CN102158071B - Series-connected bridge-type impedance network power converter - Google Patents
Series-connected bridge-type impedance network power converter Download PDFInfo
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- CN102158071B CN102158071B CN201110085924.2A CN201110085924A CN102158071B CN 102158071 B CN102158071 B CN 102158071B CN 201110085924 A CN201110085924 A CN 201110085924A CN 102158071 B CN102158071 B CN 102158071B
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Abstract
The invention discloses a series-connected bridge-type impedance network power converter. The series-connected bridge-type impedance network power converter is formed by connecting a first inductor (L1), a first capacitor (C1), a second inductor (L2) and a second capacitor (C2) in series from end to end in turn. A two-way switch (33) is diagonally connected to two connecting points (A and B) of a bridge-type impedance network (12); the input node (P1) of the bridge-type impedance network (12) is connected with the positive electrode of an input side power converter (11); the output node (P2) is connected with the positive electrode of an output side power converter (22); and the negative electrode of the input side power converter (11) is connected with the negative electrode of the output side power converter (22). A load (20) is connected with the middle point of a bridge arm of the output side power converter (22); and a power supply (10) is connected with the middle point of the bridge arm of the input side power converter (11). Different conversion aims can be realized by controlling the topology structure of a bridge through the two-way switch (33).
Description
Technical field
The present invention relates to a kind of series-connected bridge-type impedance network power converter, particularly a kind of series-connected bridge-type impedance network power converter that comprises connected electric bridge type impedance network circuit.
Background technology
All need to carry out the power converter processing such as AC-DC-AC in fields such as motor driving, generation of electricity by new energy and electric automobiles, conventional power converter technology has: AC-DC commutation technique and DC-AC inversion transformation technique.Traditional power conversion system adopts diode not control rectification at AC-DC conversion stage, can give electrical network harmonic, affects the quality of power supply, and energy can only one-way flow, flows to load-side from mains side.In order to realize green energy conversion, to reduce electric network pollution and improve efficiency, it is imperative to have High Power Factor and can realize the power conversion system of two-way flow of energy.This transformation system adopts high frequency controlled rectification and the controlled inversion transformation technique of high frequency, as shown in Figure 1.
In said system, rectification stage and inverse cascade all adopt high frequency gate-controlled switch device to realize, and have symmetry or duality on circuit structure, can equivalent analysis.Sum up, the AC-DC or the DC-AC transformation topology structure that exist at present are mainly divided into two classes, voltage source converter and current-source convertor.
Fig. 2 is typical voltage source converter, and this circuit is by three phase mains and inductance, and three-phase power converters and DC capacitor form, and wherein power inverter forms three-phase H bridge construction by 6 power switchs with anti-paralleled diode.Conventional voltage code converter AC-DC possesses BOOST circuit characteristic when rectification, and output voltage is raise, and therefore brings following shortcoming: improved the voltage of DC bus, increased the switch stress of power device.This circuit can only boost, can not step-down, in the occasion to charge in batteries, need to regulate in a big way its charging voltage, this translation circuit output voltage range is narrow, difficulty meets the demands.The conducting simultaneously of two switching tubes of same brachium pontis, no person's brachium pontis meeting shoot through, damages switching tube; And the EMI of electric power system disturbs or noise likely makes brachium pontis false triggering, thereby reduce the reliability of system.
Fig. 3 is typical current-source convertor, and this circuit is by three phase mains, three pole reactor and electric capacity, and three-phase power converters and DC inductance form, and wherein power inverter forms three-phase H bridge construction by 6 power switchs with series diode.When conventional current code converter AC-DC rectification, possesses BUCK circuit characteristic, output voltage is reduced, therefore bring following shortcoming: this circuit can only step-down, can not boost, in the occasion to charge in batteries, need to regulate in a big way its charging voltage, this translation circuit output voltage range is narrow, and difficulty meets the demands.Two switching tubes of same brachium pontis can not disconnect simultaneously, and no person's brachium pontis can lead directly to open circuit, and inductance open circuit too high voltages is damaged switching tube; And the EMI of electric power system disturbs or noise likely makes brachium pontis false triggering, thereby reduce the reliability of system.
In a word, there is following common deficiency in traditional voltage source converter and current source converter: they can only be booster type or voltage-dropping type current transformer, and can not be the lifting/lowering die mould current transformers that has lifting/lowering die mould function concurrently, cause its output voltage range limited.Its main circuit of voltage source converter and current source converter can not exchange use, brings much inconvenience to power electronic system designer.The anti-electromagnetic interference capability of system a little less than.
U.S. Peng professor F.Z has proposed the Z-source inventer between voltage source and current source, claims again Z-source inverter, as Fig. 4.This circuit is made up of DC power supply, diode, inductance capacitance impedance network, three-phase power converters and AC load.Wherein impedance network is made up of the connection of Z-shaped two groups of equal inductance L 1, L2 and capacitor C 1, C2 of numerical value, and power inverter forms three-phase H bridge construction by 6 power switchs with anti-paralleled diode.Owing to adopting unique impedance type network, Z-source inverter can work in normal inverter mode and pass-through state.When bridge arm direct pass state, impedance network energy storage, thus promote DC voltage, regulate inverter output voltage, possess BOOST circuit characteristic.Normal inverter mode, similar conventional inverter, possesses BUCK circuit characteristic.Z-source inverter is a kind of new Power Electronic Circuit topology, and single-stage conversion is efficient; Possess BOOST and BUCK circuit characteristic simultaneously, can boost and step-down, allow input voltage wide variation; Ride-through capability while providing voltage to fall, reduces surge and harmonic current; Be not afraid of straight-through fault.
Can find the Analysis of Topological Structure of existing source of resistance current transformer, source of resistance network essence can be equivalent to a two-port network, this two-port network between power supply and load, be connected in parallel and positive and negative busbar between.Because being is connected in parallel, the ceiling voltage that source of resistance network bears must be the maximum of input side supply voltage and inverter DC bus-bar voltage, and therefore the electric stress of passive device capacitor and inductor is larger.Integrate, existing Z-source inverter also comes with some shortcomings, 1) source of resistance current transformer components and parts electric stress is higher, and passive impedance network is larger; 2) source of resistance network using Z-type connects, its complex structure, power busbar design comparison difficulty; 3) the appearance vibration out of control, easy of Z-source inverter system output voltage in the time of underload and low power factor is even unstable, dwindle system applies scope, increase system control complexity, 4), in power transmission system, Z-source inverter is difficult for realizing smoothly energy feedback four quadrant running; 5) Z-source inverter moves in PWM hard switching mode, has increased system electromagnetic disturbance, has increased switching loss, and switch frequency is difficult to improve with less converter volume and weight.These have hindered applying of Z-source inverter above.
In order further to improve the efficiency of converters, improve switch frequency, improve system EMC, except PWM hard switching technology is widely used in engineering field, the soft switch technique research that PWM and harmonic technology combine also makes great progress, and resonant converter is widely applied.According to the resonance manner of resonant cavity element, be divided into series resonance code converter and parallel resonance code converter two classes.By the connected mode of load and resonant circuit, be divided into series load resonant code converter and shunt load resonant converter that load is connected with resonant tank.According to the connected mode of resonant element and power switch, there are no-voltage/Zero Current Switch quasi-resonance and multi-resonance converter.Power inverter adopts PWM modulation control mode, has again no-voltage/Zero Current Switch/conversion pwm converter (ZVS/ZVT, ZCS/ZCT pwm converter).Soft switch power converter is the major progress of field of power electronics, has good development and application prospect.
Fig. 5 is series resonant converter, and this circuit is made up of three phase mains and inductance, three-phase power converters, inductance, electric capacity and ohmic load, and wherein power inverter forms three-phase H bridge construction by 6 power switchs.In this circuit, inductance and capacitances in series connect and compose resonant slots to realize series resonance, and power switch is opened or turn-offed in the time of resonance potential current over-zero, to realize the effect of soft switch.
Fig. 6 is parallel resonance converter, and this circuit is by three phase mains, three pole reactor and electric capacity, three-phase power converters, and inductance, electric capacity and ohmic load form, and wherein power inverter forms three-phase H bridge construction by 6 power switchs.In this circuit, inductance and Capacitance parallel connection connect and compose resonant slots to realize parallel resonance, and power switch is opened or turn-offed in the time of resonance potential current over-zero, to realize the effect of soft switch.
Summary of the invention
The object of the invention is to overcome existing power inverter and can not have liter or voltage-dropping type function simultaneously concurrently, can not realize the shortcoming of soft switch operation simultaneously, a kind of Novel electric bridge type impedance network circuit is proposed, and a kind of power inverter that comprises described connected electric bridge type impedance network.Series-connected bridge-type impedance network power converter of the present invention has the function of liter or step-down concurrently simultaneously, can realize the operation of energy feedback bidirectional power flow, its power switch has soft switch running environment, thereby improves power converter system conversion efficiency, reduces volume and weight simultaneously, improves reliability.
Connected electric bridge type impedance network circuit of the present invention is connected in series and is formed by the first inductance, the first electric capacity, the second inductance and the second electric capacity order head and the tail, this connected electric bridge type impedance network circuit has four points of connection, bidirectional switch diagonal angle is connected in two tie points of described connected electric bridge type impedance network circuit, forms connected electric bridge type impedance network circuit.Two other tie point of described connected electric bridge type impedance network circuit is respectively input node and output node.
Described bidirectional switch comprises the first switch and second switch, and the first switch and second switch are electric and electronic power switch.The composition form of described bidirectional switch is any one in following three kinds: described the first switch and second switch are reverse blocking IGBT switching device (RB-IGBT), and two switch reverse parallel connections composition; Or described the first switch and second switch are the IGBT switching device with fly-wheel diode, and two switch differential concatenations composition, wherein the collector electrode of two IGBT switches is interconnected; Or described the first switch and second switch are the IGBT switching device with fly-wheel diode, and two switch differential concatenations composition, wherein the emitter of two IGBT switches is interconnected.
Series-connected bridge-type impedance network power converter of the present invention is made up of power supply, input side power inverter, connected electric bridge type impedance network circuit, outlet side power inverter and load.Described input side power inverter and outlet side power inverter adopt voltage source converter or current type converter, and the number of phases of converter can be single-phase, two-phase, three-phase or heterogeneous.The number of phases of power supply is identical with the number of phases of input side power inverter, and the number of phases of load is identical with the number of phases of outlet side power inverter.Described power supply is connected in the brachium pontis mid point of input side power inverter, the positive pole of input side power inverter is connected with the input node of connected electric bridge type impedance network circuit, the output node of connected electric bridge type impedance network circuit is connected with the positive pole of outlet side power inverter, the negative pole of input side power inverter is connected with the negative pole of outlet side power inverter, and load is connected in the brachium pontis mid point of outlet side power inverter.
Traditional electric bridge adopts 4 resistance to be configured to passive network, the connected electric bridge type impedance network circuit that the present invention proposes adopts inductance capacitance and power switch to form active network, conducting by bidirectional switch and/or shutoff are free to control the topological structure of electric bridge, realize the different working modes of power inverter.
Described series-connected bridge-type impedance network power converter has following 4 kinds of mode of operations according to the state difference of bidirectional switch:
Mode of operation 1: series resonant converter operating state
When the first switch of the bidirectional switch of described connected electric bridge type impedance network turn-offs, and the second switch of bidirectional switch turn-offs, described two tie points of connected electric bridge type impedance network disconnect, the first inductance in connected electric bridge type impedance network and the second capacitances in series, the second inductance and the first capacitances in series, two-way series arm is connected in parallel by input node and the output node of described impedance network again.Connected electric bridge type impedance network is realized series resonance, busbar voltage or electric current can resonance zero passages, the power switch of described power inverter operates in no-voltage or Zero Current Switch mode, and described series-connected bridge-type impedance network power converter operates in series resonant converter operating state.
Mode of operation 2: parallel resonance converter operating state
When the first switch conduction of the bidirectional switch of described connected electric bridge type impedance network, and the second switch conducting of bidirectional switch, two tie points of described connected electric bridge type impedance network overlap, the first inductance and the first Capacitance parallel connection in described connected electric bridge type impedance network, the second inductance and the second Capacitance parallel connection, two-way parallel branch is connected in series in input node and the output node of described impedance network successively.Described connected electric bridge type impedance network is realized parallel resonance, busbar voltage or electric current can resonance zero passages, the power switch of described power inverter operates in no-voltage or Zero Current Switch mode, and described series-connected bridge-type impedance network power converter operates in parallel resonance converter operating state.
Mode of operation 3: bidirectional power flow rises or buck convertor operating state
When the first switch switch motion of the bidirectional switch of described connected electric bridge type impedance network, and the second switch switch motion of bidirectional switch, two tie points of described connected electric bridge type impedance network are along with the intermittently closed or disconnection of action of bidirectional switch, due to two equal switch conductions of switch of described bidirectional switch, electric current can two-way flow.Described series-connected bridge-type impedance network power converter works in normal rectification or inverter mode and pass-through state.Taking outlet side power inverter as example, when any one brachium pontis of outlet side power inverter is during in pass-through state, described connected electric bridge type impedance network circuit energy storage, thereby promote the direct voltage of outlet side power inverter, regulate described series-connected bridge-type impedance network power converter output voltage, possess booster circuit characteristic.When outlet side power inverter is in normal inverter mode, similar conventional inverter, described series-connected bridge-type impedance network power converter possesses reduction voltage circuit characteristic.Series-connected bridge-type impedance network power converter operates in bidirectional power flow and rises or buck convertor operating state.Adopt PWM commutation technique can realize unity power factor conversion in grid side, to electrical network no-harmonic wave pollution.
Mode of operation 4: unidirectional power stream rises or buck convertor operating state
When the first switch switch motion in the bidirectional switch of described connected electric bridge type impedance network, and the second switch of bidirectional switch turn-offs or the first switch of bidirectional switch turn-offs and the second switch switch motion of bidirectional switch, two tie points of connected electric bridge type impedance network are along with the intermittently closed or disconnection of action of bidirectional switch, due to a switch switch conduction only in described bidirectional switch, electric current can only one-way flow.Series-connected bridge-type impedance network power converter operates in unidirectional power stream and rises or buck convertor operating state.
From circuit structural analysis, connected electric bridge type impedance network of the present invention is " port " network, and between series connection access input side power inverter and outlet side power inverter, its negative busbar interconnects.Because being is connected in series, the ceiling voltage that connected electric bridge type impedance network bears is the difference between input side direct voltage and outlet side direct voltage, and therefore the electric stress of passive device capacitor and inductor reduces greatly.Circuit analysis shows, electrical bridge type impedance network power converter reduces the electric stress of passive device in circuit, thereby reduces the volume and weight of passive network; Without absorbing clamp circuit, reduce components and parts number; Input side and outlet side power inverter altogether, have been simplified the design of system configuration and power busbar, have improved system input performance.
Compared with prior art, its technical characteristics is in the present invention: series-connected bridge-type impedance network power converter is very flexible, can make power inverter operate in 4 kinds of operating states by the action of bidirectional switch.Can operate in serial or parallel connection resonance condition, realize soft switch operation, improve system changeover efficiency, improve power inverter electromagnetic environment.Have concurrently and boost and buck functionality, can adapt to the application scenario that input and output voltage excursion is large.Can realize the to and fro flow of power between power supply and load, improve system changeover efficiency.Can realize unity power factor conversion, to electrical network no-harmonic wave pollution.Reduce the electric stress of passive device in impedance network circuit, thereby reduce the volume and weight of passive network; Simplify the design of system configuration and power busbar, improved system input performance, expanded the scope of application of power conversion circuit system.
Brief description of the drawings
Rectification-the inversion system back-to-back of Fig. 1 prior art;
The voltage source converter system of Fig. 2 prior art;
The current-source convertor system of Fig. 3 prior art;
The Z-source inverter system of Fig. 4 prior art;
The series resonant converter of Fig. 5 prior art;
The parallel resonance converter of Fig. 6 prior art;
The schematic diagram of Fig. 7 connected electric bridge type impedance network circuit of the present invention;
Fig. 8 series-connected bridge-type impedance network power converter structural representation of the present invention;
Fig. 9 series-connected bridge-type impedance network three-phase of the present invention AC-AC transformer configuration schematic diagram;
The single-phase AC-AC transformer configuration of Figure 10 series-connected bridge-type impedance network of the present invention schematic diagram;
Figure 11 bi-directional electric power electronic power switch structural representation.
Embodiment
Fig. 7 is the schematic diagram of connected electric bridge type impedance network circuit of the present invention.As shown in Figure 7, described connected electric bridge type impedance network circuit is connected in series and is formed impedance network by the first inductance L 1, the first capacitor C 1, the second inductance L 2 and the second capacitor C 2 order head and the tail, this network has four points of connection: A, P1, B, P2, bidirectional switch 33 diagonal angles are connected in two tie point A, B of described impedance network, form connected electric bridge type impedance network circuit.Two other tie point P1, the P2 of described connected electric bridge type impedance network circuit is input node and output node, and wherein P1 is input node, and P2 is output node.
Fig. 8 is series-connected bridge-type impedance network power converter structural representation.As shown in Figure 8, series-connected bridge-type impedance network power converter is made up of power supply 10, input side power inverter 11, connected electric bridge type impedance network circuit 12, outlet side power inverter 22 and load 20.Described input side power inverter 11 and outlet side power inverter 22 adopt voltage source converter or current type converter, and the number of phases of converter can be single-phase, two-phase, three-phase or heterogeneous.The number of phases of power supply 10 is identical with input side power inverter 11, and the number of phases of load 20 is identical with outlet side power inverter 22.Described power supply 10 is connected in the brachium pontis mid point of input side power inverter 11, the positive pole of input side power inverter 11 is connected with the input node of connected electric bridge type impedance network circuit 12, the output node of connected electric bridge type impedance network circuit 12 is connected with the positive pole of outlet side power inverter 22, the negative pole of input side power inverter 11 is connected with the negative pole of outlet side power inverter 22, and load is connected in the brachium pontis mid point of outlet side power inverter 22.
Fig. 9 is series-connected bridge-type impedance network three-phase AC-AC converter circuit, is interconnected and is formed by three phase mains 103, input side power inverter 113, connected electric bridge type impedance network circuit 12, outlet side power inverter 223, motor load 203.Wherein, input power 103 is in series by three phase network and inductance; Input side power inverter 113 is three-phase VSC, form three-phase H bridge construction by 6 power switch S1, S2, S3, S4, S5 and S6 with anti-paralleled diode, wherein S1, S3, S5 are connected on respectively the positive pole of three-phase brachium pontis, and S4, S6, S2 are connected on respectively the negative pole of corresponding three-phase brachium pontis.Wherein S1 and S4 are connected in series, and S3 and S6 are connected in series, and S5 and S2 are connected in series.Connected electric bridge type impedance network circuit 12 is connected in series and is formed by the first inductance L 1, the first capacitor C 1, the second inductance L 2 and the second capacitor C 2 head and the tail, this connected electric bridge type impedance network circuit has four points of connection A, P1, B, P2,33 jiaos of bidirectional switchs are connected in two tie points of A, B of connected electric bridge type impedance network circuit, thereby form connected electric bridge type impedance network circuit, P1,2 of P2 are Inport And Outport Node, wherein P1 is input node, and P2 is output node.Connected electric bridge type impedance network circuit 12 is connected in series between the positive pole of input side power inverter 113 and the positive pole of outlet side power inverter 223, and the negative pole of input side power inverter 113 is connected with the negative pole of outlet side power inverter 223.Outlet side power inverter 223 is three-phase VSC, form three-phase H bridge construction by 6 power switch S7, S8, S9, S10, S11 and S12 with anti-paralleled diode, wherein S7, S9, S11 are connected on respectively the positive pole of three-phase brachium pontis, S10, S12, S8 are connected on respectively the negative pole of corresponding three-phase brachium pontis, wherein S7 and S10 are connected in series, S9 and S12 are connected in series, and S11 and S8 are connected in series.Load 20 is three phase alternating current motor.
Series-connected bridge-type impedance network three-phase AC-AC converter circuit can have following 4 kinds of mode of operations according to the state difference of bidirectional switch:
1) mode of operation 1: series resonant converter operating state is: when the first switch S A in bidirectional switch 33 turn-offs, and the second switch SB of bidirectional switch turn-offs, two tie point A of connected electric bridge type impedance network circuit, 2 disconnections of B, in connected electric bridge type impedance network circuit, the first inductance L 1 is connected with the second capacitor C 2, the second inductance L 2 is connected with the first capacitor C 1, and above-mentioned two-way series arm is connected in parallel by input node P1 and the output node P2 point of connected electric bridge type impedance network again.Connected electric bridge type impedance network is realized series resonance, and busbar voltage or electric current can resonance zero passages, and the power switch of described input side and outlet side power inverter operates in no-voltage or Zero Current Switch mode.
2) mode of operation 2: parallel resonance converter operating state is: when the first switch S A conducting in bidirectional switch 33, and the second switch SB conducting of bidirectional switch, two tie point A, B of connected electric bridge type impedance network circuit overlap, in connected electric bridge type impedance network circuit, the first inductance L 1 is in parallel with the first capacitor C 1, the second inductance L 2 is in parallel with the second capacitor C 2, and above-mentioned two-way parallel branch is connected in series in input node P1 and output node P2 more successively.Connected electric bridge type impedance network circuit is realized parallel resonance, and busbar voltage or electric current can resonance zero passages, and the power switch of input side and outlet side power inverter operates in no-voltage or Zero Current Switch mode.
3) mode of operation 3: bidirectional power flow rises or buck convertor operating state is: when the first switch S A switch motion of bidirectional switch 33, and the second switch SB switch motion of bidirectional switch, two tie point A, B of connected electric bridge type impedance network circuit are along with the intermittently closed or disconnection of action of described bidirectional switch, due to two equal switch conductions of switch of described bidirectional switch, electric current can two-way flow.Series-connected bridge-type impedance network power converter can work in normal rectification or inverter mode and pass-through state.Adopt PWM commutation technique can realize unity power factor conversion in grid side, to electrical network no-harmonic wave pollution.
4) mode of operation 4: unidirectional power stream rises or buck convertor operating state: when the first switch S A switch motion of bidirectional switch 33, and the second switch SB of bidirectional switch turn-offs or the first switch S A of bidirectional switch 33 turn-offs, and the second switch SB switch motion of bidirectional switch, the A of connected electric bridge type impedance network, two tie points of B are along with the action of bidirectional switch is intermittently closed or disconnect, due to a switch switch conduction only in described bidirectional switch, electric current can only one-way flow.Series-connected bridge-type impedance network power converter operates in unidirectional power stream and rises or buck convertor operating state.
Figure 10 is the single-phase AC-AC converter circuit of series-connected bridge-type impedance network.Interconnect and form by single phase poaer supply 101, input side power inverter 111, connected electric bridge type impedance network circuit 12, outlet side power inverter 221, monophase machine load 201.Wherein, input power 101 is in series by single-phase electrical network and inductance; Input side power inverter 111 is single-phase voltage code converter, form half-bridge structure by 2 power switch S1, S2 with anti-paralleled diode and two capacitor C 101, C201, S1 and S2 series connection, C101, C201 series connection, wherein S1, C101 are connected on respectively the positive pole of brachium pontis, and S2, C201 are connected on respectively the negative pole of corresponding brachium pontis.Connected electric bridge type impedance network 12 is connected in series and is formed impedance network by the first inductance L 1, the first capacitor C 1, the second inductance L 2 and the second capacitor C 2 head and the tail, this network has four points of connection A, P1, B, P2, bidirectional switch 33 diagonal angles are connected in two tie points of A, B of impedance network, thereby form connected electric bridge type impedance network circuit, P1, two tie points of P2 are Inport And Outport Node, wherein P1 is input node, and P2 is output node.Connected electric bridge type impedance network 12 is connected in series between the positive pole of input side power inverter 111 and the positive pole of outlet side power inverter 221, and the negative pole of input side power inverter 111 is connected with the negative pole of outlet side power inverter 221.Outlet side power inverter 221 is single-phase voltage code converter, form half-bridge structure by 2 power switch S7, S8 with anti-paralleled diode and two capacitor C 701, C801, S7 and S8 series connection, C701, C801 series connection, wherein S7, C701 are connected on respectively the positive pole of brachium pontis, and S8, C801 are connected on respectively the negative pole of corresponding brachium pontis.Load 201 is one-way communication motor.The single-phase AC-AC converter circuit of connected electric bridge type impedance network can have 4 kinds of mode of operations according to the state difference of bidirectional switch, the similar three-phase AC-AC of its circuit operation characteristic converter circuit.
Figure 11 a, b, c are the structural representation of bidirectional switch 33.As shown in figure 11, described bidirectional switch 33 comprises the first switch S A and second switch SB, and the first switch S A and second switch SB are electric and electronic power switch.The composition form of described bidirectional switch 33 is any one in following three kinds of versions: (1) described first switch S A and second switch SB are reverse blocking IGBT switching device (RB-IGBT), and two switch reverse parallel connections composition; (2) or described the first switch S A and second switch SB be the IGBT switching device with fly-wheel diode, and two switch differential concatenations composition, wherein the collector electrode of two IGBT switches is interconnected; (3) or described the first switch S A and second switch SB be the IGBT switching device with fly-wheel diode, and two switch differential concatenations composition, wherein the emitter of two IGBT switches is interconnected.
Claims (8)
1. a series-connected bridge-type impedance network power converter, is characterized in that described series-connected bridge-type impedance network power converter comprises connected electric bridge type impedance network circuit (12);
Described connected electric bridge type impedance network circuit (12) is connected in series and is formed by the first inductance (L1), the first electric capacity (C1), the second inductance (L2) and the second electric capacity (C2) order head and the tail, described connected electric bridge type impedance network circuit (12) has four points of connection (A, P1, B, P2), and bidirectional switch (33) diagonal angle is connected in two tie points (A, B) of described connected electric bridge type impedance network circuit; Two other tie point (P1, P2) of described connected electric bridge type impedance network circuit is respectively input node (P1) and output node (P2); Described bidirectional switch (33) comprises the first switch (SA) and second switch (SB), and described the first switch (SA) and second switch (SB) are electric and electronic power switch;
The input node (P1) of connected electric bridge type impedance network circuit (12) is connected with the positive pole of input side power inverter (11), the output node (P2) of described connected electric bridge type impedance network circuit (12) is connected with the positive pole of outlet side power inverter (22), the negative pole of described input side power inverter (11) is connected with the negative pole of outlet side power inverter (22), and load (20) is connected in the brachium pontis mid point of outlet side power inverter (22); Power supply (10) is connected in the brachium pontis mid point of input side power inverter (11), forms series-connected bridge-type impedance network power converter.
2. a series-connected bridge-type impedance network power converter, is characterized in that described series-connected bridge-type impedance network power converter comprises connected electric bridge type impedance network circuit (12);
Described connected electric bridge type impedance network circuit (12) is connected in series and is formed by the first inductance (L1), the first electric capacity (C1), the second inductance (L2) and the second electric capacity (C2) order head and the tail, described connected electric bridge type impedance network circuit (12) has four points of connection (A, P1, B, P2), and bidirectional switch (33) diagonal angle is connected in two tie points (A, B) of described connected electric bridge type impedance network circuit; Two other tie point (P1, P2) of described connected electric bridge type impedance network circuit is respectively input node (P1) and output node (P2); Described bidirectional switch (33) comprises the first switch (SA) and second switch (SB), and described the first switch (SA) and second switch (SB) are electric and electronic power switch; The composition form of described bidirectional switch (33) is any one in following three kinds: described the first switch (SA) and second switch (SB) are reverse blocking IGBT switching device, and described the first switch (SA) and second switch (SB) reverse parallel connection composition; Or described the first switch (SA) and second switch (SB) are the IGBT switching device with fly-wheel diode, and described the first switch (SA) and second switch (SB) differential concatenation composition, the collector electrode of described the first switch (SA) and second switch (SB) is interconnected; Or described the first switch (SA) and second switch (SB) are the IGBT switching device with fly-wheel diode, and described the first switch (SA) and second switch (SB) differential concatenation composition, the emitter of described the first switch (SA) and second switch (SB) is interconnected;
The input node (P1) of connected electric bridge type impedance network circuit (12) is connected with the positive pole of input side power inverter (11), the output node (P2) of described connected electric bridge type impedance network circuit (12) is connected with the positive pole of outlet side power inverter (22), the negative pole of described input side power inverter (11) is connected with the negative pole of outlet side power inverter (22), and load (20) is connected in the brachium pontis mid point of outlet side power inverter (22); Power supply (10) is connected in the brachium pontis mid point of input side power inverter (11), forms series-connected bridge-type impedance network power converter.
3. series-connected bridge-type impedance network power converter as claimed in claim 1 or 2, is characterized in that described input side power inverter (11) and the number of phases of outlet side power inverter (22) are single-phase or heterogeneous.
4. series-connected bridge-type impedance network power converter as claimed in claim 1 or 2, is characterized in that described input side power inverter (11) is voltage source converter or current type converter; Described outlet side power inverter (22) is voltage source converter or current type converter.
5. series-connected bridge-type impedance network power converter as claimed in claim 1 or 2, it is characterized in that in described power inverter, when the first switch (SA) shutoff of bidirectional switch and second switch (SB) shutoff of bidirectional switch, described power inverter operates in series resonant converter operating state; When the first switch (SA) conducting of bidirectional switch, and the second switch of bidirectional switch (SB) conducting, described power inverter operates in parallel resonance converter operating state; When the first switch (SA) switch motion of bidirectional switch, and the second switch of bidirectional switch (SB) switch motion, described power inverter operates in bidirectional power flow and rises or buck convertor operating state; When the first switch (SA) switch motion of bidirectional switch and the shutoff of the second switch (SB) of bidirectional switch, or when the first switch (SA) shutoff of bidirectional switch and second switch (SB) switch motion of bidirectional switch, described power inverter operates in unidirectional power stream and rises or buck convertor operating state.
6. series-connected bridge-type impedance network power converter as claimed in claim 3, it is characterized in that in described power inverter, when the first switch (SA) shutoff of bidirectional switch and second switch (SB) shutoff of bidirectional switch, described power inverter operates in series resonant converter operating state; When the first switch (SA) conducting of bidirectional switch, and the second switch of bidirectional switch (SB) conducting, described power inverter operates in parallel resonance converter operating state; When the first switch (SA) switch motion of bidirectional switch, and the second switch of bidirectional switch (SB) switch motion, described power inverter operates in bidirectional power flow and rises or buck convertor operating state; When the first switch (SA) switch motion of bidirectional switch and the shutoff of the second switch (SB) of bidirectional switch, or when the first switch (SA) shutoff of bidirectional switch and second switch (SB) switch motion of bidirectional switch, described power inverter operates in unidirectional power stream and rises or buck convertor operating state.
7. series-connected bridge-type impedance network power converter as claimed in claim 4, it is characterized in that in described power inverter, when the first switch (SA) shutoff of bidirectional switch and second switch (SB) shutoff of bidirectional switch, described power inverter operates in series resonant converter operating state; When the first switch (SA) conducting of bidirectional switch, and the second switch of bidirectional switch (SB) conducting, described power inverter operates in parallel resonance converter operating state; When the first switch (SA) switch motion of bidirectional switch, and the second switch of bidirectional switch (SB) switch motion, described power inverter operates in bidirectional power flow and rises or buck convertor operating state; When the first switch (SA) switch motion of bidirectional switch and the shutoff of the second switch (SB) of bidirectional switch, or when the first switch (SA) shutoff of bidirectional switch and second switch (SB) switch motion of bidirectional switch, described power inverter operates in unidirectional power stream and rises or buck convertor operating state.
8. the control method of the series-connected bridge-type impedance network power converter as described in any one in claim 1-4, described power inverter by the first switch (SA) in described bidirectional switch (33), second switch (SB) conducting or turn-off can free control circuit topological structure, realize the different working modes of power inverter: when the first switch (SA) shutoff of bidirectional switch and second switch (SB) shutoff of bidirectional switch, described power inverter operates in series resonant converter operating state; When the first switch (SA) conducting of bidirectional switch, and the second switch of bidirectional switch (SB) conducting, described power inverter operates in parallel resonance converter operating state; When the first switch (SA) switch motion of bidirectional switch, and the second switch of bidirectional switch (SB) switch motion, described power inverter operates in bidirectional power flow and rises or buck convertor operating state; When the first switch (SA) switch motion of described bidirectional switch and the shutoff of the second switch (SB) of bidirectional switch, or when the first switch (SA) shutoff of bidirectional switch and second switch (SB) switch motion of bidirectional switch, described power inverter operates in unidirectional power stream and rises or buck convertor operating state.
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| CN102158072B (en) * | 2011-04-07 | 2014-03-19 | 中国科学院电工研究所 | Power inverter of parallel-connected electric bridge type impedance network |
| CN103453766B (en) * | 2013-08-28 | 2015-03-25 | 淮北市平祥感应炉有限公司 | Parallel resonance single-unit furnace freely converting between two frequencies |
| CN104578881A (en) * | 2015-01-23 | 2015-04-29 | 北京理工大学 | Novel Z-source grid-connected inverter |
| DE102017214056B3 (en) * | 2017-08-11 | 2018-10-18 | Continental Automotive Gmbh | Driver circuit for a light-emitting diode arrangement and lighting device and motor vehicle |
| CN109462337B (en) * | 2018-12-29 | 2024-04-16 | 北京中科绿能科技有限公司 | High step-up ratio cascading bridge type impedance network DC/DC converter and control method |
| US20220140751A1 (en) * | 2019-03-11 | 2022-05-05 | The University Of Hong Kong | Ac-to-dc and dc-to-ac power conversion |
| CN111806267B (en) * | 2020-07-27 | 2022-09-06 | 哈尔滨工业大学 | Electric automobile traction-bidirectional charging system based on quadruple staggered parallel DC/DC |
| CN114475362A (en) * | 2021-12-02 | 2022-05-13 | 北京新能源汽车股份有限公司 | Electric vehicle and drive control system thereof |
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