CN102684513B - Uninterrupted power supply and rectification circuit thereof - Google Patents
Uninterrupted power supply and rectification circuit thereof Download PDFInfo
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- CN102684513B CN102684513B CN201110070659.0A CN201110070659A CN102684513B CN 102684513 B CN102684513 B CN 102684513B CN 201110070659 A CN201110070659 A CN 201110070659A CN 102684513 B CN102684513 B CN 102684513B
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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
- 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
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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
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- Y02P80/00—Climate change mitigation technologies for sector-wide applications
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Abstract
The present invention relates to a kind of uninterrupted power supply and rectification circuit thereof, this rectification circuit comprises: its input connects the silicon controlled rectifier of power supply; Its former limit connects the transformer of the input of power supply and silicon controlled rectifier; Hf rectifier, the secondary of its input connection transformer, and its output is connected in series the output of silicon controlled rectifier to export described direct voltage by the series connection of silicon controlled rectifier and hf rectifier; And commutation controller, it is according to the harmonic current of the total input of Current calculation of total input of detected inflow silicon controlled rectifier and transformer, or flow into the harmonic current of silicon controlled rectifier according to the Current calculation of the input of detected inflow silicon controlled rectifier, and control the hf rectifier generation harmonic current contrary with calculated harmonic current according to calculated harmonic current.Implement technical scheme of the present invention, the harmonic current even eliminating total input can be reduced, improve power factor value, thus make the electric current of total input be near sinusoidal ripple electric current.
Description
Technical field
The present invention relates to power electronic technology, more particularly, relate to a kind of uninterrupted power supply (UPS) and rectification circuit thereof.
Background technology
Along with people are to the increase day by day of data protection demand, UPS (uninterruptiblePowerSupply, uninterrupted power supply) obtains and uses more and more widely.At present, high power UPS often adopts silicon controlled rectifier SCR (SiliconControlledRectifier), this silicon controlled rectifier is by the input voltage of change by the voltage after the phase shift slicing adjustment of full bridge controllable silicon rectifier required for voltage stabilizing to storage battery, and accumulators provides the charging voltage of needs.Silicon controlled rectifier is simple due to it, and reliably, cost is low, obtains and applies widely for a long time.
Fig. 1 is the circuit diagram of a kind of UPS of prior art, and this UPS comprises three-phase alternating current input source Source, switch CB1, inductance L 1, full bridge controllable silicon rectifier SCR1, electric capacity C1, switch CB2, storage battery Battery, inverter INV1, inductance L out, ac filter electric capacity FilterCap2.The alternating voltage that three-phase voltage source Source exports is sent to inductance L 1 by switch CB1, by voltage stabilizing after full bridge controllable silicon rectifier SCR1 to the direct voltage of wishing, electric capacity C1 is flat wave capacitor, and the two ends of storage battery Battery are connected on DC bus by CB2 switch.Direct voltage inversion is gone out alternating voltage by inverter INV1 again, and this alternating voltage, by three pole reactor Lout and three-phase alternating current filter capacitor FilterCap2 filtering, obtains alternating voltage at output.
But, because SCR manages self, make the harmonic current of inflow full bridge controllable silicon rectifier large, power factor is low, there is serious interference to electrical network and other equipment, the harmonic current of high frequency not only causes the misoperation of the equipment be connected with this UPS, also causes harmonic loss.
In the today requiring environmental protection, need to mix other passive or active filter to the input of silicon controlled rectifier and carry out harmonic reduction electric current, so not only volume is large, Heavy Weight, and adds cost.
The method of another kind of harmonic reduction electric current uses IGBT (InsulatedGateBipolarTransistor, insulated gate bipolar transistor) rectifier replaces silicon controlled rectifier, correct to realize PF (PowerFactor, power factor).But make cost increase like this, efficiency reduces.
Summary of the invention
The technical problem to be solved in the present invention is, for the defect that harmonic current is large, input power factor is low of the above-mentioned inflow silicon controlled rectifier of prior art, provide a kind of rectification circuit, the harmonic current exchanging input source can be reduced, improve input power factor, and reduce costs.
According to an aspect of the present invention, provide the rectification circuit that a kind of alternating voltage for being exported by power supply is converted to direct voltage, this rectification circuit comprises: its input connects the silicon controlled rectifier of described power supply; Its former limit connects the transformer of the input of described power supply and described silicon controlled rectifier; Hf rectifier, its input connects the secondary of described transformer, and its output is connected in series the output of described silicon controlled rectifier to export described direct voltage by the series connection of described silicon controlled rectifier and described hf rectifier; And commutation controller, it calculates according to the electric current sum on the electric current of the input of detected inflow silicon controlled rectifier and the former limit of inflow transformer the harmonic current flowing into rectification circuit, or flow into the harmonic current of silicon controlled rectifier according to the Current calculation of the input of detected inflow silicon controlled rectifier, and control the hf rectifier generation harmonic current contrary with calculated harmonic current according to calculated harmonic current.
The present invention also constructs a kind of UPS, comprises according to rectification circuit of the present invention, storage battery and inverter, and the direct voltage that described rectification circuit exports is charge in batteries, and the direct voltage inversion that rectification circuit exports by described inverter is alternating current.
Implement technical scheme of the present invention, commutation controller is according to the harmonic current of the total input of Current calculation of total input of detected inflow rectification circuit, or the harmonic current of silicon controlled rectifier is flowed into according to the Current calculation of the input flowing into silicon controlled rectifier, and control the hf rectifier generation harmonic current contrary with calculated harmonic current according to calculated harmonic current, be zero after the harmonic current produced is added with calculated harmonic current, so just reduce the harmonic current even eliminating total input, improve power factor value, thus make the electric current of total input be sine-wave current haply.And due to by being connected in series hf rectifier and silicon controlled rectifier carrys out output dc voltage, therefore hf rectifier is not full power conversion, makes its volume and cost all lower.
In addition, by the idle component making hf rectifier compensate input, the electric current of total input can be made to be essentially sine-wave current.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the circuit diagram of a kind of UPS of prior art;
Fig. 2 is the logic diagram of UPS embodiment one of the present invention;
Fig. 3 is the logic diagram of UPS embodiment two of the present invention;
Fig. 4 is the circuit diagram of UPS embodiment three of the present invention;
Fig. 5 is the logic diagram of commutation controller according to an embodiment of the invention.
Embodiment
As shown in Figure 2, in the logic diagram of UPS embodiment one of the present invention, this UPS comprises rectification circuit, storage battery and inverter, when the power supply of such as three-phase alternating current input source is normal, the ac voltage rectifier that power supply exports by rectification circuit is direct voltage, and this direct voltage is charge in batteries, simultaneously, the direct voltage inversion that rectification circuit exports by inverter is alternating current, powers to give the load (not shown) of this UPS.Stress the rectification circuit of this UPS below.
In the rectification circuit of this UPS, include: silicon controlled rectifier, transformer, hf rectifier and commutation controller, the output of power supply connects the input of silicon controlled rectifier and the former limit of transformer respectively, the secondary of transformer connects the input of described hf rectifier, silicon controlled rectifier and the rear output dc voltage of hf rectifier series connection.Commutation controller connects power supply and hf rectifier, this commutation controller detects the electric current sum (electric current also referred to as total input) flowing into the input of silicon controlled rectifier and the former limit of transformer, according to the harmonic current of the total input of Current calculation of detected total input, such as, harmonic current is calculated by Fourier transform.About the computational methods of harmonic current, those skilled in the art can select according to actual needs, and its details repeats no more.After calculating harmonic current, control hf rectifier according to calculated harmonic current and produce the harmonic current contrary with calculated harmonic current, be specially: this commutation controller obtains control signal after the harmonic current calculated is negated, the break-make of the switching tube of hf rectifier is controlled by the driving pulse exported after the modulation of this control signal, hf rectifier is made to produce the harmonic current contrary with calculated harmonic current, like this, just reduce the harmonic current even eliminating total input, improve power factor value, thus make the electric current of total input be near sinusoidal ripple electric current.
In addition, the issuable harmonic current of transformer is significantly less than the harmonic current that silicon controlled rectifier produces under normal circumstances.Therefore, this commutation controller only can detect the electric current of the input flowing into silicon controlled rectifier, flow into the harmonic current of silicon controlled rectifier according to detected Current calculation, and control the hf rectifier generation harmonic current contrary with calculated harmonic current according to calculated harmonic current.
In the present embodiment, hf rectifier is connected in parallel on the input of silicon controlled rectifier, by the harmonic current compensation functional realiey of hf rectifier, the PF of total input corrects, make the feature low according to the simple and reliable cost of the existing silicon controlled rectifier of the rectification circuit of the present embodiment, reduce again the harmonic current even eliminating total input, improve power factor value.
Such as, and due to by being connected in series hf rectifier and silicon controlled rectifier carrys out output dc voltage, therefore hf rectifier is not full power conversion, usually only has the rated power of 20%, makes its volume and cost all lower.
It should be noted that the silicon controlled rectifier mentioned by the application, hf rectifier, transformer are three-phase when power supply is the interchange input source of three-phase.
Preferably, silicon controlled rectifier and hf rectifier are respectively full bridge controllable silicon rectifier and full-bridge high-frequency rectifier.Full-bridge high-frequency rectifier can adopt full-bridge IGBT rectifier or full-bridge MOS rectifier, and full-bridge IGBT rectifier or full-bridge MOS rectifier are controls device at a high speed entirely.
Preferably, transformer is step-down transformer, and like this, transformer not only serves buffer action, makes the voltage stress of hf rectifier greatly reduce simultaneously, and therefore, hf rectifier can select low withstand voltage, low-loss, speed is high, price is low device.When the secondary voltage of transformer is enough low, also correspondingly reduce conduction voltage drop, the full-bridge MOS rectifier that hf rectifier can select metal-oxide-semiconductor to build, in addition, also can select reduced size and other device compared with light weight, as inductance, electric capacity etc.
In volume figure of the UPS embodiment two of the present invention shown in Fig. 3, this UPS comprises rectification circuit, storage battery and inverter, when the power supply of such as three-phase alternating current input source is normal, the alternating voltage that power supply exports is converted to direct voltage by rectification circuit, this direct voltage is charge in batteries, and meanwhile, the direct voltage inversion that rectification circuit exports by inverter is alternating current, power to the load (not shown) of this UPS, stress the rectification circuit of this UPS below.
In the rectification circuit of this UPS, include: silicon controlled rectifier, transformer, hf rectifier and commutation controller, the output of power supply connects the input of silicon controlled rectifier and the former limit of transformer respectively, the secondary of transformer connects the input of described hf rectifier, silicon controlled rectifier and the rear output dc voltage of hf rectifier series connection.Commutation controller connects power supply, silicon controlled rectifier and hf rectifier.Compare the UPS in embodiment one, the UPS difference of the present embodiment is: commutation controller, except realizing except harmonic current compensation by controlling hf rectifier, also carrys out stable DC output voltage Udc by the output voltage of adjustment silicon controlled rectifier.In the present embodiment, the output voltage of hf rectifier is predetermined direct voltage, the direct voltage Udc that this commutation controller exports after detecting silicon controlled rectifier and hf rectifier series connection, and according to the output voltage that detected direct voltage Udc regulates silicon controlled rectifier, make direct voltage Udc be desired voltage values.Specifically can be: this commutation controller sends driving pulse according to detected direct voltage Udc, to control the break-make of the SCR pipe of silicon controlled rectifier, make direct voltage Udc be desired voltage values.Such as, this rectifier controller comprises current/voltage dual-loop control circuit, it produces control signal according to the input current of detected direct voltage Udc and silicon controlled rectifier, then utilize this control signal to carry out pulse signals to modulate, the pulse duration of such as modulated pulse signal, to obtain driving pulse.Be not limited to content disclosed herein, those skilled in the art can select other to generate the method for driving pulse according to actual needs.
In another embodiment, commutation controller, except regulating the output voltage of silicon controlled rectifier, also carrys out stable DC output voltage Udc by the output voltage of adjustment hf rectifier.Particularly, the output voltage Udc1 of the direct voltage Udc that this commutation controller exports after detecting silicon controlled rectifier and hf rectifier series connection and silicon controlled rectifier, and control silicon controlled rectifier and hf rectifier according to detected voltage U dc and Udc1, the direct voltage Udc exported after making series connection is desired voltage values, specifically can be: this commutation controller sends two groups of driving pulses according to detected voltage U dc and Udc1, wherein, first group of driving pulse controls the break-make of the SCR pipe of silicon controlled rectifier, silicon controlled rectifier is made to export the first direct voltage, second group of driving pulse controls the break-make of the switching tube (such as IGBT pipe) of hf rectifier, hf rectifier is made to export the second direct voltage, due to silicon controlled rectifier and hf rectifier series connection, so this first direct voltage and the second direct voltage are direct voltage Udc after being added, and this direct voltage Udc can reach desired voltage values.Under normal circumstances, the SCR pipe of silicon controlled rectifier is full conducting, and make the power factor of input higher, the harmonic current of total input is less.
In this embodiment, by voltage-regulation function and the harmonic wave electric current compensation function of hf rectifier, the PF correction of total input and the quick adjustment of DC voltage stability can be realized, thus improve the performance of rectification circuit, such as, improve system response time.
Fig. 4 is the circuit diagram of UPS embodiment three of the present invention, in this UPS, the three-phase alternating current that three-phase alternating current input source Source exports is divided into two-way after switch CB1, one tunnel is converted to direct voltage Udc1 successively after the rectification of inductance L 1 filtering, full bridge controllable silicon rectifier SCR1, the direct voltage Udc1 filtering that electric capacity C1 exports for full bridge controllable silicon rectifier SCR1; Another road isolates through transformer T1 and step-down, ac filter electric capacity FilterCap1 filtering, inductance L 2 filtering, output dc voltage Udc2, electric capacity C2 are the direct voltage Udc2 filtering that full-bridge IGBT rectifier IGBT1 exports after full-bridge IGBT rectifier IGBT1 rectification.Because full bridge controllable silicon rectifier SCR1 and full-bridge IGBT rectifier IGBT1 connects, so direct voltage Udc1 and Udc2 is the direct voltage Udc that this rectification circuit always exports after being added, i.e. Udc=Udc1+Udc2.The direct voltage Udc exported provides charging voltage through switch CB2 accumulators Battery, and preferably, direct voltage Udc carries out equal floating charge to storage battery Battery, and namely direct voltage Udc accumulators Battery provides equal float charge voltage.Meanwhile, exported direct voltage Udc inversion is gone out alternating voltage by inverter INV1, and the 3rd inductance L out and ac filter electric capacity FilterCap2 is exported alternating voltage filtering.
Commutation controller U1 detects direct voltage Udc and Udc1, send the break-make that two group of 6 road driving pulse Drver1, Driver2 control the SCR pipe in silicon controlled rectifier SCR1 and the IGBT in IGBT rectifier IGBT1 respectively as calculated afterwards, particularly, driving pulse Driver1 drives full bridge controllable silicon rectifier SCR1 to make its output dc voltage Udc1, and driving pulse Driver2 drives full-bridge IGBT rectifier IGBT1 to make its output dc voltage Udc2.SCR pipe is basic is under normal circumstances full conducting, make the power factor (PF) of total input higher, the harmonic current of total input is less, commutation controller U1 major control driving pulse Driver2, regulate the output dc voltage Udc2 of full-bridge IGBT rectifier, make direct voltage Udc1 and direct voltage Udc2's and be desired voltage values.Owing to adopting jointly controlling of full bridge controllable silicon rectifier SCR1 and full-bridge IGBT rectifier IGBT1, control can be made simply efficient, full bridge controllable silicon rectifier SCR1 adopts and regulates at a slow speed, keep total direct voltage Udc exported roughly stable, simultaneously, adopt full-bridge IGBT rectifier IGBT1 to realize quick adjustment, thus realize direct voltage Udc quickly and efficiently and reach desired voltage values.
Meanwhile, full-bridge IGBT rectifier IGBT1 is also equivalent to a harmonic filter.Commutation controller U1 is by detecting the electric current of the electric current of total input or the input of silicon controlled rectifier SCR1, calculate the harmonic current of the input of total input or silicon controlled rectifier SCR1, then control full-bridge IGBT rectifier IGBT1 and send contrary harmonic current, after the harmonic current of the input of this harmonic current and total input or silicon controlled rectifier SCR1 is added, just obtain near sinusoidal ripple electric current, thus obtain higher power factor (PF) value and less harmonic current.
In addition, if the output voltage of three-phase alternating current input source is higher, the driving pulse Driver1 that commutation controller exports passes through phase shifting control, direct voltage Udc1 is made to be controlled in a lower value, now, the harmonic current of total input is comparatively large, still compensates by full-bridge IGBT rectifier IGBT1 the harmonic wave that full bridge controllable silicon rectifier produces, and regulates the size of direct voltage Udc2.
Preferably, when adopting inductance L 2 to carry out filtering in the above-described embodiments, the mode also can connected with the inductance that multiple filtering parameter is less realizes filtering, the plurality of inductance is connected between the secondary of transformer and the input of full-bridge high-frequency rectifier by the mode of hot plug, the reliability of system can be improved like this, make the cost of the production of UPS and maintenance lower.
Similarly, when adopting ac filter electric capacity FilterCap2 to carry out filtering in the above-described embodiments, also the mode of the ac filter Capacitance parallel connection that multiple filtering parameter is less can be selected to realize filtering, the plurality of ac filter electric capacity is connected to the secondary of transformer by the mode of hot plug, to improve the reliability of system, make the cost of the production of UPS and maintenance lower.
Fig. 5 is the logic diagram of commutation controller according to an embodiment of the invention.As shown in Figure 5, this commutation controller comprises analog to digital conversion circuit, silicon controlled rectifier Drive and Control Circuit (first control circuit), IGBT Drive and Control Circuit (second control circuit) and the first and second pulse-modulated signals generation circuit.The operation principle of commutation controller is described below in conjunction with Fig. 4.
This commutation controller detects the AC input voltage of rectification circuit and the output voltage Udc1 of silicon controlled rectifier (SCR1 in Fig. 4) and the electric current of its input, the analog signal detected carries out analog-to-digital conversion through analog to digital conversion circuit, is then sent to silicon controlled rectifier Drive and Control Circuit.SCR Drive and Control Circuit such as comprises Double closed-loop of voltage and current circuit, wherein the value of digitized output voltage Udc1 and setting carries out PID (ProportionIntegralDifferential, proportion integration differentiation) regulate, the signal obtained carries out PID adjustment as the given input of electric current loop and the electric current of digitized silicon controlled rectifier input, and the signal then obtained and digitized AC input voltage carry out synchronous with the control signal (the first control signal) generated for regulation output voltage U dc1.The control signal generated is fed to the first pulse-modulated signal and produces circuit.First pulse-modulated signal produces circuit and modulates by utilizing this control signal pulse signals, and such as pulse width modulation, exports the SCR driving pulse Driver1 for driving silicon controlled rectifier.
In addition, commutation controller also detects the output voltage Udc2 of IGBT rectifier (IGBT1 in Fig. 4) and the electric current of its input, the analog signal detected carries out analog-to-digital conversion through analog to digital conversion circuit, is then fed to IGBT Drive and Control Circuit with above-mentioned digitized AC input voltage together with the electric current of digitized silicon controlled rectifier input.IGBT Drive and Control Circuit is made up of two parts: harmonic controling signal generation unit, its with digitized AC input voltage for reference, calculate the harmonic current flowing into silicon controlled rectifier according to the galvanometer of digitized silicon controlled rectifier input, export as the second control signal for harmonic current compensation after negating; With voltage control signal generation unit, it is similar to silicon controlled rectifier Drive and Control Circuit, such as can comprise IGBT Double closed-loop of voltage and current circuit, generate according to digitized output voltage Udc2 and digitized IGBT rectifier input electric current the 3rd control signal being used for regulation output voltage U dc2.By the phase place making the input current of IGBT rectifier follow the tracks of AC input voltage, can the input power factor of control IGBT rectifier.By second and the 3rd control signal be sent to second pulse-modulated signal produce circuit, second pulse-modulated signal produces circuit and modulates by utilizing these two control signal pulse signals, such as pulse width modulation, exports the IGBT driving pulse Driver2 for driving IGBT rectifier.
In one embodiment, harmonic controling signal generation unit can also calculate the idle component of the fundametal compoment of this electric current according to the galvanometer of digitized silicon controlled rectifier input, then joined in the second control signal, with compensating power.
Each embodiment described above relates to uninterrupted power supply.It will be appreciated by those skilled in the art that rectification circuit according to the present invention is not limited to the rectification circuit adopted in UPS, it can be applied to the fields such as motor frequency change speed regulator, mains lighting supply, Switching Power Supply.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within right of the present invention.
Claims (14)
1. the alternating voltage for being exported by power supply is converted to a rectification circuit for direct voltage, and this rectification circuit comprises:
Its input connects the silicon controlled rectifier of described power supply;
Its former limit connects the transformer of the input of described power supply and described silicon controlled rectifier;
Hf rectifier, its input connects the secondary of described transformer, and its output is connected in series the output of described silicon controlled rectifier to export described direct voltage by the series connection of described silicon controlled rectifier and described hf rectifier; With
Commutation controller, it calculates according to the electric current sum on the electric current of the input of detected inflow silicon controlled rectifier and the former limit of inflow transformer the harmonic current flowing into described rectification circuit, or flow into the harmonic current of described silicon controlled rectifier according to the Current calculation of the input of detected inflow silicon controlled rectifier, and control the hf rectifier generation harmonic current contrary with calculated harmonic current according to calculated harmonic current.
2. rectification circuit according to claim 1, wherein said commutation controller detects described direct voltage, and according to detected DC voltage control silicon controlled rectifier, the direct voltage exported after making described silicon controlled rectifier and the series connection of described hf rectifier is desired voltage values.
3. rectification circuit according to claim 2, wherein said commutation controller also detects the output voltage of described silicon controlled rectifier, and according to the output voltage control of detected direct voltage and described silicon controlled rectifier silicon controlled rectifier and described hf rectifier, the direct voltage exported after making described silicon controlled rectifier and the series connection of described hf rectifier is desired voltage values.
4. rectification circuit according to claim 3, wherein said commutation controller detects the electric current of the input flowing into silicon controlled rectifier and flows into the electric current of input of silicon controlled rectifier and the electric current sum on the former limit of inflow transformer, and described commutation controller comprises:
First control circuit, it produces the first control signal for regulating this output voltage according to the output voltage of detected silicon controlled rectifier and the electric current of the input flowing into silicon controlled rectifier;
First pulse-modulated signal produces circuit, and it generates the first drive singal for driving silicon controlled rectifier according to the first control signal;
Second control circuit, it produces the second control signal for harmonic current compensation according to the electric current of the input of detected inflow silicon controlled rectifier, and according to the output voltage of detected direct voltage, silicon controlled rectifier, the electric current flowing into the input of silicon controlled rectifier and the inflow electric current of input of silicon controlled rectifier and the electric current sum on the former limit of inflow transformer, produce the 3rd control signal of the output voltage for regulating hf rectifier; And
Second pulse-modulated signal produces circuit, and it is according to second and second drive singal of the 3rd control signal generation for driving hf rectifier.
5., according to the rectification circuit one of claim 1-4 Suo Shu, wherein said hf rectifier is full-bridge insulated gate bipolar transistor IGBT rectifier or full-bridge metal oxide semiconductor transistor MOS rectifier.
6., according to the rectification circuit one of claim 1-4 Suo Shu, wherein said transformer is step-down transformer.
7. according to the rectification circuit one of claim 1-4 Suo Shu, wherein said rectification circuit also comprises inductance, and described inductance is connected between the secondary of transformer and the input of hf rectifier.
8. rectification circuit according to claim 7, wherein said inductance is multiple inductance, and described multiple inductance is connected in series, and is connected between the secondary of transformer and the input of hf rectifier by the mode of hot plug.
9., according to the rectification circuit one of claim 1-4 Suo Shu, wherein said rectification circuit also comprises the ac filter electric capacity of the secondary being connected to described transformer.
10. rectification circuit according to claim 9, wherein said ac filter electric capacity is multiple ac filter electric capacity, and described multiple ac filter Capacitance parallel connection connects, and is connected to the secondary of described transformer by the mode of hot plug.
11. according to the rectification circuit one of claim 1-4 Suo Shu, wherein said rectification circuit also comprises the first electric capacity and the second electric capacity, described first electric capacity is connected between two outputs of silicon controlled rectifier, and described second electric capacity is connected between two outputs of hf rectifier.
12. 1 kinds of uninterrupted power supplys, comprise according to the rectification circuit one of claim 1-11 Suo Shu, storage battery and inverter, the direct voltage that described rectification circuit exports is charge in batteries, and the direct voltage inversion that rectification circuit exports by described inverter is alternating current.
13. uninterrupted power supplys according to claim 12, wherein, described direct voltage carries out equal floating charge to described storage battery.
14. uninterrupted power supplys according to claim 12, wherein, described commutation controller reduces the direct voltage of silicon controlled rectifier output by phase shifting control.
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| CN104202886B (en) * | 2014-09-19 | 2016-07-27 | 英飞特电子（杭州）股份有限公司 | A kind of controllable silicon maintains current compensation circuit |
| CN104377947B (en) * | 2014-12-11 | 2017-03-22 | 北京乐普四方方圆科技股份有限公司 | Frequency converter harmonic wave elimination method and frequency converter harmonic wave elimination device |
| CN106452067B (en) * | 2016-10-08 | 2019-03-15 | 中国科学院光电研究院 | A kind of balloon borne supply convertor of captive balloon |
| CN111756268A (en) * | 2019-03-27 | 2020-10-09 | 大连新大路电气传动技术有限责任公司 | High-capacity reversible direct-current power supply with rapidly-jumping output voltage |
| CN114559851B (en) * | 2022-03-08 | 2023-07-07 | 深圳易能时代科技有限公司 | Charging method and system for improving current density |
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| Title |
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| 一种新的三相补偿型UPS;戴珂等;《通信电源技术》;20010630(第2期);第13-16页 * |
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| Publication number | Publication date |
|---|---|
| CN102684513A (en) | 2012-09-19 |
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