CN104734331B - A kind of voltage sample circuit for dual-power transfer switch electrical equipment - Google Patents
A kind of voltage sample circuit for dual-power transfer switch electrical equipment Download PDFInfo
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- CN104734331B CN104734331B CN201510156940.4A CN201510156940A CN104734331B CN 104734331 B CN104734331 B CN 104734331B CN 201510156940 A CN201510156940 A CN 201510156940A CN 104734331 B CN104734331 B CN 104734331B
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Abstract
The invention discloses a kind of voltage sample circuit for dual-power transfer switch electrical equipment, it includes the circuits below module being sequentially connected in series：The capacity voltage dropping circuit module of decompression processing is carried out with power frequency AC, capacity voltage dropping circuit module is exported into the rectification circuit module that low-voltage ac signal carries out full-wave rectification and filtering, the output signal of rectification circuit module carries out the photoelectric isolating circuit module of security isolation with follow-up signal process circuit；And the output isolation signals of photoelectric isolating circuit module are adjusted to the signal shaping processing module of processing.Transformer is replaced using capacity voltage dropping circuit module, space shared by voltage sample circuit is greatly reduced, avoid the generation of electromagnetic radiation, make whole circuit and EMC characteristics more preferable, and, capacity voltage dropping circuit module economics are more preferable, energy-conserving and environment-protective, it is adaptable to the voltage sampling of dual-power transfer switch electrical equipment.
Description
Technical field
The present invention relates to dual-power transfer switch appliance field, more particularly to a kind of electronics of dual-power transfer switch electrical equipment
Control circuit.
Background technology
The important events of some low-voltage distributions, for reduce because of power failure and caused by economic loss, powered using two road power supplys：
Conventional, standby or standby each other, this two roads power supply can all be that power network is powered, and can also be powered all the way for power network, be all the way diesel oil
Generator powered.When barrier is unable to normal power supply for some reason in power supply process for power supply all the way, its load is switched to another road
The device of power supply is referred to as dual-power transfer switch electrical equipment, and abbreviation TSE, the device that its load is automatically handed over another road power supply claims
For automatic transfer switching electric appliance, abbreviation ATSE.
At present, ATSE is typically made up of automatic change-over body and control circuit two parts, and being used primarily in does not allow to stop
The important place of electricity.When the ATSE current power supply voltages or frequency for detecting load occurs more than the deviation of permission,
ATSE automatically switches to another power supply and powered, it is ensured that load supplying is not interrupted.Control in circuit provided with the current power supply electricity of monitoring
The circuit module of source voltage, is typically used as decompression device by miniature transformer and drops to power-frequency voltage in proportion and compare lower security
Control source carries out voltage monitoring to control circuit voltage test side.General two-way detecting voltage by three phase needs 6 small-sized transformations
Device, miniature transformer is inductive load, and because it is present, volume is big, takes the larger space of controller, is unfavorable for controller
Miniaturization；But also there is the defects such as miniature transformer harmonic wave is high, electromagnetic radiation is high, cost is high, power consumption is big, easily burn out.
The content of the invention
There is drawbacks described above in the voltage sample circuit for being currently used for dual-power transfer switch electrical equipment for solution, the present invention is provided
A kind of reliability height, small volume, the voltage sample circuit of small power consumption.
To achieve the above object, the scheme taken of the present invention is：A kind of voltage for dual-power transfer switch electrical equipment takes
Sample circuit, it is characterised in that：It includes the circuits below module being sequentially connected in series：Decompression processing is carried out with power frequency AC
Capacity voltage dropping circuit module, by capacity voltage dropping circuit module export low-voltage ac signal carry out full-wave rectification and filtering rectification
Circuit module, the output signal of rectification circuit module carries out the photoelectric isolating circuit mould of security isolation with follow-up signal process circuit
Block；And the output isolation signals of photoelectric isolating circuit module are adjusted to the signal shaping processing module of processing.Using electricity
Hold reduction voltage circuit module and replace transformer, the space shared by voltage sample circuit greatly reduces, it is to avoid the production of electromagnetic radiation
It is raw, make whole circuit and EMC characteristics more preferably, moreover, capacity voltage dropping circuit module economics are more preferable.
As a further illustration of the above scheme, capacity voltage dropping circuit module is by being resistant to the non-polar condenser of power frequency high voltage
The discharge resistance composition in parallel with the non-polar condenser；Capacity voltage dropping circuit module input is simultaneously connected to piezo-resistance.Pressure
Quick resistance has the effect of anti-lightning strike or overvoltage protection, it is ensured that electric capacity reliably working, it is not easy to punctured by high-voltage pulse current.It is preferred that
Ground, non-polar condenser is the CBB electric capacity that pressure voltage is 240V ~ 1000V or safety electric capacity, and its capacity is 0.01uF ~ 0.2uF.
Matchingly, discharge resistance is the k Ω of 330k Ω ~ 1000.
The rectification circuit module includes integrated full-wave rectification bridge, and located at the filtered electrical of full-wave rectification bridge output end
Hold.Form rectification circuit can reduce the capacity of non-polar condenser with respect to halfwave rectifier.
Photoelectric isolating circuit module includes precision photoelectric coupler, and the input of precision photoelectric coupler passes through current-limiting resistance
Connected with full-wave rectification bridge output end, the C poles of precision photoelectric coupler output end are connect by pull-up resistor to be connected with dc source.
Preferably, precision photoelectric coupler model PC817.Precision photoelectric coupler both plays a part of Phototube Coupling,
Signal linearly can be subjected to linear tradition again, simplify subsequent conditioning circuit.
Signal shaping processing module includes the phase inverter with Schmidt trigger, input and the linear light thermocouple of phase inverter
Clutch output end e poles connection, between the input of phase inverter and the negative pole of dc source filter capacitor and potentiometer；It is anti-phase
The output end of device is serially connected with diode.The smoother logic pulse signal of the exportable waveform of phase inverter, diode can be by adjacent phase
Signal isolated.
Preferably, phase inverter is model 74LS14 integrated circuit or the CMOS integrated circuits of model 40106.
Signal shaping processing module output end is connected with logic processing circuit module.Logic processing circuit module can be produced
Control the signal of dual-power transfer switch electrical equipment action.
The use of capacity voltage dropping circuit module, because electric capacity is capacitive load, its power factor is close to 1, and it is not in theory
Power is consumed, power consumption becomes very low, and harmonic wave is small.CBB electric capacity or safety electric capacity are cheap, and security performance is high.Polarity free capacitor
Device is the capacity voltage dropping circuit that main devices are constituted, and output is current signal.
Its principle of capacity voltage dropping circuit is actually to utilize capacitive reactance current limliting, and its Current calculation formula is illustrated below.Example
Such as, 220V/50Hz alternating voltage is being connected to as control voltage, when capacitance C is 1uF, if can using full-wave rectification
Obtained electric current（Average value）For：I(AV)=0.89×V/Zc=0.89×220×2×∏×f×C=0.89×220×2×
3.14×50×C=60000C=60000×0.000001=0.06A=60mA.The capacity of reasonable selection non-polar condenser, circuit
Can normal work.
From the foregoing, it will be observed that the present invention mainly has the advantage that：The simple science of circuit, occupies little space, and reliability is high, power consumption
It is small；Not only good economy performance, cost performance are high, energy-conserving and environment-protective, it is adaptable to the voltage sampling of dual-power transfer switch electrical equipment.
Brief description of the drawings
Fig. 1 is schematic block circuit diagram of the invention.
Fig. 2 is Fig. 1 circuit theory diagrams.
Main Reference label declaration：1-capacity voltage dropping circuit module, 2-rectification circuit module 2,3-Phototube Coupling
Circuit module, 4-signal shaping processing module.
Embodiment
Below in conjunction with the accompanying drawings and preferred embodiment, the present invention and its advantageous effects are carried out further specifically
It is bright.
Referring to Fig. 1 ~ Fig. 2, the voltage sample circuit for dual-power transfer switch electrical equipment include being sequentially connected in series with
Lower circuit module：The capacity voltage dropping circuit module 1 of decompression processing is carried out with power frequency AC, by capacity voltage dropping circuit module 1
The rectification circuit module 2 that low-voltage ac signal carries out full-wave rectification and filtering is exported, the output signal of rectification circuit module 2 is with after
Continuous signal processing circuit carries out the photoelectric isolating circuit module 3 of security isolation；And by the output of photoelectric isolating circuit module 3 every
From the signal shaping processing module 4 that signal is adjusted processing.Wherein, capacity voltage dropping circuit module 1 is by being resistant to power frequency high voltage
Non-polar condenser C1 and the discharge resistance R1 composition in parallel with non-polar condenser C1；Capacity voltage dropping circuit module 1 is inputted
Hold and be connected to piezo-resistance Rt1.Non-polar condenser C1 is the CBB electric capacity that pressure voltage is 240V ~ 1000V or safety electric capacity, its
Capacity is 0.01uF ~ 0.2uF.Discharge resistance R1 is the k Ω of 330k Ω ~ 1000.It is whole that rectification circuit module 2 includes integrated all-wave
Bridge DG1 is flowed, and located at the filter capacitor C2 of full-wave rectification bridge DG1 output ends.
In addition, photoelectric isolating circuit module 3 includes precision photoelectric coupler U1, precision photoelectric coupler U1 input leads to
Cross current-limiting resistance R2 to connect with full-wave rectification bridge DG1 output ends, the C poles of precision photoelectric coupler U1 output ends pass through pull-up resistor
R3 connects to be connected with dc source.Precision photoelectric coupler U1 models PC817.
Signal shaping processing module 4 includes the phase inverter U11 with Schmidt trigger, phase inverter U11 input and line
Property photoelectrical coupler U1 output ends e poles connection, filter capacitor C3 between phase inverter U11 input and the negative pole of dc source
The potentiometer TR1 of sum；Phase inverter U11 output end is serially connected with diode D1.Phase inverter U11 is model 74LS14 integrated electricity
Road or the CMOS integrated circuits of model 40106.The output end of signal shaping processing module 4 is connected with logic processing circuit module.
Book and specific embodiment do not constitute any limitation to the present invention according to the above description, and the invention is not limited in upper
The embodiment that face is disclosed and described, to some modification and variation of the present invention, it should also which the right for falling into the present invention will
In the protection domain asked.
Claims (3)
1. a kind of voltage sample circuit for dual-power transfer switch electrical equipment, it is characterised in that：It includes being sequentially connected in series
Circuits below module：The capacity voltage dropping circuit module of decompression processing is carried out with power frequency AC, by capacity voltage dropping circuit mould
Block output low-voltage ac signal carries out the rectification circuit module of full-wave rectification and filtering, and the output signal of rectification circuit module is with after
Continuous signal processing circuit carries out the photoelectric isolating circuit module of security isolation；And isolate the output of photoelectric isolating circuit module
Signal is adjusted the signal shaping processing module of processing；Capacity voltage dropping circuit module is by being resistant to the polarity free capacitor of power frequency high voltage
Device and the discharge resistance composition in parallel with the non-polar condenser；Capacity voltage dropping circuit module input is simultaneously connected to piezo-resistance；
Non-polar condenser is the CBB electric capacity that pressure voltage is 240V~1000V or safety electric capacity, and its capacity is 0.01uF~0.2uF；Put
Resistance is 330k Ω~1000k Ω；Rectification circuit module includes integrated full-wave rectification bridge, and defeated located at full-wave rectification bridge
Go out the filter capacitor at end；Photoelectric isolating circuit module includes precision photoelectric coupler, and the input of precision photoelectric coupler passes through
Current-limiting resistance is connected with full-wave rectification bridge output end, and the C poles of precision photoelectric coupler output end are connect and direct current by pull-up resistor
Power supply is connected；Precision photoelectric coupler model PC817；Signal shaping processing module is included with the anti-phase of Schmidt trigger
Device, the input of phase inverter is connected with the e poles of precision photoelectric coupler output end, the input of phase inverter and bearing for dc source
The potentiometer of filter capacitor sum between pole；The output end of phase inverter is serially connected with diode.
2. it is used for the voltage sample circuit of dual-power transfer switch electrical equipment as claimed in claim 1, it is characterized in that：It is described anti-phase
Device is model 74LS14 integrated circuit or the CMOS integrated circuits of model 40106.
3. it is used for the voltage sample circuit of dual-power transfer switch electrical equipment as claimed in claim 2, it is characterized in that：The signal
Shape correction module output end is connected with logic processing circuit module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510156940.4A CN104734331B (en) | 2015-04-04 | 2015-04-04 | A kind of voltage sample circuit for dual-power transfer switch electrical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510156940.4A CN104734331B (en) | 2015-04-04 | 2015-04-04 | A kind of voltage sample circuit for dual-power transfer switch electrical equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104734331A CN104734331A (en) | 2015-06-24 |
| CN104734331B true CN104734331B (en) | 2017-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510156940.4A Expired - Fee Related CN104734331B (en) | 2015-04-04 | 2015-04-04 | A kind of voltage sample circuit for dual-power transfer switch electrical equipment |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI731255B (en) * | 2018-08-08 | 2021-06-21 | 緯創資通股份有限公司 | Relay adaptive to alternative current and direct current input signals |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0398722A3 (en) * | 1989-05-18 | 1991-01-30 | Hirotami Nakano | Uninterruptable power supply apparatus and isolating method thereof |
| CN2270984Y (en) * | 1996-04-11 | 1997-12-17 | 哈尔滨工业大学 | Electric servo manipulator |
| CN101162850A (en) * | 2007-09-20 | 2008-04-16 | 浙江中凯电器有限公司 | Control device of duplicate supply attent-unattent switch |
| CN201177241Y (en) * | 2008-03-11 | 2009-01-07 | 朱帮选 | Semiconductor environment-friendly energy conserving lamp |
| CN201282359Y (en) * | 2008-09-13 | 2009-07-29 | Abb新会低压开关有限公司 | Phase lack detection device for double power supply automatic transfer equipment |
| CN201374586Y (en) * | 2009-02-24 | 2009-12-30 | 北京国电智深控制技术有限公司 | Dual power supply switcher |
| CN102707127A (en) * | 2012-05-29 | 2012-10-03 | 长沙奥托自动化技术有限公司 | Simplified type alternating-current zero-crossing detecting and amplitude value sampling unit |
| CN103457349B (en) * | 2013-07-25 | 2015-08-12 | 德力西电气有限公司 | A kind of SCM Based duplicate supply conversion control circuit |
| CN103607037B (en) * | 2013-11-01 | 2015-09-09 | 恒动能源（深圳）有限公司 | A kind of switching device shifter of ups power |
| CN203851010U (en) * | 2014-05-17 | 2014-09-24 | 中山市电赢科技有限公司 | Isolation-type uninterrupted power supply mains supply detection circuit |
| CN103969498A (en) * | 2014-05-30 | 2014-08-06 | 江苏容天机电科技有限公司 | High-power high-frequency power supply output overvoltage detection circuit |
| CN104483579A (en) * | 2014-12-26 | 2015-04-01 | 江苏斯菲尔电气股份有限公司 | Switching value acquisition circuit |
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2015
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| CN104734331A (en) | 2015-06-24 |
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Effective date of registration: 20160812 Address after: 528000 Jiangwan Road, Guangdong, No. 18, No. Applicant after: Foshan Science &. Technology College Address before: 528000, two, 920, five, 1, 3, six, Jihua Road, Chancheng District, Guangdong, Foshan Applicant before: Foshan Lan Tu Science and Technology Ltd. |
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