CN206686081U - A kind of multi-stage switching power supply system and Buck Boosts - Google Patents
A kind of multi-stage switching power supply system and Buck Boosts Download PDFInfo
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- CN206686081U CN206686081U CN201720067110.9U CN201720067110U CN206686081U CN 206686081 U CN206686081 U CN 206686081U CN 201720067110 U CN201720067110 U CN 201720067110U CN 206686081 U CN206686081 U CN 206686081U
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Abstract
A kind of multi-stage switching power supply system and Buck Boosts are the utility model is related to, the Buck Boosts include the first inductance, first switch pipe, second switch pipe, first diode and the second diode, and, the first end of the anode connection first switch pipe of input voltage, the anode of output voltage connects the negative pole of the second diode, the negative terminal of input voltage connects the positive pole of the first diode respectively, second end of second switch pipe and the negative terminal of output voltage, the first end of first inductance connects the second end of first switch pipe and the negative pole of the first diode respectively, second end of the first inductance connects the positive pole of the second diode and the first end of second switch pipe respectively, also include：First relay in parallel with first switch pipe；And the second relay with the second diodes in parallel.Implement the technical solution of the utility model, improve the conversion efficiency of voltage, and used device is less, cost is low and circuit structure is simple.
Description
Technical field
It the utility model is related to field of switch power, more particularly to a kind of multi-stage switching power supply system and Buck-Boost
Converter.
Background technology
With the development of science and technology, requirement of the Switching Power Supply to efficiency further improves, puies forward efficient scheme and be roughly divided into
It is following two：1. using lower device is lost, for example, magnetic core of the metal-oxide-semiconductor of low on-resistance, low damage etc.；2. opened using soft
Pass technology, for example, shifting to the harmonic technologies such as full-bridge, LLC.But the introducing of scheme 1 cause cost increase it is larger；Scheme 2 is drawn
Enter to cause cost increase, transformer configuration complicated, the unfavorable factors such as reliability reduces.
Utility model content
The technical problems to be solved in the utility model is, big, baroque scarce for the above-mentioned cost of prior art
Fall into, there is provided a kind of multi-stage switching power supply system and One Buck-Boost converter body.
Technical scheme is used by the utility model solves its technical problem：A kind of Buck-Boost converters are constructed,
Including the first inductance, first switch pipe, second switch pipe, the first diode and the second diode, moreover, the Buck-Boost
The anode of the input voltage of converter connects the first end of the first switch pipe, the output electricity of the One Buck-Boost converter body
The anode of pressure connects the negative pole of second diode, and the negative terminal of the input voltage of the One Buck-Boost converter body connects respectively
The output voltage of the positive pole of first diode, the second end of the second switch pipe and the One Buck-Boost converter body
Negative terminal, the first end of first inductance connect the second end of the first switch pipe and bearing for first diode respectively
Pole, the second end of first inductance connect the positive pole of second diode and the first end of the second switch pipe respectively,
The One Buck-Boost converter body also includes：
It is in parallel with the first switch pipe, and be used in the case where the first switch pipe is straight-through to the first switch
The first relay that pipe is bypassed；And
With second diodes in parallel, and in the case where second diode is straight-through to the two or two pole
The second relay that pipe is bypassed.
Preferably, first relay and second relay act under no-voltage operating mode respectively.
Preferably, in addition to the first electric capacity and the second electric capacity, moreover, first capacitance connection is in the Buck-
Between the anode and negative terminal of the input voltage of Boost；Second capacitance connection is in the One Buck-Boost converter body
Output voltage anode and negative terminal between.
The utility model also constructs a kind of multi-stage switching power supply system, including DC/DC converters, in addition to for bypassing institute
State the 3rd relay of DC/DC converters.
Preferably, the DC/DC converters are the One Buck-Boost converter body described in any of the above item.
Preferably, the 3rd relay is connected to the anode of the input voltage of the One Buck-Boost converter body and described
Between the anode of the output voltage of One Buck-Boost converter body；Or
3rd relay is connected to the anode of the input voltage of the One Buck-Boost converter body and first electricity
Between second end of sense.
Preferably, the DC/DC converters are Buck converters, and the Buck converters include the 3rd switching tube, the 3rd
Diode and the second inductance, the first end of the 3rd switching tube connect the anode of the input voltage of the Buck converters, institute
The second end for stating the 3rd switching tube connects the first end of second inductance, and the second end of second inductance connects the Buck
The anode of the output voltage of converter, the negative pole of the 3rd diode connect the second end of the 3rd switching tube, and described the
The positive pole of three diodes connects the negative terminal of the input voltage of the Buck converters and the output electricity of the Buck converters respectively
The negative terminal of pressure.
Preferably, the 3rd relay is connected to the anode of the input voltage of the Buck converters and the Buck becomes
Between the anode of the output voltage of parallel operation；Or
3rd relay is connected between first end and its second end of the 3rd switching tube.
Preferably, the DC/DC converters are Boost, and the Boost includes the 4th switching tube, the
Four diodes and the 3rd inductance, the first end of the 3rd inductance connect the anode of the input voltage of the Boost, institute
The second end for stating the 3rd inductance connects the positive pole of the 4th diode, and the negative pole of the 4th diode connects the Boost
The anode of the output voltage of converter, the first end of the 4th switching tube connect the second end of the 3rd inductance, and described the
Second end of four switching tubes connect respectively the input voltage of the Boost negative terminal and the Boost it is defeated
Go out the negative terminal of voltage.
Preferably, the 3rd relay is connected to the anode of the input voltage of the Boost and the Boost
Between the anode of the output voltage of converter；Or
3rd relay is connected between the positive pole and its negative pole of the 4th diode.
Implement the technical solution of the utility model, in One Buck-Boost converter body, for there is the semiconductor of straight-through demand
Device (such as switching tube or diode), in its both ends corresponding relay in parallel., can adhesive when needing straight-through semiconductor devices
Corresponding relay, because the impedance at its both ends after relay adhesive diminishes, therefore improve the effect of the One Buck-Boost converter body
Rate, moreover, used device is less, cost is low and circuit structure is simple.
In multi-stage switching power supply, for there is the DC/DC converters of straight-through demand, in its both ends corresponding relay in parallel
Device.When DC/DC converters require input voltage it is equal with output voltage when, can the corresponding relay of adhesive, now, the DC/DC change
Parallel operation is bypassed, noenergy loss, therefore improves the operating efficiency of the multi-stage switching power supply system.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.In accompanying drawing：
Fig. 1 is the circuit diagram of the utility model One Buck-Boost converter body embodiment one；
Fig. 2 is control sequential figure of the One Buck-Boost converter body under Buck patterns in Fig. 1；
Fig. 3 is control sequential figure of the One Buck-Boost converter body under Boost patterns in Fig. 1；
Fig. 4 is the structural representation of the utility model multi-stage switching power supply system embodiment one；
Fig. 5 is the circuit diagram of the utility model multi-stage switching power supply system embodiment two；
Fig. 6 is the control sequential figure of multi-stage switching power supply system in bypass mode in Fig. 5；
Fig. 7 is the circuit diagram of the utility model multi-stage switching power supply system embodiment three；
Fig. 8 is the circuit diagram of the utility model multi-stage switching power supply system embodiment four；
Fig. 9 is the circuit diagram of the utility model multi-stage switching power supply system embodiment five；
Figure 10 is the circuit diagram of the utility model multi-stage switching power supply system embodiment six.
Embodiment
Fig. 1 is the circuit diagram of the utility model One Buck-Boost converter body embodiment one, and One Buck-Boost converter body is used for
Buck or boost conversion is carried out to input voltage vin, the voltage after changing is output voltage Vo.The Buck-Boost of the embodiment
Converter is input and output One Buck-Boost converter body in the same direction, and is included：First inductance L1, first switch pipe Q1, second
Switching tube Q2, the first diode D1, the second diode D2, the first relay K1, the second relay K2, the first electric capacity C1 and second
Electric capacity C2.Moreover, the anode Vin+ connection first switch pipes Q1 of input voltage first end, the anode Vo+ connections of output voltage
Second diode D2 negative pole, the negative terminal Vin- of input voltage connect the first diode D1 positive pole, second switch pipe Q2 respectively
The second end and output voltage negative terminal Vo-, the first inductance L1 first end connect respectively first switch pipe Q1 the second end and
First diode D1 negative pole, the first inductance L1 the second end connect the second diode D2 positive pole and second switch pipe Q2 respectively
First end.First relay K1 is in parallel with first switch pipe Q1, and in the case where first switch pipe Q1 is straight-through to the
One switching tube Q1 is bypassed, and the second relay K2 is in parallel with the second diode D2, and is used for what is led directly in the second diode D2
In the case of the second diode is bypassed.First electric capacity C1 is connected between the anode Vin+ of input voltage and negative terminal Vin-,
Second electric capacity C2 is connected between the anode Vo+ of output voltage and negative terminal Vo-, and the first electric capacity C1 and the second electric capacity C2 rise respectively
Pressure stabilization function.It should be noted that, first switch pipe Q1 and second switch pipe Q2 in the embodiment select metal-oxide-semiconductor in addition, when
So, in other embodiments, the controllable semiconductor devices such as IGBT also can be selected.
When the One Buck-Boost converter body is operated in Buck patterns, with reference to Fig. 2, second switch pipe Q2 and the first relay
Device K1 disconnects, and first switch pipe Q1 realizes PWM, and the first diode D1 realizes afterflow, and diode D2 has straight-through demand, now
Diode D2 is bypassed using the second relay K2.When control sequential as shown in Figure 2 is to the One Buck-Boost converter body
When being controlled, when first switch pipe Q1 is turned on, electric current passes through first switch pipe Q1, first from the anode Vin+ of input voltage
Inductance L1, the second relay K2, rear class equivalent load (being connected with output voltage Vo) flow to the negative terminal Vin- of input voltage, its
In, Vin- and Vo- can be the holding altogether of converter；When first switch pipe Q1 is turned off, electric current on the first inductance L1 from its
Second end flows to the first inductance L1 first end by the second relay K2, rear class equivalent load and the first diode D1.
When the One Buck-Boost converter body is operated in Boost patterns, with reference to Fig. 3, the first diode D1 and the second relay
Device K2 disconnects, and second switch pipe Q2 realizes PWM, and the second diode D2 realizes afterflow, and first switch pipe Q1 has straight-through demand,
Now first switch pipe Q1 is bypassed using the first relay K1.When control sequential as shown in Figure 3 is to the Buck-
When Boost is controlled, when second switch pipe Q2 is turned on, electric current from the anode Vin+ of input voltage by first after
Electrical equipment K1, the first inductance L1, second switch pipe Q2 flow to the negative terminal Vin- of input voltage；When second switch pipe Q2 is turned off, electricity
Stream passes through the first relay K1, the first inductance L1, the second diode D2, rear class equivalent negative current-carrying from the anode Vin+ of input voltage
To the negative terminal Vin- of input voltage.
Implement the technical scheme of the embodiment, for there is the semiconductor devices of straight-through demand (first switch pipe Q1 and second
Diode D2), in its both ends corresponding relay in parallel, the conducting that semiconductor devices is less than due to the conduction impedance of relay is hindered
It is anti-, so, when needing conducting semiconductor device, can the corresponding relay of adhesive, due to the impedance at its both ends after relay adhesive
Diminish, therefore improve the efficiency of the One Buck-Boost converter body.Furthermore, it is necessary to explanation, the resistance of relay adhesive back contact
Anti- lower, transducer effciency is higher.
Due to relay division in the case of high voltage or high current, it is possible to contact adhesion occurs, therefore, at one
In preferred embodiment, the first relay K1, the second relay K2 are acted under no-voltage operating mode respectively, i.e. the first relay K1,
After the semiconductor devices that second relay K2 is bypassed respectively is led directly to, in the case that corresponding relay contact both end voltage is approximately 0,
The corresponding relay of adhesive, it can so ensure the reliability of relay, so as to improve the service life of relay.As shown in Fig. 2
During adhesive the second relay K2, it is ensured that first switch pipe Q1 is first opened, because：After first switch pipe Q1 is opened, second after
The voltage difference at electrical equipment K2 both ends is almost nil (the second diode D2 voltage can be neglected), now the relay of adhesive second again
K2.Similarly, when turning off the second relay K2, it is ensured that first switch pipe Q1 is later than the second relay K2 shut-offs.Such as Fig. 3 institutes
Show, in adhesive the first relay K1, it is ensured that first open first switch pipe Q1；When turning off the first relay K1, it is ensured that
First switch pipe Q1 is later than the first relay K1 shut-offs.
Fig. 4 is the structural representation of the utility model multi-stage switching power supply system embodiment one, and the multistage of the embodiment is opened
Closing power-supply system includes DC/DC converters 11, and in this embodiment, DC/DC converters 11 are wherein one-stage transfor-mation device, certainly,
The rear class of the DC/DC converters 11 can also connect other power inverters, such as LLC resonant converter.In addition, the embodiment
Multi-stage switching power supply system includes the 3rd relay K3, and the 3rd relay K3, across relay, converts as winged for bypassing DC/DC
Device 11.
The technical scheme of the real-time embodiment, can when requiring the input voltage and equal output voltage of DC/DC converters
By the 3rd relay adhesive, now, DC/DC converters 11 do not work, noenergy loss, therefore improve the multi-stage switching power supply
The operating efficiency of system.
Fig. 5 is the circuit diagram of the utility model multi-stage switching power supply system embodiment two, and in this embodiment, DC/DC becomes
Parallel operation be Fig. 1 shown in One Buck-Boost converter body, moreover, the 3rd relay K31 be connected to input voltage anode Vin+ and
Between the anode Vo+ of output voltage.Certainly, in other embodiments, the 3rd relay K31 is also being attached to input voltage just
Between the second end for holding Vin+ and the first inductance L1.
When the One Buck-Boost converter body is operated in bypass mode, i.e. One Buck-Boost converter body is operated in input electricity
When pressure is equal with output voltage, with reference to Fig. 6, first switch pipe Q1, second switch pipe Q2, the first relay K1, the second relay
K2 is turned off, only the relay K31 of adhesive the 3rd, and now, the 3rd relay K31 becomes the Buck-Boost across relay as winged
Exchanger bypass falls.
Herein it should be noted that, Fig. 5's of One Buck-Boost converter body as shown in Figure 1 and the 3rd relay K31 compositions
Multi-stage switching power supply system, when switching between Three models (Boost patterns, Buck patterns and bypass mode), disconnect phase
Answer relay (the first relay K1 under second relay K2, Boost pattern under Buck patterns, the under bypass mode the 3rd
Relay K3) after, kept for a period of time (such as 100ms), make the relay (second relay K2, Boost under Buck patterns
The 3rd relay K3 under the first relay K1, bypass mode under pattern) charging disconnection, then start next Working mould again
Formula.For example, when Buck patterns are closed, disconnect the second relay K2 and operation mode is adjusted afterwards for a period of time；In Boost
When pattern is closed, disconnect the first relay K1 and operation mode is adjusted afterwards for a period of time.
Above-mentioned first switch pipe, second switch pipe can be the controllable semiconductor devices such as MOSFET, IGBT.
Fig. 7 is the circuit diagram of the utility model multi-stage switching power supply system embodiment three, and in this embodiment, DC/DC becomes
Parallel operation is Buck converters, and the Buck converters include the 3rd switching tube Q3, the 3rd diode D3 and the second inductance L2, the 3rd
The anode Vin+ of switching tube Q3 first end connection input voltage, the 3rd switching tube Q3 the second end connect the of the second inductance L2
One end, the anode Vo+, the 3rd diode D3 of the second inductance L2 the second end connection output voltage negative pole connect the 3rd switching tube
Q3 the second end, the 3rd diode D3 positive pole connect the negative terminal Vin- of the input voltage and negative terminal Vo- of output voltage respectively, the
Three electric capacity C3 are connected between the anode Vin+ of input voltage and negative terminal Vin-, and the 4th electric capacity C4 is connected to the anode of output voltage
Between Vo+ and negative terminal Vo-, the 3rd electric capacity C3 and the 4th electric capacity C4 play pressure stabilization function respectively.In addition, the 3rd relay K32 connections
Between the 3rd switching tube Q3 first end and its second end.
Fig. 8 is the circuit diagram of the utility model multi-stage switching power supply system embodiment four, and the multiple-pole switch of the embodiment is electric
Source system compares the embodiment shown in Fig. 7, and different is only：3rd relay K33 is connected to the anode Vin+ of input voltage
And between the anode Vo+ of output voltage.
Fig. 9 is the circuit diagram of the utility model multi-stage switching power supply system embodiment five, and in this embodiment, DC/DC becomes
Parallel operation is Boost, and the Boost includes the 4th switching tube Q4, the 4th diode D4 and the 3rd inductance L3, the
The anode Vin+, the 3rd inductance L3 of three inductance L3 first end connection input voltage the second end are connecting the 4th diode D4 just
Pole, the anode Vo+ of the 4th diode D4 negative pole connection output voltage, the 4th switching tube Q4 first end connect the 3rd inductance L3
The second end, the 4th switching tube Q4 the second end connects the negative terminal Vin- of the input voltage and negative terminal Vo- of output voltage respectively.The
Five electric capacity C5 are connected between the anode Vin+ of input voltage and negative terminal Vin-, and the 6th electric capacity C6 is connected to the anode of output voltage
Between Vo+ and negative terminal Vo-, the 5th electric capacity C5 and the 6th electric capacity C6 play pressure stabilization function respectively.In addition, the 3rd relay K34 connections
Between the anode Vin+ of input voltage and the anode Vo+ of output voltage.
Figure 10 is the circuit diagram of the utility model multi-stage switching power supply system embodiment six, and the multiple-pole switch of the embodiment is electric
Source system compares the embodiment shown in Fig. 9, and different is only：3rd relay K35 is connected to the 4th diode D4 positive pole
And its between negative pole.
Preferred embodiment of the present utility model is the foregoing is only, is not limited to the utility model, for this
For the technical staff in field, the utility model can have various modifications and variations.It is all in the spirit and principles of the utility model
Within, made it is any distort, equivalent substitution, improvement etc., should be included within right of the present utility model.
Claims (5)
1. a kind of One Buck-Boost converter body, including the first inductance, first switch pipe, second switch pipe, the first diode and
Two diodes, moreover, the anode of the input voltage of the One Buck-Boost converter body connects the first end of the first switch pipe,
The anode of the output voltage of the One Buck-Boost converter body connects the negative pole of second diode, and the Buck-Boost becomes
The negative terminal of the input voltage of parallel operation connects the positive pole of first diode, the second end of the second switch pipe and described respectively
The negative terminal of the output voltage of One Buck-Boost converter body, the first end of first inductance connect the first switch pipe respectively
Second end and the negative pole of first diode, the second end of first inductance connect the positive pole of second diode respectively
And the first end of the second switch pipe, it is characterised in that the One Buck-Boost converter body also includes：
It is in parallel with the first switch pipe, and for entering in the case where the first switch pipe is straight-through to the first switch pipe
First relay of row bypass；And
With second diodes in parallel, and for entering in the case where second diode is straight-through to second diode
Second relay of row bypass.
2. One Buck-Boost converter body according to claim 1, it is characterised in that first relay and described second
Relay acts under no-voltage operating mode respectively.
3. One Buck-Boost converter body according to claim 1, it is characterised in that also including the first electric capacity and the second electricity
Hold, moreover, between the anode and negative terminal of input voltage of first capacitance connection in the One Buck-Boost converter body；It is described
Second capacitance connection is between the anode and negative terminal of the output voltage of the One Buck-Boost converter body.
4. a kind of multi-stage switching power supply system, including DC/DC converters, it is characterised in that also include being used to bypass the DC/DC
3rd relay of converter, the DC/DC converters are any one of claim 1-3 One Buck-Boost converter body.
5. multi-stage switching power supply system according to claim 4, it is characterised in that
3rd relay is connected to the anode of the input voltage of the One Buck-Boost converter body and the Buck-Boost
Between the anode of the output voltage of converter；Or
3rd relay be connected to the input voltage of the One Buck-Boost converter body anode and the first inductance second
Between end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720067110.9U CN206686081U (en) | 2017-01-18 | 2017-01-18 | A kind of multi-stage switching power supply system and Buck Boosts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720067110.9U CN206686081U (en) | 2017-01-18 | 2017-01-18 | A kind of multi-stage switching power supply system and Buck Boosts |
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| CN201720067110.9U Active CN206686081U (en) | 2017-01-18 | 2017-01-18 | A kind of multi-stage switching power supply system and Buck Boosts |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109713901A (en) * | 2019-01-10 | 2019-05-03 | 江苏工程职业技术学院 | A kind of end Boost coupling inductance formula buck translation circuit and control method |
| CN110798069A (en) * | 2018-08-01 | 2020-02-14 | 中兴通讯股份有限公司 | DC converter, and control method and device for DC converter |
| CN112910251A (en) * | 2021-01-27 | 2021-06-04 | 维沃移动通信有限公司 | Electronic equipment and control method thereof |
| CN113824325A (en) * | 2021-08-17 | 2021-12-21 | 广州金升阳科技有限公司 | Two-stage type switching power supply circuit |
-
2017
- 2017-01-18 CN CN201720067110.9U patent/CN206686081U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110798069A (en) * | 2018-08-01 | 2020-02-14 | 中兴通讯股份有限公司 | DC converter, and control method and device for DC converter |
| CN109713901A (en) * | 2019-01-10 | 2019-05-03 | 江苏工程职业技术学院 | A kind of end Boost coupling inductance formula buck translation circuit and control method |
| CN112910251A (en) * | 2021-01-27 | 2021-06-04 | 维沃移动通信有限公司 | Electronic equipment and control method thereof |
| CN113824325A (en) * | 2021-08-17 | 2021-12-21 | 广州金升阳科技有限公司 | Two-stage type switching power supply circuit |
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Address after: 710065 R&D Building E206-2, E Building, No. 211 Tiangu Eighth Road, Xi'an High-tech Zone, Shaanxi Province Patentee after: Xi'an Telai Intelligent Charging Technology Co.,Ltd. Address before: 710065 R&D Building E206-2, E Building, No. 211 Tiangu Eighth Road, Xi'an High-tech Zone, Shaanxi Province Patentee before: XI'AN TGOOD INTELLIGENT CHARGING TECHNOLOGY Co.,Ltd. |