CN107947555A - A kind of low-loss type absorbing circuit suitable for push-pull converter - Google Patents
A kind of low-loss type absorbing circuit suitable for push-pull converter Download PDFInfo
- Publication number
- CN107947555A CN107947555A CN201711256286.XA CN201711256286A CN107947555A CN 107947555 A CN107947555 A CN 107947555A CN 201711256286 A CN201711256286 A CN 201711256286A CN 107947555 A CN107947555 A CN 107947555A
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- China
- Prior art keywords
- capacitance
- diode
- push
- parallel connection
- pull converter
- 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.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/337—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/34—Snubber circuits
- H02M1/348—Passive dissipative snubbers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention proposes a kind of low-loss type absorbing circuit suitable for push-pull converter, by capacitance C1, C2, C3, C4, diode D1, D2, resistance R3 compositions；A branch is composed in series after capacitance C1, C2 parallel connection with diode D1, which is grounded at metal-oxide-semiconductor Q1 both ends, wherein one end；Capacitance C1, C2 parallel connection is followed by the anode in diode D1；Another branch is composed in series after capacitance C3, C4 parallel connection with diode D2, which is grounded at metal-oxide-semiconductor Q2 both ends, wherein one end；Capacitance C3, C4 parallel connection is followed by the anode in diode D2；Resistance R3 is connected on the parallel connected end of capacitance C1, C2, C3, C4 and the V of transformer in push-pull converterin+Between end.Energy on absorption circuit capacitor of the present invention is not discharged by switching tube or its fly-wheel diode, can partly feed back to DC power supply, and then reduces the loss of absorbing circuit, is reduced the peak voltage on switching tube and is improved push-pull converter efficiency.
Description
Technical field
The present invention relates to aviation secondary electric source technical field, is specially that a kind of low-loss type suitable for push-pull converter is inhaled
Circuit is received, for the DC-DC push-pull converter in aviation secondary electric source.
Background technology
Push-pull converter belongs to the Switching Power Supply topology with transformer isolation, during switching tube turns off, transformer
Leakage inductance and the parasitic capacitance resonance of switching tube peak voltage can be produced on switching tube, since also there are other spuious in circuit
Inductance and stray capacitance, can also produce overvoltage and with oscillatory occurences.If peak voltage is excessive, switch will be damaged
Pipe, so it is excessive to suppress peak voltage by the way of absorbing circuit at present.
The existing absorbing circuit of push-pull converter usually has RC absorbing circuits, RCD absorbing circuits, they utilize capacitance
Characteristic is turning on and off moment, the impact of external circuit switch tube to buffer switching tube.And the electric discharge of capacitance is then to pass through electricity
Hinder to carry out, so by switching tube discharge its electric current can be caused excessive to avoid capacitance, cause a degree of damage.This
One common feature of two kinds of absorbing circuits is exactly that capacitive absorption part energy will be consumed by other elements of circuit.This
The circuit of sample has two shortcomings：First, reduce the efficiency of whole converter；Second, device is produced in a device due to consumed energy
Raw additional heat.
The content of the invention
Existing in the prior art to solve the problems, such as, the present invention proposes that a kind of low-loss type suitable for push-pull converter absorbs
Circuit, can reduce the peak voltage on switching tube and improve push-pull converter efficiency, the energy on the absorption circuit capacitor
Amount is not discharged by switching tube or its fly-wheel diode, can partly feed back to DC power supply, and then reduce absorbing circuit
Loss.
The technical scheme is that：
A kind of low-loss type absorbing circuit suitable for push-pull converter, it is characterised in that：By capacitance C1, C2, C3,
C4, diode D1, D2, resistance R3 compositions；
Be composed in series a branch after capacitance C1, C2 parallel connection with diode D1, the branch circuit parallel connection at metal-oxide-semiconductor Q1 both ends, its
Middle one end ground connection；Capacitance C1, C2 parallel connection is followed by the anode in diode D1；
Be composed in series another branch after capacitance C3, C4 parallel connection with diode D2, the branch circuit parallel connection at metal-oxide-semiconductor Q2 both ends,
Wherein one end is grounded；Capacitance C3, C4 parallel connection is followed by the anode in diode D2；
Resistance R3 is connected on the parallel connected end of capacitance C1, C2, C3, C4 and the V of transformer in push-pull converterin+Between end.
Further preferred solution, a kind of low-loss type absorbing circuit suitable for push-pull converter, its feature exist
In：Capacitance C1 and C4 use the monolithic capacitor of positive temperature coefficient, and capacitance C2 and C3 use the thin-film capacitor of negative temperature coefficient.
Beneficial effect
The advantage of the invention is that：
1st, the efficiency of whole converter can be improved；
2nd, due to voltage spikes during switching tube shut-off can be reduced；
3rd, influence of the temperature drift to circuit is reduced.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination accompanying drawings below to embodiment
Substantially and it is readily appreciated that, wherein：
Fig. 1：Push-pull converter topology schematic diagram with low damage absorbing circuit.
Embodiment
The embodiment of the present invention is described below in detail, the embodiment is exemplary, it is intended to for explaining the present invention, and
It is not considered as limiting the invention.
Low-loss type absorbing circuit proposed by the present invention suitable for push-pull converter is mainly used on aviation secondary electric source,
Purpose is the peak voltage reduced on switching tube and improves push-pull converter efficiency.
As shown in Figure 1, the low-loss type absorbing circuit of push-pull converter should be suitable for by capacitance C1, C2, C3, C4, two poles
Pipe D1, D2, resistance R3 compositions, wherein connect to form two branches with D1, D2 respectively after C1, C2, C3, C4 parallel connection, then respectively simultaneously
The both ends of metal-oxide-semiconductor Q1, Q2 are associated in, R3 is connected on the parallel connected end (ungrounded GND ends) of C1, C2, C3, C4 and the V of transformerin+Hold it
Between.Turned on below with Q1, the process of Q2 shut-offs illustrates.
In Q1 turn on process, Q2 shut-offs, Q2 drain-source voltages uDS2Rise to twice of power input voltage 2Vin, and press
Vin+——LP2--- D2 --- C (equivalent capacity after C C1, C2, C3, C4 parallel connection) --- Vin-Direction give capacitance C charging,
Capacitance C voltage uC2V is risen to quicklyin, D1 bears back-pressure and is in cut-off state.
When Q1 is begun to turn off, Q2 conductings, the drain-source voltage u of Q1DS12V is risen to from the forward saturation voltage drop of metal-oxide-semiconductorin,
Due to uDS1<uC, D1 is still in cut-off state；The drain-source voltage u of Q2DS2<2Vin, D2 is also at cut-off state.In uDS1On continuing
During rising, the drain current i of Q1ds1Start drastically to decline, leakage inductance connects up spuious L with major loop is stored inmEnergy in inductance
Amount is rapid to be discharged, at this time uDS1=2Vin+Lm(dids1/dt)>uC, diode D1 conductings.U is pressed at this timeDS1——D1——C——
GND directions, the electric energy magnetic energy in leakage inductance and stray inductance being changed into capacitor.Although the i when Q1 is turned offds1Strongly reduce,
But due to electric current i on diode D1D1Presence, can be to uDS1Drastically rise effectively suppressed.In uDS1Fall back to and be less than
uCWhen, D1 cut-offs, and D2 is also cut-off state at this time, the energy on capacitance C begins through R3 to power supply feedback, C ---
R3——Vin+——Vin-, uCBegin to decline.
This absorption circuit as seen through the above analysis, can not only realize voltage point when suppressing switching tube shut-off
Peak, and the electric discharge of capacitance C is without Q1, Q2 and its fly-wheel diode, but can be directly defeated to direct current by energy feedback
Enter power supply, the caloric value of absorbing circuit resistance can be reduced.
The present invention has selected monolithic capacitor C1, C4 and negative temperature coefficient of positive temperature coefficient in the selection of capacitance C-material
Thin-film capacitor C2, C3 it is used in parallel, the influence of temperature drift can be made reduce.
Low-loss type absorbing circuit provided by the invention suitable for push-pull converter applies certain aviation two at home at present
On secondary source product, which is also applicable in other require on efficient secondary power supply product.
Although the embodiment of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, those of ordinary skill in the art are not departing from the principle of the present invention and objective
In the case of above-described embodiment can be changed within the scope of the invention, change, replace and modification.
Claims (2)
- A kind of 1. low-loss type absorbing circuit suitable for push-pull converter, it is characterised in that：By capacitance C1, C2, C3, C4, two Pole pipe D1, D2, resistance R3 compositions；It is composed in series a branch after capacitance C1, C2 parallel connection with diode D1, the branch circuit parallel connection is at metal-oxide-semiconductor Q1 both ends, wherein one End ground connection；Capacitance C1, C2 parallel connection is followed by the anode in diode D1；Another branch is composed in series after capacitance C3, C4 parallel connection with diode D2, the branch circuit parallel connection at metal-oxide-semiconductor Q2 both ends, wherein One end is grounded；Capacitance C3, C4 parallel connection is followed by the anode in diode D2；Resistance R3 is connected on the parallel connected end of capacitance C1, C2, C3, C4 and the V of transformer in push-pull converterin+Between end.
- A kind of 2. low-loss type absorbing circuit suitable for push-pull converter according to claim 1, it is characterised in that：Capacitance C1 and C4 uses the monolithic capacitor of positive temperature coefficient, and capacitance C2 and C3 use the thin-film capacitor of negative temperature coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711256286.XA CN107947555A (en) | 2017-12-04 | 2017-12-04 | A kind of low-loss type absorbing circuit suitable for push-pull converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711256286.XA CN107947555A (en) | 2017-12-04 | 2017-12-04 | A kind of low-loss type absorbing circuit suitable for push-pull converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107947555A true CN107947555A (en) | 2018-04-20 |
Family
ID=61948403
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711256286.XA Pending CN107947555A (en) | 2017-12-04 | 2017-12-04 | A kind of low-loss type absorbing circuit suitable for push-pull converter |
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| CN (1) | CN107947555A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109849678A (en) * | 2019-01-25 | 2019-06-07 | 云南航天神州汽车有限公司 | A kind of electric car regenerative braking safety control |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066880A (en) * | 2012-12-07 | 2013-04-24 | 武汉华中数控股份有限公司 | Push-pull inverter circuit |
| CN103178702A (en) * | 2013-01-18 | 2013-06-26 | 深圳市安托山技术有限公司 | Soft turn-off lossless snubber for power supply |
| CN203562942U (en) * | 2013-09-30 | 2014-04-23 | 洛阳隆盛科技有限责任公司 | Voltage spike lossless absorption circuit |
-
2017
- 2017-12-04 CN CN201711256286.XA patent/CN107947555A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066880A (en) * | 2012-12-07 | 2013-04-24 | 武汉华中数控股份有限公司 | Push-pull inverter circuit |
| CN103178702A (en) * | 2013-01-18 | 2013-06-26 | 深圳市安托山技术有限公司 | Soft turn-off lossless snubber for power supply |
| CN203562942U (en) * | 2013-09-30 | 2014-04-23 | 洛阳隆盛科技有限责任公司 | Voltage spike lossless absorption circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109849678A (en) * | 2019-01-25 | 2019-06-07 | 云南航天神州汽车有限公司 | A kind of electric car regenerative braking safety control |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20180420 |