CN106685211A - Switching power supply, electrical isolation method and ammeter - Google Patents
Switching power supply, electrical isolation method and ammeter Download PDFInfo
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- CN106685211A CN106685211A CN201610700515.1A CN201610700515A CN106685211A CN 106685211 A CN106685211 A CN 106685211A CN 201610700515 A CN201610700515 A CN 201610700515A CN 106685211 A CN106685211 A CN 106685211A
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- 238000002955 isolation Methods 0.000 title claims abstract description 50
- 238000004891 communication Methods 0.000 claims description 51
- 230000008878 coupling Effects 0.000 claims description 51
- 238000010168 coupling process Methods 0.000 claims description 51
- 238000005859 coupling reaction Methods 0.000 claims description 51
- 230000005352 galvanomagnetic phenomena Effects 0.000 claims description 19
- 230000000087 stabilizing effect Effects 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 16
- 230000033228 biological regulation Effects 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 11
- 230000005611 electricity Effects 0.000 claims description 11
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- 230000005288 electromagnetic effect Effects 0.000 abstract 2
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- 239000011810 insulating material Substances 0.000 description 6
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- 230000005674 electromagnetic induction Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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Abstract
The invention relates to a switching power supply, an electrical isolation method and an ammeter. The switching power supply comprises a first transformer and a second transformer, wherein an external power supply is coupled to a primary coil of the first transformer, a secondary coil of the first transformer is coupled to a primary coil of the second transformer, a secondary coil of the second transformer is coupled to a load, the first transformer is used for adjusting an input voltage of the external power supply to a first voltage signal by an electromagnetic effect of the primary coil and the secondary coil of the first transformer and inputting the first voltage signal to the primary coil of the second transformer so that the external power supply is electrically isolated with the second transformer, and the second transformer is used for adjusting the first voltage signal to a second voltage signal by an electromagnetic effect of the primary coil and the secondary coil of the second transformer and outputting the second voltage signal to the load so that the first transformer is electrically isolated with the load. By series connection of the first transformer and the second transformer, the electrical isolation of 10KV between the external power supply and the load is achieved.
Description
Technical field
The present invention relates to technical field of electricity, in particular to a kind of Switching Power Supply and electrical isolation method, ammeter.
Background technology
With the development and raising of science and technology, ammeter has been carried out intellectuality.Intelligent electric meter still needs to personnel to be carried out necessarily
Operation and maintenance, wherein, be a basic function to its data reading system using the RS-485 interfaces of electric energy meter.In prior art
Intelligent electric meter in, the 6KV pulse voltages that can bear required by national grid of maximum are isolated between RS-485 interfaces and electrical network.
But the surge of the development and power consumption with society, power system is also more next for the requirement of intelligent electric meter safety and reliability
It is higher.Therefore, the isolation of the 6KV pulse voltages to be born in prior art can not gradually meet safety and reliability
Requirement, when carrying out operation and maintenance to intelligent electric meter by RS-485 interfaces so as to personnel, there is safety in existing intelligent electric meter
Hidden danger.And in prior art, insulating materials can be increased by increase transformer size or between Transformer Winding to improve intelligence
The insulating properties of energy ammeter.It is oversized that increase transformer causes intelligent electric meter, is not convenient to use；And increase insulating materials and cause
The production cost of intelligent electric meter is too high.Therefore, how effectively improving intelligent electric meter and bearing higher pulse voltage isolation is
Current industry a great problem.
The content of the invention
It is an object of the invention to provide a kind of Switching Power Supply and electrical isolation method, ammeter, it bears can ammeter
Higher pulse voltage.
In a first aspect, a kind of Switching Power Supply is embodiments provided, including：First transformer and the second transformer；
External power source is coupled with the primary coil of first transformer, the secondary coil of first transformer and second transformation
The primary coil coupling of device, the secondary coil of second transformer is coupled with load.First transformer is used to pass through institute
The galvanomagnetic-effect of the primary coil of the first transformer and the secondary coil of first transformer is stated by the defeated of the external power source
Enter voltage-regulation for first voltage signal, and by the primary coil of the second transformer described in the first voltage signal input, with
The external power source is made with the second transformer electrical isolation.Second transformer is used for by second transformer
The first voltage Signal Regulation is second voltage by the galvanomagnetic-effect of the secondary coil of primary coil and second transformer
Signal, and by the second voltage signal output to the load, so that first transformer is isolated with the load electrical.
Further, also include：Pulse control circuit and switch module, the switch module includes：First contact, second
Contact and control end, the output end of the pulse control circuit is coupled with the control end, first contact and described first
The primary coil coupling of transformer, second contact couples with reference voltage end.
Further, the primary coil of first transformer includes：First primary coil and the second primary coil,
One end of first primary coil couples with the external power source, and the other end of first primary coil is touched with described first
Point coupling, one end of second primary coil and second coupling contact points, the other end of second primary coil and institute
State the power end coupling of pulse control circuit.
Further, the switch module includes FET, and the grid of the FET is the control end, described
The drain electrode of FET is first contact, and the source electrode of the FET is second contact.
Second aspect, the embodiment of the present invention additionally provides a kind of ammeter, including：Metering module, communication module, control module
And the input of Switching Power Supply, the input of the metering module and the control module with the pair of first transformer
Sideline circle coupling；The secondary coil of second transformer is coupled with the communication module, the communication module and the control
Module is coupled.
Further, the secondary coil of first transformer includes：First secondary coil and the second secondary coil, it is described
First secondary coil and second secondary coil are coupled with the primary coil of first transformer, the metering mould
The input of block is coupled with first secondary coil, and the input of the control module is coupled with second secondary coil,
Second secondary coil is coupled with the primary coil of second transformer.
Further, the communication module passes through the first photoelectrical coupler and the second photoelectrical coupler with the control module
Coupling, first photoelectrical coupler includes：First light emitting diode and the first phototriode；First light emitting diode
Two ends couple with the output end of the control module, the collector terminal and emitter terminal of first phototriode with
The input coupling of the communication module；Second photoelectrical coupler includes：Second light emitting diode and the second photosensitive three pole
Pipe；The two ends of second light emitting diode couple with the output end of the communication module, second phototriode
Collector terminal and emitter terminal are coupled with the input of the control module.
Further, also include：Detection circuit, the input of the detection circuit and the input coupling of the control module
Close, the output end of the detection circuit is coupled with the input of the pulse control circuit.
Further, also include：Rectification module and Voltage stabilizing module, the input of the rectification module and second transformation
The secondary coil coupling of device, the output end of the rectification module is coupled with the input of the Voltage stabilizing module, the Voltage stabilizing module
Output end couple with the communication module.
The third aspect, the embodiment of the present invention additionally provides a kind of electrical isolation method, and methods described includes：First transformer
For by the galvanomagnetic-effect of the primary coil of first transformer and the secondary coil of first transformer by external electrical
The input voltage regulation in source is first voltage signal, and by the primary coil of the transformer of first voltage signal input second,
So that the external power source and the second transformer electrical isolation.Second transformer is used to pass through second transformer
Primary coil and the galvanomagnetic-effect of secondary coil of second transformer be second electric by the first voltage Signal Regulation
Pressure signal, and by the second voltage signal output to load, so that first transformer is isolated with the load electrical.
The beneficial effect of the embodiment of the present invention is：Coupled with the primary coil of the first transformer by external power source, first
The secondary coil of transformer is coupled with the primary coil of the second transformer, and the secondary coil of the second transformer is coupled with load.
Due to the first transformer and the second transformer series, the voltage of input just can be assigned to the first transformer and
Two transformers.The insulating materials that the secondary coil of the primary coil of the first transformer and the first transformer is provided with ensure that first
Dielectric strength between the secondary coil of the primary coil of transformer and the first transformer reaches 6KV, i.e., can realize the electricity of 6KV
Air bound from.And the insulating materials that the secondary coil of the primary coil of the second transformer and the second transformer is provided with ensure that second
Dielectric strength between the secondary coil of the primary coil of transformer and the second transformer can also reach 6KV, i.e., also can be real
The electrical isolation of existing 6KV.After first transformer and the second transformer series, the voltage of external power source input just can be assigned to
First transformer and the second transformer.And then can bear the electricity within 12KV after the first transformer and the second transformer series
Pressure, and realize electrical isolation.
The cascaded structure of the first transformer and the second transformer is applied in ammeter, and ammeter passes through the first transformer and second
The series connection of transformer and realize the electrical isolation of at least 10KV electric pressures between the input power and ammeter of outside, and then significantly
The insulation values that improve ammeter, make ammeter bear higher pulse voltage.
Description of the drawings
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below will be attached to what is used needed for embodiment
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, thus be not construed as it is right
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can be with according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 provides a kind of module map of Switching Power Supply for the embodiment of the present invention；
Fig. 2 provides a kind of circuit diagram of Switching Power Supply for the embodiment of the present invention；
Fig. 3 provides one kind and is applied to the electrical isolation method for the embodiment of the present invention；
Fig. 4 provides a kind of module map of the ammeter for being applied to the Switching Power Supply for the embodiment of the present invention；
Fig. 5 provides a kind of circuit diagram of the ammeter of the application Switching Power Supply for the embodiment of the present invention
In figure：Switching Power Supply 100, fairing 110, electromagnetic interference process circuit 111, rectifying and wave-filtering 112, switch module
120th, pulse control circuit 130, ammeter 200, the first rectifying and voltage-stabilizing device 210, metering module 220, the second fairing 230,
Control module 240, the 3rd rectifying and voltage-stabilizing device 250, communication module 260, detection circuit 270.
Specific embodiment
To make purpose, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
The a part of embodiment of the present invention, rather than the embodiment of whole.Present invention enforcement generally described and illustrated in accompanying drawing herein
The component of example can be arranged and designed with a variety of configurations.
Therefore, the detailed description of embodiments of the invention below to providing in the accompanying drawings is not intended to limit claimed
The scope of the present invention, but be merely representative of the present invention selected embodiment.Based on the embodiment in the present invention, this area is common
The every other embodiment that technical staff is obtained under the premise of creative work is not made, belongs to the model of present invention protection
Enclose.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined in individual accompanying drawing, then it need not be further defined and is explained in subsequent accompanying drawing.In description of the invention
In, term " first ", " second ", " the 3rd " etc. are only used for distinguishing description, and it is not intended that indicating or implying relative importance.
In describing the invention, in addition it is also necessary to explanation, unless otherwise clearly defined and limited, term " setting ",
" connection ", " coupling " should be interpreted broadly, for example, it may be being fixedly connected, or being detachably connected, or integratedly connect
Connect；Can be mechanically connected, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can
Being the connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood with concrete condition
Concrete meaning in the present invention.
Fig. 1 is referred to, Fig. 1 shows the module map of Switching Power Supply provided in an embodiment of the present invention 100.Switching Power Supply 100 is wrapped
Include：Fairing 110, the first transformer T1, the second transformer T2, switch module 120 and pulse control circuit 130.
Refer to the circuit diagram of Switching Power Supply provided in an embodiment of the present invention 100 illustrated in fig. 2.Fairing 110 is used
In the power supply that external power input mouth AA ' is input into is carried out to eliminate electromagnetic interference and rectification.By fairing 110 by outside
The AC rectification of power input is direct current, and is input into the primary coil of the first transformer T1.Preferably, fairing 110 is wrapped
Include：Electromagnetic interference process circuit 111 and the circuit of rectifying and wave-filtering 112.The input and external power source of electromagnetic interference process circuit 111
Input port AA ' is coupled, and the output end of electromagnetic interference process circuit 111 is coupled with the input of the circuit of rectifying and wave-filtering 112.By
In the ac high voltage source of port AA ' inputs, there is electromagnetic interference in ac high voltage source, and then equipment is interfered.Electricity
Magnetic disturbance process circuit 111 can be used in the electromagnetic interference filtering of the external power source of input, and equipment is done so as to avoid
Disturb.At the same time, electromagnetic interference process circuit 111 can also filter the interference signal that Switching Power Supply itself is produced, to prevent out
The powered-down interference signal produced from body is flowed into electrical network, and the operation to the other equipment of electrical network is interfered.Optionally, this reality
Applying can adopt EMC (Electro Magnetic Compatibility) process circuits by way of filtering and shielding to eliminate
The electromagnetic interference that the external power source of input is present.The circuit of rectifying and wave-filtering 112 is whole by coupling with electromagnetic interference process circuit 111
Stream 112 circuits of filtering can receive the electric signal after electromagnetic interference process circuit 111 is processed.The circuit of rectifying and wave-filtering 112 is used for
The AC signal of input is converted into the primary coil that the first transformer T1 is output to after direct current by rectification and filtering.
First transformer T1 is used for the secondary of the primary coil by the first transformer T1 and T1 the first transformer T1
The input voltage regulation of external power source is first voltage signal by the galvanomagnetic-effect of coil.Preferably, the original of the first transformer T1
Sideline circle includes：First primary coil aa ', the second primary coil bb '.The secondary coil of the first transformer T1 includes：First is secondary
Cc ', the second secondary coil dd ' are enclosed in sideline.Protection circuit is provided between first primary coil aa ', protection circuit includes：First is electric
Hold C1, first resistor R1 and the first diode D1.The input of the first primary coil aa ' and the output of the circuit of rectifying and wave-filtering 112
End coupling, one end of the first electric capacity C1 and one end of first resistor R1 couple with the input of the first primary coil aa '.First
The other end of electric capacity C1 and the other end of first resistor R1 are coupled with the cathode terminal of the first diode D1, the first diode D1's
Anode tap is coupled with the output end of the first primary coil aa '.Optionally, the protection circuit of the present embodiment is RCD absorbing circuits.It is logical
Cross the one-way conduction of the first diode D1, and the energy storage of the first electric capacity C1 and protect so as to be formed to FET Q1.
Switch module 120 is used to carry out the connection between the primary coil and reference voltage end of the transformer of break-make first, with
Change the voltage at the primary coil two ends of the first transformer.Preferably, the switch module includes：First contact, the second contact,
First contact couples with the primary coil of first transformer, and second contact couples with reference voltage end.
In addition, for the ease of by the first contact of the Signal-controlled switch module with low and high level such as pulse signal and
The break-make and closure of the second contact, the switch module also includes control end, and the control end is used for the pulse signal of receives input, with
Control the break-make of the first contact and the second contact.
Preferably, switch module 120 can be：FET Q1.Because switch module 120 includes：First contact, second
Contact and control end, so as to FET Q1 grids can be control end, the drain electrode of FET Q1 can be the first contact, field
The source electrode of effect pipe Q1 can be the second contact.
In the embodiment of the present invention, Switching Power Supply 100 also includes pulse control circuit 130, and pulse control circuit 130 is used for
Cut-offfing for controlling switch module 120, is opened so as to pass through the controlling switch module 120 of pulse control circuit 130 with certain frequency
It is disconnected, just the direct current signal that current rectifying and wave filtering circuit 112 is exported can be changed into pulse signal.First transformer T1 primary coils
Pulse signal can make the secondary coil of the first transformer T1 that the first voltage signal of same frequency is produced by electromagnetic induction,
And first voltage signal is step-down pulse voltage.By the first transformer T1 secondary coils respectively with output port BB ' and output
Port CC ' is coupled, so that the first transformer T1 secondary coils will be depressured pulse voltage respectively by output port BB ' and output end
Mouth CC ' outputs.
Preferably, pulse control circuit 130 includes：It is control chip U1, the second diode D2, second resistance R2, second electric
Hold C2 and the 3rd electric capacity C3.
The output end of the first primary coil aa ' is coupled with the drain electrode of FET Q1.The grid of FET Q1 and control
Output control terminal (PWM-OUT) coupling of chip U1, the source electrode of FET Q1 is coupled with one end of the second primary coil bb '.
Because the source electrode of FET Q1 is also coupled with reference voltage end, so as to one end of the second primary coil bb ' can be with reference to electricity
Pressure side, i.e. one end of the second primary coil bb ' are ground reference point.The other end of the second primary coil bb ' and the two or two pole
The anode coupling of pipe D2, the negative electrode of the second diode D2 is coupled with one end of second resistance R2.The other end of second resistance R2 with
One end coupling of the second electric capacity C2, the other end of the second electric capacity C2 is coupled with FET Q1 source electrodes.The power supply of control chip U1
Voltage end VDD couples to provide the operating voltage of control chip U1 with the other end of second resistance R2.The output of control chip U1
Under-voltage protection side BR is coupled with the other end of the second electric capacity C2.The one of the feedback voltage end FB and the 3rd electric capacity C3 of control chip U1
End coupling, the other end of the 3rd electric capacity C3 is coupled with the other end of the second electric capacity C2.
Coupled with the drain electrode of FET Q1 and the second primary coil by the first primary coil aa ' of the first transformer T1
Bb ' is coupled with the source electrode of FET Q1, and control chip U1 with the grid of FET Q1 by coupling, so as to control chip
U1 can control cut-offfing for FET Q1.Control chip U1 control FET Q1 intermittence conductings, so as to rectifying and wave-filtering electricity
The direct current signal of the output of road 112 is cut to pulse signal.First primary coil aa ' can make the first former limit by pulse signal
Coil aa ' produces alternating magnetic field such that it is able to makes the second primary coil bb ' produce frequency and is depressured with pulse signal identical the 3rd
Pulse voltage.3rd step-down pulse voltage signal of the second primary coil bb ' outputs passes through the second diode D2, second resistance R2
It is direct current signal by the 3rd step-down pulse voltage signal rectification with the first rectification circuit of the second electric capacity C2 compositions.And direct current
Signal is by the power voltage terminal VDD of input control chip U1 providing the power supply of control chip U1.Optionally, in the present embodiment
In, the first rectification circuit being made up of the second diode D2, second resistance R2 and the second electric capacity C2 can be half-wave rectifying circuit.
First primary coil aa ' can make the first primary coil aa ' produce alternating magnetic field by pulse signal such that it is able to
Make the first secondary coil cc ' and the second secondary coil dd ' that voltage is produced by electromagnetic induction.Optionally, in the present embodiment, the
The voltage signal step-down that one transformer T1 is input into Switching Power Supply 100.Therefore, the first secondary coil cc ' can produce frequency with
Pulse signal identical first is depressured pulse voltage, and the second secondary coil dd ' can also produce frequency and pulse signal identical
Second step-down pulse voltage.First step-down pulse voltage just can by the coupling of output port BB ' and the first secondary coil cc '
External loading is exported, and the second step-down pulse voltage just also can by the coupling of output port CC ' and the second secondary coil dd '
Enough output is to external loading.
Second transformer T2 is used for the secondary coil of the primary coil by the second transformer T2 and the second transformer T2
First voltage Signal Regulation is second voltage signal by galvanomagnetic-effect, and by the second voltage signal output to load, so that
First transformer T1 isolates with load electrical.
The primary coil of the second transformer T2 is coupled with the second secondary coil dd ' of the first transformer T1, so as to second is secondary
The the second step-down pulse voltage for producing can be input into sideline circle dd ' primary coil of the second transformer T2.Second transformer T2
Secondary coil produced by the primary coil electromagnetic induction with the second transformer T2 and second step-down pulse voltage same frequency
The step-down pulse signal of rate.By the secondary coil of the second transformer T2 and the coupling of output port DD ', just arteries and veins can will be depressured
Signal output is rushed to external loading.
Therefore, the Switching Power Supply 100 that the present embodiment is provided, when Switching Power Supply 100 works, the first transformer T1 passes through first
Galvanomagnetic-effect between the secondary coil of the primary coil of transformer T1 and the first transformer T1, can be by the input of external power source
Voltage-regulation is step-down pulse voltage, and step-down pulse voltage is first voltage signal.Step-down pulse voltage includes：First step-down
Pulse voltage, the second step-down pulse voltage and the 3rd pulse step-down voltage.First step-down pulse voltage input external loading, second
Step-down pulse voltage is input into the primary coil of the second transformer T2, and the 3rd step-down voltage provides control chip U1 supply voltages.
It is transmitted so as to make external power source and the second transformer T2 and external loading by the galvanomagnetic-effect of the first transformer T1
Realize electrical isolation.Second transformer T2 by the secondary coil of the primary coil of the second transformer T2 and the second transformer T2 it
Between galvanomagnetic-effect, can by input second step-down pulse voltage be adjusted to be depressured pulse signal, it is possible to understand that, step-down
Pulse signal is second voltage signal.Second transformer T2 is input to external loading by pulse signal is depressured, and becomes by second
The galvanomagnetic-effect of depressor T2 is transmitted so as to make the first transformer T1 and external loading realize electrical isolation.
When Switching Power Supply 100 works, i.e. the first transformer T1 and the second transformer T2 is in electromagnetic transmission.First transformer
T1 and the second transformer T2 can be born between the primary coil and secondary coil of the voltage of some strength, i.e. the first transformer T1
It is required to bear the voltage of some strength and the primary coil and secondary coil of the second transformer T2 between.First transformer T1's
The intensity of voltage is being born between primary coil and secondary coil and the primary coil and secondary coil of the second transformer T2 between
There is a maximum voltage bearing value.Original between the primary coil and secondary coil of the first transformer T1 with the second transformer T2
The voltage born and secondary coil between is enclosed when within maximum voltage bearing value in sideline, the primary coil of the first transformer T1
Can be transmitted with galvanomagnetic-effect and the primary coil and secondary coil of the second transformer T2 between and secondary coil between, i.e.,
Between the primary coil and secondary coil of the first transformer T1 and the primary coil and secondary coil of the second transformer T2 between
Without electric connection, so as to realize electrical isolation.But work as and become with second between the primary coil and secondary coil of the first transformer T1
When the voltage born between the primary coil and secondary coil of depressor T2 is higher than maximum voltage bearing value, the first transformer T1's
Galvanomagnetic-effect biography is carried out between primary coil and secondary coil and the primary coil and secondary coil of the second transformer T2 between
It is defeated destroyed, i.e., with the primary coil and secondary of the second transformer T2 between the primary coil and secondary coil of the first transformer T1
It is breakdown between coil, so as to electrical isolation is destroyed, and it is electrically connected.
In the present embodiment, the insulation material that the secondary coil of the primary coil of the first transformer T1 and the first transformer T1 is provided with
Material can not only ensure that the dielectric strength between the primary coil of the first transformer T1 and the secondary coil of the first transformer T1 reaches
To 6KV, additionally it is possible to ensure that dielectric strength reaches 6KV between the secondary coil and secondary coil of the first transformer T1, i.e., can be real
The electrical isolation of 6KV between the first secondary coil cc ' and the second secondary coil dd ' of existing first transformer T1.Second transformer
The insulating materials that the secondary coil of the primary coil of T2 and the second transformer T2 is provided with ensure that the former limit of the second transformer T2
Dielectric strength between the secondary coil of coil and the second transformer T2 can also reach 6KV, i.e., can also realize that 6KV's is electric
Isolation.First transformer T1 and the second transformer T2 connects, and the voltage that Switching Power Supply 100 is input into when working just can be allocated
To the first transformer T1 and the second transformer T2.And the structural material of the first transformer T1 and the second transformer T2 is close, so as to
The voltage being input into by Switching Power Supply 100 just can be evenly distributed to the first transformer T1 and the second transformer T2.First transformation
Device T1 can bear the voltage within 6KV, and realize electrical isolation, and the second transformer T2 can also bear the electricity within 6KV
Pressure, and electrical isolation is also realized, and then the electricity within 12KV can be born after the first transformer T1 and the second transformer T2 series connection
Pressure, and realize electrical isolation.
Therefore, in the Switching Power Supply 100 of the present embodiment, Switching Power Supply 100 can pass through the first transformer T1 and second
The series connection of transformer T2 and realize between the input power of outside and the loads that coupled of the second transformer T2 at least 10KV voltages
The electrical isolation of grade.
Please join a kind of flow chart of electrical isolation method provided in an embodiment of the present invention illustrated in fig. 3.Methods described bag
Include：Step S101 and step S102.
Step S101：First transformer is used for by the primary coil of first transformer and first transformer
The input voltage regulation of external power source is first voltage signal by the galvanomagnetic-effect of secondary coil, and by the first voltage signal
The primary coil of the second transformer is input into, so that the external power source and the second transformer electrical isolation；
Step S102：Second transformer is used for primary coil and second transformation by second transformer
The first voltage Signal Regulation is second voltage signal by the galvanomagnetic-effect of the secondary coil of device, and the second voltage is believed
Number output to the load so that first transformer is isolated with the load electrical.
Those skilled in the art can be understood that, for convenience and simplicity of description, the method for foregoing description
Specific work process, may be referred to the corresponding process in aforementioned means, will not be described here.
Refer to the embodiment of the present invention illustrated in fig. 4 and a kind of module map of ammeter 200 is provided.Above-mentioned Switching Power Supply
100 are applied to the ammeter 200.Ammeter 200 includes：First rectifying and voltage-stabilizing device 210, the second fairing 230, the 3rd rectification are steady
Pressure device 250, metering module 220, communication module 260, control module 240, detection circuit 270, the first photoelectrical coupler OC1,
Second photoelectrical coupler OC2, the 3rd photoelectrical coupler OC3 and the 4th photoelectrical coupler OC4.
Refer to the embodiment of the present invention illustrated in fig. 5 and a kind of circuit diagram of ammeter 200 is provided.
First rectifying and voltage-stabilizing device 210 is used to that rectification will to be carried out by output port BB ' outputs the first step-down pulse voltage
And voltage stabilizing, so as to the first step-down pulse voltage is converted into DC signal output to metering module 220.Preferably, the first rectification
The input of stable-pressure device 210 is coupled by output port BB ' with the first secondary coil cc ', what the first secondary coil cc ' was produced
First step-down pulse voltage can be input into the first rectifying and voltage-stabilizing device 210.First drop of the first rectifying and voltage-stabilizing device 210 pairs input
Pressure pulse voltage carries out rectification and voltage stabilizing such that it is able to which the first step-down pulse voltage of input is converted to direct current signal and is exported
To in metering module 220.The energy data of circuit of the metering module 220 by being measured with the coupling of control module 240 is defeated
Go out to control module 240.The input of the second fairing 230 is coupled by output port CC ' with the second secondary coil dd ',
Second fairing 230 can be used to that pulse voltage will be depressured by output port CC ' outputs second carry out rectification, so as to by second
Step-down pulse voltage is converted to DC signal output to control module 240, to provide the power supply of control module 240.Control module
240 are used for by the coupling with metering module 220, so as to the operating state data of the circuit for receiving be integrated.Control
The operating state data of circuit after integration can be transferred to communication module 260 by module 240, so as to realize and communication module 260
Between data interaction.Preferably, the second fairing 230 includes：3rd diode D3, the 4th electric capacity C4, the first inductance L1
With the 5th electric capacity C5.The anode of the 3rd diode D3 is coupled with one end of the second secondary coil dd ', the negative electrode of the 3rd diode D3
Couple with one end of the 4th electric capacity C4, the other end of the 4th electric capacity C4 is coupled and be grounded with the other end of the second secondary coil dd '.
One end of first inductance L1 couples with one end of the 4th electric capacity C4, the other end of the first inductance L1 and one end coupling of the 5th electric capacity C5
Close.The coupling of the other end of the 5th electric capacity C5 and the other end of the 4th electric capacity C4, the two ends of the 5th electric capacity C5 are and control module
240 coupling.
By the 3rd diode D3, the filtering of the rectification of the 4th electric capacity C4 and the 5th electric capacity C5 and the first inductance L1, so as to
Second step-down pulse voltage can be converted to direct current signal input control module 240, to provide the power supply of control module 240.
The secondary coil coupling that the input of the 3rd rectifying and voltage-stabilizing device 250 passes through input port DD ' and the second transformer T2
Close, the 3rd rectifying and voltage-stabilizing device 250 can be used to that rectification and voltage stabilizing will be carried out by output port DD ' output bucks pulse signal,
Communication module 260 is input to so as to step-down pulse signal is converted into direct current signal, to provide the power supply of communication module 260.It is logical
Letter module 260 can be used to be transmitted the operating state data of circuit such that it is able to realize to the manipulation of ammeter 200 and remote
Range monitoring.Optionally, communication module 260 can be RS-485 communication modules.In the present embodiment, by the first transformer T1 and
The series connection of the second transformer T2, so as to reach 10KV electrical isolations between RS-485 communication modules and electrical network.So as to effectively improve
Personnel carry out by RS-485 communication modules security during operation and maintenance.And reach between RS-485 communication modules and electrical network
To 10KV electrical isolations the stability and reliability of ammeter work can also effectively improved.
Preferably, the 3rd rectifying and voltage-stabilizing device 250 includes：Rectification circuit and mu balanced circuit.Rectification circuit includes：Four or two
Pole pipe D4, the 6th electric capacity C6, mu balanced circuit can be voltage stabilizing chip U2.The anode of the 4th diode D4 and the second transformer T2 pairs
One end coupling of sideline circle, the negative electrode of the 4th diode D4 is coupled with one end of the 6th electric capacity C6.The other end of the 6th electric capacity C6
Couple and be grounded with the other end of the second transformer T2 secondary coils.The input Vin's and the 6th electric capacity C6 of voltage stabilizing chip U2
One end couples, and the other end of the earth terminal GND and the 6th electric capacity C6 of voltage stabilizing chip U2 is altogether.The output end vo ut of voltage stabilizing chip U2
Couple with one end of the 7th electric capacity C7, the other end ground connection of the 7th electric capacity C7.The two ends of the 7th electric capacity C7 with communication module 260
Coupling.
The step-down pulse signal of the second transformer T2 secondary coils output can be turned by the rectification of the 4th diode D4
Change direct current signal.Communication module 260 is arrived in direct current signal output after being input into voltage stabilizing chip U2 with by its voltage stabilizing, to provide communication
The power supply of module 260.
In the present embodiment, control module 240 is coupled respectively with metering module 220 and communication module, is to ensure control
Module 240 is formed respectively while interaction with the data between metering module 220 and communication module 260, also needs to ensure control mould
The electrical isolation good between metering module 220 and communication module 260 respectively of block 240.As a kind of mode, control module
240 can realize coupling with communication module 260 by the first photoelectrical coupler OC1 and the second photoelectrical coupler OC2.First smooth thermocouple
Clutch OC1 and the second photoelectrical coupler OC2 can be used in the operating state data of the circuit after control module 240 is processed with light
The mode and communication module 260 of electricity interacts transmission.First photoelectrical coupler OC1 includes：First light emitting diode D5 and
One phototriode T1.Equal and control module 240 the output end coupling of the anode and negative electrode of the first light emitting diode D5.First light
The emitter and collector of quick triode T1 is coupled with the input of communication module 260.And the second photoelectrical coupler OC2 bags
Include：Second light emitting diode D6 and the second phototriode T2.The anode and negative electrode of the second light emitting diode D6 with the mould that communicates
The output end coupling of block 260.The emitter and collector of the second phototriode T2 with the input coupling of control module 240
Close.
The output end of control module 240 is coupled by the first photoelectrical coupler OC1 with the input of communication module 260, from
And the data signal of the operating state data of the circuit after process is converted to analog signal input first and is lighted by control module 240
The electric signal of input is converted to optical signal by diode D5, the first light emitting diode D5 by luminous.First phototriode T1
By receiving the optical signal that the first light emitting diode D5 sends, so as to convert optical signals to input communication module after electric signal again
260.Communication module 260 is again converted to the analog signal of input after data signal, and communication module 260 is by the work shape of circuit
State data are transmitted such that it is able to realize the manipulation to ammeter 200 and remote monitoring.At the same time, the work of communication module 260
After the electric signal that the data that work is produced are converted to, also optical signal can be converted to by the second light emitting diode D6.Second photosensitive three
Pole pipe T2 is controlled by receiving the optical signal that the second light emitting diode D6 sends so as to convert optical signals to input after electric signal again
Molding block 240.
First photoelectrical coupler OC1 has photoelectricity transmission effect, so as to pass through the first photoelectrical coupler OC1 to signal transmission
While, also achieve the electrical isolation between control module 240 and communication module 260.By the second photoelectrical coupler OC2's
Photoelectricity transmission effect, while so as to realize that signal can be fed back to control module 240 by communication module 260, also realizes again
Electrical isolation between control module 240 and communication module 260.
Alternatively, control module 240 can pass through the 3rd photoelectrical coupler OC3 and the 4th with metering module 220
Photoelectrical coupler OC4 realizes coupling.3rd photoelectrical coupler OC3 and the 4th photoelectrical coupler OC4 can be used in control module
240 receive and process circuit energy data is in the way of photoelectricity and metering module 220 interacts transmission.3rd smooth thermocouple
Clutch OC3 includes：3rd light emitting diode D7 and the 3rd phototriode T3.The anode and negative electrode of the 3rd light emitting diode D7 is equal
Couple with the output end of metering module 220.The emitter and collector of the 3rd phototriode T3 is defeated with control module 240
Enter end coupling.And the 4th photoelectrical coupler OC4 includes：4th light emitting diode D8 and the 4th phototriode T4.4th lights
The anode and negative electrode of diode D8 is coupled with the output end of control module 240.The emitter stage and collection of the 4th phototriode T4
Electrode is coupled with the input of metering module 220.
There is photoelectricity transmission effect by the 3rd photoelectrical coupler OC3 and the 4th photoelectrical coupler OC4, such that it is able to incite somebody to action
Signal between metering module 220 and control module 240 is interacted in the form of photoelectricity, and then can realize metering module
Electrical isolation between 220 and control module 240.
The present embodiment is additionally provided with detection circuit 270, detects that circuit 270 is used for the direct current to the output of the second fairing 230
Signal is acquired, and is entered into control chip U1, so that control chip U1 adjusts field-effect according to the signal value of input
Pipe Q1's cut-offs frequency.While to ensure that detection circuit 270 is coupled with control chip U1, also with good electrical isolation,
The 5th photoelectrical coupler OC5 can be provided between detection circuit 270 and control chip U1.5th photoelectrical coupler OC5 is used for will inspection
The direct current signal of the input of slowdown monitoring circuit 270 is transmitted in the way of photoelectricity, and is entered into control chip U1.
Preferably, detect that circuit 270 includes：3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6,
Seven resistance R7, the 8th electric capacity C8 and three terminal regulator U3.5th photoelectrical coupler OC5 includes：5th light emitting diode D9 and
Five phototriode T5.
One end of 3rd resistor R3 couples with one end of the first inductance L1, the other end of 3rd resistor R3 and the 4th resistance R4
One end coupling.The other end of the 4th resistance R4 is coupled with the other end of the 5th electric capacity C5.One end of 4th resistance R4 is also with
One end coupling of five resistance R5, the other end of the 5th resistance R5 is coupled with one end of the 8th electric capacity C8.8th electric capacity C8's is another
End couples with the negative electrode of three terminal regulator U3.The reference voltage end of three terminal regulator U3 is coupled with one end of the 4th resistance R4.Three
The anode of end voltage-stablizer U3 is coupled with the other end of the 4th resistance R4.The negative electrode of three terminal regulator U3 is also with the one of the 6th resistance R6
End coupling, the other end of the 6th resistance R6 is coupled respectively with one end of the first inductance L1 and one end of the 7th resistance R7.7th is electric
The other end of resistance R7 is coupled with the anode of the 5th light emitting diode D9, negative electrode and the three terminal regulator U3 of the 5th light emitting diode D9
Negative electrode coupling.The colelctor electrode of the 5th phototriode T5 is coupled with one end of the 3rd electric capacity C3, and the 5th phototriode T5
Emitter stage couple with the ground reference end of the 3rd electric capacity C3.
The direct current signal of the output of the second fairing 230 can be exported in detection circuit 270.By three terminal regulator U3
Voltage stabilizing, so as to by after voltage stabilizing direct current signal be input into the 5th light emitting diode D9.5th light emitting diode D9 will by lighting
The electric signal of input is converted to optical signal, and optionally, the 5th light emitting diode D9 can be infrarede emitting diode.5th is photosensitive
The optical signal that triode T5 is sent by the 5th light emitting diode D9 of reception, so as to convert optical signals to be exported after electric signal again
To the feedback voltage end FB of control chip U1.Stool and urine controllable FET Q1s of the control chip U1 according to the electric signal of feedback
Make-and-break time, so as to the frequency for adjusting output port BB ', output port CC ' and output port DD ' output pulse signals is formed
Stable signal output, so as to provide stable DC signal to metering module 220, control module 240 and communication module 260, enters
And stable be operated.
In the ammeter 200 of the offer of the present embodiment, above-mentioned Switching Power Supply 100 is applied to the ammeter 200.Due to first
Electrical isolation with 6KV between each secondary coil of transformer T1, and the primary coil and second of the second transformer T2
Between the secondary coil of transformer T2 also with 6KV electrical isolation, so as to metering module 220 and communication module 260 it is mutual it
Between just can have at least electrical isolation of 10KV.The second secondary coil dd ' of the first transformer T1 couples the second fairing
230, and the second fairing 230 is coupled with control module 240, so by the first transformer T1 realize external power source and
The electrical isolation of 6KV between control module 240.In the ammeter 200 of the present embodiment, communication module 260 is directly manipulated for personnel
Or the contact module of remote control.By by the original of the second secondary coil dd ' of the first transformer T1 and the second transformer T2
After the circle coupling of sideline, the secondary coil of the second transformer T2 is coupled with the 3rd rectifying and voltage-stabilizing device 250, the 3rd rectifying and voltage-stabilizing device
250 couple again with communication module 260, and then can realize the electrical isolation of 10KV between external power source and communication module 260, most
Limits improve the safety that personnel manipulate to it.Furthermore, due to control module 240 respectively with metering module 220 and communicate
Module 260 is coupled, so as to pass through the first photoelectrical coupler OC1 and the second light between communication module 260 and control module 240
Electric coupler OC2 realizes coupling.It is real by the first photoelectrical coupler OC1 and the photoelectricity transmission effect of the second photoelectrical coupler OC2
While having showed data interaction between control module 240 and communication module 260, due to its photoelectricity transmission effect, control is also achieved
Electrical isolation between molding block 240 and communication module 260.Further improve the manipulation security of communication module 260.And measure mould
Between block 220 and control module 240, then coupling can be realized by the 3rd photoelectrical coupler OC3 and the 4th photoelectrical coupler OC4
Close.By the photoelectricity transmission effect of the 3rd photoelectrical coupler OC3 and the 4th photoelectrical coupler OC4, realize control module 240 with
Between metering module 220 while data interaction, due to its photoelectricity transmission effect, control module 240 and metering mould are also achieved
Electrical isolation between block 220.The reliability and security for improving circuit can further be imitated.
In sum, the invention provides a kind of switching voltage 100 and the ammeter 200 using the Switching Power Supply 100, pass through
External power source is coupled with the primary coil of the first transformer T1, the original of the secondary coil of the first transformer T1 and the second transformer T2
Sideline circle coupling, the secondary coil of the second transformer T2 is coupled with load.
First transformer T1 is used for the secondary coil of the primary coil by the first transformer T1 and the first transformer T1
Galvanomagnetic-effect is transmitted, and is first voltage signal by the input voltage regulation of external power source, and by first voltage signal input
The primary coil of the second transformer.So that the secondary coil of the primary coil of the first transformer T1 and the first transformer T1 bears electricity
While pressure, external power source and the second transformer T2 electrical isolations.
Second transformer T2 is used for the secondary coil of the primary coil by the second transformer T2 and the second transformer T2
Galvanomagnetic-effect is transmitted, and is second voltage signal by first voltage Signal Regulation, and second voltage signal input is loaded, with
While making the primary coil of the second transformer T2 and the secondary coil of the second transformer T2 bear voltage, the first transformer with it is negative
On-board electrical is isolated.
First transformer T1 and the second transformer T2 connect, the voltage of input just can be assigned to the first transformer T1 and
Second transformer T2.The insulating materials that the secondary coil of the primary coil of the first transformer T1 and the first transformer T1 is provided with can
Ensure that the dielectric strength between the primary coil of the first transformer T1 and the secondary coil of the first transformer T1 reaches 6KV, can
Enough realize the electrical isolation of 6KV.And that the secondary coil of the primary coil of the second transformer T2 and the second transformer T2 is provided with is exhausted
Edge material ensure that the dielectric strength between the secondary coil of the primary coil of the second transformer T2 and the second transformer T2
6KV can be reached, i.e., can also realize the electrical isolation of 6KV.After first transformer T1 and the second transformer T2 series connection, input
Voltage just can be assigned to the first transformer T1 and the second transformer T2.And then the first transformer T1 and the second transformer T2 strings
The voltage within 12KV can be born after connection, and realizes electrical isolation.
The cascaded structure of the first transformer T1 and the second transformer T2 is applied in ammeter 200, and ammeter 200 becomes by first
The series connection of depressor T1 and the second transformer T2 and realize at least 10KV electric pressures between the input power and ammeter 200 of outside
Electrical isolation, and then the insulation values of ammeter 200 are significantly improve, so that ammeter 200 bears higher pulse voltage.
The preferred embodiments of the present invention are the foregoing is only, the present invention is not limited to, for the skill of this area
For art personnel, the present invention can have various modifications and variations.It is all within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of Switching Power Supply, it is characterised in that include：First transformer and the second transformer；External power source and described first
The primary coil coupling of transformer, the secondary coil of first transformer is coupled with the primary coil of second transformer,
The secondary coil of second transformer is coupled with load；
First transformer is used for the secondary coil of the primary coil by first transformer and first transformer
Galvanomagnetic-effect be first voltage signal by the input voltage regulation of the external power source, and by the first voltage signal input
The primary coil of second transformer, so that the external power source and the second transformer electrical isolation；
Second transformer is used for the secondary coil of the primary coil by second transformer and second transformer
Galvanomagnetic-effect be second voltage signal by the first voltage Signal Regulation, and by the second voltage signal output to described
Load, so that first transformer is isolated with the load electrical.
2. Switching Power Supply according to claim 1, it is characterised in that also include：Pulse control circuit and switch module, institute
Stating switch module includes：First contact, the second contact and control end, the output end of the pulse control circuit and the control end
Coupling, first contact couples with the primary coil of first transformer, and second contact couples with reference voltage end.
3. Switching Power Supply according to claim 2, it is characterised in that the primary coil bag of first transformer
Include：First primary coil and the second primary coil, one end of first primary coil couples with the external power source, and described
The other end of one primary coil and first coupling contact points, one end and second contact coupling of second primary coil
Close, the other end of second primary coil is coupled with the power end of the pulse control circuit.
4. Switching Power Supply according to claim 3, it is characterised in that the switch module includes FET, the field
The grid of effect pipe is the control end, and the drain electrode of the FET is first contact, the source electrode of the FET
For second contact.
5. a kind of ammeter characterized in that, including：Metering module, communication module, control module and such as claim 1-4 are arbitrary
Switching Power Supply described in, the input of the input of the metering module and the control module with first transformer
Secondary coil coupling；The secondary coil of second transformer is coupled with the communication module, the communication module with it is described
Control module is coupled.
6. ammeter according to claim 5, it is characterised in that the secondary coil of first transformer includes：First is secondary
Sideline is enclosed and the second secondary coil, first secondary coil and second secondary coil with the institute of first transformer
Primary coil coupling is stated, the input of the metering module is coupled with first secondary coil, the input of the control module
End couples with second secondary coil, and second secondary coil is coupled with the primary coil of second transformer.
7. ammeter according to claim 5, it is characterised in that the communication module passes through the first light with the control module
Electric coupler and the second photoelectrical coupler are coupled, and first photoelectrical coupler includes：First light emitting diode and first photosensitive
Triode；The two ends of first light emitting diode couple with the output end of the control module, first photosensitive three pole
The collector terminal and emitter terminal of pipe is coupled with the input of the communication module；Second photoelectrical coupler includes：The
Two light emitting diodes and the second phototriode；The two ends of second light emitting diode with the output end of the communication module
Coupling, the collector terminal and emitter terminal of second phototriode are coupled with the input of the control module.
8. ammeter according to claim 5, it is characterised in that also include：Detection circuit, the input of the detection circuit
Couple with the input of the control module, the input coupling of the output end and the pulse control circuit for detecting circuit
Close.
9. ammeter according to claim 5, it is characterised in that also include：Rectification module and Voltage stabilizing module, the rectification mould
The input of block is coupled with the secondary coil of second transformer, the output end of the rectification module and the Voltage stabilizing module
Input is coupled, and the output end of the Voltage stabilizing module is coupled with the communication module.
10. a kind of electrical isolation method, it is characterised in that the Switching Power Supply being applied to as described in any one of claim 1-4, institute
The method of stating includes：
First transformer is used for the electricity by the primary coil of first transformer and the secondary coil of first transformer
The input voltage regulation of external power source is first voltage signal by magnetic effect, and by the transformation of first voltage signal input second
The primary coil of device, so that the external power source and the second transformer electrical isolation；
Second transformer is used for the secondary coil of the primary coil by second transformer and second transformer
Galvanomagnetic-effect by the first voltage Signal Regulation be second voltage signal, and by the second voltage signal output to bear
Carry, so that first transformer is isolated with the load electrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610700515.1A CN106685211A (en) | 2016-08-22 | 2016-08-22 | Switching power supply, electrical isolation method and ammeter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610700515.1A CN106685211A (en) | 2016-08-22 | 2016-08-22 | Switching power supply, electrical isolation method and ammeter |
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| CN106685211A true CN106685211A (en) | 2017-05-17 |
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| CN201610700515.1A Pending CN106685211A (en) | 2016-08-22 | 2016-08-22 | Switching power supply, electrical isolation method and ammeter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108173432A (en) * | 2017-12-29 | 2018-06-15 | 珠海格力智能装备技术研究院有限公司 | Switching power circuit and industrial gateway system |
| CN108199821A (en) * | 2017-09-27 | 2018-06-22 | 青岛鼎信通讯股份有限公司 | A kind of magnetic coupling half duplex communication integrated circuit of band isolation power supply |
| WO2022141762A1 (en) * | 2020-12-31 | 2022-07-07 | 维谛技术(西安)有限公司 | Power level acquisition circuit and apparatus |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7256553B1 (en) * | 2006-09-08 | 2007-08-14 | Lien Chang Electronic Enterprise Co., Ltd. | Lamp driving system controlled by electrical isolation |
| CN201765273U (en) * | 2010-06-25 | 2011-03-16 | 洪金文 | Ammeter and power supply for same |
| CN102097949A (en) * | 2011-01-07 | 2011-06-15 | 上海新进半导体制造有限公司 | Switching power supply and controlling method thereof |
| CN103078511A (en) * | 2012-11-30 | 2013-05-01 | 天津市松正电动汽车技术股份有限公司 | Flyback power supply circuit |
| CN103166471A (en) * | 2011-12-19 | 2013-06-19 | 比亚迪股份有限公司 | Switching power supply, control method of switching power supply and control chip |
| CN103208934A (en) * | 2012-01-11 | 2013-07-17 | 成都启臣微电子有限公司 | Pulse width modulation switching power supply controller and switching power supply |
| CN203929881U (en) * | 2014-04-23 | 2014-11-05 | 深圳市锐能微科技有限公司 | A kind of electric energy computation chip and intelligent electric meter card spacer assembly |
| CN104201897A (en) * | 2014-08-31 | 2014-12-10 | 广州金升阳科技有限公司 | Dynamic process detection method and fast response circuit of switching power supply |
| CN204361923U (en) * | 2014-12-23 | 2015-05-27 | 淄博山大奥太电气有限公司 | With the Switching Power Supply of Multiple isolated outputs |
| CN205992856U (en) * | 2016-08-22 | 2017-03-01 | 武汉盛帆电子股份有限公司 | Switching power supply and ammeter |
-
2016
- 2016-08-22 CN CN201610700515.1A patent/CN106685211A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7256553B1 (en) * | 2006-09-08 | 2007-08-14 | Lien Chang Electronic Enterprise Co., Ltd. | Lamp driving system controlled by electrical isolation |
| CN201765273U (en) * | 2010-06-25 | 2011-03-16 | 洪金文 | Ammeter and power supply for same |
| CN102097949A (en) * | 2011-01-07 | 2011-06-15 | 上海新进半导体制造有限公司 | Switching power supply and controlling method thereof |
| CN103166471A (en) * | 2011-12-19 | 2013-06-19 | 比亚迪股份有限公司 | Switching power supply, control method of switching power supply and control chip |
| CN103208934A (en) * | 2012-01-11 | 2013-07-17 | 成都启臣微电子有限公司 | Pulse width modulation switching power supply controller and switching power supply |
| CN103078511A (en) * | 2012-11-30 | 2013-05-01 | 天津市松正电动汽车技术股份有限公司 | Flyback power supply circuit |
| CN203929881U (en) * | 2014-04-23 | 2014-11-05 | 深圳市锐能微科技有限公司 | A kind of electric energy computation chip and intelligent electric meter card spacer assembly |
| CN104201897A (en) * | 2014-08-31 | 2014-12-10 | 广州金升阳科技有限公司 | Dynamic process detection method and fast response circuit of switching power supply |
| CN204361923U (en) * | 2014-12-23 | 2015-05-27 | 淄博山大奥太电气有限公司 | With the Switching Power Supply of Multiple isolated outputs |
| CN205992856U (en) * | 2016-08-22 | 2017-03-01 | 武汉盛帆电子股份有限公司 | Switching power supply and ammeter |
Non-Patent Citations (3)
| Title |
|---|
| 于庆广;张宁;: "三相四线制数字电表专用电源的设计和实现", no. 12 * |
| 杨丽华;丁黎;汪旭祥;李莉;: "基于开关电源的低功耗单相智能电表设计与研究", no. 3, pages 57 - 59 * |
| 黄燕编著: "《开关电源故障检修方法》", 31 January 2004, 国防工业出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108199821A (en) * | 2017-09-27 | 2018-06-22 | 青岛鼎信通讯股份有限公司 | A kind of magnetic coupling half duplex communication integrated circuit of band isolation power supply |
| CN108173432A (en) * | 2017-12-29 | 2018-06-15 | 珠海格力智能装备技术研究院有限公司 | Switching power circuit and industrial gateway system |
| WO2022141762A1 (en) * | 2020-12-31 | 2022-07-07 | 维谛技术(西安)有限公司 | Power level acquisition circuit and apparatus |
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