected with major loop by major loop In electric energy be converted to thermal energy.
Preferably, the direct heating module includes the thermally conductive of at least a piece of terminal block surface for being fixed on the breaker Plate.
It is further preferred that the heat-conducting plate is fixed on the terminal block surface of the breaker by heat conductive silica gel.
Preferably, the temperature-difference power generation module includes at least one thermoelectric generator, and the thermoelectric generator includes hot end Heat transfer sheet, cold end cooling fin and abutting are fixed on the thermoelectric generation film between the hot end heat transfer sheet and cold end cooling fin.
Further, the electronic module further includes energy-storage module.
Compared with prior art, technical solution of the present invention has the advantages that
The present invention extracts energy from breaker major loop using temperature difference heat electricity generating principle to power for breaker, efficiently solves Due in dc circuit breaker major loop be stable DC stream and be not available based on electromagnetic induction take energy by way of The problem of, thermal energy produced by thermal energy produced by major loop itself and/or the heating element being electrically connected with major loop is converted to disconnected Electric energy needed for the electronic module of road device does not need to increase additional accessory power supply, thoroughly solves electronic direct-current breaker Power supply problem.
Detailed description of the invention
Fig. 1 is the power supply schematic diagram of dc circuit breaker of the present invention;
Fig. 2 is the basic structure schematic diagram of thermoelectric generator;
Fig. 3 is the action principle schematic diagram of indirect heating module;
Fig. 4 is the schematic illustration of indirect heating module and direct heating module immixture;
Fig. 5 is the structural schematic diagram of one specific embodiment of dc circuit breaker of the present invention;
Fig. 6 is the schematic diagram of the preferred installation site in several places of heating module;
Fig. 7 is the specific mounting connection structure schematic diagram of power module in specific embodiment.
Appended drawing reference meaning in figure is specific as follows:
1, major loop, 2, temperature-difference power generation module, 3, electronic module, 4, arc-chutes, 5, operating mechanism, 6, heating module, 11, power supply Side terminal, 12, static contact, 13, moving contact, 14, load side lug end, 21, hot end heat transfer sheet, 22, thermoelectric generation film, 23, Cold end cooling fin.
Specific embodiment
For in dc circuit breaker major loop by be that stable DC stream is not available based on electromagnetic induction The problem of taking energy mode, thinking of the invention are to extract energy from breaker major loop using temperature difference heat electricity generating principle, will be led Electricity needed for thermal energy produced by thermal energy produced by circuit itself and/or the heating element being electrically connected with major loop is converted to breaker Can, it does not need to increase additional accessory power supply, thoroughly solves the power supply problem of electronic direct-current breaker.
Temperature difference heat power generation is a kind of newer generation mode, mainly utilizes the Seebeck effect of thermoelectric material (Seebeck Effect) carries out transporting for energy by carrier (electrons and holes), converts heat into electric energy.The effect It was found in 1821 by German Seebeck: in the circuit that two kinds of different metals (antimony and copper) are constituted, if two joints There are temperature difference, around just will appear magnetic field.By further testing, Seebeck has found that there are electromotive force in circuit. Seebeck effect is to make the basis of temperature thermocouple, thermo-electric generation and temperature difference electric transducer.The basic principle of thermo-electric generation has Body are as follows: one end of two distinct types of thermo-electric converting material N and P is combined and placed it in the condition of high temperature, other end open circuit And give low temperature, since the thermal excitation of temperature end is stronger, the hole at this end and electron concentration are higher than low-temperature end, this Under the driving of carrier density gradient, hole and electronics are spread to low-temperature end, to form potential difference in low temperature open end.It will be permitted Multipair p-type and N-type thermo-electric converting material connect comprising modules, so that it may obtain sufficiently high voltage, form a temperature difference hair Motor.Thermal energy can be converted into electric energy by this generator under the conditions of having existing for small temperature difference, and in conversion process Mechanical moving element is not needed, also no gaseous or liquid medium exist, therefore wide adaptation range, small in size, light-weight, safety can Lean on, to environment without any pollution, be very ideal power supply.Flexible, green, quiet and micro volume the spy of thermo-electric generation Property, make it that can play an important role in many fields.
Specifically, dc circuit breaker proposed by the invention, including for detect simultaneously basis to main circuit current The electronic module that testing result controls breaker, and for providing the power module of power supply for the electronic module; The power module includes the heating module for obtaining thermal energy from the major loop, and will be sent out using temperature difference heat electricity generating principle Thermal energy acquired in thermal modules is converted to the temperature-difference power generation module of electric energy needed for electronic module.
The power supply the principle of the power module as shown in Figure 1, heating module obtains thermal energy from breaker major loop, acquisition Electric energy is converted to the electronic module of supply breaker after electric energy by temperature-difference power generation module.As shown in Figure 1, in order to further increase Energy-storage module can be also arranged in the reliability of power supply in the electronic module, extra electric energy is stored, in temperature-difference power generation module It powers when electricity shortage to electronic module.
Common thermoelectric generator structure is as shown in Fig. 2, include that hot end heat transfer sheet, cold end cooling fin and abutting are fixed on Hot end heat transfer sheet is close to heating module, cold end heat dissipation by the thermoelectric generation film between the hot end heat transfer sheet and cold end cooling fin Another side surface of piece is exposed in air, and thermoelectric generation film can be to electronic module output voltage.
Sustainedly and stably by DC current in the major loop of dc circuit breaker, major loop itself due to there are resistance to The continual generation heat of meeting, therefore can use the heat-conducting plate with good heat conductive characteristic and directly transmit this partial heat energy Hot end heat transfer sheet into temperature-difference power generation module carries out heat to electricity conversion, this heating system can be known as direct heating system, Correspondingly, it is only necessary to heat-conducting plate is fixed on to the surface at the larger position of the such calorific value of such as terminal block in breaker major loop, It may make up direct heating module.Heat-conducting plate can be fixed using fasteners such as insulated bolt, plastic strapping tapes, but best The terminal block surface of breaker major loop, heat conductive silica gel are pasted and fixed on using the heat conductive silica gel with Thermal conductivity Gap between heat-conducting plate and terminal block can be filled up so that heat transfer it is stable and uniform.
Smaller for electric current in major loop, lower dc circuit breaker of calorific value itself can also be using electric with major loop Electric energy in major loop is first converted to thermal energy by the heating element of connection, then passes through temperature-difference power generation module again for heating element Generated thermal energy is converted to the electric energy that uses of power supply submodule, such mode can be known as indirect heating system, accordingly with One or more heating elements of major loop electrical connection can be referred to as indirect heating module.
The direct heating module and indirect heating module can be used alone and can also be used in mixed way, specifically can be according to reality The selection of border situation.As shown in figure 3, indirect heating module is used alone in the power module, and power module shown in Fig. 4 then mixes Direct heating module and indirect heating module are used.
For the ease of public understanding, to carry out technical solution of the present invention below by a specific embodiment further detailed It describes in detail bright:
The dc circuit breaker of the present embodiment is as shown in Figure 5, comprising: by power supply side terminal 11, static contact 12, moving contact 13 is born The breaker major loop 1 that side terminal 14 is constituted is carried, the contact separation or contact for driving the dynamic and static contact of breaker are with reality The operating mechanism 5 of existing separating brake or combined floodgate, for generating electric arc between extinguishing fracture when the contact of the dynamic and static contact of breaker is opened Arc-chutes 4, the electronic module 3 for detecting breaker working condition and being controlled breaker;As shown in figure 5, the direct current Breaker further includes being set in major loop 1, generates the heating module 6, Yi Jicong of heat by electric current in breaker work Heat is collected in heating module 6, the temperature-difference power generation module 2 of induced voltage is generated using the temperature difference, the electronic module 3 is being run When powered by temperature-difference power generation module 2, and according to detected main circuit current situation to the movement shape of circuit breaker operation mechanism 5 State is controlled.Electronic module 3 shown in fig. 5 may be mounted at any position that breaker is not influenced by other components.
Heating module 6 can be the hair connecting in series or in parallel with the busbar of breaker major loop 1 Thermal resistance is also possible to other heating element combining forms.Heating module 6 in the present embodiment is with parallel way and breaker master The busbar in circuit 1 is electrically connected, and is directly contacted to transmit heat to temperature-difference power generation module 2, together with thermo-electric generation mould module 2 When connect with 3 conducting wire of electronic module and to electronic module 3 provide detection signal, electronic module can be according to 6 both ends of heating module Voltage detection signal calculates the current information of major loop, is then controlled according to current information breaker.Heating module 6 In can also increase direct heating module using as auxiliary, using the heat conductive silica gel with Thermal conductivity by one or more Heat-conducting plate is pasted and fixed on the busbar surface of breaker major loop.Fig. 6 shows that heating module is several on busbar Place's preferably installation site, naturally it is also possible to be mounted on any sites of heat generation of breaker major loop 1.
As shown in fig. 7, the heat generated by the electric current in the available breaker major loop 1 of heating module 6, heat is passed It is handed to the hot end heat transfer sheet 21 of temperature-difference power generation module, under 23 collective effect of cold end cooling fin, using thermoelectric power generation principle, makes temperature Poor power generation sheet 22 generates induced voltage, in the case where the cool and heat ends of temperature-difference power generation module 2 deposit the stable temperature difference, thermoelectric generation film Stable voltage drop is generated between 22 inlet wire and outlet, being connected to electronic module 3 by conducting wire can be used as power supply electricity Can, increase electronic module 3 (can also by DC voltage regulator circuit according to the actual situation so that power supply by induced voltage powered operation The voltage of module output preferably meets the needs of electronic module 3), the control module in electronic module 3 receives in heating module 6 The electric signal of outflow, current status in monitoring breaker major loop, is thus monitored judgement to breaker working condition.
Operating mechanism 5 is controlled by the control module of electronic module 3, and improper telecommunications is detected in breaker major loop 1 Number when drive the dynamic and static contact of breaker contact separation, make breaker major loop 1 open, breaker open operation.
Energy-storage module in electronic module 3 stores electric energy when temperature-difference power generation module 2 works normally, main circuit current compared with It is small be not enough to supply or stop supply when, be switched to release energy state, electronic module 3 be powered.

Claims (6)

1. a kind of dc circuit breaker, including for detect and according to testing result control breaker to main circuit current The electronic module of system, and for providing the power module of power supply for the electronic module;It is characterized in that, the power module Including the heating module for obtaining thermal energy from the major loop, and will be acquired in heating module using temperature difference heat electricity generating principle Thermal energy is converted to the temperature-difference power generation module of electric energy needed for electronic module.
2. dc circuit breaker as described in claim 1, which is characterized in that the heating module include direct heating module and/or Indirect heating module;The direct heating module directly extracts thermal energy produced by major loop;The indirect heating module by with Electric energy in major loop is converted to thermal energy by the heating element of major loop electrical connection.
3. dc circuit breaker as claimed in claim 2, which is characterized in that the direct heating module includes at least a piece of is fixed on The heat-conducting plate on the terminal block surface of the breaker.
4. dc circuit breaker as claimed in claim 3, which is characterized in that the heat-conducting plate is fixed on described disconnected by heat conductive silica gel The terminal block surface of road device.
5. dc circuit breaker as described in claim 1, which is characterized in that the temperature-difference power generation module includes at least one temperature difference hair Motor, the thermoelectric generator include hot end heat transfer sheet, cold end cooling fin and be close to be fixed on the hot end heat transfer sheet with it is cold Hold the thermoelectric generation film between cooling fin.
6. dc circuit breaker as described in claim 1, which is characterized in that the electronic module further includes energy-storage module.
CN201910369938.3A 2019-05-06 2019-05-06 A kind of dc circuit breaker Pending CN109962444A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910369938.3A CN109962444A (en) 2019-05-06 2019-05-06 A kind of dc circuit breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910369938.3A CN109962444A (en) 2019-05-06 2019-05-06 A kind of dc circuit breaker

Publications (1)

Publication Number Publication Date
CN109962444A true CN109962444A (en) 2019-07-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910369938.3A Pending CN109962444A (en) 2019-05-06 2019-05-06 A kind of dc circuit breaker

Country Status (1)

Country Link
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102928105A (en) * 2012-10-18 2013-02-13 西安交通大学 Device and method for measuring temperature of circuit breaker contact
CN104247262A (en) * 2012-03-01 2014-12-24 阿尔斯通技术有限公司 High voltage dc circuit breaker apparatus
CN105027372A (en) * 2013-03-06 2015-11-04 伊顿公司 Display unit configured to display trip information and circuit interrupter including the same
EP3337006A1 (en) * 2016-12-19 2018-06-20 Eaton Industries (Austria) GmbH Switching unit with secondary power supply
CN209709660U (en) * 2019-05-06 2019-11-29 常熟开关制造有限公司(原常熟开关厂) A kind of dc circuit breaker

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104247262A (en) * 2012-03-01 2014-12-24 阿尔斯通技术有限公司 High voltage dc circuit breaker apparatus
CN102928105A (en) * 2012-10-18 2013-02-13 西安交通大学 Device and method for measuring temperature of circuit breaker contact
CN105027372A (en) * 2013-03-06 2015-11-04 伊顿公司 Display unit configured to display trip information and circuit interrupter including the same
EP3337006A1 (en) * 2016-12-19 2018-06-20 Eaton Industries (Austria) GmbH Switching unit with secondary power supply
CN209709660U (en) * 2019-05-06 2019-11-29 常熟开关制造有限公司(原常熟开关厂) A kind of dc circuit breaker

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