CN102158071A - Series-connected bridge-type impedance network power converter - Google Patents
Series-connected bridge-type impedance network power converter Download PDFInfo
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- CN102158071A CN102158071A CN2011100859242A CN201110085924A CN102158071A CN 102158071 A CN102158071 A CN 102158071A CN 2011100859242 A CN2011100859242 A CN 2011100859242A CN 201110085924 A CN201110085924 A CN 201110085924A CN 102158071 A CN102158071 A CN 102158071A
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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 electrical bridge type impedance network power inverter, particularly a kind of series electrical bridge type impedance network power inverter that comprises bridge type impedance network circuit.
Background technology
All need to carry out power converter processing such as AC-DC-AC in fields such as motor-driven, generation of electricity by new energy and electric automobiles, power converter technology commonly used has: AC-DC commutation technique and DC-AC inversion transformation technique.Traditional power conversion system adopts diode not control rectification at the AC-DC conversion stage, can inject harmonic wave to electrical network, influences the quality of power supply, and energy can only one-way flow, flows to load-side from mains side.In order to realize the green energy conversion, reduce electric network pollution and to improve utilization of power efficient, have High Power Factor and can realize that the power conversion system of two-way flow of energy is imperative.This transformation system adopts high frequency controlled rectification and the controlled inversion transformation technique of high frequency, as shown in Figure 1.
Rectification stage and inverse cascade all adopt high frequency gate-controlled switch device to realize having symmetry or duality on circuit structure in said system, can equivalent analysis.Summary is got up, and AC-DC or the DC-AC transformation topology structure that exists mainly is divided into two classes, voltage source converter and current-source convertor at present.
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 constitute, and wherein power inverter is formed three-phase H bridge construction by 6 power switchs that have the inverse parallel diode.Conventional voltage code converter AC-DC possesses the BOOST circuit characteristic during rectification, makes output voltage 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 occasion, need regulate its charging voltage in a big way to charge in batteries, this translation circuit output voltage range is narrow, difficulty meets the demands.The conducting simultaneously of two switching tubes of same brachium pontis, person's brachium pontis meeting shoot through does not damage switching tube; And the EMI of electric power system disturbs or noise might make the brachium pontis false triggering, thereby has reduced the reliability of system.
Fig. 3 is the typical current source converter, and this circuit is by three phase mains, three pole reactor and electric capacity, and three-phase power converters and dc inductance constitute, and wherein power inverter is formed three-phase H bridge construction by 6 power switchs that have series diode.Possesses the BUCK circuit characteristic during conventional current code converter AC-DC rectification, make output voltage reduce, therefore bring following shortcoming: this circuit can only step-down, can not boost, in occasion to charge in batteries, need regulate its charging voltage in a big way, 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 person's brachium pontis can not lead directly to open circuit, and promptly inductance open circuit too high voltages is damaged switching tube; And the EMI of electric power system disturbs or noise might make the brachium pontis false triggering, thereby has reduced the reliability of system.
In a word, there are 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 many inconvenience for the 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 Z-source inverter again, as Fig. 4.This circuit is made of DC power supply, diode, inductance capacitance impedance network, three-phase power converters and AC load.Wherein impedance network is formed being connected of Z font by inductance L 1, L2 and capacitor C 1, the C2 that two groups of numerical value equate, power inverter is formed three-phase H bridge construction by 6 power switchs that have the inverse parallel diode.Because adopt unique impedance type network, Z-source inverter can work in normal inverter mode and pass-through state.During the bridge arm direct pass state, the impedance network energy storage, thus promote dc voltage, regulate inverter output voltage, possess the BOOST circuit characteristic.Normal inverter mode, similar conventional inverter possesses the BUCK circuit characteristic.Z-source inverter is a kind of new Power Electronic Circuit topology, and the single-stage conversion is efficient; Possess BOOST and BUCK circuit characteristic simultaneously, can boost and step-down, allow the input voltage wide variation; Ride-through capability when electric voltage dropping is provided reduces surge and harmonic current; Be not afraid of straight-through fault.
Analysis of Topological Structure to existing source of resistance current transformer can find that source of resistance network essence can equivalence be a two-port network, this two-port network between power supply and load, be connected in parallel and positive and negative busbar between.Owing to be to be connected in parallel, the ceiling voltage that the source of resistance network bears must be the maximum of input side supply voltage and inverter DC bus-bar voltage, so the electric stress of passive device capacitor and inductor is bigger.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 bigger; 2) source of resistance network using Z type connects, its complex structure, and the design of power busbar is difficulty relatively; 3) the appearance vibration out of control, easy of Z-source inverter system's output voltage when underload and low power factor is even unstable, dwindled the system applies scope, increased system's 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's electromagnetic disturbance, has increased switching loss, and the switch operating frequency is difficult to improve with less converter volume and weight.More than these have hindered applying of Z-source inverter.
In order further to improve the efficient of converters, improve the switch operating frequency, improvement system Electro Magnetic Compatibility, except PWM hard switching technology is widely used in the engineering field, the soft switch technique research that PWM and harmonic technology combine has also obtained very big progress, and resonant converter obtains widely applying.According to the resonance manner of resonant cavity element, be divided into series resonance code converter and parallel resonance code converter two classes.Connected mode by load and resonant circuit is divided into series load resonant converter and shunt load resonant converter that load is connected with resonant tank.According to the connected mode of resonant element and power switch, no-voltage/Zero Current Switch quasi-resonance and multi-resonance converter arranged.Power inverter adopts PWM modulation control mode, and no-voltage/Zero Current Switch/conversion pwm converter (ZVS/ZVT, ZCS/ZCT pwm converter) is arranged again.The soft switch power converter is the major progress of field of power electronics, has good development and application prospect.
Fig. 5 is a series resonant converter, and this circuit is made of three phase mains and inductance, three-phase power converters, inductance, electric capacity and ohmic load, and wherein power inverter is formed 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 when the resonance potential current over-zero, to realize the effect of soft switch.
Fig. 6 is the 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 constitute, and wherein power inverter is formed three-phase H bridge construction by 6 power switchs.In this circuit, inductance and electric capacity are connected in parallel and constitute resonant slots to realize parallel resonance, and power switch is opened or turn-offed when the resonance potential current over-zero, to realize the effect of soft switch.
Summary of the invention
The objective 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 measuring bridge type impedance network circuit is proposed, and a kind of power inverter that comprises described bridge type impedance network.Series electrical bridge type impedance network power inverter of the present invention has the function of liter or step-down simultaneously concurrently, can realize the operation of energy feedback bidirectional power flow, its power switch has soft switch running environment, thus improve the power converter system conversion efficiency, simultaneously reduce volume and weight, improve reliability.
Bridge type impedance network circuit of the present invention is connected in series by first inductance, first electric capacity, second inductance and second electric capacity order head and the tail and forms, this bridge type impedance network circuit has four points of connection, the bidirectional switch diagonal angle is connected in two tie points of described bridge type impedance network circuit, constitutes bridge type impedance network circuit.Two other tie point of described bridge type impedance network circuit is respectively input node and output node.
Described bidirectional switch comprises first switch and second switch, and first switch and second switch are the electric and electronic power switch.The composition form of described bidirectional switch is any one in following three kinds: described first switch and second switch are inverse-impedance type IGBT switching device (RB-IGBT), and two switch reverse parallel connections are formed; Perhaps described first switch and second switch are the IGBT switching device of band fly-wheel diode, and two switch differential concatenations composition, and wherein the collector electrode of two IGBT switches is interconnected; Perhaps described first switch and second switch are the IGBT switching device of band fly-wheel diode, and two switch differential concatenations composition, and wherein the emitter of two IGBT switches is interconnected.
Series electrical bridge type impedance network power inverter of the present invention is made up of power supply, input side power inverter, 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 bridge type impedance network circuit, the output node of 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 constitute passive network, the bridge type impedance network circuit that the present invention proposes adopts inductance capacitance and power switch to constitute source network, the topological structure that conducting and/or shutoff by bidirectional switch is free to control electric bridge is realized the different working modes of power inverter.
Described series electrical bridge type impedance network power inverter 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 first switch of the bidirectional switch of described bridge type impedance network turn-offs, and the second switch of bidirectional switch turn-offs, two tie points of described bridge type impedance network disconnect, first inductance in the bridge type impedance network and second capacitances in series, second inductance and first capacitances in series, two-way series arm are connected in parallel by the input node and the output node of described impedance network again.The bridge type impedance network is realized series resonance, busbar voltage or electric current can the resonance zero passages, the power switch of described power inverter operates in no-voltage or Zero Current Switch mode, and described series electrical bridge type impedance network power inverter operates in the series resonant converter operating state.
Mode of operation 2: parallel resonance converter operating state
First switch conduction when the bidirectional switch of described bridge type impedance network, and the second switch conducting of bidirectional switch, two tie points of described bridge type impedance network overlap, first inductance is in parallel with first electric capacity in the described bridge type impedance network, second inductance is in parallel with second electric capacity, and the two-way parallel branch is connected in series in the input node and the output node of described impedance network successively.Described bridge type impedance network is realized parallel resonance, busbar voltage or electric current can the resonance zero passages, the power switch of described power inverter operates in no-voltage or Zero Current Switch mode, and described series electrical bridge type impedance network power inverter operates in parallel resonance converter operating state.
Mode of operation 3: bidirectional power flow rises or the buck convertor operating state
The first switch switch motion when the bidirectional switch of described bridge type impedance network, and the second switch switch motion of bidirectional switch, two tie points of described bridge type impedance network are intermittently closed or disconnection along with the action of bidirectional switch, because two equal switch conductions of switch of described bidirectional switch, electric current can two-way flow.Described series electrical bridge type impedance network power inverter works in normal rectification or inverter mode and pass-through state.With the outlet side power inverter is example, when any one brachium pontis of outlet side power inverter is in pass-through state, the energy storage of described bridge type impedance network circuit, thereby promote the direct voltage of outlet side power inverter, regulate described series electrical bridge type impedance network power inverter output voltage, possess the booster circuit characteristic.When the outlet side power inverter is in normal inverter mode, similar conventional inverter, described series electrical bridge type impedance network power inverter possesses the reduction voltage circuit characteristic.Series electrical bridge type impedance network power inverter operates in bidirectional power flow and rises or the buck convertor operating state.Adopt the PWM commutation technique can realize the unity power factor conversion in grid side, to the electrical network no-harmonic wave pollution.
Mode of operation 4: unidirectional power stream rises or the buck convertor operating state
The first switch switch motion in the bidirectional switch of described bridge type impedance network, and the second switch of bidirectional switch turn-offs or first switch of bidirectional switch turn-offs and the second switch switch motion of bidirectional switch, two tie points of bridge type impedance network are intermittently closed or disconnection along with the action of bidirectional switch, because switch switch conduction only in the described bidirectional switch, electric current can only one-way flow.Series electrical bridge type impedance network power inverter operates in unidirectional power stream and rises or the buck convertor operating state.
From circuit structural analysis as can be known, bridge type impedance network of the present invention is " port " network, and series connection inserts between input side power inverter and the outlet side power inverter, and its negative busbar interconnects.Owing to be to be connected in series, the ceiling voltage that the bridge type impedance network bears is the difference between input side direct voltage and the outlet side direct voltage, so the electric stress of passive device capacitor and inductor reduces greatly.Circuit analysis shows that bridge type impedance network power inverter reduces the electric stress of passive device in the circuit, thereby reduces the volume and weight of passive network; Need not the absorbing clamp circuit, reduce the components and parts number; Input side and outlet side power inverter have been simplified the design of system configuration and power busbar altogether, have improved system's input performance.
The present invention compared with prior art, its major technique characteristics are: series electrical bridge type impedance network power inverter is very flexible, can make power inverter operate in 4 kinds of operating states by the action of bidirectional switch.Can operate in the serial or parallel connection resonance condition, realize soft switch operation, improve system changeover efficient, improve the power inverter electromagnetic environment.Have concurrently and boost and buck functionality, can adapt to the big application scenario of input and output voltage excursion.Can realize that the power bi-directional between power supply and load flows, and improves system changeover efficient.Can realize the unity power factor conversion, to the electrical network no-harmonic wave pollution.Reduce the electric stress of passive device in the impedance network circuit, thereby reduce the volume and weight of passive network; Simplify the design of system configuration and power busbar, improved system's input performance, expanded the scope of application of power conversion circuit system.
Description of 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 bridge type impedance network of the present invention circuit;
Fig. 8 series electrical bridge type of the present invention impedance network power converter construction schematic diagram;
Fig. 9 series electrical bridge type of the present invention impedance network three-phase AC-AC transformer configuration schematic diagram;
The single-phase AC-AC transformer configuration of Figure 10 series electrical bridge type of the present invention impedance network schematic diagram;
Figure 11 bi-directional electric power electronic power switch structural representation.
Embodiment
Fig. 7 is the schematic diagram of bridge type impedance network circuit of the present invention.As shown in Figure 7, described bridge type impedance network circuit is connected in series by first inductance L 1, first capacitor C 1, second inductance L 2 and second capacitor C, 2 order head and the tail and forms impedance network, 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, constitute bridge type impedance network circuit.Two other tie point P1, the P2 of described bridge type impedance network circuit is input node and output node, and wherein P1 is the input node, and P2 is an output node.
Fig. 8 is a series electrical bridge type impedance network power converter construction schematic diagram.As shown in Figure 8, series electrical bridge type impedance network power inverter is made up of power supply 10, input side power inverter 11, 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 bridge type impedance network circuit 12, the output node of 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 a series electrical 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, bridge type impedance network circuit 12, outlet side power inverter 223, motor load 203.Wherein, input power supply 103 is connected with inductance by three phase network and is constituted; Input side power inverter 113 is the three-phase voltage code converter, form three-phase H bridge construction by 6 power switch S1, S2, S3, S4, S5 and S6 that have the inverse parallel diode, wherein S1, S3, S5 are connected on the positive pole of three-phase brachium pontis respectively, and S4, S6, S2 are connected on the negative pole of corresponding three-phase brachium pontis respectively.Wherein S1 and S4 are connected in series, and S3 and S6 are connected in series, and S5 and S2 are connected in series.Bridge type impedance network circuit 12 is connected in series by first inductance L 1, first capacitor C 1, second inductance L 2 and second capacitor C, 2 head and the tail and forms, this bridge type impedance network circuit has four points of connection A, P1, B, P2,33 jiaos of two tie points of A, B that are connected in bridge type impedance network circuit of bidirectional switch, thereby constitute bridge type impedance network circuit, 2 of P1, P2 are the input and output node, wherein P1 is the input node, and P2 is an output node.Bridge type impedance network circuit 12 is connected in series between the positive pole of the positive pole of input side power inverter 113 and 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 the three-phase voltage code converter, form three-phase H bridge construction by 6 power switch S7, S8, S9, S10, S11 and S12 that have the inverse parallel diode, wherein S7, S9, S11 are connected on the positive pole of three-phase brachium pontis respectively, S10, S12, S8 are connected on the negative pole of corresponding three-phase brachium pontis respectively, 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 a three phase alternating current motor.
Series electrical 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: the series resonant converter operating state is: the first switch S A in bidirectional switch 33 turn-offs, and the second switch SB of bidirectional switch turn-offs, 2 disconnections of two tie point A, B of bridge type impedance network circuit, first inductance L 1 is connected with second capacitor C 2 in the bridge type impedance network circuit, second inductance L 2 is connected with first capacitor C 1, and above-mentioned two-way series arm is connected in parallel by the input node P1 and the output node P2 point of bridge type impedance network again.The bridge type impedance network is realized series resonance, and busbar voltage or electric current can the 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: 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 bridge type impedance network circuit overlap, first inductance L 1 is in parallel with first capacitor C 1 in the bridge type impedance network circuit, second inductance L 2 is in parallel with 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.Bridge type impedance network circuit is realized parallel resonance, and busbar voltage or electric current can the 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 the 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 bridge type impedance network circuit are intermittently closed or disconnection along with the action of described bidirectional switch, because two equal switch conductions of switch of described bidirectional switch, electric current can two-way flow.Series electrical bridge type impedance network power inverter can work in normal rectification or inverter mode and pass-through state.Adopt the PWM commutation technique can realize the unity power factor conversion in grid side, to the electrical network no-harmonic wave pollution.
4) mode of operation 4: unidirectional power stream rises or the 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, two tie points of the A of bridge type impedance network, B are intermittently closed or disconnection along with the action of bidirectional switch, because switch switch conduction only in the described bidirectional switch, electric current can only one-way flow.Series electrical bridge type impedance network power inverter operates in unidirectional power stream and rises or the buck convertor operating state.
Figure 10 is the single-phase AC-AC converter circuit of series electrical bridge type impedance network.Interconnect and form by single phase poaer supply 101, input side power inverter 111, bridge type impedance network circuit 12, outlet side power inverter 221, monophase machine load 201.Wherein, input power supply 101 is connected with inductance by single-phase electrical network and is constituted; Input side power inverter 111 is the single-phase voltage code converter, form half-bridge structure by 2 power switch S1, S2 and two capacitor C 101, C201 that have the inverse parallel diode, S1 and S2 series connection, C101, C201 series connection, wherein S1, C101 are connected on the positive pole of brachium pontis respectively, and S2, C201 are connected on the negative pole of corresponding brachium pontis respectively.Bridge type impedance network 12 is connected in series by first inductance L 1, first capacitor C 1, second inductance L 2 and second capacitor C, 2 head and the tail and forms impedance network, 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 constitute bridge type impedance network circuit, two tie points of P1, P2 are the input and output node, wherein P1 is the input node, and P2 is an output node.Bridge type impedance network 12 is connected in series between the positive pole of the positive pole of input side power inverter 111 and 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 the single-phase voltage code converter, form half-bridge structure by 2 power switch S7, S8 and two capacitor C 701, C801 that have the inverse parallel diode, S7 and S8 series connection, C701, C801 series connection, wherein S7, C701 are connected on the positive pole of brachium pontis respectively, and S8, C801 are connected on the negative pole of corresponding brachium pontis respectively.Load 201 is the one-way communication motor.The single-phase AC-AC converter circuit of 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 the 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 inverse-impedance type IGBT switching device (RB-IGBT), and two switch reverse parallel connections are formed; (2) or the described first switch S A and second switch SB be the IGBT switching device of band fly-wheel diode, and two switch differential concatenations form, wherein the collector electrode of two IGBT switches is interconnected; (3) or the described first switch S A and second switch SB be the IGBT switching device of band fly-wheel diode, and two switch differential concatenations form, wherein the emitter of two IGBT switches is interconnected.
Claims (8)
1. bridge type impedance network circuit, it is characterized in that described bridge type impedance network circuit (12) is connected in series by first inductance (L1), first electric capacity (C1), second inductance (L2) and second electric capacity (C2) order head and the tail forms, described 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 bridge type impedance network circuit; Two other tie point of described bridge type impedance network circuit (P1, P2) is respectively input node (P1) and output node (P2).
2. bridge type impedance network circuit as claimed in claim 1, described bidirectional switch (33) comprise first switch (SA) and second switch (SB), and described first switch (SA) and second switch (SB) are the electric and electronic power switch.
3. bridge type impedance network circuit as claimed in claim 2, the composition form of described bidirectional switch (33) is any one in following three kinds: described first switch (SA) and second switch (SB) are inverse-impedance type IGBT switching device, and described first switch (SA) and second switch (SB) reverse parallel connection composition; Perhaps described first switch (SA) and second switch (SB) are the IGBT switching device of band fly-wheel diode, and described first switch (SA) and second switch (SB) differential concatenation are formed, and the collector electrode of described first switch (SA) and second switch (SB) is interconnected; Perhaps described first switch (SA) and second switch (SB) are the IGBT switching device of band fly-wheel diode, and described first switch (SA) and second switch (SB) differential concatenation are formed, and the emitter of described first switch (SA) and second switch (SB) is interconnected.
4. one kind comprises the series electrical bridge type impedance network power inverter as each described bridge type impedance network circuit among the claim 1-3, the input node (P1) that it is characterized in that described bridge type impedance network circuit (12) is connected with the positive pole of input side power inverter (11), the output node (P2) of described 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), constitutes series electrical bridge type impedance network power inverter.
5. series electrical bridge type impedance network power inverter as claimed in claim 4 is characterized in that the number of phases of described input side power inverter (11) and outlet side power inverter (22) is single-phase or heterogeneous.
6. series electrical bridge type impedance network power inverter as claimed in claim 4 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.
7. as claim 4,5 or 6 described series electrical bridge type impedance network power inverters, it is characterized in that in the described power inverter, when first switch (SA) shutoff of bidirectional switch and second switch (SB) shutoff of bidirectional switch, described power inverter operates in the series resonant converter operating state; When 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 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 the buck convertor operating state; When first switch (SA) switch motion of bidirectional switch and second switch (SB) shutoff of bidirectional switch, perhaps when 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 the buck convertor operating state.
8. control method as claim 4,5 or 6 described series electrical bridge type impedance network power inverters, described power inverter by first switch (SA) in the 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 first switch (SA) shutoff of bidirectional switch and second switch (SB) shutoff of bidirectional switch, described power inverter operates in the series resonant converter operating state; When 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 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 the buck convertor operating state; When first switch (SA) switch motion of described bidirectional switch and second switch (SB) shutoff of bidirectional switch, perhaps when 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 the buck convertor operating state.
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| CN102158072A (en) * | 2011-04-07 | 2011-08-17 | 中国科学院电工研究所 | Power inverter of parallel-connected electric bridge type impedance network |
| CN103453766A (en) * | 2013-08-28 | 2013-12-18 | 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 |
| CN109392220A (en) * | 2017-08-11 | 2019-02-26 | 大陆汽车有限公司 | Drive circuit, lighting apparatus and motor vehicles for light-emitting diode assembly |
| CN109462337A (en) * | 2018-12-29 | 2019-03-12 | 北京中科绿能科技有限公司 | A kind of high step-up ratio cascade connected electric bridge type impedance network DC/DC converter and control method |
| WO2020182114A1 (en) * | 2019-03-11 | 2020-09-17 | Versitech Ltd. | Ac-to-dc and dc-to-ac power conversion |
| CN111806267A (en) * | 2020-07-27 | 2020-10-23 | 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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| CN102158072A (en) * | 2011-04-07 | 2011-08-17 | 中国科学院电工研究所 | Power inverter of parallel-connected electric bridge type impedance network |
| 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 |
| CN103453766A (en) * | 2013-08-28 | 2013-12-18 | 淮北市平祥感应炉有限公司 | Parallel resonance single-unit furnace freely converting between two frequencies |
| 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 |
| CN109392220B (en) * | 2017-08-11 | 2020-12-18 | 大陆汽车有限公司 | Driver circuit for a light-emitting diode arrangement, lighting device and motor vehicle |
| CN109392220A (en) * | 2017-08-11 | 2019-02-26 | 大陆汽车有限公司 | Drive circuit, lighting apparatus and motor vehicles for light-emitting diode assembly |
| CN109462337A (en) * | 2018-12-29 | 2019-03-12 | 北京中科绿能科技有限公司 | A kind of high step-up ratio cascade connected electric bridge type impedance network DC/DC converter and control method |
| 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 |
| WO2020182114A1 (en) * | 2019-03-11 | 2020-09-17 | Versitech Ltd. | Ac-to-dc and dc-to-ac power conversion |
| CN111806267A (en) * | 2020-07-27 | 2020-10-23 | 哈尔滨工业大学 | Electric automobile traction-bidirectional charging system based on quadruple staggered parallel DC/DC |
| 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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