CN203967994U - Unity power factor single-stage AC-DC converter - Google Patents

Unity power factor single-stage AC-DC converter Download PDF

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Publication number
CN203967994U
CN203967994U CN201420288498.1U CN201420288498U CN203967994U CN 203967994 U CN203967994 U CN 203967994U CN 201420288498 U CN201420288498 U CN 201420288498U CN 203967994 U CN203967994 U CN 203967994U
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converter
stage
bridge
primary side
secondary side
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王广柱
王明达
李峰
张勋
王婷
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Shandong University
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Shandong University
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/56Power conversion systems, e.g. maximum power point trackers

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Abstract

The utility model discloses unity power factor single-stage AC-DC converter, the filter circuit that comprises AC power and be connected with AC power, filtered signal is sent to rectifier rectification processing by described filter circuit, the input that is sent to isolation type DC-DC converter through the signal of rectifier rectification, the output of isolation type DC-DC converter is connected with load with after capacitor C 1 parallel connection.The utility model can be realized bidirectional single-stage AC-DC or DC-AC isolated variable, convenient for battery charging/discharging or parallel network power generation, also can realize cascade module single-stage isolated AC-DC conversion, exchange input application scenario as electric power electric transformer for high voltage.

Description

Unity power factor single-stage AC-DC converter
Technical field
The utility model relates to Technics of Power Electronic Conversion technical field, is specifically related to a kind of isolation single-stage AC-DC isolated converter and control method thereof with unity power factor.
Background technology
AC-DC isolated converter is generally made up of rectifier and isolation type DC-DC converter, and this class AC-DC converter needs after due to rectifier and the United Nations General Assembly's capacity filtering capacitor, and power factor is lower.For improving power factor, prior art generally adopts increases one-level power factor correction (Power Factor Correction, PFC) circuit between rectifier and isolation type DC-DC converter, as shown in Figure 1.This class AC-DC isolated converter adopts two-stage high frequency conversion, be PFC high frequency conversion and isolated form DC-DC high frequency conversion, conversion efficiency is reduced, because this two-stage high frequency conversion needs the control system of two cover difference in functionalitys, therefore there is the shortcomings such as control circuit complexity, cost are higher.
Utility model content
The deficiency existing for solving prior art, the utility model discloses unity power factor single-stage AC-DC isolated converter, the application has the single-stage of realization high frequency conversion, can realize unity power factor, there is buck ability, can realize the advantages such as output voltage/electric current wide region control.
For achieving the above object, concrete scheme of the present utility model is as follows:
Unity power factor single-stage AC-DC converter, the filter circuit that comprises AC power and be connected with AC power, filtered signal is sent to rectifier rectification processing by described filter circuit, the input that is sent to isolation type DC-DC converter through the signal of rectifier rectification, the output of isolation type DC-DC converter is connected with load with after capacitor C 1 parallel connection.
Described rectifier is passive rectifier, is the single-phase full bridge rectifier circuit of four diode compositions.
Described rectifier is active H bridge rectifier, is the H bridge translation circuit of four power switch pipe compositions with anti-paralleled diode.
Described isolation type DC-DC converter comprises high frequency transformer, the primary side translation circuit being connected with the primary side of high frequency transformer and the secondary side translation circuit being connected with the secondary side of high frequency transformer, and described high frequency transformer is by least one inductance and high frequency transformer windings in series.
Described inductance is the leakage inductance of separate inductor or described high frequency transformer.
Described primary side translation circuit and secondary side translation circuit are the H bridge translation circuit of four power switch pipe compositions with anti-paralleled diode.
Described primary side translation circuit and secondary side translation circuit are two power switch pipe and two semi-bridge alternation circuit that capacitor forms with anti-paralleled diode, a wherein brachium pontis of two described power switch pipe described half-bridge converters in series, described two capacitor's seriess composition forms another brachium pontis of described half-bridge converter.
Described primary side translation circuit and secondary side translation circuit are two power switch pipe and two H bridge mixing transformation devices that diode forms with anti-paralleled diode, a brachium pontis of one of them diode and a power switch pipe described H bridging parallel operation in series, another brachium pontis of another diode and another power switch pipe described H bridging parallel operation in series, be that under two of described H bridging parallel operation upper pipes or two, effective diode replaces, form described H bridge mixing transformation circuit.
The control system of unity power factor single-stage AC-DC converter, comprise composite controller, described composite controller receives single-stage AC-DC isolated converter secondary side DC bus-bar voltage, current signal and secondary side DC bus reference voltage, current signal, and composite controller is processed the voltage of reception and electric current to be converted to alternating current with reference to effective value;
Alternating current is primary side current reference signal with reference to effective value and magnitude of voltage after multiplier computing, and primary side current reference signal, primary side current signal, primary side voltage signal and secondary side voltage signal all input to current controller;
Two inputs of current controller output signal connecting valve signal generator, the output signal of switch signal generator connects the power switch pipe of the isolation type DC-DC converter in single-stage AC-DC isolated converter, for the break-make of power ratio control switching tube, an input of described switch signal generator is also connected with switch synchronizing signal.
Described alternating current with reference to effective value and magnitude of voltage after multiplier computing for the magnitude of voltage in primary side current reference signal be primary side DC bus-bar voltage detection signal by divider divided by input ac voltage rated value U sNafter output valve.
Described alternating current with reference to effective value and magnitude of voltage after multiplier computing for the magnitude of voltage in primary side current reference signal is input ac power u swith the unit amplitude sinusoidal signal u of frequency homophase sinabsolute value | u sin|.
A unity power factor single-stage AC-DC isolated converter system for cascade module, it comprises the individual described unity power factor single-stage AC-DC isolated converter of N (N is more than or equal to 1 integer), a N primary side current control unit and a secondary side composite controller; Described primary side current control unit comprises described current controller, switch signal generator, multiplier and described divider.
The ac input end of N described single-stage AC-DC isolated converter adopts tandem type to connect, the positive/negative of the secondary DC bus of N described single-stage AC-DC isolated converter is connected in parallel respectively, the corresponding each described unity power factor single-stage AC-DC isolated converter of each described primary side current control unit, the output signal I of described secondary side composite controller s *be connected to the input I of each described primary side current control unit s *; The frequency of the switch synchronizing signal CLK of N described primary side current control unit is identical, and CLK1, CLK2 ..., CLKn is 180 °/N of phase shift successively.
The control method of the control system of unity power factor single-stage AC-DC converter, comprises the following steps:
Step 1: the primary side DC bus-bar voltage u that detects the isolation type DC-DC converter in described AC-DC isolated converter d1and current i d1and secondary side DC bus-bar voltage u d2and current i d2;
Step 2: by secondary side DC bus-bar voltage with reference to u d2 *with current reference i d2 *and described secondary side DC bus-bar voltage u d2and current i d2detected value through secondary side composite controller process after produce input AC current effective value with reference to I s *;
Step 3: primary side DC bus-bar voltage u d1divided by input ac voltage rated value U sN, then with described input AC current effective value with reference to I s *multiply each other, obtain described primary side DC bus current with reference to i d1 *, u in formula sNrepresent described input ac voltage rated value;
Step 4: by described primary side DC bus current with reference to i d1 *, primary side DC bus-bar voltage u d1and current i d1and secondary side DC bus-bar voltage u d2detected value be sent to primary side current controller and carry out exporting F after integrated treatment 1and F 2, wherein F 1and F 2be respectively the controlled quentity controlled variable of described primary side and secondary side converter;
Step 5: by F 1and F 2send into after switch signal generator cell processing, output produces the primary side of described isolation type DC-DC converter and the switch controlling signal of secondary side power switch pipe.
In described step 1, also comprise the input ac voltage u that detects described AC-DC isolated converter s, after signed magnitude arithmetic(al), replace described primary side DC bus-bar voltage u d1, i.e. u d1=| u s|.
In described step 1 and step 2, when not needing described secondary side DC bus current i d2while control, ignore i d2detect and process.
In described step 1, described bus current i d1and i d2detection, can be substituted by detecting described power switch tube current.
In described step 3, u d1/ U sNcan use and described input ac voltage u swith the unit amplitude sinusoidal signal u of frequency homophase sinabsolute value | u sin| replace, described primary side DC bus current is with reference to i d1 *for i d1 *=I s *| * u sin|.
Operation principle: the output signal of switch signal generator connects the power switch pipe of the isolation type DC-DC converter in described single-stage AC-DC isolated converter, for the break-make of power ratio control switching tube; The output signal F of current controller 1and F 2connect two inputs of described switch signal generator, the 3rd input of a switch synchronizing signal CLK connecting valve signal generator; The output signal I of secondary side composite controller s *, as the reference of input AC current effective value, isolation type DC-DC converter primary side DC bus-bar voltage detection signal u d1by divider divided by input ac voltage rated value U sNrear output u unit, by I s *with u unitafter multiplying each other by multiplier, be output as primary side current reference signal i d1 *, the output signal i of multiplier d1 *, isolation type DC-DC converter primary side DC bus-bar voltage detection signal u d1with current detection signal i d1, and the secondary side DC bus-bar voltage detection signal u of isolation type DC-DC converter d2be connected to the input of current controller.Described secondary side DC bus-bar voltage u d2and current i d2detection signal and described secondary side DC bus-bar voltage u d2 *with current reference signal i d2 *be connected to the input of described secondary side composite controller.Secondary side composite controller is realized the closed-loop control of secondary side voltage or electric current.In the time that secondary side load is storage battery or solar cell, secondary side composite controller is realized the closed-loop control that discharges and recharges to battery.Switch signal generator is according to input signal F 1with CLK signal, control the break-make of the primary side converter switches pipe of described isolation type DC-DC converter, according to input signal F 2with CLK signal, control the break-make of the secondary side converter switches pipe of described isolation type DC-DC converter, wherein CLK signal is switch synchronizing signal.Switch signal generator can adopt phase shifting control, peak current control or other control modes to produce output switch control signal.
The output u of divider unit=u d1/ U sN, can use and described input ac voltage u swith the unit amplitude sinusoidal signal u of frequency homophase sinabsolute value | u sin| replace, described primary side DC bus current is with reference to i d1 *for i d1 *=I s ** | u sin|.
A kind of unity power factor single-stage AC-DC isolated converter system of cascade module, the ac input end of N described single-stage AC-DC isolated converter adopts tandem type to connect, the first ac input end ac1 of the 1st single-stage AC-DC isolated converter is connected to an input of AC power, the first ac input end ac1 of the 2nd single-stage AC-DC isolated converter is connected to the second ac input end ac2 of described the 1st single-stage AC-DC isolated converter, the first ac input end ac1 of the 3rd single-stage AC-DC isolated converter is connected to the second ac input end ac2 of described the 2nd single-stage AC-DC isolated converter, by that analogy, the first ac input end ac1 of N single-stage AC-DC isolated converter is connected to the second ac input end ac2 of described N-1 single-stage AC-DC isolated converter, the second ac input end ac2 of N single-stage AC-DC isolated converter is connected to another input of described AC power.The positive/negative of the secondary DC bus of N described single-stage AC-DC isolated converter is connected in parallel respectively, the secondary DC bus positive pole that is N described single-stage AC-DC isolated converter links together, and the secondary DC bus negative pole of N described single-stage AC-DC isolated converter links together.The corresponding each described unity power factor single-stage AC-DC isolated converter of each described primary side current control unit, the output signal I of described secondary side composite controller s *be connected to the input I of each described primary side current control unit s *.The frequency of the switch synchronizing signal CLK of N described primary side current control unit is identical, and CLK1, CLK2 ..., CLKn is 180 °/N of phase shift successively.
As another kind of improvement of the present utility model, a kind of Three Phase Unity Power Factor single-stage AC-DC isolated converter system, it comprises three N (N is more than or equal to 1 integer) modularization single-stage AC-DC isolated converter system and a secondary side composite controller, wherein three N modularization single-stage AC-DC isolated converters carry out Y shape or the connection of △ shape, form three-phase single-level AC-DC isolated converter system; The current reference input I of described N modularization single-stage AC-DC isolated converter s *link together, and with the output I of described secondary side composite controller s *be connected.
The beneficial effects of the utility model:
(1) the utility model provides a kind of single-stage AC-DC isolated converter circuit, and whole transformation system only needs one-level high frequency conversion link and one-level large bulk capacitance filtering link, has improved conversion efficiency, has reduced cost.
(2) the utility model can be realized unity power factor, has buck ability, can realize the wide region control of output voltage/electric current.
(3) the utility model can adopt cascade module technology, between each module, realizes automatically equalizing voltage, can be used as electric power electric transformer, exchanges input application scenario for high voltage.
(4) the utility model can be used for Three Phase Unity Power Factor single-stage AC-DC isolated converter.
(5) the utility model can be realized bidirectional single-stage AC-DC or DC-AC isolated variable, convenient for battery charging/discharging or parallel network power generation.
Brief description of the drawings
Fig. 1 is existing twin-stage AC-DC isolated converter;
Fig. 2 is single-stage AC-DC isolated converter of the present utility model;
Fig. 3 is a kind of passive rectifier topological structure;
Fig. 3 a is a kind of H bridge active rectifier topological structure;
Fig. 4 is the synchronous rectification control unit of the H bridge active rectifier of Fig. 3 a;
Fig. 5 is a kind of DC-DC full-bridge isolated inverter main circuit topological structure;
Fig. 5 a is the another kind of form of Fig. 5;
Fig. 6 is a kind of DC-DC half-bridge isolated converter main circuit topological structure;
Fig. 6 a is the another kind of form of Fig. 6;
Fig. 7 is a kind of bi-directional DC-DC full-bridge isolated inverter main circuit topological structure;
Fig. 8 is a kind of single-stage AC-DC isolated converter control system of the present utility model;
Fig. 9 is another kind of single-stage AC-DC isolated converter control system of the present utility model;
Figure 10 is cascade module single-stage AC-DC isolated converter system of the present utility model;
Figure 11 is that three-phase Y shape of the present utility model connects cascade module single-stage AC-DC isolated converter system;
Figure 11 a is that three-phase △ shape of the present utility model connects cascade module single-stage AC-DC isolated converter system;
Wherein, 1, filter circuit, 2, rectifier, 3, isolation type DC-DC converter, 4, single-stage AC-DC isolated converter, 5, secondary side composite controller, 6, primary side current control unit, 7, current controller, 8, switch signal generator, 9, multiplier, 10, divider, 11, phase-locked loop (PLL), 12, comparator, 13, inverter, 14, synchronous rectification control unit, 15, N module single-stage AC-DC isolated converter system.
Embodiment:
Below in conjunction with accompanying drawing, the utility model is elaborated:
Fig. 2 has provided unity power factor single-stage AC-DC isolated converter main circuit calcspar of the present utility model, and it comprises AC filter circuit 1, rectifier circuit 2 and isolation type DC-DC converter 3.Between rectifier circuit 2 and isolation type DC-DC converter 3 without and the United Nations General Assembly's capacity filtering capacitor.
Fig. 3 has provided a kind of passive rectifier circuit structure Fig. 2, comprises four diode Z1~Z4, forms known single-phase full bridge rectifier circuit.
Fig. 3 a has provided a kind of active H bridge rectifier circuit structure chart 2, comprises four power switch pipe Q1~Q4 with anti-paralleled diode, forms known H bridge translation circuit.
The synchronous rectification control unit 14 of the active H bridge rectifier 2 that Fig. 4 has provided, in figure, realizes the comparison to input ac voltage by comparator 12, and inverter 13 is realized logical inversion.As input ac voltage u sbe greater than at 0 o'clock, described comparator 12 output logics " 1 ", described inverter 13 is output as logical zero, switching tube Q1 and the Q4 conducting of the active H bridge rectifier shown in control chart 3a, Q2 and Q3 cut-off, otherwise, as input ac voltage u sbe less than at 0 o'clock, described comparator 12 output logics " 0 ", described inverter 13 is output as logical one, switching tube Q2 and the Q3 conducting of the active H bridge rectifier shown in control chart 3a, Q1 and Q4 cut-off.
Fig. 5 has provided a kind of Uniderectional DC-DC full-bridge isolated inverter main circuit topological structure, in figure, primary side is H bridge high-frequency converter, secondary side is H bridge mixing transformation circuit (being that under two of H bridging parallel operation upper pipes or two, effective diode replaces), has the high frequency transformer Tr (inductance L s can be substituted by the leakage inductance of transformer Tr) of inductance L s between primary side and secondary side for string.This topology has lifting/voltage reducing control ability, or this topology power is one-way flow, realizes power and is flowed to secondary side by primary side, and rectifier circuit 2 can adopt Fig. 3.
Fig. 5 a has provided another kind of Uniderectional DC-DC full-bridge isolated inverter main circuit topological structure, is with the difference of Fig. 5, and Fig. 5 a realizes power and flowed to primary side by secondary side, and rectifier circuit 2 needs to adopt the active H bridge rectifier shown in Fig. 3 a.
Fig. 6 has provided a kind of Uniderectional DC-DC half-bridge isolated converter main circuit topological structure, is with the difference of Fig. 5, and the primary side of Fig. 6 is half-bridge high-frequency converter.
Fig. 6 a has provided a kind of Uniderectional DC-DC half-bridge isolated converter main circuit topological structure, is with the difference of Fig. 5 a, and the secondary side of Fig. 6 a is half-bridge high-frequency converter.
Fig. 7 has provided a kind of bi-directional DC-DC full-bridge isolated inverter main circuit topological structure, in figure, primary side and secondary side all adopt H bridge high-frequency converter, rectifier circuit 2 adopts the active H bridge rectifier shown in Fig. 3 a, can realize the two-way flow of power between primary side and secondary side.This topology has lifting/voltage reducing control ability equally, or
Embodiment 1:
Rectifier 2 in Fig. 2 is realized by Fig. 5 by Fig. 3 realization, DC-DC isolated converter 3, just form a kind of unidirectional unity power factor single-stage bridge-type AC-DC isolated converter main circuit topology, its power is by input AC side (AC) side direction direct current (DC) lateral load transmission (be in Fig. 2, power is transmitted to the right by left side).Primary side DC bus current i d1the available sense switch tube current of detection i s2and i s4or i s1and i s3after addition, replace secondary side DC bus current i d2the available sense switch tube current of detection i s6and i s8after addition, replace.
Embodiment 2:
Rectifier 2 in Fig. 2 is realized by Fig. 5 a by Fig. 3 a realization, DC-DC isolated converter 3, just form the grid-connected DC-AC isolated converter of a kind of unidirectional unity power factor single-stage bridge-type main circuit topology, its power transmits (be in Fig. 2, power is transmitted to the left by right side) by DC side (DC) load to input AC side (AC) side.Primary side DC bus current i d1the available sense switch tube current of detection i s2and i s4after addition, replace secondary side DC bus current i d2the available sense switch tube current of detection i s6and i s8or i s5and i s7after addition, replace.
Embodiment 3:
Rectifier 2 in Fig. 2 is realized by Fig. 6 by Fig. 3 realization, DC-DC isolated converter 3, just form a kind of unidirectional unity power factor single stage semi-bridge type AC-DC isolated converter main circuit topology, its power is by input AC side (AC) side direction direct current (DC) lateral load transmission (be in Fig. 2, power is transmitted to the right by left side).
Embodiment 4:
Rectifier 2 in Fig. 2 is realized by Fig. 6 a by Fig. 3 a realization, DC-DC isolated converter 3, just form the grid-connected DC-AC isolated converter of a kind of unidirectional unity power factor single stage semi-bridge type main circuit topology, its power transmits (be in Fig. 2, power is transmitted to the left by right side) by DC side (DC) load to input AC side (AC) side.
Embodiment 5:
Rectifier 2 in Fig. 2 is realized by Fig. 7 by Fig. 3 a realization, DC-DC isolated converter 3, just forms a kind of two-way unity power factor single-stage bridge-type AC-DC isolated converter main circuit topology, and its power can be realized transmitted in both directions.Primary side DC bus current i d1the available sense switch tube current of detection i s2and i s4or i s1and i s3after addition, replace secondary side DC bus current i d2the available sense switch tube current of detection i s6and i s8or i s5and i s7after addition, replace.
Embodiment 6
Fig. 8 has provided a kind of single-stage AC-DC isolated converter control system of the present utility model, and it comprises secondary side composite controller 5 and primary side current control unit 6.Described primary side current control unit 6 comprises current controller 7, switch signal generator 8, multiplier 9 and divider 10.The output signal of described switch signal generator 8 connects the power switch pipe of the isolation type DC-DC converter 3 in described single-stage AC-DC isolated converter 4, for the break-make of power ratio control switching tube; The output signal F of described current controller 7 1and F 2connect two inputs of described switch signal generator 8, a switch synchronizing signal CLK connects the 3rd input of described switch signal generator 8; The output signal I of described secondary side composite controller 5 s *, as the reference of input AC current effective value, described isolation type DC-DC converter 3 primary side DC bus-bar voltage detection signal u d1by described divider 10 divided by input ac voltage rated value U sNrear output u unit, by I s *with u unitafter multiplying each other by described multiplier 9, be output as primary side current reference signal i d1 *, the output signal i of described multiplier 9 d1 *, described isolation type DC-DC converter 3 primary side DC bus-bar voltage detection signal u d1with current detection signal i d1, and the secondary side DC bus-bar voltage detection signal u of described isolation type DC-DC converter 3 d2be connected to the input of described current controller 7.Described secondary side DC bus-bar voltage u d2and current i d2detection signal and described secondary side DC bus-bar voltage u d2 *with current reference signal i d2 *be connected to the input of described secondary side composite controller 5.
Described secondary side composite controller 5 is realized the closed-loop control of secondary side voltage or electric current.In the time that secondary side load is storage battery or solar cell, described secondary side composite controller 5 is realized the closed-loop control that discharges and recharges to battery.
Described switch signal generator 8 is according to input signal F 1with CLK signal, control the break-make of the primary side converter switches pipe S1~S4 of described isolation type DC-DC converter 3, according to input signal F 2with CLK signal, control the break-make of the secondary side converter switches pipe S5~S8 of described isolation type DC-DC converter 3, wherein CLK signal is switch synchronizing signal.Described switch signal generator 8 can adopt phase shifting control, peak current control or other control modes to produce output switch control signal.
When described switch signal generator 8 adopts phase shifting control, for embodiment 1, F 1represent the phase shifting angle between primary side left/right brachium pontis switching signal, F 2represent the phase shifting angle between secondary side and primary side switching signal, secondary side switches pipe S6 and S8 are the complementary control of square wave.For embodiment 2, F 2represent the phase shifting angle between secondary side left/right brachium pontis switching signal, F 1represent the phase shifting angle between primary side and secondary side switches signal, primary side switching tube S2 and S4 are the complementary control of square wave.For embodiment 3, F 1represent the pulse duration of primary side switching tube S1 and S2 switching signal, F 2represent the phase shifting angle between secondary side and primary side switching signal, secondary side switches pipe S6 and S8 are the complementary control of square wave.For embodiment 4, F 2represent the pulse duration of switching tube S5 and S6 switching signal, F 1represent the phase shifting angle between primary side and secondary side switches signal, primary side switching tube S2 and S4 are the complementary control of square wave.For embodiment 5, in the time that power transmits (be in Fig. 2, power is transmitted to the right by left side) by input AC side (AC) side direction direct current (DC) lateral load, F 1represent the phase shifting angle between primary side left/right brachium pontis switching signal, F 2represent the phase shifting angle between secondary side and primary side switching signal, secondary side switches pipe S6 and S8 are the complementary control of square wave, switching tube S5 and S7 cut-off; In the time that power transmits (be in Fig. 2, power is transmitted to the left by right side) by DC side (DC) load to input AC side (AC) side, F 2represent the phase shifting angle between secondary side left/right brachium pontis switching signal, F 1represent the phase shifting angle between primary side and secondary side switches signal, primary side switching tube S2 and S4 are the complementary control of square wave, switching tube S1 and S3 cut-off.
In the time that described rectifier 2 adopts the active H bridge rectifier shown in Fig. 3 a, synchronous commutating control circuit 14 is as shown in Figure 4 realized the synchronous rectification of described active H bridge rectifier 2.
Embodiment 7
Fig. 9 has provided another kind of single-stage AC-DC isolated converter control system of the present utility model, is with the main distinction of Fig. 8: an input u of the multiplier 9 in Fig. 8 unitwith with described input ac voltage u swith the unit amplitude sinusoidal signal u of frequency homophase sinabsolute value | u sin| replace, wherein | u sin| be the output u of phase-locked loop (PLL) 11 sinask absolute value, described like this primary side DC bus current is with reference to i again d1 *for i d1 *=I s ** | u sin|.
Embodiment 8
Figure 10 has provided a kind of cascade module single-stage AC-DC isolated converter system, and it comprises the individual described unity power factor single-stage AC-DC isolated converter 4 of N (N is more than or equal to 1 integer), a N described primary side current control unit 6 and a secondary side composite controller 5.The ac input end of N described single-stage AC-DC isolated converter 4 adopts tandem type to connect, the first ac input end ac1 of the 1st single-stage AC-DC isolated converter 4 is connected to an input of AC power, the first ac input end ac1 of the 2nd single-stage AC-DC isolated converter is connected to the second ac input end ac2 of described the 1st single-stage AC-DC isolated converter 4, the first ac input end ac1 of the 3rd single-stage AC-DC isolated converter 4 is connected to the second ac input end ac2 of described the 2nd single-stage AC-DC isolated converter 4, by that analogy, the first ac input end ac1 of N single-stage AC-DC isolated converter 4 is connected to the second ac input end ac2 of described N-1 single-stage AC-DC isolated converter 4, the second ac input end ac2 of N single-stage AC-DC isolated converter 4 is connected to another input of described AC power.The positive/negative of the secondary DC bus of N described single-stage AC-DC isolated converter 4 is connected in parallel respectively, the secondary DC bus positive pole that is N described single-stage AC-DC isolated converter 4 links together, and the secondary DC bus negative pole of N described single-stage AC-DC isolated converter 4 links together.
The corresponding each described unity power factor single-stage AC-DC isolated converter 4 of each described primary side current control unit 6, the output signal I of described secondary side composite controller 5 s *be connected to the input I of each described primary side current control unit 6 s *.The frequency of the switch synchronizing signal CLK of N described primary side current control unit 6 is identical, and CLK1, CLK2 ..., CLKn is 180 °/N of phase shift successively.
Described unity power factor single-stage AC-DC isolated converter 4 can be to be made up of the unidirectional single-stage AC-DC isolated converter in embodiment 1~4, can be also that the bidirectional single-stage AC-DC isolated converter in embodiment 5 forms.
Embodiment 9
Figure 11 has provided a kind of three-phase Y shape and has connected cascade module single-stage AC-DC isolated converter system, and it comprises three N (N is more than or equal to 1 integer) module single-stage AC-DC isolated converter system 15 and a secondary side composite controller 5.The first ac input end N1 of described three N module single-stage AC-DC isolated converter systems 15 connects respectively the output of three phase mains, and the second ac input end N2 of described three N module single-stage AC-DC isolated converter systems 15 links together; The current reference input I of described three-phase N module single-stage AC-DC isolated converter system 15 s *link together, and with the output I of described secondary side composite controller 5 s *be connected.
Embodiment 10
Figure 11 a has provided a kind of three-phase △ shape and has connected cascade module single-stage AC-DC isolated converter system, and it comprises three N (N is more than or equal to 1 integer) module single-stage AC-DC isolated converter system 15 and a secondary side composite controller 5.Two ac input end N1 of described three N module single-stage AC-DC isolated converter systems 15 and N2 are connected across respectively the output of three phase mains successively, two the ac input end N1 and the N2 that are a phase N module single-stage AC-DC isolated converter system 15 are connected across a phase and the output of b phase power supply, two ac input end N1 of b phase N module single-stage AC-DC isolated converter system 15 and N2 are connected across b phase and the output of c phase power supply, and two ac input end N1 and the N2 of c phase N module single-stage AC-DC isolated converter system 15 are connected across c phase and the output of a phase power supply; The current reference input I of described three-phase N module single-stage AC-DC isolated converter system 15 s *link together, and with the output I of described secondary side composite controller 5 s *be connected.
By reference to the accompanying drawings embodiment of the present utility model is described although above-mentioned; but the not restriction to the utility model protection range; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendments that creative work can make or distortion still in protection range of the present utility model.

Claims (8)

1. unity power factor single-stage AC-DC converter, it is characterized in that, the filter circuit that comprises AC power and be connected with AC power, filtered signal is sent to rectifier rectification processing by described filter circuit, the input that is sent to isolation type DC-DC converter through the signal of rectifier rectification, the output of isolation type DC-DC converter is connected with load with after capacitor C 1 parallel connection.
2. unity power factor single-stage AC-DC converter as claimed in claim 1, is characterized in that, described rectifier is passive rectifier, is the single-phase full bridge rectifier circuit of four diode compositions.
3. unity power factor single-stage AC-DC converter as claimed in claim 1, is characterized in that, described rectifier is active H bridge rectifier, is the H bridge translation circuit of four power switch pipe compositions with anti-paralleled diode.
4. unity power factor single-stage AC-DC converter as claimed in claim 1, it is characterized in that, described isolation type DC-DC converter comprises high frequency transformer, the primary side translation circuit being connected with the primary side of high frequency transformer and the secondary side translation circuit being connected with the secondary side of high frequency transformer, and described high frequency transformer is made up of at least one inductance and high frequency transformer windings in series.
5. unity power factor single-stage AC-DC converter as claimed in claim 4, is characterized in that, described inductance is the leakage inductance of separate inductor or described high frequency transformer.
6. unity power factor single-stage AC-DC converter as claimed in claim 4, is characterized in that, described primary side translation circuit and secondary side translation circuit are the H bridge translation circuit of four power switch pipe compositions with anti-paralleled diode.
7. unity power factor single-stage AC-DC converter as claimed in claim 4, it is characterized in that, described primary side translation circuit and secondary side translation circuit are two power switch pipe and two semi-bridge alternation circuit that capacitor forms with anti-paralleled diode, a wherein brachium pontis of two described power switch pipe described half-bridge converters in series, described two capacitor's seriess composition forms another brachium pontis of described half-bridge converter.
8. unity power factor single-stage AC-DC converter as claimed in claim 4, it is characterized in that, described primary side translation circuit and secondary side translation circuit are two power switch pipe and two H bridge mixing transformation devices that diode forms with anti-paralleled diode, a brachium pontis of one of them diode and a power switch pipe described H bridging parallel operation in series, another brachium pontis of another diode and another power switch pipe described H bridging parallel operation in series, be that under two of described H bridging parallel operation upper pipes or two, effective diode replaces, form described H bridge mixing transformation circuit.
CN201420288498.1U 2014-05-30 2014-05-30 Unity power factor single-stage AC-DC converter Expired - Fee Related CN203967994U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105846549A (en) * 2015-01-13 2016-08-10 山东大学 Non-contact power transmission system and control method
WO2017206011A1 (en) * 2016-05-30 2017-12-07 Abb Schweiz Ag Ac-dc power converter and method therefor
CN110492769A (en) * 2019-08-14 2019-11-22 深圳威迈斯新能源股份有限公司 Single-stage AC-DC converter circuit with power factor emendation function
CN115552782A (en) * 2020-05-06 2022-12-30 沃特洛电气制造公司 Isolated power converter for thermodynamic system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105846549A (en) * 2015-01-13 2016-08-10 山东大学 Non-contact power transmission system and control method
CN105846549B (en) * 2015-01-13 2018-09-21 山东大学 A kind of contactless power transmission system and control method
WO2017206011A1 (en) * 2016-05-30 2017-12-07 Abb Schweiz Ag Ac-dc power converter and method therefor
CN109196768A (en) * 2016-05-30 2019-01-11 Abb瑞士股份有限公司 AC-DC power adapter and method for the power adapter
CN109196768B (en) * 2016-05-30 2021-01-15 Abb瑞士股份有限公司 AC-DC power converter and method for the same
CN110492769A (en) * 2019-08-14 2019-11-22 深圳威迈斯新能源股份有限公司 Single-stage AC-DC converter circuit with power factor emendation function
CN115552782A (en) * 2020-05-06 2022-12-30 沃特洛电气制造公司 Isolated power converter for thermodynamic system

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