CN105099160B - Circuit of power factor correction - Google Patents
Circuit of power factor correction Download PDFInfo
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- CN105099160B CN105099160B CN201410199103.5A CN201410199103A CN105099160B CN 105099160 B CN105099160 B CN 105099160B CN 201410199103 A CN201410199103 A CN 201410199103A CN 105099160 B CN105099160 B CN 105099160B
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- power factor
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- 230000002146 bilateral effect Effects 0.000 claims abstract description 15
- 239000003990 capacitor Substances 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims 1
- 230000007935 neutral effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 6
- 238000004146 energy storage Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000003071 parasitic effect Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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Abstract
Circuit of power factor correction (1) of the present invention possesses：1st~the 3rd inductance (L1~L3)；The rectifier cell of the capacitance of bilateral switching element (SW), the 1st and the 2nd (C1, C2), the 1st and the 2nd (D1, D2).1st inductance (L1) is connected to one end (L) of AC power；Bilateral switching element (SW), is connected between the other end of the 1st inductance (L1) and the other end (N) of AC power.Between 1st inductance (L1) and load (C3), multiple capacitances are connected in parallel to.Circuit of power factor correction according to the present invention, can not only reduce rectifier bridge and be lost and can prevent surge current.
Description
Technical field
The present invention relates to a kind of circuit of power factor correction.
Background technology
As so-called boost power factor correction circuit existing circuit of power factor correction 100 as shown in Figure 1, its
AC-input voltage is converted into DC voltage by middle rectifier bridge 101, and is boosted to by booster circuit higher than input voltage
Appropriate voltage.In the circuit of power factor correction 100, when switching elements conductive, electric current flows through 2 diodes and 1
Metal-oxide-semiconductor.When switch element turns off, electric current flows through 3 diodes.Due to by bridge rectifier, so bottom line also will
By 2 diodes, off-energy during diode current flow cannot be ignored for the transfer efficiency of power supply entirety.
In addition, surge current becomes problem compared with conference during plant-grid connection, it is therefore desirable to suppresses the means of surge current.Such as figure
Shown in 1 arrow, even if metal-oxide-semiconductor turns off, since electric current flows through the larger electrolytic capacitor of capacitance, larger surge can be also produced
Electric current.Therefore, protection during output short-circuit is also necessary.Traditional surge current prevents circuit as shown in Fig. 2, in load
Front end is plus the structure in parallel with controlled switch 103 of resistance 104.When electric network source accesses, turn off controlled switch 103, from
And the resistance 104 in parallel with the controlled switch 103 is set to absorb surge current.After the stipulated time (such as a few tens of milliseconds), make
Controlled switch 103 turns on, so as to start the normal work of power factor correction circuit 100.But such circuit structure needs additionally
Controlled switch 103 and control the controlled switch 103 control circuit, cause the complication of circuit structure.
In addition, in circuit of power factor correction 200 as shown in Figure 3, the positive period of the alternating current of input is passing through two
Circulate in the path of pole pipe 201, switch element 203 carries out switch motion.The negative cycle of the alternating current of input is passing through two poles
Circulate in the path of pipe 202, switch element 204 carries out switch motion.It is still to bear positive period either in the alternating current of input
In the circulation path in cycle, using booster type converter form, the number of diodes of process reduces one, so as to change
Efficiency is higher.But the common-mode noise in the circuit is larger, moreover, surge current and output terminal shortcircuit when network voltage accesses
When safety issue still have (with reference to US6738274).
The content of the invention
In order to solve the above-mentioned technical problem the present invention is made, its object is to：Rectification can be reduced by providing one kind
Bridge is lost and prevents the circuit of power factor correction of surge current.
The circuit of power factor correction of the present invention, it is characterised in that possess：1st inductance, is connected to the AC power
One end；And bilateral switching element, it is connected between the other end of the 1st inductance and the other end of the AC power, institute
State between the 1st inductance and load, be connected in parallel to multiple capacitances, the circuit of power factor correction is also equipped with：2nd inductance and
3 inductance；And the 1st rectifier cell and the 2nd rectifier cell, the multiple capacitance include the 1st capacitance and the 2nd capacitance；1st electricity
One end of appearance is connected to the other end of the 1st inductance and one end of the bilateral switching element, the 1st capacitance it is another
End be connected to the 2nd inductance one end and the 1st rectifier cell one end, the other end of the 2nd inductance with it is described
The other end connection of AC power, one end of the 2nd capacitance are connected to the 1st electricity identically with the 1st capacitance
One end of the other end of sense and the bilateral switching element, the other end of the 2nd capacitance are connected to the one of the 3rd inductance
End and one end of the 2nd rectifier cell, the other end of the 2nd rectifier cell and the other end of the AC power
Connection, the other end of the 1st rectifier cell and the other end of the 3rd inductance are commonly connected to one end of the load,
The other end of 2nd rectifier cell is commonly connected to the other end of the load with the other end of the 2nd inductance.
According to the circuit of power factor correction of the invention described above, be able to can be prevented while diode losses are reduced
Surge current.
In addition, in the circuit of power factor correction of the present invention, alternatively, the bilateral switching element includes：1st switch member
Part, is connected to the another side of the 1st inductance；And the 2nd switch element, have and the 1st switch elements in series and pole
One end that property connects on the contrary, and the other end being connected with the other end of the AC power.Thereby, it is possible to use MOS-FET
As each switch element, while diode losses are reduced, surge current can be prevented.
In addition, in the circuit of power factor correction of the present invention, alternatively, the 1st switch element and the 2nd switch member
Part is MOS-FET.Thereby, it is possible to circuit of power factor correction low in energy consumption is made.
In addition, in the circuit of power factor correction of the present invention, the 1st inductance, the 2nd inductance and the 3rd electricity
It is at least mutually magnetically coupled more than both in sense.Thereby, it is possible to save coil method and element number, and body can be reduced
Product.
In addition, it is another object of the present invention to provide a kind of supply unit, it is characterised in that possesses from exchange
The exchange input rectifying of power supply and export any one above-mentioned circuit of power factor correction of DC voltage.
The effect of invention
Circuit of power factor correction according to the present invention, can not only reduce rectifier bridge and be lost and can prevent surge
Electric current.
Brief description of the drawings
Fig. 1 is a kind of circuit diagram for the circuit of power factor correction 100 for representing the prior art.
Fig. 2 is the circuit diagram for representing to prevent circuit plus surge in the circuit of power factor correction 100 shown in Fig. 1.
Fig. 3 is the circuit diagram for another circuit of power factor correction 200 for representing the prior art.
Fig. 4 is the circuit diagram of circuit of power factor correction 1 according to the present invention.
Fig. 5 is the circuit diagram of an example of circuit of power factor correction 1 according to the present invention.
Fig. 6 is the current path of the state 1 for an example for representing circuit of power factor correction 1 according to the present invention
Figure.
Fig. 7 is the current path of the state 2 for an example for representing circuit of power factor correction 1 according to the present invention
Figure.
Fig. 8 is the current path of the state 3 for an example for representing circuit of power factor correction 1 according to the present invention
Figure.
Fig. 9 is the current path of the state 4 for an example for representing circuit of power factor correction 1 according to the present invention
Figure.
Embodiment
Hereinafter, referring to the drawings, the mode for implementing the present invention is explained.
Fig. 4 is the circuit diagram of circuit of power factor correction 1 according to the present invention.As shown in figure 4, work(of the present invention
Rate factor correcting circuit 1 possesses：1st~the 3rd inductance L1~L3；Bilateral switching element SW, the 1st and the 2nd capacitance C1, C2, the 1st and
2nd rectifier cell (the 1st and the 2nd diode) D1, D2.One end of 1st inductance L1 is connected to one end L of AC power；Two-way opened
Element SW is closed, is connected between the other end of the 1st inductance L1 and the other end N of AC power.1st inductance L1 and load C 3 it
Between, it is connected in parallel to multiple capacitances.
In addition, one end of the 1st capacitance C1 is connected to the other end of the 1st inductance L1 and one end of bilateral switching element SW,
The other end of 1st capacitance C1 is connected to one end of the 2nd inductance L2 and the anode of the 1st rectifier cell D1, and the 2nd inductance L2's is another
End is connected with the other end N of AC power.
In addition, one end of the 2nd capacitance C2 is connected to the other end of the 1st inductance L1 and two-way identically with the 1st capacitance C1
One end of switch element SW, the other end of the 2nd capacitance C2 are connected to one end of the 3rd inductance L3 and the moon of the 2nd rectifier cell D2
Pole, the anode of the 2nd rectifier cell D2 and the other end N connections of AC power.
In addition, the other end of the cathode of the 1st rectifier cell D1 and the 3rd inductance L3 are commonly connected to the one of load C 3
End, the anode of the 2nd rectifier cell D2 and the other end of the 2nd inductance L2 are commonly connected to the other end of load C 3.
In addition, bilateral switching element SW can be made of various forms.Herein, as shown in the example of figure 5, preferably
The 2nd switch element S2 that the 1st the switch element S1 and MOS-FET that bilateral switching element SW is made of MOS-FET is formed is formed.It is excellent
Elect the other end that the 1st switch element S1 is connected to the 1st inductance L1 as；2nd switch element S2 has to connect with the 1st switch element S1
And one end for connecting of opposite polarity ground, and the other end being connected with the other end N of AC power.
Herein, the 2nd switch element S2 connect with the 1st switch element S1 and opposite polarity be connected and refer to：2nd switch element
S2 and the 1st switch element S1 is connected in series and the conducting direction of the parasitic diode of the 2nd switch element S2 (bypass diode)
It is opposite with the conducting direction of the parasitic diode of the 1st switch element S1.Setting in this way, in the 1st and the 2nd switch element
In the state of S1, S2 are closed, it can be ensured that electric current flows in the path beyond the 1st and the 2nd switch element S1, the tandem paths of S2
It is dynamic.
The operation principle of circuit of power factor correction 1 is introduced below in conjunction with Fig. 6~Fig. 9.
State 1：Fig. 6 is the figure of the current path of the state 1 for the example for representing circuit of power factor correction 1.Under the state,
Hot voltage L is both turned on higher than neutral voltage N, the 1st and the 2nd switch element S1, S2.The path of current flowing has the 1st electric current
Path and the 2nd current path.In 1st current path, electric current is flowed out from one end L of AC power, is opened via the 1st inductance L1, the 1st
Close element S1, the 2nd switch element S2 and flow into the other end N of AC power.In 1st current path, the 1st inductance L1 energy storage.
At the same time, in the 2nd current path, electric current is flowed out from the 1st capacitance C1, via the 1st switch element S1, the 2nd switch element S2,
2 inductance L2 and flow into the 1st capacitance C1.In 2nd current path, the 1st capacitance C1 electric discharges, the 2nd inductance L2 energy storage.
State 2：Fig. 7 is the figure of the current path of the state 2 for the example for representing circuit of power factor correction 1.Under the state,
Hot voltage L is turned off higher than neutral voltage N, the 1st and the 2nd switch element S1, S2.At this time, the path of current flowing equally has
There are the 1st current path and the 2nd current path.In 1st current path, electric current is flowed out from one end L of AC power, via the 1st electricity
Sense L1, the 1st capacitance C1, the 1st rectifier cell D1, load C 3 and flow into the other end N of AC power.In 1st current path,
The electric charge that the 1st inductance L1 is stored in during switching elements conductive is discharged, and is charged to the 1st capacitance C1.At the same time, the 2nd electric current
In path, electric current is flowed out from the 2nd inductance L2, and the 2nd inductance L2 is flowed into via the 1st rectifier cell D1, load C 3.2nd electric current
In path, the charge discharge in the 2nd inductance L2 will be stored in.
Above-mentioned action and commonly referred to as Sepic converters (single ended primary inductor
Converter type of voltage step-up/down converter) is similar, can export the appropriate voltage after boost or being depressured.Also,
In the state 1 and 2 of half periods of the above-mentioned hot voltage L higher than neutral voltage N, the 1st and the 2nd switch member of two-way switch is formed
Part S1, S2 can be in high speed switching state at the same time.Its switching frequency for example can be the MHz of several kHz~hundreds of.That is, above-mentioned
In half periods of the hot voltage L higher than neutral voltage N, the conducting of switch element is carried out with turning off by common control unit
Control, so that frequency error factor state 1 and state 2 with the MHz of for example several kHz~hundreds of.In addition, utilizing two pole of MOS-FET bodies
In the case of pipe, in state 1, the 1st switch element S1 must be turned on, and the 2nd switch element S2 can be appointing on, off
Meaning state.And in state 2, the 1st switch element S1 must be turned off, and the 2nd switch element S2 can be any of on, off
State.
State 3：Fig. 8 is the figure of the current path of the state 3 for the example for representing circuit of power factor correction 1.Under the state,
Hot voltage L is both turned on less than neutral voltage N, the 1st and the 2nd switch element S1, S2.At this time, the path of current flowing equally has
There are the 1st current path and the 2nd current path.In 1st current path, electric current is flowed out from the other end N of AC power, via the 2nd
Switch element S2, the 1st switch element S1, the 1st inductance L1 and flow into one end L of AC power.In 1st current path, the 1st
Inductance L1 energy storage.At the same time, in the 2nd current path, electric current is flowed out from the 2nd capacitance C2, via the 3rd inductance L3, load C 3,
2 switch element S2, the 1st switch element S1 and flow into the 2nd capacitance C2.In 2nd current path, the 2nd capacitance C2 electric discharges, the 3rd electricity
Feel L3 energy storage.
State 4：Fig. 9 is the figure of the current path of the state 4 for the example for representing circuit of power factor correction 1.Under the state,
Hot voltage L is turned off less than neutral voltage N, the 1st and the 2nd switch element S1, S2.At this time, the path of current flowing equally has
There are the 1st current path and the 2nd current path.In 1st current path, electric current is flowed out from the other end N of AC power, via the 2nd
Rectifier cell D2, the 2nd capacitance C2, the 1st inductance L1 and flow into one end L of AC power.In 1st current path, switch element
The electric charge that the 1st inductance L1 is stored in during conducting is discharged, and is charged to the 2nd capacitance C2.At the same time, in the 2nd current path, electricity
Stream is flowed out from the 3rd inductance L3, and the 3rd inductance L3 is flowed into via load C 3, the 2nd rectifier cell D2., will in 2nd current path
The charge discharge being stored in the 3rd inductance L3.
Above-mentioned action and the type of voltage step-up/down converter of commonly referred to as Cuk converter are similar, can export and be boosted
Or the appropriate voltage after decompression.Also, in the state 3 and 4 of half periods of the above-mentioned hot voltage L less than neutral voltage N,
The the 1st and the 2nd switch element S1 of two-way switch is formed, S2 can be in high speed switching state at the same time.Its switching frequency for example may be used
Think the MHz of several kHz~hundreds of.That is, in half periods of the above-mentioned hot voltage L less than neutral voltage N, the conducting of switch element
It is controlled with turning off by common control unit, so that frequency error factor state 3 and shape with the MHz of for example several kHz~hundreds of
State 4.In addition, in the case of using MOS-FET body diodes, in state 3, the 2nd switch element S2 must be turned on, and the 1st
Switch element S1 can be the free position of on, off.And in state 4, the 2nd switch element S2 must be turned off, and the 1st opens
Close the free position that element S1 can be on, off.
The circuit of power factor correction 1 of the present invention, as shown in the table, the quantity for the diode that electric current is passed through is few, with showing
Some circuit of power factor correction 100 are compared, and transfer efficiency improves.
In addition, the switching frequency of the 1st and the 2nd switch element S1, S2 are determined according to being actually needed.Work as switching frequency
In the case of very big, inductance and capacitance can be set very little, so that the volume of circuit of power factor correction can be set
Very little, is conducive to minimize.But due to the 1st and the 2nd switch element S1, the switching frequency of S2 is big, in the 1st and the 2nd switch member
The drive loss of part S1, S2 can also become larger, so as to cause efficiency to reduce.Therefore, in the volume of balance circuit of power factor correction
In the case of efficiency, the 1st and the 2nd switch element S1, the switching frequency of S2 can be set appropriately.
Furthermore it is preferred that the 1st and the 2nd switch element S1, S2 MOS-FET.Thereby, it is possible to power low in energy consumption is made
Factor correcting circuit.Furthermore it is preferred that bilateral switching element SW is made of 2 MOS-FET.Thus, can also be made low in energy consumption
Circuit of power factor correction.
Furthermore it is preferred that being at least mutually coupled more than both in the 1st~the 3rd inductance L1~L3.Thereby, it is possible to save
Coil method and element number, and reduce volume.
In addition, the 1st and the 2nd capacitance C1, C2 can complete circuit function using relatively low capacitance, can carry out small-sized
Change.Also, the inflow of surge current larger in power grid can be prevented by the two small capacitances.
Circuit of power factor correction 1 according to the present invention, can carry out buck, the power under various input/output conditions
The output voltage of factor correcting circuit can be adjusted with most suitable operating state.Can protection power source device prevent that surge is electric
Stream, output short-circuit etc., so that safe.It is efficient, common-mode noise is few, current detecting is easy also, loss is few.
Although being illustrated above in association with drawings and examples to the present invention, it will be appreciated that described above
The invention is not limited in any way.Those skilled in the art without departing from the true spirit and scope of the present invention may be used
To be deformed and be changed to the present invention as needed, these deformations and change are within the scope of the present invention.For example, implement
Diode is listed as rectifier cell in mode, but the element that other can also be used to be capable of rectification.
Claims (5)
- A kind of 1. circuit of power factor correction, it is characterised in thatPossess：1st inductance, is connected to one end of AC power；AndBilateral switching element, is connected between the other end of the 1st inductance and the other end of the AC power,Between 1st inductance and load, multiple capacitances are connected in parallel to,The circuit of power factor correction is also equipped with：2nd inductance and the 3rd inductance；And1st rectifier cell and the 2nd rectifier cell,The multiple capacitance includes the 1st capacitance and the 2nd capacitance；One end of 1st capacitance is connected to the other end of the 1st inductance and one end of the bilateral switching element, described The other end of 1st capacitance is connected to one end of the 2nd inductance and one end of the 1st rectifier cell,The other end of 2nd inductance is connected with the other end of the AC power,Also, one end of the 2nd capacitance is connected to the other end and the institute of the 1st inductance identically with the 1st capacitance State one end of bilateral switching element, the other end of the 2nd capacitance is connected to one end of the 3rd inductance and described 2nd whole One end of fluid element,The other end of 2nd rectifier cell is connected with the other end of the AC power,The other end of 1st rectifier cell and the other end of the 3rd inductance are commonly connected to one end of the load,The other end of 2nd rectifier cell is commonly connected to the other end of the load with the other end of the 2nd inductance,The both ends of the load are connected with capacitor.
- 2. circuit of power factor correction as claimed in claim 1, it is characterised in thatThe bilateral switching element includes：1st switch element, is connected to the other end of the 1st inductance；And2nd switch element, has the one end being connected with the 1st switch elements in series and opposite polarity, and is exchanged with described The other end of the other end connection of power supply.
- 3. the circuit of power factor correction as described in claim 2, it is characterised in that1st switch element and the 2nd switch element are MOS-FET.
- 4. the circuit of power factor correction as described in any one in claims 1 to 3, it is characterised in thatIt is at least mutually magnetically coupled more than both in 1st inductance, the 2nd inductance and the 3rd inductance.
- A kind of 5. supply unit, it is characterised in thatPossess the exchange input rectifying from AC power and export described in the Claims 1 to 4 any one of DC voltage Circuit of power factor correction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410199103.5A CN105099160B (en) | 2014-05-12 | 2014-05-12 | Circuit of power factor correction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410199103.5A CN105099160B (en) | 2014-05-12 | 2014-05-12 | Circuit of power factor correction |
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| CN105099160B true CN105099160B (en) | 2018-04-24 |
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| CN114267972B (en) | 2021-11-30 | 2024-08-23 | 杭州云电科技能源有限公司 | Synchronous rectifying assembly, manufacturing method thereof and power supply |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066873A (en) * | 2013-01-21 | 2013-04-24 | 福州大学 | Novel voltage reduction type bridgeless Cuk power factor correction (PFC) circuit |
| CN203339977U (en) * | 2013-06-19 | 2013-12-11 | 华南理工大学 | A BUCK-BUCK-BOOST Bridgeless Converter |
| JP2014007875A (en) * | 2012-06-25 | 2014-01-16 | Sharp Corp | Switching power supply device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI384736B (en) * | 2009-07-15 | 2013-02-01 | Delta Eletronics Inc | Bridgeless pfc circuit system having current sensing circuit and method thereof |
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2014
- 2014-05-12 CN CN201410199103.5A patent/CN105099160B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014007875A (en) * | 2012-06-25 | 2014-01-16 | Sharp Corp | Switching power supply device |
| CN103066873A (en) * | 2013-01-21 | 2013-04-24 | 福州大学 | Novel voltage reduction type bridgeless Cuk power factor correction (PFC) circuit |
| CN203339977U (en) * | 2013-06-19 | 2013-12-11 | 华南理工大学 | A BUCK-BUCK-BOOST Bridgeless Converter |
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