CN207098941U - Self coupling type switching power supply - Google Patents
Self coupling type switching power supply Download PDFInfo
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- CN207098941U CN207098941U CN201720762235.3U CN201720762235U CN207098941U CN 207098941 U CN207098941 U CN 207098941U CN 201720762235 U CN201720762235 U CN 201720762235U CN 207098941 U CN207098941 U CN 207098941U
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- power supply
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- self coupling
- switching power
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Abstract
The utility model discloses a kind of self coupling type Switching Power Supply, including switching pulse control chip, change voltage inductance and rectification unit；The input access input voltage of switching pulse control chip, output end are in series with becoming voltage inductance；Become voltage inductance to be connected with rectification unit, the output end output conversion voltage of rectification unit.By the technical solution of the utility model, while the conversion that high efficiency, output stabilization are carried out to voltage is realized, cost is reduced, reduces the volume of self coupling type Switching Power Supply, so as to improve the scope of application of self coupling type Switching Power Supply.
Description
Technical field
It the utility model is related to transformation device technical field, more particularly to a kind of self coupling type Switching Power Supply.
Background technology
In the prior art, as shown in figure 1, Switching Power Supply needs to realize that the coupling of energy and decompression turn using transformer
Change, feedback circuit therein, which also needs to transformer, increases independent winding offer accessory power supply to power, and still, transformer is switching
Larger device space is occupied in power supply, and improves production cost.
Utility model content
At least one of regarding to the issue above, the utility model provides a kind of self coupling type Switching Power Supply, by by valency
It is cheap, the less inductance of size that the high frequency transformer that lattice are high, size is big, which changes, realize to voltage progress high efficiency,
While the conversion of stable output, cost is reduced, reduces the volume of Switching Power Supply.
To achieve the above object, the utility model provides a kind of self coupling type Switching Power Supply, including switching pulse control core
Piece, become voltage inductance and rectification unit；The input access input voltage of switching pulse control chip, output end is with becoming voltage inductance phase
Series connection；Become voltage inductance to be connected with rectification unit, the output end output conversion voltage of rectification unit.
In the above-mentioned technical solutions, it is preferable that above-mentioned self coupling type Switching Power Supply also includes feedback unit, feedback unit it is defeated
Enter end be connected with the output end of rectification unit, the output end of feedback unit with connect after switching pulse control chip and transformation
Inductance is in parallel.
In the above-mentioned technical solutions, it is preferable that rectification unit includes electric capacity and diode, after electric capacity and Diode series with
Become voltage inductance to be in parallel.
In the above-mentioned technical solutions, it is preferable that feedback unit includes optocoupler, voltage-regulator diode and resistance, voltage-regulator diode
And resistant series optocoupler and become voltage inductance output end between, emitter stage and the switching pulse control chip phase of optocoupler output
Even.
In the above-mentioned technical solutions, it is preferable that above-mentioned self coupling type Switching Power Supply also includes accessory power supply rectification unit, auxiliary
Power rectifier unit includes auxiliary capacitor, booster diode, auxiliary capacitor and booster diode be in series after with becoming voltage inductance simultaneously
Connection, the negative pole of booster diode are connected with the colelctor electrode of optocoupler output.
Compared with prior art, the beneficial effects of the utility model are：
1. being cheap, the less inductance of size by the way that the high frequency transformer that price is high, size is big is changed, realizing
While the conversion of high efficiency, output stabilization is carried out to voltage, cost is reduced, reduces the volume of self coupling type Switching Power Supply,
So as to improve the scope of application of self coupling type Switching Power Supply.
2. detecting the fluctuation situation of conversion voltage by feedback unit, and switching pulse control chip is passed to, to open
Guan pulse rushes control chip and adjusts switch on and off according to the fluctuation of conversion voltage, so as to control the time interval for becoming voltage inductance discharge and recharge
Or frequency, and then improve the Stability and veracity of conversion voltage.Simultaneously as partial feedback unit needs to provide auxiliary power supply
Power supply, therefore, the output end of feedback unit is connected with becoming voltage inductance, while providing accessory power supply for feedback unit, no
The power supply of main power source is influenceed, further improving needs to increase single winding on the transformer in the prior art to provide auxiliary
Power supply and the problem of the cost brought is higher, volume is larger.
3. rectification unit includes electric capacity and diode, the characteristic for exchange of being circulated using electric capacity blocking, and diode is just
Tropism and reverse property, the alternating current of the charge and discharge electric forming to transformation inductance interval carry out rectification, are converted to direct current output.
4. the input of the optocoupler in feedback unit is connected by resistance and voltage-regulator diode with the output end of rectification unit,
Photophore in optocoupler sends the light of respective strengths according to the voltage detected, and the light-receiving device in optocoupler is received after optical signal
Produce photoelectric current, realize " electrical-optical-electrical " transfer process, using light be medium to input, export electric signal carried out well every
From the electric insulation and antijamming capability of feedback circuit being improved, so that the feedback signal of feedback unit retains conversion voltage
Fluctuation situation, so as between time of the switching pulse control chip according to the fluctuation situation adjustment switch on and off of the conversion voltage of feedback
Every or frequency, improve conversion voltage Stability and veracity.
5. auxiliary capacitor and booster diode form rectification circuit, and are connected with the colelctor electrode of optocoupler output, for feedback
The circuit of unit provides the power supply of auxiliary, while does not influence the power supply of main power source, and improving needs becoming in the prior art
Increase single winding on depressor with the problem of cost for providing accessory power supply and bringing is higher, volume is larger.
Brief description of the drawings
Fig. 1 is a kind of circuit connection diagram of self coupling type Switching Power Supply disclosed in embodiment in the prior art；
Fig. 2 is the circuit connection signal block diagram of self coupling type Switching Power Supply disclosed in a kind of embodiment of the utility model；
Fig. 3 is the circuit connection diagram of self coupling type Switching Power Supply disclosed in a kind of embodiment of the utility model；
Fig. 4 is the charging principle schematic diagram for becoming voltage inductance in self coupling type Switching Power Supply disclosed in embodiment illustrated in fig. 3；
Fig. 5 is the discharge principle schematic diagram for becoming voltage inductance in self coupling type Switching Power Supply disclosed in embodiment illustrated in fig. 3.
In figure, the corresponding relation between each component and reference is：
10. self coupling type Switching Power Supply, 11. rectification units, 12. feedback units, 13. accessory power supply rectification units, U1. switches
Pulse Width Control chip, U2. optocouplers, T1. transformers, L1. become voltage inductance, C1. electric capacity, D1. diodes, C2. auxiliary capacitors, D2.
Booster diode, D5. voltage-regulator diodes, R1. resistance, V1. input voltages, V2. conversion voltages.
Embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Accompanying drawing in type embodiment, the technical scheme in the embodiment of the utility model is clearly and completely described, it is clear that is retouched
The embodiment stated is part of the embodiment of the present utility model, rather than whole embodiments.Based on the reality in the utility model
Apply example, the every other embodiment that those of ordinary skill in the art are obtained on the premise of creative work is not made, all
Belong to the scope of the utility model protection.
The utility model is described in further detail below in conjunction with the accompanying drawings：
As shown in Figures 2 and 3, according to a kind of self coupling type Switching Power Supply 10 provided by the utility model, including switching pulse
Control chip U1, become voltage inductance L1 and rectification unit 11；Switching pulse control chip U1 input access input voltage V1, it is defeated
Go out end and be in series with becoming voltage inductance L1；Become voltage inductance L1 to be connected with rectification unit 11, the output end output of rectification unit 11
Change voltage V2.
In this embodiment, by being by the transformer change for being used to carry out energy coupling and decompression conversion in the prior art
Become voltage inductance L1, realize the conversion to voltage by becoming voltage inductance L1 self coupling discharge and recharge, reduce cost, reduce self coupling
The volume of the device of type Switching Power Supply 10.
Specifically, switching pulse control chip U1 is used to the dc source of input being converted to pulse current, by transformation
After inductance L1 self coupling discharge and recharge decompression, it is direct current output by the filter rectification of rectification unit 11, realizes and change DC high voltage
For DC low-voltage.
In the above embodiment, it is preferable that above-mentioned self coupling type Switching Power Supply 10 also includes feedback unit 12, feedback unit 12
Input be connected with the output end of rectification unit 11, output end with connect after switching pulse control chip U1 and become piezoelectricity
Sense L1 is in parallel.
In this embodiment, the detection of feedback unit 12 conversion voltage V2 fluctuation situation, and pass to switching pulse control
Chip U1, so that switching pulse control chip U1 adjusts switch on and off according to conversion voltage V2 fluctuation, so as to control change piezoelectricity
Feel the time interval or frequency of L1 discharge and recharges, and then improve conversion voltage V2 Stability and veracity.Simultaneously as part is anti-
Feedback unit 12 needs to provide auxiliary electric power supply, therefore, the output end of feedback unit 12 is connected with becoming voltage inductance L1, is anti-
While the offer accessory power supply of unit 12 is provided, the power supply of main power source is not influenceed, further solving needs becoming in the prior art
Increase single winding on depressor with the problem of cost for providing accessory power supply and bringing is higher, volume is larger.
In the above embodiment, it is preferable that rectification unit 11 includes electric capacity C1 and diode D1, electric capacity C1 and diode D1
It is in parallel again with becoming voltage inductance L1 after series connection.
In this embodiment, rectification unit 11 includes electric capacity C1 and diode D1, circulates what is exchanged using electric capacity C1 blockings
Characteristic, and diode D1 positive tropism and reverse property, it is whole to becoming the alternating current progress of charge and discharge electric forming at voltage inductance L1 intervals
Stream, is converted to direct current output.
In the above embodiment, it is preferable that feedback unit 12 includes optocoupler U2, voltage-regulator diode D5 and resistance R1, resistance
R1 and voltage-regulator diode D5 is connected on optocoupler U2 and become between voltage inductance L1 output end, and the emitter stage of optocoupler U2 output ends is with opening
Guan pulse rushes control chip U1 and is connected.
In this embodiment, the input of the optocoupler U2 in feedback unit 12 by resistance R1 and voltage-regulator diode D5 with it is whole
The output end of stream unit 11 is connected, and the photophore in optocoupler U2 sends the light of respective strengths, optocoupler U2 according to the voltage detected
In light-receiving device receive photoelectric current produced after optical signal, realize the transfer process of " electrical-optical-electrical ", be medium to defeated using light
Enter, export electric signal and carried out good isolation, the electric insulation and antijamming capability of feedback circuit are improved, so that feedback
The feedback signal of member 12 retains conversion voltage V2 fluctuation situation, so that switching pulse control chip U1 is according to the conversion electricity of feedback
The time interval or frequency of V2 fluctuation situation adjustment switch on and off are pressed, improves conversion voltage V2 Stability and veracity.
In the above embodiment, it is preferable that above-mentioned self coupling type Switching Power Supply 10 also includes accessory power supply rectification unit 13, it is auxiliary
Power rectifier unit 13 is helped to include auxiliary capacitor C2, booster diode D2, after auxiliary capacitor C2 and booster diode D2 are in series
In parallel with becoming voltage inductance L1, booster diode D2 negative pole is connected with the colelctor electrode of optocoupler U2 output ends.
In this embodiment, auxiliary capacitor C2 and booster diode D2 form rectification circuit, and with optocoupler U2 output ends
Colelctor electrode is connected, and the power supply of auxiliary is provided for the circuit of feedback unit 12, while does not influence the power supply of main power source, improves
Need to increase on the transformer single winding in the prior art so that the cost for providing accessory power supply and bringing is higher, volume is larger
The problem of.
Wherein, the feedback unit 12 in above-mentioned self coupling type Switching Power Supply 10 can also use other not need accessory power supply
Circuit, the circuit of feedback unit 12 for not needing accessory power supply, accessory power supply finishing unit can equally be cancelled.
As shown in figure 4, become in above-described embodiment in voltage inductance L1 charging process, when switching pulse control chip U1 is exported
When state is turns on, input voltage V1 charges to inductance, electric capacity C1.The signified direction of dotted arrow is charging current in figure
Direction.
As shown in figure 5, become in above-described embodiment in voltage inductance L1 charging process, when switching pulse control chip U1 is exported
When state is turns off, the electric energy being stored in inductance discharges by two shunt circuits, and one is the filtered main electricity of electric capacity C1
Source conversion voltage V2, another is the accessory power supply formed by booster diode D2, auxiliary capacitor C2 rectifying and wave-filterings, to feedback
Optocoupler U2 power supplies in unit 12.By above-mentioned charging and discharging process, input voltage V1 is converted into conversion voltage V2.In figure
The signified direction of dotted arrow is the direction of discharge current.
Be worth it is especially set out, above-mentioned self coupling type Switching Power Supply 10 be adapted to input voltage with change voltage it is non-isolated should
Use occasion.
Be embodiment of the present utility model above, it is contemplated that in the prior art in Switching Power Supply transformer cost it is higher,
The larger technical problem of volume, the utility model proposes a kind of self coupling type Switching Power Supply, by by price is high, size is big height
It is cheap, the less inductance of size that frequency power transformer, which changes, is changed using pulse current through becoming the charge and discharge process of voltage inductance
Voltage, while the conversion that high efficiency, output stabilization are carried out to voltage is realized, cost is reduced, reduces self coupling type switch
The volume of power supply, so as to improve the scope of application of self coupling type Switching Power Supply.
Preferred embodiment of the present utility model is these are only, is not limited to the utility model, for this area
Technical staff for, the utility model can have various modifications and variations.It is all within the spirit and principles of the utility model,
Any modification, equivalent substitution and improvements made etc., should be included within the scope of protection of the utility model.
Claims (6)
- A kind of 1. self coupling type Switching Power Supply, it is characterised in that including：Switching pulse control chip, become voltage inductance and rectification unit；The input access input voltage of the switching pulse control chip, output end are in series with the change voltage inductance；The change voltage inductance is connected with the rectification unit, the output end output conversion voltage of the rectification unit.
- 2. self coupling type Switching Power Supply according to claim 1, it is characterised in that also including feedback unit, the feedback The input of member is connected with the output end of the rectification unit, the output end of the feedback unit respectively with the switching pulse Control chip is connected with the change voltage inductance.
- 3. self coupling type Switching Power Supply according to claim 1, it is characterised in that the rectification unit includes electric capacity and two poles Manage, be in parallel again with the change voltage inductance after the electric capacity and Diode series.
- 4. self coupling type Switching Power Supply according to claim 2, it is characterised in that the rectification unit includes electric capacity and two poles Manage, be in parallel again with the change voltage inductance after the electric capacity and Diode series.
- 5. the self coupling type Switching Power Supply according to claim 2 or 4, it is characterised in that the feedback unit includes optocoupler, steady Press diode and resistance, the voltage-regulator diode and the resistant series the optocoupler and the output end for becoming voltage inductance it Between, the emitter stage of the optocoupler output is connected with the switching pulse control chip.
- 6. self coupling type Switching Power Supply according to claim 5, it is characterised in that also including accessory power supply rectification unit, institute Stating accessory power supply rectification unit includes auxiliary capacitor, booster diode, and the auxiliary capacitor and the booster diode are in series It is connected afterwards with the transformation inductance in parallel, the negative pole of the booster diode with the colelctor electrode of the optocoupler output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720762235.3U CN207098941U (en) | 2017-06-28 | 2017-06-28 | Self coupling type switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720762235.3U CN207098941U (en) | 2017-06-28 | 2017-06-28 | Self coupling type switching power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207098941U true CN207098941U (en) | 2018-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720762235.3U Active CN207098941U (en) | 2017-06-28 | 2017-06-28 | Self coupling type switching power supply |
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| Country | Link |
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| CN (1) | CN207098941U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110425705A (en) * | 2019-08-27 | 2019-11-08 | 宁波奥克斯电气股份有限公司 | A kind of air-conditioning power consumption control system and air-conditioning |
-
2017
- 2017-06-28 CN CN201720762235.3U patent/CN207098941U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110425705A (en) * | 2019-08-27 | 2019-11-08 | 宁波奥克斯电气股份有限公司 | A kind of air-conditioning power consumption control system and air-conditioning |
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