CN208272858U - A kind of resonant reset circuit - Google Patents
A kind of resonant reset circuit Download PDFInfo
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- CN208272858U CN208272858U CN201820541099.XU CN201820541099U CN208272858U CN 208272858 U CN208272858 U CN 208272858U CN 201820541099 U CN201820541099 U CN 201820541099U CN 208272858 U CN208272858 U CN 208272858U
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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 resonant reset circuit, including transformer, resonant capacitance Cr, switching tube Sw1, inductance L, output capacitance Co and rectifier diode D1 and sustained diode 2, switching tube Sw1 and transformer original grade coil Lp is connected in series, the positive grade of rectifier diode D1 and sustained diode 2 is connect with two output ends of transformer secondary coil Ls respectively, it is connect after the connection of the negative grade of rectifier diode D1 and sustained diode 2 with the input terminal of inductance L, the anode of output capacitance Co is connect with the output end of inductance L, the cathode of output capacitance Co is connect with the anode of sustained diode 2, rectifier diode D1 and sustained diode 2 constitute rectification circuit and connect with transformer secondary coil Ls, by the electric current after rectifier circuit rectifies through inductance L and output capacitance Co Output is connected in parallel to load, resonant capacitance Cr with rectifier diode D1 after the filter circuit filtering of composition；The utility model keeps the circuit of single capacitor resonant reset more efficient, is more widely used.
Description
Technical field
The utility model relates to the practicability circuits more particularly to a kind of resonant reset circuit of a kind of pair of resonant reset, belong to
In reset circuit technical field.
Background technique
In Switching Power Supply, single-end ortho-exciting is simple with it, reliable, output power is changeable, deep to be welcome by everybody but single
Rectifying sharp magnetic reset is a troublesome problem, and usually everybody will use tertiary winding reset, RCD resets, active-clamp is multiple
The magnetizing inductance resonant reset of position and single capacitor and transformer；RCD, active-clamp and single capacitor resonant reset are inherently
Say it is all magnetizing inductance and reset capacitance resonance using transformer, so that excitation and capacitor resonance, magnetizing inductance is only right in RCD
Capacitor C charging, resistance R electric discharge, active-clamp and single capacitor reset are all two-way charge and discharge, and magnetization energy is not consumed,
Therefore efficiency is higher；Wherein active clamping circuir is complex, the simplest with the circuit of single capacitor resonant reset, but due to present
In common reset circuit, capacitor has portion of energy to be consumed in vain in each switch periods, therefore single capacitor resonance is multiple
The circuit use of position is not extensive.
Summary of the invention
To solve the deficiencies in the prior art, the utility model provides a kind of resonant reset circuit, and resonant capacitance Cr is arranged
It, can be so that magnetic by transformer secondary coil Ls and resonant capacitance Cr resonance in the rectifying tube of transformer secondary coil output
Core resets, and can also allow the complete feedback of magnetization energy, keeps the circuit of single capacitor resonant reset more efficient, obtains more extensive
Using.
The technology employed by the present utility model is
A kind of resonant reset circuit, including transformer, resonant capacitance Cr, switching tube Sw1, inductance L, output capacitance Co and
Rectifier diode D1 and sustained diode 2, the switching tube Sw1 and transformer original grade coil Lp are connected in series, the rectification two
The positive grade of pole pipe D1 and sustained diode 2 is connect with two output ends of transformer secondary coil Ls respectively, rectifier diode D1
It is connect after being connected with the negative grade of sustained diode 2 with the input terminal of inductance L, the output end of the anode and inductance L of output capacitance Co
Connection, the cathode of output capacitance Co are connect with the anode of sustained diode 2, and rectifier diode D1 and sustained diode 2 are constituted
Rectification circuit is connect with transformer secondary coil Ls, by the electric current after rectifier circuit rectifies through inductance L and output capacitance Co group
At filter circuit filtering after output to load, resonant capacitance Cr is connected in parallel with rectifier diode D1.
As the further preferred of the utility model, the resonant capacitance Cr is high-frequency pole-free capacitor, resonant capacitance
The harmonic period of Cr and transformer secondary coil Ls is 0.3~0.6 times of switching tube Sw1 switch periods.
As the further preferred of the utility model, the resonant capacitance Cr is ceramic electrical perhaps thin-film capacitor.
As the further preferred of the utility model, the capacitance of the resonant capacitance Cr is according to formulaCalculate selection, wherein T is the switch periods of switching tube Sw1 and the duty cycle of circuit.
The utility model has the beneficial effects that: resonant capacitance Cr to be arranged in the rectifying tube of transformer secondary coil output
In, it can be so that magnetic core reset, can also allow magnetization energy complete by transformer secondary coil Ls and resonant capacitance Cr resonance
Feedback keeps the circuit of single capacitor resonant reset more efficient, is more widely used.
Detailed description of the invention
FIG. 1 is a schematic structural view of the utility model；
Fig. 2 is the waveform timing chart of resonant capacitance Cr and switching tube Sw1 on the utility model rectifying tube.
Specific embodiment
Specific introduction is done to the utility model with reference to the accompanying drawings and examples.
As illustrated in fig. 1 and 2: the present embodiment is a kind of resonant reset circuit, including transformer, resonant capacitance Cr, switching tube
Sw1, inductance L, output capacitance Co and rectifier diode D1 and sustained diode 2, switching tube Sw1 and transformer original grade coil
Lp is connected in series, the positive grade of rectifier diode D1 and sustained diode 2 respectively with two output ends of transformer secondary coil Ls
It is connect after the negative grade connection of connection, rectifier diode D1 and sustained diode 2 with the input terminal of inductance L, output capacitance Co is just
Pole is connect with the output end of inductance L, and the cathode of output capacitance Co connect with the anode of sustained diode 2, rectifier diode D1 with
Sustained diode 2 constitutes rectification circuit and connect with transformer secondary coil Ls, by the electric current after rectifier circuit rectifies through inductance
Output is connected in parallel to load, resonant capacitance Cr with rectifier diode D1 after the filter circuit filtering of L and output capacitance Co composition.
Resonant capacitance Cr in the present embodiment is high-frequency pole-free capacitor, resonant capacitance Cr and transformer secondary coil Ls's
Harmonic period is 0.5 times of switching tube Sw1 switch periods, in practical application, resonant capacitance Cr and transformer secondary coil Ls
Harmonic period be also possible to 0.3,0.4 or 0.6 times of switching tube Sw1 switch periods.
Resonant capacitance Cr in the present embodiment is ceramic condenser, in practical application, being also possible to thin-film capacitor.
In the present embodiment, the capacitance of resonant capacitance Cr is according to formulaSelection is calculated,
In, T is the switch periods of switching tube Sw1 and the duty cycle of circuit.
The utility model resonant capacitance Cr is arranged in the rectifying tube of transformer secondary coil output, passes through transformer
Grade coil Ls and resonant capacitance Cr resonance can also allow the complete feedback of magnetization energy, keep single capacitor humorous so that magnetic core resets
The circuit resetted that shakes is more efficient, is more widely used.
The above is only the preferred embodiment of the utility model patent, it is noted that for the general of the art
For logical technical staff, under the premise of not departing from the utility model patent principle, several improvements and modifications can also be made, this
A little improvements and modifications also should be regarded as the protection scope of the utility model patent.
Claims (3)
1. a kind of resonant reset circuit, it is characterised in that: including transformer, resonant capacitance Cr, switching tube Sw1, inductance L, output
Capacitor Co and rectifier diode D1 and sustained diode 2, the switching tube Sw1 and transformer original grade coil Lp are connected in series,
The positive grade of the rectifier diode D1 and sustained diode 2 is connect with two output ends of transformer secondary coil Ls respectively, whole
It is connect after the connection of the negative grade of stream diode D1 and sustained diode 2 with the input terminal of inductance L, anode and the electricity of output capacitance Co
Feel the output end connection of L, the cathode of output capacitance Co is connect with the anode of sustained diode 2, rectifier diode D1 and afterflow two
Pole pipe D2 constitutes rectification circuit and connect with transformer secondary coil Ls, by the electric current after rectifier circuit rectifies through inductance L and defeated
Output is connected in parallel to load, resonant capacitance Cr with rectifier diode D1 after the filter circuit filtering of capacitor Co composition out.
2. a kind of resonant reset circuit according to claim 1, which is characterized in that the resonant capacitance Cr be high frequency without
The harmonic period of polar capacitor, resonant capacitance Cr and transformer secondary coil Ls are the 0.3~0.6 of switching tube Sw1 switch periods
Times.
3. a kind of resonant reset circuit according to claim 1 or 2, which is characterized in that the resonant capacitance Cr is pottery
Porcelain capacitor or thin-film capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820541099.XU CN208272858U (en) | 2018-04-17 | 2018-04-17 | A kind of resonant reset circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820541099.XU CN208272858U (en) | 2018-04-17 | 2018-04-17 | A kind of resonant reset circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208272858U true CN208272858U (en) | 2018-12-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820541099.XU Active CN208272858U (en) | 2018-04-17 | 2018-04-17 | A kind of resonant reset circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208272858U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113037093A (en) * | 2021-03-16 | 2021-06-25 | 西安科技大学 | Forward converter with secondary rectifier diode connected with capacitor in parallel and system |
-
2018
- 2018-04-17 CN CN201820541099.XU patent/CN208272858U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113037093A (en) * | 2021-03-16 | 2021-06-25 | 西安科技大学 | Forward converter with secondary rectifier diode connected with capacitor in parallel and system |
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