CN202889228U - Double-capacitor twelve-pulse rectifying circuit - Google Patents
Double-capacitor twelve-pulse rectifying circuit Download PDFInfo
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- CN202889228U CN202889228U CN 201220565621 CN201220565621U CN202889228U CN 202889228 U CN202889228 U CN 202889228U CN 201220565621 CN201220565621 CN 201220565621 CN 201220565621 U CN201220565621 U CN 201220565621U CN 202889228 U CN202889228 U CN 202889228U
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Abstract
The utility model provides a double-capacitor twelve-pulse rectifying circuit which comprises a three-phase alternating current power grid, a filtering circuit, a natural rectifier circuit of which the input ends and output ends are connected in parallel, and an ahead rectifying circuit, wherein the input ends of the filtering circuit are connected with the three-phase alternating current power grid; the output ends of the three-phase alternating current power grid are connected with the input ends of the natural rectifier circuit of which the input ends and output ends are connected in parallel and the ahead rectifying circuit; and the output ends of the natural rectifier circuit of which the input ends and the output ends are connected in parallel and the ahead rectifying circuit are connected. The double-capacitor twelve-pulse rectifying circuit is simple in structure, easy in control method and low in cost, straight direct current voltage can be obtained, and the network side power factor of the harmonic current standard is met.
Description
Technical field
The utility model belongs to the converters technical field, relates to a kind of rectified three-phase circuit, particularly relates to a kind of pair of electric capacity twelve-pulse rectification circuit.
Background technology
In household electrical appliance and the field of switch power of relatively high power, such as cabinet-type air conditioner convertible frequency air-conditioner and battery charger, need to adopt the three-phase alternating-current supply power supply, wherein the front stage circuits of the converters that adopts mostly adopts not control rectifying circuit of three-phase.No matter rear class is negative is with for which kind of load, and control rectifying circuit does not all belong to nonlinear load, produces harmonic current and reactive power in the net side, causes the side harmonics electric current to pollute and lower net side power factor, needs to adopt power factor correction technology for this reason.
Active Power Factor Correction Technology can be adopted, also the PPFC (Passive Power Factor Correction) technology can be adopted.For the application of power less, low-cost for price, simplify development process, can adopt the PPFC (Passive Power Factor Correction) technology.Except the power factor correction effect is relatively relatively poor, have the advantages such as simple in structure, that control is easy, therefore still have at present widely application scenario.In PPFC (Passive Power Factor Correction), most of way is to increase inductance on net side line road, carries out harmonic current and suppresses, and its advantage is simple, but calibration result is not very desirable, and inductive drop is larger, has limited load capacity.Need to improve for this reason.
The utility model content
The shortcoming of prior art in view of the above, the purpose of this utility model is to provide a kind of pair of electric capacity twelve-pulse rectification circuit, is used for solving the problem that prior art power factor correction effect is relatively relatively poor, inductive drop is larger.
Reach for achieving the above object other relevant purposes, the utility model provides a kind of pair of electric capacity twelve-pulse rectification circuit, and described pair of electric capacity twelve-pulse rectification circuit comprises: three-phase alternating current electrical network, filter circuit, input and the equal natural commutation device circuit in parallel of output and leading rectification circuit; Wherein, the input of described filter circuit links to each other with the three-phase alternating current electrical network; The output of described three-phase alternating current electrical network links to each other with the equal natural commutation device circuit in parallel of described input and output, the input of leading rectification circuit; Described input links to each other with the equal natural commutation device circuit in parallel of output, the output of leading rectification circuit.
Preferably, described three-phase alternating current electrical network comprises the first live wire, the second live wire and the 3rd live wire.
Preferably, described filter circuit comprises the first filter inductance, the second filter inductance, the 3rd filter inductance, the first filter capacitor, the second filter capacitor, the 3rd filter capacitor; Wherein, the input of described the first filter inductance links to each other with the first live wire of described three-phase alternating current electrical network, and the output of described the first filter inductance links to each other with an end of described the first filter capacitor, forms first node; The input of described the second filter inductance links to each other with the second live wire of described three-phase alternating current electrical network, and the output of described the second filter inductance links to each other with an end of described the second filter capacitor, forms Section Point; The input of described the 3rd filter inductance links to each other with the 3rd live wire of described three-phase alternating current electrical network, and the output of described the 3rd filter inductance links to each other with an end of described the 3rd filter capacitor, forms the 3rd node; Described the first filter capacitor, the second filter capacitor and the other end of the 3rd filter capacitor link to each other, and form common port.
Preferably, described input comprises the first diode rectifier bridge, the first electrochemical capacitor, the second electrochemical capacitor, the first grading resistor and the second grading resistor with the equal natural commutation device circuit in parallel of output; Wherein, three inputs of described the first diode rectifier bridge respectively with first node, Section Point and the 3rd knot vector, the output cathode of described the first diode rectifier bridge links to each other with the positive pole of the first electrochemical capacitor and an end of the first grading resistor; The output negative pole of described the first diode rectifier bridge links to each other with the negative pole of the second electrochemical capacitor and an end of the second grading resistor; The other end of the positive pole of the other end of the negative pole of described the first electrochemical capacitor, the first grading resistor, the second electrochemical capacitor, the second grading resistor links together, and links to each other with the common port of the first filter capacitor in the filter circuit, the second filter capacitor, the 3rd filter capacitor.
Preferably, the output cathode of described the first diode rectifier bridge connects the positive pole of the first electrochemical capacitor and an end of the first grading resistor, forms the direct current output cathode.
Preferably, the output negative pole of described the first diode rectifier bridge connects the negative pole of the second electrochemical capacitor and an end of the second grading resistor, forms the direct current output negative pole.
Preferably, described leading rectification circuit comprises the first transformer and the second diode rectifier bridge; Wherein, three of described the first primary ac input ends link to each other with first node, Section Point and the 3rd node respectively; Three ac output ends of the first transformer secondary output link to each other with three ac input ends of described the second diode rectifier bridge, the direct current output cathode of described the second diode rectifier bridge and direct current output negative pole respectively with described input and output all the direct current output cathode of natural commutation device circuit in parallel link to each other with the direct current output negative pole.
As mentioned above, described in the utility model pair of electric capacity twelve-pulse rectification circuit has advantages of that circuit structure is simple, control is easy, harmonic current suppresses and power factor correction is effective.
Description of drawings
Fig. 1 is shown as the circuit diagram of of the present utility model pair of electric capacity twelve-pulse rectification circuit.
The element numbers explanation
1 three-phase alternating current electrical network
2 filter circuits
3 inputs and the equal natural commutation device circuit in parallel of output
4 leading rectification circuits
Embodiment
Below by particular specific embodiment execution mode of the present utility model is described, person skilled in the art scholar can understand other advantages of the present utility model and effect easily by the disclosed content of this specification.
See also accompanying drawing.Notice, the appended graphic structure that illustrates of this specification, ratio, size etc., equal contents in order to cooperate specification to disclose only, understand and reading for person skilled in the art scholar, be not to limit the enforceable qualifications of the utility model, therefore the technical essential meaning of tool not, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under the effect that the utility model can produce and the purpose that can reach, all should still drop on the technology contents that the utility model discloses and get in the scope that can contain.Simultaneously, quote in this specification as " on ", D score, " left side ", " right side ", " centre " reach the term of " " etc., also only for ease of understanding of narrating, but not in order to limit the enforceable scope of the utility model, the change of its relativeness or adjustment, under without essence change technology contents, when also being considered as the enforceable category of the utility model.
The present embodiment provides a kind of pair of electric capacity twelve-pulse rectification circuit, as shown in Figure 1, described pair of electric capacity twelve-pulse rectification circuit comprises: three-phase alternating current electrical network 1, filter circuit 2, input and the equal natural commutation device circuit 3 in parallel of output and leading rectification circuit 4.Wherein, three inputs of described filter circuit 2 link to each other with three-phase alternating current electrical network 1, and three outputs of described three-phase alternating current electrical network 1 link to each other with the equal natural commutation device circuit 3 in parallel of described input and output and three inputs of described leading rectification circuit 4.Described filter circuit 2 comprises the first filter capacitor C1, the second filter capacitor C2 and the 3rd filter capacitor C3 and the first filter inductance L1, the second filter inductance L2 and the 3rd filter inductance L3.Described input comprises the first diode rectifier bridge B1, the first electrochemical capacitor E1, the second electrochemical capacitor E2, the first grading resistor R1 and the second grading resistor R2 with the equal natural commutation device circuit 3 in parallel of output.Described leading rectification circuit 4 comprises the first transformer TR1 and the second diode rectifier bridge B2.
Three-phase alternating current electrical network 1 has the first live wire a, the second live wire b and the 3rd live wire c.
The common port D of the first filter capacitor C1, the second filter capacitor C2, the 3rd filter capacitor C3 and described input and output equal natural commutation device circuit 3 DC side the first electrochemical capacitor E1 and the second electrochemical capacitor E2 in parallel in the filter circuit 2, the first grading resistor R1 links to each other with the mid point that the second grading resistor R2 consists of.Described input links to each other with the equal natural commutation device circuit 3 in parallel of output and the output of leading rectification circuit 4, forms output cathode DCP and negative pole DCN, thereby consists of pair electric capacity twelve-pulse rectification circuits.
The input of the first filter inductance L1 links to each other with the first live wire a of described three-phase alternating current electrical network 1 in the filter circuit 2 of described pair of electric capacity twelve-pulse rectification circuit, forms first node A after the output of described the first filter inductance L1 links to each other with the end of the first filter capacitor C1; The input of the second filter inductance L2 links to each other with the second live wire b of described three-phase alternating current electrical network 1, and the output of described the second filter inductance L2 links to each other with the end of the second filter capacitor C2 and forms Section Point B; The input of the 3rd filter inductance L3 links to each other with the 3rd live wire c of described three-phase alternating current electrical network 1, and the output of described the 3rd filter inductance L3 links to each other with the end of the 3rd filter capacitor C3 and forms the 3rd node C; After the other end of the first filter capacitor C1, the second filter capacitor C2 and the 3rd filter capacitor C3 connects, form the first electrochemical capacitor E1 and the second electrochemical capacitor E2 of equal natural commutation device circuit 3 DC side in parallel of common port D and described input and output, the first grading resistor R1 links to each other with the mid point of the second grading resistor R2 formation.
The input of described pair of electric capacity twelve-pulse rectification circuit and output all in the natural commutation device circuit 3 in parallel three inputs of the first diode rectifier bridge B1 be connected respectively first node A, Section Point B and the 3rd node C, the output cathode of described the first diode rectifier bridge B1 connects the positive pole of the first electrochemical capacitor E1 and the end of the first grading resistor R1, forms direct current output cathode DCP; The output negative pole of described the first diode rectifier bridge B1 connects the negative pole of the second electrochemical capacitor E2 and the end of the second grading resistor R2, forms direct current output negative pole DCN.The other end of the positive pole of the other end of the negative pole of described the first electrochemical capacitor E1, the first grading resistor R1, the second electrochemical capacitor E2, the second grading resistor R2 links together, and links to each other with the first filter capacitor C1, the second filter capacitor C2 in the filter circuit 2, the common port D of the 3rd filter capacitor C3.
Three elementary ac input ends of the first transformer TR1 link to each other with the 3rd node C with first node A, Section Point B respectively in the leading rectification circuit 4 of described pair of electric capacity twelve-pulse rectification circuit, three ac output ends of TUR level of described the first transformer link to each other with three ac input ends of the second diode rectifier bridge B2, and two direct current output cathodes of described the second diode rectifier bridge B2 link to each other with negative pole DCN same polarity with the direct current output cathode DCP of described natural commutation circuit 3 respectively with negative pole.
The operation principle of the present embodiment is:
The utility model is introduced principle by phase-shifting commutation principle and triple harmonic current, generation stagger the time rectification and capable of regulating intensity of flow, improve filter circuit rear class current waveform, after filtration after the wave circuit effect, obtain the approximate unit power factor in the net side, realize the harmonic current inhibition and improve net side power factor, can realize the twelve-pulse rectification simultaneously, improve the VD waveform.
Described input is main rectifier with the equal natural commutation device circuit 3 in parallel of output, is used for transmitting main power, on its incoming line, produces position two narrow current waveform placed in the middle.Described leading rectification circuit 3 is less important rectifier, is used for transmitting time power, on its incoming line, produces the leading two narrow current waveform in position.Two groups of two narrow current waveforms that produce are synthetic at node A, B, C place, obtain the higher current waveform of sinusoidal degree after filter circuit 1 filtering through the net side again.The common port D of three filter capacitors and described input and output be the line formation triple harmonic current between the mid point of the DC side electrochemical capacitor of natural commutation device circuit 3 in parallel all, under the acting in conjunction, can further improve the current on line side waveform, reach the purpose that suppresses harmonic current and improve power factor.Be exactly in brief, utilize two groups of rectifiers that phase place is different, produce stagger the time rectification and capable of regulating intensity of flow, after filtration wave circuit 1 effect suppresses harmonic current and improves net side power factor.Therefore the different effects such as rectifier of two groups of phase places also can improve the VD waveform in a kind of six pulsation rectifications.
Adopted three-phase alternating-current supply 380VAC in the present embodiment in the three-phase alternating current electrical network 1, rated output power 5.0KW, unloaded output dc voltage 640V(is owing to the resonance reason), specified output dc voltage 500VDC; The rated current of the first diode rectifier bridge B1 and the second diode rectifier bridge B2 and rated voltage are respectively 35 amperes and 1200 volts; The first filter inductance L1, the second filter inductance L2 and the 3rd filter inductance are respectively 2.5mH; The first filter capacitor C1, the second filter capacitor C2 and the 3rd filter capacitor C3 are that ac capacitor is respectively 2.0 μ F/275V; The first transformer TR1 is power frequency silicon steel transformer, and its specified output AC voltage is 380VAC; The first decomposition voltage E1 and the second decomposition voltage E2 are two decomposition voltages in parallel, the first decomposition voltage E1 and the second decomposition voltage E2680 μ F/450V, equivalence in parallel is 2 * 680 μ F/450V, and the DC side equivalent capacity of described natural commutation circuit 3 is 680 μ F/900V; The first grading resistor R1 and the second grading resistor R2 are power resistor, and resistance is 100K Ω, and power is 10W.
The utility model provides a kind of pair of electric capacity twelve-pulse rectification circuit, and this circuit structure is simple, and control method is with low cost, can obtain more straight direct voltage and the net side power factor that satisfies harmonic current standard.Described pair of electric capacity twelve-pulse rectification circuit can be widely used in the converters that all front stage circuits are three-phase rectifier.
In sum, the utility model has effectively overcome various shortcoming of the prior art and the tool high industrial utilization.
Above-described embodiment is illustrative principle of the present utility model and effect thereof only, but not is used for restriction the utility model.Any person skilled in the art scholar all can be under spirit of the present utility model and category, and above-described embodiment is modified or changed.Therefore, have in the technical field under such as and know that usually the knowledgeable modifies or changes not breaking away from all equivalences of finishing under spirit that the utility model discloses and the technological thought, must be contained by claim of the present utility model.
Claims (7)
1. a two electric capacity twelve-pulse rectification circuit is characterized in that, described pair of electric capacity twelve-pulse rectification circuit comprises: three-phase alternating current electrical network, filter circuit, input and the equal natural commutation device circuit in parallel of output and leading rectification circuit; Wherein, the input of described filter circuit links to each other with the three-phase alternating current electrical network; The output of described three-phase alternating current electrical network links to each other with the equal natural commutation device circuit in parallel of described input and output, the input of leading rectification circuit; Described input links to each other with the equal natural commutation device circuit in parallel of output, the output of leading rectification circuit.
2. according to claim 1 pair of electric capacity twelve-pulse rectification circuit, it is characterized in that: described three-phase alternating current electrical network comprises the first live wire, the second live wire and the 3rd live wire.
3. according to claim 1 pair of electric capacity twelve-pulse rectification circuit, it is characterized in that: described filter circuit comprises the first filter inductance, the second filter inductance, the 3rd filter inductance, the first filter capacitor, the second filter capacitor, the 3rd filter capacitor; Wherein, the input of described the first filter inductance links to each other with the first live wire of described three-phase alternating current electrical network, and the output of described the first filter inductance links to each other with an end of described the first filter capacitor, forms first node; The input of described the second filter inductance links to each other with the second live wire of described three-phase alternating current electrical network, and the output of described the second filter inductance links to each other with an end of described the second filter capacitor, forms Section Point; The input of described the 3rd filter inductance links to each other with the 3rd live wire of described three-phase alternating current electrical network, and the output of described the 3rd filter inductance links to each other with an end of described the 3rd filter capacitor, forms the 3rd node; Described the first filter capacitor, the second filter capacitor and the other end of the 3rd filter capacitor link to each other, and form common port.
4. according to claim 1 pair of electric capacity twelve-pulse rectification circuit is characterized in that: described input and output all natural commutation device circuit in parallel comprise the first diode rectifier bridge, the first electrochemical capacitor, the second electrochemical capacitor, the first grading resistor and the second grading resistor; Wherein, three inputs of described the first diode rectifier bridge respectively with first node, Section Point and the 3rd knot vector, the output cathode of described the first diode rectifier bridge links to each other with the positive pole of the first electrochemical capacitor and an end of the first grading resistor; The output negative pole of described the first diode rectifier bridge links to each other with the negative pole of the second electrochemical capacitor and an end of the second grading resistor; The other end of the positive pole of the other end of the negative pole of described the first electrochemical capacitor, the first grading resistor, the second electrochemical capacitor, the second grading resistor links together, and links to each other with the common port of the first filter capacitor in the filter circuit, the second filter capacitor, the 3rd filter capacitor.
5. according to claim 4 pair of electric capacity twelve-pulse rectification circuit, it is characterized in that: the output cathode of described the first diode rectifier bridge connects the positive pole of the first electrochemical capacitor and an end of the first grading resistor, forms the direct current output cathode.
6. according to claim 4 pair of electric capacity twelve-pulse rectification circuit, it is characterized in that: the output negative pole of described the first diode rectifier bridge connects the negative pole of the second electrochemical capacitor and an end of the second grading resistor, forms the direct current output negative pole.
7. according to claim 1 pair of electric capacity twelve-pulse rectification circuit, it is characterized in that: described leading rectification circuit comprises the first transformer and the second diode rectifier bridge; Wherein, three of described the first primary ac input ends link to each other with first node, Section Point and the 3rd node respectively; Three ac output ends of the first transformer secondary output link to each other with three ac input ends of described the second diode rectifier bridge, the direct current output cathode of described the second diode rectifier bridge and direct current output negative pole respectively with described input and output all the direct current output cathode of natural commutation device circuit in parallel link to each other with the direct current output negative pole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220565621 CN202889228U (en) | 2012-10-31 | 2012-10-31 | Double-capacitor twelve-pulse rectifying circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220565621 CN202889228U (en) | 2012-10-31 | 2012-10-31 | Double-capacitor twelve-pulse rectifying circuit |
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| Publication Number | Publication Date |
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| CN202889228U true CN202889228U (en) | 2013-04-17 |
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| CN 201220565621 Expired - Lifetime CN202889228U (en) | 2012-10-31 | 2012-10-31 | Double-capacitor twelve-pulse rectifying circuit |
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| CN (1) | CN202889228U (en) |
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2012
- 2012-10-31 CN CN 201220565621 patent/CN202889228U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: RUKING EMERSON CLIMATE TECHNOLOGY (SHANGHAI) CO., Free format text: FORMER OWNER: SHANGHAI RUKING ELECTRONIC SCIENCE + TECHNOLOGY CO., LTD. Effective date: 20140805 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140805 Address after: 200433 room 323, No. 1101-163, National Road, Shanghai, Yangpu District Patentee after: RUKING EMERSON CLIMATE TECHNOLOGIES (SHANGHAI) CO.,LTD. Address before: 200433 Shanghai City, Yangpu District National Road No. 335 Building No. 2, 1803, 1805, 1806, 1807. Patentee before: SHANGHAI RUKING ELECTRONICS Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 200433 room 323, No. 1101-163, National Road, Shanghai, Yangpu District Patentee after: Shanghai Rujing Intelligent Control Technology Co.,Ltd. Address before: 200433 room 323, No. 1101-163, National Road, Shanghai, Yangpu District Patentee before: RUKING EMERSON CLIMATE TECHNOLOGIES (SHANGHAI) Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130417 |