CN204498017U - A kind of multi-level converter circuit - Google Patents
A kind of multi-level converter circuit Download PDFInfo
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- CN204498017U CN204498017U CN201520230487.2U CN201520230487U CN204498017U CN 204498017 U CN204498017 U CN 204498017U CN 201520230487 U CN201520230487 U CN 201520230487U CN 204498017 U CN204498017 U CN 204498017U
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Abstract
The utility model relates to a kind of multi-level converter circuit, comprise: the first signaling module, secondary signal module, be connected to the first mixing multistate switch module between described first signaling module and described secondary signal module and the second mixing multistate switch module, the first signal received from described first signaling module is transformed into secondary signal and described secondary signal is outputted to described secondary signal module or the secondary signal received from described secondary signal module be transformed into the first signal and described first signal is outputted to described first signaling module by described first mixing multistate switch module and described second mixing multistate switch module.The utility model adopts mixing multistate switch module, therefore the number of current sample can be reduced, reduce sampling cost and sampling complexity, and mix in polymorphic sampling switch module and employ transformer, the automatic current equalizing that therefore can realize electric current controls, do not need to control separately and sharing control electric current, reduce and control complexity.
Description
Technical field
The utility model relates to commutation inversion field, more particularly, relates to a kind of multi-level converter circuit.
Background technology
Multi-level converter circuit (such as rectification circuit or inverter circuit) is widely used in the products such as communication power supply, photovoltaic converter, uninterrupted power supply (Uninterrupt Power Supply, UPS).It is except carrying out the voltage transitions of AC and DC, also to realize total harmonic distortion (the Total Harmonic Distortion of power factor correction or the output inputted simultaneously, THD) control, meets the requirement of various standard to input-output characteristic.Raise the efficiency and this target of power density to realize simultaneously, start to adopt Interleaving and Transformer Paralleling in multi-level converter circuit.
But, the shortcoming of Interleaving and Transformer Paralleling is to need to sample the inductance of each interleaved units or switching tube electric current, carries out the independent control of electric current, needs to increase equalizing controller simultaneously and eliminates circulation between each unit, the cost of therefore sampling is high, current controller complex structure.And the element number of crisscross parallel many time (as being greater than two parallel units) sharing control complexity increase a lot, larger to the functional requirement of control chip, cost is high.
Therefore, need that a kind of sample rate current quantity is few, the low and multi-level converter circuit that complexity is little of sampling cost.
Utility model content
The technical problems to be solved in the utility model is, multi-level converter circuit sampling amount of current for prior art is many, need to carry out to each sample rate current the defect that controls separately, provide that a kind of sample rate current quantity is few, sampling cost is low and the multi-level converter circuit that complexity is little.
The utility model solves the technical scheme that its technical problem adopts: construct a kind of multi-level converter circuit, comprise: the first signaling module, secondary signal module, multistate switch module and the second mixing multistate switch module is mixed for the first signal received from described first signaling module being transformed into secondary signal and described secondary signal being outputted to described secondary signal module or the secondary signal received from described secondary signal module is transformed into the first signal and described first signal is outputted to first of described first signaling module, described first mixing multistate switch module and described second mixing multistate switch model calling are between described first signaling module and described secondary signal module.
In multi-level converter circuit described in the utility model, described first mixing multistate switch module and described second mixing multistate switch module comprise mixing tri-state switch module, mix four state switch modules and mixing five state switch modules.
In multi-level converter circuit described in the utility model, described first mixing multistate switch module comprises the first transformer, first switch, second switch, 3rd switch, 4th switch, first bidirectional switch and the second bidirectional switch, the first terminal of the first winding of described first transformer is connected the first end of described first signaling module with the first terminal of the second winding of described first transformer, second terminal of the first winding of described first transformer connects the first end of described first switch and the second end of described second switch, second terminal of the second winding of described first transformer connects the first end of the 3rd switch and the second end of described 4th switch, second end of described first switch, second end of described 3rd switch connects the first end of described secondary signal module, the first end of described second switch, the first end of described 4th switch connects the second end of described secondary signal module, the first end of described first bidirectional switch connects the first end of described first switch, second end of described first bidirectional switch connects the 3rd end of described secondary signal module, the first end of described second bidirectional switch connects the first end of described 3rd switch, second end of described second bidirectional switch connects the 3rd end of described secondary signal module.
In multi-level converter circuit described in the utility model, described second mixing multistate switch module comprises the second transformer, 5th switch, 6th switch, 7th switch, 8th switch, 3rd bidirectional switch and the 4th bidirectional switch, the first terminal of the first winding of described second transformer is connected the second end of described first signaling module with the first terminal of the second winding of described second transformer, second terminal of the first winding of described second transformer connects the first end of described 5th switch and the second end of described 6th switch, second terminal of the second winding of described second transformer connects the first end of the 7th switch and the second end of described 8th switch, second end of described 5th switch, second end of described 7th switch connects the first end of described secondary signal module, the first end of described 6th switch, the first end of described 8th switch connects the second end of described secondary signal module, the first end of described 3rd bidirectional switch connects the first end of described 5th switch, second end of described 3rd bidirectional switch connects the 3rd end of described secondary signal module, the first end of described 4th bidirectional switch connects the first end of described 7th switch, second end of described 4th bidirectional switch connects the 3rd end of described secondary signal module.
In multi-level converter circuit described in the utility model, described first signaling module comprises voltage source, the first end of described voltage source connects the first end of described first signaling module, second end of described voltage source connects the second end of described first signaling module, described secondary signal module comprises the first voltage source device and the second voltage source device, between described first voltage source device and described second voltage source devices in series to the first end and the second end of described secondary signal module, the tie point ground connection of described first voltage source device and described second voltage source device.
In multi-level converter circuit described in the utility model, described first signaling module also comprises the first rectification/inversion inductor and/or the second rectification/inversion inductor, described first rectification/inversion inductor is connected between the first end of described voltage source and the first end of described first signaling module, and described second rectification/inversion inductor is connected between the second end of described voltage source and the second end of described first signaling module.
In multi-level converter circuit described in the utility model, described first signaling module also comprises the first electromagnetic interface filter, and the input of described first electromagnetic interface filter connects described voltage source, output connects described first rectification/inversion inductor and/or described second rectification/inversion inductor.
In multi-level converter circuit described in the utility model, described first signaling module comprises filter capacitor and load, the first end of described filter capacitor is connected to the first end of described first signaling module, second end of described filter capacitor is connected to the second end of described first signaling module, and described load is connected to the two ends of described filter capacitor; Described secondary signal module comprises tertiary voltage source device and the 4th voltage source device, to be connected between the first end of described secondary signal module and the second end and the tie point ground connection of described tertiary voltage source device and described 4th voltage source device after described first voltage source device and described second voltage source devices in series.
In multi-level converter circuit described in the utility model, described first signaling module comprises the first filter inductance and/or the second filter inductance, described first filter inductance is connected between the first end of described filter capacitor and the first end of described first signaling module, and described second filter inductance is connected between the second end of described filter capacitor and the second end of described first signaling module.
In multi-level converter circuit described in the utility model, described first signaling module also comprises the second electromagnetic interface filter, and described second electromagnetic interface filter is connected between described filter capacitor and described load.
Implement multi-level converter circuit of the present utility model, because have employed mixing multistate switch module, therefore can reduce the number of current sample, reduce sampling cost and sampling complexity.Further, mix in polymorphic sampling switch module and employ transformer, the automatic current equalizing that therefore can realize electric current controls, and does not therefore need to control separately and sharing control electric current, reduces and controls complexity.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is the theory diagram of multi-level converter circuit of the present utility model;
Fig. 2 is the circuit theory diagrams of the first embodiment of multi-level converter circuit of the present utility model;
The modulation signal of the bidirectional switch S1-S4 that Fig. 3 A shows the multi-level converter circuit shown in Fig. 2 when duty ratio D>0.5 and drive singal schematic diagram;
The modulation signal of the bidirectional switch S1-S4 that Fig. 3 B shows the multi-level converter circuit shown in Fig. 2 when duty ratio D<0.5 and drive singal schematic diagram;
The modulation signal of the bidirectional switch S1-S4 that Fig. 3 C shows the multi-level converter circuit shown in Fig. 2 when duty ratio D=0.5 and drive singal schematic diagram;
Fig. 4 A is the current direction figure of the multi-level converter circuit of first state of the bidirectional switch S1-S4 shown in Fig. 3 A;
Fig. 4 B is the current direction figure of the multi-level converter circuit of second state of the bidirectional switch S1-S4 shown in Fig. 3 A;
Fig. 4 C is the current direction figure of the multi-level converter circuit of the third state of the bidirectional switch S1-S4 shown in Fig. 3 A;
Fig. 4 D is the current direction figure of the multi-level converter circuit of the 4th state of the bidirectional switch S1-S4 shown in Fig. 3 A;
Fig. 4 E is the current direction figure of the multi-level converter circuit of the 5th state of the bidirectional switch S1-S4 shown in Fig. 3 A;
Fig. 4 F is the current direction figure of the multi-level converter circuit of the 6th state of the bidirectional switch S1-S4 shown in Fig. 3 A;
Fig. 4 G is the current direction figure of the multi-level converter circuit of the 7th state of the bidirectional switch S1-S4 shown in Fig. 3 A;
Fig. 4 H is the current direction figure of the multi-level converter circuit of the 8th state of the bidirectional switch S1-S4 shown in Fig. 3 A;
Fig. 5 A is the equivalent circuit diagram of the current direction figure shown in Fig. 4 A;
Fig. 5 B is the equivalent circuit diagram of the current direction figure shown in Fig. 4 B;
Fig. 5 C is the equivalent circuit diagram of the current direction figure shown in Fig. 4 C;
Fig. 5 D is the equivalent circuit diagram of the current direction figure shown in Fig. 4 D;
Fig. 5 E is the equivalent circuit diagram of the current direction figure shown in Fig. 4 E;
Fig. 5 F is the equivalent circuit diagram of the current direction figure shown in Fig. 4 F;
Fig. 5 G is the equivalent circuit diagram of the current direction figure shown in Fig. 4 G;
Fig. 5 H is the equivalent circuit diagram of the current direction figure shown in Fig. 4 H;
Fig. 6 is the circuit theory diagrams of the second embodiment of multi-level converter circuit of the present utility model;
Fig. 7 is the circuit theory diagrams of the 3rd embodiment of multi-level converter circuit of the present utility model;
Fig. 8 is the circuit theory diagrams of the 4th embodiment of multi-level converter circuit of the present utility model;
Fig. 9 is the circuit theory diagrams of the 5th embodiment of multi-level converter circuit of the present utility model;
Figure 10 is the circuit theory diagrams of the 6th embodiment of multi-level converter circuit of the present utility model;
Figure 11 is the circuit theory diagrams of the 7th embodiment of multi-level converter circuit of the present utility model;
Figure 12 is the circuit theory diagrams of the 8th embodiment of multi-level converter circuit of the present utility model;
Figure 13 is the circuit theory diagrams of the 9th embodiment of multi-level converter circuit of the present utility model;
Figure 14 is the circuit theory diagrams of the tenth embodiment of multi-level converter circuit of the present utility model;
Figure 15 is the circuit theory diagrams of the 11 embodiment of multi-level converter circuit of the present utility model;
Figure 16 is the circuit theory diagrams of the 12 embodiment of multi-level converter circuit of the present utility model;
Figure 17 is the circuit theory diagrams of the 13 embodiment of multi-level converter circuit of the present utility model;
Figure 18 is the circuit theory diagrams of the 14 embodiment of multi-level converter circuit of the present utility model;
Figure 19 A is the circuit diagram of the first embodiment of the bidirectional switch of multi-level converter circuit of the present utility model;
Figure 19 B is the circuit diagram of the second embodiment of the bidirectional switch of multi-level converter circuit of the present utility model;
Figure 19 C is the circuit diagram of the 3rd embodiment of the bidirectional switch of multi-level converter circuit of the present utility model;
Figure 19 D is the circuit diagram of the 4th embodiment of the bidirectional switch of multi-level converter circuit of the present utility model;
Figure 19 E is the circuit diagram of the 5th embodiment of the bidirectional switch of multi-level converter circuit of the present utility model;
Figure 19 F is the circuit diagram of the 6th embodiment of the bidirectional switch of multi-level converter circuit of the present utility model;
Figure 19 G is the circuit diagram of the 7th embodiment of the bidirectional switch of multi-level converter circuit of the present utility model;
Figure 20 A is the circuit diagram of the first embodiment of the switch of multi-level converter circuit of the present utility model;
Figure 20 B is the circuit diagram of the second embodiment of the switch of multi-level converter circuit of the present utility model;
Figure 20 C is the circuit diagram of the 3rd embodiment of the switch of multi-level converter circuit of the present utility model;
Figure 21 is the circuit diagram of the 15 embodiment of multi-level converter circuit of the present utility model.
Embodiment
Fig. 1 is the theory diagram of multi-level converter circuit of the present utility model.As shown in Figure 1, comprise at multi-level converter circuit of the present utility model: the first signaling module 100, secondary signal module 200, the first mixing multistate switch module 300 and second be connected between described first signaling module 100 and described secondary signal module 200 mix multistate switch module 400.In the utility model, described first mixing multistate switch module 300 and described second mixing multistate switch module 400 may be used for the first signal received from described first signaling module 100 being transformed into secondary signal and described secondary signal being outputted to described secondary signal module 200, also may be used for the secondary signal received from described secondary signal module 200 being transformed into the first signal and described first signal being outputted to described first signaling module 100.
In the utility model, described first mixing multistate switch module 300 and described second mixing multistate switch module 400 can comprise mixing tri-state switch module, mix four state switch modules, mix five state switch modules, mix six state switch modules ... .. N state switch module is mixed.Those skilled in the art know, except the embodiment shown in the utility model, described first mixing multistate switch module 300 and described second mixing multistate switch module 400 can build according to any mixing multistate switch as known in the art.
In the utility model, described multi-level converter circuit can be rectification circuit also can be inverter circuit.Described multi-level converter circuit not only can also comprise rectification circuit but also comprise inverter circuit.Described first signaling module 100 and secondary signal module 200 can construct according to any rectification circuit well known in the prior art or inverter circuit.
Implement multi-level converter circuit of the present utility model, compared with crisscross parallel, because have employed mixing multistate switch module, therefore can reduce the number of current sample, reduce sampling cost and sampling complexity.
Fig. 2 is the circuit theory diagrams of the first embodiment of multi-level converter circuit of the present utility model.Multi-level converter circuit shown in Fig. 2 is rectification circuit, and this rectification circuit comprises the first signaling module 100, secondary signal module 200, is connected to the first mixing multistate switch module 300 and the second mixing multistate switch module 400 between described first signaling module 100 and described secondary signal module 200.As shown in Figure 2, this first signaling module 100 comprises voltage source AC and inductor rectifier LS.This secondary signal module 200 comprises dc-link capacitance Co1, Co2 and load R1.Described first mixing multistate switch module 300 comprises transformer T1, diode D1, diode D2, diode D3, diode D4, bidirectional switch S1 and bidirectional switch S2.Described second mixing multistate switch module 400 comprises transformer T2, diode D5, diode D6, diode D7, diode D8, bidirectional switch S3 and bidirectional switch S4.
The first terminal of the first terminal of the former limit winding of described transformer T1 and the vice-side winding of described transformer T1 is connected to the first end of voltage source AC through inductor rectifier LS.Second terminal of the former limit winding of described transformer T1 connects the anode of described diode D1 and the negative electrode of described diode D2.Second end of the vice-side winding of described transformer T1 connects the anode of diode D3 and the negative electrode of described diode D4.The negative electrode of the negative electrode of described diode D1, described diode D3 connects the first end of dc-link capacitance Co1.The anode of described diode D2, the anode of described diode D4 connect the first end of described dc-link capacitance Co2.The second end connection bus mid point of dc-link capacitance Co1 and Co2.The first end of bidirectional switch S1 connects anode, the second end connection bus mid point of described diode D1.The first end of bidirectional switch S2 connects anode, the second end connection bus mid point of described diode D3.The first end of bidirectional switch S3 connects anode, the second end connection bus mid point of described diode D5.The first end of bidirectional switch S4 connects anode, the second end connection bus mid point of described diode D7.The first terminal of the first terminal of the former limit winding of described transformer T2 and the vice-side winding of described transformer T2 is connected to second end of voltage source AC.Second terminal of the former limit winding of described transformer T2 connects the anode of described diode D5 and the negative electrode of described diode D6, second terminal of the vice-side winding of described transformer T2 connects the anode of diode D7 and the negative electrode of described diode D8, and the negative electrode of the negative electrode of described diode D5, described diode D7 connects the first end of dc-link capacitance Co1.The anode of the anode of described diode D6, described diode D8 connects the first end of dc-link capacitance Co2.
In order to make order of the present utility model ground, feature and advantage become apparent more.Below in conjunction with Fig. 2, Fig. 3 A-3C, Fig. 4 A-H, Fig. 5 A-H, the principle of the multi-level converter circuit shown in Fig. 2 is described as follows.
The drive singal of bidirectional switch S1-S4 carries out the phase shift of certain angle in a switch periods, wherein bidirectional switch S1 and S2 phase shift 180 degree, bidirectional switch S3 with S4 be relative bidirectional switch S1 and S2 phase shift 90 degree respectively, and the drive singal of bidirectional switch S3 and S4 can exchange.According to input voltage vin and output voltage half
magnitude relationship can have different duty ratios, when
time bidirectional switch S1 and S2 duty ratio D<0.5, when
time bidirectional switch S1 and S2 duty ratio D=0.5, when
time bidirectional switch S1 and S2 duty ratio D>0.5.When Fig. 3 A-3C shows different duty ratios, the on off state of bidirectional switch S1-S4.
The current direction figure in each moment can be drawn, with current i shown in Fig. 2 according to the on off operating mode of bidirectional switch S1-S4
adirection flowing is from left to right example, when D>0.5, definition bidirectional switch S1-S4 conducting is 1 shutoff is 0, so, the all on off state of bidirectional switch S1, S2, S3, S4 has (1111) (0111) (0110) (0100) (1100) (1000) (1010) (1011), switch when can find out and switch between different on off states at every turn and only have a bidirectional switch to change state, can switching loss be reduced like this.Identical when the analytical method of the mode of operation of D<0.5 and D=0.5 and D>0.5.Fig. 4 A is the current direction figure that on off state (0111) is corresponding, Fig. 4 B is the current direction figure that on off state (0110) is corresponding.Fig. 4 C is the current direction figure that on off state (0100) is corresponding.Fig. 4 D is the current direction figure that on off state (1100) is corresponding.Fig. 4 E is the current direction figure that on off state (1000) is corresponding.Fig. 4 F is the current direction figure that on off state (1010) is corresponding.Fig. 4 G is the current direction figure that on off state (1011) is corresponding.Fig. 4 H is the current direction figure that on off state (1111) is corresponding.
Be described for Fig. 4 A, bidirectional switch S1 turns off, bidirectional switch S2, S3, S4 conducting, electric current divides two-way, one road is flowed out from power supply AC and is charged to dc-link capacitance Co1 through the former limit winding of inductance L s, transformer T1, diode D1, another road flows to the vice-side winding of transformer T1 through inductance L s, then through bidirectional switch S2 to bus mid point, bus mid point electric current flows back to power supply AC through the former limit of bidirectional switch S3, S4 and transformer T2 and secondary, meanwhile, dc-link capacitance Co1 and Co2 provides energy to load.
The equivalent circuit diagram under each mode can be drawn according to Fig. 4 A-H, be respectively Fig. 5 A-H.The reference direction of voltage as shown in Figure 2.Suppose that exporting DC bus total voltage is Vo, the voltage of dc-link capacitance Co1 and Co2 is respectively
can draw according to Fig. 5 H, because two winding Tp1 and Ts1 of the former secondary of transformer T1 are in parallel, so the voltage on two windings is equal, i.e. V
tp1=V
ts1=0; Two winding Tp2 and Ts2 of the former secondary of transformer T2 are in parallel, so the voltage on two windings is equal, i.e. and V
tp2=V
ts2=0, so inductive drop V
l=V
iN.Can draw according to Fig. 5 A, because two winding Tp1 and Ts1 of the former secondary of transformer T1 connect, so the voltage on two windings is equal, namely
two winding Tp2 and Ts2 of the former secondary of transformer T2 are in parallel, so the voltage on two windings is equal, i.e. and V
tp2=V
ts2=0, so inductive drop
can draw according to Fig. 5 B, because two winding Tp1 and Ts1 of the former secondary of transformer T1 connect, so the voltage on two windings is equal, namely
two winding Tp2 and Ts2 of the former secondary of transformer T2 connect, so the voltage on two windings is equal, namely
so inductive drop
can draw according to Fig. 5 C, because two winding Tp1 and Ts1 of the former secondary of transformer T1 connect, so the voltage on two windings is equal, namely
two winding Tp2 and Ts2 of the former secondary of transformer T2 are in parallel, so the equal V of voltage on two windings
tp2=V
ts2=0, that is, so inductive drop
the equivalent electric circuit that eight switch mode correspondences five are different, (1111), (1100), (0100) and (1000), (0111) and (1011), (0110) and (1010) can be found out by equivalent electric circuit.Under the pattern of duty ratio D<0.5 and D=0.5, the computational methods of inductive drop are identical, can show that the voltage of the positive-negative half-cycle inductance at input voltage has respectively
seven level numbers.It can thus be appreciated that, make the voltage of inductor rectifier Ls become seven level by three level, so the sensibility reciprocal of filter inductance greatly can be reduced by the utility model multi-level converter circuit by using mixing tri-state switch module.The Flux consumption equilibrium equation writing out inductive drop can be arranged under different duty ratios, derive the variable relation of circuit thus, as the gain relationship etc. of output voltage and input voltage.
In the utility model, bidirectional switch S1-S4 can be bidirectional switch pipe.Any known bidirectional switch in this area, such as DIODE, MOSFET, IGBT, JFET, IGCT, MCT, IGFET, SiC MOSFET may be used to the utility model, and MOSFET, IGBT, JFET, IGFET and diode can also be adopted to form bidirectional switch pipe of the present utility model.Any known bidirectional switch in this area, its combination may be used to the utility model.Certainly, in simplified embodiment of the present utility model, inductor rectifier Ls can omit.
In other embodiments of the present utility model, as shown in Figure 6, in order to make circuit symmetrical thus be convenient to calculation of parameter, inductor rectifier Ls can be divided into inductor rectifier Ls1 and inductor rectifier Ls2.This inductor rectifier Ls1 is connected to the first end of voltage source AC and the first end of former limit winding of transformer T1 and the first end of vice-side winding.This inductor rectifier Ls2 is connected to second end of voltage source AC and the first end of former limit winding of transformer T2 and the first end of vice-side winding.
In other embodiments of the present utility model, as shown in Figure 7, the requirement of standard to total harmonic distortion etc. is met in order to make the input characteristics of rectification circuit, electromagnetic interface filter can be increased to reduce the noise of common and different mode between voltage source AC and inductor rectifier LS, namely the input of electromagnetic interface filter connects voltage source AC, and output connects inductor rectifier LS.Again as shown in Figure 8, also electromagnetic interface filter can be increased to reduce the noise of common and different mode between voltage source AC and inductor rectifier Ls1, inductor rectifier Ls2, the input of electromagnetic interface filter connects voltage source AC, output connects inductor rectifier Ls1, the input of electromagnetic interface filter connects voltage source AC, and output connects inductor rectifier Ls2.
In other embodiments of the present utility model, transformer T1 shown in Fig. 2 or 7 and inductor rectifier Ls can be integrated into a coupling inductance Ts, or the transformer T1 shown in Fig. 6 or 8 and inductor rectifier Ls1 be integrated into a coupling inductance Ts1, transformer T2 and inductor rectifier Ls2 and be integrated into a coupling inductance Ts2 (as shown in Figure 9).Adopt coupling inductance to substitute transformer and inductor rectifier, can electronic devices and components be saved, thus reduce circuit volume.
In other embodiments of the present utility model, as shown in Figure 10, this first signaling module 100 comprises voltage source AC and inductor rectifier LS.This secondary signal module 200 comprises dc-link capacitance Co1, Co2 and load R1.Described first mixing multistate switch module 300 and described second mixing multistate switch module 400 can be mixing four state switches.As shown in Figure 10, described first mixing multistate switch module 300 comprises bidirectional switch S1-S3, diode D1-D6 and transformer T1.Described second mixing multistate switch module 400 comprises bidirectional switch S4-S6, diode D7-D12 and transformer T2.In the present embodiment, the former limit winding of transformer T1 and T2 and vice-side winding number are three, and the brachium pontis quantity that bidirectional switch S1-S3 and diode D1-D6 is formed, the brachium pontis quantity that bidirectional switch S4-S6, diode D7-D12 are formed also is three.The annexation of concrete electronic devices and components can with reference to shown in Figure 10.Wherein, the vice-side winding of transformer T1 and transformer T2 connection triangular in shape.Those skilled in the art know, the embodiment shown in Figure 10 also can combine with the embodiment in Fig. 6-9.Based on instruction of the present utility model, those skilled in the art can realize this combination.Owing to can cancel out each other at the voltage of the vice-side winding of transformer in four states and above mixing multistate switch module, therefore in further embodiment of the present utility model, can omit the vice-side winding of transformer T1 and T2, physical circuit can be shown in Figure 11.
In the utility model, the device of composition bidirectional switch has the switching tubes such as DIODE, MOSFET, IGBT, JFET, IGCT, MCT, IGFET, SiC MOSFET, also has reverse blocking IGBT and inverse conductivity type IGBT, but is not limited to above-mentioned device.Figure 19 A-F shows the structure of bidirectional switch pipe for MOSFET and diode composition.In other embodiments of the present utility model, MOSFET IGBT, JFET, IGFET of Figure 19 A-G etc. can also be replaced forming bidirectional switch.Figure 19 G shows the bidirectional switch be made up of reverse blocking IGBT.Certainly, those skilled in the art can also adopt other bidirectional switch.In the utility model, described diode D1-D8 can adopt other switches to substitute, and such as MOSFET, or the inverse parallel of IGBT and diode, any known bidirectional switch in this area, its combination may be used to the utility model.Figure 20 A-C shows the schematic diagram of the switch that may be used for alternative described diode D1-D8.
Implement multi-level converter circuit of the present utility model, because have employed mixing multistate switch module, therefore can reduce the number of current sample, reduce sampling cost and sampling complexity.Further, mix in polymorphic sampling switch module and employ transformer, the automatic current equalizing that therefore can realize electric current controls, and does not therefore need to control separately and sharing control electric current, reduces and controls complexity.In addition, the use mixing polymorphic sampling switch module makes the level number of inductor rectifier voltage increase, and the size of inductance can reduce greatly, reduces the volume of passive device; And inductance ripple frequency be the N of the switching frequency of bidirectional switch doubly (N is switching tube brachium pontis number), therefore can reduce switching loss, improve power density and efficiency simultaneously.In other embodiments of the present utility model, this inductor rectifier also can be inversion inductor.
Figure 12 is the circuit theory diagrams of the 8th embodiment of multi-level converter circuit of the present utility model.Multi-level converter circuit shown in Figure 12 is inverter circuit, and this inverter circuit comprises the first signaling module 100, secondary signal module 200, is connected to the first mixing multistate switch module 300 and the second mixing multistate switch module 400 between described first signaling module 100 and described secondary signal module 200.As shown in figure 12, this first signaling module 100 comprises filter capacitor Co, filter inductance Lo and load RL.Described secondary signal module 200 comprises DC bus-bar voltage Vdc1 and DC bus-bar voltage Vdc2.Described first mixing multistate switch module 300 comprises transformer T1, switching tube S1, switching tube S2, switching tube S3, switching tube S4, bidirectional switch BS1 and bidirectional switch BS2.Described second mixing multistate switch module 400 comprises transformer T2, switching tube S5, switching tube S6, switching tube S7, switching tube S8, bidirectional switch BS3 and bidirectional switch BS4.
The first terminal of the first terminal of the former limit winding of described transformer T1 and the vice-side winding of described transformer T1 is connected to one end of filter capacitor Co through filter inductance Lo.Second terminal of the former limit winding of described transformer T1 connects the first end of described switching tube S1 and second end of described switching tube S2.The first end of the second end connecting valve pipe S3 of the vice-side winding of described transformer T1 and second end of described switching tube S4.Second end of second end of described switching tube S1, described switching tube S3 connects the positive pole of DC bus-bar voltage Vdc1.The first end of described switching tube S2, the first end of described switching tube S4 connect the negative pole of described DC bus-bar voltage Vdc2.The negative pole of DC bus-bar voltage Vdc1 and the plus earth of DC bus-bar voltage Vdc2.The first end of bidirectional switch BS1 connects first end, the second end ground connection of described switching tube S1.The first end of bidirectional switch BS2 connects first end, the second end ground connection of described switching tube S2.The first end of bidirectional switch BS3 connects first end, the second end ground connection of described switching tube S5.The first end of bidirectional switch BS4 connects first end, the second end ground connection of described switching tube S7.The first terminal of the first terminal of the former limit winding of described transformer T2 and the vice-side winding of described transformer T2 is connected to second end of filter capacitor Co.Load RL is connected to the two ends of filter capacitor Co.Second terminal of the former limit winding of described transformer T2 connects the first end of described switching tube S5 and second end of described switching tube S6, and the second terminal of the vice-side winding of described transformer T2 connects the first end of switching tube S7 and second end of described switching tube S8.Second end of second end of described switching tube S5, described switching tube S7 connects the positive pole of DC bus-bar voltage Vdc1.The first end of the first end of described switching tube S6, described switching tube S8 connects the negative pole of DC bus-bar voltage Vdc2.
In the present embodiment, switching tube S1, S3, S6, S8 be turn-on and turn-off when the sense of current as shown in figure 12, and switching tube S5, S7, S2, S4 be turn-on and turn-off when contrary with the sense of current as shown in figure 12.The switching tube BS1-BS4 that mid point is clamped and the complementary conducting of the switching tube S1-S8 be connected or normal open.Concrete break-make mode is relevant with modulator approach.Those skilled in the art can select according to actual conditions.List possible a kind of control method below.When output current is for direction shown in Figure 12, switching tube S1, S3 of the first mixing multistate switch module 300 and clamped bidirectional switch BS1, the BS2 of mid point carry out turn-on and turn-off as required.Switching tube S6, S8 of second mixing multistate switch module 400 and clamped bidirectional switch BS3, the BS4 of mid point carry out turn-on and turn-off as required.The carrier signal phase shift of bidirectional switch BS1 and BS2 180 °, the carrier signal phase shift of bidirectional switch BS3 and BS4 180 °, the carrier signal phase shift of bidirectional switch BS3 or BS4 and BS1 90 °.The complementary conducting of the switching tube S1-S8 of vertical brachium pontis and the clamped bidirectional switch BS1-BS4 of mid point.The drive singal of bidirectional switch BS3 and BS4 can exchange.In the present embodiment, the magnitude relationship according to input voltage half Vdc/2 and output voltage Vo can have different duty ratios, and the on off state of the converter circuit that concrete on off state can be shown in Figure 2, has just been not repeated at this.
In other embodiments of the present utility model, as shown in figure 13, in order to circuit symmetrical, filter inductance Lo can be divided into filter inductance Lo1 and filter inductance Lo2.This filter inductance Lo1 is connected to the first end of filter capacitor Co and the first end of former limit winding of transformer T1 and the first end of vice-side winding.This filter inductance Lo2 is connected to second end of filter capacitor Co and the first end of former limit winding of transformer T2 and the first end of vice-side winding.
In other embodiments of the present utility model, as shown in figure 14, in order to make the output characteristic of inverter circuit meet the requirement of standard to total harmonic distortion etc., electromagnetic interface filter is connected to the noise reducing common and different mode between described filter capacitor Co and described load RL.Again as shown in figure 15, when circuit has filter inductance Lo1 and filter inductance Lo2, also can increase electromagnetic interface filter to reduce the noise of common and different mode between filter capacitor Co and load RL.
In other embodiments of the present utility model, transformer T1 shown in Figure 12 or 14 and filter inductance Lo can be integrated into a coupling inductance Ts, or the transformer T1 shown in Figure 13 or 15 and filter inductance Lo1 be integrated into a coupling inductance Ts1, transformer T2 and filter inductance Lo1 and be integrated into a coupling inductance Ts2 (as shown in figure 16).
In other embodiments of the present utility model, as shown in figure 17, this inverter circuit comprises the first signaling module 100, secondary signal module 200, is connected to the first mixing multistate switch module 300 and the second mixing multistate switch module 400 between described first signaling module 100 and described secondary signal module 200.As shown in figure 17, this first signaling module 100 comprises filter capacitor Co, filter inductance Lo and load RL.Described secondary signal module 200 comprises DC bus-bar voltage Vdc1 and DC bus-bar voltage Vdc2.Described first mixing multistate switch module 300 comprises transformer T1, switching tube S1-S6, bidirectional switch BS1-BS3.Described second mixing multistate switch module 400 comprises transformer T2, switching tube S7-S12, bidirectional switch BS4-BS6.
In the present embodiment, the former limit winding of transformer T1 and T2 and vice-side winding number are three, and the brachium pontis quantity that bidirectional switch BS1-BS3 and switching tube S1-S6 is formed, the brachium pontis quantity that bidirectional switch BS4-BS6, switching tube S7-S12 are formed also is three.The annexation of concrete electronic devices and components can with reference to shown in Figure 17.Wherein, the vice-side winding of transformer T1 and transformer T2 connection triangular in shape.Those skilled in the art know, the embodiment shown in Figure 17 also can combine with the embodiment in Figure 13-16.Based on instruction of the present utility model, those skilled in the art can realize this combination.Owing to can cancel out each other at the voltage of the vice-side winding of transformer in four states and above mixing multistate switch module, therefore in further embodiment of the present utility model, can omit the vice-side winding of transformer T1 and T2, physical circuit can be shown in Figure 18.
In the utility model, the device of composition bidirectional switch has the switching tubes such as DIODE, MOSFET, IGBT, JFET, IGCT, MCT, IGFET, SiC MOSFET, also has reverse blocking IGBT and inverse conductivity type IGBT, but is not limited to above-mentioned device.Figure 19 A-F shows the structure of bidirectional switch pipe for MOSFET and diode composition.In other embodiments of the present utility model, MOSFET IGBT, JFET, IGFET of Figure 19 A-G etc. can also be replaced forming bidirectional switch.Figure 19 G shows the bidirectional switch be made up of reverse blocking IGBT.Certainly, those skilled in the art can also adopt other bidirectional switch.In the utility model, described diode D1-D12 can adopt other switching devices to substitute, and such as MOSFET, or the inverse parallel of IGBT and diode, any known bidirectional switch in this area, its combination may be used to the utility model.Figure 20 A-C shows the schematic diagram of the switching device that may be used for alternative described diode D1-D12.
Figure 21 is the circuit diagram of the fifteenth embodiment of multi-level converter circuit of the present utility model.As shown in figure 21, described multi-level converter circuit comprises the rectifier filter and rectifier circuit portion that are arranged on left side, and is arranged on inversion filter and the inverter circuit part on right side.Physical circuit structure is see Figure 21.Those skilled in the art know, described rectifier circuit portion can also the embodiment according to Fig. 2,6-11 construct, and described inverter circuit part can also the embodiment according to Figure 12-18 construct.Based on instruction of the present utility model, those skilled in the art can realize multi-level converter circuit of the present utility model, have just been not repeated at this.
Implement multi-level converter circuit of the present utility model, because have employed mixing multistate switch module, therefore can reduce the number of current sample, reduce sampling cost and sampling complexity.Further, mix in polymorphic sampling switch module and employ transformer, the automatic current equalizing that therefore can realize electric current controls, and does not therefore need to control separately and sharing control electric current, reduces and controls complexity.In addition, the use mixing polymorphic sampling switch module makes the level number of inductor rectifier voltage increase, and the size of inductance can reduce greatly, reduces the volume of passive device; And inductance ripple frequency be the N of the switching frequency of bidirectional switch doubly (N is switching tube brachium pontis number), therefore can reduce switching loss, improve power density and efficiency simultaneously.
Although the utility model is described by specific embodiment, it will be appreciated by those skilled in the art that, when not departing from the utility model scope, various conversion can also be carried out and be equal to substituting to the utility model.Therefore, the utility model is not limited to disclosed specific embodiment, and should comprise the whole execution modes fallen in the utility model right.
Claims (10)
1. a multi-level converter circuit, it is characterized in that, comprise: the first signaling module, secondary signal module, multistate switch module and the second mixing multistate switch module is mixed for the first signal received from described first signaling module being transformed into secondary signal and described secondary signal being outputted to described secondary signal module or the secondary signal received from described secondary signal module is transformed into the first signal and described first signal is outputted to first of described first signaling module, described first mixing multistate switch module and described second mixing multistate switch model calling are between described first signaling module and described secondary signal module.
2. multi-level converter circuit according to claim 1, is characterized in that, described first mixing multistate switch module and described second mixing multistate switch module comprise mixing tri-state switch module, mix four state switch modules and mixing five state switch modules.
3. multi-level converter circuit according to claim 2, it is characterized in that, described first mixing multistate switch module comprises the first transformer, first switch, second switch, 3rd switch, 4th switch, first bidirectional switch and the second bidirectional switch, the first terminal of the first winding of described first transformer is connected the first end of described first signaling module with the first terminal of the second winding of described first transformer, second terminal of the first winding of described first transformer connects the first end of described first switch and the second end of described second switch, second terminal of the second winding of described first transformer connects the first end of the 3rd switch and the second end of described 4th switch, second end of described first switch, second end of described 3rd switch connects the first end of described secondary signal module, the first end of described second switch, the first end of described 4th switch connects the second end of described secondary signal module, the first end of described first bidirectional switch connects the first end of described first switch, second end of described first bidirectional switch connects the 3rd end of described secondary signal module, the first end of described second bidirectional switch connects the first end of described 3rd switch, second end of described second bidirectional switch connects the 3rd end of described secondary signal module.
4. multi-level converter circuit according to claim 3, it is characterized in that, described second mixing multistate switch module comprises the second transformer, 5th switch, 6th switch, 7th switch, 8th switch, 3rd bidirectional switch and the 4th bidirectional switch, the first terminal of the first winding of described second transformer is connected the second end of described first signaling module with the first terminal of the second winding of described second transformer, second terminal of the first winding of described second transformer connects the first end of described 5th switch and the second end of described 6th switch, second terminal of the second winding of described second transformer connects the first end of the 7th switch and the second end of described 8th switch, second end of described 5th switch, second end of described 7th switch connects the first end of described secondary signal module, the first end of described 6th switch, the first end of described 8th switch connects the second end of described secondary signal module, the first end of described 3rd bidirectional switch connects the first end of described 5th switch, second end of described 3rd bidirectional switch connects the 3rd end of described secondary signal module, the first end of described 4th bidirectional switch connects the first end of described 7th switch, second end of described 4th bidirectional switch connects the 3rd end of described secondary signal module.
5. multi-level converter circuit according to claim 4, it is characterized in that, described first signaling module comprises voltage source, the first end of described voltage source connects the first end of described first signaling module, second end of described voltage source connects the second end of described first signaling module, described secondary signal module comprises the first voltage source device and the second voltage source device, between described first voltage source device and described second voltage source devices in series to the first end and the second end of described secondary signal module, the tie point ground connection of described first voltage source device and described second voltage source device.
6. multi-level converter circuit according to claim 5, it is characterized in that, described first signaling module also comprises the first rectification/inversion inductor and/or the second rectification/inversion inductor, described first rectification/inversion inductor is connected between the first end of described voltage source and the first end of described first signaling module, and described second rectification/inversion inductor is connected between the second end of described voltage source and the second end of described first signaling module.
7. multi-level converter circuit according to claim 6, it is characterized in that, described first signaling module also comprises the first electromagnetic interface filter, and the input of described first electromagnetic interface filter connects described voltage source, output connects described first rectification/inversion inductor and/or described second rectification/inversion inductor.
8. multi-level converter circuit according to claim 4, it is characterized in that, described first signaling module comprises filter capacitor and load, the first end of described filter capacitor is connected to the first end of described first signaling module, second end of described filter capacitor is connected to the second end of described first signaling module, and described load is connected to the two ends of described filter capacitor; Described secondary signal module comprises tertiary voltage source device and the 4th voltage source device, to be connected between the first end of described secondary signal module and the second end and the tie point ground connection of described tertiary voltage source device and described 4th voltage source device after described first voltage source device and described second voltage source devices in series.
9. multi-level converter circuit according to claim 8, it is characterized in that, described first signaling module comprises the first filter inductance and/or the second filter inductance, described first filter inductance is connected between the first end of described filter capacitor and the first end of described first signaling module, and described second filter inductance is connected between the second end of described filter capacitor and the second end of described first signaling module.
10. multi-level converter circuit according to claim 8, is characterized in that, described first signaling module also comprises the second electromagnetic interface filter, and described second electromagnetic interface filter is connected between described filter capacitor and described load.
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| CN201520230487.2U CN204498017U (en) | 2015-04-16 | 2015-04-16 | A kind of multi-level converter circuit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106533150A (en) * | 2015-09-09 | 2017-03-22 | 力博特公司 | Mutual inductor magnetic balance method and device of multi-state switch circuit |
| CN107332449A (en) * | 2016-04-28 | 2017-11-07 | 中兴通讯股份有限公司 | A kind of three-phase circuit device and its method for realizing rectification |
| CN109286329A (en) * | 2017-07-22 | 2019-01-29 | 中兴通讯股份有限公司 | A kind of rectification circuit device and implementation method for three-phase electricity |
| CN112771776A (en) * | 2018-09-27 | 2021-05-07 | Abb瑞士股份有限公司 | Apparatus for conversion between AC power and DC power |
-
2015
- 2015-04-16 CN CN201520230487.2U patent/CN204498017U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106533150A (en) * | 2015-09-09 | 2017-03-22 | 力博特公司 | Mutual inductor magnetic balance method and device of multi-state switch circuit |
| CN106533150B (en) * | 2015-09-09 | 2018-10-09 | 力博特公司 | A kind of mutual inductor magnetic balance method and apparatus of multistate switch circuit |
| CN107332449A (en) * | 2016-04-28 | 2017-11-07 | 中兴通讯股份有限公司 | A kind of three-phase circuit device and its method for realizing rectification |
| CN109286329A (en) * | 2017-07-22 | 2019-01-29 | 中兴通讯股份有限公司 | A kind of rectification circuit device and implementation method for three-phase electricity |
| CN112771776A (en) * | 2018-09-27 | 2021-05-07 | Abb瑞士股份有限公司 | Apparatus for conversion between AC power and DC power |
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