CN201985753U - Lossless absorption circuit - Google Patents
Lossless absorption circuit Download PDFInfo
- Publication number
- CN201985753U CN201985753U CN2011200808570U CN201120080857U CN201985753U CN 201985753 U CN201985753 U CN 201985753U CN 2011200808570 U CN2011200808570 U CN 2011200808570U CN 201120080857 U CN201120080857 U CN 201120080857U CN 201985753 U CN201985753 U CN 201985753U
- Authority
- CN
- China
- Prior art keywords
- circuit
- diode
- field effect
- effect transistor
- power supply
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model relates to a switch converting circuit, in particular to a lossless absorption circuit, which is used for absorbing energy from the circuit. The lossless absorption circuit is composed of a power supply, an inductor, a coil, a field-effect tube, a diode and a capacitor. The lossless absorption circuit is characterized in that the anode of the power supply is connected with one end of the inductor and one end of the coil respectively, the other end of the inductor is connected with the diode, the other end of the coil is connected with the field-effect tube and the diode, the cathode of the power supply is connected with the capacitor and the field-effect tube, and the capacitor is in parallel connection with the field-effect tube through the diode. The lossless absorption circuit realizes feedback of circuit energy absorption, is simple in circuit, has low cost and simultaneously increases efficiency of a device.
Description
Technical field
The utility model relates to switch transformed circuit, is specially a kind of lossless absorption circuit, is used for the energy of absorption circuit.
Background technology
In the various supply units, various switch transformed circuits have all been used, obtained using widely owing to the hard switching circuit is simple and practical, single-ended reverse exciting switching voltage regulator circuit commonly used at present, reason owing to leakage inductance and distributed constant, can produce bigger peak voltage at the pipe two ends,, often adopt simple RCD to absorb circuit in order to suppress peak voltage.Though the practicality of RCD circuit, because its peak voltage portion of energy all consumes by resistance, so heating is bigger, efficient is not high.People have invented many soft switch circuits again and have reduced due to voltage spikes and loss for this reason, but the too complex of soft switch circuit own needs special control, has influenced reliability, has increased cost.
Summary of the invention
The purpose of this utility model is at above technical problem, improves a kind of simple in structure, cost is low, efficient is high lossless absorption circuit.
Concrete technical scheme of the present utility model is as follows:
Lossless absorption circuit, form by forming power supply, inductance, coil, field effect transistor, diode, electric capacity, it is characterized in that: the positive pole of power supply connects and connects inductance, coil respectively, the other end of inductance connects inductance, diode, the other end of coil connects field effect transistor and diode, the negative pole of power supply connects electric capacity and field effect transistor, and electric capacity is in parallel with field effect transistor by diode.
Under the normal condition, the supply voltage that the voltage on the electric capacity equals to import, during power work, field effect transistor makes output voltage stabilization.When the field effect pipe turn-offs, because the existence of leakage inductance etc., the field effect transistor two ends produce peak voltage, diode is open-minded owing to bear forward voltage, charge to electric capacity, inductance bears the reflected voltage of a secondary because the sense value is bigger on it, be that electric capacity is charged to input voltage and adds secondary reflected voltage sum.Because electric capacity is bigger, it is in parallel with field effect transistor by diode, makes the voltage peak at field effect transistor two ends be inhibited.When the field effect pipe was opened, because diode reverse is ended, energy fed back on the input power supply by inductance on the electric capacity.So both absorbed the due to voltage spikes of field effect transistor, energy is not consumed again, has promoted the efficient of circuit.
The utility model has been realized the energy feedback of absorption circuit, and circuit is simple, and cost is low, has promoted the efficient of device simultaneously.This circuit can be applied in other the translation circuit flexibly, constitutes similar absorption circuit to switching tube, forms harmless the absorption.
Description of drawings
Accompanying drawing 1 is a structural representation of the present utility model.
Wherein, 1---power supply, 2---inductance, 3---coil, 4---field effect transistor, 5---diode, 6---electric capacity.
Specific embodiment
The utility model is described in further detail below in conjunction with embodiment.
Lossless absorption circuit, form by forming power supply, inductance, coil, field effect transistor, diode, electric capacity, the positive pole of power supply connects and connects inductance, coil respectively, the other end of inductance connects inductance, diode, the other end of coil connects field effect transistor and diode, the negative pole of power supply connects electric capacity and field effect transistor, and electric capacity is in parallel with field effect transistor by diode.
Under the normal condition, the supply voltage that the voltage on the electric capacity equals to import, during power work, field effect transistor makes output voltage stabilization.When the field effect pipe turn-offs, because the existence of leakage inductance etc., the field effect transistor two ends produce peak voltage, diode is open-minded owing to bear forward voltage, charge to electric capacity, inductance bears the reflected voltage of a secondary because the sense value is bigger on it, be that electric capacity is charged to input voltage and adds secondary reflected voltage sum.Because electric capacity is bigger, it is in parallel with field effect transistor by diode, makes the voltage peak at field effect transistor two ends be inhibited.When the field effect pipe was opened, because diode reverse is ended, energy fed back on the input power supply by inductance on the electric capacity.So both absorbed the due to voltage spikes of field effect transistor, energy is not consumed again, has promoted the efficient of circuit.
The utility model has been realized the energy feedback of absorption circuit, and circuit is simple, and cost is low, has promoted the efficient of device simultaneously.This circuit can be applied in other the translation circuit flexibly, constitutes similar absorption circuit to switching tube, forms harmless the absorption.
Claims (1)
1. lossless absorption circuit, form by forming power supply, inductance, coil, field effect transistor, diode, electric capacity, it is characterized in that: the positive pole of power supply connects and connects inductance, coil respectively, the other end of inductance connects inductance, diode, the other end of coil connects field effect transistor and diode, the negative pole of power supply connects electric capacity and field effect transistor, and electric capacity is in parallel with field effect transistor by diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200808570U CN201985753U (en) | 2011-03-24 | 2011-03-24 | Lossless absorption circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200808570U CN201985753U (en) | 2011-03-24 | 2011-03-24 | Lossless absorption circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201985753U true CN201985753U (en) | 2011-09-21 |
Family
ID=44613203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200808570U Expired - Fee Related CN201985753U (en) | 2011-03-24 | 2011-03-24 | Lossless absorption circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201985753U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103516186A (en) * | 2012-06-28 | 2014-01-15 | 艾默生网络能源有限公司 | Lossless absorption circuit and working method |
| CN107834832A (en) * | 2017-11-27 | 2018-03-23 | 天津航空机电有限公司 | A kind of voltage peak absorbing circuit |
-
2011
- 2011-03-24 CN CN2011200808570U patent/CN201985753U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103516186A (en) * | 2012-06-28 | 2014-01-15 | 艾默生网络能源有限公司 | Lossless absorption circuit and working method |
| CN103516186B (en) * | 2012-06-28 | 2016-08-17 | 艾默生网络能源有限公司 | A kind of lossless absorption circuit and method of work |
| CN107834832A (en) * | 2017-11-27 | 2018-03-23 | 天津航空机电有限公司 | A kind of voltage peak absorbing circuit |
| CN107834832B (en) * | 2017-11-27 | 2019-12-03 | 天津航空机电有限公司 | A kind of voltage peak absorbing circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102832809B (en) | Adjustment of inductance switched capacitor passive clamping soft switch high gain boost code converter | |
| CN203233309U (en) | High-gain high-efficiency boost converter realized by three-winding coupling inductor | |
| CN103490628B (en) | A kind of single-phase high-gain boost converter | |
| CN203119763U (en) | Quasi-interweaving parallel high-gain converter with voltage multiplication unit | |
| CN103354420A (en) | Active clamping high gain boost converter using coupling inductor | |
| CN103051179A (en) | High step-up ratio voltage doubling structure passive lossless clamped converter | |
| CN104638932A (en) | Multi-resonant converter | |
| CN102005931B (en) | Forward converter | |
| CN104283419A (en) | Secondary type high-gain boosting converter with switched capacitors and coupled inductor | |
| CN106026667A (en) | Method for improving cross regulation rate of multi-path output switching power supply | |
| CN201985753U (en) | Lossless absorption circuit | |
| CN104201874B (en) | The lossless absorption circuit and Switching Power Supply of a kind of Switching Power Supply output rectifying tube | |
| CN204258617U (en) | A kind of circuit structure solving flyback type of switch source-drain sense problem | |
| CN203645540U (en) | A high-efficiency high-gain DC-DC converter with coupling inductors | |
| CN203039579U (en) | High gain voltage-multiplying structure active lossless clamp converter | |
| CN202759386U (en) | Flyback switch power supply circuit and flyback switch power supply | |
| CN201656781U (en) | Forward converter | |
| CN113422515B (en) | Non-isolated bidirectional soft switch DC-DC converter | |
| CN103746565A (en) | High-gain active lossless clamping interleaving converter with internal transformer and voltage-multiplying structure | |
| CN203039580U (en) | passive Passive lossless clamp high gain converter with voltage-multiplying unit | |
| CN204578348U (en) | A kind of switch tube driving circuit | |
| CN204131391U (en) | A kind of quadratic form high-gain boost converter with switching capacity and coupling inductance | |
| CN203691234U (en) | Dual output bus type high-gain converter based on coupling inductor voltage multiplying structure | |
| CN103762852B (en) | High-efficiency high-gain DC-DC converter with double coupling inductors | |
| CN203691247U (en) | High-efficiency high-gain DC-DC converter with double coupling inductors |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110921 Termination date: 20140324 |