CN100588099C - Commutation filtering controller and method for power supplier - Google Patents
Commutation filtering controller and method for power supplier Download PDFInfo
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- CN100588099C CN100588099C CN200610127700A CN200610127700A CN100588099C CN 100588099 C CN100588099 C CN 100588099C CN 200610127700 A CN200610127700 A CN 200610127700A CN 200610127700 A CN200610127700 A CN 200610127700A CN 100588099 C CN100588099 C CN 100588099C
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- drive integrated
- diode
- power supply
- current rectifying
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Abstract
The utility model relates to a rectifying and filtering control device and method for power supplier. The utility model is characterized in that a rectifying and filtering circuit is connected with asaturable inductance, a capacitor and a rectifier; the rectifying and filtering circuit comprises two electric switch units which are respectively connected with the two ends of the two rectifiers inparallel; the current flows reversely in the rectifying and filtering circuit to remain the two electric switches in an off state in different time sequence, thereby preventing the reversely flowed current from burning the two electric switches.
Description
Technical field
What the present invention relates to is a kind of commutation filtering controller and method, particularly be a kind of utilization on power supply unit, can promote the service efficiency of electric energy, and have the commutation filtering controller that the electric current that prevents reverse backflow burns two electronic switches.
Background technology
By its current rectifying and wave filtering circuit of existing power supply unit (current doubler), as shown in Figure 3, be to utilize two diode CR3, CR4 as rectified action, its signal output end of the rectangular wave power supply generator A A that is driven by logical integrated circuit D
1, A
2, export the logic signal of positive half cycles (POsitivity duly cycle) to contact O in different sequential respectively
1And another contact O
2, its positive and negative electrode of transformer B B
1, B
2In different sequential, the change of the positive and negative polarity that produces is to make diode CR4 or diode CR3 in different sequential conductings.
Yet diode CR3, CR4 still have forward drop between its positive and negative electrode when conducting forward, thereby cause the consume of output electric energy.Its wasted power P=0.7V.IC
R3Or P=0.7V. integrated circuit
R4
In order to solve the shortcoming of above-mentioned existing skill, the circuit of another Improvement type (Sync RectiFier Currentdoub ler) is used, see also Fig. 4 drive integrated circult D and give filtering shaping circuit in order to output signal, its main characteristic is two electronic switch SW in parallel on two diode CR3, CR4
1, SW
2, it constitutes material is field-effect transistor (FET), as two electronic switch SW
1, SW
2When being in short circuit (on) state, can reduce the voltage difference between its positive and negative electrode of diode CR4, CR3, so can increase the efficient of electric energy output; Yet its shortcoming, be when the power work cycle too hour, be back to electronic switch SW because of some factor (for example improper use or connection) causes producing backward current
1, SW
2, the current value serious offense of this reverse backflow is at electronic switch SW
1, SW
2Anti-current value the time, electronic switch SW
1, SW
2Burnt.
Summary of the invention
Main purpose of the present invention, promptly in commutation filtering controller that a kind of power supply unit is provided and method, be arranged on the current rectifying and wave filtering circuit, connect a satiable inductor, diode and an electric capacity, before producing the electric current of reverse backflow on the current rectifying and wave filtering circuit, can be that seasonal electronic switch is open circuit (off) state, burn to prevent electronic switch, and can promote the service efficiency of the magnitude of current.
For achieving the above object, the technical solution used in the present invention is, a kind of commutation filtering controller of power supply unit is provided, and it comprises: the control circuit of described power supply unit connects a logical integrated circuit; Logical integrated circuit is in order to drive two drive integrated circult actions; Described two drive integrated circults are connected with a current rectifying and wave filtering circuit and control first in the described current rectifying and wave filtering circuit respectively, the short/open of two electronic switches, described rectification filter circuit output end connects an end of a satiable inductor and the negative pole of a diode, the positive pole of described diode connects an end of an electric capacity, the other end ground connection of described electric capacity, the signal input end of described two drive integrated circults is connected with first diode respectively, second diode, the contact that first drive integrated circult in described two drive integrated circults is connected with described first diode is first contact, the contact that second drive integrated circult in described two drive integrated circults is connected with described second diode is second contact, and the end that end that described first diode does not link to each other with described first drive integrated circult and described second diode do not link to each other with described second drive integrated circult links to each other and the lead between it has one the 3rd contact; Have lead to be connected between the diode that described rectification filter circuit output end connected and the electric capacity, the contact of its connection is the 4th contact, and described the 4th contact links to each other with described the 3rd contact.
A kind of control method of commutation filtering controller of power supply unit also is provided simultaneously, commutation filtering controller comprises a current rectifying and wave filtering circuit, a satiable inductor, a diode, an electric capacity, a logical integrated circuit, two first, second electronic switches that drive integrated circult, a control circuit and described current rectifying and wave filtering circuit comprise, wherein, this method comprises that described control circuit connects described logical integrated circuit, and described logical integrated circuit is in order to drive described two drive integrated circults action; Described two drive integrated circults are connected with current rectifying and wave filtering circuit and control first in the described current rectifying and wave filtering circuit respectively, the short/open of second electronic switch, the output of described current rectifying and wave filtering circuit connects an end of described satiable inductor and the negative pole of described diode, the positive pole of described diode connects an end of described electric capacity, the other end ground connection of described electric capacity, first, the signal input end of second drive integrated circult is respectively with first, one end of second diode connects, first, the positive pole that connects the diode that is connected with rectification filter circuit output end after the other end of second diode links to each other again, when inverter current is back to satiable inductor by the other end of satiable inductor, make on satiable inductor and the tie point that the output of described current rectifying and wave filtering circuit is connected and produce a back electromotive force, the diode that is connected with rectification filter circuit output end forms conducting state, thereby the signal input end that makes two drive integrated circults forms 0 voltage, two drive integrated circults not output signal give first, two electronic switches, first, two electronic switches are open-circuit condition.
Description of drawings
Fig. 1 is a circuit diagram of the present invention;
Block schematic diagram when Fig. 2 works for the present invention;
Fig. 3 is the control circuit figure in the power supply unit of existing usefulness;
Control circuit figure in the power supply unit of another existing usefulness of Fig. 4.
Description of reference numerals: 70-control circuit; The 60-logical integrated circuit; 41,42-drive integrated circult; The 50-current rectifying and wave filtering circuit; I
0-electric current; I
1, I
2-lead; 552-positive pulse ripple; 553-negative pulse ripple; 551-rectangular wave power supply generator; The 80-satiable inductor; The 81-diode; 82,85-electric capacity; The g-tie point; A-the 5th contact; B-the 6th contact; E-first contact; F-the 3rd contact; D--second contact; 511-first electronic switch; 522-second electronic switch; V
+-positive supply; 53,54-inductance; The 55-transformer; R
1, R
2-resistance; 51-first rectifier; 52-second rectifier; 402-first diode; 403-second diode; 65,66,67,68-output.
Embodiment
Below in conjunction with accompanying drawing, be described in more detail with other technical characterictic and advantage the present invention is above-mentioned.
As shown in Figure 1, the present invention is providing a kind of commutation filtering controller of power supply unit, comprising:
The control circuit 70 of one power supply unit connects a logical integrated circuit 60;
Logical integrated circuit 60 is in order to drive drive integrated circult 41,42 actions more than at least one;
The link of current rectifying and wave filtering circuit 50 (current d0uler) connects satiable inductor 80 (Swingchoke), diode 81 and an electric capacity 82 respectively;
First electronic switch 511 is connected in parallel between the positive and negative electrode of first rectifier 51 in the current rectifying and wave filtering circuit 50 (current douler);
Second electronic switch 522 is connected in parallel between the positive and negative electrode of second rectifier 52 in the current rectifying and wave filtering circuit 50; Short circuit (the on)/open circuit (off) of drive integrated circult 41 in order to control second electronic switch 522, short circuit (the on)/open circuit (off) of another drive integrated circult 42 in order to control first electronic switch 511;
When current rectifying and wave filtering circuit 50 because of backward current I
0When being back to satiable inductor 80, satiable inductor 80 its two ends form voltage difference, make a tie point g of satiable inductor 80 go up generation one back electromotive force, diode 81 forms conducting state, make the signal input end of drive integrated circult 41,42 form 0 voltage, drive integrated circult 41,42 not output signal is given first and second electronic switch 511,522, and first and second electronic switch 511,522 is open circuit (off) state, the electric current I of reverse backflow
0Burn first electronic switch, 511, the second electronic switches 522.
Wherein current rectifying and wave filtering circuit 50 is by comprising:
At least more than one inductance 53,54, a transformer 55, a rectangular wave power supply generator (Pulse WidthM0dulation) 551, first and second rectifier 51,52 and first and second electronic switch 511,522 connect to form.
Wherein the signal input end of two drive integrated circults 41, integrated circuit 42 is to be connected with first diode, second diode 402,403, and the lead between first and second diode 402,403 has first, second, third contact e, d, f respectively;
The lead I of the 3rd contact f wherein
1Be connected the lead I between diode 81 and the electric capacity 82
2On, it has one the 4th contact C; As the first contact e, the second contact d, when the 3rd contact f is 0 current potential, drive integrated circult 41,42 not output signal gives first and second electronic switch 511,522, and first and second electronic switch 511,522 is open circuit (off) state.
Wherein be connected a resistance R between logical integrated circuit 60 one signal output ends 66 and the drive integrated circult 41
1
Be connected another resistance R between logical integrated circuit 60 its another signal output ends 67 and another drive integrated circult 42
2
Wherein the action of the exchange sequential of the rectangular wave power supply generator in the current rectifying and wave filtering circuit 50 (Pulse Width Modulation) the 551 positive and negative impulse waves of being exported 552,553 is synchronous with the sequential of first and second switch 511,522 its short circuits (on) and open circuit (off) switching motion.
Two signal output ends the 65, the 68th of logical integrated circuit 60 are connected with a rectangular wave power supply generator 551, wherein in logical integrated circuit 60 outputs 65,68 its signal of exporting input rectangular wave power supply generators 551, rectangular wave power supply generator 551 is subjected to the control of logical integrated circuit 60, is able at different timing sequence generating positive pulse ripples 552 and negative pulse ripple 553.
As shown in Figure 1, the control circuit 70 of power supply unit, the output controlling signal is given logical integrated circuit 60, and logical integrated circuit 60 at different sequential difference output signals, is given drive integrated circult 41,42 by two outputs 66,67.
On another sequential, output 66 output signals are to drive integrated circult 41, it is to be short circuit (on) or open circuit (off) that the sequential of drive integrated circult 41 under logical integrated circuit 60 sets removes to drive second electronic switch 522, almost no-voltage is poor between the positive and negative electrode of second rectifier 52 when short circuit, does not just have power consumption this moment.
In another sequential, output 67 output signals are to drive integrated circult 42, the sequential that drive integrated circult 42 sets with logical integrated circuit 60 removes to drive short circuit (the on)/open circuit (off) of first electronic switch 511, the two ends of first rectifier 51 are the 0V state when short circuit, therefore can consumed power.
When first electronic switch, 511 short circuits (on), can make the voltage at first rectifier, 51 two ends reduce to 0, form voltage to reach between the 5th contact a, the 6th contact b, this voltage is transported to the two ends of electric capacity 85 via satiable inductor 80, this moment, satiable inductor 80 was in the magnetic saturation state, be just as short circuit (on) state, with allow electric current forward pass through satiable inductor 80.
When the output current of current rectifying and wave filtering circuit 50 too low, when being lower than the saturation current value of satiable inductor 80, the voltage at capacitor 82 two ends can be via diode 81, and discharge by current rectifying and wave filtering circuit 50, and make voltage drop to 0V, this moment the first contact e, also moment is reduced to 0V to the logic signal at the second contact d two ends, and make drive integrated circult 41 not be transfused to signal, there is not output signal to remove to drive second electronic switch 522 yet, make second electronic switch 522 be the state of open circuit (off), also stoped the voltage reversal of capacitor 85 to reflux to go to damage first or second switch 511 by this, 522, make entire circuit be able to normal operation.
Satiable inductor device 80, when big current value (as greatly at 0.5 ampere) when forward passing through, it can be magnetic saturation, and be regarded as short circuit (on), two rectifiers 51,52 are able to normal operation, only work as small current value, for example little of 0.5 ampere-hour, during by satiable inductor 80, satiable inductor 80 is in the unsaturation state, and then it is to form high inductance, and its two ends form voltage difference, are controlled the state that first switch 511 or second switch 522 are in open circuit (off), the 5th contact a, be regarded as short circuit between the 6th contact b, its magnitude of voltage is 0, and contact C forms 0 voltage, makes the first contact e, form 0 voltage between the second contact d, so drive integrated circult 41 or drive integrated circult 42 do not remove to drive first or second electronic switch 511,522, and make first or second electronic switch 511,522 are open circuit (off) state.
As shown in Figure 1, satiable inductor 80 is essentially a current sense device, and the forward current convergence just produced the reverse backflow electric current I at 0 o'clock
0, just in case electric current I
0During backflow, satiable inductor 80 forms undersaturated condition, its two ends form voltage drop, make tie point g current potential near the 6th contact b, the current potential of the 4th contact c is near 0V, and the 3rd contact F is near 0V, and the first contact e, the second contact d are near 0V, so drive integrated circult 41,42 can output signal, so first and second switch 511,522 can be because of backward current I
0Backflow and burnt.
As shown in Figure 2, first switch 511 and second switch 522, the sequential of its short circuit (on) and open circuit (off) state is that the sequential of the positive and negative impulse wave 522,553 exported with rectangular wave power supply generator 551 (Pulse Width Modulation) is synchronous, this Synchronization Control is controlled by logical integrated circuit 60 internal circuits, its objective is for fear of the electric current power loss that first and second rectifier caused in 51,52 o'clock of flowing through.
In other words, when the positive and negative impulse wave 552,553 of rectangular wave power supply generator 551 changed in the sequential difference, first and second switch 511,522 can be done the change action of short circuit (on) and open circuit (off) relatively.
The above only is preferred embodiment of the present invention, only is illustrative for the purpose of the present invention, and nonrestrictive.Those skilled in the art is understood, and can carry out many changes to it in the spirit and scope that claim of the present invention limited, revise, even equivalence, but all will fall within the scope of protection of the present invention.
Claims (7)
1. the commutation filtering controller of a power supply unit is characterized in that, it comprises: the control circuit of described power supply unit connects a logical integrated circuit; Logical integrated circuit is in order to drive two drive integrated circult actions; Described two drive integrated circults are connected with a current rectifying and wave filtering circuit and control first in the described current rectifying and wave filtering circuit respectively, the short/open of two electronic switches, the output of described current rectifying and wave filtering circuit connects an end of a satiable inductor and the negative pole of a diode, the positive pole of described diode connects an end of an electric capacity, the other end ground connection of described electric capacity, the signal input end of described two drive integrated circults is connected with first diode respectively, second diode, the contact that first drive integrated circult in described two drive integrated circults is connected with described first diode is first contact, the contact that second drive integrated circult in described two drive integrated circults is connected with described second diode is second contact, and the end that end that described first diode does not link to each other with described first drive integrated circult and described second diode do not link to each other with described second drive integrated circult links to each other and the lead between it has one the 3rd contact; Have lead to be connected between the diode that described rectification filter circuit output end connected and the electric capacity, the contact of its connection is the 4th contact, and described the 4th contact links to each other with described the 3rd contact.
2. the commutation filtering controller of a kind of power supply unit according to claim 1, it is characterized in that, described current rectifying and wave filtering circuit, its by: two inductance, a transformer, a rectangular wave power supply generator, first and second rectifier and described first and second electronic switches connect to form; Wherein, one end of described two inductance links to each other, the other end of described two inductance connects an end of described first, second rectifier respectively, the other end of described two inductance also connects the two ends of described Circuit Fault on Secondary Transformer respectively simultaneously, the other end of described first, second rectifier links to each other, the two ends of described rectangular wave power supply generator connect the two ends of described transformer primary side, and described first electronic switch is connected in parallel between the positive and negative electrode of first rectifier in the current rectifying and wave filtering circuit; Second electronic switch is connected in parallel between the positive and negative electrode of second rectifier in the current rectifying and wave filtering circuit; First drive integrated circult in described two drive integrated circults is in order to control the short/open of second electronic switch, and second drive integrated circult in described two drive integrated circults is in order to control the short/open of first electronic switch.
3. the commutation filtering controller of power supply unit according to claim 1 is characterized in that, is connected a resistance between first drive integrated circult in first signal output end of described logical integrated circuit and described two drive integrated circults;
Be connected another resistance between second drive integrated circult in second signal output end of described logical integrated circuit and described two drive integrated circults.
4. the commutation filtering controller of power supply unit according to claim 1, it is characterized in that, the the 3rd, the 4th signal output end of described logical integrated circuit is to connect a rectangular wave power supply generator, described rectangular wave power supply generator is subjected to the control of described logical integrated circuit, is able to involve the negative pulse ripple in different timing sequence generating positive pulses.
5. the control method of the commutation filtering controller of a power supply unit, it is characterized in that, commutation filtering controller comprises a current rectifying and wave filtering circuit, a satiable inductor, a diode, an electric capacity, a logical integrated circuit, two first, second electronic switches that drive integrated circult, a control circuit and described current rectifying and wave filtering circuit comprise, wherein, this method comprises that described control circuit connects described logical integrated circuit, and described logical integrated circuit is in order to drive described two drive integrated circults action; Described two drive integrated circults are connected with current rectifying and wave filtering circuit and control first in the described current rectifying and wave filtering circuit respectively, the short/open of second electronic switch, the output of described current rectifying and wave filtering circuit connects an end of described satiable inductor and the negative pole of described diode, the positive pole of described diode connects an end of described electric capacity, the other end ground connection of described electric capacity, first, the signal input end of second drive integrated circult is respectively with first, one end of second diode connects, first, the positive pole that connects the diode that is connected with rectification filter circuit output end after the other end of second diode links to each other again, when inverter current is back to satiable inductor by the other end of satiable inductor, make on satiable inductor and the tie point that the output of described current rectifying and wave filtering circuit is connected and produce a back electromotive force, the diode that is connected with rectification filter circuit output end forms conducting state, thereby the signal input end that makes two drive integrated circults forms 0 voltage, two drive integrated circults not output signal give first, two electronic switches, first, two electronic switches are open-circuit condition.
6. the control method of the commutation filtering controller of a kind of power supply unit according to claim 5, it is characterized in that, described current rectifying and wave filtering circuit comprises a rectangular wave power supply generator, described rectangular wave power supply generator is subjected to the control of logical integrated circuit, is able to involve the negative pulse ripple in different timing sequence generating positive pulses.
7. the control method of the commutation filtering controller of power supply unit according to claim 6, it is characterized in that the exchange sequential action of the positive and negative impulse wave that the rectangular wave power supply generator in the described current rectifying and wave filtering circuit is exported is synchronous with the sequential of its short circuit of first and second electronic switch and open circuit switching motion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610127700A CN100588099C (en) | 2006-09-07 | 2006-09-07 | Commutation filtering controller and method for power supplier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610127700A CN100588099C (en) | 2006-09-07 | 2006-09-07 | Commutation filtering controller and method for power supplier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101141098A CN101141098A (en) | 2008-03-12 |
| CN100588099C true CN100588099C (en) | 2010-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610127700A Expired - Fee Related CN100588099C (en) | 2006-09-07 | 2006-09-07 | Commutation filtering controller and method for power supplier |
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|---|---|
| CN (1) | CN100588099C (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110123122A (en) * | 2019-05-06 | 2019-08-16 | 九阳股份有限公司 | A kind of method, cooking apparatus and the storage medium of SCR control motor rotary speed |
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- 2006-09-07 CN CN200610127700A patent/CN100588099C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN101141098A (en) | 2008-03-12 |
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Granted publication date: 20100203 Termination date: 20120907 |