CN109245289A - Low view based on double switch power power supply electric energy meter carries power control circuit - Google Patents
Low view based on double switch power power supply electric energy meter carries power control circuit Download PDFInfo
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- CN109245289A CN109245289A CN201811279643.9A CN201811279643A CN109245289A CN 109245289 A CN109245289 A CN 109245289A CN 201811279643 A CN201811279643 A CN 201811279643A CN 109245289 A CN109245289 A CN 109245289A
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- 230000003750 conditioning effect Effects 0.000 claims abstract description 54
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 230000008878 coupling Effects 0.000 claims description 26
- 238000010168 coupling process Methods 0.000 claims description 26
- 238000005859 coupling reaction Methods 0.000 claims description 26
- 230000009977 dual effect Effects 0.000 claims description 24
- 239000003990 capacitor Substances 0.000 claims description 16
- 230000005611 electricity Effects 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 4
- 230000001629 suppression Effects 0.000 claims 1
- 230000003044 adaptive effect Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
-
- 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
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
-
- 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
-
- 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 low views based on double switch power power supply electric energy meter to carry power control circuit, it include: voltage detecting circuit, reference circuit, signal conditioning circuit, power supply circuit and switching circuit, voltage detecting circuit detection master, the threshold size of the output voltage of the output end of auxiliary power supply, the threshold size for the output voltage that the reference circuit is detected according to the voltage detecting circuit, benchmark signal is provided for the signal conditioning circuit, the control signal of switching circuit is generated after the benchmark signal condition that the signal conditioning circuit is provided by the reference circuit, the power supply circuit is as the reference circuit, the power supply of the switching circuit, the control signal that the switching circuit receives signal conditioning circuit generation carries out reducing power consumption to the main power source.By the above-mentioned means, can be realized the requirement that adaptive different voltage and power grade carry power consumption to low view, different elements is selected without changing according to different size, while achieving the purpose that reducing view carries power consumption.
Description
Technical field
The present invention relates to technical field of electric power, carry more particularly to a kind of low view based on double switch power power supply electric energy meter
Power control circuit.
Background technique
With intelligent electric meter increasingly extensive application in the world, domestic ammeter producer goes abroad one after another, external
It is more stringent to the technical requirement of electric energy meter, wherein wider, higher voltage is defeated to the requirements at the higher level that propose of power supply
Enter, lower power supply power consumption requirement.
IEC (International Electrotechnical Commission, International Electrotechnical Commission) 62053 is marked
Standard clearly provides for the electric energy meter for the dual power supply for having main power source, auxiliary power supply, under conditions of nominal operation, to main electricity
The requirement that there is 0.5VA (Volt-ampere, volt-ampere) (it is single-phase that three-phase powers on finger) in source depending on carrying power consumption.To requiring wide input voltage model
The electric energy meter of power supply is enclosed, Switching Power Supply mode is usually selected, due to control chip and some EMC (Electro Magnetic
Compatibility, Electro Magnetic Compatibility) protective device there are biggish power consumption, is difficult to meet main power source under the conditions of high input voltage
Requirement depending on carrying 0.5VA, and each producer is to improve brand strength, all can all one's effort product key technical index accomplished into pole
Limit reduces view and carries power consumption.
The low view of common application currently on the market carries power consumption technology scheme, comprising: reduces on main power source and even cancels peace
Capacitor is advised, idle power consumption is reduced；Or increase differential mode inductance, reduce rectification storage capacitor, increases PF (power Factor, power
Factor) value；Or select the control chip of low-power and increase divider resistance etc., reduce active power consumption etc..But these schemes exist
The problem of be: versatility is not strong, when requiring for different input voltages and power grade, need to often select different elements；It needs
Comprehensively consider properties of product, is difficult to be reduced to reasonable limit value depending on carrying power consumption.
Summary of the invention
It is an object of the invention to propose that a kind of low view based on double switch power power supply electric energy meter carries power control circuit,
It can be realized the requirement that adaptive different voltage and power grade carry power consumption to low view, without changing choosing according to different size not
Same element, while achieving the purpose that reducing view carries power consumption.
According to an aspect of the present invention, a kind of low view load power consumption control based on double switch power power supply electric energy meter is provided
Circuit, comprising:
Voltage detecting circuit, reference circuit, signal conditioning circuit, power supply circuit and switching circuit；
One end of the voltage detecting circuit is connected with the dual power supply output end of main power source, auxiliary power supply, the voltage inspection
The other end of slowdown monitoring circuit is connected with the signal conditioning circuit, one end of the reference circuit and the signal conditioning circuit phase
Connection, the other end of the reference circuit are connect with the power supply circuit, one end of the signal conditioning circuit and the voltage
Detection circuit is connected, and the other end of the signal conditioning circuit is connected with the reference circuit, and the one of the power supply circuit
End is respectively connected with the reference circuit, the switching circuit, the other end of the power supply circuit and main power source, auxiliary power supply
Dual power supply output end is connected, and the input terminal of the switching circuit divides with the signal conditioning circuit, the power supply circuit respectively
It is not connected, the output end of the switching circuit is connected with the main power source；
The voltage detecting circuit detect the main power source, the auxiliary power supply dual power supply output end output voltage threshold
It is worth size, the threshold size for the output voltage that the reference circuit is detected according to the voltage detecting circuit, is described
Signal conditioning circuit provides benchmark signal, and the signal conditioning circuit is believed by the benchmark that the reference circuit provides
The control signal of the switching circuit is generated after number conditioning, the power supply circuit is electric as the reference circuit, the switch
The power supply on road, the switching circuit receive the control signal that the signal conditioning circuit generates and drop to the main power source
Power consumption.
Wherein, one end of the voltage detecting circuit is directly connected with the output end of the auxiliary power supply, the voltage inspection
The other end of slowdown monitoring circuit is connected with the signal conditioning circuit, and the voltage detecting circuit detects the output end of the auxiliary power supply
Output voltage threshold size.
Wherein, the voltage detecting circuit, comprising:
First current-limiting resistance, the second current-limiting resistance and filter capacitor；
One end of first current-limiting resistance and the main power source, the dual power supply output end of the auxiliary power supply or directly and institute
The output end for stating auxiliary power supply is connected, and the other end of first current-limiting resistance is connected with one end of second current-limiting resistance
It connects, the other end ground connection of second current-limiting resistance, the filter capacitor is connected in parallel on second current-limiting resistance both ends, wherein
The main power source, the auxiliary power supply dual power supply output end be set in voltage detecting point；
First current-limiting resistance, second current-limiting resistance detect the size of the voltage detecting point, the filtered electrical
Hold and inhibit signal interference, guarantees the reliability of the size of the voltage detecting point of the detection.
Wherein, the reference circuit, comprising:
Third current-limiting resistance and voltage-stabilizing device；
One end of the third current-limiting resistance is connected with the dual power supply output end of the main power source, the auxiliary power supply, institute
The other end for stating third current-limiting resistance is connected with the voltage-stabilizing device；
The third current-limiting resistance gives the voltage-stabilizing device current limliting, and the voltage-stabilizing device is examined according to the voltage detecting circuit
The threshold size for the output voltage measured provides benchmark signal for the signal conditioning circuit.
Wherein, the signal conditioning circuit, comprising:
4th current-limiting resistance and comparator；
One end of the input pin of the comparator connects first current-limiting resistance and the institute of the voltage detecting circuit
The tie point of the second current-limiting resistance is stated, the other end of the input pin of the comparator is connected with the reference edge of the reference circuit
It connects.
Wherein, the power supply circuit, comprising:
Linear voltage regulator and storage capacitor；
The input terminal of the linear voltage regulator is connected with the dual power supply output end of the main power source, the auxiliary power supply, institute
The output end for stating linear voltage regulator is connected to the ground by the storage capacitor；
The linear voltage regulator exports the pull-up and confession respectively as the signal conditioning circuit, the switching circuit simultaneously
Power supply.
Wherein, the switching circuit, comprising:
Triode, the 5th current-limiting resistance, the 6th current-limiting resistance, the 7th current-limiting resistance and light coupling relay；
The comparator output phase that the ground level of the triode passes through the 5th current-limiting resistance and the signal conditioning circuit
Even, the cathode for the light emitting diode of the emitting stage and light coupling relay of the triode once surveyed is connected, the triode
Collector pulls down to ground by the 6th current-limiting resistance, and secondary side one end of the light coupling relay, the other end are used as output
End, the 7th current-limiting resistance are connected with the secondary side other end of the light coupling relay；
The secondary side of the light coupling relay selects normally closed, and output is as the switching main power source low power consumpting state control
System carries out reducing power consumption to the main power source.
Wherein, the voltage-stabilizing device is TL431 type voltage-stablizer or fiducial chip.
Wherein, the triode is plug and play type triode.
Wherein, the light coupling relay is electromagnetic relay.
It can be found that above scheme, voltage detecting circuit can detecte main power source, auxiliary power supply dual power supply output end it is defeated
The threshold size of voltage out, reference circuit can according to the threshold size for the output voltage that the voltage detecting circuit detects,
Benchmark signal is provided for signal conditioning circuit, the benchmark which can provide by the reference circuit
The control signal of switching circuit is generated after signal condition, power supply circuit can be used as the power supply of the reference circuit, switching circuit
Power supply, the control signal which can receive signal conditioning circuit generation carry out reducing power consumption to the main power source, can
Realize that adaptive different voltage and power grade carry the requirement of power consumption to low view, without changed according to different size select it is different
Element, while achieving the purpose that reducing view carries power consumption.
Further, above scheme can monitor main power source, the voltage swing of auxiliary power supply output provides control signal and takes
Power consumption is carried to reduce view by simple adjusting device for tradition, on the one hand control is simple, and meets adaptive Width funtion specification,
On the other hand by changing the operating mode of control chip, reduce the stress impact of key hardware, improve the reliability of product
And service life.
Further, above scheme can be isolated using vulnerabilities scan forceful electric power and with controlled circuit, can be improved anti-interference
Ability.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is that the present invention is based on the structures that the low view of double switch power power supply electric energy meter carries one embodiment of power control circuit
Schematic diagram；
Fig. 2 is that the present invention is based on the low views of double switch power power supply electric energy meter to carry the specific of one embodiment of power control circuit
Circuit diagram.
Specific embodiment
With reference to the accompanying drawings and examples, the present invention is described in further detail.It is emphasized that following implement
Example is merely to illustrate the present invention, but is not defined to the scope of the present invention.Likewise, following embodiment is only portion of the invention
Point embodiment and not all embodiments, institute obtained by those of ordinary skill in the art without making creative efforts
There are other embodiments, shall fall within the protection scope of the present invention.
The present invention provides a kind of low view load power control circuit based on double switch power power supply electric energy meter, can be realized certainly
The requirement that different voltage and power grade carry power consumption to low view is adapted to, selects different elements without changing according to different size,
Achieving the purpose that simultaneously, which reduces view, carries power consumption.
Referring to Figure 1 and Fig. 2, Fig. 1 are that the present invention is based on the low views of double switch power power supply electric energy meter to carry power consumption control electricity
The structural schematic diagram of one embodiment of road, Fig. 2 are that the present invention is based on the low views of double switch power power supply electric energy meter to carry power consumption control electricity
The physical circuit schematic diagram of one embodiment of road.As depicted in figs. 1 and 2, it should be carried based on the low view of double switch power power supply electric energy meter
Power control circuit 10 includes: voltage detecting circuit 11, reference circuit 12, signal conditioning circuit 13, power supply circuit 14 and switch
Circuit 15.
One end of the voltage detecting circuit 11 is connected with the dual power supply output end of main power source, auxiliary power supply, the voltage detecting
The other end of circuit 11 is connected with the signal conditioning circuit 13, one end of the reference circuit 12 and 13 phase of signal conditioning circuit
Connection, the other end of the reference circuit 12 are connect with the power supply circuit 14, and one end of the signal conditioning circuit 13 and the voltage are examined
Slowdown monitoring circuit 11 is connected, and the other end of the signal conditioning circuit 13 is connected with the reference circuit 12, and the one of the power supply circuit 14
End is respectively connected with the reference circuit 12, the switching circuit 15, the other end of the power supply circuit 14 and main power source, auxiliary power supply
Dual power supply output end is connected, and the input terminal of the switching circuit 15 divides with the signal conditioning circuit 13, the power supply circuit 14 respectively
It is not connected, the output end of the switching circuit 15 is connected with the main power source.
The voltage detecting circuit 11 detect the main power source, the auxiliary power supply dual power supply output end output voltage threshold value it is big
It is small, the threshold size for the output voltage which detects according to the voltage detecting circuit 11, for the signal condition
Circuit 13 provides benchmark signal, which passes through the benchmark signal condition that the reference circuit 12 provides
The control signal of the switching circuit 15 is generated later, the confession of the power supply circuit 14 as the reference circuit 12, the switching circuit 15
Power supply, the switching circuit 15 receive the control signal that the signal conditioning circuit 13 generates and carry out reducing power consumption to the main power source.
Optionally, one end of the voltage detecting circuit 11 can directly be connected with the output end of the auxiliary power supply, the voltage
The other end of detection circuit 11 is connected with the signal conditioning circuit 13, which detects the output of the auxiliary power supply
The threshold size of the output voltage at end.
Optionally, the voltage detecting circuit 11 may include:
First current-limiting resistance R1, the second current-limiting resistance R2 and filter capacitor C1；
One end of first current-limiting resistance R1 and the main power source, the dual power supply output end of the auxiliary power supply or directly with the auxiliary electricity
The output end in source is connected, and the other end of first current-limiting resistance R1 is connected with one end of second current-limiting resistance R2, this
The other end of two current-limiting resistance R2 is grounded, and filter capacitor C1 is connected in parallel on the both ends the second current-limiting resistance R2, wherein the main electricity
Source, the auxiliary power supply dual power supply output end be set on voltage detecting point V；
First current-limiting resistance R1, second current-limiting resistance R2 detect the size of voltage detecting point V, filter capacitor C1
Inhibit signal interference, guarantees the reliability of the size of the voltage detecting point V of the detection.
Optionally, the reference circuit 12 may include:
Third current-limiting resistance R3 and voltage-stabilizing device U2；
One end of third current-limiting resistance R3 is connected with the dual power supply output end of the main power source, the auxiliary power supply, the third
The other end of current-limiting resistance R3 is connected with voltage-stabilizing device U2；
The third current-limiting resistance R3 gives voltage-stabilizing device U2 current limliting, and voltage-stabilizing device U2 is examined according to the voltage detecting circuit 11
The threshold size for the output voltage measured provides benchmark signal for the signal conditioning circuit 13.
Optionally, voltage-stabilizing device U2 can be TL431 type voltage-stablizer or fiducial chip etc., and the present invention is not limited
It is fixed.
Optionally, the signal conditioning circuit 13 may include:
4th current-limiting resistance R4 and comparator U3；
One end of the input pin of comparator U3 connects the first current-limiting resistance R1 of the voltage detecting circuit 11 and is somebody's turn to do
The other end of the tie point of second current-limiting resistance R2, the input pin of comparator U3 is connected with the reference edge of the reference circuit 12
It connects.
Optionally, the power supply circuit 14 may include:
Linear voltage regulator U1 and storage capacitor C2；
The input terminal of linear voltage regulator U1 is connected with the dual power supply output end of the main power source, the auxiliary power supply, this is linear
The output end of voltage-stablizer U1 is connected to the ground by storage capacitor C2；
Linear voltage regulator U1 exports the pull-up and confession respectively as the signal conditioning circuit 13, the switching circuit 15 simultaneously
Power supply.
Optionally, the switching circuit 15 may include:
Triode T1, the 5th current-limiting resistance R5, the 6th current-limiting resistance R6, the 7th current-limiting resistance R7 and light coupling relay U4；
The ground level of triode T1 is exported by the comparator U3 of the 5th current-limiting resistance R5 and the signal conditioning circuit 13
It is connected, the cathode for the light emitting diode of the emitting stage and light coupling relay U4 of triode T1 once surveyed is connected, the triode
The collector of T1 pulls down to ground by the 6th current-limiting resistance R6, and secondary side one end A, the other end B of light coupling relay U4 makees
For output end, the 7th current-limiting resistance R7 is connected with the secondary side other end B of light coupling relay U4；
The secondary side of light coupling relay U4 selects normally closed, and output is as the switching main power source low power consumpting state control
System carries out reducing power consumption to the main power source.
Optionally, triode T1 can be PNP (Plug-and-Play, plug and play) type triode, and the present invention is not added
To limit.
Optionally, light coupling relay U4 can be electromagnetic relay, and the present invention is not limited.
In the present embodiment, the worked of power control circuit 10 should be carried based on the low view of double switch power power supply electric energy meter
Journey may include:
The voltage detecting circuit 11 detects output voltage V by the first current-limiting resistance R1 and the second current-limiting resistance R2
Size；The reference circuit 12 generates a reference voltage example using voltage-stabilizing device U2 such as fiducial chip or TL431 type voltage-stablizer
For example 2.5V (volt)；Comparator U3 is used inside the signal conditioning circuit 13, generates the movement letter of the switching circuit 15
Number；Output of the power input of the power supply circuit 14 from the auxiliary power supply, can be using the linear voltage regulator of an output 5V
U1 comes for the signal conditioning circuit 13 and the switching circuit 15 power supply；Triode T1 in the switching circuit 15 is used to discharge this
The driving current of light coupling relay U4, light coupling relay U4 are used to use vulnerabilities scan forceful electric power, independently power in the main power source
In the case where, light coupling relay U4 is normally closed mode.
When in the present embodiment, based on double switch power power supply electric energy meter design, in the feelings for having main power source, auxiliary power supply power supply
Under condition, it is desirable that auxiliary power supply is preferentially powered, that is, require main power source, the output of auxiliary power supply voltage V in different size, i.e. main power source
Output voltage is less than the output voltage of auxiliary power supply, i.e. V (main power source) < V (auxiliary power supply).
In the present embodiment, when the negative input end of the comparator U3 of the signal conditioning circuit 13 detects V > VREF* (R1
+ R2)/R1 when, wherein the VREF refers to reference voltage, and comparator U3 exports low level signal, in the switching circuit 15 this three
Pole pipe T1 conducting, the Light-Emitting Diode that light coupling relay U4 is once surveyed can pass through the inductance excitation in light coupling relay U4
It is attracted to be connected, light coupling relay U4 secondary side will become normally open by normally off, cut off the main power circuit, drop
Low-power consumption.
In the present embodiment, when the negative input end of the comparator U3 of the signal conditioning circuit 13 detects V≤VREF*
(R1+R2)/R1 when, the output end of comparator U3 has pull-up resistor to power supply, and comparator U3 exports high level signal, this is opened
Triode T1 cut-off in powered-down road 15, the Light-Emitting Diode cut-off that light coupling relay U4 is once surveyed, the light coupling relay
The state that the secondary side of U4 will keep original is failure to actuate, which works normally.
In the present embodiment, the low of electric energy meter should be powered based on double switch power can be at this depending on carrying power control circuit 10
In the case that main power source, auxiliary power supply two-way power supply all power on, pass through the output of detection main power source, the dual power supply output end of auxiliary power supply
The threshold size of voltage reduces to turn off the control chip of the main power source or control chip is made to be in extremely low power dissipation mode
Active power consumption, while achieving the purpose that reducing view carries.
In the present embodiment, it should be taken based on the low power supply depending on carrying power control circuit 10 of double switch power power supply electric energy meter
From the auxiliary power supply, cut off the main power source not and will increase the power consumption of the main power source, this based on double switch power power supply electric energy meter
After low view carries the work of power control circuit 10, view can be greatly reduced and carry power consumption.
It can be found that in the present embodiment, voltage detecting circuit can detecte the dual power supply output end of main power source, auxiliary power supply
Output voltage threshold size, reference circuit can be big according to the threshold value for the output voltage that the voltage detecting circuit detects
It is small, benchmark signal is provided for signal conditioning circuit, the comparison which can provide by the reference circuit
The control signal of switching circuit is generated after reference signal conditioning, power supply circuit can be used as the reference circuit, switching circuit
Power supply, the control signal which can receive signal conditioning circuit generation carry out reducing power consumption to the main power source,
It can be realized the requirement that adaptive different voltage and power grade carry power consumption to low view, without changing choosing according to different size not
Same element, while achieving the purpose that reducing view carries power consumption.
Further, in the present embodiment, main power source can be monitored, the voltage swing of auxiliary power supply output provides control signal
And tradition is replaced to carry power consumption by simple adjusting device to reduce view, on the one hand control is simple, and meets adaptive Width funtion
Specification reduces the stress impact of key hardware, improve product can on the other hand by changing the operating mode of control chip
By property and service life.
Further, in the present embodiment, it can be isolated using vulnerabilities scan forceful electric power and with controlled circuit, can be improved anti-
Interference performance.
It should be understood by those ordinary skilled in the art that: the discussion of any of the above embodiment is exemplary only, not
It is intended to imply that the scope of the present disclosure (including claim) is limited to these examples；Under thinking of the invention, above embodiments
Or can also be combined between the technical characteristic in different embodiments, step can be realized with random order, and be existed such as
Many other variations of the upper different aspect of the invention, for simplicity, they are not provided in details.
In addition, to simplify explanation and discussing, and in order not to obscure the invention, it can in provided attached drawing
It is connect with showing or can not show with the well known power ground of integrated circuit (IC) chip and other components.Furthermore, it is possible to
Device is shown in block diagram form, to avoid obscuring the invention, and this has also contemplated following facts, i.e., about this
The details of the embodiment of a little block diagram arrangements be height depend on will implementing platform of the invention (that is, these details should
It is completely within the scope of the understanding of those skilled in the art).Elaborating that detail (for example, circuit) is of the invention to describe
In the case where exemplary embodiment, it will be apparent to those skilled in the art that can be in these no details
In the case where or implement the present invention in the case that these details change.Therefore, these descriptions should be considered as explanation
Property rather than it is restrictive.
Although having been incorporated with specific embodiments of the present invention, invention has been described, according to retouching for front
It states, many replacements of these embodiments, modifications and variations will be apparent for those of ordinary skills.Example
Such as, discussed embodiment can be used in other memory architectures (for example, dynamic ram (DRAM)).
The embodiment of the present invention be intended to cover fall into all such replacements within the broad range of appended claims,
Modifications and variations.Therefore, all within the spirits and principles of the present invention, any omission, modification, equivalent replacement, the improvement made
Deng should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of low view based on double switch power power supply electric energy meter carries power control circuit characterized by comprising
Voltage detecting circuit, reference circuit, signal conditioning circuit, power supply circuit and switching circuit；
One end of the voltage detecting circuit is connected with the dual power supply output end of main power source, auxiliary power supply, the voltage detecting electricity
The other end on road is connected with the signal conditioning circuit, and one end of the reference circuit is connected with the signal conditioning circuit
It connects, the other end of the reference circuit is connect with the power supply circuit, and one end of the signal conditioning circuit and the voltage are examined
Slowdown monitoring circuit is connected, and the other end of the signal conditioning circuit is connected with the reference circuit, one end of the power supply circuit
It is respectively connected with the reference circuit, the switching circuit, pair of the other end and main power source, auxiliary power supply of the power supply circuit
Power output end is connected, and the input terminal of the switching circuit is distinguished with the signal conditioning circuit, the power supply circuit respectively
It is connected, the output end of the switching circuit is connected with the main power source；
The voltage detecting circuit detect the main power source, the auxiliary power supply dual power supply output end output voltage threshold value it is big
Small, the threshold size for the output voltage that the reference circuit is detected according to the voltage detecting circuit is the signal
Conditioning circuit provides benchmark signal, the benchmark signal tune that the signal conditioning circuit is provided by the reference circuit
Generate the control signal of the switching circuit after reason, the power supply circuit is as the reference circuit, the switching circuit
Power supply, the switching circuit receive the control signal that the signal conditioning circuit generates and carry out drop function to the main power source
Consumption.
2. the low view as described in claim 1 based on double switch power power supply electric energy meter carries power control circuit, feature exists
In, one end of the voltage detecting circuit is directly connected with the output end of the auxiliary power supply, the voltage detecting circuit it is another
One end is connected with the signal conditioning circuit, and the voltage detecting circuit detects the output voltage of the output end of the auxiliary power supply
Threshold size.
3. the low view as claimed in claim 1 or 2 based on double switch power power supply electric energy meter carries power control circuit, feature
It is, the voltage detecting circuit, comprising:
First current-limiting resistance, the second current-limiting resistance and filter capacitor；
One end of first current-limiting resistance and the main power source, the dual power supply output end of the auxiliary power supply or directly with it is described auxiliary
The output end of power supply is connected, and the other end of first current-limiting resistance is connected with one end of second current-limiting resistance, institute
The other end ground connection of the second current-limiting resistance is stated, the filter capacitor is connected in parallel on second current-limiting resistance both ends, wherein the master
Power supply, the auxiliary power supply dual power supply output end be set in voltage detecting point；
First current-limiting resistance, second current-limiting resistance detect the size of the voltage detecting point, the filter capacitor suppression
Signal interference processed guarantees the reliability of the size of the voltage detecting point of the detection.
4. the low view as claimed in claim 3 based on double switch power power supply electric energy meter carries power control circuit, feature exists
In the reference circuit, comprising:
Third current-limiting resistance and voltage-stabilizing device；
One end of the third current-limiting resistance is connected with the dual power supply output end of the main power source, the auxiliary power supply, and described
The other end of three current-limiting resistances is connected with the voltage-stabilizing device；
The third current-limiting resistance gives the voltage-stabilizing device current limliting, and the voltage-stabilizing device is detected according to the voltage detecting circuit
The output voltage threshold size, provide benchmark signal for the signal conditioning circuit.
5. the low view as claimed in claim 4 based on double switch power power supply electric energy meter carries power control circuit, feature exists
In the signal conditioning circuit, comprising:
4th current-limiting resistance and comparator；
One end of the input pin of the comparator connects first current-limiting resistance and described of the voltage detecting circuit
The tie point of two current-limiting resistances, the other end of the input pin of the comparator are connected with the reference edge of the reference circuit.
6. the low view as claimed in claim 5 based on double switch power power supply electric energy meter carries power control circuit, feature exists
In the power supply circuit, comprising:
Linear voltage regulator and storage capacitor；
The input terminal of the linear voltage regulator is connected with the dual power supply output end of the main power source, the auxiliary power supply, the line
The output end of property voltage-stablizer is connected to the ground by the storage capacitor；
The linear voltage regulator is exported simultaneously respectively as the signal conditioning circuit, the pull-up of the switching circuit and power supply electricity
Source.
7. the low view as claimed in claim 6 based on double switch power power supply electric energy meter carries power control circuit, feature exists
In the switching circuit, comprising:
Triode, the 5th current-limiting resistance, the 6th current-limiting resistance, the 7th current-limiting resistance and light coupling relay；
The ground level of the triode is connected by the 5th current-limiting resistance with the output of the comparator of the signal conditioning circuit, institute
The cathode for stating the emitting stage of triode and the light emitting diode of light coupling relay once surveyed is connected, the collector of the triode
With pulling down to by the 6th current-limiting resistance, secondary side one end of the light coupling relay, the other end are described as output end
7th current-limiting resistance is connected with the secondary side other end of the light coupling relay；
The secondary side of the light coupling relay selects normally closed, and output is controlled as the main power source low power consumpting state is switched,
Reducing power consumption is carried out to the main power source.
8. the low view as claimed in claim 4 based on double switch power power supply electric energy meter carries power control circuit, feature exists
In the voltage-stabilizing device is TL431 type voltage-stablizer or fiducial chip.
9. the low view as claimed in claim 7 based on double switch power power supply electric energy meter carries power control circuit, feature exists
In the triode is plug and play type triode.
10. the low view as claimed in claim 7 based on double switch power power supply electric energy meter carries power control circuit, feature exists
In the light coupling relay is electromagnetic relay.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811279643.9A CN109245289B (en) | 2018-10-30 | 2018-10-30 | Low-video-load power consumption control circuit based on double-switch power supply electric energy meter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811279643.9A CN109245289B (en) | 2018-10-30 | 2018-10-30 | Low-video-load power consumption control circuit based on double-switch power supply electric energy meter |
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| CN109245289A true CN109245289A (en) | 2019-01-18 |
| CN109245289B CN109245289B (en) | 2023-12-22 |
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| CN201811279643.9A Active CN109245289B (en) | 2018-10-30 | 2018-10-30 | Low-video-load power consumption control circuit based on double-switch power supply electric energy meter |
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Cited By (1)
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| CN111665391A (en) * | 2019-03-08 | 2020-09-15 | 杭州海康威视数字技术股份有限公司 | Power class detection device |
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| CN109245289B (en) | 2023-12-22 |
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Effective date of registration: 20200923 Address after: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Applicant after: Guangzhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd. Address before: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Applicant before: GUANGZHOU POWER SUPPLY Co.,Ltd. |
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