CN101635503B - Protective method for improving operational reliability of switch power supply - Google Patents
Protective method for improving operational reliability of switch power supply Download PDFInfo
- Publication number
- CN101635503B CN101635503B CN2009100236757A CN200910023675A CN101635503B CN 101635503 B CN101635503 B CN 101635503B CN 2009100236757 A CN2009100236757 A CN 2009100236757A CN 200910023675 A CN200910023675 A CN 200910023675A CN 101635503 B CN101635503 B CN 101635503B
- Authority
- CN
- China
- Prior art keywords
- module
- power
- driver module
- driving
- pulse
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The invention discloses a protective method for improving the operational reliability of a switch power supply. By adding a driving reliability improvement module to a driving module and a power switching module of a bridge circuit module, the method can carry out different treatment on the following types of situations: type 1, a false driving pulse occurring before a normal driving pulse; type 2, a small bulge occurring at the edge of the normal driving pulse and lifting gradually, so that the original driving pulse is widened; and type 3, a driving pulse occurring after the normal driving pulse ends. The protective method for improving operational reliability of switch power supply is simple and practicable,and is capable of modifying the switch power supply on the basis of the common driving module and power switching module, thus greatly reducing the cost of the driving module and the power switching module of high-power and super-power switch power supplies and improving the competitiveness of products.
Description
Technical field
The present invention relates to drive part and power switch circuit module technology of dependability method in the Switching Power Supply key technology; specifically be exactly to provide the guard method of a kind of low cost and high reliability, in complex environment, work reliably to guarantee Switching Power Supply for high-power and super high power Switching Power Supply driver module and power switch circuit modular design.The present invention is applicable to the design of bridge switch power circuit.
Background technology
In the switching power circuit design, the quality of design of drive circuit plays decisive role to the reliability of Switching Power Supply.In the Switching Power Supply of middle low power output, general generally speaking driver module and power switch circuit module can guarantee that power supply works reliably.Circuit design it should be noted that and selected suitable driving power this moment.But in high power switching power supply and super high power Switching Power Supply, along with the increasing of operating current, various electromagnetic interference aggravations, whole aircraft reliability reduces gradually.A kind of situation wherein is produce the mistake driving pulse in the power module, and power model usually to be driven by the mistake driving pulse.High power switching power supply generally all needs to adopt half-bridge or full-bridge circuit structure commonly used in the switch power technology, to satisfy demanded power output.In this bridge circuit structure, the phase-shift soft switch bridge circuit is the most normal adopted in addition.Bridge circuit is in order to improve the delivery efficiency of power supply, and the design of the Dead Time of the change of current must lack as much as possible between the last underarm.Rely on to transfer pulsewidth to come the bridge circuit of control output voltage, the dead band is not fixed, and only Dead Time is only minimum when maximum output voltage.Rely on phase modulation to come the bridge circuit of control output voltage, the dead band is generally fixed, whenever, the dead band all keeps a possible minimum value.Dead Time on the brachium pontis all is very short like this; if the mistake driving pulse produces in this very short Dead Time; usually can cause that two power tubes are straight-through simultaneously up and down in the bridge circuit; cause the big capacitance short-circuit of energy storage; the short circuit of power supply primary side; power tube is blasted, and causes grid short circuit simultaneously, and is very harmful.
General driver module and power switch circuit module be issuable mistake driving pulse in high-power or super high power power supply, sums up according to applicant's actual measurement, mainly is divided into following three classes
The first kind: the mistake driving pulse that occurs before the driven pulse.See it is that the turn-on and turn-off of one of them power tube are another power tube to be caused to disturb produce due to the mistake driving pulse from producing reason, as shown in Figure 2.
Second class: little projection appears in the driven pulse front edge, and lifting gradually, and original driving pulse is widened.See it is due to big electric current works long hours from producing reason.As shown in Figure 3.
The 3rd class: the driving pulse that occurs behind the driven end-of-pulsing.The reason that produces and the mistake driving pulse of the first kind are similar.As shown in Figure 4 and Figure 5.
In addition, the method for the power tube saturation voltage drop by gathering high-power or super high power power supply brachium pontis also has shortcoming.This detection method is to realize to the saturation voltage drop of source class (or emitter) by the drain electrode (or collector electrode) that the series connection fast recovery diode detects power tube in the bridge circuit module.In the process of power tube switch.Very fast variation takes place to the pressure drop meeting of source class (or emitter) in drain electrode (or collector electrode).The wherein a pair of power tube that is operated in push pull mode of bridge circuit module powering load, in the process that one of them power tube is turn-offing, the pressure drop of another one power tube will change to rapidly about zero volt from supply voltage.Same variation also can take place in the voltage that same and power tube drain that (or collector electrode) link to each other is used to detect the diode two ends of saturation voltage drop.Because this diode has junction capacitance, make the driver module port a very significantly negative pulse occur, referring to Fig. 6, the negative pressure of this amplitude can cause the misoperation of driver module, also is to produce the mistake driving pulse, causes the major reason of power supply short circuit.
Summary of the invention
Be easy to generate the problem of mistake driving pulse during at high-power or super high power power work; the objective of the invention is to; for high-power and super high power Switching Power Supply driver module and power switch circuit modular design provide the guard method of a kind of low cost and high reliability, the reliability when improving high-power and super high power power work.The guard method that the present invention proposes mainly is based on the driver module and the power switch circuit module that are easier in the market buy and designs and transform.To reduce high-power and super high power electric power driving module and power switch circuit module change cost.
In order to realize above-mentioned task, the present invention takes following technical solution:
A kind of guard method that improves operational reliability of switch power supply, it is characterized in that, this method has increased to improve between the driver module of bridge circuit module and power switch circuit module and has driven reliability module, and this raisings driving reliability module is carried out different processing for three types common pulse;
Described three types pulse is:
The first kind: the mistake driving pulse that occurs before the driven pulse;
Second class: little projection appears in the driven pulse front edge, and lifting gradually, and original driving pulse is widened;
The 3rd class: occur new driving pulse behind the driven end-of-pulsing;
Its processing method is as follows respectively:
For the first kind, improve the driving reliability module and take Schottky diode in parallel, it is in parallel with driver module, the negative electrode of Schottky diode is connected the saturation voltage drop test side of driver module, anode is connected another port of driver module, this port connects the source electrode of power switch pipe, it is emitter, be used to clamp down on the voltage of saturation voltage drop detection port, be suppressed at very significantly negative pulse of appearance herein, avoid being in the bridge circuit module two power tubes conductings simultaneously of symmetrical operation pattern;
For second class, improve and drive reliability module is introduced resistance and electric capacity on the basis of Schottky diode in parallel filter circuit, wherein, resistance detects between the anode of diode at the saturation voltage drop test side and the saturation voltage drop of driver module, the installation site of electric capacity is identical with the Schottky diode installation site, and it and Schottky diode are connected in the driver module two ends together in parallel; Make two power tubes that are in the symmetrical operation pattern in the bridge circuit module near the dead band, insensitive to interference signal, thus avoid the power tube mistake to drive;
For the 3rd class, the employing of raising driving reliability module reduces from driver module to power switch circuit module loop inductance and the method for driver module internal inductance solves.
The method of raising operational reliability of switch power supply proposed by the invention has following distinguishing feature:
The mistake driving pulse that produces when 1) this method can suppress high-power and super high power power work effectively prolongs useful life of power tube greatly, improves the reliability of power supply.
2) this method can be carried out reforming processing based on general driver module and power switch circuit module, and this method is simple, has significantly reduced design cost high-power and super high power power supply high reliability.
Description of drawings
Fig. 1 is a bridge circuit schematic diagram related to the present invention.
Fig. 2 is the preceding mistake drive pulse waveform that occurs of driven pulse related to the present invention.
Fig. 3 is a driven pulse front edge related to the present invention by the mistake drive pulse waveform of widening that occurs after the lifting gradually;
Fig. 4 is the mistake drive pulse waveform that occurs behind the driven end-of-pulsing related to the present invention.
Fig. 5 is the mistake driving pulse (being the enlarged drawing of Fig. 4) that occurs behind the driven end-of-pulsing related to the present invention.
Fig. 6 is that very significantly negative pulse appears in driver module power tube saturation voltage drop detection port related to the present invention; Wherein, waveform 1 is a driving pulse, and waveform 2 is a power tube saturation voltage drop detection waveform.
Fig. 7 is that traditional driver module and power switch circuit module formed schematic diagram;
Fig. 8 is to the improved schematic diagram of Fig. 7.
Fig. 9 improves a side circuit schematic diagram that drives reliability module.
The present invention is described in further detail below in conjunction with drawings and Examples.
Embodiment
For the ease of understanding technical scheme of the present invention, at first introduce the wherein a kind of relevant work system that the present invention relates to Switching Power Supply.This system mainly is made up of five parts.As shown in Figure 1, comprise four bridge circuit modules A, B, C, D, an operating load.Four bridge circuit modules A, B, C, D have identical circuit structure, and each module is all formed (referring to Fig. 7) by driver module and power switch circuit module again.The main effect of driver module is the sequential requirement according to the power supply of switch, produces driving pulse, and driving power switching circuit module is in work or cut-off state.And the switching tube in the power switch circuit module will carry out work according to sequential.For the Switching Power Supply of different capacity, the selection of switching tube requires to have different watt levels, to satisfy requirement high-power or super high power Switching Power Supply power.Though the structure of these four bridge-type modules is identical, on working method, must satisfy the sequential relationship of Switching Power Supply strictness.Bridge circuit modules A wherein, B has identical working method, and bridge circuit module C, D has identical working method, and when bridge circuit modules A, C were the operating load power supply, bridge circuit module B, D must be in closed condition; Otherwise too, purpose is exactly in order to prevent the power supply shorted to earth.Be exactly in these four bridge circuit module routine, because the operating frequency height of Switching Power Supply, reasons such as power is big, cause the complete machine internal interference very serious, though the inlet power supply place of and super high power Switching Power Supply high-power at these has added the filter circuit of anti-electromagnetic interference, suppressed common mode and differential mode noise greatly, still inner interference still exists, and is easy to generate the mistake driving pulse.
For this reason, the applicant has carried out some circuit modifications to the driver module and the power switch circuit module of bridge circuit module, increase by one and improved the driving reliability module, as shown in Figure 8, driver module and power switch circuit module are the parts of above-mentioned bridge circuit module, they are according to the sequential requirement of Switching Power Supply, for operating load provides power supply or is in cut-off state.Improving the driving reliability module then is for suppressing the treatment circuit that the mistake driving pulse adds.This circuit is handled at above-mentioned several mistake driving pulses specially:
For first kind mistake driving pulse, improve to drive in the reliability module and be provided with Schottky diode, it is in parallel with driver module, the negative electrode of Schottky diode is connected the saturation voltage drop test side (port of driver module) of driver module, anode is connected another port of driver module, this port connects the source electrode (emitter) of power switch pipe, and purpose is to occur very significantly negative pulse herein in order to clamp down on the voltage of saturation voltage drop detection port, to be suppressed at.Schottky diode requires recovery time short on type selecting, requires forward voltage drop low simultaneously.
For second class mistake driving pulse, improve and drive reliability module is introduced resistance and electric capacity on the basis of Schottky diode in parallel filter circuit, Fig. 9 has provided to improve and has driven the side circuit schematic diagram that reliability module solves second class mistake driving pulse, in this circuit, resistance and electric capacity will be brought into play inhibitory action, and resistance detects between the anode of diode at the saturation voltage drop test side and the saturation voltage drop of driver module.The installation site of electric capacity is identical with the Schottky diode installation site, and it and Schottky diode are connected in the driver module two ends together in parallel.
The value of resistance and electric capacity needs the periodic width with reference to the mistake driving pulse, those skilled in the art knows, the product of resistance and electric capacity is the time, and when the value of resistance and electric capacity was set, the time width that just can equal the mistake driving pulse according to the product of resistance and electric capacity was selected.As long as set one of them (resistance or electric capacity) value, the value of another (electric capacity or resistance) has also just been determined.
For the 3rd class mistake driving pulse, the mode that can take to reduce inductance solves, here should be noted that, reduce inductance and not only will reduce the inductance of driver module to the power switch circuit module, also to reduce the inductance of power switch circuit inside modules, because Switching Power Supply is in order to dwindle the volume of complete machine, usually be operated in high frequency mode, stray inductance effect under this pattern is very obvious, must reduce their influences, take to shorten driver module usually and reduce inductance to the mode of power switch circuit module line to power supply, but in high power switching power supply and the actual engineering of super high power Switching Power Supply, be subjected to structural constraint, it is very short that line can not contract.The present invention takes the shunt inductance amount is very little between driver module and power switch circuit module the lead or the mode of copper bar to reduce inductance.Particularly the lead of the driving source electrode (emitter) from the driver module to the power switch pipe is a driving exit on the pin of the source electrode (emitter) that directly is connected the power switch module rather than that be connected to the power switch module in this parallel wire.
In general high power switching power supply and super high power Switching Power Supply, this several method usually adopts simultaneously, can play extraordinary effect to suppressing the mistake driving pulse.The processing method of four bridge circuit modules is identical.
After the present invention realized, the applicant had carried out literature search with regard to related content of the present invention, and concrete content retrieved is as follows:
One, domestic patent retrieval part
1, descriptor: Switching Power Supply drives, and retrieves 5 pieces altogether, and wherein 3 pieces of extracts of related content are as follows
2, descriptor: mistake drives, and it is as follows to retrieve 1 piece of extracts altogether
Two, foreign patent retrieving portion
1. descriptor: switch powerdriver, retrieve 793 pieces altogether, wherein 9 pieces of extracts of related content are as follows
2. descriptor: error driver, retrieve 21 pieces altogether, wherein 1 piece of extracts of related content is as follows
In sum, the method for raising operational reliability of switch power supply proposed by the invention has very effective inhibitory action for a few class mistake driving pulses in the Switching Power Supply of general high power switching power supply and super high power.This method is simple, can transform based on general driver module and power switch circuit module, increase to improve and drive reliability module, just can suppress the mistake driving pulse, prolong the useful life of power switch, greatly reduce the cost of high power switching power supply and super high power Switching Power Supply driver module and power switch circuit module, improved competitiveness of product.
Claims (4)
1. guard method that improves operational reliability of switch power supply, it is characterized in that, this method has increased to improve between the driver module of bridge circuit module and power switch circuit module and has driven reliability module, and this raisings driving reliability module is carried out different processing for three types common pulse;
Described three types pulse is:
The first kind: the mistake driving pulse that occurs before the driven pulse;
Second class: little projection appears in the driven pulse front edge, and lifting gradually, and original driving pulse is widened;
The 3rd class: occur new driving pulse behind the driven end-of-pulsing;
Its processing method is as follows respectively:
For the first kind, improve the driving reliability module and take Schottky diode in parallel, it is in parallel with driver module, the negative electrode of Schottky diode is connected the saturation voltage drop test side of driver module, anode is connected another port of driver module, this port connects the source electrode of power switch pipe, it is emitter, be used to clamp down on the voltage of saturation voltage drop detection port, be suppressed at very significantly negative pulse of appearance herein, avoid being in the bridge circuit module two power tubes conductings simultaneously of symmetrical operation pattern;
For second class, improve and drive reliability module is introduced resistance and electric capacity on the basis of Schottky diode in parallel filter circuit, wherein, resistance detects between the anode of diode at the saturation voltage drop test side and the saturation voltage drop of driver module, the installation site of electric capacity is identical with the Schottky diode installation site, and it and Schottky diode are connected in the driver module two ends together in parallel; Make two power tubes that are in the symmetrical operation pattern in the bridge circuit module near the dead band, insensitive to interference signal, thus avoid the power tube mistake to drive;
For the 3rd class, the employing of raising driving reliability module reduces from driver module to power switch circuit module loop inductance and the method for driver module internal inductance solves.
2. the method for claim 1 is characterized in that, described Schottky diode requires recovery time short on type selecting, requires forward voltage drop low simultaneously.
3. the method for claim 1 is characterized in that, the resistance of the filter circuit of described resistance and electric capacity and the value of electric capacity are selected according to the time width that the product of resistance and electric capacity equals the mistake driving pulse.
4. the method for claim 1, it is characterized in that, described reduction from driver module to power switch circuit module loop inductance and the method for driver module internal inductance be that the lead that the shunt inductance amount is very little between driver module and power switch circuit module or the mode of copper bar reduce inductance; And the lead of the driving source electrode from the driver module to the power switch pipe is directly to be connected driving exit on the pin of source electrode of power switch module rather than that be connected to the power switch module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100236757A CN101635503B (en) | 2009-08-25 | 2009-08-25 | Protective method for improving operational reliability of switch power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100236757A CN101635503B (en) | 2009-08-25 | 2009-08-25 | Protective method for improving operational reliability of switch power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101635503A CN101635503A (en) | 2010-01-27 |
| CN101635503B true CN101635503B (en) | 2011-06-08 |
Family
ID=41594597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100236757A Active CN101635503B (en) | 2009-08-25 | 2009-08-25 | Protective method for improving operational reliability of switch power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101635503B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066812A (en) * | 2013-01-25 | 2013-04-24 | 浪潮电子信息产业股份有限公司 | Design method for improving power-supply efficiency by changing driving voltage of field-effect transistor |
| CN111123061B (en) * | 2019-12-26 | 2021-10-19 | 荣信汇科电气股份有限公司 | Quick response forward and reverse pipe voltage drop detection circuit |
-
2009
- 2009-08-25 CN CN2009100236757A patent/CN101635503B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN101635503A (en) | 2010-01-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100596011C (en) | Coupling inductance dual-buck full bridge inverter | |
| CN102624213A (en) | Power factor correction circuit | |
| CN101667781B (en) | Self-adaptive driving circuit of active clamping switch tube | |
| CN101478252B (en) | X-high frequency chain inverter without DC filtering stage | |
| CN204707032U (en) | Based on the Zero voltage transition circuit of Boost | |
| CN104779790A (en) | Switched inductance quasi-Z source DC-DC converter circuit | |
| CN110460239A (en) | A kind of active clamp flyback converter | |
| CN201018405Y (en) | Whole bridge phase-shift drive circuit | |
| CN103138575B (en) | With the clamp formula Boost of snubber circuit | |
| CN101635503B (en) | Protective method for improving operational reliability of switch power supply | |
| CN101834518A (en) | Mode switching control method and switching control circuit of full-bridge converter | |
| CN112821794B (en) | Single-phase active neutral point clamped three-level soft switching inverter circuit and modulation strategy | |
| CN101386099A (en) | Soft-switch invert welding power numerical control method of electric welding machine | |
| CN110224688A (en) | A kind of gallium nitride power device drive system | |
| CN101499733B (en) | Z source semi-bridge inverter | |
| CN101478230B (en) | Passive soft on-off circuit used for inversion bridge | |
| CN109450263A (en) | One kind recommending mode of resonance driving circuit and its control method | |
| CN201355875Y (en) | Electromagnetic oven circuit based on SoC chip | |
| CN201393178Y (en) | Z-source half-bridge inverter | |
| CN201376134Y (en) | NC soft switch full-bridge phase-shifted welding power source of welding machine | |
| CN102843054A (en) | Single-phase five-level inverter | |
| CN105978372B (en) | A kind of topological circuit and half-bridge topology circuit and three phase full bridge topological circuit | |
| CN105187005A (en) | Miniature photovoltaic inverter with zero input secondary ripple current content | |
| CN201020597Y (en) | Inverter welding power source | |
| CN109687855B (en) | Asynchronous trigger high-voltage pulse modulator based on IGBT |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |