CN102291037A - Alternating-current push-pull inversion-controllable rectification step-down circuit - Google Patents
Alternating-current push-pull inversion-controllable rectification step-down circuit Download PDFInfo
- Publication number
- CN102291037A CN102291037A CN2011102069309A CN201110206930A CN102291037A CN 102291037 A CN102291037 A CN 102291037A CN 2011102069309 A CN2011102069309 A CN 2011102069309A CN 201110206930 A CN201110206930 A CN 201110206930A CN 102291037 A CN102291037 A CN 102291037A
- Authority
- CN
- China
- Prior art keywords
- circuit
- inversion
- output
- controlled rectification
- transformer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The invention discloses an alternating-current push-pull inversion-controllable rectification step-down circuit in the technical field of power electronics. The step-down circuit comprises a high-frequency conversion circuit and an impedance conversion circuit, and the output end of the high-frequency conversion circuit is connected with the input end of the impedance conversion circuit; the high-frequency conversion circuit comprises a filter circuit, a push-pull circuit and a transformer which are sequentially cascaded, and the primary of the transformer is provided with a center tap; the impedance conversion circuit is a fully controlled bridge type rectifier circuit, the output end of which is connected in parallel with a filter capacitor, the middle points of the two bridge arms of the bridge are respectively connected with the two alternating-current output ends of the high-frequency transformer, and the output end of the rectifier bridge outputs direct-current voltage. The step-down circuit outputs stable direct-current voltage, generates a unit input power factor at the same time, realizes flexible voltage-regulating capability, obtains linear input impedance, and overcomes the defect of mutual interference between the fluctuation of the power supply and the fluctuation of the load, and in addition, the step-down circuit supports four-quadrant operation, can feed the direct-current voltage back to an alternating-current power grid, sufficiently utilizes load side idle electric energy, and has the advantages of novel design, high universality, simple structure and low cost.
Description
Technical field
What the present invention relates to is a kind of AC-DC converter of electric and electronic technical field, specifically is a kind of AC-DC converter that is used for the energy two-way flow of exchange conversion, promptly exchanges the reduction voltage circuit of recommending inversion-controlled rectification.
Background technology
Along with the development of China's intelligent grid, solar power generation, wind power generation and the small power station's ratio of distributed electricity generation system in whole energy resource structure progressively rise.The distributed power source capacity is little, and it is wide to distribute, and power of alterating and direct current has concurrently, and supply voltage or frequency have bigger fluctuation.Can neatly various distributed power sources be inserted electric power system and volume is little, in light weight, exchange the reduction voltage circuit of recommending inversion-controlled rectification, have a good application prospect.
The electric power electric transformer of energy two-way flow specifically comprises two voltage transformation links, and one is High Level AC Voltage input-low-voltage AC output element, and another is a low-voltage ac voltage input-low-voltage dc voltage output element.
In order to finish High AC voltage input-low-voltage AC output element, can adopt A-A transducer, also can adopt AC-DC-AC 2 stage converter structure, wherein friendship-DC converter part can independently become product, export lower direct voltage, the back level can dispose conventional straight-AC-AC converter again, finally exports low-voltage ac voltage.A-A transducer mainly contains two types: directly A-A transducer and A-A transducer indirectly.Directly A-A transducer comprises matrix converter and frequency converter, and A-A transducer comprises friendship orthogonal converter indirectly.The circuit of the direct A-A transducer of single-phase input is simple, and control is easy, and cost is lower, but its function limitation, pressure regulation and frequency conversion ability, the low pressure ride-through capability is poor, and input power factor is low.If correctly do not handle, the power frequency high voltage AC power will the emergent power factor be 1 situation in addition, and it is multiple that a large amount of harmonic currents can produce, and must be disposed for this reason.The direct A-A transducer of three-phase input multiple functional, performance height, but its circuit complexity, control loaded down with trivial details, the cost height, the low pressure ride-through capability is poor.Indirect ac-dc-ac transform device single-phase, the three-phase input comprises two-layer configuration: prime AC-DC converter and back level DC-AC converter, it is multiple functional, the performance height, the low pressure ride-through capability is strong, but needs to adopt prime power factor correcting device to reduce the side harmonics electric current.
Through the existing retrieval that is fit to the friendship AC-AC converter technology of High AC voltage input-low-voltage alternating-current or low-voltage dc voltage output application scenario is found, " based on the contactless power supply system research of single-phase matrix convertor " (power electronic technology, o. 11th in 2009 43 volumes) and " based on the design realization of the voltage regulator of matrix converter topological structure " (Shanghai Normal University's journal, the function and the poor-performing of single-phase-single-phase A-A transducer of describing 2009 the 1st phases 38 volume), the frequency conversion voltage adjusting ability of output voltage and input impedance present non-linear, are difficult to be generalized to three-phase-single-phase invertor; China Patent No.: 02139030.4, patent name: electric power electric transformer, the topological sum operation principle of the electric power electric transformer of description are all extremely complicated, and it is very high to use difficulty.
In order to finish the output of low-voltage ac voltage input-low-voltage dc voltage, realize impedance conversion simultaneously, can adopt circuit of power factor correction.Traditional active PFC adjuster adopts uncontrollable rectifier bridge scheme, and output voltage frequency is non-adjustable, does not support the energy two-way flow.The limitation of this scheme makes it can't follow the development of technology closely, can not satisfy the requirement of intelligence, will be eliminated.
In sum, directly there is the complicated and low deficiency of input power factor of control in A-A transducer, indirectly A-A transducer needs input power factor to proofread and correct to reduce side harmonics to disturb, all can not be applicable to application scenario, high-voltage alternating input-low-voltage alternating-current or low-voltage direct output ground, traditional uncontrollable rectifier bridge PFC correcting circuit also can't satisfy the requirement that power bi-directional flows.Along with the expansion of application in practice, design a kind of simple in structure, complete function, high input power factor, the A-A transducer of energy two-way flow has become those skilled in the art's the task of top priority.
Summary of the invention
The present invention is directed to the above-mentioned deficiency of prior art, provide a kind of interchange to recommend the reduction voltage circuit of inversion-controlled rectification, achieve the AC-DC conversion, has linear input impedance, solve the low pressure crossing problem, the function that the output dc voltage lifting is adjustable is supported four-quadrant operation, have simple in structurely, control advantage easy and with low cost.
The present invention is achieved by the following technical solutions, the present invention includes: high frequency conversion circuit and impedance inverter circuit, wherein: the output of high frequency conversion circuit links to each other with the input of impedance inverter circuit.
Described high frequency conversion circuit comprises: the filter circuit of cascade, push-pull circuit and transformer successively.
Described filter circuit is the LC filter.
The structure of described push-pull circuit is the contrary semibridge system structure of leading the switch composition of two groups of cascodes, and these two groups of cascodes are reverse against the switching signal of leading switch.The output of push-pull circuit links to each other with the transformer two ends, and the described contrary base stage of leading switch is accepted the pwm pulse control signal.
The structure of described impedance inverter circuit is the full-controlled bridge rectification circuit of output filter capacitor in parallel, and two brachium pontis mid points of bridge connect the output of push-pull circuit respectively, and the output of rectifier bridge is a direct voltage.
The present invention carries out work in the following manner: filter circuit makes the industrial frequency AC input current steadily smooth, make high pressure industrial frequency AC input voltage become the power frequency ac voltage of segmentation by push-pull circuit, middle because push-pull circuit uses, avoided the excitation of transformer saturated.Impedance inverter circuit is rectifier just, import this power-frequency voltage signal, the output galvanic current is pressed, simultaneously the unit's of generation input power factor, be reflected to whole interchange and recommend the input of the reduction voltage circuit of inversion-controlled rectification, present unit input power factor feature.Impedance inverter circuit adopts input current and the two closed-loop controls of output voltage, monocycle to control scheduling algorithm, produce suitable pwm pulse control signal, drive the power switch of rectifier, obtain resistive input impedance and stable DC output voltage, form and exchange the reduction voltage circuit of recommending inversion-controlled rectification, be the DC-AC converter power supply of back level, thereby form the AC-AC converter.
The present invention can avoid the saturated impedance inverter circuit of static exciter can obtain the principle of linear impedance according to push-pull circuit, formulated and recommended the AC-DC converter, can realize pressure regulation ability and the linear input impedance of acquisition reliably flexibly, overcome A-A transducer power supply and the fluctuation of load deficiency of mutual interference mutually, be fit to the various application scenarios of high pressure input-low pressure output translator.The impedance inverter circuit simplicity of design, control is convenient, can realize the energy two-way flow, has important use and is worth.The AC-DC converter of energy two-way flow of the present invention has features such as project organization novelty, highly versatile, has simple in structure, low cost and other advantages simultaneously.
Description of drawings
Fig. 1 is the circuit theory diagrams of the embodiment of the invention 1;
Fig. 2 is the circuit theory diagrams of the embodiment of the invention 2;
Fig. 3 is the circuit theory diagrams of the embodiment of the invention 3.
Embodiment
Below embodiments of the invention are elaborated, present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed execution mode and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1
As shown in Figure 1, present embodiment provides a kind of interchange to recommend the reduction voltage circuit of inversion-controlled rectification, comprising: high frequency conversion circuit and impedance inverter circuit 3, wherein: the output of high frequency conversion circuit links to each other with the input of impedance inverter circuit 3.
Described high frequency conversion circuit comprises: filter circuit L1, the C1 of cascade, push-pull circuit 1 and transformer 2 successively.The output of push-pull circuit 1 links to each other with the input of impedance inverter circuit 3 by transformer 2.
Described transformer is the elementary centre tapped transformer of being with, and former limit and secondary leakage inductance are lower than 10mH.
Described filter circuit is the LC filter.
Described inductance L 1 is the ferrocart core material, high-pressure type, and the sense value is 5mH.
Described capacitor C 1 is an ac capacitor, high-pressure type, 2.0mF/10kV.
Described push-pull circuit is led the half bridge circuit that switch BS1, BS2 form by two cascodes are contrary, and their base stage is accepted the pwm pulse control signal.
Described is 15kV/5A/100 ° of C of SiC power MOSFET against leading switch, the contrary duty ratio of leading the PWM driving pulse of switch of cascode is 50% or adjustable according to the closed-loop control result, 180 ° of stagger angles on the drive signal phase place of BS1 and BS2 wherein, switching frequency 5kHz.
Described impedance inverter circuit 3 comprises: rectification circuit S1, S2, S3, S4 and output electrochemical capacitor E1 in parallel with it, wherein the mid point of two of rectification circuit brachium pontis connects the ac output end of push-pull circuit 1, the output DCP of rectification circuit and DCN output dc voltage respectively by transformer 2.
Described rectification circuit contrary is led the rectifier bridge that switch S 1, S2, S3, S4 are formed by four, and this accepts the pwm pulse control signal against base stage of leading switch.
The described contrary switch S 1, S2, S3, S4 led is 15kV/5A/100 ° of C of SiC power MOSFET, identical against leading switch S 1 with the S4 driving pulse, identical against leading switch S 2 with the S3 driving pulse, the duty ratio of driving pulse is adjustable according to the closed-loop control result, stagger angle is 180 ° on two groups of signal phases, switching frequency 35kHz.
Described electrochemical capacitor E1 is alminium electrolytic condenser 2200mF/450V.
Described transformer T1 is a high-pressure type, voltage-dropping type, and no-load voltage ratio is 15:15:1, adopts a plurality of simplex winding series connection to promote voltage endurance capability.
In the present embodiment, input ac voltage is 6.0kV, and output dc voltage is 380V, and rated output power is 4kW.All components and parts all adopt high accuracy.
As shown in Figure 2, present embodiment relates to the linear AC-DC converting means of a kind of composite type, recommended the reduction voltage circuit of inversion-controlled rectification is made up of the interchange of three groups of same structures, wherein each interchange input of recommending the reduction voltage circuit of inversion-controlled rectification links to each other these three groups output parallel connection and the output dc voltages that exchange the reduction voltage circuit of recommending inversion-controlled rectification respectively at any two-phase of three-phase alternating current.
Present embodiment can be realized bigger power output, has three-phase linear input impedance characteristic simultaneously.
As shown in Figure 3, present embodiment relates to the linear AC-DC converting means of a kind of composite type, recommend the reduction voltage circuit of inversion-controlled rectification by the interchange of three groups of same structures and form, these the three groups input series connection that exchange the reduction voltage circuit of recommending inversion-controlled rectification, output series connection and output dc voltage.
Present embodiment can be realized high voltage input and bigger power output.
The present invention exchanges the reduction voltage circuit recommend inversion-controlled rectification and adopts and a kind ofly lead push-pull circuit that switch forms and elementaryly be with centre tapped transformer by two cascodes are contrary, realization is transformed to the low pressure power-frequency voltage by the high pressure power frequency ac voltage, adopt impedance inverter circuit to realize again by power frequency low-voltage alternating-current-low-voltage direct output, obtain galvanic current and press output, use for back level direct-current-alternating-current converter, has the unit input power factor simultaneously, this unit input power factor can be transmitted to electrical network by the high frequency conversion circuit again, thereby obtain net side unity power factor and the pollution of no harmonic current, support four quadrant running in addition, the load-side direct voltage can be fed back to AC network, make full use of the idle electric energy of load, entire circuit is very simple simultaneously, it is few to detect electric weight and controlled electric weight, design of Controller is also also uncomplicated, has obtained simulation analysis and experiment preliminary identification.And during existing centralized solution common not enough: the circuits cascading complexity, control is complicated, and feasibility is relatively poor; Lack impedance transformer.Can not realize the net side unity power factor under arbitrary load.Input and output mutual interference mutually; Be difficult to constitute the converter of three-phase main-frequency High AC voltage-low-voltage dc voltage; Do not support the energy two-way flow, can not satisfy the demand for development of intelligent grid.
Although content of the present invention has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple modification of the present invention with to substitute all will be conspicuous.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (7)
1. the reduction voltage circuit of inversion-controlled rectification is recommended in an interchange, comprising: high frequency conversion circuit and impedance inverter circuit, and wherein: the output of high frequency conversion circuit links to each other with the input of impedance inverter circuit, it is characterized in that:
Described high frequency conversion circuit comprises: the filter circuit of cascade, push-pull circuit and transformer successively;
The structure of described impedance inverter circuit is the full-control type bridge rectifier of output filter capacitor in parallel, and the mid point of two brachium pontis of bridge connects two ac output ends of transformer, the output output dc voltage of rectifier bridge respectively.
2. the reduction voltage circuit of inversion-controlled rectification is recommended in interchange according to claim 1, it is characterized in that, described filter circuit is the LC filter.
3. the reduction voltage circuit of inversion-controlled rectification is recommended in interchange according to claim 1, it is characterized in that, described push-pull circuit is the contrary semibridge system structures of leading the switch composition of two groups of cascodes, and the contrary base stage of leading switch is accepted the pwm pulse control signal, 180 ° of the drive signal phase phasic differences of two groups of switches.
4. the reduction voltage circuit of inversion-controlled rectification is recommended in interchange according to claim 3, it is characterized in that, the mid point of two brachium pontis of described push-pull circuit links to each other with the transformer input respectively.
5. the reduction voltage circuit of inversion-controlled rectification is recommended in interchange according to claim 1, it is characterized in that, described transformer is the elementary centre tapped transformer of being with.
6. the linear AC-DC converting means of a composite type, it is characterized in that, form by the reduction voltage circuit that inversion-controlled rectification is recommended in three groups of described interchanges of claim 1, wherein: the input that the reduction voltage circuit of inversion-controlled rectification is recommended in each interchange links to each other with any two-phase of three-phase alternating current respectively, these three groups output parallel connection and the output dc voltages that exchange the reduction voltage circuit of recommending inversion-controlled rectification.
7. the linear AC-DC converting means of a composite type, it is characterized in that, form these the three groups input series connection that exchange the reduction voltage circuit of recommending inversion-controlled rectification, output series connection and output dc voltage by the reduction voltage circuit that inversion-controlled rectification is recommended in three groups of described interchanges of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102069309A CN102291037A (en) | 2011-07-22 | 2011-07-22 | Alternating-current push-pull inversion-controllable rectification step-down circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102069309A CN102291037A (en) | 2011-07-22 | 2011-07-22 | Alternating-current push-pull inversion-controllable rectification step-down circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102291037A true CN102291037A (en) | 2011-12-21 |
Family
ID=45337197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102069309A Pending CN102291037A (en) | 2011-07-22 | 2011-07-22 | Alternating-current push-pull inversion-controllable rectification step-down circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102291037A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684471A (en) * | 2012-04-25 | 2012-09-19 | 陈帮云 | Single-stage isolation power factor correction (PFC) power circuit for zero input rectifying element |
| CN106655753A (en) * | 2016-11-09 | 2017-05-10 | 深圳市拓革科技有限公司 | Single-phase bridgeless isolated power factor adjusting circuit |
| CN109104106A (en) * | 2018-08-30 | 2018-12-28 | 中国科学院电工研究所 | Monophase electric power electronic transformer and its control method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1348248A (en) * | 2001-09-10 | 2002-05-08 | 南京航空航天大学 | High-frequency AC/AC converter with AC link |
| CN101180787A (en) * | 2005-05-20 | 2008-05-14 | Sma技术股份公司 | Bi-directional battery power inverter |
| CN101523710A (en) * | 2006-06-06 | 2009-09-02 | 威廉·亚历山大 | Universal power converter |
-
2011
- 2011-07-22 CN CN2011102069309A patent/CN102291037A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1348248A (en) * | 2001-09-10 | 2002-05-08 | 南京航空航天大学 | High-frequency AC/AC converter with AC link |
| CN101180787A (en) * | 2005-05-20 | 2008-05-14 | Sma技术股份公司 | Bi-directional battery power inverter |
| CN101523710A (en) * | 2006-06-06 | 2009-09-02 | 威廉·亚历山大 | Universal power converter |
Non-Patent Citations (4)
| Title |
|---|
| 《电工技术学报》 20011226 陈道炼等 "电压源高频交流环节AC /AC变换器原理研究" 25-27页 1-7 第16卷, 第6期 * |
| 《高电压技术》 20080331 吴振兴等 "单相PWM整流器输入电流波形的改善技术" 603-608页，图1 1-3 第34卷, 第3期 * |
| 吴振兴等: ""单相PWM整流器输入电流波形的改善技术"", 《高电压技术》 * |
| 陈道炼等: ""电压源高频交流环节AC /AC变换器原理研究"", 《电工技术学报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684471A (en) * | 2012-04-25 | 2012-09-19 | 陈帮云 | Single-stage isolation power factor correction (PFC) power circuit for zero input rectifying element |
| CN106655753A (en) * | 2016-11-09 | 2017-05-10 | 深圳市拓革科技有限公司 | Single-phase bridgeless isolated power factor adjusting circuit |
| CN106655753B (en) * | 2016-11-09 | 2019-06-21 | 深圳市拓革科技有限公司 | The single-phase no isolated function of bridge of one kind is because of adjustment circuit |
| CN109104106A (en) * | 2018-08-30 | 2018-12-28 | 中国科学院电工研究所 | Monophase electric power electronic transformer and its control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Twiname et al. | A new resonant bidirectional DC–DC converter topology | |
| CN100514819C (en) | Cutting control AC voltage adjusting circuit and its application | |
| CN102163932A (en) | Linear alternating current-direct current (AC-DC) converter for alternating chopped wave | |
| CN102291035A (en) | Alternating-current push-pull inversion-matrix rectification step-down circuit | |
| CN108988676B (en) | Single-stage isolated bidirectional AC-DC converter | |
| CN110460241A (en) | A kind of modularization tandem type DC converter of High voltage output | |
| CN101976965B (en) | Direct-current tracing control high-power photovoltaic grid-connected inverter | |
| CN102291014A (en) | Alternating-current chopping-full-bridge rectification AC-DC (alternating current-to-direct current) converter | |
| CN102185496A (en) | AC-DC converter with bidirectional energy flow | |
| CN102447396A (en) | Transformer with high set-up ratio, solar inverter and solar battery system | |
| CN104836463A (en) | Mixing transformation system based on three-phase PWM rectification and multi-unit uncontrolled rectification | |
| Gomathi et al. | Active Bridges based Bidirectional DC-DC converter for Solar PV application | |
| Haque et al. | Three-port converters for energy conversion of pv-bes integrated systems—a review | |
| CN103078525A (en) | Alternative-current direct-current (AC-DC) converter based on exchange link technology | |
| CN102291037A (en) | Alternating-current push-pull inversion-controllable rectification step-down circuit | |
| CN109728581A (en) | A kind of composite energy router and control method | |
| CN101521394B (en) | Online uninterrupted power supply | |
| CN102291036B (en) | Alternating-current push-pull conversion-full-bridge rectification step-down circuit | |
| CN102291020A (en) | Alternating-current push-pull conversion-single-diode rectification AC-DC (alternating current-to-direct current) converter | |
| CN217545902U (en) | High-power phase-shifting chopper power supply for hydrogen production by water electrolysis | |
| CN102324860B (en) | Direct current chopping linear alternating current-direct current (AC-DC) converter | |
| CN108683353A (en) | Substation's energy-saving multifunctional integration charge and discharge device and control method | |
| Forouzesh et al. | A Novel Soft-Switched Three-Phase Three-Wire Isolated AC-DC Converter With Power Factor Correction | |
| Megahed | Increasing efficiency and power factor for power supplies using parallel Flyback converter | |
| Sayed et al. | Steady-state analysis of soft-switched three-phase grid-tie DC-AC converter isolated by high-frequency transformer for high efficiency and low THD |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20111221 |