CN209217954U - The driving circuit and converters of converters bridge architecture - Google Patents
The driving circuit and converters of converters bridge architecture Download PDFInfo
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- CN209217954U CN209217954U CN201822049226.7U CN201822049226U CN209217954U CN 209217954 U CN209217954 U CN 209217954U CN 201822049226 U CN201822049226 U CN 201822049226U CN 209217954 U CN209217954 U CN 209217954U
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- driving circuit
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Abstract
The utility model provides the driving circuit and converters of a kind of converters bridge architecture.The driving circuit includes the first driving circuit for driving the first power tube, with for driving the second driving circuit of the second power tube, PWM signal generator is coupled by isolation element with the first driving circuit and the second driving circuit, the source electrode of first power tube is connect with the drain electrode of the second power tube, the driving circuit of converters bridge architecture further includes that the gate pole residual voltage for generating the first power tube is released to safe voltage the first leadage circuit below, and the gate pole residual voltage for generating the second power tube is released to safe voltage the second leadage circuit below.A possibility that the utility model generates the driving stage that negative level is superimposed upon shutdown pipe by using Zener, diode etc. in conjunction with driving transformer, reduces gate voltage spike level, reduces false triggering, increases the reliability of driving circuit.
Description
Technical field
The utility model relates to Technics of Power Electronic Conversion fields, and in particular to a kind of drive of converters bridge architecture
Dynamic circuit and converters.
Background technique
In converters, main control unit issues control signal, and control power circuit realizes transformation of electrical energy.Due to master
It is weaker to control cell signal driving capability, needs by driving circuit as control circuit and power circuit interface.Modern electric electricity
Such as Vehicular charger, high-power communication power supply in sub- converting means, the power of processing is increasing, and bridge architecture is because of its change
Power is changed to be widely adopted better than other structures.
Bridge architecture is capable of handling more high-power, drives that there is also false triggering risks to it.When the conducting of upper (lower) pipe, produce
Raw voltage change cause under (on) junction capacitance voltage change, form electric current, the electric current and parasitic inductance drive resistance phase interaction
With due to voltage spikes can be generated.The due to voltage spikes causes down tube straight-through, causes input source short-circuit, converting means damage.To avoid
Straight-through phenomenon occurs, and in addition to requiring control signal to add dead zone, complementary pipe driving signal generally requires superposition negative electricity in low level
Pressure avoids false triggering to improve driving anti-interference.
Common bridge drive circuit is broadly divided into two kinds: building circuit drives using separating component；Using dedicated drive
Dynamic chip drives.It is driven using driving chip, negative pressure can be generated when power tube shutdown, anti-interference relatively strong, reliable performance, but deposit
In disadvantage that is expensive, and needing additional auxiliary supply source power supply.It is relatively simple that separating component builds driving circuit structure, but
It only provides driving capability enlarging function, that is, generate high level when opening, when shutdown generates low level, and when shutdown has no negative pressure
It is added on power tube gate pole, jamproof performance is weaker, and reliability is weaker.
It is therefore desirable to provide a kind of to have the characteristics that structure is simple, driving of reliable performance, bridge architecture low in cost
Circuit makes electronic product with more the market competitiveness, becomes problem anxious to be resolved.
Utility model content
The utility model provides the driving circuit and converters of a kind of converters bridge architecture,
To solve the problems, such as to exist in the prior art false triggering risk.
To solve the above problems, the one aspect as the utility model, provides a kind of converters bridge-type
The driving circuit of structure, including it is PWM signal generator, isolation element, the first power tube, the second power tube, described for driving
First driving circuit of the first power tube and the second driving circuit for driving second power tube, the pwm signal hair
Raw device is coupled by the isolation element with first driving circuit and the second driving circuit, the source electrode of first power tube
It is connect with the drain electrode of second power tube, which is characterized in that the driving circuit of the converters bridge architecture is also
Including the gate pole residual voltage for generating first power tube release to safe voltage the first leadage circuit below, with
And the gate pole residual voltage for generating second power tube is released to safe voltage the second leadage circuit below, it is described
First leadage circuit is electrically connected with first driving circuit, and second leadage circuit is electrically connected with second driving circuit
It connects.
Preferably, first driving circuit is identical as second driving circuit, first leadage circuit with it is described
Second leadage circuit is identical.
Preferably, the isolation element is isolation drive transformer.
Preferably, first power tube include first open diode, second open diode, driving resistance, gate pole
Resistance, the first discharge diode and the second discharge diode, the first end of the first secondary windings of the isolation drive transformer
Pass sequentially through described first open diode, second open diode, driving resistance, gate electrode resistance and the first secondary windings the
The connection of two ends, the both ends of the gate electrode resistance are connect with the gate pole of first power tube and source electrode correspondingly respectively, institute
State one end that second opens diode connect with the emitter of first discharge diode, the other end and it is described first electric discharge three
The base stage of pole pipe connects, and the collector of first discharge diode passes through first resistor and the second of first secondary windings
End connection, the one end of the driving resistance connecting with the gate electrode resistance and the collector of second discharge diode connect
It connects, the base stage of second discharge diode is connect with the collector of first discharge diode, second electric discharge, three poles
The emitter of pipe is connect with the second end of first secondary windings.
Preferably, first leadage circuit includes Zener diode and negative pressure clamp diode, and described first opens two
The one end of pole pipe connecting with the first end of first secondary windings passes sequentially through the Zener diode, two pole of negative pressure clamper
It manages and is connected with the one end of the driving resistance being connect with the gate electrode resistance.
Preferably, the base stage of first discharge diode passes through the second end of second resistance and first secondary windings
Connection.
Preferably, the one end of the driving resistance connecting with the gate electrode resistance is put by 3rd resistor with described second
The collector of electric triode connects.
The utility model additionally provides a kind of converters, including above-mentioned converters bridge architecture
Driving circuit.
The utility model generates the drive that negative level is superimposed upon shutdown pipe by using Zener etc. in conjunction with driving transformer
A possibility that moving pole, reducing false triggering.The utility model builds circuit using discrete component, not only structure it is simple, at
This is cheap, and greatly improves the reliability of driving circuit in the prior art.
Detailed description of the invention
Fig. 1 schematically shows the bridge drive circuit schematic diagram of the utility model；
Fig. 2 schematically shows the bridge drive circuit upper tubes of the utility model to open schematic diagram；
Fig. 3 schematically shows down tube on the bridge drive circuit of the utility model and simultaneously turns off schematic diagram；
Fig. 4 schematically shows the bridge drive circuit down tubes of the utility model to open schematic diagram.
Appended drawing reference in figure: 1, PWM signal generator；2, isolation element；3, the first power tube；4, the second power tube；5,
First opens diode；6, second diode is opened；7, resistance is driven；8, gate electrode resistance；9, the first discharge diode；10,
Two discharge diodes；11, first resistor；12, Zener diode；13, negative pressure clamp diode；14, second resistance；15, third
Resistance.
Specific embodiment
The embodiments of the present invention are described in detail below in conjunction with attached drawing, but the utility model can be by right
It is required that the multitude of different ways for limiting and covering is implemented.
The purpose of the utility model is to provide a kind of reliable performances, bridge drive circuit of simple structure and low cost, i.e.,
It builds to be capable of providing using separating component and generates high level when opening, negative pressure is generated when shutdown to enhance anti-interference ability
Driving circuit.
The one aspect of the utility model provides a kind of driving circuit of converters bridge architecture, including
PWM signal generator 1, isolation element 2, the first power tube 3, the second power tube 4, for driving first power tube 3
One drive circuit and the second driving circuit for driving second power tube 4, the PWM signal generator 1 pass through described
Isolation element 2 is coupled with first driving circuit and the second driving circuit, the source electrode of first power tube 3 and described second
The drain electrode of power tube 4 connects, which is characterized in that the driving circuit of the converters bridge architecture further includes for inciting somebody to action
The gate pole residual voltage that first power tube 3 generates releases to safe voltage the first leadage circuit below and for inciting somebody to action
The gate pole residual voltage that second power tube 4 generates, which is released to safe voltage the second leadage circuit below, described first, to be let out
Electric discharge road is electrically connected with first driving circuit, and second leadage circuit is electrically connected with second driving circuit.
Preferably, first driving circuit is identical as second driving circuit, first leadage circuit with it is described
Second leadage circuit is identical.
Preferably, the isolation element 2 is isolation drive transformer.
Preferably, first power tube 3 include first open diode 5, second open diode 6, driving resistance 7,
Gate electrode resistance 8, the first discharge diode 9 and the second discharge diode 10, the first secondary windings of the isolation drive transformer
First end pass sequentially through described first open diode 5, second open diode 6, driving resistance 7, gate electrode resistance 8 and first
The second end of secondary windings connects, the both ends of the gate electrode resistance 8 respectively with the gate pole of first power tube 3 and source electrode one by one
Correspondingly connected, described second one end for opening diode 6 connect with the emitter of first discharge diode 9, the other end
It is connect with the base stage of first discharge diode 9, the collector of first discharge diode 9 passes through first resistor 11 and institute
State the second end connection of the first secondary windings, one end connecting with the gate electrode resistance 8 and described second of the driving resistance 7
The collector of discharge diode 10 connects, the collection of the base stage of second discharge diode 10 and first discharge diode 9
Electrode connection, the emitter of second discharge diode 10 are connect with the second end of first secondary windings.
Preferably, first leadage circuit includes Zener diode 12 and negative pressure clamp diode 13, and described first opens
The one end of logical diode 5 connecting with the first end of first secondary windings passes sequentially through the Zener diode 12, negative pressure
Clamp diode 13 is connected with the one end of the driving resistance 7 connecting with the gate electrode resistance 8.
Preferably, the base stage of first discharge diode 9 pass through second resistance 14 and first secondary windings the
The connection of two ends.
Preferably, the one end of the driving resistance 7 connect with the gate electrode resistance 8 passes through 3rd resistor 15 and described the
The collector of two discharge diodes 10 connects.
The utility model additionally provides a kind of converters, for example, phase-shifted full-bridge converter, LLC converter and
Half-bridge converter etc., the driving circuit including above-mentioned converters bridge architecture.
In the following, being carried out to the working process and principle of the utility model as described below.
Such as Fig. 2, when bridge drive circuit upper tube in the present invention is opened, PWM_H is high level, and PWM_L is low
Driving signal is reached power tube driving by isolation element 2, is added high level by circuit shown in arrow in Fig. 2 by level
It is loaded onto the gate pole of the first power tube 3, then the first power tube 3 is connected.Meanwhile negative voltage being loaded onto the door of the second power tube 4
The negative pressure clamper shutdown of the second power tube 4 is realized in pole.
Such as Fig. 3, on bridge drive circuit in the present invention when down tube shutdown, PWM_H is low level, and PWM_L is
Low level, no driving signal reach power tube through isolation element 2 and drive, and circuit shown in dotted lines in Figure 3 forces Q11, Q12 to be connected
Q1 gate pole residual voltage is released to safe voltage hereinafter, same R23, R24, R21, R22, R2g force the first discharge diode
9, the second discharge diode 10 is connected, to releasing the gate pole residual voltage of the first power tube 3 and the second power tube 4 to safety
Voltage is hereinafter, the first power tube 3 and the second power tube 4 are turned off at this time.
As shown in figure 4, PWM_H is low level when bridge drive circuit down tube is opened, PWM_L is high level, by every
Driving signal is reached into power tube driving from element 2.High level is loaded onto the second function by the second driving circuit of the second power tube 4
The gate pole of rate pipe 4, the conducting of the second power tube 4.And negative voltage is loaded onto first by the first driving circuit of the first discharge diode 9
The gate pole of power tube 3 realizes the shutdown of 3 negative pressure clamper of the first power tube.Due to the presence of the first leadage circuit, so that the second power
When pipe 4 is connected, under the cooperation of upper winding, a upper negative level is generated, the both ends GS of the first power tube 3 are added in, to be formed
Stable negative pressure judgement, therefore the first power tube 3 does not turn on, that is, eliminates the risk of false triggering.
The utility model generates the drive that negative level is superimposed upon shutdown pipe by using Zener etc. in conjunction with driving transformer
A possibility that moving pole, reducing false triggering.The utility model builds circuit using discrete component, not only structure it is simple, at
This is cheap, and greatly improves the reliability of driving circuit in the prior art.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (8)
1. a kind of driving circuit of converters bridge architecture, including PWM signal generator (1), isolation element (2),
First power tube (3), the second power tube (4), the first driving circuit for driving first power tube (3) and for driving
The second driving circuit of second power tube (4) is moved, the PWM signal generator (1) passes through the isolation element (2) and institute
State the first driving circuit and the coupling of the second driving circuit, the source electrode of first power tube (3) and second power tube (4)
Drain electrode connection, which is characterized in that the driving circuit of the converters bridge architecture further includes being used for described first
The gate pole residual voltage that power tube (3) generates is released to safe voltage the first leadage circuit below and for by described the
The gate pole residual voltage that two power tubes (4) generate is released to safe voltage the second leadage circuit below, first vent discharge
Road is electrically connected with first driving circuit, and second leadage circuit is electrically connected with second driving circuit.
2. the driving circuit of converters bridge architecture according to claim 1, which is characterized in that described first
Driving circuit is identical as second driving circuit, and first leadage circuit is identical as second leadage circuit.
3. the driving circuit of converters bridge architecture according to claim 2, which is characterized in that the isolation
Element (2) is isolation drive transformer.
4. the driving circuit of converters bridge architecture according to claim 3, which is characterized in that described first
Power tube (3) include first open diode (5), second open diode (6), driving resistance (7), gate electrode resistance (8), first
Discharge diode (9) and the second discharge diode (10), the first end of the first secondary windings of the isolation drive transformer according to
It is secondary by described first open diode (5), second open diode (6), driving resistance (7), gate electrode resistance (8) and for the first time
The second end connection of grade winding, the both ends of the gate electrode resistance (8) gate pole and source electrode one with first power tube (3) respectively
One is correspondingly connected, described second one end for opening diode (6) connect with the emitter of first discharge diode (9),
The other end is connect with the base stage of first discharge diode (9), and the collector of first discharge diode (9) passes through first
Resistance (11) is connect with the second end of first secondary windings, and driving resistance (7) connect with the gate electrode resistance (8)
One end connect with the collector of second discharge diode (10), the base stage of second discharge diode (10) with it is described
The collector of first discharge diode (9) connects, the emitter of second discharge diode (10) and first grade around
The second end connection of group.
5. the driving circuit of converters bridge architecture according to claim 4, which is characterized in that described first
Leadage circuit includes Zener diode (12) and negative pressure clamp diode (13), described first open diode (5) with it is described
First secondary windings first end connection one end pass sequentially through the Zener diode (12), negative pressure clamp diode (13) with
One end connection of driving resistance (7) being connect with the gate electrode resistance (8).
6. the driving circuit of converters bridge architecture according to claim 4, which is characterized in that described first
The base stage of discharge diode (9) is connect by second resistance (14) with the second end of first secondary windings.
7. the driving circuit of converters bridge architecture according to claim 4, which is characterized in that the driving
The one end of resistance (7) connecting with the gate electrode resistance (8) passes through 3rd resistor (15) and second discharge diode (10)
Collector connection.
8. a kind of converters, which is characterized in that become including power electronics described in any one of claims 1 to 7
The driving circuit of parallel operation bridge architecture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822049226.7U CN209217954U (en) | 2018-12-06 | 2018-12-06 | The driving circuit and converters of converters bridge architecture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822049226.7U CN209217954U (en) | 2018-12-06 | 2018-12-06 | The driving circuit and converters of converters bridge architecture |
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| Publication Number | Publication Date |
|---|---|
| CN209217954U true CN209217954U (en) | 2019-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201822049226.7U Active CN209217954U (en) | 2018-12-06 | 2018-12-06 | The driving circuit and converters of converters bridge architecture |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109347332A (en) * | 2018-12-06 | 2019-02-15 | 深圳威迈斯电源有限公司 | The driving circuit and converters of converters bridge architecture |
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2018
- 2018-12-06 CN CN201822049226.7U patent/CN209217954U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109347332A (en) * | 2018-12-06 | 2019-02-15 | 深圳威迈斯电源有限公司 | The driving circuit and converters of converters bridge architecture |
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