CN205584026U - From positive violent change parallel operation that restores to throne - Google Patents
From positive violent change parallel operation that restores to throne Download PDFInfo
- Publication number
- CN205584026U CN205584026U CN201620390147.0U CN201620390147U CN205584026U CN 205584026 U CN205584026 U CN 205584026U CN 201620390147 U CN201620390147 U CN 201620390147U CN 205584026 U CN205584026 U CN 205584026U
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- diode
- electric capacity
- inductance
- forward converter
- circuit
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Abstract
The utility model discloses a from positive violent change parallel operation that restores to throne, including positive violent change parallel operation main circuit, excitation energy storage circuit and excitation energy transduction circuit, positive violent change parallel operation main circuit includes high -frequency transformer T1, switch tube Q1, diode D1, diode D2, inductance L1 and electric capacity C1, excitation energy storage circuit includes diode D3 and electric capacity C2, and diode D3's positive pole and diode D1's negative pole are connected, and diode D3's negative pole and electric capacity C2's one end are connected, and electric capacity C2's the other end and diode D1's positive pole are connected, excitation energy transduction circuit includes diode D4 and inductance L2, and diode D4's positive pole and diode D3's negative pole are connected, and diode D4's negative pole and inductance L2's one end are connected, and inductance L2's the other end is connected with the anodal voltage output end OUT+ of positive violent change parallel operation main circuit. The utility model discloses a reasonable in design, energy utilization is high, convenient to popularize and use.
Description
Technical field
This utility model belongs to switch power technology field, is specifically related to the forward conversion of a kind of Self-resetting
Device.
Background technology
In numerous switching power circuit topologys, forward converter circuit structure is simple, low cost,
The performance characteristics of many excellences such as input and output electrical isolation, functional reliability are high so that it is by industry
Extensive concern.Due to the magnetic core of transformer unidirectional magnetiztion of forward converter and itself there is no magnetic reset merit
Can, the problems such as magnetic core is saturated may be caused, greatly limit the popularization of forward converter,
So magnetic core must be avoided saturated by additional magnetic reset circuit.Currently exciting converter magnetic reset circuit
Kind is more, but major part is required for other circuit additional, is unfavorable for the miniaturization of power module.
Common magnetic reset mode specifically includes that RCD circuit magnetic reset, reset winding magnetic reset, LCD
Resonant magnetic reset, active clamp etc., its dominant mechanism is that switching tube is closed the excitation having no progeny on transformator
Energy returns to input power, or by these energy expenditures on resistance or other energy dissipation devices.
RCD clamp technology has the advantages such as circuit is simple, and its deficiency is at clamp resistance by magnetization energy consumption
In, reduce the whole efficiency of system.It is a kind of function admirable that active clamp technology realizes magnetic reset
Method, its deficiency is the increase in the complexity of converter circuit and design difficulty thereof and cost.Use magnetic
The advantage of the forward converter of reset winding is that technology maturation is reliable, and magnetization energy can feed back to input electricity
In source, but additional magnetic reset winding makes transformer device structure complicate, and adds power switch
The voltage stress of pipe.
Utility model content
Technical problem to be solved in the utility model is, for above-mentioned deficiency of the prior art, to carry
For the forward converter of a kind of Self-resetting, its circuit structure is simple, reasonable in design, and capacity usage ratio is high,
Realizing convenient and low cost, practical, service life is long, it is simple to promote the use of.
For solving above-mentioned technical problem, the technical solution adopted in the utility model is: a kind of Self-resetting is just
Exciting converter, it is characterised in that: include forward converter main circuit, magnetization energy storage circuit and encourage
Magnetic energy carry circuit, described magnetization energy carry circuit and magnetization energy storage circuit is connected, described in encourage
Magnetic energy storage circuit and magnetization energy carry circuit are all connected with forward converter main circuit；Described normal shock
Inverter main circuit includes high frequency transformer T1, switching tube Q1, diode D1, diode D2, inductance
L1 and electric capacity C1, the described grid of switching tube Q1 is connected with the outfan of peripheral control unit, described switch
The drain electrode of pipe Q1 is connected with one end of a winding W1 of high frequency transformer T1, described high frequency transformer
The cathode voltage input IN+ that the other end is forward converter main circuit of winding W1 of T1 and with outward
The cathode output end of portion's power supply connects, the negative pole that source electrode is forward converter main circuit of described switching tube Q1
Voltage input end IN-and being connected with the cathode output end of external power source, the anode of described diode D1 is with high
One end of Secondary Winding W2 of frequency power transformer T1 connects, the negative electrode of described diode D1 and diode D2
Negative electrode all one end with inductance L1 be connected, the other end of described inductance L1 is connected with one end of electric capacity C1
And be the cathode voltage outfan OUT+ of forward converter main circuit, the anode of described diode D2 and electricity
Hold the other end all other ends with Secondary Winding W2 of high frequency transformer T1 of C1 to be connected and be forward conversion
The cathode voltage outfan OUT-of device main circuit；Described magnetization energy storage circuit include diode D3 and
Electric capacity C2, the anode of described diode D3 is connected with the negative electrode of diode D1, described diode D3's
Negative electrode is connected with one end of electric capacity C2, and the other end of described electric capacity C2 is connected with the anode of diode D1；
Described magnetization energy carry circuit includes diode D4 and inductance L2, the anode and two of described diode D4
The negative electrode of pole pipe D3 connects, and the negative electrode of described diode D4 is connected with one end of inductance L2, described inductance
The other end of L2 is connected with the cathode voltage outfan OUT+ of forward converter main circuit.
The forward converter of above-mentioned a kind of Self-resetting, it is characterised in that: described switching tube Q1 is NMOS
Switching tube.
This utility model compared with prior art has the advantage that
1, circuit structure of the present utility model is simple, and magnetic reset loop is positioned at transformer secondary, design
Rationally, capacity usage ratio is high, it is achieved convenient and low cost.
2, this utility model can in conjunction with forward converter circuit and the advantage of anti exciting converter circuit,
Input and output electrical isolation, it is easy to multiple-channel output, integrated circuit is low in energy consumption, magnetic core of transformer utilization rate
Height, practical.
3, job stability of the present utility model and reliability are high, and magnetic reset loop structure is simple, device
Simply, low in energy consumption, transformer utilization factor is high, and energy transmission efficiency is high, and service life is long, it is simple to push away
Wide use.
4, after using this utility model in Switching Power Supply, the job security of Switching Power Supply is with reliable
Property higher, magnetization energy storage circuit and the magnetization energy carry circuit that assisted enable that
Utilization rate improve, more in middle low power applications, can be widely applied to computer, medical communication,
The field such as Industry Control, space equipment.
Below by drawings and Examples, the technical solution of the utility model is done and further retouches in detail
State.
Accompanying drawing explanation
Fig. 1 is schematic block circuit diagram of the present utility model.
Fig. 2 is circuit theory diagrams of the present utility model.
Description of reference numerals:
1 forward converter main circuit；2 magnetization energy storage circuit；3 magnetization energy carry circuits.
Detailed description of the invention
The forward converter of a kind of Self-resetting as shown in Figure 1, including forward converter main circuit 1, encourages
Magnetic energy storage circuit 2 and magnetization energy carry circuit 3, described magnetization energy carry circuit 3 and excitation
Energy storage circuit 2 connects, and described magnetization energy storage circuit 2 and magnetization energy carry circuit 3 are equal
It is connected with forward converter main circuit 1.As in figure 2 it is shown, described forward converter main circuit 1 includes height
Frequency power transformer T1, switching tube Q1, diode D1, diode D2, inductance L1 and electric capacity C1, described
The grid of switching tube Q1 is connected with the outfan of peripheral control unit, the drain electrode of described switching tube Q1 and high frequency
One end of winding W1 of transformator T1 connects, a winding W1's of described high frequency transformer T1
The other end is the cathode voltage input IN+ of forward converter main circuit 1 and defeated with the positive pole of external power source
Go out end to connect, the cathode voltage input that source electrode is forward converter main circuit 1 of described switching tube Q1
IN-and being connected with the cathode output end of external power source, the anode of described diode D1 and high frequency transformer T1
One end of Secondary Winding W2 connect, the negative electrode of described diode D1 and the negative electrode of diode D2 are all with electric
One end of sense L1 connects, and the other end of described inductance L1 is connected with one end of electric capacity C1 and is forward conversion
The anode of the cathode voltage outfan OUT+ of device main circuit 1, described diode D2 and electric capacity C1's is another
One end all other ends with Secondary Winding W2 of high frequency transformer T1 are connected and for forward converter main circuit
The cathode voltage outfan OUT-of 1；Described magnetization energy storage circuit 2 includes diode D3 and electric capacity
C2, the anode of described diode D3 is connected with the negative electrode of diode D1, the negative electrode of described diode D3 with
One end of electric capacity C2 connects, and the other end of described electric capacity C2 is connected with the anode of diode D1；Described encourage
Magnetic energy carry circuit 3 includes diode D4 and inductance L2, the anode of described diode D4 and diode
The negative electrode of D3 connects, and the negative electrode of described diode D4 is connected with one end of inductance L2, described inductance L2
The other end be connected with the cathode voltage outfan OUT+ of forward converter main circuit 1.Wherein, two pole
Pipe D1 is commutation diode, and diode D2 is fly-wheel diode, and inductance L1 is filter inductance, electric capacity
C1 is output filter capacitor；Load resistance RL is connected on the cathode voltage outfan of forward converter main circuit
Between OUT-and cathode voltage outfan OUT+.
In the present embodiment, described switching tube Q1 is nmos switch pipe.
This utility model realizes the detailed process of Self-resetting:
Peripheral control unit output pwm pulse, controls switching tube Q1 periodically turn-on and turn-off；
Terminate the moment that will turn off in switching tube Q1 conducting, the magnetization energy of high frequency transformer T1 reaches
To maximum, the voltage of electric capacity C2 has discharged into zero；
When switching tube Q1 turns off, the voltage of Secondary Winding W2 of high frequency transformer T1 is under upper bearing
Just, the reverse-biased shutoff of diode D1, diode D2 turns on afterflow, now diode D2, inductance L1,
Electric capacity C1 and the cathode voltage outfan OUT-being connected on forward converter main circuit 1 exports with cathode voltage
Load resistance RL between end OUT+ constitutes exoergic loop, continues to provide energy to load resistance RL；
Meanwhile, diode D3 turns on, and diode D3 and electric capacity C2 constitutes magnetization energy storage circuit 2,
Secondary Winding W2 of high frequency transformer T1 is charged to electric capacity C2 by diode D2 and diode D3,
The magnetization energy of high frequency transformer T1 is transferred in electric capacity C2, the excitation electricity of high frequency transformer T1
Stream is gradually reduced, until being reduced to zero, before next turn-on cycle arrives, and high frequency transformer T1
Magnetization energy be transferred completely in electric capacity C2, the voltage at electric capacity C2 two ends is charged to maximum；Electricity
Sense L2, diode D2, diode D3, diode D4 and load resistance RL constitute energy release
Loop, inductance L2 provides energy to load resistance RL；
During switching tube Q1 turns off, when the voltage of the cathode terminal of diode D3 is more than forward converter
During the output voltage Vo of main circuit 1, diode D4 turns on, at the exciting current of high frequency transformer T1
Before being reduced to zero, a part of exciting current flows to outfan by inductance L2, to load resistance RL
Energy is provided；Another part exciting current continues to charge electric capacity C2, and electric capacity C2 both end voltage continues
Increase, until exciting current is reduced to zero；Exciting current at high frequency transformer T1 be reduced to zero and
When the next cycle of opening does not arrives, electric capacity C2 will be by diode D4, inductance L2 to load
Resistance RL provides energy, until the cathode terminal voltage of diode D3 is equal to output voltage Vo；Now,
Electric capacity C2 stops exoergic, and the voltage at electric capacity C2 two ends no longer changes, inductance L2, load resistance RL,
Diode D2, diode D3 and diode D4 constitute energy Releasing loop, to load resistance RL
Release energy, open cycle arrival until next；
When the next one opens cycle arrival, switching tube Q1 turns on, and outer power voltage Vi adds
At winding W1 two ends of high frequency transformer T1, high frequency transformer T1 by voltage from a winding
W1 is coupled to Secondary Winding W2, and now, the voltage of a winding W1 of high frequency transformer T1 is upper
Just lower negative, the voltage of Secondary Winding W2 couple with winding W1 also just lower is born for upper, diode
D1 turns on, and is charged and electric capacity C1 to load resistance RL offer energy by inductance L1；Now,
Forward converter main circuit 1 normally works；Simultaneously as electric capacity C2 both end voltage can not be suddenlyd change, make
The voltage of the cathode terminal obtaining diode D3 raises the most rapidly, and the anode tap higher than diode D3
Voltage, diode D3 is not turned on, and electric capacity C2 is allowed to discharge through inductance L2 and shifts to load resistance RL
Energy, charges to inductance L2 simultaneously, until the voltage of electric capacity C2 is reduced to zero, i.e. in electric capacity C2
Stored whole energy are by the magnetization energy carry circuit 3 being made up of diode D4 and inductance L2
It is transferred to load resistance RL；When the voltage of electric capacity C2 is reduced to zero, switching tube Q1 is still in conducting
State, now Secondary Winding W2 of high frequency transformer T1, diode D1, diode D3, diode
D4, inductance L2 and load resistance RL constitute energy Releasing loop, discharge energy to load resistance RL
Amount, charges to inductance L2 simultaneously, until the next shutoff cycle arrives.
The above, be only preferred embodiment of the present utility model, not makees this utility model any
Limit, every according to this utility model technical spirit, above example is made any simple modification,
Change and equivalent structure change, all still fall within the protection domain of technical solutions of the utility model.
Claims (2)
1. the forward converter of a Self-resetting, it is characterised in that: include forward converter main circuit (1),
Magnetization energy storage circuit (2) and magnetization energy carry circuit (3), described magnetization energy carry circuit
(3) it is connected with magnetization energy storage circuit (2), described magnetization energy storage circuit (2) and excitation
Energy transfer circuits (3) is all connected with forward converter main circuit (1)；The main electricity of described forward converter
Road (1) include high frequency transformer T1, switching tube Q1, diode D1, diode D2, inductance L1 and
Electric capacity C1, the described grid of switching tube Q1 is connected with the outfan of peripheral control unit, described switching tube Q1
Drain electrode be connected with one end of a winding W1 of high frequency transformer T1, the one of described high frequency transformer T1
The other end of secondary winding W1 is the cathode voltage input IN+ of forward converter main circuit (1) and with outward
The cathode output end of portion's power supply connects, and the source electrode of described switching tube Q1 is forward converter main circuit (1)
Cathode voltage input IN-and be connected with the cathode output end of external power source, the sun of described diode D1
Pole is connected with one end of Secondary Winding W2 of high frequency transformer T1, the negative electrode of described diode D1 and two poles
The negative electrode of pipe D2 all one end with inductance L1 are connected, the other end of described inductance L1 and the one of electric capacity C1
End connects and is the cathode voltage outfan OUT+, described diode D2 of forward converter main circuit (1)
Anode and the other end all other ends with Secondary Winding W2 of high frequency transformer T1 of electric capacity C1 are connected and
Cathode voltage outfan OUT-for forward converter main circuit (1)；Described magnetization energy storage circuit
(2) include that diode D3 and electric capacity C2, the anode of described diode D3 connect with the negative electrode of diode D1
Connecing, the negative electrode of described diode D3 is connected with one end of electric capacity C2, the other end and two of described electric capacity C2
The anode of pole pipe D1 connects；Described magnetization energy carry circuit (3) includes diode D4 and inductance L2,
The anode of described diode D4 is connected with the negative electrode of diode D3, the negative electrode of described diode D4 and inductance
One end of L2 connects, the other end of described inductance L2 and the cathode voltage of forward converter main circuit (1)
Outfan OUT+ connects.
2. according to the forward converter of a kind of Self-resetting described in claim 1, it is characterised in that: institute
Stating switching tube Q1 is nmos switch pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620390147.0U CN205584026U (en) | 2016-05-03 | 2016-05-03 | From positive violent change parallel operation that restores to throne |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620390147.0U CN205584026U (en) | 2016-05-03 | 2016-05-03 | From positive violent change parallel operation that restores to throne |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205584026U true CN205584026U (en) | 2016-09-14 |
Family
ID=56858382
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620390147.0U Expired - Fee Related CN205584026U (en) | 2016-05-03 | 2016-05-03 | From positive violent change parallel operation that restores to throne |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205584026U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105915060A (en) * | 2016-05-03 | 2016-08-31 | 西安科技大学 | Forward conversion circuit with secondary winding magnetic reset function and reset method thereof |
-
2016
- 2016-05-03 CN CN201620390147.0U patent/CN205584026U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105915060A (en) * | 2016-05-03 | 2016-08-31 | 西安科技大学 | Forward conversion circuit with secondary winding magnetic reset function and reset method thereof |
| CN105915060B (en) * | 2016-05-03 | 2018-07-27 | 西安科技大学 | Forward conversion circuit with vice-side winding magnetic reset function and its repositioning method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160914 Termination date: 20170503 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |