CN102751890A - Alternating-current rectification circuit and power circuit using same - Google Patents
Alternating-current rectification circuit and power circuit using same Download PDFInfo
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- CN102751890A CN102751890A CN2011100962313A CN201110096231A CN102751890A CN 102751890 A CN102751890 A CN 102751890A CN 2011100962313 A CN2011100962313 A CN 2011100962313A CN 201110096231 A CN201110096231 A CN 201110096231A CN 102751890 A CN102751890 A CN 102751890A
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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 provides an alternating-current (AC) rectification circuit, comprising a first diode, a second diode, a first transistor, a second transistor, a third transistor, and a fourth transistor. Each diode comprises an anode and a cathode, and each transistor comprises a first end, a second end, and a control end controlling on and off of the first end and the second end. The anodes of the first diode and the second diode are connected. The cathode of the first diode is connected with the first end of the first transistor and the second end of the third transistor, and the cathode of the second diode is connected with the first end of the second transistor and the second end of the fourth transistor. The second end of the first transistor is connected with the anode of the second diode and the first end of the fourth transistor, and the second end of the second transistor is connected with the anode of the first diode and the first end of the third transistor. The anodes of the first diode and the second diode are AC input ends, and the cathodes of the first diode and the second diode are AC output ends. In addition, the invention also provides a power circuit using the AC rectification circuit.
Description
Technical field
The present invention relates to a kind of rectification circuit, particularly a kind of ac rectifier and use the power circuit of this ac rectifier.
Background technology
Traditional interchange full bridge rectifier is used for the offset of sinusoidal alternating current and carries out halfwave rectifier, and it is made up of first to fourth diode; The negative electrode of wherein said first diode is connected with the negative electrode of the 4th diode; The negative electrode of said second diode is connected with the anode of first diode; The anode of said the 3rd diode is connected with the anode of second diode, and the anode of said the 4th diode is connected with the negative electrode of the 3rd diode.First, second input of this rectification circuit is connected with the anode of first diode and the negative electrode of the 3rd diode respectively, and first, second output of this rectification circuit is connected with the anode of second diode and the negative electrode of the 4th diode respectively.
Yet because diode has certain conducting voltage; For example; 0.4V electric energy loss is 4W when the electric current of 10A flows through this diode, if be not optimized exchanging full bridge rectifier; Four diodes in the interchange full bridge rectifier will cause the electric energy loss of 16W at least in switching process, be unfavorable for energy-saving and emission-reduction.
Summary of the invention
In view of this, be necessary to provide a kind of power circuit that can improve the ac rectifier of electric energy conversion efficiency and use this ac rectifier.
A kind of ac rectifier; It comprises first, second diode and first, second, third, fourth transistor; Each diode all comprises an anode and a negative electrode, and each transistor comprises that all one first end, one second end and are used to control the control end of the break-make of first end and second end; The anode of said first diode is connected with the anode of second diode; The negative electrode of this first diode is connected with the 3rd transistorized second end with first end of the first transistor; The negative electrode of this second diode is connected with the 4th transistorized second end with first end of transistor seconds; Second end of this first transistor is connected with the anode of second diode and the 4th transistorized first end; Second end of this transistor seconds is connected with the anode of first diode and the 3rd transistorized first end; The anode of this first, second diode is two alternating current inputs, and the negative electrode of this first, second diode is two alternating current outputs; In the positive half period of alternating current, control said the first, the 4th transistor and open; In the negative half-cycle of alternating current, control said second, third transistor and open.
A kind of power circuit, it comprises anti-clutter circuit, ac rectifier, transformer, direct current rectification circuit and controller; Said ac rectifier comprises two alternating current inputs and two alternating current outputs; Said anti-clutter circuit is connected between the ac input end of an AC power and ac rectifier, and said transformer comprises primary coil that is connected with the ac output end of ac rectifier and the secondary coil that is connected with the direct current rectification circuit; Said ac rectifier comprises first, second diode and first, second, third, fourth transistor; Each diode all comprises an anode and a negative electrode, and each transistor comprises that all one first end, one second end and are used to control the control end of the break-make of first end and second end; Said controller is connected with each transistorized control end respectively; The anode of said first diode is connected with the anode of second diode; The negative electrode of this first diode is connected with the 3rd transistorized second end with first end of the first transistor; The negative electrode of this second diode is connected with the 4th transistorized second end with first end of transistor seconds; Second end of this first transistor is connected with the anode of second diode and the 4th transistorized first end; Second end of this transistor seconds is connected with the anode of first diode and the 3rd transistorized first end; The anode of this first, second diode is two alternating current inputs, and the negative electrode of this first, second diode is two alternating current outputs; In the positive half period of alternating current, said controller is controlled said the first, the 4th transistor and is opened; In the negative half-cycle of alternating current, said second, third transistor of said controller control is opened.
Power circuit provided by the invention effectively reduces the efficiency losses of whole power circuit, thereby has effectively practiced thrift electric energy through in ac rectifier, adopting the lower transistor of a plurality of efficiency losses.
Description of drawings
Fig. 1 is the circuit diagram of the power circuit that provides of embodiment of the present invention.
Fig. 2 is the equivalent circuit diagram of power circuit when the positive half period of alternating current among Fig. 1.
Fig. 3 is the equivalent circuit diagram of power circuit when the negative half-cycle of alternating current among Fig. 1.
The main element symbol description
| |
100 |
| |
10 |
| Fuse | F1 |
| Differential mode inductance | L1 |
| The first front end input | L11 |
| The second front end input | L12 |
| The first rear end output | L21 |
| The second rear end output | L22 |
| AC power | |
| Ac rectifier | |
| 20 | |
| The alternating |
21 |
| The alternating |
22 |
| First diode | BD1 |
| Second diode | BD2 |
| The first transistor | Q1 |
| Transistor seconds | Q2 |
| The 3rd transistor | Q3 |
| The 4th transistor | Q4 |
| The 5th transistor | Q5 |
| The 6th transistor | Q6 |
| First electric capacity | CX1 |
| Second electric capacity | CX2 |
| The 3rd electric capacity | CX3 |
| First polar capacitor | C1 |
| Second polar capacitor | C2 |
| Transformer | T1 |
| Primary coil | Ta |
| First primary output terminal | Ta1 |
| Second primary output terminal | Ta2 |
| Secondary coil | Tb |
| First secondary output end | Tb1 |
| The second subprime output | Tb2 |
| For the third time the level output | Tb3 |
| The direct |
30 |
| The 7th transistor | Q7 |
| The 8th transistor | Q8 |
| The 9th transistor | Q9 |
| The tenth transistor | Q10 |
| The 11 transistor | Q11 |
| Differential mode inductance | L2 |
| The 3rd polar capacitor | C3 |
| Soft switched | L3 |
| Controller | |
| 40 | |
| First end | S |
| Second end | D |
| Control end | G1、G2、G3、G4、G5、G6、G7、G8、G9、G10、G11 |
Following embodiment will combine above-mentioned accompanying drawing to further specify the present invention.
Embodiment
As shown in Figure 1, be a kind of power circuit 100 that embodiment of the present invention provides, it comprises an anti-clutter circuit 10, an ac rectifier 20, a transformer T1, a direct current rectification circuit 30 and a controller 40.
Said anti-clutter circuit 10 comprises fuse F1, differential mode inductance L1 and three electric capacity.Said differential mode inductance L1 comprises one first front end input L11, one second front end input L12, one first rear end output L21 and one second rear end output L22.The said first front end input L11 is through a capacity earth, and the said second front end input L12 is through a capacity earth, is connected an electric capacity between the said first front end input L11 and the second front end input L12.Insert an AC power Vac between the said first front end input L11 and the second front end input L12, said fuse F1 is connected between the first front end input L11 and the said AC power Vac.
Said ac rectifier 20 comprises two alternating current inputs 21 and two alternating current outputs 22; Said two alternating current inputs 21 are connected with the first rear end output L21 and the second rear end output L22 of said differential mode inductance L1 respectively, and said two alternating current outputs 22 are connected with said transformer T1.Said ac rectifier 20 specifically comprises first, second diode BD1, BD2; First, second, third, fourth, the 5th, the 6th transistor Q1, Q2, Q3, Q4, Q5, Q6, first, second, third capacitor C X1, CX2, CX3 and first, second polar capacitor C1, C2.In this execution mode, each diode all comprises an anode and a negative electrode, and each transistor comprises that all one first end S, one second end D and are used to control the control end G of the break-make of the first end S and the second end D; Said i transistorized control end is Gi.Said transistor all is the N channel insulated gate transistor, and wherein the first end S is a source electrode, and the second end D is drain electrode, and control end G is a grid.
The anode of the said first diode BD1 is an alternating current input 21 wherein, and its negative electrode is an alternating current output 22 wherein; The anode of the said second diode BD2 is another alternating current input 21, and its negative electrode is another alternating current output 22; The anode of said first, second diode BD1, BD2 is connected through the said first capacitor C X1; The negative electrode of the said first diode BD1 is connected with the first end S of the first transistor Q1 and the second end D of the 3rd transistor Q3, and the negative electrode of the said second diode BD2 is connected with the first end S of transistor seconds Q2 and the second end D of the 4th transistor Q4.The positive pole of the said first polar capacitor C1 is connected with the second end D of the first transistor Q1, and its negative pole is connected with the first end S of the 4th transistor Q4; The positive pole of the said second polar capacitor C2 is connected with the second end D of transistor seconds Q2, and its negative pole is connected with the first end S of the 3rd transistor Q3.The first end S of said the 3rd transistor Q3 is connected with the anode of the said first diode BD1, and the first end S of said the 4th transistor Q4 is connected with the anode of the said second diode BD2.The end of the said second capacitor C X2 is connected with the second end D of the 3rd transistor Q3, and the other end is connected with the first end S of the 5th transistor Q5; The second end D of said the 5th transistor Q5 is connected with the anode of the first diode BD1.The end of said the 3rd capacitor C X3 is connected with the second end D of the 4th transistor Q4, and the other end is connected with the first end S of the 6th transistor Q6; The second end D of said the 6th transistor Q6 is connected with the anode of the second diode BD2.
Said transformer T1 comprises a primary coil Ta and a level coil Tb, and said primary coil Ta comprises first, second primary output terminal Ta1, Ta2, and said secondary coil Tb comprises first, second, third secondary output end Tb1, Tb2, Tb3.Said first, second primary output terminal Ta1, Ta2 are connected with said two alternating current outputs 22 respectively; Said second subprime output Tb2 is at the first secondary output end Tb1 with for the third time between the level output Tb3, and is connected with ground.
Said direct current rectification circuit 30 comprises the 7th, the 8th, the 9th, the tenth, the 11 transistor Q7, Q8, Q9, Q10, Q11, differential mode inductance L2, the 3rd polar capacitor C3 and soft switched inductors L3.The first end S of said the 7th transistor Q7 is connected with the said first secondary output end Tb1, and its second end D is connected with the second end D of the 8th transistor Q8.The first end S of said the 8th transistor Q8 is connected with a total output end vo ut through said differential mode inductance L2.The first end S of said the 9th transistor Q9 is connected with the said output of level for the third time Tb3, and its second end D is connected with the second end D of the tenth transistor Q10.The first end S of said the tenth transistor Q10 is connected with the first end S of the 8th transistor Q8.The first end S ground connection of said the 11 transistor Q11, its second end D is connected with the first end S of the 8th transistor Q8.The positive level of said the 3rd polar capacitor C3 is connected its negative pole and ground connection with said total output end vo ut.Said soft switched inductors L3 is connected between said second subprime output Tb2 and the ground.
Said controller 40 is connected with the control end G1-G11 of said the first to the 11 transistor Q1 ~ Q11 respectively, is used to control the break-make of each the transistorized first end S and the second end D.
Please consult Fig. 2 in the lump, in use, the cycle of the alternating current of said AC power Vac output comprises positive half period and negative half-cycle.Said anti-clutter circuit 10 is used for the various interference signals that filtering is come in from the electrical network that said AC power Vac is provided; Prevent that simultaneously the high-frequency signal that power circuit 100 forms from polluting electrical network, is delivered to alternating current the alternating current input 21 of said ac rectifier 20 then.In the positive half period of said alternating current, said controller 40 controls the first, the 4th, the 7th, the 8th transistor Q1, Q4, Q7, Q8 conducting are controlled second, third, the 5th, the 9th, the tenth transistor Q2, Q3, Q5, Q9, Q10 end.The alternating current input 21 that said alternating current warp is connected with the first rear end output L21 gets into, and a part is through entering into said anti-clutter circuit 10 from the alternating current input 21 that is connected with the second rear end output L22 behind the first capacitor C X1; A part is successively through entering into said anti-clutter circuit 10 from the alternating current input 21 that is connected with the second rear end output L22 behind the first diode BD1, the first transistor Q1, the first polar capacitor C1; A part enters into said anti-clutter circuit 10 through the first diode BD1, primary coil Ta, the 4th transistor Q4 from the alternating current input 21 that is connected with the second rear end output L22 successively.Said controller 40 controls the 6th transistor Q6 is in the state of quick switching, with improve alternating current frequency, thereby reduce the electric energy size of each transmission.Said alternating current is sent to said transformer T1 from said ac rectifier 20; Said electric current is exported from said total output end vo ut through the 7th transistor Q7, the 8th transistor Q8, differential mode inductance L2 from the first secondary output end Tb1 output of secondary coil Tb successively.Said the 7th transistor Q7 is used to prevent that electric current from pouring in down a chimney, and said the 8th transistor Q8 is used to let negative current end.Said the 7th transistor Q7, the 8th transistor Q8, differential mode inductance L2, the 3rd polar capacitor C3, soft switched inductors L3 form charging circuit the 3rd polar capacitor C3 are charged.
As shown in Figure 3; Switch to moment of negative half-cycle at said alternating current from positive half period; Said controller 40 controls the first, the 4th, the 6th, the 7th, the 8th transistor Q1, Q4, Q6, Q7, Q8 end, control second, third, the 9th, the tenth transistor Q2, Q3, Q9, Q10 conducting.Said controller 40 is controlled the 11 transistor Q11 conducting simultaneously; Said the 11 transistor Q11, differential mode inductance L2, the 3rd polar capacitor C3 form a discharge circuit, and the electric energy that is stored among said the 3rd polar capacitor C3 discharges to replenish said direct current rectification circuit 30 at less output current of switching initial stage.
Power circuit provided by the invention effectively reduces the efficiency losses of whole power circuit, thereby has effectively practiced thrift electric energy through in ac rectifier, adopting the lower transistor of a plurality of efficiency losses.
It is understandable that, for the person of ordinary skill of the art, can make change and the distortion that other various pictures are answered by technical conceive according to the present invention, and all these change the protection range that all should belong to claim of the present invention with distortion.
Claims (9)
1. ac rectifier; It comprises first, second diode and first, second, third, fourth transistor; Each diode all comprises an anode and a negative electrode, and each transistor comprises that all one first end, one second end and are used to control the control end of the break-make of first end and second end; The anode of said first diode is connected with the anode of second diode; The negative electrode of this first diode is connected with the 3rd transistorized second end with first end of the first transistor; The negative electrode of this second diode is connected with the 4th transistorized second end with first end of transistor seconds; Second end of this first transistor is connected with the anode of second diode and the 4th transistorized first end; Second end of this transistor seconds is connected with the anode of first diode and the 3rd transistorized first end; The anode of this first, second diode is two alternating current inputs, and the negative electrode of this first, second diode is two alternating current outputs; In the positive half period of alternating current, control said the first, the 4th transistor and open; In the negative half-cycle of alternating current, control said second, third transistor and open.
2. ac rectifier as claimed in claim 1 is characterized in that: said ac rectifier also comprises first electric capacity, first polar capacitor and second polar capacitor; Said first electric capacity is connected between two anodes of said first, second diode; The positive pole of said first polar capacitor is connected with second end of said the first transistor, and its negative pole is connected with the 4th transistorized first end; The positive pole of said second polar capacitor is connected with second end of transistor seconds, and its negative pole is connected with the 3rd transistorized first end.
3. ac rectifier as claimed in claim 1 is characterized in that: said ac rectifier also comprises second electric capacity, the 5th transistor, the 3rd electric capacity and the 6th transistor; One end of said second electric capacity is connected with the 3rd transistorized second end, and the other end is connected with the 5th transistorized first end; The said the 5th transistorized second end is connected with the anode of first diode; One end of said the 3rd electric capacity is connected with the 4th transistorized second end, and the other end is connected with the 6th transistorized first end; The said the 6th transistorized second end is connected with the anode of second diode; In the positive half period of alternating current, control said the 6th transistor and open; In the negative half-cycle of alternating current, control said the 5th transistor and open.
4. power circuit, it comprises anti-clutter circuit, ac rectifier, transformer, direct current rectification circuit and controller; Said ac rectifier comprises two alternating current inputs and two alternating current outputs; Said anti-clutter circuit is connected between the ac input end of an AC power and ac rectifier, and said transformer comprises primary coil that is connected with the ac output end of ac rectifier and the secondary coil that is connected with the direct current rectification circuit; Said ac rectifier comprises first, second diode and first, second, third, fourth transistor; Each diode all comprises an anode and a negative electrode, and each transistor comprises that all one first end, one second end and are used to control the control end of the break-make of first end and second end; Said controller is connected with each transistorized control end respectively; The anode of said first diode is connected with the anode of second diode; The negative electrode of this first diode is connected with the 3rd transistorized second end with first end of the first transistor; The negative electrode of this second diode is connected with the 4th transistorized second end with first end of transistor seconds; Second end of this first transistor is connected with the anode of second diode and the 4th transistorized first end; Second end of this transistor seconds is connected with the anode of first diode and the 3rd transistorized first end; The anode of this first, second diode is two alternating current inputs, and the negative electrode of this first, second diode is two alternating current outputs; In the positive half period of alternating current, said controller is controlled said the first, the 4th transistor and is opened; In the negative half-cycle of alternating current, said second, third transistor of said controller control is opened.
5. power circuit as claimed in claim 4 is characterized in that: said ac rectifier also comprises first electric capacity, first polar capacitor and second polar capacitor; Said first electric capacity is connected between two anodes of first, second diode; The positive pole of said first polar capacitor is connected with second end of the first transistor, and its negative pole is connected with the 4th transistorized first end; Second end of the transistor seconds of said second polar capacitor is connected, and its negative pole is connected with the 3rd transistorized first end.
6. power circuit as claimed in claim 4 is characterized in that: said ac rectifier also comprises second electric capacity, the 5th transistor, the 3rd electric capacity and the 6th transistor; One end of said second electric capacity is connected with the 3rd transistorized second end, and the other end is connected with the 5th transistorized first end; The said the 5th transistorized second end is connected with the anode of first diode; One end of said the 3rd electric capacity is connected with the 4th transistorized second end, and the other end is connected with the 6th transistorized first end; The said the 6th transistorized second end is connected with the anode of second diode; In the positive half period of alternating current, said controller is controlled said the 6th transistor and is opened; In the negative half-cycle of alternating current, said controller is controlled said the 5th transistor and is opened.
7. power circuit as claimed in claim 4 is characterized in that: said primary coil comprises first, second primary output terminal, and said secondary coil comprises first, second, third secondary output end; Said first, second primary output terminal is connected with said two alternating current outputs respectively; Said second subprime output is at first secondary output end with for the third time between the level output, and is connected with ground.
8. power circuit as claimed in claim 7 is characterized in that: said direct current rectification circuit comprises the the the 7th, the 8th, the 9th, the tenth, the 11 transistor, differential mode inductance and the 3rd polar capacitor; The said the 7th transistorized first end is connected with said first secondary output end, and its second end is connected with the 8th transistorized second end; The said the 8th transistorized first end is connected with a total output through said differential mode inductance; The said the 9th transistorized first end is connected with the said output of level for the third time, and its second end is connected with the tenth transistorized second end; The said the tenth transistorized first end is connected with the 8th transistorized first end; The said the 11 transistorized first end ground connection, its second end is connected with the 8th transistorized first end; The positive level of said the 3rd polar capacitor is connected its minus earth with said total output; In the positive half period of alternating current, that said controller is controlled is said the 7th, the 8th, the 11 transistor is opened; In the negative half-cycle of alternating current, that said controller is controlled is said the 9th, the tenth, the 11 transistor is opened.
9. power circuit as claimed in claim 8 is characterized in that: said direct current rectification circuit also comprises a soft switched inductors, and said soft switched inductors is connected between said second subprime output and the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100962313A CN102751890A (en) | 2011-04-18 | 2011-04-18 | Alternating-current rectification circuit and power circuit using same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100962313A CN102751890A (en) | 2011-04-18 | 2011-04-18 | Alternating-current rectification circuit and power circuit using same |
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|---|---|
| CN102751890A true CN102751890A (en) | 2012-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100962313A Pending CN102751890A (en) | 2011-04-18 | 2011-04-18 | Alternating-current rectification circuit and power circuit using same |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5432409A (en) * | 1978-03-20 | 1995-07-11 | Nilssen; Ole K. | Electronic ballast with parallel-tuned output circuit |
| CN2733737Y (en) * | 2004-05-12 | 2005-10-12 | 郑春江 | AC/DC power adapter |
| CN200959577Y (en) * | 2006-04-30 | 2007-10-10 | 武汉万鹏科技有限公司 | Power supply rectifier |
| CN101282084A (en) * | 2007-04-06 | 2008-10-08 | 群康科技(深圳)有限公司 | Power supply circuit and LCD device using the same |
| CN101399498A (en) * | 2007-09-26 | 2009-04-01 | 华为技术有限公司 | DC conversion power source device and method for improving DC conversion power source device |
-
2011
- 2011-04-18 CN CN2011100962313A patent/CN102751890A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5432409A (en) * | 1978-03-20 | 1995-07-11 | Nilssen; Ole K. | Electronic ballast with parallel-tuned output circuit |
| CN2733737Y (en) * | 2004-05-12 | 2005-10-12 | 郑春江 | AC/DC power adapter |
| CN200959577Y (en) * | 2006-04-30 | 2007-10-10 | 武汉万鹏科技有限公司 | Power supply rectifier |
| CN101282084A (en) * | 2007-04-06 | 2008-10-08 | 群康科技(深圳)有限公司 | Power supply circuit and LCD device using the same |
| CN101399498A (en) * | 2007-09-26 | 2009-04-01 | 华为技术有限公司 | DC conversion power source device and method for improving DC conversion power source device |
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Application publication date: 20121024 |