CN107565824A - A kind of electrical energy conversion circuit suitable for wide input voltage - Google Patents
A kind of electrical energy conversion circuit suitable for wide input voltage Download PDFInfo
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- CN107565824A CN107565824A CN201710792534.6A CN201710792534A CN107565824A CN 107565824 A CN107565824 A CN 107565824A CN 201710792534 A CN201710792534 A CN 201710792534A CN 107565824 A CN107565824 A CN 107565824A
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Abstract
The invention discloses a kind of electrical energy conversion circuit suitable for wide input voltage, it is related to power circuit design field.The circuit being made up of L1, Q1, C2, S1 and D1, under different input Vin_1 voltage conditions, form different circuits, realization can rise to output voltage under low pressure input condition required voltage, avoid the electric current under lower pressure excessive, efficiency when the problem of conversion efficiency is too low, improving the conversion efficiency of change-over circuit, while not influenceing high input voltage.Solve the design bottleneck of power supply changeover device under wide input condition, enormously simplify design difficulty, the conversion efficiency under balanced high-low pressure input condition, the thermal losses of product in itself is reduced, so as to reduce the pollution of environment；Also solve in the prior art, using two-stage change-over circuit whole efficiency improve it is limited, and it is more complex and expensive the problem of.
Description
Technical field
The present invention relates to power circuit design field, more particularly to a kind of electric energy suitable for wide input voltage to change
Circuit.
Background technology
For AC/DC (exchange turns direct current) circuit, because line voltage is different between country variant or area, in order to simultaneous
The application in country variant or area is cared for, input voltage range needs design wider；Equally, for DC/DC, (direct current turns straight
Stream) circuit, it is also desirable to consider that the fluctuation range of input voltage in different application scenarios or a certain stationary applications occasion compares
Wide situation, therefore be also required to the wider of input voltage range design.That is, for AC/DC or DC/DC Switching Power Supply
Or converter circuit, generally existing design the phenomenon that input voltage is wider in circuit.
In the case of the input voltage of wide scope, when input voltage than it is relatively low when, flow through the electricity for being followed by each device in circuit
Stream can be more much larger than under the conditions of high input voltage, and larger electric current can cause circuit loss larger, so as to reduce power supply electricity
The conversion efficiency on road.So when designing power-switching circuit optimal design, typically to consider compromise below high-low pressure and set
Meter so that redundancy in design be present.
Conversion efficiency is low when at present, in order to solve the problems, such as low pressure input, generally use two-stage circuit, i.e., first uses one-level
Booster circuit, the input voltage of relative broad range is brought the voltage up by booster circuit, and the voltage after boosting is maintained
Steady state value is maintained compared with input voltage range narrower range；Then reality is converted voltages into by second level circuit again
Border required voltage, so for the circuit of the second level, its input voltage is the output voltage of first order circuit, the voltage
Relatively former input voltage is higher, and its scope is metastable or scope is relatively smaller, therefore its conversion efficiency is higher；But
It is that this circuit has two drawbacks：One is due to that whole energy have carried out energy conversion twice, and the whole efficiency of two-stage circuit carries
It is high limited；Second, relative to stage circuit, two-stage circuit is more complicated and cost is also higher.
The content of the invention
It is an object of the invention to provide a kind of electrical energy conversion circuit suitable for wide input voltage, so as to solve existing skill
Foregoing problems present in art.
To achieve these goals, the technical solution adopted by the present invention is as follows：
A kind of electrical energy conversion circuit suitable for wide input voltage, including：C1, L1, Q1, C2, S1 and D1, C1 both ends connect
Connect input voltage, Q1 both ends connection output voltage, C1 is in parallel with L1 after connect with Q1, C2, S1 parallel connection and after being connected with D1 and
L1 is in parallel；
When input voltage is low-voltage, S1 is normally opened, Q1, L1, C2 and D1 composition circuit for power conversion；
When input voltage is high voltage, Q1 is normally opened, S1 closures；
Wherein,
C1 and C2 is the energy-accumulating medium of electrolysis or other materials type；
L1 be inductance or other be in inductive material medium；
Q1 is mos field effect transistor or other device for power switching；
S1 is any switching device；
D1 is mos field effect transistor or other device for power switching.
The beneficial effects of the invention are as follows：A kind of electric energy suitable for wide input voltage provided in an embodiment of the present invention changes electricity
Road, the circuit being made up of L1, Q1, C2, S1 and D1, under different input Vin_1 voltage conditions, forms different circuits,
Realization can rise to output voltage under low pressure input condition required voltage, avoid the electric current under lower pressure excessive, turn
Efficiency when changing the problem of efficiency is too low, improve the conversion efficiency of change-over circuit, while not influenceing high input voltage.Solves width
The design bottleneck of power supply changeover device under input condition, enormously simplify design difficulty, turn under balanced high-low pressure input condition
Efficiency is changed, reduces the thermal losses of product in itself, so as to reduce the pollution of environment；Also solve in the prior art, using two
The problem of whole efficiency raising of level conversion circuit is limited, and more complex and expensive.
Brief description of the drawings
Fig. 1 applies to the electrical energy conversion circuit figure of wide input voltage；
Fig. 2 is circuit of reversed excitation figure in the prior art；
Fig. 3 is the circuit for power conversion used in the prior art.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with accompanying drawing, the present invention is entered
Row is further described.It should be appreciated that embodiment described herein is not used to only to explain the present invention
Limit the present invention.
As shown in figure 1, the embodiments of the invention provide a kind of electrical energy conversion circuit suitable for wide input voltage, including：
C1, L1, Q1, C2, S1 and D1, C1 both ends connection input voltage, Q1 both ends connection output voltage, C1 connected with Q1 after with L1
Parallel connection, C2, S1 are in parallel and in parallel with L1 after being connected with D1；
When input voltage is low-voltage, S1 is normally opened, Q1, L1, C2 and D1 composition circuit for power conversion；
When input voltage is high voltage, Q1 is normally opened, S1 closures；
Wherein,
C1 and C2 is the energy-accumulating medium of electrolysis or other materials type；
L1 be inductance or other be in inductive material medium；
Q1 is mos field effect transistor or other device for power switching；
S1 is any switching device；
D1 is mos field effect transistor or other device for power switching.
The electrical energy conversion circuit of said structure, its operation principle are：
In Vin_1 inputs under low pressure input condition, the electrical energy conversion circuit that the present embodiment provides is：S1 is normally opened, Q1,
L1, C2 and D1 form circuit for power conversion, and the raw V2 of electricity production pressure on C2, output voltage Vin_2 is equal to Vin_1+V2, so as to realize
Improve the purpose of input voltage.
In Vin_1 inputs under the conditions of high input voltage, the electrical energy conversion circuit that the present embodiment provides is：Q1 is normally opened, and S1 is closed
Close, then output voltage Vin_2 is equal to Vin_1.
It can be seen that in foregoing circuit, either under low pressure input condition, or under the conditions of high input voltage, output electricity
Pressure is all higher, then for being followed by circuit, its input voltage is all higher, so as to due under high input voltage, flowing through electricity
The electric current of each device will not be excessive in road, and therefore, its circuit loss also will not be excessive, solves in wide range input condition
Under, after change-over circuit, loss is larger, in circuit design, it is necessary to which the problem of considering of compromising, that is, solve wide input
Under the conditions of power supply changeover device design bottleneck, enormously simplify design difficulty, the conversion effect under balanced high-low pressure input condition
Rate, the thermal losses of product in itself is reduced, so as to reduce the pollution of environment；Also solve in the prior art, turned using two-stage
The problem of whole efficiency raising for changing circuit has, and more complex and expensive, change-over circuit provided by the invention,
Necessary voltage is boosted under low pressure input, when improving the conversion efficiency of change-over circuit, while not influenceing high input voltage
Efficiency.
Specific embodiment：
Traditional circuit of reversed excitation is as shown in circuit diagram 2, and following in low pressure input, the loss of circuit is very big, and the upper voltages of C1 are very
Small, surface current is very big under equal-wattage, causes power-efficient than relatively low, so common practices can increase stage circuit at present,
Such as circuit for power conversion among circuit diagram 3, C2 electric capacity is lifted to very high voltage, now flows through the electric current meeting of Q2 pipe
Reduce, the loss of circuit of reversed excitation can be reduced, but increased L1, Q1 and D1 are connected in series in circuit of reversed excitation, so cost can increase
Add, improved efficiency can also be influenceed by circuit for power conversion.
Take change-over circuit as shown in Figure 1 to control Vin_2 voltage in the present invention, pass through L1, Q1, C2, S1 and D1 group
Into circuit, under different input Vin_1 voltage conditions, carry out different action behaviors, form different circuits, realize
Output voltage can be risen to required voltage under low pressure input condition, avoid the electric current under lower pressure excessive, conversion efficiency
The problem of too low.
Specifically, in Vin_1 inputs under low pressure input condition, in circuit, keep S1 normally opened, then Q1, L1, C2 and D1
Circuit for power conversion is formed, V2 voltages can be produced on C2, now DC/DC input voltage vin _ 2 are equal to Vin_1+V2, realize
Improve the purpose of input voltage.And in the case where Vin_1 inputs condition of high voltage, in circuit, Q1 is maintained a normally open, and S1 is remained closed, this
When DC/DC input voltage vin _ 2 be equal to Vin_1.
In addition, as shown in Fig. 2 traditional circuit of reversed excitation (being made up of Q2, T1, D2 and C2) is in Vo band identical load situations
Under, Vin_1 in the case of low input, flow through T1 and Q2 electric current can than Vin_1 under the conditions of high input voltage it is big very
It is more, it so will consider tradeoff design below high-low pressure when designing power-switching circuit optimal design, exist in design
Redundancy.
And power-switching circuit provided by the invention is used, when connecing circuit after design, it is possible to which optimum point design is existed
Under the conditions of high input voltage, Reduced Design has been achieved in that, has improved the efficiency for being followed by circuit under wide input condition.
By using above-mentioned technical proposal disclosed by the invention, following beneficial effect has been obtained：The embodiment of the present invention carries
A kind of electrical energy conversion circuit suitable for wide input voltage supplied, the circuit being made up of L1, Q1, C2, S1 and D1, different
Input under Vin_1 voltage conditions, form different circuits, output voltage can be risen under low pressure input condition institute by realizing
Voltage is needed, avoids the problem of electric current under lower pressure is excessive, and conversion efficiency is too low, improves the conversion efficiency of change-over circuit,
Efficiency during high input voltage is not influenceed simultaneously.Solve the design bottleneck of power supply changeover device under wide input condition, enormously simplify
Design difficulty, the conversion efficiency under balanced high-low pressure input condition, reduces the thermal losses of product in itself, so as to reduce ring
The pollution in border；Also solve in the prior art, using two-stage change-over circuit whole efficiency improve it is limited, and more it is complicated simultaneously
And cost it is higher the problem of.
Each embodiment in this specification is described by the way of progressive, what each embodiment stressed be with
The difference of other embodiment, between each embodiment identical similar part mutually referring to.
Those skilled in the art should be understood that the sequential for the method and step that above-described embodiment provides can be entered according to actual conditions
Row accommodation, also can concurrently it be carried out according to actual conditions.
All or part of step in the method that above-described embodiment is related to can by program come instruct the hardware of correlation come
Complete, described program can be stored in the storage medium that computer equipment can be read, for performing the various embodiments described above side
All or part of step described in method.The computer equipment, such as：Personal computer, server, the network equipment, intelligent sliding
Dynamic terminal, intelligent home device, wearable intelligent equipment, vehicle intelligent equipment etc.；Described storage medium, such as：RAM、
ROM, magnetic disc, tape, CD, flash memory, USB flash disk, mobile hard disk, storage card, memory stick, webserver storage, network cloud storage
Deng.
Finally, it is to be noted that, herein, such as first and second or the like relational terms be used merely to by
One entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operation
Between any this actual relation or order be present.Moreover, term " comprising ", "comprising" or its any other variant meaning
Covering including for nonexcludability, so that process, method, commodity or equipment including a series of elements not only include that
A little key elements, but also the other element including being not expressly set out, or also include for this process, method, commodity or
The intrinsic key element of equipment.In the absence of more restrictions, the key element limited by sentence "including a ...", is not arranged
Except other identical element in the process including the key element, method, commodity or equipment being also present.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
Depending on protection scope of the present invention.
Claims (1)
- A kind of 1. electrical energy conversion circuit suitable for wide input voltage, it is characterised in that including：C1, L1, Q1, C2, S1 and D1, C1 both ends connection input voltage, Q1 both ends connection output voltage, C1 is in parallel with L1 after being connected with Q1, C2, S1 parallel connection and with It is in parallel with L1 after D1 series connection；When input voltage is low-voltage, S1 is normally opened, Q1, L1, C2 and D1 composition circuit for power conversion；When input voltage is high voltage, Q1 is normally opened, S1 closures；Wherein,C1 and C2 is the energy-accumulating medium of electrolysis or other materials type；L1 be inductance or other be in inductive material medium；Q1 is mos field effect transistor or other device for power switching；S1 is any switching device；D1 is mos field effect transistor or other device for power switching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710792534.6A CN107565824A (en) | 2017-09-05 | 2017-09-05 | A kind of electrical energy conversion circuit suitable for wide input voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710792534.6A CN107565824A (en) | 2017-09-05 | 2017-09-05 | A kind of electrical energy conversion circuit suitable for wide input voltage |
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| CN107565824A true CN107565824A (en) | 2018-01-09 |
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| CN201710792534.6A Pending CN107565824A (en) | 2017-09-05 | 2017-09-05 | A kind of electrical energy conversion circuit suitable for wide input voltage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022241625A1 (en) * | 2021-05-17 | 2022-11-24 | 华为技术有限公司 | Power supply circuit and terminal device |
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| US6538906B1 (en) * | 2002-02-11 | 2003-03-25 | Delta Electronics, Inc. | Energy storage circuit for DC-DC converter |
| US20040156217A1 (en) * | 2003-02-10 | 2004-08-12 | Phadke Vijay Gangadhar | Single conversion power converter with hold-up time |
| US20040164557A1 (en) * | 2003-02-21 | 2004-08-26 | Richard West | Monopolar dc to bipolar to ac converter |
| JP2007267581A (en) * | 2006-03-29 | 2007-10-11 | Tetsukichi Kuroda | Power-factor improved type dc stabilization switching power supply |
| EP1971019A2 (en) * | 2007-03-13 | 2008-09-17 | SMA Solar Technology AG | Switching device for transformerless conversion of an electric direct current into an AC voltage with two DC/DC converters and an DC/AC converter |
| CN106300982A (en) * | 2015-06-05 | 2017-01-04 | 台达电子工业股份有限公司 | There is the power supply device extending function of holding time |
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2017
- 2017-09-05 CN CN201710792534.6A patent/CN107565824A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6538906B1 (en) * | 2002-02-11 | 2003-03-25 | Delta Electronics, Inc. | Energy storage circuit for DC-DC converter |
| US20040156217A1 (en) * | 2003-02-10 | 2004-08-12 | Phadke Vijay Gangadhar | Single conversion power converter with hold-up time |
| US20040164557A1 (en) * | 2003-02-21 | 2004-08-26 | Richard West | Monopolar dc to bipolar to ac converter |
| JP2007267581A (en) * | 2006-03-29 | 2007-10-11 | Tetsukichi Kuroda | Power-factor improved type dc stabilization switching power supply |
| EP1971019A2 (en) * | 2007-03-13 | 2008-09-17 | SMA Solar Technology AG | Switching device for transformerless conversion of an electric direct current into an AC voltage with two DC/DC converters and an DC/AC converter |
| CN106300982A (en) * | 2015-06-05 | 2017-01-04 | 台达电子工业股份有限公司 | There is the power supply device extending function of holding time |
Non-Patent Citations (1)
| Title |
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| 陈丹江等: "一种超宽输入范围的开关电源的设计" * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022241625A1 (en) * | 2021-05-17 | 2022-11-24 | 华为技术有限公司 | Power supply circuit and terminal device |
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