CN102201750A - Power supply system - Google Patents
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- CN102201750A CN102201750A CN2010101427345A CN201010142734A CN102201750A CN 102201750 A CN102201750 A CN 102201750A CN 2010101427345 A CN2010101427345 A CN 2010101427345A CN 201010142734 A CN201010142734 A CN 201010142734A CN 102201750 A CN102201750 A CN 102201750A
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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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Abstract
The invention relates to a power supply system, which. The power supply system comprises a filter, a switch matrix, a resonant network and a rectifier, wherein the filter is connected with an input multi-phase alternating-current power supply; a switch matrix is connected with the multi-phase alternating-current power supply input filtered by using the filter, comprises a plurality of bilateral switch components and used for performing high-frequency processing on the multi-phase alternating current input to finally realize DC (Direct Current) voltage output; the resonant network is connected with the switch matrix and is used for realizing resonance and controlling output current to be sinusoidal current; and the rectifier is connected with the resonant network and is used for rectifying and filtering the sinusoidal current output by the resonant network. Due to the adoption of the technical scheme of the invention, at least two phases of AC (Alternating Current) power supply inputs are converted into direct current; zero-voltage switch-on/off can be realized by using the switch matrix, and zero-current switch-on/off can be realized by using a synchronous rectifying switch in the rectifier; and the efficiency is increased and the consumption of the switching process is reduced greatly.
Description
Technical field
The present invention relates to field of power supplies, more particularly, relate to a kind of power-supply system.
Background technology
Generally, use the communication power supply module that alternating voltage is converted to direct voltage and give communication apparatus and powered battery.The modern communication power supply mostly is switching mode power power-supply (switched mode powersupply greatly, be called for short SMPS), adopt pulse-width modulation, control output voltage, output current and input current, generally speaking, the topological structure of Switching Power Supply comprises following part:
1) input filter: the input current that satisfies EMI, harmonic current requirement is provided.
2) input current shaping circuit: adopt boost circuit of power factor correction (Power FactorCorrection is called for short PFC) mostly, ac input voltage is converted to the high pressure dc voltage, controlling input current simultaneously is sinusoidal current.
3) DCDC change-over circuit: the high pressure dc voltage by transformer isolation and output rectification, is converted to low voltage DC voltage.
4) output filter:, reduce output voltage ripple and satisfy output EMI to having the low voltage DC voltage filter of high frequency ripple.
Fig. 1 shows the single-phase switch power supply schematic diagram that uses in the prior art.Single phase alternating current (A.C.) inputs to filter, becomes high voltage direct current (HV DC) again after bridge rectifier and PFC processing, again output DC direct current behind DC-DC processing and diode rectifier and filter.But this traditional switch power efficiency (power output is divided by the percentage of input power) only reaches about 92%.
Fig. 2 shows another single-phase switch power supply schematic diagram that uses in the prior art.Traditional bridge rectifier in the PFC alternate figures 1 of the no bridge of its topological structure use, output synchronous rectification substitutes diode rectification.Single phase alternating current (A.C.) inputs to filter, becomes high voltage direct current (HV DC) after PFC handles, again output DC direct current after DC-DC processing and MOSFET rectification and filtering.
For topological structure shown in Figure 2, suppose that the switch periods of PFC and DC-DC is identical, the power electric current will flow through the PFC diode once, the PFC switching tube once, the DC-DC switching tube once, and the PFC switching tube is a hard switching, having only the DC-DC switching tube is soft switch, and each switch once.According to the patent application that is PCT/NO2008/00303 of disclosed number of patent application as can be known, this topological switch power efficiency is current generally acknowledged the highlyest only can reach 96.5%.
For three-phase voltage input power-supply system, the various documents from open issue probably can be divided into following a few class:
1), three single-phase modules constitute three-phase input power-supply system, need 4 lines realize the input of 3 cross streams, therefore need additional designs to go out other single line, that is to say, need to use more device.According to the identical design principle of Fig. 2 and select for use with the proportional device capacity of power, its peak efficiency will be smaller or equal to 96.5%.
2), based on the three-phase of Vienna PFC input power-supply system, as shown in Figure 3, after Vienna PFC is converted to high pressure DC with AC, adopt identical DC-DC topology of Fig. 2 or three-level DC-DC topology again.Vienna PFC will be converted to the 800V square wave through storage capacitor and three-level LLC with the 800V high pressure after the three-phase AC of filtering input is converted to high pressure DC (800V), send into filter by inductance and resonant capacitance again and carry out filtering, for example negative 48V direct current of output.Wherein the switching device in the dotted ellipse frame is realized by two metal-oxide-semiconductors.
As can be seen from Figure 3, decompose single-phase, the number of switches that its power electric current flows through power diode and a MOSFET and a switch periods power tube is identical with Fig. 2, and the switching tube that also has only DC-DC could be realized zero voltage switch (Zero Voltage Switch, be called for short ZVS), so according to the identical design principle of Fig. 2 with select for use with the proportional power device of power, its efficient will be suitable with Fig. 2.
Three level 800V bus high pressure of this topological structure make the selection of device that suitable difficulty be arranged, and need late-class circuit to possess high withstand voltage properties, have also caused the conduction voltage drop of device and conducting resistance excessive, and device cost is raise, and efficient reduces.
3), three-phase single-level phase-shifting full-bridge topology, as shown in Figure 4.
Sending into 6 switching devices through the three-phase AC of filtering input (for example adopts 12 metal-oxide-semiconductors to realize here, each switching device comprises 2 metal-oxide-semiconductors) carry out forming voltage square wave, electric current square wave after the high frequency processing, send into transformer again and filter is handled, output DC direct current.With respect to topology shown in Figure 3, need not to use 6 diodes, storage capacitor, resonant capacitance, cost is relatively low.This topology heavy duty can realize the ZVS of switching tube, but under balance duty-cycle loss condition, the underload switch pipe can not be realized ZVS, it realizes the similar phase-shifting full-bridge topology of ZVS principle, but need output differential mode filter inductance because its output filtering contrast this paper invents, and output rectification MOSFET can not realize Zero Current Switch (Zero Current Switch is called for short ZCS), and can not select the MOSFET of twice output voltage grade for use, need the more MOSFET pipe of voltage levels.
The detailed content of above-mentioned three-phase voltage input power-supply system can be respectively US5329439,200780029801.9 patent application with reference to following two number of patent applications.
Summary of the invention
The technical problem to be solved in the present invention is that big, the inefficient defective of above-mentioned power loss at prior art provides a kind of high efficiency low-loss power-supply system.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of power-supply system, comprising:
Filter connects the multi-phase AC power input of input;
Switch matrix connects the multi-phase AC power input after described filter filtering is handled, and described switch matrix comprises a plurality of bidirectional switch assemblies, is used for multi-phase AC power input carrying out high frequency processing and output dc voltage are realized ZVS;
Resonant network connects described switch matrix, and being used to realize resonance and controlling output current is sinusoidal current;
Rectifier connects described resonant network, is used for the sinusoidal current of resonant network output is carried out rectification and filtering, and the output direct current is realized ZCS.
In power-supply system of the present invention, described resonant network comprises transformer, and described rectifier comprises rectifier switch and filter circuit; The secondary winding of the described transformer of described rectifier switch one termination, the described filter circuit of another termination.
In power-supply system of the present invention, described multi-phase AC power is a three-phase;
Described switch matrix comprises 6 bidirectional switch assemblies, and wherein 3 bidirectional switch assembly one ends connect described three-phase alternating-current supply input respectively, and the other end is intersected in a p; Other 3 bidirectional switch assembly one ends connect described three-phase alternating-current supply input respectively, and the other end is intersected in a n.
In power-supply system of the present invention, wherein said bidirectional switch assembly comprises one of following or combination: MOSFET pipe, JFET, IGBT, diode.
In power-supply system of the present invention, described resonant network comprises electric capacity, inductance, transformer; Inductance one is terminated at a p, and electric capacity one is terminated at a n, the former limit winding of another termination transformer of the other end of inductance and electric capacity.
In power-supply system of the present invention, described resonant network comprises transformer, electric capacity at least; One of electric capacity is terminated at a n, an end of the former limit winding of another termination transformer of electric capacity, the other end contact p of the former limit winding of transformer.
In power-supply system of the present invention, described resonant network comprises electric capacity, first inductance, second inductance, transformer;
Electric capacity one tip node n, another termination second inductance one end;
Another termination first inductance one end of second inductance, the first inductance other end contact p;
The former limit winding cross-over connection of transformer is in the second inductance two ends.
In power-supply system of the present invention, described filter circuit comprises filter capacitor, and described filter capacitor is connected between the end and centre cap of described transformer secondary winding.
In power-supply system of the present invention, described filter circuit comprises and is connected across described transformer secondary winding two ends and first filter capacitor that is connected in series and second filter capacitor that the node of described first filter capacitor and described second filter capacitor is connected to the centre cap of described transformer secondary winding.
In power-supply system of the present invention, described rectifier switch comprise following any: MOSFET pipe, diode, full-wave rectifier, full-bridge rectifier.
The invention has the beneficial effects as follows that power-supply system can realize that the input of at least 2 phase AC power supplies is converted to direct current.All switch matrix in the power-supply system can be realized ZVS, and resonant network can be realized resonance.Synchronous rectification switch in the rectifier can be realized ZCS.Owing to do not have filter inductance in the rectifier, so synchronous rectification switch stress can be selected twice output voltage stress switch.ZVS and ZCS have improved efficient, and have reduced the loss of switching process to a great extent.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 shows the single-phase switch power supply schematic diagram that uses in the prior art;
Fig. 2 shows another single-phase switch power supply schematic diagram that uses in the prior art;
Fig. 3 shows in the prior art three-phase input power-supply system schematic diagram based on Vienna PFC;
Fig. 4 shows three-phase single-level full-bridge phase-shifted topology schematic diagram in the prior art;
Fig. 5 is the heterogeneous AC-DC power system structure schematic diagram according to one embodiment of the invention;
Fig. 6 is the three-phase AC-DC power-supply system schematic diagram according to one embodiment of the invention;
Fig. 7 is the three-phase AC-DC power-supply system phase voltage input oscillogram according to one embodiment of the invention;
Fig. 8 is the three-phase AC-DC power-supply system line voltage input oscillogram according to one embodiment of the invention;
Fig. 9 is that the voltage difference Vpn at a master switch p, n point-to-point transmission in the cycle according to the three-phase AC-DC power-supply system of one embodiment of the invention changes schematic diagram to the time;
Figure 10 is at t0-t1 on off state schematic diagram constantly according to the three-phase AC-DC power-supply system of one embodiment of the invention;
Figure 11 is at t1-t2 on off state schematic diagram constantly according to the three-phase AC-DC power-supply system of one embodiment of the invention;
Figure 12 is at t2-t3 on off state schematic diagram constantly according to the three-phase AC-DC power-supply system of one embodiment of the invention;
Figure 13 is at t3-t4 on off state schematic diagram constantly according to the three-phase AC-DC power-supply system of one embodiment of the invention;
Figure 14 is at t5-t6 on off state schematic diagram constantly according to the three-phase AC-DC power-supply system of one embodiment of the invention;
Figure 15 is at t6-t7 on off state schematic diagram constantly according to the three-phase AC-DC power-supply system of one embodiment of the invention;
Figure 16 is at t7-t8 on off state schematic diagram constantly according to the three-phase AC-DC power-supply system of one embodiment of the invention;
Figure 17 is transformer secondary synchronous rectification current waveform, resonant inductance Lr current waveform, Vpn waveform and the resonance capacitor C r voltage according to the three-phase AC-DC power-supply system of one embodiment of the invention.
Figure 18 is at t2-t3 Dead Time former limit switch ZVS and secondary-side switch ZCS process schematic diagram constantly according to the three-phase AC-DC power-supply system of one embodiment of the invention;
Figure 19 is at t4-t5 Dead Time former limit switch ZVS and secondary-side switch ZCS process schematic diagram constantly according to the three-phase AC-DC power-supply system of one embodiment of the invention;
Figure 20 is at t6-t7 Dead Time former limit switch ZVS and secondary-side switch ZCS process schematic diagram constantly according to the three-phase AC-DC power-supply system of one embodiment of the invention;
Figure 21 is the switch matrix topology schematic diagram according to another embodiment of the present invention;
Figure 22 is the resonant network topology schematic diagram according to another embodiment of the present invention;
Figure 23 is the resonant network topology schematic diagram according to another embodiment of the present invention;
Figure 24 is the resonant network topology schematic diagram according to another embodiment of the present invention;
Figure 25 is the rectifier topology schematic diagram according to another embodiment of the present invention;
Figure 26 is the rectifier topology schematic diagram according to another embodiment of the present invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Fig. 5 is the heterogeneous AC-DC power system structure schematic diagram according to one embodiment of the invention.Heterogeneous AC-DC power-supply system comprises filter 501, switch matrix 502, resonant network 503 and rectifier 504.Filter 501 is connected to the multi-phase AC power input.Switch matrix 502 connects the multi-phase AC power input after described filter 501 Filtering Processing, and described switch matrix 502 comprises a plurality of bidirectional switch assemblies, is used for multi-phase AC power input is handled and output dc voltage, realizes ZVS.Resonant network 503 connects described switch matrix 502, and being used to realize resonance and controlling output current is sinusoidal current.Rectifier 504 connects described resonant network 503, is used for the sinusoidal current of resonant network output is carried out rectification and filtering, and the output direct current is realized ZCS.
Fig. 6 is the three-phase AC-DC power-supply system schematic diagram according to one embodiment of the invention.This three-phase AC-DC power-supply system comprises filter 601, switch matrix 602, resonant network 603, rectifier 604.Resistance R shown in it is load.
It should be noted that resonant network 603, rectifier 604 among Fig. 6 are not limited to the three-phase ac power system, also can be 2 phase or more heterogeneous power-supply systems.
Switch matrix 602 comprises 6 bidirectional switchs (a1, a2, b1, b2, c1, c2), and wherein 3 switches (a1, b1, c1) end is connected to the three-phase of three-phase alternating-current supply input respectively, and an other end is summarized in a p.Other 3 switches (a2, b2, c2) end is connected to the three-phase of three-phase alternating-current supply input respectively, and an other end is summarized in a n.In wherein said 6 bidirectional switchs each for example is made up of 2 MOSFET pipes, and promptly 6 bidirectional switchs have 12 MOSFET pipe compositions.Can certainly be made up of 12 JFET parallel diodes, also can be IGBT, all can use so long as can realize power tube, diode or the combination of other power tubes of bidirectional switch.12 switches of switch matrix can be realized ZVS.
Should be understood that the former limit of transformer T winding, capacitor C r, inductance L r three's the order of connection is not limited to aforesaid way in the above-mentioned resonant network 603, as long as series connection.In addition, wherein inductance also may be integrated in the transformer, electric capacity and transformer hardware so only occur, perhaps the independent former limit of the transformer winding that is parallel to of the magnetizing inductance in the transformer.The follow-up distressed structure that will introduce some resonant networks.Resonant network comprises LC resonance, series resonance SRC, parallel resonance PRC, LLC resonance, LCC resonance or the like, is example only herein, and the present invention is not limited to this.
Rectifier 604 comprises rectifier switch Ss1 and Ss2 (such as but not limited to synchronous rectification switch Ss1 and Ss2) and filter circuit.The filter circuit here for example adopts capacitor C o, and Ss1 and Ss2 are connected in series in the two ends of transformer secondary winding, and the node of Ss1 and Ss2 is connected in the end of capacitor C o, and the other end of capacitor C o is connected in the centre cap of transformer secondary winding, as shown in Figure 6.Secondary synchronous rectification switch Ss1, Ss2 can realize ZCS.Optional the using such as but not limited to MOSFET of Ss1 here and Ss2 managed.The rectifier switch here also can be rectifier diode, full-wave rectifier or full-bridge rectifier except the synchronous rectification switch of selecting the MOSFET composition for use.
Technical scheme of the present invention has following characteristic:
1), 12 switches such as a1 can be realized the ZVS switch.
2), Lr, Cr, T constitute resonant network realization resonance.
3), secondary winding synchronous rectification switch Ss1, Ss2 can realize ZCS.
4), there is not filter inductance owing to behind the synchronous rectification switch, so synchronous rectification switch stress can be selected both sides output voltage stress switch.
ZVS and ZCS have improved power efficiency, and have reduced the loss of switching process to a great extent.
Introduce the operation principle of three-phase AC-DC power-supply system of the present invention below.
The three-phase AC power supplies is sent into switch matrix behind filter, form square-wave voltage source 2 of pn, sends into the sinusoidal current of resonant network output after Lr and Cr filtering and transformer T processing again and sends in the rectifier 504.Resonant inductance energy storage and switching tube output capacitance resonance transducing in the switching process, the ZVS of realization switching tube.Because transformer secondary winding is output as sinusoidal current, make the output rectifier switching tube realize the nature change of current, promptly realize ZCS.The approximate resonant network frequency that is equal to Lr and Cr composition of 2 square wave frequencies of pn that the switching frequency of switch matrix forms, make resonant network be input as square-wave voltage source, be output as sinusoidal current, sinusoidal current is exported through generating direct current DC after the Filtering Processing through transformer T and rectifier.Output voltage is such as but not limited to 53.5V or negative 48V.
Three-phase alternating voltage input waveform such as Fig. 7, shown in 8, Fig. 7 is phase voltage waveform figure, Fig. 8 is the line voltage oscillogram, every differing is 60 degree, have two symbols identical in the amplitude of three phase voltages, another one symbol difference is as Fig. 7, in shown in 8 60～120 degree is interval (frame of broken lines zone), Vu＞0, Vv＜0, Vw＜0 is in this quadrant, line voltage uv and uw maximum, and in this 60 degree, its waveform is based on ag1=90 degree symmetry, still consider earlier 60～90 degree interval in operation principle, other intervals roughly the same, this 30 the degree interval line voltage uv greater than line voltage uw.Wherein the transverse axis of Fig. 7 and Fig. 8 is phase angle value (ag1), and Fig. 7 longitudinal axis is three phase voltage value (Vu, Vv, Vw), and Fig. 7 longitudinal axis is three line magnitudes of voltage (Vuv, Vvw, Vwu).Waveform shown in Figure 7 shows the situation of change along with the variation phase voltage of phase value, and waveform shown in Figure 8 shows the situation of change along with the variation line voltage of phase value.
Below the operation principle of power-supply system of the present invention is done detail analysis.
Fig. 9 is that the three-phase AC-DC power-supply system according to one embodiment of the invention changes schematic diagram at the voltage difference Vpn of a master switch p, n point-to-point transmission in the cycle to the time.As shown in Figure 9, transverse axis is time t, and the longitudinal axis is the voltage difference Vpn of p, n point-to-point transmission, and switch matrix 502 total switch periods are t0-t8, the t0-t4 time period is switch matrix a1, a2, b1, b2 one-period Ts1, and the t4-t8 time period is switch matrix a1, a2, c1, c2 one-period Ts2.
At t0-t1 constantly, be Dead Time, a1, a2 conducting at this moment, as shown in figure 10, Vpn equals 0.Fig. 9 is at t0-t1 on off state schematic diagram (filter segment is not shown, and Figure 10-15 is also like this) constantly according to the three-phase AC-DC power-supply system of one embodiment of the invention.Three phase mains is input as u, v, w.
Figure 11 is at t1-t2 on off state schematic diagram constantly according to the three-phase AC-DC power-supply system of one embodiment of the invention.T1-t2 is the biography energy stage constantly, a1, b2 conducting, and Vpn equals the line voltage (Vuv) of uv, the Ss2 conducting.
Figure 12 is at t2-t3 on off state schematic diagram constantly according to the three-phase AC-DC power-supply system of one embodiment of the invention.T2-t3 is Dead Time constantly, b1, b2 conducting, and Vpn equals 0.
Figure 13 is at t3-t4 on off state schematic diagram constantly according to the three-phase AC-DC power-supply system of one embodiment of the invention.T3-t4 is the biography energy stage constantly, a2, b1 conducting, and Vpn equals negative line voltage (Vuv), the Ss1 conducting of uv.
T4-t5 is Dead Time constantly, a1, a2 conducting, and as shown in Figure 9, Vpn equals 0.
Figure 14 is at t5-t6 on off state schematic diagram constantly according to the three-phase AC-DC power-supply system of one embodiment of the invention.T5-t6 is the biography energy stage constantly, a1, c2 conducting, and Vpn equals the line voltage (Vuw) of uw, the Ss2 conducting.
Figure 15 is at t6-t7 on off state schematic diagram constantly according to the three-phase AC-DC power-supply system of one embodiment of the invention.T6-t7 is Dead Time constantly, c1, c2 conducting, and Vpn equals 0.
Figure 16 is at t7-t8 on off state schematic diagram constantly according to the three-phase AC-DC power-supply system of one embodiment of the invention.T7-t8 is the biography energy stage constantly, a2, c1 conducting, and Vpn equals negative line voltage (Vuw), the Ss1 conducting of uw.
Figure 17 is transformer secondary synchronous rectification current waveform, resonant inductance current waveform, Vpn waveform and the resonance capacitor C r voltage according to the three-phase AC-DC power-supply system of one embodiment of the invention.Abscissa of four width of cloth figure is t shown in it, and ordinate is respectively transformer secondary synchronous rectification current i d_s1 and id_s2, resonant inductance current i 1r, Vpn, resonant capacitance Cr voltage Vcr from top to bottom.
Figure 18 is at t2-t3 Dead Time transformer former limit switch ZVS and secondary-side switch ZCS process schematic diagram constantly according to the three-phase AC-DC power-supply system of one embodiment of the invention.Abscissa of four width of cloth figure is t shown in it, ordinate is respectively vds_b1 (voltage between switch b1 drain D and source S) and vgs_b1 (switch b1 gate pole G and source S voltage, i.e. switch drive voltage), Vpn, transformer secondary synchronous rectification current i d_s1 and id_s2 from top to bottom.Figure 18 shows the Primary Component waveform how embodiment dead band process switch realizes ZVS and ZCS.
Figure 19 is at t4-t5 Dead Time former limit switch ZVS and secondary-side switch ZCS process schematic diagram constantly according to the three-phase AC-DC power-supply system of one embodiment of the invention.Abscissa of four width of cloth figure is t shown in it, and ordinate is respectively vds_a1 and vgs_a1, Vpn, transformer secondary synchronous rectification current i d_s1 and id_s2 from top to bottom.Figure 19 shows the Primary Component waveform how embodiment dead band process switch realizes ZVS and ZCS.
Figure 20 is at t6-t7 Dead Time former limit switch ZVS and secondary-side switch ZCS process schematic diagram constantly according to the three-phase AC-DC power-supply system of one embodiment of the invention.Abscissa of four width of cloth figure is t shown in it, and ordinate is respectively vds_c1 and vgs_c1, Vpn, transformer secondary synchronous rectification current i d_s1 and id_s2 from top to bottom.
Figure 21 is the switch matrix topology schematic diagram according to another embodiment of the present invention.Switch matrix 502 in the power-supply system of the present invention shown in Figure 6 can substitute with the topological structure of Figure 20, also may have the topological structure of other types certainly, only is example, not as limitation of the present invention herein.Switch matrix can have the similar N phase switch matrix that is not equal to the three-phase input, N 〉=2.As shown in figure 20, for 4 phases (N=4) switch matrix, the number of switch is 8, and wherein each switch all can be by forming such as but not limited to 2 MOSFET pipes.The number of switch increases along with the increase of N.
Figure 22-the 24th is according to the resonant network topology schematic diagram of another embodiment of the present invention.Resonant network 603 in the power-supply system of the present invention shown in Figure 6 can use the topological structure of Figure 22-24 to substitute.Resonant network shown in Figure 22 comprises the first inductance L r, capacitor C r, the second inductance L m, transformer T.Be connected with the first inductance L r, the second inductance L m and the capacitor C r of series connection successively between p point and the n point; The former limit winding cross-over connection of transformer T is in the second inductance L m two ends.The second inductance L m is a magnetizing inductance, can be integrated in transformer, also can be independent of outside the transformer.In addition, the order of connection of transformer T, the first inductance L r, capacitor C r in the resonant network is not as long as series connection has other special requirement, and magnetizing inductance Lm will be parallel to the former limit of transformer winding.Resonant network comprises LC resonance, series resonance SRC, parallel resonance PRC, LLC resonance, LCC resonance or the like, is example only herein, and the present invention is not limited to this.
Resonant network shown in Figure 23 comprises inductance L r, capacitor C r, inductance L 2, capacitor C 2, transformer T.Inductance L 2 is in parallel with capacitor C 2, and capacitor C 2 one is terminated at a p, and capacitor C 2 other ends are connected to capacitor C r one end, the former limit of capacitor C r another termination transformer T winding one end, inductance L r one tip node p, the former limit of inductance L r another termination transformer T winding other end.Resonant inductance Lr, capacitor C r form one group of series resonance network, and inductance L 2, capacitor C 2 form one group of series resonant network, and series resonance network and series resonant network are cascaded to use and form two resonant frequency points.The illustrated order of connection only is example, connects with the series resonance network that inductance L r, capacitor C r form as long as guarantee the series resonant network that inductance L 2, capacitor C 2 form.
Resonant network shown in Figure 24 comprises capacitor C r, transformer T.One of capacitor C r is terminated at a n, former limit winding one end of another termination transformer T of electric capacity, the former limit winding other end contact p of transformer T.Resonant network is imported an end and is connected in a p, and the input other end is connected in a n, and resonant network output is connected to rectifier.Position that illustrated capacitor C r, transformer T connect and order only are example, and the magnetizing inductance that forms resonance with capacitor C r has been integrated in the transformer.Magnetizing inductance also can be independent of outside the transformer, as shown in figure 22.
Resonant network comprises LC resonance, series resonance SRC, parallel resonance PRC, LLC resonance, LCC resonance or the like.Resonant network topological structure shown in Figure 22-24 is an example only, and the present invention is not limited to this.
Figure 25-the 26th is according to the rectifier topology schematic diagram of another embodiment of the present invention.Rectifier 504,604 in the power-supply system of the present invention shown in Fig. 5,6 can use the topological structure of Figure 25-26 to substitute.Rectifier shown in Figure 25 comprises diode Ss1 and Ss2 and filter (electric capacity).Ss1 and Ss2 are connected on transformer secondary winding and the filter.Secondary Ss1 and Ss2 select diode for use.Rectifier shown in Figure 26 comprises Ss1 and Ss2 (synchronous rectification switch) and filter (two electric capacity).Ss1 and Ss2 are connected on transformer secondary winding and the filter.Optional the using such as but not limited to MOSFET of the Ss1 of secondary and Ss2 managed.
The distressed structure of switch matrix as described above, resonant network and rectifier only is an example, not as limitation of the present invention, is included in protection scope of the present invention as long as can reach the topological structure of the object of the invention.The resonant network of Figure 22-26 and the distressed structure of rectifier can be used for heterogeneous ac power system, include but not limited to two-phase, three-phase or the like.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a power-supply system is characterized in that, comprising:
Filter connects the multi-phase AC power of importing;
Switch matrix connects the multi-phase AC power input after described filter filtering is handled, and described switch matrix comprises a plurality of bidirectional switch assemblies, is used for multi-phase AC power input carrying out high frequency processing and output dc voltage;
Resonant network connects described switch matrix, and being used to realize resonance and controlling output current is sinusoidal current;
Rectifier connects described resonant network, is used for the sinusoidal current of resonant network output being carried out rectification and filtering, the output direct current.
2. power-supply system according to claim 1 is characterized in that described resonant network comprises transformer, and described rectifier comprises rectifier switch and filter circuit; The secondary winding of the described transformer of described rectifier switch one termination, the described filter circuit of another termination.
3. according to each described power-supply system of claim 1～2, it is characterized in that,
Described multi-phase AC power is a three-phase;
Described switch matrix comprises 6 bidirectional switch assemblies, and wherein 3 bidirectional switch assembly one ends connect described three-phase alternating-current supply input respectively, and the other end is intersected in a p; Other 3 bidirectional switch assembly one ends connect described three-phase alternating-current supply input respectively, and the other end is intersected in a n.
4. power-supply system according to claim 3 is characterized in that, wherein said bidirectional switch assembly comprises one of following or combination: MOSFET pipe, JFET, IGBT, diode.
5. power-supply system according to claim 3 is characterized in that described resonant network comprises electric capacity, inductance, transformer; Inductance one is terminated at a p, and electric capacity one is terminated at a n, the former limit winding of another termination transformer of the other end of inductance and electric capacity.
6. power-supply system according to claim 3 is characterized in that described resonant network comprises transformer, electric capacity; One of electric capacity is terminated at a n, an end of the former limit winding of another termination transformer of electric capacity, the other end contact p of the former limit of transformer winding.
7. power-supply system according to claim 3 is characterized in that, described resonant network comprises electric capacity, first inductance, second inductance, transformer;
Electric capacity one tip node n, another termination second inductance one end;
Another termination first inductance one end of second inductance, the first inductance other end contact p;
The former limit winding cross-over connection of transformer is in the second inductance two ends.
8. power-supply system according to claim 2 is characterized in that described filter circuit comprises filter capacitor, and described filter capacitor is connected between the end and centre cap of described transformer secondary winding.
9. power-supply system according to claim 2, it is characterized in that, described filter circuit comprises and is connected across described transformer secondary winding two ends and first filter capacitor that is connected in series and second filter capacitor that the node of described first filter capacitor and described second filter capacitor is connected to the centre cap of described transformer secondary winding.
10. according to claim 3 or 9 described power-supply systems, it is characterized in that, described rectifier switch comprise following any: MOSFET pipe, diode, full-wave rectifier, full-bridge rectifier.
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| CN104065283A (en) * | 2014-07-03 | 2014-09-24 | 苏州奥曦特电子科技有限公司 | Bridge-free type PRC alternating-current-to-direct-current power converter |
| CN108631622A (en) * | 2018-05-29 | 2018-10-09 | 西南交通大学 | A kind of control system and method applied to AC-DC matrix converters |
| CN108631621A (en) * | 2018-05-28 | 2018-10-09 | 西南交通大学 | Control method, control device, output system and the storage medium of AC-DC converter |
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| CN103501122A (en) * | 2013-10-06 | 2014-01-08 | 徐宏 | Isolating-type matrix converter and sector handoff soft switching method |
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| CN108631621A (en) * | 2018-05-28 | 2018-10-09 | 西南交通大学 | Control method, control device, output system and the storage medium of AC-DC converter |
| CN108631621B (en) * | 2018-05-28 | 2019-11-08 | 西南交通大学 | Control method, control device, output system and the storage medium of AC-DC converter |
| CN108631622A (en) * | 2018-05-29 | 2018-10-09 | 西南交通大学 | A kind of control system and method applied to AC-DC matrix converters |
| CN108631622B (en) * | 2018-05-29 | 2019-08-06 | 西南交通大学 | A kind of control system and method applied to AC-DC matrix converter |
| US11451139B2 (en) * | 2019-01-22 | 2022-09-20 | Queen's University At Kingston | Three-phase single-stage soft-switching AC-DC converter with power factor correction |
| CN111193421A (en) * | 2020-04-15 | 2020-05-22 | 南昌杜迪电子技术有限公司 | Three-phase isolation AC-DC converter |
| CN111193421B (en) * | 2020-04-15 | 2020-07-28 | 南昌杜迪电子技术有限公司 | Three-phase isolation AC-DC converter |
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