CN209105040U - A kind of soft switch control circuit - Google Patents
A kind of soft switch control circuit Download PDFInfo
- Publication number
- CN209105040U CN209105040U CN201822147753.1U CN201822147753U CN209105040U CN 209105040 U CN209105040 U CN 209105040U CN 201822147753 U CN201822147753 U CN 201822147753U CN 209105040 U CN209105040 U CN 209105040U
- Authority
- CN
- China
- Prior art keywords
- circuit
- output end
- switch control
- wave filtering
- soft switch
- 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
Classifications
-
- 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
- Electronic Switches (AREA)
Abstract
The utility model discloses a kind of soft switch control circuits, by the series resonant circuit topology formation based on zero voltage switch ZVS, circuit includes current rectifying and wave filtering circuit and inverter circuit, current rectifying and wave filtering circuit input terminal is connect with single phase alternating current power supply, output end connects inverter circuit, output end of the output end of inverter circuit as soft switch control circuit backend load circuit, inverter circuit includes 4 switching devices, wherein 2 are one group of series connection, two groups of switching devices are connected in parallel, two common ends that two groups of switching devices are connected in parallel are connected to the output end of current rectifying and wave filtering circuit, a resistance has been sequentially connected in series according to current signal flow direction between the common end of concatenated switching device in the common end of concatenated switching device and second group in first group, one capacitor and an inductance.The utility model uses zero voltage switch combination series resonant circuit topological structure, has reached the working condition of Sofe Switch, has reduced switching losses, reduced the switching loss of system, overall efficiency significantly improves.
Description
Technical field
The utility model belongs to power electronics field, and in particular to a kind of soft switch control circuit.
Background technique
In Switching Power Supply design, the critical issue that high performance switch power supply must solve when the control of output voltage, energy
It is no that design control circuit of good performance completely important.Induction heating power has height compared with traditional heating method
Effect, green, reliable, heating is fast, easily realizes the advantages that control.This patent is with the high-frequency induction based on pulse density modulated (PDM)
Heating power supply main study subject.
Most of various controlled resonant converter is with the presence of following problems: the higher kurtosis resonance current of controlled resonant converter
And voltage, lead to that there are biggish switching losses, while also requiring switching device voltage rating with higher and rated current.
In the switching tube down periods, manages interior D-S electric current and do not fall to zero yet when collector voltage rises, be thus overlapped, at this time
Turn-off power loss it is larger, i.e. hard switching state.Switching frequency is higher, and the switching loss of switching device also can be bigger.Due to switch
Loss increases, and required radiator volume can be made to become larger, to influence the miniaturization of induction heating power.Moreover, investing temperature meeting
Rise, leads to serious junction temp of transistor.So high frequency and miniaturization in order to realize induction heating power, it is necessary to try
Reduce the switching loss of switching tube.So that problem above has been obtained effective solution by controlled resonant converter and use soft switch technique,
Increase resonant LC-circuit in original switching circuit, switching tube is opened and closed when sinusoidal current is reduced to zero.So closing
There was only small overlapping between the drop-out current and raised voltage at moment and between the ascending current and drop-out voltage of turn-on instant,
Thus greatly reduce switching loss.
Sofe Switch control is one of current power electronics field research hotspot, due to using traditional hard switching Power Regulation side
The switching loss of the inverter of formula is larger, and design uses Sofe Switch Power Regulation in this patent.Common Sofe Switch skill at this stage
Art mainly includes that zero voltage switch (ZVS), Zero Current Switch (ZCS) or two ways combine.But it is also deposited during realizing
Off state switch after certain problem, resonant stage establishes a very high voltage, when switch is connected again, deposits
The energy storage stored up in output capacitor will will cause sizable switching losses in high frequency and high voltage by switch discharge.Why
It is main points in practical application that sample solves these problems in circuit design.
Utility model content
The purpose of this utility model is that: solve off state of the current soft switch control circuit after resonant stage
Switch establish a very high voltage, when switch be connected again when, be stored in output capacitor energy storage will by switch discharge,
It will cause sizable switching losses in high frequency and high voltage, the effect of ON-OFF control circuit is less desirable, efficiency decline
The problem of, propose a kind of soft switch control circuit.
The technical solution adopted in the utility model is as follows:
A kind of soft switch control circuit is by the series resonant circuit topology formation based on zero voltage switch ZVS, circuit packet
Current rectifying and wave filtering circuit and inverter circuit are included, current rectifying and wave filtering circuit is connect with single phase alternating current power supply, the output end of current rectifying and wave filtering circuit
Connect inverter circuit, output end of the output end of inverter circuit as soft switch control circuit backend load circuit, wherein inversion
Circuit includes 4 switching devices, circuit connection are as follows: 2 are one group of series connection in 4 switching devices, and two groups of switching devices pass through
It is connected in parallel, two common ends that two groups of switching devices are connected in parallel are connected to the output end of current rectifying and wave filtering circuit, in first group
In the common end of concatenated switching device and second group between the common end of concatenated switching device according to current signal flow direction according to
It is secondary to be in series with a resistance, a capacitor and an inductance, in first group in the common end of concatenated switching device and second group
Output end of the common end of concatenated switching device as soft switch control circuit backend load circuit.
Further, the switching device uses power MOS pipe.
Further, the switching device is using the internal power MOS pipe for having shunt capacitance and parallel diode.
Further, the circuit of the current rectifying and wave filtering circuit is made of 4 rectifier diodes and a filter capacitor, and circuit connects
Be connected in: 2 are one group of series connection in 4 rectifier diodes, and two groups of rectifier diodes are by being connected in parallel, and two groups of rectifier diodes are simultaneously
Join two common ends filter capacitor in parallel of connection, the public affairs of two concatenated rectifier diodes in two groups of rectifier diodes
End connects single phase alternating current power supply as the input terminal of current rectifying and wave filtering circuit altogether, and the both ends of filter capacitor are as current rectifying and wave filtering circuit
Output end.
Further, the output end of the soft switch control circuit backend load circuit is also connected with a transforming circuit.
In conclusion by adopting the above-described technical solution, the beneficial effects of the utility model are:
1, in the utility model, inverter has reached the working condition of Sofe Switch, and the switching loss of system has obtained very big
Reduction in degree, overall efficiency significantly improve, according to the resonance of the high-frequency induction heating power of pulse density modulated (PDM) frequency
Rate setting reduces switching losses using zero voltage switch ZVS combination series resonant circuit topological structure with Power Regulation mode, solves
The off state switch after resonant stage of having determined establishes a very high voltage, when switch is connected again, is stored in output
The energy storage of capacitor will be by switch discharge, the problem of causing sizable switching losses in high frequency and high voltage.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by
Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other relevant attached drawings according to these attached drawings.
Fig. 1 is the utility model soft switch control circuit circuit diagram；
Fig. 2 is a certain moment load current signal waveform diagram of the utility model；
Fig. 3 is the utility model current rectifying and wave filtering circuit circuit diagram.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only to explain this
Invention is not used to limit the utility model, i.e., the described embodiments are only a part of the embodiments of the utility model, without
It is whole embodiments.The component of the utility model embodiment being usually described and illustrated herein in the accompanying drawings can with it is various not
With configuration arrange and design.
Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention provided in the accompanying drawings below
The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Reality based on the utility model
Apply example, those skilled in the art's every other embodiment obtained without making creative work belongs to
The range of the utility model protection.
It should be noted that the relational terms of term " first " and " second " or the like be used merely to an entity or
Operation is distinguished with another entity or operation, and without necessarily requiring or implying between these entities or operation, there are any
This actual relationship or sequence.Moreover, the terms "include", "comprise" or its any other variant be intended to it is non-exclusive
Property include so that include a series of elements process, method, article or equipment not only include those elements, but also
Further include other elements that are not explicitly listed, or further include for this process, method, article or equipment it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including described
There is also other identical elements in the process, method, article or equipment of element.
Feature and performance of the invention are described in further detail with reference to embodiments.
Embodiment 1
A kind of soft switch control circuit is by the series resonant circuit topology formation based on zero voltage switch ZVS, circuit packet
Current rectifying and wave filtering circuit and inverter circuit are included, current rectifying and wave filtering circuit is connect with single phase alternating current power supply, the output end of current rectifying and wave filtering circuit
Connect inverter circuit, output end of the output end of inverter circuit as soft switch control circuit backend load circuit, wherein inversion
Circuit includes 4 switching devices, circuit connection are as follows: 2 are one group of series connection in 4 switching devices, and two groups of switching devices pass through
It is connected in parallel, two common ends that two groups of switching devices are connected in parallel are connected to the output end of current rectifying and wave filtering circuit, in first group
In the common end of concatenated switching device and second group between the common end of concatenated switching device according to current signal flow direction according to
It is secondary to be in series with a resistance, a capacitor and an inductance, in first group in the common end of concatenated switching device and second group
Output end of the common end of concatenated switching device as soft switch control circuit backend load circuit.
The utility model circuit diagram as shown in Figure 1, in figure C0 be DC filter capacitor, by device for power switching Q1, Q2,
Q3, Q4 and antiparallel fast recovery diode D1, D2, D3, D4 constitute inverter circuit, L, C, and R is equivalent serial consonant load.Function
Rate switching device Q1, Q3 and Q2, Q4 are under the domination of driving pulse, periodic alternately on-off.Tandem circuit, which has, easily to be opened
The features such as dynamic, easy high frequency.
It is as follows that the no-voltage of this soft switch control circuit opens ZVS working condition:
Assuming that at a time load current signal waveform is as shown in Fig. 2, the t1 moment is current zero-crossing point, at this point, 1Q, 3Q
Pipe S-G voltage is that high level is open-minded, and 2Q, 4Q pipe S-G voltage are low level shutdown, if current direction is forward flow at this time, then
1Q, 3Q pipe D-S voltage are low level, and 2Q, 4Q pipe D-S voltage are high level.At the t2 moment, the shutdown of 1Q, 3Q low level, 2Q, 4Q drive
Dynamic voltage is still low level shutdown, and current direction keeps forward flow, and 2Q, 4Q are anti-and diode 2D, 4D open afterflow, at this time
1Q, 3Q pipe D-S voltage become high level, and 2Q, 4Q pipe are since by 2D, 4D short circuit, D-S voltage becomes low level.The t3 moment,
2Q, 4Q pipe G-S voltage are that high level is open-minded, and 1Q, 3Q pipe G-S voltage keep low level shutdown, and current direction is still positive, electric current
2D, 4D are still flowed through, 1Q, 3Q pipe D-S voltage keep high level at this time, and 2Q, 4Q pipe D-S voltage keep low level.The t4 moment, 2Q,
4Q pipe G-S voltage is that high level is open-minded, and the shutdown of 1Q, 3Q low level, load current is reversed, each metal-oxide-semiconductor D-S interpolar electricity in inverter
Pressure remains unchanged.T5 moment, 1Q, 3Q driving signal keep low level, and 2Q, 4Q pipe G-S voltage are low level shutdown, load current
Still be it is reversed, current stream is anti-by 1Q, 3Q at this time and diode 1D, 3D, 2Q, 4Q pipe D-S voltage are high level, 1Q, 3Q pipe
D-S voltage becomes low level.T6 moment, metal-oxide-semiconductor 1Q, 3Q conducting, 2Q, 4Q shutdown, electric current keep passing through the reversed afterflow of 1D, 3D,
1Q, 3Q pipe D-S voltage are low level at this time, and 2Q, 4Q pipe D-S voltage are high level.The Time-Series analysis of t7 moment is the same as the t1 moment.In conjunction with
The utility model circuit diagram Fig. 1 and analysis can be obtained when driving signal phase is ahead of load current phase, and system can satisfy
No-voltage opening state, to reduce switching loss.
Further, the switching device uses power MOS pipe.
Further, the switching device is using the internal power MOS pipe for having shunt capacitance and parallel diode.
Embodiment 2
On the basis of example 1, the circuit of the current rectifying and wave filtering circuit is whole by 4 for the utility model preferred embodiment
Diode and a filter capacitor composition being flowed, as shown in figure 3, circuit connection are as follows: 2 are one group of series connection in 4 rectifier diodes,
Two groups of rectifier diodes are by being connected in parallel, two common ends that two groups of rectifier diodes are connected in parallel filtered electrical in parallel
Hold, the common end of two concatenated rectifier diodes in two groups of rectifier diodes is connected as the input terminal of current rectifying and wave filtering circuit
Single phase alternating current power supply, output end of the both ends of filter capacitor as current rectifying and wave filtering circuit.The input of soft switch control circuit is enabled to believe
Number stabilization is met the requirements.
Further, the output end of the soft switch control circuit backend load circuit is also connected with a transforming circuit.It enables soft
The output signal of ON-OFF control circuit is more stable, and the scope of application is wider.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (5)
1. a kind of soft switch control circuit, it is characterised in that: be by the series resonant circuit topology structure based on zero voltage switch ZVS
At circuit includes current rectifying and wave filtering circuit and inverter circuit, and current rectifying and wave filtering circuit is connect with single phase alternating current power supply, current rectifying and wave filtering circuit
Output end connect inverter circuit, output end of the output end of inverter circuit as soft switch control circuit backend load circuit,
Wherein inverter circuit includes 4 switching devices, circuit connection are as follows: 2 are one group of series connection, two groups of switches in 4 switching devices
For device by being connected in parallel, two common ends that two groups of switching devices are connected in parallel are connected to the output end of current rectifying and wave filtering circuit,
Believe between the common end of concatenated switching device according to electric current in the common end of concatenated switching device and second group in first group
Number flow direction has been sequentially connected in series a resistance, a capacitor and an inductance, in first group the common end of concatenated switching device with
Output end of the common end of concatenated switching device as soft switch control circuit backend load circuit in second group.
2. a kind of soft switch control circuit according to claim 1, it is characterised in that: the switching device uses power
Metal-oxide-semiconductor.
3. a kind of soft switch control circuit according to claim 1 or 2, it is characterised in that: in the switching device uses
Portion has the power MOS pipe of shunt capacitance and parallel diode.
4. a kind of soft switch control circuit according to claim 1, it is characterised in that: the circuit of the current rectifying and wave filtering circuit
Be made of 4 rectifier diodes and a filter capacitor, circuit connection are as follows: in 4 rectifier diodes 2 be one group of series connection, two
Group rectifier diode is by being connected in parallel, two common ends that two groups of rectifier diodes are connected in parallel filter capacitor in parallel,
The common end of two concatenated rectifier diodes in two groups of rectifier diodes connects single as the input terminal of current rectifying and wave filtering circuit
Phase AC power source, output end of the both ends of filter capacitor as current rectifying and wave filtering circuit.
5. a kind of soft switch control circuit according to claim 1, it is characterised in that: the soft switch control circuit rear end
The output end of load circuit is also connected with a transforming circuit,
RC lagging circuit realizes the Sofe Switch (no-voltage is open-minded) of converter, and Switching Power Supply can be made to work in Sofe Switch state,
Improve efficiency and power density, and circuit the operation is stable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822147753.1U CN209105040U (en) | 2018-12-20 | 2018-12-20 | A kind of soft switch control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822147753.1U CN209105040U (en) | 2018-12-20 | 2018-12-20 | A kind of soft switch control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209105040U true CN209105040U (en) | 2019-07-12 |
Family
ID=67163060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822147753.1U Expired - Fee Related CN209105040U (en) | 2018-12-20 | 2018-12-20 | A kind of soft switch control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209105040U (en) |
-
2018
- 2018-12-20 CN CN201822147753.1U patent/CN209105040U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102611310B (en) | Magnetic integrated self-driving current-double rectification half-bridge three-level direct-current converter | |
| CN108900100B (en) | A kind of single-phase high efficiency high frequency isolated form rectifier | |
| CN111030440A (en) | Single-phase two-tube five-level rectifier based on hybrid H bridge | |
| CN110086360A (en) | A kind of five level high efficiency rectifiers | |
| CN107204717A (en) | A kind of Bridgeless boost type CUK pfc circuits | |
| CN212726850U (en) | Staggered parallel totem-pole bridgeless PFC circuit and power conversion device | |
| CN109149952A (en) | A kind of current-resonance type Sofe Switch recommends DC converter | |
| CN109586602A (en) | Auxiliary resonant pole T-type three-level soft switch inverter circuit and modulator approach | |
| CN103888010A (en) | High-frequency isolated type three-level inverter based on push-pull converter | |
| CN102611347A (en) | Single-phase non-isolated solar grid-connected inverter | |
| CN107565814A (en) | A kind of quasi- Z source switch boosting inverters of high-gain suitable for fuel cell power generation | |
| CN111835204B (en) | Zero-reflux power soft switch modulation method and converter of resonant double-active bridge | |
| CN108964505B (en) | T-shaped conversion circuit and corresponding three-phase conversion circuit and conversion device | |
| CN102545670A (en) | Novel power-level topological structure of micro inverter | |
| CN104682762A (en) | Low-leakage-current grid-connected inverter | |
| CN209105040U (en) | A kind of soft switch control circuit | |
| CN110165923A (en) | A kind of inverter circuit | |
| CN103683940B (en) | A kind of DC-DC transfer circuit, device and method of work | |
| CN106877728B (en) | Bidirectional power converter | |
| CN108964490B (en) | T-shaped conversion circuit and corresponding three-phase conversion circuit and conversion device | |
| CN108964489B (en) | T-shaped conversion circuit and corresponding three-phase conversion circuit and conversion device | |
| CN102082525A (en) | Quasi-resonant converter capable of limiting reverse recovery current | |
| CN106100314B (en) | A kind of three-phase crisscross parallel circuit of power factor correction | |
| CN110071651A (en) | A kind of non-isolation type boost inverter circuit of symmetrical configuration | |
| CN102437770A (en) | Single-phase half-bridge three-level inverter |
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: 20190712 Termination date: 20211220 |