CN103887973B - Reverse irrigated current is controlled to generate the method and system of power tube voltage stress - Google Patents
Reverse irrigated current is controlled to generate the method and system of power tube voltage stress Download PDFInfo
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- CN103887973B CN103887973B CN201210566919.8A CN201210566919A CN103887973B CN 103887973 B CN103887973 B CN 103887973B CN 201210566919 A CN201210566919 A CN 201210566919A CN 103887973 B CN103887973 B CN 103887973B
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Abstract
The invention discloses a kind of method and system that reverse irrigated current is controlled to generate power tube voltage stress, wherein, which includes：Pour in down a chimney threshold test device, be arranged on the secondary of DC DC power supplies, in the case of being more than predetermined current threshold in reverse irrigated current, generate the first drive signal and control is gone to pour in down a chimney control driving device；The size of power tube voltage stress when pouring in down a chimney control driving device for controlling the first power tube and the second power tube difference in state is opened or closed the reverse irrigated current to be controlled to generate.By with the present invention, when solving system generation reverse irrigated current, reverse irrigated current brings huge energy that can generate high due to voltage spikes stress on the power tube of closing, causes power tube that avalanche breakdown occurs and damages, the problem of so as to seriously affect system reliability.By the way that the first power tube and the second power tube is made to ensure that the reliability of system alternately in state is opened or closed, and then avoid power tube and be damaged.
Description
Technical field
The present invention relates to communication and field of power electronics, and power tube is generated in particular to a kind of control reverse irrigated current
The method and system of voltage stress.
Background technology
Shown in FIG. 1 is DC-DC（Direct Current-Direct Current, referred to as DC-DC）Power supply,
Wherein, it is illustrated that left side be the power supply primary side input terminal, it is illustrated that right side be the power supply secondary output terminal.It is fast in input voltage
In the case that speed is fallen, the energy of secondary output terminal can be poured in down a chimney to primary side, due to Voltage Drop, the driving of chip be controlled to close
Disconnected, secondary synchronous rectifier is not opened, and inductive current freewheeling path disappears.Since inductive current cannot be mutated, stored on inductance
Energy and the due to voltage spikes stress that is converted on power tube of energy of output capacitance storage dissipate.Particularly in no-load condition
Under, it is huge to pour in down a chimney energy high spike stress is generated on power tube, cause power tube that avalanche breakdown occurs when serious
And damage, greatly influence the reliability of system.
Invention content
The present invention provides a kind of method and system that reverse irrigated current is controlled to generate power tube voltage stress, at least to solve
In the relevant technologies, when the secondary output terminal of DC-DC power source generates reverse irrigated current, reverse irrigated current brings huge energy can be in power
High due to voltage spikes stress is generated on pipe, causes power tube that avalanche breakdown occurs and damages, seriously affects the reliability of system
The problem of.
According to an aspect of the invention, there is provided a kind of system that reverse irrigated current is controlled to generate power tube voltage stress,
Including：Pour in down a chimney threshold test device, be arranged on the secondary of DC-DC power source, for being more than predetermined current threshold in reverse irrigated current
In the case of, it generates the first drive signal and driving is gone to pour in down a chimney control driving device；It is described to pour in down a chimney control driving device, with the DC-
First power transistor driver of the secondary of DC power supply and the connection of the second power transistor driver, for controlling the first power tube and second
The size of power tube voltage stress during power tube difference in state is opened or closed the reverse irrigated current to be controlled to generate.
Preferably, the system also includes：Described to pour in down a chimney threshold test device, it is more than institute to be additionally operable in the reverse irrigated current
In the case of stating predetermined current threshold, generate the second drive signal and driving is gone to pour in down a chimney energy bleeder；The energy that pours in down a chimney is let out
Device is put, for releasing according to second drive signal to the reverse irrigated current.
Preferably, the connection relation for pouring in down a chimney energy bleeder includes at least one below：The energy that pours in down a chimney is let out
The reverse irrigated current output terminal for putting device and the first inductance and the low level end for exporting lateral capacitance are connect, wherein, first inductance
It is arranged on the high level end of the output lateral capacitance；It is described to pour in down a chimney energy bleeder and the reverse irrigated current of first inductance is defeated
The high level end for entering end with the output lateral capacitance connects, wherein, it is described to be arranged on the output lateral capacitance with the first inductance
Low level end；The energy bleeder that pours in down a chimney is connect with the both ends of the second inductance, wherein, second inductance is and described the
The inductance of one inductance mutual inductance.
Preferably, the energy bleeder that pours in down a chimney includes：Driver, switch of releasing, resistance, wherein, the driver
With the switch connection of releasing, the resistance described pours in down a chimney energy bleeder for protecting.
Preferably, the switch of releasing includes at least one below：Metal oxide layer-semiconductor-field-effect transistor
（Metal-Oxide-Semiconductor Field-Effect Transistor, referred to as MOSFET or metal-oxide-semiconductor）, three poles
Pipe, electric-controlled switch.
Preferably, the energy bleeder that pours in down a chimney includes：Power transistor driver, metal-oxide-semiconductor, resistance, wherein, the power
Pipe driver is connect with the grid of the metal-oxide-semiconductor, and the resistance is connected with the source electrode of the third power tube or drain electrode.
Preferably, the control driving device of pouring in down a chimney includes one below：The impulse generator of two-way misphase, microcontroller,
Digital power controller, integrated circuit.
Preferably, it is described to pour in down a chimney threshold test device, it is additionally operable to be restored to less than or equal to described in the reverse irrigated current
In the case of predetermined current threshold, generate stop signal and go to pour in down a chimney control driving device described in driving and/or described pour in down a chimney energy
Bleeder is stopped.
Preferably, the system is applied in DC-DC power source of the secondary using synchronous rectification mode.
According to an aspect of the invention, there is provided a kind of method that reverse irrigated current is controlled to generate power tube voltage stress,
Including：Detect whether reverse irrigated current is more than predetermined current threshold；If it is, send drive signal with control the first power tube and
In state is opened or closed to control the big of power tube voltage stress that the reverse irrigated current generates during the second power tube difference
It is small.
Preferably, it is in when sending drive signal to control the first power tube and the second power tube difference and opens or closes shape
State is included with the size of power tube voltage stress that the reverse irrigated current is controlled to generate：It is more than described default in the reverse irrigated current
In the case of current threshold, generate the drive signal, wherein, the drive signal for control the first power transistor driver and
Second power transistor driver；First power tube and second power tube is controlled alternately to be according to the drive signal
State is opened or closed to balance the reverse irrigated current stress of first power tube and second power tube and described pour in down a chimney electricity
The size of the raw power tube voltage stress of miscarriage.
Preferably, it is further included in detection reverse irrigated current whether more than after predetermined current threshold：Surpass in the reverse irrigated current
In the case of crossing the predetermined current threshold, the reverse irrigated current is discharged by pouring in down a chimney energy bleeder, wherein, it is described to pour in down a chimney
Energy bleeder is used to release to the reverse irrigated current.
Preferably, the method further includes：It is restored in the reverse irrigated current less than or equal to the predetermined current threshold
In the case of, stop signal is generated with the size of the power tube voltage stress for the reverse irrigated current generation of removing controls.
Preferably, the method is applied in DC-DC power source of the secondary using synchronous rectification mode.
Present invention employs pour in down a chimney threshold test device to go the relationship of detection reverse irrigated current and predetermined current threshold, and falling
In the case that sink current is more than predetermined current threshold, pours in down a chimney control driving device described in driving and remove control the first power tube and second
In state is opened or closed during power tube difference, to control the release of the reverse irrigated current, alleviate release strength.Pass through utilization
The present embodiment, when the secondary output terminal for solving DC-DC power source generates reverse irrigated current, reverse irrigated current brings huge energy can be
High due to voltage spikes stress is generated on power tube, causes power tube that avalanche breakdown occurs and damages, seriously affect system can
The problem of by property, by the way that the first power tube and the second power tube is made alternately to be in and open or close state, and then avoid power
Pipe is damaged, and ensure that the reliability of system.
Description of the drawings
Attached drawing described herein is used to provide further understanding of the present invention, and forms the part of the application, this hair
Bright illustrative embodiments and their description do not constitute improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is the schematic diagram flowed to according to the circuit and reverse irrigated current of the DC-DC power source of the relevant technologies；
Fig. 2 is the structure diagram for the system that control reverse irrigated current according to embodiments of the present invention generates power tube voltage stress
One；
Fig. 3 is the structure diagram for the system that control reverse irrigated current according to embodiments of the present invention generates power tube voltage stress
Two；
Fig. 4 is the flow chart for the method that control reverse irrigated current according to embodiments of the present invention generates power tube voltage stress
One；
Fig. 5 is the flow chart for the method that control reverse irrigated current according to embodiments of the present invention generates power tube voltage stress
Two；
Fig. 6 is the circuit for the system that inhibition reverse irrigated current according to the preferred embodiment of the invention generates power tube voltage stress
Schematic diagram；
Fig. 7 is that the signal according to the preferred embodiment of the invention for pouring in down a chimney threshold test device flows to schematic diagram；
Fig. 8 is the signal flow direction according to the preferred embodiment of the invention for pouring in down a chimney energy bleeder and structure diagram；
Fig. 9 is that the signal according to the preferred embodiment of the invention for pouring in down a chimney control driving device flows to schematic diagram；
Figure 10 is the intention one according to the preferred embodiment of the invention poured in down a chimney energy bleeder connecting node and shown；
Figure 11 is the schematic diagram two according to the preferred embodiment of the invention for pouring in down a chimney energy bleeder connecting node；
Figure 12 is the signal graph that two drivers according to the preferred embodiment of the invention are alternately opened.
Specific embodiment
Come that the present invention will be described in detail below with reference to attached drawing and in conjunction with the embodiments.It should be noted that do not conflicting
In the case of, the feature in embodiment and embodiment in the application can be combined with each other.
When secondary output terminal based on DC-DC power source in the relevant technologies generates reverse irrigated current, reverse irrigated current brings huge
Energy can generate high due to voltage spikes stress on power tube, cause power tube that avalanche breakdown occurs and damages, seriously affect
The problem of reliability of system, present embodiments provides a kind of system that reverse irrigated current is controlled to generate power tube voltage stress, should
The structure diagram of system as shown in Fig. 2, including：
Pour in down a chimney threshold test device 10, be arranged on the secondary of DC-DC circuit, for being more than predetermined current threshold in reverse irrigated current
In the case of value, generate the first drive signal and driving is gone to pour in down a chimney control driving device；
Pour in down a chimney control driving device 20, driven with the first power transistor driver 1 of the secondary of DC-DC circuit and the second power tube
Dynamic device 2 connects, and is poured in down a chimney with controlling in opening or closing state during for controlling the first power tube 3 and different the second power tube 4
The size for the power tube voltage stress that electric current generates.
The present embodiment, which employs, pours in down a chimney the relationship that threshold test device 10 removes detection reverse irrigated current and predetermined current threshold, and
In the case where reverse irrigated current is more than predetermined current threshold, driving pours in down a chimney control driving device 20 and goes control 3 He of the first power tube
In state is opened or closed when second power tube 4 is different, to control the intensity of the power tube voltage stress of reverse irrigated current generation,
Alleviate release strength.By using the present embodiment, when the secondary output terminal for solving DC-DC power source generates reverse irrigated current, if
Power tube is closed by force, and reverse irrigated current brings huge energy that can generate high due to voltage spikes stress on power tube, causes
Power tube occurs avalanche breakdown and damages；If kept, power tube is normally opened, and power tube will bear larger current stress, this two
The problem of kind measure can all seriously affect system reliability.By making the first power tube 3 and the second power tube 4 alternately in opening
Or closed state, and then avoid power tube and be damaged, it ensure that the reliability of system.
In setting, above-mentioned pouring in down a chimney controls driving device 20 that can realize in many ways, for example, the arteries and veins of two-way misphase
Rush generator, microcontroller, digital power controller, integrated circuit etc..
As shown in Figure 1, by controlling the first power tube 3（It may also be referred to as the first synchronous rectifier）With the second power tube 4
（It may also be referred to as the second synchronous rectifier）To prevent power tube from avalanche breakdown occurs and damage a kind of mode of realization, in order into
One step reduces power tube and is risk of damage to, and in a preferred embodiment, above device can be with as shown in figure 3, further include
Pour in down a chimney energy bleeder 30, wherein, pour in down a chimney threshold test device 20, be additionally operable to the situation more than predetermined threshold value in reverse irrigated current
Under, it generates the second drive signal and driving is gone to pour in down a chimney energy bleeder；Pour in down a chimney energy bleeder 30, for according to the second driving
Signal releases to reverse irrigated current.
When energy bleeder 30 is poured in down a chimney in setting, pouring in down a chimney for energy bleeder 30 and the first inductance 5 can will be poured in down a chimney
Current output terminal（C points）With the low level end of output lateral capacitance 6（D points）Connection, the energy that pours in down a chimney connected by this way are released
Device 30 can release reverse irrigated current from secondary circuit, and then reduce the powerful energy that reverse irrigated current generates, and then reduce
The power tube voltage stress that reverse irrigated current generates.Preferably, it can also will pour in down a chimney 30 and second inductance of energy bleeder two
End connection, wherein, the second inductance is the inductance with 5 mutual inductance of the first inductance, is attached by such mode and poured in down a chimney to release
Electric current can reduce the powerful energy of reverse irrigated current generation by way of mutual inductance.
Pouring in down a chimney energy bleeder 30 can be realized by way of circuit, for example, this pour in down a chimney energy bleeder 30 can
To include conversion driver, switch of releasing, resistance, wherein, for controlling switch of releasing, the resistance is used for the conversion driver
It is in a safe condition to pour in down a chimney energy bleeder described in protection.Wherein, switch of releasing can include it is a variety of, for example, metal-oxide-semiconductor, three
Pole pipe, electric-controlled switch etc., but it is not limited to this.
When above-mentioned switch of releasing is metal-oxide-semiconductor, then driver is power transistor driver, the power transistor driver and metal-oxide-semiconductor
Grid connection, resistance can arbitrarily be arranged on the high level output side of power tube or low level output side.
After adjusting by the system of above-mentioned control reverse irrigated current, reverse irrigated current is restored to less than or equal to predetermined threshold value
When, pour in down a chimney threshold test device 10 and generate stop signal driving is gone to pour in down a chimney control driving device 20 and/or pour in down a chimney energy and release dress
30 are put to be stopped.
The present embodiment additionally provides a kind of method that reverse irrigated current is controlled to generate power tube voltage stress, and this method can fit
For the system of above-mentioned control reverse irrigated current, the flow of this method can be with as shown in figure 4, including step S402 to step S404.
Whether step S402, detection reverse irrigated current are more than predetermined current threshold；
Step S404, if it is, sending drive signal to be in when controlling the first power tube and the second power tube difference
The size of power tube voltage stress that state is opened or closed so that reverse irrigated current to be controlled to generate.
In implementation process, step S404 may further include following process：It is more than predetermined current threshold in reverse irrigated current
In the case of value, drive signal is generated, wherein, drive signal is for the first power transistor driver of control and the driving of the second power tube
Device；It is alternately according to drive signal the first power tube of control and the second power tube and opens or closes state to balance the first work(
Rate pipe and the current stress of the second power tube and due to voltage spikes stress.In a preferred embodiment, the above process can also be such as
Shown in Fig. 5, further include step S406, i.e., it, can also be by pouring in down a chimney energy in the case where reverse irrigated current is more than predetermined current threshold
Measure bleeder release reverse irrigated current.
By the adjustment of the above method, when reverse irrigated current is restored to less than or equal to predetermined current threshold, stopping is generated
Signal is with the release for reverse irrigated current of removing controls, then the power tube of secondary output terminal at this time is breakdown and the danger damaged
Danger.
The diagram for the secondary mentioned in above-described embodiment be full-wave rectification diagram, certainly can also include full-bridge rectification,
Times stream rectification, the forms such as mixed-rectification, as long as its secondary, which is synchronous rectification, can use the above method, people in the art
Member can be designed according to actual conditions.With reference to preferred embodiment, the present invention will be described.
Preferred embodiment
This preferred embodiment is related to the method and system that reverse irrigated current is inhibited to generate power tube voltage stress, and this method passes through
Reverse irrigated current is generated to system to be controlled and released, and reverse irrigated current is inhibited to generate power tube voltage stress.This method is mainly right
It is controlled in DC-DC power source since input voltage falls rapidly the reverse irrigated current generated, reverse irrigated current to be inhibited to exist
The due to voltage spikes stress generated on power tube.
The circuit diagram of system that the present embodiment proposed inhibit reverse irrigated current to generate power tube voltage stress can be as
Shown in Fig. 6, following components can be included：Pour in down a chimney threshold test device, pour in down a chimney control driving device and pour in down a chimney energy and release
Device.Wherein, pour in down a chimney the triggering of threshold test device detection system reverse irrigated current to pour in down a chimney energy bleeder and pour in down a chimney control driving
The threshold condition of device beginning and end work；Pour in down a chimney energy bleeder and include a driver, a resistance and a work(
Rate pipe；Pour in down a chimney control driving device and generate pulsed drive, to control being switched on and off for power tube.
Circuit provided in this embodiment is simple, effectively, and it is at low cost.Next this preferred embodiment will be carried with reference to attached drawing
The above system of confession is illustrated, and is illustrated for the implementation method of the system.
The operation principle of the present embodiment is：When system pours in down a chimney generation, former secondary drive signal has disappeared at this time.Fig. 7
The shown electric current that threshold test device detects that system pours in down a chimney generation that pours in down a chimney is more than preset threshold condition, pours in down a chimney threshold value from this
The right side and left side difference output signal of detection device will pour in down a chimney commencing signal and send the energy shown in Fig. 8 that pours in down a chimney to and releases dress
It puts and pours in down a chimney control driving device with shown in Fig. 9.
Pour in down a chimney commencing signal to reach pour in down a chimney energy bleeder when, can be released by a variety of methods, for example, such as
Shown in Fig. 8, pour in down a chimney energy bleeder and receive and pour in down a chimney commencing signal, high level is exported by inner drive, by power tube
It opens, a part is poured in down a chimney into energy and is released by resistance and power tube, while resistance plays metering function, will also pour in down a chimney energy
Resistance is gradually passed through to dissipate in the form of heat.Two terminals of the A and B for pouring in down a chimney energy bleeder shown in Fig. 8 can be with
It is connected to outputting inductance front end C points and D points（As shown in Figure 10）Or the E points of coupling inductance are connected to by inductive coupling
With F points（As shown in figure 11）.Certainly, above-mentioned realization method is all a kind of preferred embodiment, can be according to actual conditions
Carry out different settings.
At the same time, pour in down a chimney commencing signal to reach pour in down a chimney control driving device when, as shown in figure 9, to secondary power tube
Driver Driver5, Driver6 for, the normal driving of drive control device has been switched off at this time, pours in down a chimney control driving device
Two-way misphase formula pulsed drive is exported, two-way power tube is alternately opened, help pours in down a chimney what energy bleeder was not released completely
Energy, which leads to, is transmitted to input terminal, wherein, the signal graph that Driver5 and Driver6 are alternately opened is shown in Fig.12.Output two
The implementation of road misphase formula pulsed drive can be controlled by the impulse generator, microcontroller, digital power of two-way misphase to be believed
Number or application-specific integrated circuit generate.The frequency and duty ratio of misphase formula pulsed drive can be set by circuit and be adjusted.It hands over
For open power tube, current stress is shared, and if power tube is normally opened at this time, power tube will bear larger electric current
Stress；Power tube often closes, then larger due to voltage spikes stress can bring power tube impact.Pulsed drive then balances power tube
Current stress and due to voltage spikes stress.
Detect that system pours in down a chimney energy to some threshold value when pouring in down a chimney threshold test device, it is believed that pour in down a chimney disappearance or be relieved to
To a certain degree, it when the risk that success rate tip peak stress is exceeded and generation damages will not be reproduced by pouring in down a chimney energy, is let out to energy is poured in down a chimney
It puts device and pours in down a chimney control driving device and send out cut-off signals, stop its work, system restores normal condition.
Energy is poured in down a chimney in the energy bleeder part that can release of pouring in down a chimney of the present embodiment, make to flow through the energy of power tube compared with
It is small, it can inhibit to pour in down a chimney the due to voltage spikes stress that energy generates on power tube in this way.At the same time, misphase formula pulsed drive is in energy
Amount dredge it is stifled between carry out alternately switching, the effect for inhibiting voltage stress is also produced while power down stream energy is released.
It can be seen from the above description that the present invention realizes following technique effect：
The embodiment of the present invention can be shunted to pouring in down a chimney energy, make to flow through power tube to pour in down a chimney energy smaller, it is suppressed that
Voltage stress on power tube；The voltage stress and electric current that balance power tube can also be taken into account by misphase formula pulsed drive should
Power makes system operational security reliable, and circuit is realized simply, of low cost.
Obviously, those skilled in the art should be understood that each module of the above-mentioned present invention or each step can be with general
Computing device realize that they can concentrate on single computing device or be distributed in multiple computing devices and be formed
Network on, optionally, they can be realized with the program code that computing device can perform, it is thus possible to which they are stored
It is performed in the storage device by computing device, and in some cases, it can be to be different from shown in sequence herein performs
The step of going out or describing they are either fabricated to each integrated circuit modules respectively or by multiple modules in them or
Step is fabricated to single integrated circuit module to realize.It to be combined in this way, the present invention is not limited to any specific hardware and softwares.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, that is made any repaiies
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (11)
1. a kind of system that reverse irrigated current is controlled to generate power tube voltage stress, which is characterized in that including：
Pour in down a chimney threshold test device, be arranged on the secondary of DC-DC power, for being more than predetermined current threshold in reverse irrigated current
In the case of, it generates the first drive signal and driving is gone to pour in down a chimney control driving device；
It is described to pour in down a chimney control driving device, the first power transistor driver and the second work(with the secondary of the DC-DC power
Rate pipe driver connects, and state is opened or closed to control for being in when the first power tube of control and the second power tube difference
State the size of the power tube voltage stress of reverse irrigated current generation；
The system also includes：Described to pour in down a chimney threshold test device, it is more than the predetermined current to be additionally operable in the reverse irrigated current
In the case of threshold value, generate the second drive signal and driving is gone to pour in down a chimney energy bleeder；
It is described to pour in down a chimney energy bleeder, for being released according to second drive signal to the reverse irrigated current；
Wherein, the connection relation for pouring in down a chimney energy bleeder includes at least one below：
The low level end of the reverse irrigated current output terminal for pouring in down a chimney energy bleeder and the first inductance and output lateral capacitance is connect,
Wherein, first inductance is arranged on the high level end of the output lateral capacitance；
The height electricity of the reverse irrigated current input terminal for pouring in down a chimney energy bleeder and first inductance and the output lateral capacitance
Flush end connects, wherein, first inductance is arranged on the low level end of the output lateral capacitance；
The energy bleeder that pours in down a chimney is connect with the both ends of the second inductance, wherein, second inductance has a mutual coupling inductance.
2. system according to claim 1, which is characterized in that the energy bleeder that pours in down a chimney includes：Driver is released
Switch, first resistor, wherein, the driver is used to protect described pour in down a chimney with the switch connection of releasing, the first resistor
Energy bleeder.
3. system according to claim 2, which is characterized in that the switch of releasing includes at least one below：Metal-oxygen
Change layer-semiconductor-field effect transistor M OS pipes, triode, electric-controlled switch.
4. system according to claim 3, which is characterized in that the energy bleeder that pours in down a chimney further includes：Second resistance,
Wherein, the driver is connect with the grid of the metal-oxide-semiconductor, and the second resistance is connected with the source electrode of the metal-oxide-semiconductor or drain electrode.
5. system according to claim 1, which is characterized in that the control driving device of pouring in down a chimney includes one below：
The impulse generator of two-way misphase, microcontroller, digital power controller, integrated circuit.
6. system according to any one of claim 2 to 4, which is characterized in that
It is described to pour in down a chimney threshold test device, it is additionally operable to be restored to less than or equal to the predetermined current threshold in the reverse irrigated current
In the case of, generation stop signal goes to pour in down a chimney control driving device described in driving and/or the energy bleeder that pours in down a chimney stops
Work.
7. system according to any one of claim 1 to 5, which is characterized in that the system is applied in secondary using same
In the DC-DC power for walking rectifier system.
A kind of 8. method that reverse irrigated current is controlled to generate power tube voltage stress, which is characterized in that including：
Detect whether reverse irrigated current is more than predetermined current threshold；
State is opened or closed if it is, being in when sending drive signal to control the first power tube and the second power tube difference
With the size of power tube voltage stress that the reverse irrigated current is controlled to generate；
In detection reverse irrigated current whether more than after predetermined current threshold, further include：It is more than described default in the reverse irrigated current
In the case of current threshold, the reverse irrigated current is discharged by pouring in down a chimney energy bleeder, wherein, the energy that pours in down a chimney is released dress
It puts to release to the reverse irrigated current；
Wherein, the connection relation for pouring in down a chimney energy bleeder includes at least one below：
The low level end of the reverse irrigated current output terminal for pouring in down a chimney energy bleeder and the first inductance and output lateral capacitance is connect,
Wherein, first inductance is arranged on the high level end of the output lateral capacitance；
The height electricity of the reverse irrigated current input terminal for pouring in down a chimney energy bleeder and first inductance and the output lateral capacitance
Flush end connects, wherein, first inductance is arranged on the low level end of the output lateral capacitance；
The energy bleeder that pours in down a chimney is connect with the both ends of the second inductance, wherein, second inductance is with mutual coupling electricity
Sense.
9. according to the method described in claim 8, it is characterized in that, drive signal is sent to control the first power tube and the second work(
Included during rate pipe difference in state is opened or closed with the size of power tube voltage stress that the reverse irrigated current is controlled to generate：
In the case where the reverse irrigated current is more than the predetermined current threshold, the drive signal is generated, wherein, the driving
Signal is for the first power transistor driver of control and the second power transistor driver；
First power tube and second power tube is controlled alternately to be in and open or close shape according to the drive signal
State is to balance the power that the reverse irrigated current stress of first power tube and second power tube and the reverse irrigated current generate
The size of tube voltage stress.
10. the method according to any one of claim 8 to 9, which is characterized in that further include：
In the case where the reverse irrigated current is restored to less than or equal to the predetermined current threshold, stop signal is generated to cancel
Control the size of power tube voltage stress that the reverse irrigated current generates.
11. the method according to any one of claim 8 to 9, which is characterized in that the method is applied in secondary using same
In the DC-DC power for walking rectifier system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210566919.8A CN103887973B (en) | 2012-12-24 | 2012-12-24 | Reverse irrigated current is controlled to generate the method and system of power tube voltage stress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210566919.8A CN103887973B (en) | 2012-12-24 | 2012-12-24 | Reverse irrigated current is controlled to generate the method and system of power tube voltage stress |
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| Publication Number | Publication Date |
|---|---|
| CN103887973A CN103887973A (en) | 2014-06-25 |
| CN103887973B true CN103887973B (en) | 2018-07-06 |
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| CN105337260A (en) * | 2014-08-13 | 2016-02-17 | 中兴通讯股份有限公司 | Backward flowing current control method, backward flowing current control circuit and power converter |
| CN106877677B (en) * | 2017-04-10 | 2020-07-03 | 深圳市永联科技股份有限公司 | Converter control circuit with bidirectional synchronous rectification and dead-zone self-regulation |
| CN109085412B (en) * | 2017-06-14 | 2021-06-08 | 圣邦微电子（北京）股份有限公司 | Reverse current detection circuit |
| CN109217241A (en) * | 2018-10-17 | 2019-01-15 | 郑州云海信息技术有限公司 | A kind of device and method for preventing reverse current from leading to overshoot voltage |
| CN111654010A (en) * | 2019-12-17 | 2020-09-11 | 联合汽车电子有限公司 | Method for preventing back-flow current |
| CN115314451B (en) * | 2022-08-23 | 2023-06-06 | 中国电子科技集团公司第十研究所 | Method for treating insufficient power-down caused by current backflow of domestic SRIO exchange chip |
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