CN208754199U - Non-isolated power supply circuit and its electric energy meter based on flyback chip - Google Patents
Non-isolated power supply circuit and its electric energy meter based on flyback chip Download PDFInfo
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- CN208754199U CN208754199U CN201821533336.4U CN201821533336U CN208754199U CN 208754199 U CN208754199 U CN 208754199U CN 201821533336 U CN201821533336 U CN 201821533336U CN 208754199 U CN208754199 U CN 208754199U
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- 238000004146 energy storage Methods 0.000 claims abstract description 20
- 238000006243 chemical reaction Methods 0.000 claims abstract description 19
- 230000001681 protective effect Effects 0.000 claims abstract description 14
- 238000001914 filtration Methods 0.000 claims abstract description 11
- 239000003990 capacitor Substances 0.000 claims description 36
- 238000003860 storage Methods 0.000 claims description 19
- 238000004804 winding Methods 0.000 claims description 19
- 230000005611 electricity Effects 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000005070 sampling Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a kind of non-isolated power supply circuits based on flyback chip, including input protective module, input filter module, rectification module, energy-storage module, output filter module and power conversion module；After protective module, externally input AC power source are inputted by input protective module protection; it is filtered by input filter module; direct current is converted to by rectification module again; pass through energy-storage module energy storage again; then by exporting final power supply electric energy after power conversion module conversion electric power signal, then after filtering by output filter module.The invention also discloses the electric energy meters for including the non-isolated power supply circuit based on flyback chip.The utility model realizes the electric energy conversion of power supply by flyback chip, greatly improves the reliability of non-isolated intelligent electric meter power supply device and the carrying load ability of output end, and this circuit is simple and reliable, low in cost and small volume.
Description
Technical field
The utility model is specifically related to a kind of non-isolated power supply circuit and its electric energy meter based on flyback chip.
Background technique
In recent years, with the development of economic technology and the improvement of people's living standards, intelligent electronic equipment is extensive
It enters in people's production and life, endless convenience is brought to people's production and life.And opposite electronic product
It is widely available, the reliability requirement of electronic product is also higher and higher.Meanwhile intelligent electric meter is final as energy-conserving intelligent power grid
The intelligent terminal of user, there has also been rapid development.
Currently, the electronic equipment including electric energy meter, common power circuit is roughly divided into two classes: isolated power supply
Circuit and non-isolated power circuit.
Circuit shown in FIG. 1 is existing common isolated power circuit, it can be seen from the figure that control chip is anti-
Swash topological project chip, which integrates metal-oxide-semiconductor, when being internally integrated metal-oxide-semiconductor conducting, transformer primary winding (2-1)
Energy is stored, outlet side does not have energy transmission at this time；When metal-oxide-semiconductor shutdown, the energy transmission of primary side winding (2-1) storage is to secondary
Grade side, secondary diode conducting export energy, and VCC winding (4-5) generates VCC voltage, VCC by coupling output winding (8-9)
Voltage is opening the machine stage by control chip interior constant current source power supply, by VCC winding power after foundation to be output, while VCC around
Group is stabilized the output voltage as voltage sample winding.Isolated power circuit, due to carrying out electrical isolation and energy using transformer
Amount transmitting, safety is preferable, but transmits energy due to using transformer, and the volume of transformer is larger, so that
The land occupation of such power circuit is larger, and circuit design relative difficulty.
Circuit shown in Fig. 2 is existing common non-isolated power circuit, it can be seen from the figure that input terminal accesses
Alternating voltage, the electric current of output end mainly determine that CX1 capacity is bigger, and capacitive reactance is smaller by the capacitive reactance of CX1, flow through filling for CX1
Discharge current is bigger, and the electric current of output end is less than this electric current, and remainder then flows into zener diode ZD1, if electric current is excessive,
It will cause ZD1 damage.Meanwhile the requirement of CX1 capacitor is also relatively high, generally selects high voltage CBB electric capacity.But such power supply
Circuit, output electric current is smaller while more demanding to the high-voltage capacitance performance of input terminal, and is easier to fail, reliably
Property is lower.
Utility model content
One of the purpose of this utility model is to provide a kind of high reliablity, small volume and low-cost based on flyback
The non-isolated power supply circuit of chip.
The two of the purpose of this utility model are to provide a kind of electric energy meter, which includes described based on flyback core
The non-isolated power supply circuit of piece.
This non-isolated power supply circuit based on flyback chip provided by the utility model, including input protective module, defeated
Enter filter module, rectification module, energy-storage module and output filter module, further includes power conversion module；Input protective module, defeated
Enter filter module, sorting module, energy-storage module, power conversion module and output filter module to be sequentially connected in series；Externally input friendship
Galvanic electricity source is by inputting after protective module protected, after being filtered by input filter module, then by rectification module rectification after
Direct current is converted to, then by energy-storage module energy storage, after then passing through power conversion module conversion electric power signal, then passes through output
After filter module is filtered, final power supply electric energy is exported.
Power conversion module is the power-switching circuit being made of the flyback chip of model SH50433.
The power-switching circuit include flyback chip, flyback chip power circuit, flyback chip output sample circuit,
Flyback chip output resistance, flyback chip outputting inductance, flyback chip power filter capacitor and flyback chip protection diode；Instead
6 feet~10 feet for swashing chip are directly connected to the output end of energy-storage module；5 feet of chip are sequentially connected flyback as output pin
One end of first winding of chip output resistance and flyback chip outputting inductance, the first winding of flyback chip outputting inductance it is another
One end connects output filter module；The cathode of the plus earth of flyback chip protection diode, flyback chip protection diode connects
It connects between flyback chip output resistance and flyback chip outputting inductance；One termination of the second winding of flyback chip outputting inductance
The other end on ground, the second winding of flyback chip outputting inductance exports two paths of signals, and first via signal is exported by flyback chip
4 feet of sample circuit connection flyback chip simultaneously provide out-put supply sampled signal, and second road signal passes through flyback chip power electricity
1 foot of road connection flyback chip simultaneously provides power supply signal；3 feet and 2 feet of flyback chip are directly grounded, 1 foot of flyback chip and 3
Flyback chip power filter capacitor is connected between foot.
The input protective module is X capacitor, and X capacitor is attempted by between the power supply line of input.
The input filter module is common mode filtering inductance.
The rectification module is full bridge rectifier.
The energy-storage module includes the first storage capacitor, the second storage capacitor and equalizing resistance；The output of rectification module
Anode connects the output negative pole of rectification module by the first storage capacitor of concatenation and the second storage capacitor, and equalizing resistance is connected in parallel on
First storage capacitor and the second storage capacitor both ends.
The output filter module is capacitor filter.
The utility model additionally provides a kind of electric energy meter, which includes described based on the non-isolated of flyback chip
Power circuit.
This non-isolated power supply circuit based on flyback chip provided by the utility model, realizes electricity by flyback chip
The electric energy in source is converted, and the reliability of non-isolated intelligent electric meter power supply device, the more traditional resistance of output end carrying load ability are greatly improved
It is bigger to hold decompression scheme, and this circuit is simple and reliable, low in cost and small volume.
Detailed description of the invention
Fig. 1 is the circuit diagram of existing isolated power circuit.
Fig. 2 is the circuit diagram of existing non-isolated power circuit.
Fig. 3 is the functional block diagram of the power circuit of the utility model.
Fig. 4 is the circuit theory schematic diagram of the power circuit of the utility model.
Specific embodiment
It is illustrated in figure 3 the functional block diagram of the power circuit of the utility model: provided by the utility model this to be based on
The non-isolated power supply circuit of flyback chip, including input protective module, input filter module, rectification module, energy-storage module and defeated
Filter module out further includes power conversion module；Input protective module, input filter module, sorting module, energy-storage module, electricity
Source conversion module and output filter module are sequentially connected in series；Externally input AC power source is protected by inputting protective module
Afterwards, after filtering by input filter module, then direct current is converted to after rectifying by rectification module, then stored up by energy-storage module
Can, then by after power conversion module conversion electric power signal, then after being filtered by output filter module, export final
Power supply electric energy.
It is illustrated in figure 4 the functional block diagram of the power circuit of the utility model: from the figure, it can be seen that input protection mould
Block is X capacitor CX1；Input filter module is common mode filtering inductance L1；Rectification module is rectifier bridge BD1；Energy-storage module includes the
One storage capacitor C1, the second storage capacitor C15, the first equalizing resistance (resistance R4 and R5) and the second equalizing resistance (resistance R6 and
R7)；The output cathode of rectification module connects the output of rectification module by the first storage capacitor of concatenation and the second storage capacitor
Cathode；First equalizing resistance is in parallel with the first storage capacitor, and the second equalizing resistance is in parallel with the second storage capacitor；Output filtering mould
Block includes capacitor C14, C16 and C17.
Power conversion module is the power-switching circuit being made of the flyback chip of model SH50433, is specifically included
Flyback chip U1, flyback chip power circuit (diode D11 and resistance R8), flyback chip export sample circuit (resistance sampling
Circuit R11 and R27), flyback chip output resistance R24, flyback chip outputting inductance L2, flyback chip power filter capacitor (C3
And C8) and flyback chip protection diode (D10)；6 feet of flyback chip~10 feet are directly connected to the output end of energy-storage module；
5 feet of chip are sequentially connected the one of the first winding of flyback chip output resistance and flyback chip outputting inductance as output pin
The other end at end, the first winding of flyback chip outputting inductance connects output filter module；The sun of flyback chip protection diode
Pole ground connection, the cathode of flyback chip protection diode are connected between flyback chip output resistance and flyback chip outputting inductance；
One end of second winding of flyback chip outputting inductance is grounded, the other end output two of the second winding of flyback chip outputting inductance
Road signal, first via signal export 4 feet of sample circuit connection flyback chip by flyback chip and provide out-put supply sampling
Signal, second road signal pass through 1 foot of flyback chip power circuit connection flyback chip and provide power supply signal；Flyback chip
3 feet and 2 feet are directly grounded, and are connected with flyback chip power filter capacitor between 1 foot and 3 feet of flyback chip.
The course of work of the power circuit of the utility model is as follows: the AC energy of input is protected by capacitor CX1, then
It is rectified into direct current after inductance L1 filtering, then through rectifier bridge BD1, direct current energy is then stored in capacitor C1 and C15
In, while also by 6 feet~10 feet of direct current energy input flyback chip U1；Flyback chip converts electrical energy into stable power supply
After signal, exported by 5 feet, then by after resistance R24 current limliting, after being filtered by inductance L2, then by capacitor C14, C16 and
C17 filtering, then exports stable power supply signal HVCC supplying power for outside；Meanwhile the electricity of the second winding sampling output of inductance L2
Source signal, and sampled signal is divided into two-way: all the way by powering after diode D11 and R8 current limliting to flyback chip, another way
After then being sampled by resistance R27 and R11,4 feet of output sampled signal feedback to flyback chip, to realize out-put supply signal
Closed-loop control.
This non-isolated power supply circuit based on flyback chip provided by the utility model can be used for other any required electricity
The electronic equipment of source circuit, including all types of measuring instruments (such as electric energy meter, water meter, gas meter, flow meter, calorimeter etc.), electric energy pipe
Manage terminal, distribution terminal, electric energy quality monitoring equipment, grid automation terminal, acquisition terminal, concentrator, data collector, meter
Measure instrument, write by hand device, fault detector etc..
Claims (9)
1. a kind of non-isolated power supply circuit based on flyback chip, including input protective module, input filter module, rectification mould
Block, energy-storage module and output filter module, it is characterised in that further include power conversion module；Input protective module, input filter
Module, sorting module, energy-storage module, power conversion module and output filter module are sequentially connected in series；Externally input AC power source
After being protected by input protective module, be converted to after being filtered by input filter module, then after being rectified by rectification module
Direct current, then by energy-storage module energy storage, after then passing through power conversion module conversion electric power signal, then pass through output filtering mould
After block is filtered, final power supply electric energy is exported.
2. the non-isolated power supply circuit according to claim 1 based on flyback chip, it is characterised in that power conversion module
For the power-switching circuit being made of the flyback chip of model SH50433.
3. the non-isolated power supply circuit according to claim 2 based on flyback chip, it is characterised in that the power supply turns
Change circuit include flyback chip, it is flyback chip power circuit, flyback chip output sample circuit, flyback chip output resistance, anti-
Swash chip outputting inductance, flyback chip power filter capacitor and flyback chip protection diode；6 feet of flyback chip ~ 10 feet are equal
It is directly connected to the output end of energy-storage module；5 feet of chip are sequentially connected flyback chip output resistance and flyback as output pin
One end of first winding of chip outputting inductance, the other end connection output filtering mould of the first winding of flyback chip outputting inductance
Block；The plus earth of flyback chip protection diode, the cathode of flyback chip protection diode are connected to flyback chip output electricity
Between resistance and flyback chip outputting inductance；One end of second winding of flyback chip outputting inductance is grounded, flyback chip output electricity
The other end of second winding of sense exports two paths of signals, and first via signal exports sample circuit by flyback chip and connects flyback core
4 feet of piece simultaneously provide out-put supply sampled signal, and second road signal passes through 1 foot of flyback chip power circuit connection flyback chip
And provide power supply signal；3 feet and 2 feet of flyback chip are directly grounded, and are connected with flyback core between 1 foot and 3 feet of flyback chip
Piece power filtering capacitor.
4. based on the non-isolated power supply circuit of flyback chip described according to claim 1 ~ one of 3, it is characterised in that described
Input protective module is X capacitor, and X capacitor is attempted by between the power supply line of input.
5. based on the non-isolated power supply circuit of flyback chip described according to claim 1 ~ one of 3, it is characterised in that described
Input filter module is common mode filtering inductance.
6. based on the non-isolated power supply circuit of flyback chip described according to claim 1 ~ one of 3, it is characterised in that described
Rectification module is full bridge rectifier.
7. based on the non-isolated power supply circuit of flyback chip described according to claim 1 ~ one of 3, it is characterised in that described
Energy-storage module includes the first storage capacitor, the second storage capacitor and equalizing resistance；The output cathode of rectification module passes through concatenation
The output negative pole of first storage capacitor and the second storage capacitor connection rectification module；Equalizing resistance be connected in parallel on the first storage capacitor and
Second storage capacitor both ends.
8. based on the non-isolated power supply circuit of flyback chip described according to claim 1 ~ one of 3, it is characterised in that described
Output filter module is capacitor filter.
9. a kind of electric energy meter, it is characterised in that including the non-isolated power supply based on flyback chip described in one of claim 1 ~ 8
Circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821533336.4U CN208754199U (en) | 2018-09-19 | 2018-09-19 | Non-isolated power supply circuit and its electric energy meter based on flyback chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821533336.4U CN208754199U (en) | 2018-09-19 | 2018-09-19 | Non-isolated power supply circuit and its electric energy meter based on flyback chip |
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| Publication Number | Publication Date |
|---|---|
| CN208754199U true CN208754199U (en) | 2019-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821533336.4U Active CN208754199U (en) | 2018-09-19 | 2018-09-19 | Non-isolated power supply circuit and its electric energy meter based on flyback chip |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109088555A (en) * | 2018-09-19 | 2018-12-25 | 湖南晟和电源科技有限公司 | Non-isolated power supply circuit, method of supplying power to and its electric energy meter based on flyback chip |
-
2018
- 2018-09-19 CN CN201821533336.4U patent/CN208754199U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109088555A (en) * | 2018-09-19 | 2018-12-25 | 湖南晟和电源科技有限公司 | Non-isolated power supply circuit, method of supplying power to and its electric energy meter based on flyback chip |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231107 Address after: Room 101, 3rd Floor, Building 11, Phase II of Weisheng Science and Technology Park, No. 468 Tongzipo West Road, High tech Development Zone, Changsha City, Hunan Province, 410205 Patentee after: Hunan Shenghe Intelligent Control Technology Co.,Ltd. Address before: 410205 no.1-8, 3rd floor, 101, No.11 plant, phase II project, Weisheng Science Park, no.468, tongzipo West Road, high tech Development Zone, Changsha City, Hunan Province Patentee before: HUNAN SEEHRE POWER TECHNOLOGY CO.,LTD. |