CN105375751A - Passive soft handover circuit of power factor corrector - Google Patents
Passive soft handover circuit of power factor corrector Download PDFInfo
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- CN105375751A CN105375751A CN201410406247.3A CN201410406247A CN105375751A CN 105375751 A CN105375751 A CN 105375751A CN 201410406247 A CN201410406247 A CN 201410406247A CN 105375751 A CN105375751 A CN 105375751A
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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 invention brings forward a passive soft handover circuit of a power factor corrector. The passive soft handover circuit comprises a power input end, a first inductor, a first diode, a power output end, a power switch, and a buffer circuit. One end of the first inductor is coupled to the power input end. The positive end of the first diode is coupled to the other end of the first inductor. The power output end is coupled to the negative end of the first diode. The buffer circuit is coupled to the power switch. Through the design of the buffer circuit, phase alternative displacement is conducted on waveforms of voltages and currents, so the switch loss is minimized.
Description
Technical field
The invention relates to a kind of power factor corrector, and relate to a kind of power factor corrector applying to the tool soft-switching circuit of continuous conduction mode especially.
Background technology
Along with progress and the expanding economy of science and technology, the demand of the mankind to switch type converter grows with each passing day.In recent years, due to the significantly progress of power electronic technology, most future development also tending to compactization electronic equipment day, the power supply changeover device of its inside also need design towards compact trend, therefore, have that volume is little, lightweight, just to replace conventional linear be gradually transducer to the switch type power converter of efficiency advantages of higher, becomes the main flow of power supply changeover device.Switch type converter is except the short and small advantage such as frivolous, and a nearlyer step improves converter efficiency and quality.
At power factor corrector (powerfactorcorrector, PFC) common operator scheme has continuous conduction mode (continuousconductionmode, CCM), discontinuous conduction mode (discontinuousconductionmode, DCM).With low power system, the normal method realizing power factor corrector adopts discontinuous conduction mode to control switch mode.Otherwise, when higher-wattage demand, usually can change and adopt continuous conduction mode.
Generally speaking, if the boosting type converter of tradition continuous conduction mode operates in hard handoff, produce with the loss having energy during conducting when power switch disconnects, it is mainly owing to disconnecting with caused by the voltage of conducting moment and current slow, and this is switch cost.And the mode mainly solved utilizes external circuit by the waveform generation phase cross-over displacement of voltage and electric current, so that reduce switch cost.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of passive type soft-switching circuit of power factor corrector, utilizes external circuit by the waveform generation phase cross-over displacement of voltage and electric current, so that reduce switch cost.
For reaching above-mentioned or other object, the present invention proposes a kind of passive type soft-switching circuit of power factor corrector, it includes a power input end, one first inductance, its one end and this power input end couples, one first diode, the other end of its anode and this first inductance couples, a power output end, the negative terminal of itself and this first diode couples, a power switch and a buffer circuit, and itself and this power switch couples.Wherein, utilize the circuit design of buffer circuit by the waveform generation phase cross-over displacement of voltage and electric current, so that reduce switch cost.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of present pre-ferred embodiments.
Fig. 2 to Fig. 9 is the circuit start sequential flow chart of the preferred embodiment of the present invention.
Embodiment
For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and coordinate institute's accompanying drawings, be described in detail below.
Refer to shown in Fig. 1 to Fig. 9, it is circuit diagram and the circuit start sequential flow chart of present pre-ferred embodiments.The present invention proposes a kind of passive type soft-switching circuit of power factor corrector, and it includes a power input end (10), a power output end (11), one first inductance (12), one first diode (13), a power switch (14), one the 3rd electric capacity (15), one the 4th electric capacity (16) and a buffer circuit (20).
This power input end (10) couples with one end of this first inductance (12), and the 3rd electric capacity (15) can be coupled between this power input end (10) and this first inductance (12).The anode of this first diode (13) and the other end of this first inductance (12) couple, the negative terminal of this first diode (13) then couples with this power output end (11), and the 4th electric capacity (16) to be coupled to this power output end (11) front.
This buffer circuit (20) and this power switch (14) couple, and this buffer circuit (20) includes one second inductance (21), one first electric capacity (22), one second diode (23), one the 3rd diode (24), one second electric capacity (25) and one the 4th diode (26).And this power switch (14) can be the assembly of metal-oxide half field effect transistor or other equivalence.
One end of this second inductance (21) is coupled between this first inductance (12) and this first diode (13), and the other end of this second inductance (21) is then coupled to this power switch (14).This end of this second inductance (21) also couples with one end of this first electric capacity (22), the anode of this second diode (23) is coupled to the other end of this first electric capacity (22), and the negative terminal of this second diode (23) is coupled between this first diode (13) and the defeated end of this electric power (11).The anode of the 3rd diode (24) is coupled between this second inductance (21) and this power switch (14), one end of this second electric capacity (25) is coupled to the negative terminal of the 3rd diode (24), and the other end of this second electric capacity (25) is coupled to the negative terminal same equipotential circuit place with this second diode (23).The anode of the 4th diode (26) is coupled between the 3rd diode (24) and this second electric capacity (25), and the negative terminal of the 4th diode (26) is coupled between this first electric capacity (22) and this second diode (23).
The aforementioned annexation that each correlation unit is first described, below then will describe its operation.First, this power input end (10) can provide the source of electric power, and the 3rd electric capacity (15) can provide effect of filtering.When power switch (14) presents closed condition, after the electric power that this power input end provided first directly is supplied to this first inductance (12) and this first diode (13), directly electric power is exported by this power output end (11), and the 4th electric capacity (16) is charged simultaneously.
When this power switch (14) presents opening, the electric power that this power input end (10) provides will have part and flow through this second inductance (21) and this power switch (14), relative current starts decline (in a switch periods, input current supposition is constant) through the electric current of the first diode (13).The electric power that last power input end (10) provides will all flow through this second inductance (21) and this power switch (14), and now the 4th electric capacity (16) will discharge, electric power of its electric discharge sequentially will flow through this second electric capacity (25), the 4th diode (26), this first electric capacity (22), this second inductance (21) and finally by this power switch (14), and this first electric capacity (22) and this second electric capacity (25) store electric power because of the 4th electric capacity (16) electric discharge.And after the 4th electric capacity (16) exhausts stored electric power, the electric power that this power input end (10) provides all will flow through this second inductance (21) and this power switch (14).
When and then this power switch (14) being closed, first the electric power that this first inductance (12) provides sequentially will flow through this second inductance (21), the 3rd diode (24) and this second electric capacity (25), and the electric power of this second inductance (21) sequentially will flow through the 3rd diode (24), the 4th diode (26) and this first electric capacity (22) to be rendered as a recurrent state.And now this first electric capacity (22) is charged state, and this second electric capacity (25) is discharge condition.Then, after the lasting charging of this first electric capacity (22), when making the potential state of the current potential of the negative terminal of the 4th diode (26) higher than anode, the electric power that this first inductance (12) provides sequentially will flow through this first electric capacity (22) and this second diode (23), and the electric power of this second inductance (21) sequentially will flow through the 3rd diode (24) and this second electric capacity (25), now this first electric capacity (22) and this second electric capacity (25) will be all be rendered as discharge condition.
Moreover this second electric capacity (25) is because the first electric capacity (22) is more Zao discharges than this, therefore this second electric capacity (25) will be rendered as off state early than this first electric capacity (22).Therefore, when this second electric capacity (25) is rendered as off state, the electric power that this first inductance (12) provides sequentially will flow through this first electric capacity (22) and this second diode (23), and the electric power of this second inductance (21) then sequentially will flow through the 3rd diode (24), the 4th diode (26) and this second diode (23).Then, this second inductance (21) cannot continue to provide electric power again, therefore the electric power that only this first inductance (12) surplus provides sequentially will flow through this first electric capacity (22) and this second diode (23), and this first electric capacity (22) is now continuously discharge condition, after this first electric capacity (22) cannot provide electric power, then return back to initial condition.
The explanation of above, the present invention effectively by electric current waveform its corresponding waveform generation phase cross-over displacement in the time switched with voltage, and can reach the function of soft handover, and then reduces the loss because of energy during switching.
Although the present invention discloses as above with preferred embodiment; so itself and be not used to limit the present invention, anyly have the knack of this those skilled in the art, without departing from the spirit and scope of the present invention; when doing a little change and retouching, therefore protection scope of the present invention is worked as is that the scope that claim defines is as the criterion.
Claims (4)
1. a passive type soft-switching circuit for power factor corrector, is characterized in that this circuit comprises:
One power input end;
One first inductance, its one end and this power input end couple;
One first diode, the other end of its anode and this first inductance couples;
One power output end, the negative terminal of itself and this first diode couples;
One power switch;
One buffer circuit, itself and this power switch couples, and this buffer circuit includes,
One second inductance, its one end is coupled between this first inductance and this first diode, and its other end is coupled to this power switch
One first electric capacity, its one end is coupled to this end of this second inductance;
One second diode, its anode is coupled to the other end of this first electric capacity, and negative terminal is coupled between this first diode and this power output end;
One the 3rd diode, its anode is coupled between this second inductance and this power switch;
One second electric capacity, its one end is coupled to the negative terminal of the 3rd diode, and the other end is coupled to the negative terminal same place with this second diode; And
One the 4th diode, its anode is coupled between the 3rd diode and this second electric capacity, and negative terminal is coupled between this first electric capacity and this second diode.
2. the passive type soft-switching circuit of power factor corrector as claimed in claim 1, is characterized in that this power switch is a metal-oxide half field effect transistor.
3. the passive type soft-switching circuit of power factor corrector as claimed in claim 2, it is characterized in that this circuit has one the 3rd electric capacity further, the 3rd electric capacity is coupled between this power input end and this first inductance.
4. the passive type soft-switching circuit of power factor corrector as claimed in claim 3, is characterized in that this circuit has one the 4th electric capacity further, before the 4th electric capacity is coupled to this power output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410406247.3A CN105375751B (en) | 2014-08-13 | 2014-08-13 | The passive type soft-switching circuit of power factor corrector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410406247.3A CN105375751B (en) | 2014-08-13 | 2014-08-13 | The passive type soft-switching circuit of power factor corrector |
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| Publication Number | Publication Date |
|---|---|
| CN105375751A true CN105375751A (en) | 2016-03-02 |
| CN105375751B CN105375751B (en) | 2019-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410406247.3A Active CN105375751B (en) | 2014-08-13 | 2014-08-13 | The passive type soft-switching circuit of power factor corrector |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6169671B1 (en) * | 2000-04-21 | 2001-01-02 | Lucent Technologies Inc. | Snubber circuit for a power switch and recitifying diode and power converter employing the same |
| US20080191679A1 (en) * | 2006-01-26 | 2008-08-14 | Advanced Analogic Technologies, Inc. | High-Frequency Buck Converter that Includes a Cascode MESFET-MOSFET Power Switch |
| CN201207616Y (en) * | 2008-05-08 | 2009-03-11 | 全汉企业股份有限公司 | Feedback converter having active damped circuit |
| US7508185B2 (en) * | 2006-08-03 | 2009-03-24 | Spi Electronic Co., Ltd. | Simple zero current switch circuit |
-
2014
- 2014-08-13 CN CN201410406247.3A patent/CN105375751B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6169671B1 (en) * | 2000-04-21 | 2001-01-02 | Lucent Technologies Inc. | Snubber circuit for a power switch and recitifying diode and power converter employing the same |
| US20080191679A1 (en) * | 2006-01-26 | 2008-08-14 | Advanced Analogic Technologies, Inc. | High-Frequency Buck Converter that Includes a Cascode MESFET-MOSFET Power Switch |
| US7508185B2 (en) * | 2006-08-03 | 2009-03-24 | Spi Electronic Co., Ltd. | Simple zero current switch circuit |
| CN201207616Y (en) * | 2008-05-08 | 2009-03-11 | 全汉企业股份有限公司 | Feedback converter having active damped circuit |
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| Publication number | Publication date |
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| CN105375751B (en) | 2019-06-14 |
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