CN201733105U - Low-voltage intelligent phase-selection switch - Google Patents
Low-voltage intelligent phase-selection switch Download PDFInfo
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- CN201733105U CN201733105U CN2010202791160U CN201020279116U CN201733105U CN 201733105 U CN201733105 U CN 201733105U CN 2010202791160 U CN2010202791160 U CN 2010202791160U CN 201020279116 U CN201020279116 U CN 201020279116U CN 201733105 U CN201733105 U CN 201733105U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The utility model relates to a low-voltage intelligent phase-selection switch comprising a microprocessor, a command input circuit, a signal sampling circuit and a relay output drive circuit, a display circuit and a power supply circuit, wherein after receiving an input command signal and a sampling signal, the microprocessor calculates and processes the input signal, respectively sends relay control signals used for controlling the closing or opening of the low-voltage phase-selection switch at the time when voltage or current at both ends of the phase-selection switch is zero, and outputs a display signal used for displaying the working state of the low-voltage phase-selection switch at real time. The low-voltage intelligent phase-selection switch realizes the inrush current free input of a capacitor and the arc-free breaking of a switch contact, does not cause impact to the capacitor, reduces harmonic pollution, lowers the cost as well as the power consumption of the switch, increases the reliability of the switch and prolongs the service life of the switch.
Description
Technical field
The utility model relates to a kind of switching device, and the low-voltage intelligent phase-selecting switch that uses in especially a kind of electric power system belongs to low-voltage compensation control technology field.
Background technology
Because most load is an inductive in electrical power trans mission/distribution system, its power factor (PF) is lower, and the demand to electric current in the circuit of therefore transmitting electricity is bigger, can cause the efficiency of transmission in the electrical power trans mission/distribution system to reduce like this, and can increase the voltage regulation of load end.For overcoming above problem, method commonly used is to add the capacitor switch device in electrical power trans mission/distribution system, reaches the purpose that improves Circuits System overall power factor.
Present capacitor switch mainly is divided into three major types: a class is traditional contactor class switch, it as application number 200820050810.8 Chinese patent, a kind of " A.C. contactor control switch " disclosed, it comprises first switch and second switch, wherein first switch comprises shell, button, driving key, promotion ratchet, ratchet, touches bridge and end anti-ratchet, but the button opposite shell moves up and down, and between button and the shell back-moving spring is housed; Button is fixedlyed connected with driving key, an end of the fixedly connected promotion ratchet of the sidepiece of driving key; End anti-ratchet one end and be fixed on the shell, be connected with binding post ending on the anti-ratchet; Promote the between cog of ratchet and the other end insertion ratchet that ends anti-ratchet; Ratchet has the conductive region and the insulating regions of space, and the ratchet conductive region connects first contact of second switch, and the described bridge that touches is fixed on the driving key, when button is pressed, touches first contact and second contact that bridging connects second switch.But such switch shoves bigger when switching, is easy to capacitor is formed impact, thereby causes the harmonic pollution of distribution system.Another kind of is electronic switch, it as application number 200620048203.9 Chinese patent, disclose " a kind of thyristor phase-selecting switch experiment device ", it comprises CPU, input/output signal Acquisition Circuit, Switching Power Supply, input/output interface, touch panel communication, host computer communication, CPLD signal processing circuit, thyristor gating circuit, loop of power circuit and thyristor; Thyristor gating circuit triggers thyristor signal is passed to the input signal Acquisition Circuit, after handling through CPU, divides to be clipped to touch panel communication, host computer communication, input/output interface and CPLD signal processing circuit.This class switch mainly adopts the thyristor of big electric current to control switching, but because the thyristor self characteristics causes this switch to have the defective that energy consumption is big and fragile and maintenance difficulties is big in manufacturing cost height, the course of work.Also has a class combination switch, it as application number 200620012581.1 Chinese patent, " a kind of series type composite switch circuit of opening-closing capacitor bank " disclosed, it is with after a high-voltage and current-limitation resistance is connected by a high voltage silicon stack diode, mechanical switch in parallel is as hanging down the high withstand voltage switch of precision at a slow speed; The parallel circuits of a diode and a thyristor is formed the low withstand voltage switch of quick high accuracy and is connected with the high withstand voltage switch of above-mentioned low at a slow speed precision, at a reactor of series connection and a capacitor, the conducting of controller control thyristor ends, the folding of the mechanical switch of controller control simultaneously.As can be seen, still do not break away from use high-power thyristor element in the composite switch circuit of this type, therefore can't overcome the easy impaired defective of switching device yet.
The utility model content
At above-mentioned deficiency of the prior art, main purpose of the present utility model is to solve the problem that capacitor switch shoves greatly, is easy to generate electric arc when disconnecting when closure, further also solved capacitor switch cost height, energy consumption is big and flimsy problem, and provides a kind of low-voltage intelligent phase-selecting switch that capacitor is not had impact, low-power consumption, high life when switching.
The technical solution of the utility model: the low-voltage intelligent phase-selecting switch, it is characterized in that, comprising:
Microprocessor, be used to receive the command signal and the sampled signal of input, and the signal of described input calculated, handles, voltage or electric current at described phase-selecting switch two ends is to send respectively in the zero moment to be used to control the relay control signal that described low pressure phase-selecting switch is closed or open then, and output in real time is used to show the shows signal of described low pressure phase-selecting switch operating state;
The instruction input circuit is used for sending command signal to microprocessor;
Signal sampling circuit is used for the sampled signal to microprocessor feedback external power source;
The relay output driving circuit is used to receive the relay control signal that microprocessor sends, and according to the break-make of described relay control signal control relay group;
Display circuit is used to receive the shows signal that microprocessor sends, and shows by state display lamp;
Power circuit changes into external power source the DC power supply of using for microprocessor and relay output driving circuit.
The operation principle of the utility model phase-selecting switch:
During work, convert the external power source of 220V the DC power supply of 5V and 40V to by power circuit, wherein the 5V DC power supply offers the operating on low voltage circuit based on microprocessor, and the DC power supply of 40V offers the relay output driving circuit; After d. c. voltage signal (as the button inputted signal) isolation processing of instruction input circuit with the outside input, generate TTL fiduciary level signal (being command signal) input microprocessor; Simultaneously, signal sampling circuit converts the sinusoidal signal of the 380V of external power source to standard TTL square wave synchronizing signal (being sampled signal) and input microprocessor by optical coupler.Microprocessor is behind command signal that receives input and sampled signal, by the control program that inside is provided with the data of gathering are analyzed, and to calculate switch ends voltage be that zero moment and electric current are zero the moment, then switch ends voltage be zero moment and electric current be moment of zero respectively the sending filter control signal control to the relay output driving circuit, the relay output driving circuit is carried out closed according to the control signal that receives or is disconnected the operation of relay group.Microprocessor is to be the instruction that zero sends Closing Switch constantly at switch ends voltage when the sending filter control signal, is the instruction that zero sends cut-off switch constantly at the switch ends electric current.When phase-selecting switch of the present utility model is worked, the also real-time transmission of microprocessor is used to represent that the shows signal of switch working state is to display circuit, display circuit shows by the indicator light of different color, with the various states of pointing out switch to be in throwing, to cut and to break down.
Little processing of the present utility model is carried out according to following steps when work: the chip elder generation electrification reset of energising back microprocessor, and the operating state of the real-time sense switch of microprocessor also sends shows signal, and microprocessor resets to relay simultaneously; Microprocessor is in and waits for the instruction input state then, and after the command signal input, microprocessor begins voltage is sampled by signal sampling circuit, and to calculate switch ends voltage be that zero moment and electric current are zero the moment; Little then processing is zero moment sending filter control signal at voltage, the control relay closure; Same, be zero moment sending filter control signal at electric current, control relay disconnects; Through once closed, disconnect the operation of relay after, little processing is returned to waits for the instruction input state.
Further, described instruction input circuit all links to each other with the input of microprocessor by optical coupler with signal sampling circuit, and the output of described microprocessor also is connected with the relay output driving circuit by optical coupler.The utility model all is provided with optical coupler by signal input, the output at microprocessor, can both play the good isolation effect to the signal of telecommunication of importing, export, thereby strengthen the antijamming capability of signal.
With respect to prior art, the utlity model has following advantage:
Phase-selecting switch of the present utility model adopts signal sampling circuit to detect the power source voltage value, and by can be accurately after calculating be that moment of zero is with switch closure in the make and break contact both end voltage, at make and break contact two ends electric current is the zero moment switch to be disconnected, thereby the no-flashy-flow input of capacitor and the no electric arc disjunction of make and break contact have been realized, capacitor is not impacted, reduced harmonic pollution; And in the circuit owing to directly adopted mechanical relay to control break-make, and optimized the circuit structure of relay output driving circuit, greatly reduced cost, also reduced the power consumption of switch and the incidence of fault, improve the reliability of switch, prolonged the useful life of switch.
Description of drawings
Fig. 1 is the circuit structure block diagram of the utility model low-voltage intelligent phase-selecting switch;
Fig. 2 is the circuit theory diagrams of the utility model low-voltage intelligent phase-selecting switch.
Among the figure, 1-microprocessor, 2-instruct input circuit, 3-signal sampling circuit, 4-display circuit, 5-relay output driving circuit, 6-power circuit, 7-relay group.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, a kind of low-voltage intelligent phase-selecting switch, comprise: microprocessor 1, be used to receive the command signal and the sampled signal of input, and the signal of described input calculated, handles, voltage or electric current at described phase-selecting switch two ends is to send respectively in the zero moment to be used to control the relay control signal that described low pressure phase-selecting switch is closed or open then, and output in real time is used to show the shows signal of described low pressure phase-selecting switch operating state;
Relay output driving circuit 5 is used to receive the relay control signal that microprocessor 1 sends, and according to the break-make of described relay control signal control relay group 7;
It is the control chip of AT89C2051 that microprocessor of the present utility model adopts model, it gets up the organic connections of each several part circuit as the control core, and according to the design program carry out work, can discern outside command input signals automatically, accurately control the each several part circuit working, make single unit system as an intelligent switch, and can also handle also output alarm automatically once break down.
Referring to Fig. 1 and Fig. 2, during power circuit 6 work, be that external AC 220V power supply is passed through to insert transformer T2 step-down after capacitor C 3, the inductance T1 filtering, alternating voltage about transformer T2 output 11V offers operating on low voltage circuit (as microprocessor) through the stable+5V of three-terminal voltage-stabilizing pipe U11 output again through the direct voltage about output DC15V behind the rectifier bridge D6; The voltage stabilizing circuit of being made up of triode Q5 and diode D8 is inserted on another road of AC220V after diode D2, capacitor C 13 halfwave rectifier, the voltage after voltage stabilizing is handled about output direct current 40V offers the relay output driving circuit.
Referring to Fig. 1 and Fig. 2, during 2 work of instruction input circuit, be external direct current command signal (5V-24V) to be leant on CN1 through wiring insert, behind polarity discriminating, insert optical coupler U2, the tripod outputting standard high level signal of optical coupler U2 and 19 pin of input microprocessor U1.When external instruction was 0V voltage, optical coupler U2 output low level signal was to 19 pin of microprocessor U1.
Referring to Fig. 1 and Fig. 2, during signal sampling circuit 3 work, be that three phase mains A, B, C are isolated through resistance R 10, R12, R13 input optical coupler U3, U4, U5, voltage after isolating, export synchronizing signal through pin AB, C, Y to microprocessor U1, thereby finish voltage sampling work.
Referring to Fig. 1 and Fig. 2, described display circuit 4 mainly is made up of light-emitting diode D3 (yellow), D4 (redness), D5 (green).When switch is in off-state, the X1 pin output low level of microprocessor U1, light-emitting diode D4 red light is lighted; When microprocessor receives the instruction of Closing Switch and switch when being in normal on-state, the X1 pin output high level of microprocessor U1, light-emitting diode D5 green light is lighted; When if microprocessor U1 detects three phase mains phase shortage, power failure or on off state situation not in place, microprocessor U1 will automatically perform reset relay, and by X2 pin output low level, warning amber light D3 lights and constantly flicker, and the prompting user is broken down.
Referring to Fig. 1 and Fig. 2, described relay output driving circuit 5 comprises the three-phase drive circuit that is used for control relay group 7 break-makes and triode Q1, the Q4 of 2 common emitters; Described three-phase drive circuit comprises optical coupler U8, U9, U10, and controllable silicon Q6, Q7, Q8, Q9, Q10, Q11.
Described three-phase drive circuit be by the A phase of same structure, B mutually and C mutually the drive circuit parallel connection constitute, respectively be connected with a relay (JA, JB, JC) on the drive circuit mutually with C mutually at A phase, B, on the positive and negative electrode of each relay, be connected with a controllable silicon that is used for the Control current break-make respectively, A phase, B mutually and C respectively be provided with one mutually in the drive circuit and be used for outputs level signals and give described silicon controlled optical coupler (U8, U9, U10), described optical coupler links to each other with the signal output part of microprocessor respectively; The collector electrode of described triode Q1 respectively be connected the relay negative pole on the control of controllable silicon (Q6, Q8, Q10) extremely link to each other, the collector electrode of triode Q4 respectively be connected the relay positive pole on the control of controllable silicon (Q7, Q9, Q11) extremely link to each other, the base stage of triode Q1, Q4 links to each other with the status signal output (K, G) of microprocessor by optical coupler (U6, U7) respectively.
Relay output driving circuit operation principle of the present utility model is as follows:
Referring to Fig. 2, here with the example that is controlled to be of A phase drive circuit: at first (1 expression effectively by microprocessor U1 output status signal K or G, but K, G can not be " 1 " simultaneously), when the K set, representation switch closure, optical coupler U6 work, triode Q1 conducting, the A phase control signal S-A of microprocessor U1 output is a high level, optical coupler U8 work, and the 3 pin output high level signal of optical coupler U8 is given controllable silicon Q6 and Q7; Because triode Q1 conducting, thus controllable silicon Q6 be lockable can not conducting, at this moment electric current flows out through triode Q1 ground connection from negative pole through the positive pole that the controllable silicon Q7 of conducting flows to relay J A again.This moment is because the sense of current is consistent with relay J A polarity, so relay J A closure is finished " opening " state.
Otherwise, when the G set, optical coupler U7 work, triode Q4 conducting, the A phase control signal S-A of microprocessor U1 output is a high level, optical coupler U8 work, the 3 pin output high level signal of optical coupler U8 is given controllable silicon Q6 and Q7; Same since controllable silicon Q7 pinned by triode Q4 can not conducting, electric current will flow to the negative pole of relay J A through controllable silicon Q6, flow out through triode Q4 ground connection from positive pole again.This moment, relay J A finished " pass " state with counteragent and disconnection because the sense of current is opposite with the polarity of relay J A.Because B has identical structure with C phase drive circuit with A phase drive circuit mutually, so B is also identical with the operation principle of C phase drive circuit mutually, does not describe in detail at this.
In switching circuit of the present utility model, be the interference that reduces to import, output signal is subjected to, when design, adopted the instruction input circuit all to link to each other with the input of microprocessor, and the output of microprocessor also is connected with the relay output driving circuit by optical coupler by optical coupler with signal sampling circuit.So not only can the good isolation effect can both be played, harmonic pollution can also be reduced, the energy consumption when reducing switch work the signal of telecommunication of input, output.
Claims (3)
1. the low-voltage intelligent phase-selecting switch is characterized in that, comprising:
Microprocessor (1), be used to receive the command signal and the sampled signal of input, and the signal of described input calculated, handles, voltage or electric current at described phase-selecting switch two ends is to send respectively in the zero moment to be used to control the relay control signal that described low pressure phase-selecting switch is closed or open then, and output in real time is used to show the shows signal of described low pressure phase-selecting switch operating state;
Instruction input circuit (2) is used for sending command signal to microprocessor (1);
Signal sampling circuit (3) is used for the sampled signal to microprocessor (1) feedback external power source;
Relay output driving circuit (5) is used to receive the relay control signal that microprocessor (1) sends, and according to the break-make of described relay control signal control relay group (7);
Display circuit (4) is used to receive the shows signal that microprocessor (1) sends, and shows by state display lamp;
Power circuit (6) changes into external power source the DC power supply of using for microprocessor (1) and relay output driving circuit (5).
2. low-voltage intelligent phase-selecting switch according to claim 1, it is characterized in that, described instruction input circuit (2) all links to each other by the input of optical coupler with microprocessor (1) with signal sampling circuit (3), and the output of described microprocessor (1) also is connected with relay output driving circuit (5) by optical coupler.
3. low-voltage intelligent phase-selecting switch according to claim 1 is characterized in that, described relay output driving circuit (5) comprises the three-phase drive circuit that is used for control relay group (7) break-make and triode Q1, the Q4 of 2 common emitters; Described three-phase drive circuit be by the A phase of same structure, B mutually and C mutually the drive circuit parallel connection constitute, respectively be connected with a relay on the drive circuit mutually with C mutually at A phase, B, on the positive and negative electrode of each relay, be connected with a controllable silicon that is used for the Control current break-make respectively, A phase, B mutually and C also respectively be provided with one mutually in the drive circuit and be used for outputs level signals and give described silicon controlled optical coupler, described optical coupler links to each other with the signal output part of microprocessor (1) respectively; The collector electrode of described triode Q1 respectively be connected the relay negative pole on silicon controlled control extremely link to each other, the collector electrode of triode Q4 respectively be connected the relay positive pole on silicon controlled control extremely link to each other, the base stage of triode Q1, Q4 links to each other by the status signal output of optical coupler with microprocessor (1) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202791160U CN201733105U (en) | 2010-08-02 | 2010-08-02 | Low-voltage intelligent phase-selection switch |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010202791160U CN201733105U (en) | 2010-08-02 | 2010-08-02 | Low-voltage intelligent phase-selection switch |
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| CN201733105U true CN201733105U (en) | 2011-02-02 |
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| CN2010202791160U Expired - Fee Related CN201733105U (en) | 2010-08-02 | 2010-08-02 | Low-voltage intelligent phase-selection switch |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103051053A (en) * | 2011-10-13 | 2013-04-17 | 江西光景电力设备有限公司 | Module special for charge control box |
| CN103346578A (en) * | 2013-07-15 | 2013-10-09 | 大连交通大学 | Intelligent phase selection switch controller |
| CN104244523A (en) * | 2014-09-12 | 2014-12-24 | 成都威邦科技有限公司 | Touch type LED spotlight energy-saving system |
| CN104578117A (en) * | 2014-12-31 | 2015-04-29 | 北京中电博达科技有限公司 | Intelligent phase choosing switch based on power line carrier communication and control circuit thereof |
-
2010
- 2010-08-02 CN CN2010202791160U patent/CN201733105U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103051053A (en) * | 2011-10-13 | 2013-04-17 | 江西光景电力设备有限公司 | Module special for charge control box |
| CN103346578A (en) * | 2013-07-15 | 2013-10-09 | 大连交通大学 | Intelligent phase selection switch controller |
| CN104244523A (en) * | 2014-09-12 | 2014-12-24 | 成都威邦科技有限公司 | Touch type LED spotlight energy-saving system |
| CN104244523B (en) * | 2014-09-12 | 2016-06-08 | 国网山东省电力公司定陶县供电公司 | A kind of touch type LED spotlight energy conserving system |
| CN104578117A (en) * | 2014-12-31 | 2015-04-29 | 北京中电博达科技有限公司 | Intelligent phase choosing switch based on power line carrier communication and control circuit thereof |
| CN104578117B (en) * | 2014-12-31 | 2018-02-13 | 北京中电博达科技有限公司 | A kind of intelligent phase-selection switch and its control circuit based on power line carrier, PLC |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110202 Termination date: 20180802 |