CN106849684A - A kind of self-excitation push-pull converter - Google Patents
A kind of self-excitation push-pull converter Download PDFInfo
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- CN106849684A CN106849684A CN201710068918.3A CN201710068918A CN106849684A CN 106849684 A CN106849684 A CN 106849684A CN 201710068918 A CN201710068918 A CN 201710068918A CN 106849684 A CN106849684 A CN 106849684A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/337—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration
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- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of self-excitation push-pull converter, including：Push-pull oscillator circuit；It is connected with push-pull oscillator circuit, the biased electrical flow control circuit of the bias current size of control input push-pull oscillator circuit.In the technical program, there is provided biased electrical flow control circuit receives corresponding control signal, to control extraneous input power to be input into the size of the bias current of the push-pull oscillator circuit, when the output loading of self-excitation push-pull converter changes, can be according to the power demand of output loading, control bias current control the regulation of electrical circuit is input into the bias current size of push-pull oscillator circuit, so that the power output of self-excitation push-pull converter disclosure satisfy that the demand of load, simultaneously, because the power output of the self-excitation push-pull converter can be to be adjusted according to the demand of output loading, therefore, it is possible to be changed according to load, the power consumption of Reasonable adjustment converter, reduce the unnecessary wasting of resources.
Description
Technical field
The present invention relates to converter field, more particularly to a kind of self-excitation push-pull converter.
Background technology
Since occurring from last century self-oscillation push-pull transistor single phase transformer DC converter, self-excitation push-pull converter is obtained
To being widely applied.
Small-power isolates the conventional topological structure of DC-DC converter during Royer type self-excitation push-pull converters, with circuit device
Part is few, the features such as low cost and reliability high.In being normally applied, the peak power output of the self-excitation push-pull converter is fixed, empty
Input current is carried to fix.In general, power output is bigger, and unloaded input current is bigger.
In some distinctive application scenarios, the output loading of self-excitation push-pull converter is not fixed, different time sections
In specific load behavior.The output of self-excitation push-pull converter needs to meet the demand of load as far as possible.Current self-excitation is pushed away
Converter is drawn when output loading is reduced, bias current will not occur obvious change, converter remains same unloaded work(
Consumption, especially for some power work states in the application scenario of unloaded, fully loaded switching, keeps unloaded work(higher when unloaded
Consumption is unnecessary waste.
Therefore, how to cause that the output of self-excitation push-pull converter can meet the demand of load, can be changed according to load again
The power consumption of Reasonable adjustment converter, is the current technical issues that need to address of those skilled in the art.
The content of the invention
It is an object of the invention to provide a kind of self-excitation push-pull converter, can cause that the output of self-excitation push-pull converter can
Meet the demand of load, again can be according to the power consumption of load change Reasonable adjustment converter.
In order to solve the above technical problems, the invention provides following technical scheme：
A kind of self-excitation push-pull converter, including：Push-pull oscillator circuit；It is connected with the push-pull oscillator circuit, control input
The biased electrical flow control circuit of the bias current size of the push-pull oscillator circuit.
Preferably, the biased electrical flow control circuit includes：Variable resistance part, the first fixing end of the variable resistance part
It is connected with extraneous input power, the bias current input of second fixing end and the push-pull oscillator circuit of the variable resistance part
End connection.
Preferably, the variable resistance part includes：First resistor, second resistance and first switch pipe, wherein, described first
The first end connection of the source electrode of switching tube and the extraneous input power and the first resistor, the leakage of the first switch pipe
The first end connection of pole and the second resistance, the second end connection at second end and the second resistance of the first resistor,
The bias current inputs connection at second end and the push-pull oscillator circuit of the first resistor.
Preferably, the biased electrical flow control circuit includes：Variable current source, the first fixing end of the variable current source
It is connected with extraneous input power, the bias current input of second fixing end and the push-pull oscillator circuit of the variable current source
End connection.
Preferably, also include：The first electric capacity being connected with the biased electrical flow control circuit, wherein, first electric capacity
With the bias current inputs connection of the common port and the push-pull oscillator circuit of the biased electrical flow control circuit, described first
Electric capacity is grounded away from one end of the biased electrical flow control circuit.
Preferably, the push-pull oscillator circuit includes：First coil winding, second coil winding, the first triode, second
Triode, tertiary coil winding, the 4th coil windings and the 5th coil windings, wherein, the first end of the first coil winding
The second end with the second coil winding connects, the base stage of the second end of the first coil winding and first triode
The second end connection of connection, the colelctor electrode of first triode and the tertiary coil winding, the hair of first triode
The base of the emitter stage connection of emitter-base bandgap grading and second triode, the first end of the second coil winding and second triode
Pole connects, the first end connection of the colelctor electrode of second triode and the 4th coil windings, the tertiary coil winding
First end and the 4th coil windings the connection of the second end, the tertiary coil winding and the 4th coil windings are to become
Depressor primary coil winding, the 5th coil windings are transformer secondary coil winding, the first coil winding and described
Second coil winding is converter feedback coil winding, wherein, the first coil winding, second coil winding, tertiary coil
Winding, the 4th coil windings, the 5th coil windings are wound on the same magnetic core of the transformer, and the of the first coil winding
One end connects the output end of the biased electrical flow control circuit, the extraneous input power of first end connection of the tertiary coil winding
Input, the grounded emitter of first triode.
Preferably, also include：The filter capacitor being connected with the extraneous input power.
Compared with prior art, above-mentioned technical proposal has advantages below：
A kind of self-excitation push-pull converter that the embodiment of the present invention is provided, including：Push-pull oscillator circuit；With push-pull oscillator electricity
Road connects, the biased electrical flow control circuit of the bias current size of control input push-pull oscillator circuit.In the technical program, if
Biased electrical flow control circuit is put to receive corresponding control signal, the push-pull oscillator has been input into the input power for controlling the external world
The size of the bias current of circuit, when the output loading of self-excitation push-pull converter changes, can be according to the power of output loading
Demand, control bias current control the regulation of electrical circuit is input into the bias current size of push-pull oscillator circuit, so that self-excitation is pushed away
The power output for drawing converter disclosure satisfy that the demand of load, simultaneously as the power output of the self-excitation push-pull converter is can
With what is be adjusted according to the demand of output loading, therefore, it is possible to be changed according to load, the power consumption of Reasonable adjustment converter is reduced
The unnecessary wasting of resources.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are the present invention
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
These accompanying drawings obtain other accompanying drawings.
The self-excitation push-pull converter structural representation that Fig. 1 is provided by a kind of specific embodiment of the invention；
The self-excitation push-pull converter electrical block diagram that Fig. 2 is provided by a kind of specific embodiment of the invention；
Fig. 3 is the self-excitation push-pull converter electrical block diagram that another kind specific embodiment of the invention is provided；
Fig. 4 is the self-excitation push-pull converter electrical block diagram that another specific embodiment of the invention is provided；
Fig. 5 is the self-excitation push-pull converter electrical block diagram that another specific embodiment of the invention is provided.
Specific embodiment
Core of the invention is to provide a kind of self-excitation push-pull converter, can cause that the output of self-excitation push-pull converter can
Meet the demand of load, again can be according to the power consumption of load change Reasonable adjustment converter.
In order that the above objects, features and advantages of the present invention can become apparent it is understandable, below in conjunction with the accompanying drawings to this hair
Bright specific embodiment is described in detail.
Elaborate detail in order to fully understand the present invention in the following description.But the present invention can with it is various not
It is same as other manner described here to implement, those skilled in the art can do class in the case of without prejudice to intension of the present invention
Like popularization.Therefore the present invention is not limited by following public specific embodiment.
Refer to Fig. 1, the self-excitation push-pull converter structural representation that Fig. 1 is provided by a kind of specific embodiment of the invention
Figure.
A kind of specific embodiment of the invention provides a kind of self-excitation push-pull converter, including：Push-pull oscillator circuit 1；
It is connected with push-pull oscillator circuit 1, the biased electrical flow control circuit 2 of the bias current size of control input push-pull oscillator circuit 1.
In the present embodiment, there is provided biased electrical flow control circuit receives corresponding control signal, controlling the external world
Input power be input into the push-pull oscillator circuit bias current size, when the output loading of self-excitation push-pull converter changes
When, bias current control the regulation of electrical circuit can be controlled to be input into inclined to push-pull oscillator circuit according to the power demand of output loading
Size of current is put, so that the power output of self-excitation push-pull converter disclosure satisfy that the demand of load, simultaneously as the self-excitation
The power output of push-pull converter can be to be adjusted according to the demand of output loading, therefore, it is possible to be changed according to load,
The power consumption of Reasonable adjustment converter, reduces the unnecessary wasting of resources.
Fig. 2 is refer to, Fig. 2 is shown by the self-excitation push-pull converter circuit structure that a kind of specific embodiment of the invention is provided
It is intended to.
In one embodiment of the invention, biased electrical flow control circuit 2 includes two fixing ends and a control end,
The input Vin connections of the first fixing end of biased electrical flow control circuit 2 and extraneous input power, in push-pull oscillator circuit 1
The second fixing end connection of bias current inputs and biased electrical flow control circuit 2.
In the present embodiment, push-pull oscillator circuit 1 includes：First coil winding 11, second coil winding the 12, the 1st
Pole pipe 13, the second triode 14, tertiary coil winding 15, the 4th coil windings 16 and the 5th coil windings 17, wherein, First Line
Enclose the second end connection of the first end and second coil winding 12 of winding 11, second end and the one or three pole of first coil winding 11
The base stage connection of pipe 13, the second end connection of the colelctor electrode and tertiary coil winding 15 of the first triode 13, the first triode 13
Emitter stage and the second triode 14 emitter stage connection, the base stage of the first end of second coil winding 12 and the second triode 14
Connection, the first end connection of the colelctor electrode and the 4th coil windings 16 of the second triode 14, the first end of tertiary coil winding 15
Connected with the second end of the 4th coil windings 16, the coil windings 16 of tertiary coil winding 15 and the 4th be transformer around
Group, the 5th coil windings 17 are transformer secondary coil winding, and first coil winding 11 and second coil winding 12 are converter
Feedback coil winding, wherein, first coil winding 11, second coil winding 12, tertiary coil winding 15, the 4th coil windings
16th, the 5th coil windings 17 are wound on the same magnetic core of transformer, the first end connection bias current control of first coil winding 11
The output end of circuit processed, the input Vin of the extraneous input power of first end connection of tertiary coil winding 15, the first triode 13
Grounded emitter.
Further, the self-excitation push-pull converter also includes：The first electric capacity 3 being connected with biased electrical flow control circuit 2, its
In, the bias current inputs connection of the common port and push-pull oscillator circuit 1 of the first electric capacity 3 and biased electrical flow control circuit 2, the
One electric capacity 3 is grounded away from one end of biased electrical flow control circuit 2.Further, also include：It is connected with extraneous input power
Filter capacitor 4.
In the present embodiment, the control end of biased electrical flow control circuit receives control signal, so as to control extraneous input
The input Vin of power supply flows into the size of current of first coil winding and second coil winding common port, and then controls self-excitation to push away
Draw the power output of converter.Wherein, the setting of the first electric capacity forms a soft start, when the self-excitation push-pull converter connects outer
During boundary's input power, the first electric capacity causes that whole self-excitation push-pull converter will not start due to the high pressure of moment.It is outer connecting
The moment of boundary's input power, the first electric capacity carries out soft start, and the control of biased electrical flow control circuit flows into the inclined of push-pull oscillator circuit
Size of current is put, push-pull oscillator circuit carries out push-pull oscillator.First coil winding, second coil winding, tertiary coil winding,
Four coil windings and the 5th coil windings constitute a windings section for transformer, tertiary coil winding and the 4th coil windings
It is the primary coil of the transformer, the 5th coil windings are the secondary coil of the transformer, it is defeated to loading from the 5th coil windings
Go out alternating voltage, first coil winding and second coil winding are converter feedback coil winding.
It should be noted that the input Vin of extraneous input power is the power access end of the self-excitation push-pull converter.
Fig. 3, Fig. 4 and Fig. 5 are refer to, Fig. 3 is that conversion is recommended in the self-excitation that another kind specific embodiment of the invention is provided
Device electrical block diagram；Fig. 4 is the self-excitation push-pull converter circuit structure that another specific embodiment of the invention is provided
Schematic diagram；Fig. 5 is the self-excitation push-pull converter electrical block diagram that another specific embodiment of the invention is provided.
In one embodiment of the invention, biased electrical flow control circuit 2 includes：Variable resistance part, variable resistance part
The first fixing end be connected with extraneous input power, second fixing end and the bias current of push-pull oscillator circuit of variable resistance part
Input is connected.
As shown in figure 3, the Vin ends connection of one end of variable resistance part 2 and extraneous input power.The other end and first coil
The common port of the common port connection of winding 11 and second coil winding 12, first coil winding 11 and second coil winding 12 is to push away
The bias current inputs of oscillating circuit 1 are drawn, the end also connects with the first electric capacity 3.
Further, as shown in figure 4, variable resistance part 2 includes in one embodiment of the invention：First resistor
21st, second resistance 22 and first switch pipe 23, wherein, the source electrode and external world's input power and first resistor of first switch pipe 23
21 first end connection, the drain electrode of first switch pipe 23 and the first end connection of second resistance 22, the second end of first resistor 21
The second end with second resistance 22 connects, and the second end of first resistor 21 and the bias current inputs of push-pull oscillator circuit 1 connect
Connect.
In the present embodiment, the grid of first switch pipe receives extraneous control signal as control end, when the external world is defeated
When the voltage difference of the input Vin and control end that enter power supply reaches the conducting voltage of first switch pipe, the conducting of first switch pipe, this
When variable resistance part all-in resistance be about first resistor and second resistance value in parallel, bias current rises, and quiescent dissipation increases,
Converter power output increases；As the input Vin of extraneous input power with the voltage difference of control end less than first switch pipe
During conducting voltage, the cut-off of first switch pipe, the all-in resistance of variable resistance part is about the resistance size of first resistor, under bias current
Drop, quiescent dissipation is reduced, and converter power output reduces.It is input into certain magnitude of voltage to control variable resistance part by control end
The change of resistance, to adjust the bias current size of input to push-pull oscillator circuit, so that self-excitation push-pull converter is defeated
Go out the demand that power disclosure satisfy that load, and changed according to load, the power consumption of Reasonable adjustment converter, reduce unnecessary resource
Waste.
In another embodiment of the invention, biased electrical flow control circuit includes variable current source, variable current source
The first fixing end be connected with extraneous input power, second fixing end and the bias current of push-pull oscillator circuit of variable current source
Input is connected.As shown in figure 3, the Vin ends connection of one end of variable current source 2 and extraneous input power.Variable current source is another
One end and first coil winding and second coil winding common port connection, the end also with the first capacitance connection.
In sum, a kind of self-excitation push-pull converter provided by the present invention, there is provided biased electrical flow control circuit connects
Corresponding control signal is received, the size of the bias current of the push-pull oscillator circuit is input into the input power for controlling the external world, when
When the output loading of self-excitation push-pull converter changes, bias current control electricity can be controlled according to the power demand of output loading
Road adjustment is input into the bias current size of push-pull oscillator circuit, so that the power output of self-excitation push-pull converter can expire
The demand of foot load, simultaneously as the power output of the self-excitation push-pull converter can be to be carried out according to the demand of output loading
Regulation, therefore, it is possible to be changed according to load, the power consumption of Reasonable adjustment converter reduces the unnecessary wasting of resources.
A kind of self-excitation push-pull converter provided by the present invention is described in detail above.It is used herein specifically
Individual example is set forth to principle of the invention and implementation method, and the explanation of above example is only intended to help and understands the present invention
And its core concept.It should be pointed out that for those skilled in the art, before the principle of the invention is not departed from
Put, some improvement and modification can also be carried out to the present invention, these are improved and modification also falls into the guarantor of the claims in the present invention
In the range of shield.
Claims (7)
1. a kind of self-excitation push-pull converter, it is characterised in that including：Push-pull oscillator circuit；It is connected with the push-pull oscillator circuit,
The biased electrical flow control circuit of the bias current size of push-pull oscillator circuit described in control input.
2. self-excitation push-pull converter according to claim 1, it is characterised in that the biased electrical flow control circuit includes：
Variable resistance part, the first fixing end of the variable resistance part is connected with extraneous input power, and the second of the variable resistance part
The bias current inputs connection of fixing end and the push-pull oscillator circuit.
3. self-excitation push-pull converter according to claim 2, it is characterised in that the variable resistance part includes：First electricity
Resistance, second resistance and first switch pipe, wherein, the source electrode of the first switch pipe and the extraneous input power and described the
The first end connection of one resistance, the drain electrode of the first switch pipe and the first end of the second resistance are connected, first electricity
The second end connection at second end and the second resistance of resistance, the second end of the first resistor and the push-pull oscillator circuit
Bias current inputs are connected.
4. self-excitation push-pull converter according to claim 1, it is characterised in that the biased electrical flow control circuit includes：
Variable current source, the first fixing end of the variable current source is connected with extraneous input power, and the second of the variable current source
The bias current inputs connection of fixing end and the push-pull oscillator circuit.
5. self-excitation push-pull converter according to claim 1, it is characterised in that also include：Controlled with the bias current
First electric capacity of circuit connection, wherein, the common port of first electric capacity and the biased electrical flow control circuit and described recommend
The bias current inputs connection of oscillating circuit, first electric capacity is grounded away from one end of the biased electrical flow control circuit.
6. the self-excitation push-pull converter according to any one of claim 1 to 5, it is characterised in that the push-pull oscillator circuit
Including：First coil winding, second coil winding, the first triode, the second triode, tertiary coil winding, the 4th coil around
Group and the 5th coil windings, wherein, the second end connection of the first end and the second coil winding of the first coil winding,
The base stage connection of the second end of the first coil winding and first triode, the colelctor electrode of first triode and institute
State the emitter stage company of the second end connection of tertiary coil winding, the emitter stage of first triode and second triode
Connect, the base stage connection of the first end of the second coil winding and second triode, the colelctor electrode of second triode
Connected with the first end of the 4th coil windings, the of the first end of the tertiary coil winding and the 4th coil windings
Two ends connect, and the tertiary coil winding and the 4th coil windings are transformer winding, the 5th coil
Winding is transformer secondary coil winding, the first coil winding and the second coil winding be converter feedback coil around
Group, wherein, the first coil winding, second coil winding, tertiary coil winding, the 4th coil windings, the 5th coil windings
It is wound on the same magnetic core of the transformer, the first end of the first coil winding connects the biased electrical flow control circuit
Output end, the input of the extraneous input power of first end connection of the tertiary coil winding, the transmitting of first triode
Pole is grounded.
7. self-excitation push-pull converter according to claim 6, it is characterised in that also include：With the extraneous input power
The filter capacitor of connection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710068918.3A CN106849684A (en) | 2017-02-08 | 2017-02-08 | A kind of self-excitation push-pull converter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710068918.3A CN106849684A (en) | 2017-02-08 | 2017-02-08 | A kind of self-excitation push-pull converter |
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| CN106849684A true CN106849684A (en) | 2017-06-13 |
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| CN201710068918.3A Pending CN106849684A (en) | 2017-02-08 | 2017-02-08 | A kind of self-excitation push-pull converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117277780A (en) * | 2023-09-21 | 2023-12-22 | 北京林业大学 | Micro-energy collection circuit based on self-excitation push-pull converter |
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| JPS60194765A (en) * | 1984-03-16 | 1985-10-03 | Hitachi Lighting Ltd | Transistor inverter |
| CN2071861U (en) * | 1990-04-06 | 1991-02-20 | 孙淑清 | Automatic electricity-saving controller with low voltage glow-starting function |
| CN102299658A (en) * | 2011-07-18 | 2011-12-28 | 广州金升阳科技有限公司 | Self-excited push-pull converter |
| CN102315778A (en) * | 2011-09-14 | 2012-01-11 | 广州金升阳科技有限公司 | Self-excitation push-pull type converter |
| CN102541143A (en) * | 2010-12-21 | 2012-07-04 | 安凯(广州)微电子技术有限公司 | Method for dynamically adjusting power consumption of audio decoder, system and multimedia equipment |
| CN103052245A (en) * | 2013-01-06 | 2013-04-17 | 周玉林 | Domestic small-power emergency lighting lamp |
| CN206524765U (en) * | 2017-02-08 | 2017-09-26 | 广州致远电子股份有限公司 | A kind of self-excitation push-pull converter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60194765A (en) * | 1984-03-16 | 1985-10-03 | Hitachi Lighting Ltd | Transistor inverter |
| CN2071861U (en) * | 1990-04-06 | 1991-02-20 | 孙淑清 | Automatic electricity-saving controller with low voltage glow-starting function |
| CN102541143A (en) * | 2010-12-21 | 2012-07-04 | 安凯(广州)微电子技术有限公司 | Method for dynamically adjusting power consumption of audio decoder, system and multimedia equipment |
| CN102299658A (en) * | 2011-07-18 | 2011-12-28 | 广州金升阳科技有限公司 | Self-excited push-pull converter |
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| CN117277780A (en) * | 2023-09-21 | 2023-12-22 | 北京林业大学 | Micro-energy collection circuit based on self-excitation push-pull converter |
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Application publication date: 20170613 |