CN103490606A - Power factor correction circuit with multiple sets of output voltages - Google Patents
Power factor correction circuit with multiple sets of output voltages Download PDFInfo
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- CN103490606A CN103490606A CN201210194909.6A CN201210194909A CN103490606A CN 103490606 A CN103490606 A CN 103490606A CN 201210194909 A CN201210194909 A CN 201210194909A CN 103490606 A CN103490606 A CN 103490606A
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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 relates to a power factor correction circuit with multiple sets of output voltages. The power factor correction circuit comprises a coupling inductor unit, a first output capacitor, a second output capacitor, a switch unit and a control unit. A first winding and a second winding of the coupling inductor unit generate a first power source and a second power source respectively through a rectification power source provided by a rectification filtering module, and switching on the switch unit is controlled through the control unit according to the second power source. Therefore, according to the power factor correction circuit, the plurality of output power sources can be directly provided, and the manufacturing cost of a next-stage direct current switching circuit is reduced.
Description
Technical field
The present invention relates to a kind of power supply unit, refer to that especially a kind of tool organizes the power factor correcting circuit of output voltage more.
Background technology
The electric equipment products of use diode rectification filter circuit cause power factor lower because of the electrical characteristic of its equivalence non-linear (Non-Linear) impedance, for example: 0.32, so can cause the apparent power of electric equipment products and commercial power supply effective power difference large than resistive load.Therefore in the electric product input, power factor correction circuit (Power Factor Correction circuit:PFC) must be set, to improve the power factor of electric equipment products.
Generally speaking, the Main Function of power factor correcting circuit is to eliminate the harmonic current different from the line voltage frequency (Harmonic Current), makes the load characteristic of electric equipment products be similar to the linear resistance load.And power factor correcting circuit generally adopts boosting type converter (Boost Converter) circuit, utilize the charge-discharge characteristic of boosting type converter reach high merit because of with low harmonic wave, the high-voltage power supply of single group times of supply frequency pulsation can be provided also so only, if, need further provide another to organize the power supply of different voltages, must connect again another direct current transducer, obtain High Power Factor and stable output voltage and electric current by the two-stage circuit transformational structure, and the power supply of extra different voltages is provided.So, power supply unit can be provided with a plurality of direct current transducer circuit, causes the circuit structure complexity, relatively, also can improve the cost of manufacture of circuit.
In view of this, the present invention proposes the power factor correcting circuit that a kind of tool is organized output voltage more, improves the problem of known power factor correcting circuit, without additionally setting up direct current transducer, can increase extra out-put supply, reduces the cost of manufacture of circuit.
Summary of the invention
Main purpose of the present invention, is to provide a kind of tool to organize the power factor correcting circuit of output voltage more, and the power converter of single-stage is exportable plural groups power supply, reduces the cost of manufacture of circuit.
The present invention is to provide the power factor correcting circuit that a kind of tool is organized out-put supply more, and it comprises a coupling inductance unit, one first output capacitance, one second output capacitance, a switch element and a control unit.The coupling inductance unit has one first winding and one second winding, rectification filtering module is the rectifying and wave-filtering input power and exports rectifier power source to the first winding, and produce the first power supply, and produce second source by second winding coupled the first winding, switch element is to couple the first winding, and the switching of control unit control switch unit according to second source.Therefore power factor correcting circuit of the present invention need not be set up the circuit of direct current transducer again, and another group out-put supply can additionally be provided, and reduces the circuit production cost.
The accompanying drawing explanation
The circuit diagram of the embodiment that Fig. 1 is power factor correcting circuit of the present invention.
[figure number is to as directed]
10 power factor correcting circuit 102 first rectification units
104 second rectification unit 11 rectification filtering modules
112 114 input filter unit, input rectifying unit
116 EMI filter unit 12 first inductance coupling high unit
122 first winding 124 second windings
126 zero current winding 13 auxiliary electrical source generating circuits
14 first output capacitance 16 second output capacitances
18 first switch element 20 control units
22 first partial pressure unit 222 resistance
224 resistance 24 light isolation feedback circuits
26 start units 261 start rectifier
262 start rectifier 263 resistance
264 resistance 265 filter capacitors
I
122the first electric current I
124the second electric current
I
zCDzero current signal OUT1 the first output
OUT2 the second output V
o1the first output voltage
V
o2the second output voltage V
aCaC power
V
sCfilter power supply V
cSPFCthe sensing signal
V
dCrectifier power source V
dETthe first dividing potential drop signal
Embodiment
For making that architectural feature of the present invention and the effect reached are had a better understanding and awareness, coordinate detailed explanation in order to preferred embodiment and accompanying drawing, be described as follows:
Refer to Fig. 1, the calcspar of its embodiment who is power factor correcting circuit of the present invention.As shown in the figure, power factor correcting circuit 10 of the present invention is to comprise a coupling inductance unit 12, one first output capacitance 14, one second output capacitance 16, a switch element 18 and a control unit 20, in addition, the power factor correcting circuit 10 of the present embodiment further comprises one first rectification unit 102 and one second rectification unit 104, and an auxiliary electrical source generating circuit 13, a partial pressure unit 22 and light isolation feedback circuit 24.Coupling inductance unit 12 comprises one first winding 122 and one second winding 124, and the present embodiment further comprises a zero current winding 126.In addition, partial pressure unit 22 has a resistance 222 and a resistance 224.
One end of the first winding 122 is to couple a rectification filtering module 11, to be coupled to an AC power VAC; The rectification filtering module 11 of the present embodiment is to comprise an input rectifying unit 112 and an input filter unit 114, in addition, the rectification filtering module 11 of the present embodiment more comprises an Electromagnetic Interference (EMI) filter unit 116, and wherein, EMI filter unit 116 is filtering AC power V
aCeMI, to transmit filter power supply V
sCto input rectifying unit 112, input rectifying unit 112 is by filter power supply V
sCthe rectifier power source V that rectification is times supply frequency
dC, be the DC power supply of high pulsating voltage, and reduced the high pulsating voltage of rectification unit 112 by input filter unit 114, and produce rectifier power source V
dCto the first winding 122, for the first winding 122 energy storage.Therefore, the first winding 122 represents one first electric current I of the first power supply because energy storage produces
122.The second winding 124 of coupling inductance unit 12 is coupling first windings 122, so the second winding 124 is according to the stored energy of the first winding 122 and corresponding one second electric current I that represents second source that produces
124.
The other end of the first winding 122 couples the first rectification unit 102 and switch element 18, the second winding is to be coupled to the second rectification unit 104, and the coupling inductance unit 12 of the present embodiment more is coupled to control unit 20 by zero current winding 126, and according to the stored energy of the first winding 122 and the corresponding zero current detection signal I that produces
zCD, for the stored energy of control unit 20 detecting the first winding 122.The first rectification unit 102 is that to be coupled to the first output capacitance 14, the second rectification units 104 be to be coupled to the second output capacitance 16; The first output capacitance 14 is according to the first electric current I after the first rectification unit 102 rectifications
122, and produce one first output voltage V at the first output OUT1
o1; The second output capacitance 16 is according to the second electric current I after the second rectification unit 104 rectifications
124, and produce one second output voltage V at the second output OUT2
o2.In addition, the power factor correcting circuit 10 of the present embodiment more produces a little energy work rate by auxiliary electrical source generating circuit 13 through zero current winding 126 and gives control unit 20.
The first switch element 18 is be coupled between coupling inductance unit 12 and one first sensing resistor RS and couple control unit 20, and the first sensing resistor RS more is coupled to control unit 20, with when the first switch element 18 conducting, according to the first electric current I
122produce one first sensing signal V
cSPFC.One end of partial pressure unit 22 is to couple the first output capacitance 14, and the other end of partial pressure unit 22 is to be coupled to ground connection, and by the resistance 222 of mutually series connection with resistance 224 and according to the first output voltage V
o1obtain one first dividing potential drop signal V
dET, and be sent to control unit 20.Control unit 20 is to be coupled between EMI filter unit 116 and input rectifying unit 112 through controlling rectification unit 26,26, to receive the input power V through EMI filtering
aC, control unit 20 is second output voltage V according to corresponding second source
o2, produce one with correspondence and control signal V
gto switch element 18, and the switching of control switch 18, and can be further according to input power V
aC, the first dividing potential drop signal V
dETand the zero current detection signal I of coupling sensing cell 12
zCDproduce this control signal V
g.In addition, light isolation feedback circuit 24 is to utilize optical isolator to isolate the first output voltage V
o1with the second output voltage V
o2the Voltage Reference level (), and the light of the present embodiment isolation feedback circuit 24 is to comprise an optical coupling unit (not shown), in order to according to this second output voltage V
o2produce a back coupling signal V
fBto control unit 20, for the switching signal V of control switch unit 18
g.
The second output voltage V due to power factor correcting circuit 10 of the present invention
o2be that the second winding 124 according to coupling inductance 12 produces, and be less than the first output voltage V
o1, therefore can obtain one by the step-down turn ratio design and can directly export electronic installation or other electric equipments that generally needs low pressure and isolation to, as the isolation low-voltage of small household appliances or light source device etc.
In addition, the control unit 20 of the present embodiment more couples a start unit 26, it is provided with two startup rectification units 261,262, two resistance 263,264 and a filter capacitor 265, wherein this two startups rectification unit the 261, the 262nd, be coupled to respectively between the EMI filter unit 116 and input rectifying unit 112 of this rectification filtering module 11, with this input power of rectification, exports a startup power supply to resistance 263,264; Resistance the 263, the 264th, start power supply and dividing potential drop according to this, that is resistance 263,264 forms a startup voltage divider, and start the dividing potential drop signal and export electric capacity 265 to according to this startup power generation one, to produce a startup energy and to export control unit 20 to, for starting control unit 20.
In sum, the present invention is the power factor correcting circuit that a kind of tool is organized out-put supply more, it provides the coupling inductance unit, it has the first winding and the second winding, to couple respectively the first output capacitance and the second output capacitance, increase exportable power supply, and, by being combined with DC-DC converter, further provide more multi-output power supply.
In sum, it is only preferred embodiment of the present invention, not be used for limiting scope of the invention process, all equalizations of doing according to the described shape of the claims in the present invention scope, structure, feature and spirit change and modify, and all should be included in claim scope of the present invention.
Claims (7)
1. a tool is organized the power factor correcting circuit of out-put supply more, it is characterized in that, it comprises:
One first coupling inductance unit, it has one first winding and one second winding, one end of this first winding couples a rectification filtering module, this rectification filtering module produces a rectifier power source according to an input power, this the first winding energy storage according to this rectifier power source, to produce one first power supply, this second winding is coupled according to this first winding, to produce a second source; And
One switch element, the one end couples this first winding; And a control unit, it couples this second winding and this switch element, this second source that this control unit produces according to this second winding and control the switching of this switch element.
2. power factor correcting circuit as claimed in claim 1, is characterized in that, more comprises:
One first output capacitance, it couples this first winding and one first output, and produces one first output voltage according to this first electric current; And
One second output capacitance, it couples this second winding and one second output, and produces one second output voltage according to this second electric current.
3. power factor correcting circuit as claimed in claim 1, it is characterized in that, wherein this first coupling inductance unit more comprises a zero current winding, it is coupled in this first winding, and couple this control unit, the zero current signal that this control unit more produces according to this zero current winding and control the switching of this switch element.
4. power factor correcting circuit as claimed in claim 1, is characterized in that, more comprises:
One partial pressure unit, the one end couples one first output capacitance, the other end of this partial pressure unit is coupled to ground connection, this partial pressure unit has one first resistance and one second resistance, this first resistance this second resistance of connecting, and one first output voltage that this first resistance and this second resistance are exported according to this first output capacitance produces a dividing potential drop signal to this control unit, this control unit is more controlled the switching of this switch element according to this dividing potential drop signal.
5. power factor correcting circuit as claimed in claim 1, is characterized in that, more comprises:
One first rectification unit, it couples between this first winding and this first output capacitance, and this first power supply of rectification; And
One second rectification unit, it couples between this second winding and this second output capacitance, and this second source of rectification.
6. power factor correcting circuit as claimed in claim 1, is characterized in that, wherein this rectification filtering module is to comprise:
One electromagnetic interference (EMI) filter unit, the EMI of its filtering one AC power and export an input power;
One input rectifying unit, it couples this EMI filter unit this input power of rectification, to export this rectifier power source; And
One input filter unit, it is coupled to the bridge rectifier unit, reduces the high pulsating voltage of rectification unit, with output through this rectifier power source of filtering the first winding to the coupling inductance unit.
7. power factor correcting circuit as claimed in claim 1, is characterized in that, more comprises:
Two start rectification units, couple this rectification filtering module, this input power of rectification and export a startup power supply;
One starts voltage divider, and it couples this two startups rectification unit, starts power generation one according to this and starts dividing potential drop signal output; And
One filter capacitor, it starts the dividing potential drop signal according to this and produces a startup energy to this control unit, to start this control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210194909.6A CN103490606A (en) | 2012-06-11 | 2012-06-11 | Power factor correction circuit with multiple sets of output voltages |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210194909.6A CN103490606A (en) | 2012-06-11 | 2012-06-11 | Power factor correction circuit with multiple sets of output voltages |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103490606A true CN103490606A (en) | 2014-01-01 |
Family
ID=49830625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210194909.6A Pending CN103490606A (en) | 2012-06-11 | 2012-06-11 | Power factor correction circuit with multiple sets of output voltages |
Country Status (1)
| Country | Link |
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| CN (1) | CN103490606A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253653A (en) * | 2015-06-09 | 2016-12-21 | 三垦电气株式会社 | Have improvement starts the power control module required |
| CN108880223A (en) * | 2018-06-28 | 2018-11-23 | 杭州益川电子有限公司 | A kind of PFC voltage follower circuit |
| CN109861530A (en) * | 2019-02-12 | 2019-06-07 | 深圳可立克科技股份有限公司 | A kind of fast energy transfer circuit and power supply |
Citations (4)
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| CN101340155A (en) * | 2007-07-06 | 2009-01-07 | 立锜科技股份有限公司 | Apparatus and method for improving light load effect of flyback voltage converter |
| CN201846229U (en) * | 2010-09-30 | 2011-05-25 | 冠捷投资有限公司 | Soft start circuit |
| CN202127535U (en) * | 2011-06-30 | 2012-01-25 | 海洋王照明科技股份有限公司 | Auxiliary power supply circuit and driving device for lamp |
| JP4899709B2 (en) * | 2006-08-09 | 2012-03-21 | 株式会社村田製作所 | Switching power supply device and electronic device |
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2012
- 2012-06-11 CN CN201210194909.6A patent/CN103490606A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4899709B2 (en) * | 2006-08-09 | 2012-03-21 | 株式会社村田製作所 | Switching power supply device and electronic device |
| CN101340155A (en) * | 2007-07-06 | 2009-01-07 | 立锜科技股份有限公司 | Apparatus and method for improving light load effect of flyback voltage converter |
| CN201846229U (en) * | 2010-09-30 | 2011-05-25 | 冠捷投资有限公司 | Soft start circuit |
| CN202127535U (en) * | 2011-06-30 | 2012-01-25 | 海洋王照明科技股份有限公司 | Auxiliary power supply circuit and driving device for lamp |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253653A (en) * | 2015-06-09 | 2016-12-21 | 三垦电气株式会社 | Have improvement starts the power control module required |
| CN106253653B (en) * | 2015-06-09 | 2019-07-23 | 三垦电气株式会社 | Power control device, three-circuit equipment, household electrical appliances and high voltage motorization household electrical appliances |
| CN108880223A (en) * | 2018-06-28 | 2018-11-23 | 杭州益川电子有限公司 | A kind of PFC voltage follower circuit |
| CN109861530A (en) * | 2019-02-12 | 2019-06-07 | 深圳可立克科技股份有限公司 | A kind of fast energy transfer circuit and power supply |
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| PB01 | Publication | ||
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Application publication date: 20140101 |