CN104052311B - Holding concurrently can the DC power supply of electrochemical capacitor step-down of anti-thunder - Google Patents
Holding concurrently can the DC power supply of electrochemical capacitor step-down of anti-thunder Download PDFInfo
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- CN104052311B CN104052311B CN201410318939.2A CN201410318939A CN104052311B CN 104052311 B CN104052311 B CN 104052311B CN 201410318939 A CN201410318939 A CN 201410318939A CN 104052311 B CN104052311 B CN 104052311B
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- 239000003990 capacitor Substances 0.000 title claims abstract description 97
- 238000001914 filtration Methods 0.000 claims abstract description 21
- 230000033228 biological regulation Effects 0.000 claims abstract description 20
- 230000001052 transient effect Effects 0.000 claims description 94
- 230000000087 stabilizing effect Effects 0.000 claims description 8
- 239000000203 mixture Substances 0.000 description 13
- 238000010586 diagram Methods 0.000 description 9
- 230000003068 static effect Effects 0.000 description 8
- 230000007704 transition Effects 0.000 description 8
- 230000006837 decompression Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000007599 discharging Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
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- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012770 industrial material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
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Abstract
A kind of holding concurrently can the DC power supply of electrochemical capacitor step-down of anti-thunder, be made up of positive half cycle pressure unit, negative half period pressure unit, the rectification unit having anti-thunder function concurrently, current limliting filtering and voltage regulation unit four part, it is characterized in that: described positive half cycle pressure unit-end hold with the L of AC power supplies and is connected, separately-and hold and be connected with described 11 ends having the rectification unit of anti-thunder function concurrently; Described negative half period pressure unit-end hold with the N of AC power supplies and is connected, separately-and hold and be connected with described 22 ends having the rectification unit of anti-thunder function concurrently; Described 33 ends having the rectification unit of anti-thunder function concurrently are connected with described current limliting filtering and voltage regulation unit, and 44 ends are held with common port E and are connected; Described current limliting filtering and 55 ends of voltage regulation unit both held with common port E be connected also with load RL-negative terminal of end and output voltage VL is connected, 66 ends and load RL another-anode of end and output voltage VL is connected.
Description
Technical field
The present invention relates to DC power supply field, particularly relate to and a kind ofly have anti-thunder function concurrently, adopt the DC power supply of electrochemical capacitor step-down of anti-thunder " hold concurrently can " of electrochemical capacitor step-down.
Background technology
Any electronic equipment has common parts---DC power supply.Large to supercomputer, little of pocket radio set, all must could normal work under the support of DC power supply.
In the occasion need not isolated with municipal AC power (AC380V, AC220V or AC110V, hereinafter referred to as AC power supplies), engineers and technicians usually adopt: first capacitance decompression, then rectification, filtering, voltage stabilizing method composition DC power supply.Fig. 1 is the DC power supply of the routine of capacitance decompression, in figure: the discharge resistance that C is decompression capacitor, R is it.
, there is following binomial shortcoming in the DC power supply of the routine of the capacitance decompression of representative that described with Fig. 1 is:
The first, according to the circuit structure of Fig. 1, described decompression capacitor C must adopt polarity free capacitor such as polypropylene capactive (CBB electric capacity).This polarity free capacitor volume is relatively huge, and price is also more expensive.Such as, the CBB60 type electric capacity of 20 μ F/450V is a diameter is 40mm, be highly " huge monster " of 80mm, and its price is also up to more than ten yuan.
" exactly because polarity free capacitor volume is relatively huge, and price is also more expensive ", so, in the occasion that volume and cost are all placed restrictions on, Fig. 1 just can not be adopted to be the DC power supply of the routine of representative.
The second, the function of the hard pulse infringement of nonreactive Lightning strike or static discharge (ESD), electrically fast transition (EFT).Obviously, because described DC power supply is without the function of resisting above-mentioned hard pulse, so DC power supply itself is subject to the impact of above-mentioned hard pulse with the electronic equipment accepting its power supply and damages.
For convenience of setting forth, be " anti-thunder " function hereinafter referred to as " resisting the function of Lightning strike or static discharge (ESD), electrically fast transition (EFT) ".
Electrochemical capacitor has following feature:
1, the capacitance of unit volume is very large, larger than the electric capacity of other kinds tens to hundreds of times;
2, price is low, and the electric capacity of other kind of cost ratio has overwhelming dominance---because the composition material of electrochemical capacitor is all common industrial materials, such as aluminium etc., so price is low;
3, volume is little, because the capacitance of unit volume is tens of the electric capacity of other kinds to hundreds of times, so volume is also much smaller than the electric capacity of other kinds of same capacity;
4, be have polar capacitor, forward can bear higher rated voltage (such as 400v), and the ability of oppositely bearing voltage is poor, at most only can bear three ten-day period of hot season voltage;
Transient voltage suppressor (TRANSIENTVOLTAGESUPPRESSOR) is called for short TVS, and be a kind of new product grown up on voltage-stabiliser tube Process ba-sis, Fig. 3 shows V-I characteristic curve of unidirectional transient voltage suppressor.
Described unidirectional transient voltage suppressor TVS has following characteristics:
1, its forward characteristic is identical with general-purpose diode, and peak forward voltage is about 1.2V;
2, its reverse characteristic is identical with PN junction avalanche device:
(1), when the reverse voltage of its two interpolar is less than its puncture voltage UB, its approximate open circuit;
(2), when the reverse voltage of its two interpolar reaches its puncture voltage UB, its near short circuit;
3, larger transient spikes pulse power can be born, be especially suitable for use as anti-thunder device.Such as, the unidirectional transient voltage suppressor TVS of 15KP series can bear 15000W transient spikes pulse power.
Target of the present invention is: according to the feature of electrochemical capacitor and unidirectional transient voltage suppressor TVS, designs a kind of DC power supply having anti-thunder function concurrently, adopt electrochemical capacitor step-down, to make up the deficiency of the DC power supply of existing resistance-capacitance depressurization.
Summary of the invention
The technical scheme that the present invention realizes above-mentioned target is: a kind of holding concurrently can the DC power supply of electrochemical capacitor step-down of anti-thunder, be made up of positive half cycle pressure unit, negative half period pressure unit, the rectification unit having anti-thunder function concurrently, current limliting filtering and voltage regulation unit four part, it is characterized in that:
Described one end of positive half cycle pressure unit is held with the L of AC power supplies and is connected, and the other end is connected with described 11 ends having the rectification unit of anti-thunder function concurrently;
One end of described negative half period pressure unit is held with the N of AC power supplies and is connected, and the other end is connected with described 22 ends having the rectification unit of anti-thunder function concurrently;
Described 33 ends having the rectification unit of anti-thunder function concurrently are connected with described current limliting filtering and voltage regulation unit, and 44 ends are held with common port E and are connected;
Described current limliting filtering and 55 ends of voltage regulation unit had both been held with common port E to be connected and be also connected with one end of load RL and the negative terminal of output voltage VL, and 66 ends are connected with the other end of load RL and the anode of output voltage VL.
Described positive half cycle pressure unit is made up of the first unidirectional transient voltage suppressor TVS1, electrochemical capacitor C1, high frequency capacitance C2, and, one end of the negative pole of the described first unidirectional transient voltage suppressor TVS1, the positive pole of described electrochemical capacitor C1, described high frequency capacitance C2 is all held with the L of AC power supplies and is connected, and the other end of the positive pole of the described first unidirectional transient voltage suppressor TVS1, the negative pole of described electrochemical capacitor C1, described high frequency capacitance C2 is all connected with described 11 ends having the rectification unit of anti-thunder function concurrently.
Described negative half period pressure unit is made up of the second unidirectional transient voltage suppressor TVS2, electrochemical capacitor C4, high frequency capacitance C3, and, one end of the negative pole of the described second unidirectional transient voltage suppressor TVS2, the positive pole of described electrochemical capacitor C4, described high frequency capacitance C3 is all held with the N of AC power supplies and is connected, and the other end of the positive pole of the described second unidirectional transient voltage suppressor TVS2, the negative pole of described electrochemical capacitor C4, described high frequency capacitance C3 is all connected with described 22 ends having the rectification unit of anti-thunder function concurrently.
The described rectification unit having anti-thunder function concurrently is made up of the first rectifier diode D1, the second rectifier diode D2, the 3rd unidirectional transient voltage suppressor TVS3, the 4th unidirectional transient voltage suppressor TVS4, further, they are by the rectification unit having anti-thunder function concurrently described in following two kinds of different method of attachment compositions:
A the negative pole of (), the first described rectifier diode D1, the positive pole of the 3rd described unidirectional transient voltage suppressor TVS3 are all connected with 11 described ends; The negative pole of the second described rectifier diode D2, the positive pole of the 4th described unidirectional transient voltage suppressor TVS4 are all connected with 22 described ends; The positive pole of the first described rectifier diode D1, the positive pole of the second described rectifier diode D2 are all connected with 44 described ends; The negative pole of the 3rd described unidirectional transient voltage suppressor TVS3, the negative pole of the 4th described unidirectional transient voltage suppressor TVS4 are all connected with 33 described ends.
B the positive pole of (), the second described rectifier diode D2, the negative pole of the 4th described unidirectional transient voltage suppressor TVS4 are all connected with 11 described ends; The positive pole of the first described rectifier diode D1, the negative pole of the 3rd described unidirectional transient voltage suppressor TVS3 are all connected with 22 described ends; The negative pole of the first described rectifier diode D1, the negative pole of the second described rectifier diode D2 are all connected with 33 described ends; The positive pole of the 3rd described unidirectional transient voltage suppressor TVS3, the positive pole of the 4th described unidirectional transient voltage suppressor TVS4 are all connected with 44 described ends.
Application the present invention, can obtain following beneficial effect:
1, in described positive half cycle pressure unit, have employed electrochemical capacitor C1, high frequency capacitance C2, circuit that the first unidirectional transient voltage suppressor TVS1 is in parallel, achieve following beneficial effect:
(1) the reverse voltage only 1.2V---i.e. peak forward voltage of the first unidirectional transient voltage suppressor TVS1---that, electrochemical capacitor C1 bears solves the technical problem that the reverse voltage endurance capability of electrochemical capacitor is low;
(2), High-frequency Interference by high frequency capacitance C2 bypass, eliminate the impact of High-frequency Interference on electrochemical capacitor C1;
(3), when the hard pulse arrival of Lightning strike or static discharge (ESD), electrically fast transition (EFT) and the voltage at electrochemical capacitor C1 two ends reaches the puncture voltage UB of the first unidirectional transient voltage suppressor TVS1 time; described TVS1 puncture short; the voltage at described electrochemical capacitor C1 two ends reduces to zero; namely electrochemical capacitor C1 obtains lightning strike protection, makes it exempt from the infringement of hard pulse of poor Lightning strike or static discharge (ESD), electrically fast transition (EFT).
2, in described negative half period pressure unit, have employed the circuit similar to positive half cycle pressure unit, achieve above-described a series of beneficial effect too.
3, the described rectification unit having anti-thunder function concurrently matches with described positive half cycle pressure unit, described negative half period pressure unit; make the DC power supply of indication of the present invention possess the ability of hard pulse of resistance Lightning strike or static discharge (ESD), electrically fast transition (EFT), therefore DC power supply itself and the electronic equipment accepting its power supply receive the protection of anti-thunder.
4, front already described, the CBB60 type electric capacity of 20 μ F/450V is diameters is 40mm, highly for 80mm " huge monster ", price is also up to more than ten yuan.And the electrochemical capacitor of 20 μ F/400V, volume is about 1/10th of the former CBB60 type electric capacity, and price only a few mao, is about the former a thirtieth.
Compared with the DC power supply of the resistance-capacitance depressurization of prior art, the DC power supply due to indication of the present invention have employed the electrochemical capacitor step-down that volume is little, price is low, and therefore volume and cost all decline to a great extent.
Accompanying drawing explanation
Fig. 1 is the DC power supply schematic diagram of conventional capacitance decompression,
Fig. 2 is functional-block diagram of the present invention,
Fig. 3 is V-I performance diagram of unidirectional transient voltage suppressor TVS,
Fig. 4 is the circuit theory diagrams of the preferred embodiment of the invention 1,
Fig. 5 is the equivalent circuit theory figure of embodiment 1 at first positive half cycle,
Fig. 6 is the equivalent circuit theory figure of embodiment 1 at negative half period,
Fig. 7 is the equivalent circuit theory figure of the positive half cycle of embodiment 1 from second positive half cycle
Fig. 8 is the circuit theory diagrams of the preferred embodiment of the invention 2
Fig. 9 is the circuit theory diagrams of the preferred embodiment of the invention 3.
Embodiment
Below, by reference to the accompanying drawings, the present invention is further illustrated.
Composition graphs 2:-kind is held concurrently can the DC power supply of electrochemical capacitor step-down of anti-thunder, is made up of, it is characterized in that positive half cycle pressure unit 101, negative half period pressure unit 102, the rectification unit 103 having anti-thunder function concurrently, current limliting filtering and voltage regulation unit 104 4 part:
Described one end of positive half cycle pressure unit 101 is held with the L of AC power supplies and is connected, and the other end is connected with described 11 ends having the rectification unit 103 of anti-thunder function concurrently;
One end of described negative half period pressure unit 102 is held with the N of AC power supplies and is connected, and the other end is connected with described 22 ends having the rectification unit 103 of anti-thunder function concurrently;
Described 33 ends having the rectification unit 103 of anti-thunder function concurrently are connected with described current limliting filtering and voltage regulation unit 104, and 44 ends are held with common port E and are connected;
Described current limliting filtering and 55 ends of voltage regulation unit 104 had both been held with common port E to be connected and be also connected with one end of load RL and the negative terminal of output voltage VL, and 66 ends are connected with the other end of load RL and the anode of output voltage VL.
Fig. 4 is the circuit theory diagrams of the preferred embodiment of the invention 1.Composition graphs 2, Fig. 4:
Described positive half cycle pressure unit 101 is made up of the first unidirectional transient voltage suppressor TVS1, electrochemical capacitor C1, high frequency capacitance C2, and, one end of the negative pole of the described first unidirectional transient voltage suppressor TVS1, the positive pole of described electrochemical capacitor C1, described high frequency capacitance C2 is all held with the L of AC power supplies and is connected, and the other end of the positive pole of the described first unidirectional transient voltage suppressor TVS1, the negative pole of described electrochemical capacitor C1, described high frequency capacitance C2 is all connected with described 11 ends having the rectification unit 103 of anti-thunder function concurrently.
Described negative half period pressure unit 102 is made up of the second unidirectional transient voltage suppressor TVS2, electrochemical capacitor C4, high frequency capacitance C3, and, one end of the negative pole of the described second unidirectional transient voltage suppressor TVS2, the positive pole of described electrochemical capacitor C4, described high frequency capacitance C3 is all held with the N of AC power supplies and is connected, and the other end of the positive pole of the described second unidirectional transient voltage suppressor TVS2, the negative pole of described electrochemical capacitor C4, described high frequency capacitance C3 is all connected with described 22 ends having the rectification unit 103 of anti-thunder function concurrently.
The described rectification unit 103 having anti-thunder function concurrently is made up of the first rectifier diode D1, the second rectifier diode D2, the 3rd unidirectional transient voltage suppressor TVS3, the 4th unidirectional transient voltage suppressor TVS4, further, the negative pole of the first described rectifier diode D1, the positive pole of the 3rd described unidirectional transient voltage suppressor TVS3 are all connected with 11 described ends; The negative pole of the second described rectifier diode D2, the positive pole of the 4th described unidirectional transient voltage suppressor TVS4 are all connected with 22 described ends; The positive pole of the first described rectifier diode D1, the positive pole of the second described rectifier diode D2 are all connected with 44 described ends; The negative pole of the 3rd described unidirectional transient voltage suppressor TVS3, the negative pole of the 4th described unidirectional transient voltage suppressor TVS4 are all connected with 33 described ends.
In the present embodiment 1, described current limliting filtering and voltage regulation unit 104 are made up of current-limiting resistance R1, filter capacitor C5, filter capacitor C6, voltage stabilizing didoe DW, and, one end of current-limiting resistance R1 is connected with described 33 ends having the rectification unit 103 of anti-thunder function concurrently, and the other end is connected with 66 described ends; The negative pole of one end of filter capacitor C5, the positive pole of filter capacitor C6, voltage stabilizing didoe DW is all connected with 66 described ends; Filter capacitor C5 another-end, the negative pole of filter capacitor C6, the positive pole of voltage stabilizing didoe DW be all connected with 55 described ends; 55 described ends are connected with common port E.
Composition graphs 2, Fig. 4, Fig. 5, the function of high frequency capacitance C2, high frequency capacitance C3 is bypass high frequency, to eliminate the impact of High-frequency Interference on electrochemical capacitor C1 and electrochemical capacitor C4.Because the capacitance of high frequency capacitance C2 is much smaller than the capacitance of electrochemical capacitor C1, the capacitance of high frequency capacitance C3 is much smaller than the capacitance of electrochemical capacitor C4, therefore, high frequency capacitance C2, high frequency capacitance C3 are very micro-on the impact of charge and discharge process of the present invention, can not do to consider.
Composition graphs 4, Fig. 5, after connecting AC voltage, between AC voltage first positive half period, the instantaneous value of AC voltage is V1, and under the driving of this V1, L end is that "+" in high level holds, and N end is the end in low level "-".At this " between AC voltage first positive half period ", the first unidirectional transient voltage suppressor TVS1, the 4th unidirectional transient voltage suppressor TVS4, the first rectifier diode D1 are all in back-biased cut-off state; 3rd unidirectional transient voltage suppressor TVS3, the second unidirectional transient voltage suppressor TVS2, the second rectifier diode D2 are then all in forward biased conducting state.According to the operating state of described associated diodes, " equivalent circuit theory figure " Fig. 5 of first positive half cycle can be obtained.
Composition graphs 5, between first positive half period, charging current i
1along L-C1-TVS3-R1-RL-D2-TVS2-N path flow, this current i
1with the current i on the second unidirectional transient voltage suppressor TVS2
d2substantially equal, i.e. i
1≈ i
d2
Composition graphs 4, Fig. 5, between AC voltage positive half period, along with charging current i
1flowing, AC voltage charges to electrochemical capacitor C1, make this electrochemical capacitor C1 obtain numerical value be V
c1voltage.
Because the second unidirectional transient voltage suppressor TVS2 is in forward biased conducting state, its peak forward voltage V
d2be about 1.2V, i.e. V
d2≈ 1.2V, therefore the reverse voltage that bears of electrochemical capacitor C4 is very low, and only 1.2V, is equivalent to " forward conduction protection " that described electrochemical capacitor C4 receives the second unidirectional transient voltage suppressor TVS2.The circuit design of this " forward conduction protection ", solves the technical problem that electrochemical capacitor can not bear high backward voltage.
On the other hand, because the second unidirectional transient voltage suppressor TVS2 in parallel with described electrochemical capacitor C4 is in forward biased conducting state, therefore, at first positive half cycle, described electrochemical capacitor C4 will enter the state of neither charge " the vacant rest " of also not discharging.Or say, at first positive half cycle, described electrochemical capacitor C4 is uncharged, is " sky ".
Composition graphs 5, be in if ignore the second unidirectional transient voltage suppressor TVS2 of conducting state, the 3rd unidirectional transient voltage suppressor TVS3, the second rectifier diode D2 " peak forward voltage ", then the voltage V on instantaneous value V1, the electrochemical capacitor C1 of output voltage VL, AC voltage
c1between numerical relation be:
VL≈V1－V
C1－i
1R1…………………(1)
In above-mentioned (1) formula, i
1r1 is the voltage on current-limiting resistance R1;
Above-mentioned (1) formula has manifested " step-down " effect of electrochemical capacitor C1, and its voltage fallen is V
c1
Fig. 6 is the equivalent circuit theory figure of embodiment 1 at negative half period.Composition graphs 4, Fig. 6, between the AC voltage negative half period, under the driving of the instantaneous value V2 of AC voltage, N end is that "+" in high level holds, and L end is the end in low level "-".Between this negative half-cycle, the second unidirectional transient voltage suppressor TVS2, the 3rd unidirectional transient voltage suppressor TVS3, the second rectifier diode D2 are all in back-biased cut-off state; First unidirectional transient voltage suppressor TVS1, the 4th unidirectional transient voltage suppressor TVS4, the first rectifier diode D1 are then all in forward biased conducting state.
Front already described, between AC voltage positive half period, AC voltage charges to electrochemical capacitor C1.After entering AC voltage negative half cycle, this electrochemical capacitor C1 will discharge, and discharging current is i
c1because the first unidirectional transient voltage suppressor TVS1 in parallel with this electrochemical capacitor C1 is now in forward biased conducting state; therefore; after described electrochemical capacitor C1 electric discharge terminates, will " the forward conduction protection " of the first unidirectional transient voltage suppressor TVS1 be subject to and enter the state of neither charge " the vacant rest " of also not discharging.
Front already described; between AC voltage positive half period, described electrochemical capacitor C4 accepts " the forward conduction protection " of the second unidirectional transient voltage suppressor TVS2 in parallel with it, is the state of " vacant rest "; therefore, it is " sky " that described electrochemical capacitor C4 is uncharged between positive half period.After entering negative half period, AC voltage charges to it, and making it obtain numerical value is V
c4voltage.
The electric current that AC voltage charges to described electrochemical capacitor C4 is i
2, corresponding with described electrochemical capacitor C1 discharge scenario, this charging current i
2there is following two states in point time domain:
1, in the time domain that described electrochemical capacitor C1 discharges: i
2=i
d1+ i
c1
In above formula, i
d1be the electric current on the second unidirectional transient voltage suppressor TVS2, i
c1for the discharging current of electrochemical capacitor C1.
2, in the time domain after described electrochemical capacitor C1 electric discharge terminates: i
2=i
d1
Fig. 7 is the equivalent circuit theory figure of the positive half cycle of embodiment 1 from second positive half cycle, compared with " the equivalent circuit theory figure of first positive half cycle " shown in Fig. 5, the former Fig. 7 the latter Fig. 5 represents the operating state of embodiment 1 when AC voltage is positive half cycle, difference is: in Figure 5, AC voltage is " first positive half cycle ", and electrochemical capacitor C4 is " sky "; In the figure 7, the negative half period of this electrochemical capacitor C4 after " first positive half cycle " has filled voltage V
c4(see Fig. 6).Except this difference, the course of work of Fig. 7 and Fig. 5 is identical, repeats no more here.
In sum and composition graphs 2, Fig. 4, the following technical characteristic of the present invention can be summed up:
1, at the positive half cycle of AC voltage, the electrochemical capacitor C1 in positive half cycle pressure unit 101 charges, and the electrochemical capacitor C4 in negative half period pressure unit 102 discharges and enters the state of " vacant rest ".
2, at the negative half period of AC voltage, the electrochemical capacitor C1 in positive half cycle pressure unit 101 discharges and enters the state of " vacant rest ", and the electrochemical capacitor C4 in negative half period pressure unit 102 charges.
In brief: at positive half cycle, electrochemical capacitor C1 charges, and has a rest after electrochemical capacitor C4 discharges;
At negative half period, electrochemical capacitor C4 charges, and has a rest after electrochemical capacitor C1 discharges.
3, at the positive half cycle of AC voltage, described electrochemical capacitor C4 accepts " the forward conduction protection " of the second unidirectional transient voltage suppressor TVS2;
4, at the negative half period of AC voltage, described electrochemical capacitor C1 accepts " the forward conduction protection " of the first unidirectional transient voltage suppressor TVS1.
In brief: at positive half cycle, electrochemical capacitor C4 accepts " the forward conduction protection " of diode TVS2;
At negative half period, electrochemical capacitor C1 accepts " the forward conduction protection " of diode TVS1.
Below, composition graphs 4 sets forth anti-lightning function of the present invention:
1, when L end be high level, N end is low level Lightning strike or static discharge (ESD), the forward hard pulse of electrically fast transition (EFT) (being called for short forward thunderbolt pulse) arrives time:
Second unidirectional transient voltage suppressor TVS2, the 3rd unidirectional transient voltage suppressor TVS3 are forward biased conducting state;
Composition graphs 3, Fig. 4 again, by the effect of above-mentioned forward hard pulse, the-unidirectional transient voltage suppressor TVS1 is in back-biased state.Now, if described hard pulse has reached the intensity enough damaging subsequent device, so, the reverse bias voltage of described the-unidirectional transient voltage suppressor TVS1 will reach the value of its reverse breakdown voltage UB, and diode TVS1 is just conducting state because of reverse breakdown;
In like manner, by the effect of above-mentioned hard pulse, the 4th unidirectional transient voltage suppressor TVS4 is also conducting state because of reverse breakdown;
Front already described, transient voltage suppressor can bear larger transient spikes pulse power, is especially suitable for use as anti-thunder device.Such as, the unidirectional transient voltage suppressor TVS of 15KP series can bear 15000W transient spikes pulse power.
After above-mentioned hard pulse arrival, described diode TVS2, diode TVS3 are forward biased conducting state, described diode TVS1, diode TVS4 back-biasedly puncture conducting state, therefore, By Impulsive Current will be held along L, and---------path flow that TVS4---TVS2---N holds, that is: forward thunderbolt pulse current only flows TVS3 TVS1 between TVS1 ~ TVS4 tetra-unidirectional transient voltage suppressor.
2, when N end be high level, L end is low level Lightning strike or static discharge (ESD), the reverse hard pulse of electrically fast transition (EFT) (being called for short pulse of being oppositely struck by lightning) arrives time, the---TVS2---TVS4---path flow of TVS3---TVS1---L end of can reaching a conclusion by above-mentioned same analytical method: described reverse thunderbolt pulse current will be held along N.
In sum; the By Impulsive Current of Lightning strike or static discharge (ESD), electrically fast transition (EFT) only flows through first to fourth described these four unidirectional transient voltage suppressor and can not flow to other devices, and therefore the DC power supply of indication of the present invention and the electronic equipment accepting its power supply receive " anti-thunder protection ".
Fig. 8 is the circuit theory diagrams of the preferred embodiment of the invention 2.Compared with the circuit of embodiment 1, the present embodiment has moved the position of the first rectifier diode D1, the 4th unidirectional transient voltage suppressor TVS4 mutually, also moved the position of the second rectifier diode D2, the 3rd unidirectional transient voltage suppressor TVS3 simultaneously mutually, the method for attachment of four diodes had concurrently in the rectification unit 103 of anti-thunder function has been become: the negative pole of the 4th unidirectional transient voltage suppressor TVS4, the positive pole of the second rectifier diode D2 are all connected with 11 described ends; The negative pole of the 3rd unidirectional transient voltage suppressor TVS3, the positive pole of the first rectifier diode D1 are all connected with 22 described ends; The negative pole of the first rectifier diode D1, the negative pole of the second rectifier diode D2 are all connected with 33 described ends; The positive pole of the 4th unidirectional transient voltage suppressor TVS4, the positive pole of the 3rd unidirectional transient voltage suppressor TVS3 are all connected with 44 described ends.
Those skilled in the art is not difficult to analyze, and after the present embodiment has done above-mentioned change, its operation principle, the course of work, anti-thunder function are still identical with embodiment 1.
Fig. 9 is the circuit theory diagrams of the preferred embodiment of the invention 3.Compared with the circuit of embodiment 1, the present embodiment has done following change:
(1) move the position of the first rectifier diode D1, the 4th unidirectional transient voltage suppressor TVS4, mutually, also move the position of the second rectifier diode D2, the 3rd unidirectional transient voltage suppressor TVS3 simultaneously mutually;
(2), the voltage stabilizing didoe DW in " current limliting filtering and voltage regulation unit 104 " is changed into integrated three-terminal regulator IC1.
It should be appreciated by those skilled in the art, after the present embodiment has done above-mentioned change, its operation principle, the course of work, anti-thunder function are still identical with embodiment 1.
Disclosed above technical scheme of the present invention, and be illustrated by embodiment.Those skilled in the art are to be understood that: described embodiment is of the present invention illustrating; not limit the invention in the scope described by described embodiment; all training centres according to the present invention do modification, amendment or substitute, all should in the protection range that the present invention " claims " define.
Claims (2)
1. one kind hold concurrently can the DC power supply of electrochemical capacitor step-down of anti-thunder, be made up of positive half cycle pressure unit, negative half period pressure unit, the rectification unit having anti-thunder function concurrently, current limliting filtering and voltage regulation unit four part, it is characterized in that: described one end of positive half cycle pressure unit is held with the L of AC power supplies and is connected, the other end is connected with the described first input end (11) having the rectification unit of anti-thunder function concurrently; One end of described negative half period pressure unit is held with the N of AC power supplies and is connected, and the other end is connected with described the second input (22) having the rectification unit of anti-thunder function concurrently; Described the first output (33) having the rectification unit of anti-thunder function concurrently is connected with described current limliting filtering and voltage regulation unit, and described the second output (44) having the rectification unit of anti-thunder function concurrently is held with common port (E) and is connected; The earth terminal (55) of described current limliting filtering and voltage regulation unit had both been connected with common port (E) and had also been connected with one end of load RL and the negative terminal of output voltage VL, and the output (66) of described current limliting filtering and voltage regulation unit is connected with the other end of load RL and the anode of output voltage VL; Wherein,
Described current limliting filtering and voltage regulation unit are made up of current-limiting resistance R1, filter capacitor C5, filter capacitor C6, voltage stabilizing didoe DW, and, one end of current-limiting resistance R1 is connected with described the first output (33) having the rectification unit of anti-thunder function concurrently, and the other end is connected with the output (66) of described current limliting filtering and voltage regulation unit; The negative pole of one end of filter capacitor C5, the positive pole of filter capacitor C6, voltage stabilizing didoe DW is all connected with the output (66) of described current limliting filtering and voltage regulation unit; The positive pole of the other end of filter capacitor C5, the negative pole of filter capacitor C6, voltage stabilizing didoe DW is all connected with the earth terminal (55) of described current limliting filtering and voltage regulation unit; The earth terminal (55) of described current limliting filtering and voltage regulation unit is connected with common port (E);
Wherein, described positive half cycle pressure unit is by the first unidirectional transient voltage suppressor TVS1, electrochemical capacitor C1, high frequency capacitance C2 forms, and, the negative pole of the described first unidirectional transient voltage suppressor TVS1, the positive pole of described electrochemical capacitor C1, one end of described high frequency capacitance C2 is all held with the L of AC power supplies and is connected, the positive pole of the described first unidirectional transient voltage suppressor TVS1, the negative pole of described electrochemical capacitor C1, the other end of described high frequency capacitance C2 is all held with the described first input end (11) having the rectification unit of anti-thunder function concurrently and is connected,
Described negative half period pressure unit is made up of the second unidirectional transient voltage suppressor TVS2, electrochemical capacitor C4, high frequency capacitance C3, and, one end of the negative pole of the described second unidirectional transient voltage suppressor TVS2, the positive pole of described electrochemical capacitor C4, described high frequency capacitance C3 is all held with the N of AC power supplies and is connected, and the other end of the positive pole of the described second unidirectional transient voltage suppressor TVS2, the negative pole of described electrochemical capacitor C4, described high frequency capacitance C3 is all connected with described the second input (22) having the rectification unit of anti-thunder function concurrently.
2. as claimed in claim 1 holding concurrently can the DC power supply of electrochemical capacitor step-down of anti-thunder, it is characterized in that:
Wherein, the rectification unit having anti-thunder function concurrently is made up of the first rectifier diode D1, the second rectifier diode D2, the 3rd unidirectional transient voltage suppressor TVS3, the 4th unidirectional transient voltage suppressor TVS4, further, the connected mode having the rectification unit of anti-thunder function described in concurrently for following the two one of:
A the negative pole of (), the first described rectifier diode D1, the positive pole of the 3rd described unidirectional transient voltage suppressor TVS3 are all connected with described first input end (11); The negative pole of the second described rectifier diode D2, the positive pole of the 4th described unidirectional transient voltage suppressor TVS4 are all connected with described the second input (22); The positive pole of the first described rectifier diode D1, the positive pole of the second described rectifier diode D2 are all connected with described the second output (44); The negative pole of the 3rd described unidirectional transient voltage suppressor TVS3, the negative pole of the 4th described unidirectional transient voltage suppressor TVS4 are all connected with described the first output (33);
B the positive pole of (), the second described rectifier diode D2, the negative pole of the 4th described unidirectional transient voltage suppressor TVS4 are all connected with described first input end (11); The positive pole of the first described rectifier diode D1, the negative pole of the 3rd described unidirectional transient voltage suppressor TVS3 are all connected with described the second input (22); The negative pole of the first described rectifier diode D1, the negative pole of the second described rectifier diode D2 are all connected with described the first output (33); The positive pole of the 3rd described unidirectional transient voltage suppressor TVS3, the positive pole of the 4th described unidirectional transient voltage suppressor TVS4 are all held with described the second output (44) and are connected.
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| CN201410318939.2A CN104052311B (en) | 2014-07-06 | 2014-07-06 | Holding concurrently can the DC power supply of electrochemical capacitor step-down of anti-thunder |
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| CN201410318939.2A CN104052311B (en) | 2014-07-06 | 2014-07-06 | Holding concurrently can the DC power supply of electrochemical capacitor step-down of anti-thunder |
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| CN102984864B (en) * | 2012-12-12 | 2014-09-17 | 宁波市镇海华泰电器厂 | LED lamp driving power supply with lightning protection and automatic temperature control functions |
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