CN101510690A - Nonpolarity active electrolytic capacitor - Google Patents
Nonpolarity active electrolytic capacitor Download PDFInfo
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- CN101510690A CN101510690A CNA2009100683981A CN200910068398A CN101510690A CN 101510690 A CN101510690 A CN 101510690A CN A2009100683981 A CNA2009100683981 A CN A2009100683981A CN 200910068398 A CN200910068398 A CN 200910068398A CN 101510690 A CN101510690 A CN 101510690A
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- electrolytic capacitor
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
Abstract
The invention discloses a nonpolarity active electrolytic capacitor, which comprises two electrolytic capacitors with the same parameters, two semiconductor diodes with the same parameters, two control elements for semiconductor power and a synchronous driven circuit with positive half perimeter and negative half perimeter. The active electrolytic capacitor adopts the two semiconductor diodes to charge the two electrolytic capacitors respectively in a way of positive half perimeter and negative half perimeter and uses the two control elements for semiconductor power to respectively control the two electrolytic capacitors to discharge, thereby finishing the charge-discharge process of the two electrolytic capacitors and realizing the work of electrolytic capacitors on alternating current. The nonpolarity active electrolytic capacitor doubles the utilization ratio of existing alternating electrolytic capacitors and has the advantages of long-term working on alternating current, low wear and tear and the like. The nonpolarity active electrolytic capacitor can be widely applied to electric power-factor compensation and condenser motors and can promote the power factors of grid, save electrical energy and enhance the efficiency.
Description
Technical field
The invention belongs to power electronic device, be specially a kind of Nonpolarity active electrolytic capacitor that can in alternating current circuit, work.Be applicable on the equipment of the power factor compensation that utilizes capacitor to carry out electric power system and step-down.
Background technology
The power capacitor that is used for alternating current circuit all is to add the dielectric formation in the middle of adopting double-layer aluminum-foil, owing to dielectric layer can not be done very thin, the pole plate area is made very greatly, cause the capacitance of capacitor little, volume is very big, consumable material is many, cost is high, its extensive use is caused certain limitation, especially improve applying of power factor and cause difficulty to electric power system.Electrolytic capacitor as positive pole, uses negative plate and electrolyte as negative pole with valve metal.At first on negative plate and positive plate working face, corrode to increase polar board surface long-pending, surperficial at positive pole again with the dielectric of electrochemical method generation oxidation film layer as capacitor.Because the distance between two-plate is short, and oxide-film dielectric constant height, therefore the capacitance of electrolytic capacitor is than a lot of greatly with the capacitance of the common power capacitor of volume, the energy of the electric power of unit volume storage is tens times of ordinary capacitor, has that volume is little, self-healing property good, capacity is big, low cost and other advantages.But electrolytic capacitor only is adapted at working in the DC circuit, even the simple series connection of so-called non-polar two electrolytic capacitors can be used for alternating current circuit, yet because condenser loss is big, also can only short time or intermittent work.And the capacitance of the actual use of this electrolytic capacitor is half of capacitance of two identical parameters capacitors, therefore reduced the utilance of capacitor, causes range of application to be restricted.
Summary of the invention
In order to address the above problem, the invention provides a kind of Nonpolarity active electrolytic capacitor, the existing electrolytic capacitor volume of utilization is little, capacity is big, cost hangs down advantages such as reaching economical with materials and the characteristic of semiconductor diode unilateal conduction makes up, two electrolytic capacitors adopt altogether, and negative pole connects, the switch that drives active control element by synchronous drive circuit is controlled the discharge of two electrolytic capacitors respectively, and then makes a kind of Nonpolarity active electrolytic capacitor.Because each element is half period work, will improve the useful life of this element.This Nonpolarity active electrolytic capacitor can be worked in alternating current circuit; Two control elements discharge to two electrolytic capacitors respectively, have improved the utilance of capacitor, and its capacitance is the single capacitance of two same capability capacitors, and are bigger one times than the capacitance of existing alternating current electrolysis capacitor.
The technical solution adopted for the present invention to solve the technical problems is: a kind of Nonpolarity active electrolytic capacitor, be by the electrolytic capacitor of two identical parameters, the semiconductor diode of two identical parameters, the semiconductor power control element of two identical parameters and positive and negative half cycle synchronous drive circuit are formed.The annexation of circuit is: the lead-in wire (15) of the emitter of the positive pole of electrolytic capacitor (9), semiconductor diode (7) negative pole, semiconductor power control element (5), the lead-in wire (11) of negative half period synchronous drive circuit (3), positive half cycle synchronous drive circuit (4) is connected with each other and is the contact conductor (1) of described non-polarized electrolytic capacitor; The lead-in wire (14) of the emitter of the negative pole of the positive pole of electrolytic capacitor (10), semiconductor diode (8), semiconductor power control element (6), positive half cycle synchronous drive circuit (4), the lead-in wire (12) of negative half period synchronous drive circuit (3) are connected with each other and are the contact conductor (2) of described non-polarized electrolytic capacitor; The collector electrode of the positive pole of the negative pole of two electrolytic capacitors (9), (10), two semiconductor diodes (7), (8), two semiconductor power control elements (5), (6) interconnects; The lead-in wire (13) of negative half period synchronous drive circuit (3) is connected with the base stage of semiconductor diode power control member (5); The lead-in wire (16) of positive half cycle synchronous drive circuit (4) is connected with the base stage of semiconductor power control element (6).Described semiconductor power control element can be a kind of in transistor, IGBT, VMOSFET, thyristor, the gate turn off thyristor.As adopt transistor then to have advantage of simple structure; As adopt the VMOSFET power field effect transistor as the semiconductor power control element, then have and open the little advantage of resistance, but driving voltage needs to adopt independent power supply power supply between 10-20V; As adopt thyristor as the semiconductor power control element, then have withstand voltage height, advantage that operating current is big, but drive circuit need design by the gate pole requirement.Described Nonpolarity active electrolytic capacitor, can be formed by connecting with lead by discrete element, also can lump together, only draw (1) and (2) two electrical leads by two electrolytic capacitors, two semiconductor diodes, two semiconductor power controlling devices and two synchronous drive circuit package group.Described Nonpolarity active electrolytic capacitor operation principle is: with the work of individual event alternating current is example, see Fig. 2, when the positive half period of AC power E is worked, electric current returns power supply E through the positive best negative pole of electrolytic capacitor (9) to the positive best negative pole of semiconductor diode (8), electrolytic capacitor (9) is constituted the loop, power supply E charges to electrolytic capacitor (9), semiconductor diode this moment (7) ends, the forward voltage drop tube 0.7-1.2 volt that on electrolytic capacitor (10), has only semiconductor diode (8), driving power control element (6) conducting of synchronous drive circuit this moment (4), when the voltage of power supply E is lower than the both end voltage of capacitor (9), capacitor (9) discharges electric energy to power supply E through power control member (6), finishes positive half period work.When the work of the negative half-cycle of power supply E, electric current returns power supply E formation loop through the positive best negative pole of electrolytic capacitor (10) to the positive best negative pole of semiconductor diode (7), and electrolytic capacitor (10) is charged; When the voltage of power supply E is lower than the both end voltage of electrolytic capacitor (10), synchronous drive circuit (3) driving power control element (5) conducting, electrolytic capacitor (10) discharges electric energy to power supply E through power control member (5), finish negative half-cycle work, and then realized the course of work of Nonpolarity active electrolytic capacitor.Semiconductor diode plays rectified action on the one hand, and the electrolytic capacitor working inverse voltage can be clamped at semiconductor diode forward conduction voltage on the other hand is in the tube voltage drop value scope, plays the effect of protection electrolytic capacitor reverse voltage breakdown potential pole plate.Two synchronous drive circuits and the positive and negative cycle synchronisation of power supply are carried out, respectively the unlatching and the shutoff of drive controlling element.When working under high voltage, big current conditions, for avoiding burning Nonpolarity active electrolytic capacitor, need to adopt series inductance L1 and L2 to limit electric current rate over time, capacitor C is used for the absorbing high-frequency surge voltage and is provided with.When the work period is tens kilocycles, should select fast quick-recovery N-type semiconductor N diode for use, the working loss during with minimizing semiconductor diode switch helps protecting electrolytic capacitor.Because tube voltage drop 0.7-1.2V is about the 0.2-0.5% of 220 volts of supply voltages and 380 volts, can ignore than its loss of raising power factor 20-30%.Because every electrolytic capacitor and every semiconductor diode all are half period work, will improve the useful life of element greatly.Described Nonpolarity active electrolytic capacitor can be worked on single-phase and two-phase equipment, and the triangle that also can carry out three-phase alternating current connects and Y-connection, can also carry out six phases, 12 and equate heterogeneous connection.
The invention has the beneficial effects as follows: two semiconductor diodes align respectively with negative half period and carry out rectification, electrolytic capacitor is charged, utilize the conducting of semiconductor power control element to discharge the electric energy that is stored in electrolytic capacitor, realized the course of work of alternating current charge and discharge process and Nonpolarity active electrolytic capacitor.Owing to should adopt the electrolytic capacitor of the big and anti-big ripple of shock-resistant electric current, improve the useful life and the reliability of no Nonpolarity active electrolytic capacitor.The characteristic of utilizing semiconductor diode oppositely to end, blocked the reverse voltage that is added in the electrolytic capacitor two ends, and play clamping action during diode current flow, electrolytic capacitor two ends reverse voltage is clamped in the diode tube pressuring drop scope, overcome the shortcoming that electrolytic capacitor can not bear reverse voltage, realized that Nonpolarity active electrolytic capacitor directly works in alternating current circuit.Compare with general alternating current electrolysis capacitor, the utilance of capacitor doubles; The capacitance of unit volume is tens times of identical parameters ordinary capacitor capacitance, and cost is low, has only with 1/tens of capacity ordinary capacitor.This electrolytic capacitor can be the electric power system power factor compensation more practical product is provided, and capacitor has the big advantage of the surge current of absorption, can reduce the damage that the electrical network surge voltage causes equipment, can improve the electrical network quality.Work as Nonpolarity active electrolytic capacitor being used in the single-phase capacitance startup formula alternating current motor, after finishing motor start-up, capacitor can work on, to improve output power of motor and service efficiency greatly, and have reducing cost, reduce failure rate and improve advantage such as useful life.Can utilize this Nonpolarity active electrolytic capacitor instead of transformers and resistance-type step-down, carry out the condenser type step-down, will have advantages such as the volume of reduction equipment, the power factor (PF) that improves electrical network and saves energy.
Description of drawings:
Fig. 1 Nonpolarity active electrolytic capacitor structural representation
The semiconductor power control element of Fig. 2 Fig. 1 adopts the structural representation of transistor
The semiconductor power control element of Fig. 3 Fig. 1 adopts the structural representation of VMOSFET
The semiconductor power control element of Fig. 4 Fig. 1 adopts the structural representation of thyristor
Number in the figure:
1,2 contact conductors 3, negative half period synchronous drive circuit 4, positive half cycle synchronous drive circuit 5,6 semiconductor power control elements 7,8 semiconductor diodes 9,10 electrolytic capacitors 11,12,13, negative half period synchronous drive circuit lead-in wire 14,15,16, positive half cycle synchronous drive circuit lead-in wire
Embodiment
Embodiment 1
See also Fig. 1 and Fig. 2, Nonpolarity active electrolytic capacitor is made up of the semiconductor power control element and the positive and negative half cycle synchronous drive circuit of the semiconductor diode of the electrolytic capacitor of two identical parameters, two identical parameters, two identical parameters.The annexation of circuit is: the lead-in wire (15) of the lead-in wire (11) of the negative pole of the positive pole of electrolytic capacitor (9), semiconductor diode (7), the emitter of semiconductor power control element (5), negative half period synchronous drive circuit (3), positive half cycle synchronous drive circuit (4) is connected with each other and is the contact conductor (1) of described non-polarized electrolytic capacitor; The lead-in wire (14) of the emitter of the negative pole of the positive pole of electrolytic capacitor (10), semiconductor diode (8), semiconductor power control element (6), positive half cycle synchronous drive circuit (4), the lead-in wire (12) of negative half period synchronous drive circuit (3) are connected with each other and are the contact conductor (2) of described non-polarized electrolytic capacitor; The collector electrode of the positive pole of the negative pole of two electrolytic capacitors (9), (10), two semiconductor diodes (7), (8), two semiconductor power control elements (5), (6) interconnects; The lead-in wire (13) of negative half period synchronous drive circuit (3) is connected with the base stage of semiconductor diode power control member (5); The lead-in wire (16) of positive half cycle synchronous drive circuit (4) is connected with the base stage of semiconductor power control element (6).The semiconductor power control element adopts transistor, has advantage of simple structure.Described Nonpolarity active electrolytic capacitor, can be formed by connecting with lead by discrete element, also can lump together, only draw (1) and (2) two electrical leads by two electrolytic capacitors, two semiconductor diodes, two semiconductor power controlling devices and two synchronous drive circuit package group.
See also Fig. 3, the connected mode of IGBT or VMOSFET is adopted in Nonpolarity active electrolytic capacitor power control member (5) and (6), have and open the little advantage of resistance, but driving voltage needs to adopt independent power supply power supply between 10-20V, and other is with embodiment 1.
Example 3
See also Fig. 4, the connected mode of thyristor or gate turn off thyristor is adopted in the power control member of non-polarized electrolytic capacitor (5) and (6), have withstand voltage height, advantage that operating current is big, but drive circuit need design by the gate pole requirement, other is with embodiment 1.
Claims (4)
1, a kind of Nonpolarity active electrolytic capacitor is characterized in that this electrolytic capacitor is made up of the semiconductor diode of the electrolytic capacitor of two identical parameters, two identical parameters, two semiconductor power control elements, positive-negative half-cycle synchronous drive circuits.
2, Nonpolarity active electrolytic capacitor according to claim 1 is characterized in that: the lead-in wire (15) of the lead-in wire (11) of the negative pole of the positive pole of electrolytic capacitor (9), semiconductor diode (7), the emitter of semiconductor power control element (5), negative half period synchronous drive circuit (3), positive half cycle synchronous drive circuit (4) is connected with each other as the contact conductor (1) of described Nonpolarity active electrolytic capacitor; The lead-in wire (14) of the emitter of the negative pole of the positive pole of electrolytic capacitor (10), semiconductor diode (8), semiconductor power control element (6), positive half cycle synchronous drive circuit (4), the lead-in wire (12) of negative half period synchronous drive circuit (3) are connected with each other and are the contact conductor (2) of described Nonpolarity active electrolytic capacitor; The collector electrode of the positive pole of the negative pole of electrolytic capacitor (9) and electrolytic capacitor (10), semiconductor diode (7) and semiconductor diode (8), semiconductor power control element (5) and semiconductor power control element (6) interconnects; The lead-in wire (13) of negative half period synchronous drive circuit (3) is connected with the base stage of semiconductor power control element (5), and the lead-in wire (16) of positive half cycle synchronous drive circuit (4) is connected with the base stage of semiconductor power control element (6).
3, Nonpolarity active electrolytic capacitor according to claim 1 is characterized in that: a kind of in transistor, IGBT, VMOSFET, thyristor, the gate turn off thyristor can adopt for described semiconductor power control element (5) and (6).
4, Nonpolarity active electrolytic capacitor according to claim 1 is characterized in that: described electrolytic capacitor can be formed by connecting with lead by discrete element; Also can lump together by two electrolytic capacitors (9) and (10), two semiconductor diodes (7) and (8), two semiconductor power control elements (5) and (6), positive-negative half-cycle synchronous drive circuit (3) and (4) package group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100683981A CN101510690A (en) | 2009-04-07 | 2009-04-07 | Nonpolarity active electrolytic capacitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100683981A CN101510690A (en) | 2009-04-07 | 2009-04-07 | Nonpolarity active electrolytic capacitor |
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| CN101510690A true CN101510690A (en) | 2009-08-19 |
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| CNA2009100683981A Pending CN101510690A (en) | 2009-04-07 | 2009-04-07 | Nonpolarity active electrolytic capacitor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101789603A (en) * | 2010-03-17 | 2010-07-28 | 天津理工大学 | Method and circuit for alternating-current dynamic active power factor compensation |
| CN107546040A (en) * | 2016-06-29 | 2018-01-05 | 武汉华易科技有限公司 | Active AC capacitor |
-
2009
- 2009-04-07 CN CNA2009100683981A patent/CN101510690A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101789603A (en) * | 2010-03-17 | 2010-07-28 | 天津理工大学 | Method and circuit for alternating-current dynamic active power factor compensation |
| CN101789603B (en) * | 2010-03-17 | 2012-06-27 | 天津理工大学 | Method and circuit for alternating-current dynamic active power factor compensation |
| CN107546040A (en) * | 2016-06-29 | 2018-01-05 | 武汉华易科技有限公司 | Active AC capacitor |
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Application publication date: 20090819 |