CN109861576A - A kind of Z-source inverter allowing work in discontinuous conduct mode - Google Patents
A kind of Z-source inverter allowing work in discontinuous conduct mode Download PDFInfo
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- CN109861576A CN109861576A CN201910305607.3A CN201910305607A CN109861576A CN 109861576 A CN109861576 A CN 109861576A CN 201910305607 A CN201910305607 A CN 201910305607A CN 109861576 A CN109861576 A CN 109861576A
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Abstract
The invention discloses a kind of Z-source inverters for allowing work in discontinuous conduct mode, belong to converters technical field.Including three phase inverter bridge, it include two switching tubes in each bridge arm, Z-source inverter further includes DC power supply, inductance L, capacitor C, diode Db, diode Di, switching tube Si and switching tube S7, the anode of DC power supply is connect with one end of inductance L, the other end of the inductance L emitter with switching tube Si respectively, the anode of diode Di is connected with the anode of three phase inverter bridge DC bus, diode Di and switching tube Si inverse parallel, the collector of switching tube Si is connect with one end of the collector of switching tube S7 and capacitor C respectively, the other end of capacitor C is connect with the negative terminal of the anode of diode Db and three phase inverter bridge DC bus respectively, the cathode of diode Db is connect with the cathode of the emitter of switching tube S7 and DC power supply respectively.Z-source inverter of the invention can eliminate DC-link voltage distortion, and more traditional one-way or bi-directional Z source converter has bigger step-up ratio.
Description
Technical field
The invention belongs to converters technical fields, allow work in discontinuous conduct mode more particularly to a kind of
Z-source inverter.
Background technique
Traditional Z source converter and the quasi- source the Z topology of all kinds of derivatives do not allow to work in discontinuous mode, in this feelings
Under condition, DC-link voltage meeting Severe distortion causes to load irregular working.2015, Anh-Vu Ho et al. proposed a kind of new
Z source converter claims the quasi- Z-source inverter of active switch capacitor/inductance, and the number of inductance and capacitor is only one in this converter network
It is a, greatly reduce converter volume and weight.But the drawback that such converter has its born: when inductance value is smaller, load
Under power factor is low or light duty, the case where DC-link voltage distorts, just will appear.The present invention proposes to solve this problem,
On this basis, the step-up ratio for taking into account Lifting Transform device expands its working range.
Summary of the invention
The purpose of the present invention is to solve existing Z source converters and the quasi- source the Z topology of all kinds of derivatives not to allow to work in
The problem of discontinuous mode, proposes a kind of Z-source inverter for allowing work in discontinuous conduct mode.
The invention is realized by the following technical scheme: a kind of Z-source inverter allowing work in discontinuous conduct mode, including
Three phase inverter bridge, the three phase inverter bridge include the first bridge arm, the second bridge arm and third bridge arm, include two in each bridge arm and open
Guan Guan, the Z-source inverter further include DC power supply, inductance L, capacitor C, diode Db, diode Di, switching tube Si and switch
Pipe S7, the DC power supply anode connect with one end of the inductance L, the other end of the inductance L respectively with the switch
The emitter of pipe Si, the anode of diode Di are connected with the anode of three phase inverter bridge DC bus, the diode Di and switch
Pipe Si inverse parallel, the collector of the switching tube Si are connect with one end of the collector of the switching tube S7 and capacitor C respectively, institute
The other end for stating capacitor C is connect with the negative terminal of the anode of the diode Db and the three phase inverter bridge DC bus respectively, institute
The cathode for stating diode Db is connect with the cathode of the emitter of the switching tube S7 and DC power supply respectively.
Further, first bridge arm includes the switching tube S1 and the switching tube S4, the hair of the switching tube S1
Emitter-base bandgap grading is connect with the collector of the switching tube S4；Second bridge arm includes the switching tube S3 and the switching tube S6, institute
The emitter for stating switching tube S3 is connect with the collector of the switching tube S6；The third bridge arm includes the switching tube S5 and institute
Switching tube S2 is stated, the emitter of the switching tube S5 is connect with the collector of the switching tube S2, the switching tube S1, described is opened
The collector for closing the pipe S3 and switching tube S5, which is connected, collectively forms the anode of the three phase inverter bridge DC bus, described
The emitter of switching tube S4, the switching tube S6 and the switching tube S2, which are connected, collectively forms the three phase inverter bridge direct current
The negative terminal of bus.
Further, the three phase inverter bridge output end is for connecting load.
Further, the switching tube S1 in the three phase inverter bridge, switching tube S2, switching tube S3, switching tube S4, open
The switching signal for closing pipe S5 and switching tube S6 is controlled by the algorithm that SPWM or SVPWM are modulated, the three phase inverter bridge
Switching signal be sinusoidal signal.
Further, the working condition of the Z-source inverter is divided into four-stage,
First stage, Z-source inverter work is in non-pass-through state, and the inductance L is to the capacitor C and the load
Energy is provided, at this point, the voltage of the inductance L is Vin-Vc, wherein Vin and Vc is respectively DC power supply and capacitance voltage, depending on
Load including the three phase inverter bridge is a constant-current source Ii；
Second stage, in non-pass-through state, the inductance L electric current is less than Ii, the switching tube for the Z-source inverter work
Si is open-minded, and inductance L and capacitor C provide energy to load jointly, and the voltage of the inductance L is still Vin-Vc, this stage ties up always
Hold the inductance L current over-zero；
Phase III, the Z-source inverter work is in non-pass-through state, the electricity of the electric current of the inductance L and the inductance L
Pressure is zero, this stage is continued for non-pass-through state terminating；
Fourth stage, the Z-source inverter work is in pass-through state, and the switching tube S7 is open-minded, and the switching tube Si is disconnected
It opens, the DC power supply and the capacitor C are the inductance L charging jointly, and the voltage of the inductance L is Vin+Vc.
Further, when the switch state of two switching tubes in any bridge arm is simultaneously 11, the switch S7's is opened
Off status is 1；
When the switch state of two switching tubes in any bridge arm is not simultaneously 11, the switch state of the switch S7 is
0；
The switching tube S7 is opposite with the switch state of the switching tube Si.
The beneficial effects of the present invention are:
(1) DC-link voltage distortion is eliminated.As shown in figure 3, smaller in inductance value, the power-factor of load is low or light duty
Under, traditional topology DC-link voltage will appear distortion.And new topology proposed by the present invention, inverse parallel switching tube Si are load
Electric current provides circuit, ensure that circuit works normally.
(2) step-up ratio is big.Smaller in inductance value, under the power-factor of load is low or light duty, New Topological is relative to biography
System topology can generate bigger step-up ratio (Vdc/Vin).As shown in figure 4, its step-up ratio can be expressed as
Wherein Ds is straight-through duty ratio, VinFor direct current power source voltage value, m is modulation
Coefficient,For power factor, Z is load impedance, and Ts is switch periods, and L is converter net inductive amount, △1It is intermediate become with k
Amount.
(3) allow bridgc arm short.When short circuit occurs in any bridge arm in three phase inverter bridge, system all has immune function to this
Can, it is not in device damage situation.
(4) load current can be exported in pure sinusoid.At SPWM or SVPWM and its derivative modulation algorithm, load electricity
Stream can be exported in pure sinusoid form, guarantee output waveform quality.
Detailed description of the invention
Fig. 1 is a kind of circuit structure diagram of Z-source inverter in discontinuous conduct mode that allows work of the invention；
Fig. 2 is the driving signal figure of switching tube S1 to switching tube S7 and switching tube Si；
Fig. 3 is a kind of DC-link voltage waveform diagram of Z-source inverter in discontinuous conduct mode that allows work of the invention；
Fig. 4 is a kind of boost capability schematic diagram of Z-source inverter in discontinuous conduct mode that allows work of the invention；
Fig. 5 is a kind of four stage working state figures of Z-source inverter in discontinuous conduct mode that allows work of the invention.
Specific embodiment
Technical solution in the embodiment of the present invention that following will be combined with the drawings in the embodiments of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on this
Embodiment in invention, every other reality obtained by those of ordinary skill in the art without making creative efforts
Example is applied, shall fall within the protection scope of the present invention.
Shown in referring to Fig.1, the present invention provides a kind of Z-source inverters for allowing work in discontinuous conduct mode, including three
Phase inverter bridge, three phase inverter bridge include the first bridge arm, the second bridge arm and third bridge arm, include two switching tubes, Z in each bridge arm
Source inventer further includes DC power supply, inductance L, capacitor C, diode Db, diode Di, switching tube Si and switching tube S7, direct current
The anode of power supply is connect with one end of inductance L, the other end of the inductance L sun with the emitter of switching tube Si, diode Di respectively
Pole is connected with the anode of three phase inverter bridge DC bus, diode Di and switching tube Si inverse parallel, the collector point of switching tube Si
Do not connect with one end of the collector of switching tube S7 and capacitor C, the other end of capacitor C respectively with the anode and three-phase of diode Db
The negative terminal of inverter bridge DC bus connects, the cathode of the diode Db cathode with the emitter of switching tube S7 and DC power supply respectively
Connection.
Specifically, three phase inverter bridge is more common structure, when short circuit occurs in bridge arm any in three bridge arms, entirely
Z-source inverter system to this with immune function, will not there is a situation where converter devices to damage.And switching tube Si is actually
The voltage of steady load is capable of in charge and discharge with diode Di inverse parallel, this structure cooperation inductance L and capacitor C.Such as Fig. 2 institute
Show, the generation of switching tube Si switching signal is to lean on the switch state of switching tube S1 to switching tube S6 to control, and switching tube S1 is extremely
The driving signal of switching tube S6 is obtained by nand logical operation.When two switching tube (such as switching tubes in any bridge arm
S1 and switching tube S4) switch state when being 1 (i.e. on state), switching tube Si is off, and switching tube S7 is conducting.
Switching tube in the present invention can be IGBT MOSFET power device.
Shown in referring to Fig.1, in the preferred embodiment of this part, the first bridge arm includes switching tube S1 and switching tube S4, switch
The emitter of pipe S1 is connect with the collector of switching tube S4；Second bridge arm includes switching tube S3 and switching tube S6, switching tube S3's
Emitter is connect with the collector of switching tube S6；Third bridge arm includes switching tube S5 and switching tube S2, the emitter of switching tube S5
It is connect with the collector of switching tube S2, the collector of switching tube S1, switching tube S3 and switching tube S5, which are connected, collectively forms three
The anode of phase inverter bridge DC bus, the emitter of switching tube S4, switching tube S6 and switching tube S2, which are connected, collectively forms three
The negative terminal of phase inverter bridge DC bus.
Shown in referring to Fig.1, in the preferred embodiment of this part, the output end of three phase inverter bridge can connect load, and
Allow to work in the low operating condition of the power-factor of load, DC-link voltage will not be caused to distort.
Switching tube S1, switching tube S2, switch referring to shown in Fig. 2, in the preferred embodiment of this part, in three phase inverter bridge
Pipe S3, switching tube S4, switching tube S5 and switching tube S6 switching signal controlled by the algorithm that SPWM or SVPWM are modulated
System, the switching signal of three phase inverter bridge are sinusoidal signal.
Referring to shown in Fig. 2, in the preferred embodiment of this part, the electric current of load is exported in sinusoidal form, more traditional unidirectional
Or two-way Z source converter has bigger step-up ratio.
Specifically, the electric current due to load is exported in sinusoidal form, then the switching signal of three phase inverter bridge should equally be positive
String signal.
SPWM (Sinusoidal PWM) method is a kind of comparative maturity, using wide PWM method.Momentum is equal and shape
When the different burst pulse of shape is added in the link with inertia, effect is essentially identical.SPWM method is exactly with the conclusion for theory
Basis, with pulse width by sinusoidal rule variation and in PWM waveform, that is, SPWM waveform control of inverter circuit equivalent with sine wave
The on-off of switching device, the area of the area for the pulse voltage for exporting it and the sine wave of desired output in respective bins
It is equal, the frequency and amplitude of inverter circuit output voltage are then adjusted by the frequency and amplitude that change modulating wave；
And the main thought of SVPWM is with three-phase symmetrical motor stator sub-ideal magnetic when the power supply of three-phase symmetrical sine voltage
Chain circle is reference standard, makees switching appropriate with three-phase inverter difference switching mode, so that PWM wave is formed, to be formed by
Practical flux linkage vector is round to track its accurate magnetic linkage.Traditional SPWM method is adjustable to generate one from the angle of power supply
The sine-wave power of frequency modulation pressure, and SVPWM method regards inversion system and asynchronous machine as an entirety to consider, model compares
Simply, it is also convenient for the real-time control of microprocessor.
Both above-mentioned modulator approaches are the method with switching tube switch in sine wave control inverter of comparative maturity.
Referring to Figure 5, in the preferred embodiment of this part, the working condition of Z-source inverter is divided into four-stage,
First stage, Z-source inverter work is in non-pass-through state, and inductance L provides energy to capacitor C and load, at this point, electric
The voltage for feeling L is Vin-Vc, wherein VinAnd VcRespectively DC power supply and capacitance voltage.Depending on negative including three phase inverter bridge
Carrying is a constant-current source Ii；
Second stage, Z-source inverter work are less than I in non-pass-through state, inductance L electric currenti, switching tube Si is open-minded, inductance L
Energy is provided to load jointly with capacitor C, the voltage of inductance L is still Vin-Vc, this stage is maintained to inductance L current over-zero；
Phase III, Z-source inverter work in non-pass-through state, and the electric current of inductance L and the voltage of inductance L are zero, this
Stage is continued for non-pass-through state terminating；
Fourth stage, Z-source inverter work in pass-through state, switching tube S7 is open-minded, switching tube Si disconnect, DC power supply and
Capacitor C is inductance L charging jointly, and the voltage of inductance L is Vin+Vc。
In the preferred embodiment of this part, when the switch state of two switching tubes in any bridge arm is simultaneously 1, switch
The switch state of S7 is 1；
When the switch state of two switching tubes in any bridge arm is not simultaneously 1, the switch state of switch S7 is 0；It opens
It is opposite with the switch state of switching tube Si to close pipe S7.
Claims (6)
1. a kind of Z-source inverter for allowing work in discontinuous conduct mode, including three phase inverter bridge, the three phase inverter bridge include
First bridge arm, the second bridge arm and third bridge arm include two switching tubes in each bridge arm, it is characterised in that: the Z-source inverter
It further include DC power supply, inductance L, capacitor C, diode Db, diode Di, switching tube Si and switching tube S7, the DC power supply
Anode connect with one end of the inductance L, the other end of the inductance L respectively with the emitter of the switching tube Si, two poles
The anode of pipe Di is connected with the anode of three phase inverter bridge DC bus, the diode Di and switching tube Si inverse parallel, described to open
The collector for closing pipe Si is connect with one end of the collector of the switching tube S7 and capacitor C respectively, the other end point of the capacitor C
It is not connect with the negative terminal of the anode of the diode Db and the three phase inverter bridge DC bus, the cathode point of the diode Db
It is not connect with the cathode of the emitter of the switching tube S7 and DC power supply.
2. a kind of Z-source inverter for allowing work in discontinuous conduct mode according to claim 1, it is characterised in that: institute
Stating the first bridge arm includes the switching tube S1 and the switching tube S4, and the emitter of the switching tube S1 is with the switching tube S4's
Collector connection；Second bridge arm includes the switching tube S3 and the switching tube S6, the emitter of the switching tube S3 with
The collector of the switching tube S6 connects；The third bridge arm includes the switching tube S5 and the switching tube S2, the switch
The emitter of pipe S5 is connect with the collector of the switching tube S2, the switching tube S1, the switching tube S3 and the switching tube
The collector of S5, which is connected, collectively forms the anode of the three phase inverter bridge DC bus, the switching tube S4, the switch
The emitter of pipe S6 and the switching tube S2, which are connected, collectively forms the negative terminal of the three phase inverter bridge DC bus.
3. a kind of Z-source inverter for allowing work in discontinuous conduct mode according to claim 2, it is characterised in that: institute
State three phase inverter bridge output end for connect load.
4. a kind of Z-source inverter for allowing work in discontinuous conduct mode according to claim 3, it is characterised in that: institute
State the switching tube S1 in three phase inverter bridge, switching tube S2, switching tube S3, switching tube S4, switching tube S5 and switching tube S6
Switching signal is controlled by the algorithm that SPWM or SVPWM are modulated, and the switching signal of the three phase inverter bridge is sinusoidal letter
Number.
5. a kind of Z-source inverter for allowing work in discontinuous conduct mode according to any one of claims 1-4, special
Sign is: the working condition of the Z-source inverter is divided into four-stage,
First stage, in non-pass-through state, the inductance L is provided to the capacitor C and the load for the Z-source inverter work
Energy, at this point, the voltage of the inductance L is Vin-Vc, wherein VinAnd VcRespectively DC power supply and capacitance voltage, depending on including institute
Stating the load including three phase inverter bridge is a constant-current source Ii；
Second stage, in non-pass-through state, the inductance L electric current is less than I for the Z-source inverter worki, the switching tube Si opens
Logical, inductance L and capacitor C provide energy to load jointly, and the voltage of the inductance L is still Vin-Vc, this stage is maintained to institute
State inductance L current over-zero；
Phase III, in non-pass-through state, the voltage of the electric current of the inductance L and the inductance L are equal for Z-source inverter work
It is zero, this stage is continued for non-pass-through state terminating；
Fourth stage, the Z-source inverter work is in pass-through state, and the switching tube S7 is open-minded, and the switching tube Si is disconnected, institute
It states DC power supply and the capacitor C is the inductance L charging jointly, the voltage of the inductance L is Vin+Vc。
6. a kind of Z-source inverter for allowing work in discontinuous conduct mode according to claim 2, it is characterised in that:
When the switch state of two switching tubes in any bridge arm is simultaneously connected state, the switch state of the switch S7 is
Connected state；
When the switch state of two switching tubes in any bridge arm is not simultaneously connected state, the switch state of the switch S7
For off-state；
The switching tube S7 is opposite with the switch state of the switching tube Si.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112751497A (en) * | 2019-10-30 | 2021-05-04 | 昱能科技股份有限公司 | Control method and system of three-phase grid-connected inverter and three-phase grid-connected inverter |
| CN114583991A (en) * | 2022-05-07 | 2022-06-03 | 深圳古瑞瓦特新能源有限公司 | Gain-adjustable single-phase DCAC converter, control method and three-phase DCAC converter |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20170062243A (en) * | 2015-11-27 | 2017-06-07 | 울산대학교 산학협력단 | Power converter based on quasi z-source inverter |
| CN107612404A (en) * | 2017-10-09 | 2018-01-19 | 哈尔滨工业大学 | Γ source inventers and modulator approach based on switching capacity |
| CN107681914A (en) * | 2017-10-09 | 2018-02-09 | 哈尔滨工业大学 | Switching capacity T source inventers and modulator approach based on active clamp |
| CN108809130A (en) * | 2018-06-21 | 2018-11-13 | 西安理工大学 | The modulator approach of the sources Semi-Z single-phase inverter |
| CN109462333A (en) * | 2018-06-30 | 2019-03-12 | 华南理工大学 | A kind of source continuous input current active switch capacitor Z boost chopper |
-
2019
- 2019-04-16 CN CN201910305607.3A patent/CN109861576A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20170062243A (en) * | 2015-11-27 | 2017-06-07 | 울산대학교 산학협력단 | Power converter based on quasi z-source inverter |
| CN107612404A (en) * | 2017-10-09 | 2018-01-19 | 哈尔滨工业大学 | Γ source inventers and modulator approach based on switching capacity |
| CN107681914A (en) * | 2017-10-09 | 2018-02-09 | 哈尔滨工业大学 | Switching capacity T source inventers and modulator approach based on active clamp |
| CN108809130A (en) * | 2018-06-21 | 2018-11-13 | 西安理工大学 | The modulator approach of the sources Semi-Z single-phase inverter |
| CN109462333A (en) * | 2018-06-30 | 2019-03-12 | 华南理工大学 | A kind of source continuous input current active switch capacitor Z boost chopper |
Non-Patent Citations (1)
| Title |
|---|
| 董帅等: "Z源逆变器关键技术发展综述", 《电气工程学报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112751497A (en) * | 2019-10-30 | 2021-05-04 | 昱能科技股份有限公司 | Control method and system of three-phase grid-connected inverter and three-phase grid-connected inverter |
| CN112751497B (en) * | 2019-10-30 | 2022-03-08 | 昱能科技股份有限公司 | Control method and system of three-phase grid-connected inverter and three-phase grid-connected inverter |
| US11770065B2 (en) | 2019-10-30 | 2023-09-26 | Altenergy Power System Inc. | Control method and system for three-phase grid-connected inverter, and three-phase grid-connected inverter |
| CN114583991A (en) * | 2022-05-07 | 2022-06-03 | 深圳古瑞瓦特新能源有限公司 | Gain-adjustable single-phase DCAC converter, control method and three-phase DCAC converter |
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Application publication date: 20190607 |