CN208158434U - A kind of auxiliary power circuit fed back using asymmetrical half-bridge - Google Patents
A kind of auxiliary power circuit fed back using asymmetrical half-bridge Download PDFInfo
- Publication number
- CN208158434U CN208158434U CN201820484617.9U CN201820484617U CN208158434U CN 208158434 U CN208158434 U CN 208158434U CN 201820484617 U CN201820484617 U CN 201820484617U CN 208158434 U CN208158434 U CN 208158434U
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- Prior art keywords
- switch
- bridge
- fed back
- asymmetrical half
- inductance coil
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- 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
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Abstract
The utility model discloses a kind of auxiliary power circuits fed back using asymmetrical half-bridge, introduce asymmetrical half-bridge flyback, when first switch tube is connected and second switch disconnects, electric current passes through second switch, capacitance, inductance coil, transformer primary side respectively since out-put supply, and carries out filling energy to inductance coil；First switch tube S1When disconnection and second switch connection, the electric energy stored in inductance coil is discharged through transformer primary side, first switch tube, capacitance, is realized that no-voltage is open-minded, is effectively reduced the switching loss of current transformer.To the way for using double-transistor flyback compared with the prior art, the utility model is greatly improved in reliability and efficiency.
Description
Technical field
The utility model relates to a kind of auxiliary power circuit, especially a kind of accessory power supply fed back using asymmetrical half-bridge
Circuit.
Background technique
Currently, investment energetically and new energy with country to wind-power electricity generation, solar energy power generating and energy-accumulating power station
The support energetically in source, formation of Li-ion batteries project, high-power field have become the important directions developed now.And in height
It presses in high-power field, the stability and working efficiency of accessory power supply have a great impact to entire circuit.In existing technology
In, the auxiliary source design of high pressure is most of to be realized using double-transistor flyback, and double-transistor flyback can be real in big input voltage range
Existing pressure stabilizing, and output diode is easy to choose.But the driving of the two of double-transistor flyback switching tubes cannot be guaranteed consistency, and
And be hard switching, there are certain deficiencies in reliability and efficiency.
Utility model content
To solve the above problems, using asymmetrical half-bridge flyback the purpose of this utility model is to provide a kind of, applying
A kind of middle auxiliary power circuit fed back using asymmetrical half-bridge for solving switching tube driving and being consistent.
Technical solution used by the invention for solving the technical problem is：
A kind of auxiliary power circuit fed back using asymmetrical half-bridge, it is characterised in that：Including semi-bridge inversion module, input
Power supply, transformer, capacitance, circuit of reversed excitation module and the inductance coil for energy storage；The input power, semi-bridge inversion mould
Block, capacitance, inductance coil, transformer primary side are sequentially connected；
The semi-bridge inversion module includes first switch tube and second switch, the source electrode of the second switch and first
The drain electrode of switching tube is connected by the capacitance and inductance coil with transformer primary side after being connected, and described second opens
The anode of the drain electrode and input power of closing pipe connects, and the source electrode of the first switch tube and the cathode of input power connect.
Further, the input power is Single-Chip Integration regulated power supply.
Further, the Single-Chip Integration regulated power supply includes resonance chip, and the resonance chip model is UC3843.
Further, the grid of the first switch tube and second switch is connected to external signal input terminals mouth.
Further, the circuit of reversed excitation module includes diode and Support Capacitor, and the diode and Support Capacitor are connected
And it is connected with the both ends of Circuit Fault on Secondary Transformer.
The utility model has the beneficial effects that：A kind of auxiliary electricity using asymmetrical half-bridge feedback that the utility model uses
Source circuit introduces asymmetrical half-bridge flyback, and when first switch tube is connected and second switch disconnects, electric current is since out-put supply
Pass through second switch, capacitance, inductance coil, transformer primary side respectively, and inductance coil is carried out to fill energy；First
Switching tube S1Disconnect and when second switch is connected, the electric energy stored in inductance coil through transformer primary side, first switch tube,
Capacitance is discharged, so that consistent requirement must be driven by removing two switching tubes of traditional double-transistor flyback from, is reached soft and is opened
Opening for circuit is effectively reduced in the effect of pass
Loss is closed, reliability and switch efficiency are improved.
Detailed description of the invention
The utility model is described in further detail with example with reference to the accompanying drawing.
Fig. 1 is a kind of circuit diagram of the auxiliary power circuit using asymmetrical half-bridge feedback of the utility model.
Specific embodiment
Referring to Fig.1, a kind of auxiliary power circuit fed back using asymmetrical half-bridge of the utility model, it is characterised in that：
Including semi-bridge inversion module 1, input power Vin, transformer 2, capacitance Cr, circuit of reversed excitation module 3 and the inductance for energy storage
Coil Lr；The input power Vin, semi-bridge inversion module 1, capacitance Cr, inductance coil Lr, transformer primary side NPSuccessively connect
It connects；
The semi-bridge inversion module 1 includes first switch tube S1With second switch S2, the second switch S2Source electrode
With first switch tube S1Drain electrode be connected after by the capacitance CrWith inductance coil LrWith transformer primary side NPIt is connected
It connects, the second switch S2Drain electrode and input power VinAnode connection, the first switch tube S1Source electrode and input
Power supply VinCathode connection.
Wherein, first switch tube S1Connection and second switch S2When disconnection, electric current is from out-put supply VinStart to pass through respectively
Cross second switch S2, capacitance Cr, inductance coil Lr, transformer primary side NP, and to inductance coil LrIt carries out filling energy；The
One switching tube S1Disconnection and second switch S2When connection, inductance coil LrThe electric energy of middle storage is through transformer primary side NP, first
Switching tube S1, capacitance CrIt is discharged, realizes that no-voltage is open-minded.It is complete that the release process electric current is constantly decreased to release
It is 0.Power supply can be obtained in above-mentioned two situations, thus two switching tubes for removing traditional double-transistor flyback from must drive it is consistent
It is required that improving the flexibility of switching tube application, and it can be realized the effect of Sofe Switch.
Further, the input power VinFor Single-Chip Integration regulated power supply.
Further, the Single-Chip Integration regulated power supply includes resonance chip, and the resonance chip model is UC3843.
Wherein, UC3843 is a kind of high performance fixed frequency current-mode controller.UC3843 drives in the present embodiment
First switch tube S1With second switch S2To control 2 first winding on-off of high frequency transformer, and then obtain multiple groups circuit of reversed excitation 3
Voltage output.This output is through diode DrRectification, Support Capacitor V2Multi-channel DC voltage is obtained after filtering.
Further, the first switch tube S1With second switch S2Grid be connected to external signal input terminals mouth.
External signal described in above-mentioned steps refers to for controlling first switch tube S1With second switch S2Opening and closing shape
The signal of state.
Further, the circuit of reversed excitation module 3 includes diode DrWith Support Capacitor V2, the diode DrWith support electricity
Hold V2Connect and with Circuit Fault on Secondary Transformer NsBoth ends be connected.
Wherein, first switch tube S1Connection and second switch S2When disconnection, circuit of reversed excitation is fixed by transformer 2
Electric current, first switch tube S1Disconnection and second switch S2When connection, due to inductance coil LrThe process of release electric energy is to decay
Journey, so diode DrIn electric current accordingly constantly reduce to 0, to realize the softening of secondary side diode.
The above, the only preferred embodiment of the utility model, the utility model are not limited to above-mentioned implementation
Mode, as long as its technical effect for reaching the utility model with identical means, all should belong to the protection scope of the utility model.
Claims (5)
1. a kind of auxiliary power circuit fed back using asymmetrical half-bridge, it is characterised in that：Including semi-bridge inversion module (1), defeated
Enter power supply (Vin), transformer (2), capacitance (Cr), circuit of reversed excitation module (3) and the inductance coil (L for energy storager)；Institute
State input power (Vin), semi-bridge inversion module (1), capacitance (Cr), inductance coil (Lr), transformer primary side (NP) successively
Connection；
The semi-bridge inversion module (1) includes first switch tube (S1) and second switch (S2), the second switch (S2)
Source electrode and first switch tube (S1) drain electrode be connected after by the capacitance (Cr) and inductance coil (Lr) and transformer one
Secondary side (NP) be connected, the second switch (S2) drain electrode and input power (Vin) anode connection, the first switch
Manage (S1) source electrode and input power (Vin) cathode connection.
2. a kind of auxiliary power circuit fed back using asymmetrical half-bridge according to claim 1, it is characterised in that：It is described
Input power (Vin) it is Single-Chip Integration regulated power supply.
3. a kind of auxiliary power circuit fed back using asymmetrical half-bridge according to claim 2, it is characterised in that：It is described
Single-Chip Integration regulated power supply includes resonance chip, and the resonance chip model is UC3843.
4. a kind of auxiliary power circuit fed back using asymmetrical half-bridge according to claim 1, it is characterised in that：It is described
First switch tube (S1) and second switch (S2) grid be connected to external signal input terminals mouth.
5. a kind of auxiliary power circuit fed back using asymmetrical half-bridge according to claim 1, it is characterised in that：It is described
Circuit of reversed excitation module (3) includes diode (Dr) and Support Capacitor (V2), the diode (Dr) and Support Capacitor (V2) series connection is simultaneously
And with Circuit Fault on Secondary Transformer (Ns) both ends be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820484617.9U CN208158434U (en) | 2018-04-04 | 2018-04-04 | A kind of auxiliary power circuit fed back using asymmetrical half-bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820484617.9U CN208158434U (en) | 2018-04-04 | 2018-04-04 | A kind of auxiliary power circuit fed back using asymmetrical half-bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208158434U true CN208158434U (en) | 2018-11-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820484617.9U Expired - Fee Related CN208158434U (en) | 2018-04-04 | 2018-04-04 | A kind of auxiliary power circuit fed back using asymmetrical half-bridge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208158434U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110048496A (en) * | 2019-04-23 | 2019-07-23 | 甘肃南洋新能源科技发展有限公司 | A kind of low-cost wireless method of electric energy transfer and device |
-
2018
- 2018-04-04 CN CN201820484617.9U patent/CN208158434U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110048496A (en) * | 2019-04-23 | 2019-07-23 | 甘肃南洋新能源科技发展有限公司 | A kind of low-cost wireless method of electric energy transfer and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181127 Termination date: 20200404 |