CN201893725U - High-efficiency pulse discharge circuit based on unipolarity capacitor - Google Patents
High-efficiency pulse discharge circuit based on unipolarity capacitor Download PDFInfo
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- CN201893725U CN201893725U CN2010206147967U CN201020614796U CN201893725U CN 201893725 U CN201893725 U CN 201893725U CN 2010206147967 U CN2010206147967 U CN 2010206147967U CN 201020614796 U CN201020614796 U CN 201020614796U CN 201893725 U CN201893725 U CN 201893725U
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Abstract
The utility model relates to a high-efficiency pulse discharge circuit based on a unipolarity capacitor, comprising a control circuit. A signal input end of the control circuit receives external trigger signals, and a signal output end of the control circuit is connected with a pulse discharge loop through a drive circuit. The pulse discharge loop comprises an electrolytic capacitor C and an inductance L, and a charging circuit charges the pulse discharge loop. In the high-efficiency pulse discharge circuit, the unipolarity capacitor, i.e. the electrolytic capacitor C is adopted as long-term and reliable energy-storage element, the problem that reverse voltage is formed on an energy-storage capacitor when discharge is finished, and the long-term reliability of the circuit elements and the integral circuit is improved. In addition, the structure of the discharge circuit provided by the utility model has the characteristic of energy recovery, so that the energy-saving effect in great-quantity popularization and application is obvious.
Description
Technical field
The utility model relates to a kind of discharge circuit, especially a kind of high-efficiency pulse discharge circuit based on unipolarity electric capacity.
Background technology
In the design of load characteristic based on the macro-energy pulse power circuit of perception, usually adopt the capacitor energy storage of charging, after charging to certain voltage, can pass through storage capacitor the controllable silicon (SCR) of big electric current as discharge switch, inductive load is triggered discharge, to obtain corresponding pulse current output.Based on the pulse discharge circuit of this technical scheme, can be after discharge process finishes because the existence of inductive load inverse electromotive force form reverse voltage on storage capacitor, and the condition of work of reverse voltage will have influence on the steady operation of some types of capacitors.Therefore under this occasion condition, require storage capacitor to possess the energy storage of the macro-energy of realization, can carry out the heavy current pulse discharge, can bear three key characteristics such as working inverse voltage again.
In existing design process, address the above problem by following two kinds of approach:
The first, employing can be born the polarity free capacitor of reverse voltage as storage capacitor, and only film capacitor is proper according to present device development level.Yet the specific energy of film capacitor (energy storage density) is lower, and the volume of electric capacity is a lot of greatly under the identical energy storage condition, and film capacitor is compared with common electrolytic capacitor on the present market, and the film capacitor volume under the identical energy storage condition is big approximately 10 times or more.
The second, adopt electrochemical capacitor as storage capacitor, because electrochemical capacitor is a unipolarity electric capacity, need carry out clamp with big capacity diode pair reverse voltage.This method can use the less electrochemical capacitor of volume as storage capacitor, yet because the existence of diode self conduction voltage drop, still have during end-of-pulsing faint reverse voltage to exist in output, the existence of this faint reverse voltage is unfavorable for that electrochemical capacitor for a long time, work reliably.
The utility model content
The purpose of this utility model is to provide a kind of unipolarity electric capacity that adopts can avoid forming reverse voltage, energy-saving effect as energy-storage travelling wave tube, when discharge finishes significantly based on the high-efficiency pulse discharge circuit of unipolarity electric capacity on unipolarity electric capacity.
For achieving the above object, the utility model has adopted following technical scheme: a kind of high-efficiency pulse discharge circuit based on unipolarity electric capacity, comprise control circuit, the signal input part of control circuit receives outer triggering signal, the signal output part of control circuit links to each other with the pulsed discharge loop by drive circuit, described pulsed discharge loop comprises electrochemical capacitor C and inductance L, the charging of charging circuit paired pulses discharge loop.
As shown from the above technical solution, the utility model adopts unipolarity electric capacity---electrochemical capacitor C conduct energy-storage travelling wave tube reliably and with long-term, solve the problem that on electrochemical capacitor C, forms reverse voltage when discharge finishes, improved the long-term reliability of circuit element and integrated circuit.Simultaneously, the discharge circuit that this utility model proposed has the energy recuperation characteristic, and energy-saving effect is obvious when carrying out the large-scale popularization application.
Description of drawings
Fig. 1 is a circuit block diagram of the present utility model;
Fig. 2 is circuit theory diagrams of the present utility model;
When Fig. 3 is discharge regime I, the current in loop oscillogram;
When Fig. 4 is discharge regime II, the current in loop oscillogram.
Embodiment
A kind of high-efficiency pulse discharge circuit based on unipolarity electric capacity, comprise control circuit 2, the signal input part of control circuit 2 receives outer triggering signal, the signal output part of control circuit 2 links to each other with pulsed discharge loop 4 by drive circuit 3, described pulsed discharge loop 4 comprises electrochemical capacitor C and inductance L, 4 chargings of charging circuit 1 paired pulses discharge loop, as shown in Figure 1, 2.
As shown in Figure 1, 2, described pulsed discharge loop 4 is made up of electrochemical capacitor C, switching tube V1, switching tube V2, diode D1, diode D2 and inductance L, described electrochemical capacitor C adopts the electrochemical capacitor of an electrochemical capacitor or a plurality of parallel connections, and described switching tube V1, V2 all adopt igbt transistor.For jumbo capacitive load, charging circuit 1 adopts the constant current charge circuit with Short Circuit withstand characteristic, switching tube V1, V2 also can select power insulated gate field effect transistor MOSFET, device such as full control such as turn-off thyristor GTO, integrated gate commutated thyristor IGCT etc. that contact capacity is bigger for use, and diode D1, D2 select for use capacity to get final product greater than the diode of the pulse output current of circuit requirement.Select the electrochemical capacitor that is fit to of rated voltage and capacity according to the pulse demand, adopt many electrochemical capacitor parallel operations if demand capacity is big or the output pulse current is higher.
As shown in Figure 1, 2, described electrochemical capacitor C is connected across on the charging circuit 1, the end of electrochemical capacitor C links to each other with the collector electrode of switching tube V1, the emitter of switching tube V1 links to each other with the negative electrode of inductance L with diode D1 respectively, the other end of inductance L links to each other with the anode of diode D2 and the collector electrode of switching tube V2 respectively, the signal output part of described drive circuit 3 links to each other with the grid of switching tube V1, V2 respectively, the anode of described diode D1 links to each other with the emitter of switching tube V2 with electrochemical capacitor C respectively, and the collector electrode of switching tube V1 links to each other with the negative electrode of diode D2.
At discharge regime I, i.e. during discharge beginning, control circuit 2 receives outside triggering signal and sends and controls signal to drive circuit 3, and by drive circuit 3 driving switch pipe V1, V2, makes switching tube V1, V2 conducting simultaneously.Switching tube V1, V2 enter conducting state and form the current path I later on: electrochemical capacitor C-switching tube V1-inductance L-switching tube V2-electrochemical capacitor C, this current path I constitutes discharge loop discharges, and current waveform as shown in Figure 3 in this stage loop.
At discharge regime II, because the control signal width that control circuit 2 provides equals pulsed discharge loop 4 from the zero time that reaches current peak, therefore, when impulse discharge current reaches maximum, control circuit 2 turn-offs simultaneously by drive circuit 3 control switch pipe V1, V2, and this moment, the current path I was interrupted because turn-off switching tube V1, V2 the time.When pulsed discharge loop 4 output loadings when being main with perception, the pulse duration of output discharge pulse is determined jointly by electrochemical capacitor C and inductance L that mainly pulsed discharge loop 4 can be reduced to a LC second order discharge loop.Can be defined as 1/4 of the LC second order discharge loop cycle this moment with the width of control circuit 2 output control signals, like this when switching tube V1, V2 turn-off simultaneously, the output current in pulsed discharge loop 4 is in peak point just, and the voltage on the electrochemical capacitor C is put into 0V just.Yet because inductive load---the existence of inductance L, electric current by inductance L can't be reduced to zero suddenly, therefore can form the current path II by diode D1, D2 in the pulsed discharge loop 4: inductance L-diode D2-electrochemical capacitor C-diode D1-inductance L, current waveform is as shown in Figure 4 in this stage loop.When the electric current of inductance L is decreased to after 0, because the current path I has been turn-offed this moment and the unilateral conduction of current path II, electric current will no longer flow, and discharge process finishes.
When discharge finished, the residual amount of energy in the inductance L was carried out positive charge by the current path II to electrochemical capacitor C, can make the dump energy of inductance L after pulsed discharge obtain reclaiming, and be stored in again among the electrochemical capacitor C.Before the 4 times tasks in pulsed discharge loop, only need electrochemical capacitor C is carried out the energy requirement that the part charging can reach pulse output, energy-conservation effect is obvious.Change in voltage curve on the electrochemical capacitor C is seen accompanying drawing 10.
The utility model can use the higher electrochemical capacitor C of specific energy (energy storage density) as storage capacitor, can farthest reduce the circuit volume under the identical energy storage condition.Simultaneously in whole discharge process, occur reverse voltage on the electrochemical capacitor C anything but, can avoid using high-power fly-wheel diode that electrochemical capacitor C is carried out clamping protection.Both improved reliability and the useful life of electrochemical capacitor C, further reduced the circuit volume again, and made the pulsed discharge loop go for more pulse application occasion.
Claims (5)
1. high-efficiency pulse discharge circuit based on unipolarity electric capacity, comprise control circuit (2), it is characterized in that: the signal input part of control circuit (2) receives outer triggering signal, the signal output part of control circuit (2) links to each other with pulsed discharge loop (4) by drive circuit (3), described pulsed discharge loop (4) comprises electrochemical capacitor C and inductance L, charging circuit (1) paired pulses discharge loop (4) charging.
2. the high-efficiency pulse discharge circuit based on unipolarity electric capacity according to claim 1 is characterized in that: described pulsed discharge loop (4) is made up of electrochemical capacitor C, switching tube V1, switching tube V2, diode D1, diode D2 and inductance L.
3. the high-efficiency pulse discharge circuit based on unipolarity electric capacity according to claim 1 is characterized in that: described charging circuit (1) is the constant current charge circuit.
4. the high-efficiency pulse discharge circuit based on unipolarity electric capacity according to claim 2 is characterized in that: described electrochemical capacitor C adopts the electrochemical capacitor of an electrochemical capacitor or a plurality of parallel connections, and described switching tube V1, V2 all adopt igbt transistor.
5. according to claim 2 or 4 described high-efficiency pulse discharge circuits based on unipolarity electric capacity, it is characterized in that: described electrochemical capacitor C is connected across on the charging circuit (1), the end of electrochemical capacitor C links to each other with the collector electrode of switching tube V1, the emitter of switching tube V1 links to each other with the negative electrode of inductance L with diode D1 respectively, the other end of inductance L links to each other with the anode of diode D2 and the collector electrode of switching tube V2 respectively, the signal output part of described drive circuit (3) respectively with switching tube V1, the grid of V2 links to each other, the anode of described diode D1 links to each other with the emitter of switching tube V2 with electrochemical capacitor C respectively, and the collector electrode of switching tube V1 links to each other with the negative electrode of diode D2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206147967U CN201893725U (en) | 2010-11-19 | 2010-11-19 | High-efficiency pulse discharge circuit based on unipolarity capacitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206147967U CN201893725U (en) | 2010-11-19 | 2010-11-19 | High-efficiency pulse discharge circuit based on unipolarity capacitor |
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| Publication Number | Publication Date |
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| CN201893725U true CN201893725U (en) | 2011-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010206147967U Expired - Fee Related CN201893725U (en) | 2010-11-19 | 2010-11-19 | High-efficiency pulse discharge circuit based on unipolarity capacitor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102044987A (en) * | 2010-11-19 | 2011-05-04 | 上海容昱电子科技有限公司 | Unipolar capacitor based high-efficiency pulse discharge circuit |
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2010
- 2010-11-19 CN CN2010206147967U patent/CN201893725U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102044987A (en) * | 2010-11-19 | 2011-05-04 | 上海容昱电子科技有限公司 | Unipolar capacitor based high-efficiency pulse discharge circuit |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110706 Termination date: 20151119 |
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| EXPY | Termination of patent right or utility model |