CN208479469U - Switching power circuit - Google Patents
Switching power circuit Download PDFInfo
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- CN208479469U CN208479469U CN201820987942.7U CN201820987942U CN208479469U CN 208479469 U CN208479469 U CN 208479469U CN 201820987942 U CN201820987942 U CN 201820987942U CN 208479469 U CN208479469 U CN 208479469U
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Abstract
The utility model discloses a kind of switching power circuit, energy supply control modules, for converting the electric energy of predeterminated frequency；Energy transmission module, the primary side of energy transmission module and the input terminal of energy supply control module connect, and the primary side of energy transmission module and the output end of energy supply control module connect.When energy supply control module is opened, primary side is cascaded with primary side, and primary side and primary side flow through electric current simultaneously, while filling energy.When energy supply control module is closed, the energy of primary side storage is transmitted to primary side by iron core, the electric energy that obtains when Switching Power Supply is opened of primary side is exported simultaneously to the output end of Switching Power Supply simultaneously, in output, the energy also exported due to primary side, it can largely improve output power.And primary side and primary side are cascaded by energy supply control module, and primary side and primary side can be made to have shared a reference potential, switching power circuit can be needed the circuit of primary and secondary altogether applied to silicon-controlled etc..
Description
Technical field
The utility model relates to power technique fields, and in particular to arrive a kind of switching power circuit.
Background technique
Switching Power Supply is the time ratio that control switch pipe turns on and off using modern power electronics technology, remains steady
Determine a kind of power supply of output voltage, with the development of power electronics technology and innovates, so that switch power technology is also constantly
Innovation.Switching Power Supply product be widely used in industrial automatic control, military industry equipment, research equipment, LED illumination, industrial control equipment,
Communication apparatus, power equipment, instrument and meter, Medical Devices, cooling and warming (refrigerator and air conditioner etc.), air purifier, liquid crystal display
The neck such as device, LED lamp, communication apparatus, audio-visual products, safety monitoring, LED light strip, computer housing, digital product and instrument class
Domain.
Wherein, inverse-excitation type switch power-supply is simple with its circuit structure, low in cost and well received, and existing inverse-excitation type is opened
Powered-down source generally includes isolation type switch power and non-isolation type Switching Power Supply, however, in the technical solution of isolating switch power
In, due to the presence of transformer, primary and secondary side isolation, the circuit may not apply to silicon-controlled etc. need the electricity of primary and secondary altogether
Lu Zhong.It is limited to I-shaped inductance in Unisolated switch power circuit, biggish power cannot be provided, it is difficult to adapt to relatively broad
Using.
Utility model content
The technical problem to be solved by the present invention is to how improve the output power of switching power circuit.
For this purpose, the example of the utility model provides a kind of switching power circuit, comprising: energy supply control module, for converting
The electric energy of predeterminated frequency；Energy transmission module, the primary side of the energy transmission module and the input of the energy supply control module
End connection, the primary side of the energy transmission module are connect with the output end of the energy supply control module.
Optionally, the energy supply control module includes switching tube, the input terminal of the switching tube and the energy transmission mould
The primary side of block connects, and the output end of the switching tube is connect with the primary side of the energy transmission module.
Optionally, the energy transmission module includes high frequency transformer；One end of the primary coil of the high frequency transformer
For being connected to power supply, the other end of the primary coil is connected to the energy supply control module input terminal, the transformer
One end of secondary coil is connect with the output end of the energy supply control module, and and the other end collectively as switching power circuit
Output end.
Optionally, switching power circuit further include: rectification filtering module, for being arranged in the energy transmission module and electricity
Between source, rectifying and wave-filtering is carried out to the power supply.
Optionally, switching power circuit further include: absorption module is arranged in the rectification filtering module and the power supply control
Between molding block, and the energy transmission wired in parallel, for energy extra in circuit.
Optionally, switching power circuit further include: surge suppression modules, for being arranged in the rectification filtering module and institute
It states between power supply, for inhibiting surge current and/or surge voltage.
Optionally, switching power circuit further include: output end and the institute of the switching power circuit is arranged in feedback module
It states between the control terminal of energy supply control module.
Optionally, the feedback module includes: current feedback module or voltage feedback module.
Optionally, switching power circuit further include: the output end of switching power circuit is arranged in output filter module.
Switching power circuit provided by the embodiment of the utility model, energy supply control module, for converting the electricity of predeterminated frequency
Energy；The primary side of energy transmission module, the energy transmission module is connect with the input terminal of the energy supply control module, the energy
The primary side of amount transfer module is connect with the output end of the energy supply control module.When energy supply control module is opened, primary side
It is cascaded with primary side, primary side and primary side flow through electric current simultaneously, and primary side and primary side fill energy simultaneously.In power supply control
When molding block is closed, the energy of primary side storage is transmitted to primary side by iron core, while primary side is when Switching Power Supply is opened
The electric energy of acquisition is exported simultaneously to the output end of Switching Power Supply, in output, the energy that is also exported due to primary side, it can compared with
The raising output power of big degree.And primary side and primary side are cascaded by energy supply control module, can be made just
Grade side and primary side have shared a reference potential, switching power circuit can be needed primary and secondary altogether applied to silicon-controlled etc.
Circuit.
In optionally technical solution provided in this embodiment, energy transmission module is transformer, replaces work using transformer
Font inductance can not only provide higher power, and be adapted to high-frequency circuit and prevent noise.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
Fig. 1 shows the modular diagram of the switching power circuit of the present embodiment；
Fig. 2 shows the schematic diagrames of the power circuit that opens the light of the present embodiment；
The current flow diagram when energy supply control module that Fig. 3 shows the present embodiment is opened；
Current flow diagram when Fig. 4 shows the energy supply control module shutdown of the present embodiment.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally
Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical
Novel protected range.
The utility model embodiment provides a kind of switching power circuit, and as depicted in figs. 1 and 2, including power supply controls mould
Block 10, for converting the electric energy of predeterminated frequency；Energy transmission module 20, the primary side of the energy transmission module 20 and the electricity
The input terminal of source control module connects, the output end of the primary side of the energy transmission module 20 and the energy supply control module 10
Connection.In the present embodiment, energy supply control module 10 is usually made of pulse width modulation (PWM) control chip and switching tube,
It can use power electronic technique, the time ratio that control switch pipe turns on and off maintains to stabilize the output voltage.
In the present embodiment, it is possible to the one end for measuring the primary side of transfer module 20 is connect with energy supply control module 10, primary side
The other end connect with the output end of the switching power circuit.The output end of switching power circuit exports positive voltage.In this reality
It applies in example, it can be transformer, since I-shaped inductive is difficult to provide that alleged energy transmission module 20, which can be I-shaped inductive,
Biggish power, and it is easy to produce in high-frequency circuit the high frequency noise that ear can be heard, environment is polluted, therefore, in this implementation
In example, it can preferentially select transformer as energy transmission module 20, specifically, if necessary to high-frequency circuit, in the present embodiment
In high frequency transformer can be selected as energy transmission module 20.Higher power can be not only provided using high frequency transformer,
And it is adapted to high-frequency circuit and prevents noise.In the particular embodiment, the primary side of energy transmission module 20 and time
Grade side can be used as energy storage inductor, i.e. the primary side of energy transfer module 20 and primary side is connected by energy supply control module 20
Together.
With Fig. 3 and electric current shown in Fig. 4 in switching power circuit flow schematic diagram to the Switching Power Supply in the present embodiment
Principle be illustrated, be illustrated by taking transformer as an example in the present embodiment, it is possible to measure transfer module 20, as shown in figure 3, in electricity
When source control module 10 is opened, primary coil is cascaded with secondary coil, and primary coil and secondary coil flow through electricity simultaneously
Stream, primary coil and secondary coil fill energy simultaneously.As shown in figure 4, when energy supply control module 10 is closed, primary coil storage
Energy is transmitted to secondary coil by transformer core, while the electric energy that secondary coil is obtained when Switching Power Supply is opened is defeated simultaneously
Out to the output end of Switching Power Supply, in output, the energy that is also exported due to primary coil, it can largely improve defeated
Power out.One end of the primary side of energy transmission module 20 is connect with energy supply control module 10, the other end and switch of primary side
The output end of power circuit connects, and water conservancy diversion device 80 is provided between one end and ground of primary side, the water conservancy diversion device 80 is just
Pole ground connection, the cathode of the water conservancy diversion device 80 are connect with one end of the primary side.The output end output of switching power circuit is just
Voltage.In the present embodiment, water conservancy diversion device can be diode.Also, the primary coil of transformer and secondary coil pass through electricity
Source control module is cascaded, and primary and secondary can be made to have shared a reference potential, can opening the present embodiment
Powered-down source circuit needs the circuit of primary and secondary altogether applied to silicon-controlled etc..
In the present embodiment, the switching tube of energy supply control module 10 may include that Metal-Oxide Semiconductor field-effect is brilliant
Body pipe (Metal-Oxide-Semiconductor Field-Effect Transistor, MOSFET), specifically drain conduct
The input terminal of field-effect tube, output end of the source electrode as field-effect tube, the control terminal in grid as field-effect tube.In this implementation
In example, the drain electrode of field-effect tube is connect with the primary side for stating energy transmission module 20, and the source electrode of field-effect tube and the energy pass
Pass the primary side connection of module 20.
In an alternate embodiment of the invention, it as shown in Figure 1, switching power circuit can also include rectification filtering module 30, is used for
It is arranged between the energy transmission module and power supply, rectifying and wave-filtering is carried out to the power supply.In the present embodiment, such as Fig. 2 institute
Show, current rectifying and wave filtering circuit may include first capacitor C1, be arranged in parallel between power positive cathode, common mode inductance L1, and rectification
The second capacitor C7, the second capacitor C2 can be set for rectifier bridge BD1 output signal in the output end of rectifier bridge BD1 in bridge BD1
It is filtered, first capacitor C1 can use safety capacitor, to increase safety coefficient.
In optionally embodiment, switching power circuit as shown in Figure 1 can also include absorption module 40, be arranged described
It is in parallel with the energy transmission module 20 between rectification filtering module 30 and the energy supply control module 10, for more in circuit
Remaining energy.In the present embodiment, as shown in Fig. 2, absorption module 40 can use RCD absorbing circuit, specifically, first resistor
(3rd resistor R3's group 41 connects with the 4th resistance R4, and the 5th resistance R5 connects with the 6th resistance R6, then composes in parallel the first electricity
Resistance group 41) it connects with after the C3 parallel connection of third capacitor with first diode D1, form RCD absorbing circuit, one end and the rectification
The output end of bridge connects, and the input terminal of the other end and energy supply control module connects, the primary coil of RCD absorbing circuit and transformer
Parallel connection, absorption module 40 can eliminate the excess energy stored by the spuious and transformation leakage inductance in circuit, prevent field-effect tube two
Hold overtension.
In optionally embodiment, as shown in Figure 1, switching power circuit can also include surge suppression modules 50, specifically
, it is arranged between the rectification filtering module 30 and the power supply, for inhibiting surge current and/or surge voltage.Upper
Electric moment inhibits surge voltage, in the present embodiment, as shown in Fig. 2, varistor RV1 can be used, over-voltage guarantor may be implemented
Shield, lightning stroke, surge current/voltage absorbing peak pulse, limitation power supply amplitude, protective switch power circuit, in the present embodiment,
To prevent electric current excessive, component in load or circuit is caused to burn, surge suppression modules 50 can also include that current protection fills
It sets, specifically may refer to the protective tube F1 in Fig. 2.
In an alternate embodiment of the invention, as shown in Figure 1, switching power circuit can also include feedback module, it is arranged described
Between the output end of switching power circuit and the control terminal of the energy supply control module, in the present embodiment, feedback module includes:
Current feedback module or voltage feedback module, by taking Voltage Feedback as an example, as shown in Fig. 2, proportion resistor, institute in Fig. 2 can be used
The 7th resistance R7 shown and the 8th resistance R8, by the resistance value of adjusting resistance to determine output voltage, the regulative mode of resistance can
It is determined with the difference of the chip used according to energy supply control module.
In the present embodiment, as shown in Figure 1, the output end in switching power circuit can also include output filter module
70, it can be connected in parallel between output end by capacitor, the electric energy of output is filtered.Water conservancy diversion device in one end of secondary coil
80, it can prevent the electric energy of secondary coil from increasing suddenly, caused electricity Current Voltage mutation.In the present embodiment, water conservancy diversion device
80 can use freewheeling diode, can specifically use Quick-return diode or Schottky diode.
In conjunction with Fig. 1, the structure of switching circuit is specifically described, switching power circuit includes surge suppression modules,
The output end of surge suppression modules is connect with rectification filtering module, the first end and rectification filtering module of the primary coil of transformer
Output end one end connection, the input terminal of the second end of primary coil and energy supply control module connects, and absorption module parallel connection connects
It connects between primary coil and the input terminal of energy supply control module, the output end of energy supply control module and one end of secondary coil connect
It connects, and and output end of the other end collectively as switching power circuit as switching power circuit.According to above-mentioned connection relationship, ask
With reference to Fig. 3 and Fig. 4, the electric signal streams of Switching Power Supply are specifically described to specifically, as shown in figure 3, open-minded in energy supply control module
When, the electric signal of one end output end output of rectification filtering module, by primary coil, primary coil stores electric energy, electric signal
Reach the input terminal of energy supply control module, electric signal is exported by energy supply control module from output end, flows through secondary coil, secondary
Coil stores electric energy, the other end of rectification filtering module is back to, at this point, electric signal is without overload.As shown in figure 4, in electricity
When source control module is closed, the energy of primary coil storage is transferred to secondary coil, and and secondary coil by magnetic core of transformer
The energy of storage reaches load simultaneously, and reaches the other end of secondary coil by water conservancy diversion device.Since primary coil also exports
Energy, can largely improve output power.
Although being described in conjunction with the accompanying the embodiments of the present invention, those skilled in the art can not departed from
Various modifications and variations can be made in the case where the spirit and scope of the utility model, and such modifications and variations are each fallen within by appended
Within claim limited range.
Claims (9)
1. a kind of switching power circuit characterized by comprising
Energy supply control module, for converting the electric energy of predeterminated frequency；
The primary side of energy transmission module, the energy transmission module is connect with the input terminal of the energy supply control module, described
The primary side of energy transmission module is connect with the output end of the energy supply control module.
2. switching power circuit as described in claim 1, which is characterized in that the energy supply control module includes switching tube, institute
The input terminal for stating switching tube is connect with the primary side of the energy transmission module, and the output end of the switching tube and the energy pass
Pass the primary side connection of module.
3. switching power circuit as described in claim 1, which is characterized in that the energy transmission module includes high frequency transformation
Device；
For being connected to power supply, the other end of the primary coil is connected to institute for one end of the primary coil of the high frequency transformer
State energy supply control module input terminal, the output end company of one end of the secondary coil of the transformer and the energy supply control module
Connect, and and the other end collectively as switching power circuit output end.
4. switching power circuit as claimed in any one of claims 1-3, which is characterized in that further include: rectification filtering module,
For being arranged between the energy transmission module and power supply, rectifying and wave-filtering is carried out to the power supply.
5. switching power circuit as claimed in claim 4, which is characterized in that further include: absorption module is arranged in the rectification
Between filter module and the energy supply control module, and the energy transmission wired in parallel, for energy extra in absorbing circuit
Amount.
6. switching power circuit as claimed in claim 4, which is characterized in that further include: surge suppression modules, for being arranged
Between the rectification filtering module and the power supply, for inhibiting surge current and/or surge voltage.
7. switching power circuit as claimed in any one of claims 1-3, which is characterized in that further include: feedback module, setting
Between the output end of the switching power circuit and the control terminal of the energy supply control module.
8. switching power circuit as claimed in claim 7, which is characterized in that the feedback module includes: current feedback module
Or voltage feedback module.
9. switching power circuit as claimed in any one of claims 1-3, which is characterized in that further include: output filter module,
The output end of switching power circuit is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820987942.7U CN208479469U (en) | 2018-06-25 | 2018-06-25 | Switching power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820987942.7U CN208479469U (en) | 2018-06-25 | 2018-06-25 | Switching power circuit |
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| Publication Number | Publication Date |
|---|---|
| CN208479469U true CN208479469U (en) | 2019-02-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820987942.7U Active CN208479469U (en) | 2018-06-25 | 2018-06-25 | Switching power circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108599562A (en) * | 2018-06-25 | 2018-09-28 | 珠海格力电器股份有限公司 | Switching power circuit |
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2018
- 2018-06-25 CN CN201820987942.7U patent/CN208479469U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108599562A (en) * | 2018-06-25 | 2018-09-28 | 珠海格力电器股份有限公司 | Switching power circuit |
| CN108599562B (en) * | 2018-06-25 | 2020-10-16 | 珠海格力电器股份有限公司 | Switching power supply circuit |
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