CN103701141B - Novel multifunctional encoder switch - Google Patents
Novel multifunctional encoder switch Download PDFInfo
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- CN103701141B CN103701141B CN201410008838.5A CN201410008838A CN103701141B CN 103701141 B CN103701141 B CN 103701141B CN 201410008838 A CN201410008838 A CN 201410008838A CN 103701141 B CN103701141 B CN 103701141B
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- latching relay
- magnetic latching
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The present invention discloses a kind of novel multifunctional encoder switch, comprise main control MCU, magnetic latching relay, magnetic latching relay for subsequent use, working power module, data storage, temperature collect module, LED light display module, 485 communication modules, exchange acquisition module, current transformer, voltage transformer and switch driving circuit, its feature is described working power module, data storage, temperature collect module, LED light display module is connected with main control MCU respectively with 485 communication modules, main control MCU connects magnetic latching relay by a switch driving circuit, main control MCU connects magnetic latching relay for subsequent use by another switch driving circuit, main control MCU is connected with current transformer and voltage transformer respectively by exchanging acquisition module.Calculate operating passing zero moment point fast with single-chip microcomputer, ensure that magnetic latching relay carrys out the operating passing zero of control capacitor, solve the phenomenon that damaging and burning easily appears in controllable silicon.
Description
Technical field
The present invention relates to a kind of switch, particularly relate to a kind of novel multifunctional encoder switch.
Background technology
The fling-cut switch of capacitor and combination switch in power industry mesolow the complete sets of equipment, adopt controllable silicon and magnetic latching relay due to combination switch and connect, realize voltage zero-cross conducting and current over-zero cut-out, make combination switch have the advantage of reverse-blocking tetrode thyristor operating passing zero in the moment switched on and off.Its implementation is: be in voltage zero-cross moment controllable silicon first zero cross fired during input, and then by magnetic latching relay adhesive conducting; And be first magnetic latching relay is disconnected when excising, controllable silicon delay zero-crossing disconnects, thus realizes current over-zero excision.Therefore combination switch to the electric property of magnetic latching relay and technological requirement quite high.And existing magnetic latching relay on the market also fails to reach corresponding requirement, because erosion phenomenon is inhaled in the low easy appearance of magnetic latching relay contact capacity, the mechanical structure of magnetic latching relay determines the unsteadiness of its action simultaneously; Controllable silicon belongs to power type semiconductor element, harsh to electric current and voltage conditional request when using, and occurs that larger fluctuation causes controllable silicon damage or burn phenomenon once electric current and voltage; Therefore existing combination switch is on the market caused also to there is the inadequate natural endowment of application aspect.The present invention be directed to inadequate natural endowment and the up-to-date scientific and technological achievement of one meticulously developed that controllable silicon and magnetic latching relay exist in low-voltage complete application of installation.
Summary of the invention
The object of the invention is to, for the problem of above-mentioned discovery, a kind of novel multifunctional encoder switch is provided, achieve and calculate operating passing zero moment point fast with single-chip microcomputer, ensure that magnetic latching relay carrys out the operating passing zero of control capacitor, replace traditional employing controllable silicon and magnetic latching relay and connect as operating passing zero, solving the phenomenon that damaging and burning easily appears in controllable silicon.Namely it can monitor the input current value of power capacitor, and the utilance of capacitor is guaranteed in the capacitance loss of real-time report capacitor.
The present invention also can Real-time Collection capacitor run time temperature value, when temperature over-range, exit by force capacitor drop into; Again can the current value of Real-time Collection when capacitor drops into, when current value exceeds electric capacity rated current 2 times, exit electric capacity by force and drop into; Can also when excising electric capacity, the current value of each switching channels of Real-Time Monitoring, under the malfunction judging magnetic latching relay adhesive, disconnect magnetic latching relay for subsequent use by force, capacitor is avoided to be in input state for a long time, that one has high security, the novel multifunctional encoder switch of high reliability.
Object of the present invention can be achieved like this, described novel multifunctional encoder switch, comprise main control MCU, magnetic latching relay, magnetic latching relay for subsequent use, working power module, data storage, temperature collect module, exchange acquisition module, current transformer, voltage transformer and switch driving circuit, it is characterized in that, described working power module, data storage is connected with main control MCU respectively with temperature collect module, main control MCU connects magnetic latching relay by a switch driving circuit, main control MCU connects magnetic latching relay for subsequent use by another switch driving circuit, main control MCU is connected with current transformer and voltage transformer respectively by exchanging acquisition module.
Object of the present invention can be achieved like this, described novel multifunctional encoder switch, comprise main control MCU, magnetic latching relay, magnetic latching relay for subsequent use, working power module, data storage, 485 communication modules, exchange acquisition module, current transformer, voltage transformer and switch driving circuit, it is characterized in that, described working power module, data storage is connected with main control MCU respectively with 485 communication modules, main control MCU connects magnetic latching relay by a switch driving circuit, main control MCU connects magnetic latching relay for subsequent use by another switch driving circuit, main control MCU is connected with current transformer and voltage transformer respectively by exchanging acquisition module.
Object of the present invention can be achieved like this, described novel multifunctional encoder switch, comprise main control MCU, magnetic latching relay, working power module, data storage, temperature collect module, 485 communication modules, exchange acquisition module, current transformer, voltage transformer and switch driving circuit, it is characterized in that, described working power module, data storage, temperature collect module is connected with main control MCU respectively with 485 communication modules, main control MCU connects magnetic latching relay by switch driving circuit, main control MCU is connected with current transformer and voltage transformer respectively by exchanging acquisition module.
Object of the present invention can be achieved like this, described novel multifunctional encoder switch, comprise main control MCU, magnetic latching relay, magnetic latching relay for subsequent use, working power module, data storage, temperature collect module, LED light display module, 485 communication modules, exchange acquisition module, current transformer, voltage transformer and switch driving circuit, it is characterized in that, described working power module, data storage, temperature collect module, LED light display module is connected with main control MCU respectively with 485 communication modules, main control MCU connects magnetic latching relay by a switch driving circuit, main control MCU connects magnetic latching relay for subsequent use by another switch driving circuit, main control MCU is connected with current transformer and voltage transformer respectively by exchanging acquisition module.
The operating passing zero method of novel multifunctional encoder switch of the present invention, comprise the steps: 1) by the A line of three-phase and four-line, B line, C line, when N line and capacitor access on the corresponding binding post of the arbitrary described novel multifunctional encoder switch of claim 1-4 respectively, exchange acquisition module Real-time Collection line voltage distribution, electric current and capacitor service data signal, by sending into electric energy computation chip after the conditioning of its signal processing circuit, main control MCU controls electric energy computation chip by SPI communication bus and does accurate analog digital translation and calculating to this signal, to obtain phase voltage, line voltage, capacitance voltage, drop into current information, pass through SPI communication bus again by phase voltage, line voltage, capacitance voltage, drop into current information timing and send main control MCU to, main control MCU sends logic control signal calculating suitable Switching Strategy by I/O mouth, the control signal having and drive magnetic latching relay Motor ability is converted to through switch driving circuit, drive the magnetic latching relay break-make of respective channel, 2) disconnection and the closing stroke time of each magnetic latching relay will accurately be calculated by main control MCU, and be stored in data storage, when exchanging acquisition module and voltage over zero moment Ta being detected and need closed magnetic latching relay, the constant △ t that main control MCU calling data memory stores
1with variable T
1as the calculating parameter of closed magnetic latching relay, the moment point calculated when now detecting that voltage zero-cross drops into is T
1=Ta+10-△ t
1, in formula: magnetic latching relay closing stroke time △ t
1=t
2-t
1, control close command driving switch drive circuit closed magnetic latching relay when main control MCU sends, data storage stores main control MCU and sends the moment point t controlling close command in this process
1, data storage stores magnetic latching relay closing moment point t
2, Ta is the moment point of the voltage zero-cross detected first, main control MCU will control at T
1the close command switch driving circuit sending magnetic latching relay during the moment carries out closed action, when exchanging acquisition module and current zero-crossing point moment Tb detected and needing to disconnect magnetic latching relay, the constant △ t that main control MCU calling data memory stores
2with variable T
2as disconnecting the calculating parameter of magnetic latching relay, the moment point calculated when now detecting that voltage zero-cross disconnects is T
2=Tb+10-△ t
2, in formula: the journey time △ t that magnetic latching relay disconnects
2=t
4-t
3, control open command driving switch drive circuit disconnection magnetic latching relay when main control MCU sends, data storage stores main control MCU and sends the moment point t controlling open command in this process
3, data storage stores magnetic latching relay and disconnects moment point t
4, Tb is the moment point of the current over-zero detected first, main control MCU will control at T
2the open command switch driving circuit sending magnetic latching relay during the moment carries out disconnection action.
Described main control MCU sends control signal according to the actual closed situation with disconnecting of magnetic latching relay by I/O mouth, through the show state of LED light display module control circui LED light, comes indicating operating status and capacitor switching state.
After described interchange acquisition module is connected to 1 ~ n current transformer and 1 ~ n voltage transformer, phase voltage, the line voltage of 1 ~ n current transformer and 1 ~ n voltage transformer Real-time Collection circuit, capacitance voltage and the switching current information of capacitor feed back to main control MCU, by these information gathered, calculate the loss β=Q after capacitor actual motion
c/ Q
c1, in formula: Q
cand Q
c1calculate in the steps below, when the capacitance voltage through exchanging acquisition module collection is U, line voltage is U
aB, U
bC, U
cA, capacitor switching electric current I
aB, I
bC, I
cAtime, calculate the input capacity Q of electric capacity reality
c=U
aB× I
aB+ U
bC× I
bC+ U
cA× I
cA, there is not input amount Q during loss in capacitor
c1=Qe × (U/Ue)
2, wherein: be the capacitance voltage gathered, Ue is the rated voltage of power capacitor.
When the present invention is provided with magnetic latching relay for subsequent use, described magnetic latching relay for subsequent use is in normally off, and the switching of capacitor is realized by the break-make of control magnetic latching relay; 1) when the temperature value of temperature collect module Real-time Collection capacitor exceeds preset parameter, logic control signal is sent by I/O mouth after main control MCU com-parison and analysis, be converted to through switch driving circuit in the control signal with driving 1 ~ n magnetic latching relay Motor ability for subsequent use, disconnect 1 ~ n magnetic latching relay for subsequent use by force, prevent capacitor temperature too high, occur faults such as bursting or burn; 2) when when the capacitor exchanging the 1 ~ n current transformer Real-time Collection in acquisition module drops into, current value exceeds 2 times, rated capacitor electric current, logic control signal is sent by I/O mouth after main control MCU com-parison and analysis, be converted to through switch driving circuit in the control signal with driving 1 ~ n magnetic latching relay Motor ability for subsequent use, disconnect 1 ~ n magnetic latching relay for subsequent use by force, the action message of protection 1 ~ n magnetic latching relay; 3) when equipment excision capacitor, exchange the current value of each switching channels of 1 ~ n current transformer Real-Time Monitoring in acquisition module, if when also there is current value when dropping into, namely judge that the fault of adhesive appears in 1 ~ n magnetic latching relay, now main control MCU sends logic control signal by I/O mouth, be converted in the control signal with driving 1 ~ n magnetic latching relay Motor ability for subsequent use through switch driving circuit, disconnect 1 ~ n magnetic latching relay for subsequent use by force and avoid capacitor to be in input state for a long time.
Further comprises multiple (1 ~ n) magnetic latching relay, multiple (1 ~ n) magnetic latching relay for subsequent use, switch driving circuit, working power module, data storage, temperature collect module, LED light display module, 485 communication modules in structure of the present invention, exchange acquisition module, multiple (1 ~ n) current transformer, multiple (1 ~ n) voltage transformer and switch driving circuit.Described multiple (1 ~ n) magnetic latching relay is the fling-cut switch as capacitor under drive circuit controls, described multiple (1 ~ n) magnetic latching relay for subsequent use uses as protection switch, when electric capacity excises, the current value of each switching channels of Real-Time Monitoring, judging under the malfunction being used for the magnetic latching relay adhesive that switching uses, disconnect magnetic latching relay for subsequent use by force, capacitor is avoided to be in input state for a long time, proterctive equipment reliability service, described working power module is inputted as power supply by alternating current 220V, converts a multi-channel DC voltage supply circuit module to use through power module, described data storage be for various in real time and history data store, described temperature collect module is the temperature value gathering capacitor self, when temperature over-range, exits electric capacity by force and drops into, whether described LED light display module comprises working power and switching signal lamp, can observe novel multifunctional encoder switch of the present invention normally work and capacitor switching situation by indicator light, 485 described communication modules are for the data communication and information exchange with external control appliance, described interchange acquisition module comprises electric energy computation chip and signal processing circuit, electric energy computation chip adopts high-precision AD chip, high-precision AD chip uses as electric current and voltage metering, the effect of signal processing circuit is that the electric current and voltage information of input is nursed one's health into the signal that can do accurate analog digital translation and calculating in high-precision AD chip, send result timing to main control MCU again, mainly gather electric current, phase voltage, line voltage, condenser voltage, electric capacity drops into the data parameters such as electric current for judging that voltage zero-cross input and current over-zero disconnect and condenser loss calculation of parameter, described multiple (1 ~ n) current transformer is the electric current for gathering when electric capacity drops into, and when current value exceeds electric capacity rated current 2 times, exit electric capacity by force and drop into, the electric current simultaneously dropped into also can as of a calculable capacitor loss parameter, described multiple (1 ~ n) voltage transformer is can as the foundation judging voltage zero-cross and calculable capacitor loss for gathering the parameters such as phase voltage, line voltage, condenser voltage.
advantage of the present invention:
The present invention is when normal power-up is run, main control MCU is when to control magnetic latching relay first and carry out switching action, main control MCU can record the moment point that magnetic latching relay really closes in the moment point and magnetic latching relay that send closed or open command or disconnects accurately, and calculates the journey time of magnetic latching relay when closing and disconnect.Because the switching journey time of each magnetic latching relay is different, adopt computational methods of the present invention, can according to the switching journey time of different magnetic latching relay, main control MCU calculates and sends drive singal in advance, so that magnetic latching relay can at correct moment regular event.
Novel multifunctional encoder switch of the present invention, can by the temperature value of temperature collect module Real-time Collection capacitor, when the temperature value gathered exceeds preset parameter (parameter can according to actual motion ambient As), magnetic latching relay for subsequent use in novel multifunctional encoder switch of the present invention disconnects by force, prevent capacitor temperature too high, cause capacitor to occur faults such as bursting or burn.
Novel multifunctional encoder switch of the present invention; can by multiple (1 ~ n) current transformer and the current value exchanged when acquisition module Real-time Collection capacitor drops into; when current value exceeds electric capacity rated current 2 times; magnetic latching relay for subsequent use in novel multifunctional encoder switch of the present invention disconnects by force; exit electric capacity by force to drop into, proterctive equipment reliability service.
Novel multifunctional encoder switch of the present invention, can when excising electric capacity, the current value of each switching channels of Real-Time Monitoring, under the malfunction judging magnetic latching relay adhesive, magnetic latching relay for subsequent use in novel multifunctional encoder switch of the present invention disconnects by force, avoids electric capacity to be in input state for a long time.
Accompanying drawing explanation
Fig. 1 is the structure chart of the novel multifunctional encoder switch of the embodiment of the present invention.
Fig. 1-1 is the schematic block circuit diagram not having installation 485 communication module in Fig. 1.
Fig. 1-2 is the schematic block circuit diagram of not installing temperature collect module in Fig. 1.
Fig. 1-3 is the schematic block circuit diagram of not installing magnetic latching relay for subsequent use in Fig. 1.
Fig. 2 is that the voltage zero-cross of the novel multifunctional encoder switch of the embodiment of the present invention closes and travel-time curve figure.
Fig. 3 is that the current over-zero of the novel multifunctional encoder switch of the embodiment of the present invention disconnects and travel-time curve figure.
Fig. 4 is the operation principle block diagram of the novel multifunctional encoder switch of the embodiment of the present invention.
Fig. 5 is the protective circuit operation principle block diagram of the novel multifunctional encoder switch of the embodiment of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the operation principle of novel multifunctional encoder switch of the present invention and the course of work are described in detail:
As shown in Figure 1, be the structure chart of novel multifunctional encoder switch of embodiment of the present invention.Comprise main control MCU, multiple (can be 1 ~ n) magnetic latching relay, multiple (can be 1 ~ n) magnetic latching relay for subsequent use, working power module, data storage, temperature collect module, LED light display module, 485 communication modules, exchange acquisition module, multiple (can be 1 ~ n) current transformer, multiple (can be 1 ~ n) voltage transformer, switch driving circuit.N of the present invention is natural number.Described working power module, data storage, temperature collect module, LED light display module are connected with main control MCU respectively with 485 communication modules, main control MCU connects magnetic latching relay by a switch driving circuit, main control MCU connects magnetic latching relay for subsequent use by another switch driving circuit, and main control MCU is connected with current transformer and voltage transformer respectively by exchanging acquisition module.When the present invention applies as shown in Figure 5, magnetic latching relay for subsequent use receives A line, B line, C line, N line on the one hand, and be connected with magnetic latching relay on the other hand, magnetic latching relay is received on power capacitor.The following capacitor of the present invention refers to " power capacitor ".
1) main control MCU: adopt existing commercially available prod as single-chip microcomputer etc., completes transmission and controls and send control signal to drive magnetic latching relay to carry out switching action, and these calibration analytes and calculation procedure are that those skilled in the art can realize.
2) multiple (1 ~ n) magnetic latching relay: adopt existing commercially available prod, as the switching element of capacitor in power industry mesolow the complete sets of equipment.
3) multiple (1 ~ n) magnetic latching relay for subsequent use: adopt existing commercially available prod, serve as a kind of switch element, under the malfunction judging magnetic latching relay adhesive, magnetic latching relay for subsequent use in novel multifunctional encoder switch of the present invention disconnects by force, electric capacity is avoided to be in input state for a long time, for those skilled in the art can realize.
4) working power module: alternating current 220V inputs as power supply, convert a multi-channel DC voltage supply circuit module to through power module to use, wherein main control MCU, data storage, 485 communication module working powers are 3.3V direct voltage, exchanging acquisition module operating voltage is 5V, and fling-cut switch control module operating voltage is 12V.These working power modules are that those skilled in the art can realize.
5) data storage: this module to various in real time and history data store, can adopt all kinds of storage medium, be prior art.
6) temperature collect module: adopt commercially available pt100 platinum resistance, the external capacitor surface that is directly placed in can change by response temperature fast, and described pt100 platinum resistance is existing commercially available prod.
7) LED light display module: comprise working power and switching signal lamp, the content of indicator light display comprises operating state and the capacitor switching state of novel multifunctional encoder switch of the present invention.
8) 485 communication modules: this module carries out data communication and information exchange to external control appliance, is prior art.
9) acquisition module is exchanged: comprise electric energy computation chip and signal processing circuit, electric energy computation chip adopts high-precision AD chip, high-precision AD chip uses as electric current and voltage metering, the effect of signal processing circuit is that the electric current and voltage information of input is nursed one's health into the signal that can do accurate analog digital translation and calculating in high-precision AD chip, send result timing to main control MCU, for those skilled in the art can realize again.
10) multiple (1 ~ n) current transformer: adopt existing commercially available prod, for gathering electric current when electric capacity drops into, line current, phase current etc.
11) multiple (1 ~ n) voltage transformer: adopt existing commercially available prod, can as the foundation judging voltage zero-cross and calculable capacitor loss for gathering the parameters such as phase voltage, line voltage, condenser voltage.
12) switch driving circuit: this module is general switching circuit, when main control MCU sends control signal instruction, there is provided the direct voltage supply switching circuit of 12V to use through working power module, switching circuit is closed, and these switching circuits are that those skilled in the art can realize.
As Figure 1-1, be the schematic block circuit diagram not having installation 485 communication module in Fig. 1.The present invention can not install 485 communication modules, now structure of the present invention does not just have 485 communication module functions, but the present invention can also realize object of the present invention, just not by transmitted data on network.
As shown in Figure 1-2, be the schematic block circuit diagram of not installing temperature collect module in Fig. 1.The present invention can not install temperature collect module, now structure of the present invention does not just have temperature collect module function, but the present invention can also realize object of the present invention, just not there is temperature alarming function and prevent capacitor temperature too high, occurring faults such as bursting or burn.
As Figure 1-3, be the schematic block circuit diagram of not installing magnetic latching relay for subsequent use in Fig. 1.The present invention can uneasy equipment magnetic latching relay, now structure of the present invention does not just have magnetic latching relay function for subsequent use, but the present invention can also realize object of the present invention, just do not have and disconnect multiple (1 ~ n) magnetic latching relay for subsequent use by force, prevent capacitor temperature too high, occur the function of faults such as bursting or burn.
As shown in Figure 2 be the voltage zero-cross of the novel multifunctional encoder switch of the embodiment of the present invention closed and travel-time curve figure, wherein t
1for the moment point of the close command that main control MCU sends first, t
2for drive circuit of magnetic latching relay receives the moment point that close command and magnetic latching relay really close, △ t
1for the journey time (unit ms) that magnetic latching relay is closed, Ta is the moment point of the voltage zero-cross detected first, cycle due to power frequency AC is 20ms, in a power frequency period, supply voltage zero passage there will be 2 zero-acrross ing moment, therefore Ta+10 is the moment point (unit ms) of the voltage zero-cross that second time detects, T
1for second time detects voltage zero-cross moment point, namely main control MCU sends the moment point of the close command of magnetic latching relay.
As shown in Figure 3 be the novel multifunctional encoder switch of the embodiment of the present invention current over-zero disconnect and travel-time curve figure, wherein t
3for the moment point of the open command that main control MCU sends first, t
4for drive circuit of magnetic latching relay receives the moment point that open command and magnetic latching relay really disconnect, △ t
2for the journey time (unit ms) that magnetic latching relay disconnects, Tb is the moment point of the current over-zero detected first, cycle due to power frequency AC is 20ms, in a power frequency period, source current zero passage there will be 2 zero-acrross ing moment, Tb+10 is the moment point (unit ms) of the current over-zero that second time detects, T
2during for current over-zero being detected for the second time, main control MCU sends the moment point of the open command of magnetic latching relay.
Shown in composition graphs 1, Fig. 2, Fig. 3, in order to calculate the closed journey time of magnetic latching relay and △ t
1, magnetic latching relay disconnect journey time and △ t
2, main control MCU sends the close command moment point T of magnetic latching relay
1and main control MCU sends the moment point T of the open command of magnetic latching relay
2.If main control MCU sends control close command driving switch drive circuit closed magnetic latching relay, data storage stores main control MCU and sends the moment point t controlling close command in this process
1, data storage stores magnetic latching relay closing moment point t
2.When data storage has stored t
1and t
2after, the journey time that the magnetic latching relay that main control MCU calculates is closed and △ t
1=t
2-t
1, the journey time △ t that the magnetic latching relay that now data storage continuation storage main control MCU calculates is closed
1.After interchange acquisition module detects first time voltage zero-cross moment point Ta, main control MCU starts to calculate the close command moment point T sending magnetic latching relay
1=Ta+10-△ t
1, main control MCU controls at T
1the close command sending magnetic latching relay during the moment drives electrical apparatus driving circuit to carry out closed action, guarantees that magnetic latching relay is at this moment point operating passing zero of Ta+10.Data storage storage of constant △ t
1with variable T
1as the calculating parameter of closed magnetic latching relay, to use when novel multifunctional encoder switch of the present invention carries out closed magnetic latching relay.If main control MCU sends control open command driving switch drive circuit disconnection magnetic latching relay, data storage stores main control MCU and sends the moment point t controlling open command in this process
3, data storage stores magnetic latching relay and disconnects moment point t
4.When data storage has stored t
3and t
4after, the journey time that the magnetic latching relay that main control MCU calculates disconnects and △ t
2=t
4-t
3, now data storage continues the journey time △ t storing the magnetic latching relay disconnection that main control MCU calculates
2.After interchange acquisition module detects first time current over-zero moment point Tb, main control MCU starts to calculate the open command moment point T sending magnetic latching relay
2=Tb+10-△ t
2, main control MCU controls at T
2the open command sending magnetic latching relay during the moment drives electrical apparatus driving circuit to carry out disconnection action, guarantees that magnetic latching relay is at this moment point operating passing zero of Tb+10.Data storage storage of constant △ t
2with variable T
2as the calculating parameter disconnecting magnetic latching relay, to use when novel multifunctional encoder switch of the present invention carries out disconnection magnetic latching relay.
When the interchange acquisition module in novel multifunctional encoder switch of the present invention detects voltage over zero moment Ta and needs closed magnetic latching relay, the constant △ t that main control MCU calling data memory stores
1with variable T
1as the calculating parameter of closed magnetic latching relay, the moment point calculated when now detecting that voltage zero-cross drops into is T
1=Ta+10-△ t
1, main control MCU will control at T
1the close command sending magnetic latching relay during the moment drives electrical apparatus driving circuit to carry out closed action.When exchanging acquisition module and current zero-crossing point moment Tb detected and needing to disconnect magnetic latching relay, the constant △ t that main control MCU calling data memory stores
2with variable T
2as disconnecting the calculating parameter of magnetic latching relay, the moment point calculated when now detecting that voltage zero-cross disconnects is T
2=Tb+10-△ t
2.Main control MCU will control at T
2the open command sending magnetic latching relay during the moment drives electrical apparatus driving circuit to carry out disconnection action.
As shown in Figure 4, be the operation principle block diagram of novel multifunctional encoder switch of embodiment of the present invention.Wherein A line, B line, C line, N line are connected to novel multifunctional encoder switch A, B, C, N port of the present invention respectively by copper conductor, the alternating current 220V of collection inputs as power supply by working power module, convert a multi-channel DC voltage supply circuit module to through power module to use, wherein main control MCU, data storage, 485 communication module working powers are 3.3V direct voltage, exchanging acquisition module working power is 5V direct voltage, and fling-cut switch control module working power is 12V direct voltage.
As shown in Figure 5; it is the protective circuit operation principle block diagram of the novel multifunctional encoder switch of embodiment of the present invention; in order to ensure the reliable and secure operation of equipment; in order to strengthen the useful life of power capacitor, novel multifunctional encoder switch of the present invention adds multiple (1 ~ n) magnetic latching relay for subsequent use and uses as protection switch.When novel multifunctional encoder switch of the present invention normally works, multiple (1 ~ n) magnetic latching relay for subsequent use is in normally off, and the switching of capacitor is the break-make realization by controlling multiple (1 ~ n) magnetic latching relay.When the temperature value of temperature collect module Real-time Collection capacitor exceeds preset parameter (parameter can according to actual motion ambient As), logic control signal is sent by I/O mouth after main control MCU com-parison and analysis, be converted to through switch driving circuit in the control signal having and drive multiple (1 ~ n) magnetic latching relay Motor ability for subsequent use, disconnect multiple (1 ~ n) magnetic latching relay for subsequent use by force, prevent capacitor temperature too high, occur faults such as bursting or burn.When the capacitor exchanging multiple (1 ~ n) current transformer Real-time Collection in acquisition module drops into, current value exceeds 2 times, rated capacitor electric current; logic control signal is sent by I/O mouth after main control MCU com-parison and analysis; be converted to through switch driving circuit in the control signal having and drive multiple (1 ~ n) magnetic latching relay Motor ability for subsequent use; disconnect multiple (1 ~ n) magnetic latching relay for subsequent use by force, protect the action message of multiple (1 ~ n) magnetic latching relay.When equipment excision electric capacity, exchange the current value of each switching channels of multiple (1 ~ n) current transformer Real-Time Monitoring in acquisition module, if when also there is current value when dropping into, namely judge that the fault of adhesive appears in multiple (1 ~ n) magnetic latching relay, now main control MCU sends logic control signal by I/O mouth, be converted in the control signal having and drive multiple (1 ~ n) magnetic latching relay Motor ability for subsequent use through switch driving circuit, disconnect multiple (1 ~ n) magnetic latching relay for subsequent use by force and avoid capacitor to be in input state for a long time.Therefore being used as protection switch by increasing multiple (1 ~ n) magnetic latching relay for subsequent use, the fail safe of novel multifunctional encoder switch of the present invention operation, reliability can be improved.
Composition graphs 4, shown in Fig. 5, when A line, B line, C line, when N line and capacitor access on the corresponding binding post of novel multifunctional encoder switch of the present invention respectively, the interchange acquisition module Real-time Collection line voltage distribution in novel multifunctional encoder switch of the present invention, electric current and capacitor service data, by sending into electric energy computation chip after the conditioning of its signal processing circuit, main control MCU controls electric energy computation chip (data acquisition module chip block) by SPI communication bus and does accurate analog digital translation and calculating to this signal, to obtain phase voltage, line voltage, capacitance voltage, drop into the information such as electric current, then by SPI communication bus by phase voltage, line voltage, capacitance voltage, drop into the information timings such as electric current and send main control MCU to, main control MCU sends logic control signal calculating suitable Switching Strategy by I/O mouth, be converted to the control signal having and drive magnetic latching relay Motor ability through switch driving circuit, drive the magnetic latching relay break-make of respective channel.Because the journey time of the closed and disconnected of each magnetic latching relay is different, in order to ensure that magnetic latching relay is accurate in the action moment point of contact, novel multifunctional encoder switch of the present invention will accurately calculate disconnection and the closing stroke time of each magnetic latching relay by main control MCU, and is stored in data storage.When the interchange acquisition module of novel multifunctional encoder switch of the present invention detects voltage over zero moment Ta and needs closed magnetic latching relay, the constant △ t that main control MCU calling data memory stores
1with variable T
1as the calculating parameter of closed magnetic latching relay, the moment point calculated when now detecting that voltage zero-cross drops into is T
1=Ta+10-△ t
1, main control MCU will control at T
1the close command switch driving circuit sending magnetic latching relay during the moment carries out closed action.When exchanging acquisition module and current zero-crossing point moment Tb detected and needing to disconnect magnetic latching relay, the constant △ t that main control MCU calling data memory stores
2with variable T
2as disconnecting the calculating parameter of magnetic latching relay, the moment point calculated when now detecting that voltage zero-cross disconnects is T
2=Tb+10-△ t
2.Main control MCU will control at T
2the open command switch driving circuit sending magnetic latching relay during the moment carries out disconnection action.Main control MCU sends control signal by according to the actual closed situation with disconnecting of magnetic latching relay by I/O mouth simultaneously, through the show state of LED light display module control circui LED light, indicate operating state and the capacitor switching state of novel multifunctional encoder switch of the present invention.The interchange acquisition module of novel multifunctional encoder switch of the present invention is connected to multiple (1 ~ n) current transformer and multiple (1 ~ n) voltage transformer, can phase voltage, the line voltage of Real-time Collection circuit, the information feed back such as the capacitance voltage of capacitor and switching electric current are to main control MCU, by these information gathered, the loss calculated after capacitor actual motion that can think.If the capacitance voltage through exchanging acquisition module collection is U, line voltage is U
aB, U
bC, U
cA, capacitor switching electric current I
aB, I
bC, I
cA, then the input capacity Q of electric capacity reality can be calculated
c=U
aB× I
aB+ U
bC× I
bC+ U
cA× I
cA.Can know according to rated capacitor capacity Qe, there is not input amount Q during loss in capacitor
c1=Qe × (U/Ue)
2, (wherein U is the capacitance voltage gathered, and Ue is the rated voltage of power capacitor), can calculate loss factor β=Q like this
c/ Q
c1.Due to when condenser loss value reaches 1/3, the utilance of capacitor reduces, in the complete sets of equipment, utilize capacitor to decline as the effect compensated, when condenser loss value reaches 2/3, the output current of capacitor strengthens, the caloric value of capacitor is high, and capacitor easily occurs potential safety hazard, therefore has innovation and creation meaning at the loss factor β of sensing capacitor.
Claims (4)
1. an operating passing zero method for multifunctional encoder switch, comprises the steps: 1) by the A line of three-phase and four-line, B line, C line, when N line and capacitor access on the corresponding binding post of multifunctional encoder switch respectively, exchange acquisition module Real-time Collection line voltage distribution, electric current and capacitor service data signal, by sending into electric energy computation chip after the conditioning of its signal processing circuit, main control MCU controls electric energy computation chip to gathered line voltage distribution by SPI communication bus, electric current and capacitor service data signal do accurate analog digital translation and calculating, to obtain phase voltage, line voltage, capacitance voltage, drop into current information, then by SPI communication bus by phase voltage, line voltage, capacitance voltage, drop into current information timing and send main control MCU to, main control MCU sends logic control signal calculating suitable Switching Strategy by I/O mouth, be converted to the control signal having and drive magnetic latching relay Motor ability through switch driving circuit, drive the magnetic latching relay break-make of respective channel, 2) disconnection and the closing stroke time of each magnetic latching relay will accurately be calculated by main control MCU, and be stored in data storage, when exchanging acquisition module and voltage over zero moment Ta being detected and need closed magnetic latching relay, the constant △ t that main control MCU calling data memory stores
1with variable T
1as the calculating parameter of closed magnetic latching relay, the moment point calculated when now detecting that voltage zero-cross drops into is T
1=Ta+10-△ t
1, in formula: magnetic latching relay closing stroke time △ t
1=t
2-t
1, control close command driving switch drive circuit closed magnetic latching relay when main control MCU sends, data storage stores main control MCU and sends the moment point t controlling close command in this process
1, data storage stores magnetic latching relay closing moment point t
2, Ta is the moment point of the voltage zero-cross detected first, main control MCU will control at T
1the close command switch driving circuit sending magnetic latching relay during the moment carries out closed action, when exchanging acquisition module and current zero-crossing point moment Tb detected and needing to disconnect magnetic latching relay, the constant △ t that main control MCU calling data memory stores
2with variable T
2as disconnecting the calculating parameter of magnetic latching relay, the moment point calculated when now detecting that voltage zero-cross disconnects is T
2=Tb+10-△ t
2, in formula: the journey time △ t that magnetic latching relay disconnects
2=t
4-t
3, control open command driving switch drive circuit disconnection magnetic latching relay when main control MCU sends, data storage stores main control MCU and sends the moment point t controlling open command in this process
3, data storage stores magnetic latching relay and disconnects moment point t
4, Tb is the moment point of the current over-zero detected first, main control MCU will control at T
2the open command switch driving circuit sending magnetic latching relay during the moment carries out disconnection action.
2. operating passing zero method according to claim 1, it is characterized in that, main control MCU sends control signal according to the actual closed situation with disconnecting of magnetic latching relay by I/O mouth, through the show state of LED light display module control circui LED light, come indicating operating status and capacitor switching state.
3. operating passing zero method according to claim 1 and 2, it is characterized in that, after described interchange acquisition module is connected to 1 ~ n current transformer and 1 ~ n voltage transformer, phase voltage, the line voltage of 1 ~ n current transformer and 1 ~ n voltage transformer Real-time Collection circuit, capacitance voltage and the switching current information of capacitor feed back to main control MCU, by these information gathered, calculate the loss β=Q after capacitor actual motion
c/ Q
c1, in formula: Q
cand Q
c1calculate in the steps below, when the capacitance voltage through exchanging acquisition module collection is U, line voltage is U
aB, U
bC, U
cA, capacitor switching electric current I
aB, I
bC, I
cAtime, calculate the input capacity Q of electric capacity reality
c=U
aB× I
aB+ U
bC× I
bC+ U
cA× I
cA, there is not input amount Q during loss in capacitor
c1=Qe × (U/Ue)
2, wherein: U is the capacitance voltage gathered, and Ue is the rated voltage of power capacitor, and Qe is the rated capacity of power capacitor.
4. operating passing zero method according to claim 1 and 2, is characterized in that, when being provided with magnetic latching relay for subsequent use, described magnetic latching relay for subsequent use is in normally off, and the switching of capacitor is realized by the break-make of control magnetic latching relay; 1) when the temperature value of temperature collect module Real-time Collection capacitor exceeds preset parameter, logic control signal is sent by I/O mouth after main control MCU com-parison and analysis, be converted to through switch driving circuit in the control signal with driving 1 ~ n magnetic latching relay Motor ability for subsequent use, disconnect 1 ~ n magnetic latching relay for subsequent use by force, prevent capacitor temperature too high, occur explosion or burning fault; 2) when when the capacitor exchanging the 1 ~ n current transformer Real-time Collection in acquisition module drops into, current value exceeds 2 times, rated capacitor electric current, logic control signal is sent by I/O mouth after main control MCU com-parison and analysis, be converted to through switch driving circuit in the control signal with driving 1 ~ n magnetic latching relay Motor ability for subsequent use, disconnect 1 ~ n magnetic latching relay for subsequent use by force, the action message of protection 1 ~ n magnetic latching relay; 3) when equipment excision capacitor, exchange the current value of each switching channels of 1 ~ n current transformer Real-Time Monitoring in acquisition module, if when also there is current value when dropping into, namely judge that the fault of adhesive appears in 1 ~ n magnetic latching relay, now main control MCU sends logic control signal by I/O mouth, be converted in the control signal with driving 1 ~ n magnetic latching relay Motor ability for subsequent use through switch driving circuit, disconnect 1 ~ n magnetic latching relay for subsequent use by force and avoid capacitor to be in input state for a long time.
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| CN104597750B (en) * | 2014-11-28 | 2017-10-24 | 固安华电天仁控制设备有限公司 | A kind of core relay failure detection and redundancy control system and control method |
| CN109509679A (en) * | 2018-11-30 | 2019-03-22 | 上海五零盛同信息科技有限公司 | Relay control system based on zero crossing delays time to control |
| CN113567909A (en) * | 2021-07-22 | 2021-10-29 | 重庆跃腾电器有限公司 | Magnetic latching relay temperature monitoring system on multi-user meter |
| CN114039336B (en) * | 2021-10-21 | 2023-09-19 | 贵州电网有限责任公司 | Integrated relay, control method and relay protection device |
| CN114649152A (en) * | 2022-04-01 | 2022-06-21 | 东莞市信捷安物联科技有限公司 | Zero-crossing opening method |
| CN114826705A (en) * | 2022-04-12 | 2022-07-29 | 国网湖北省电力有限公司信息通信公司 | APT attack determination method and system based on independent component analysis method and storage medium |
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