CN207782679U - A kind of hybrid switch three-phase inverter - Google Patents
A kind of hybrid switch three-phase inverter Download PDFInfo
- Publication number
- CN207782679U CN207782679U CN201721380937.1U CN201721380937U CN207782679U CN 207782679 U CN207782679 U CN 207782679U CN 201721380937 U CN201721380937 U CN 201721380937U CN 207782679 U CN207782679 U CN 207782679U
- Authority
- CN
- China
- Prior art keywords
- control type
- power switching
- capacitance
- phase
- hybrid switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Inverter Devices (AREA)
Abstract
The utility model provides a kind of hybrid switch three-phase inverter, and the hybrid switch three-phase inverter includes：Direct voltage source；The switched current source being connect with the direct voltage source；The three-phase inversion bridge arm being connect with the switched current source；The alternating current-direct current filter circuit being connect with the three-phase inversion bridge arm；The controller being connect with the switched current source and the three-phase inversion bridge arm.A full-control type device for power switching is used only in the application, and system cost is lower, reliability higher, is suitable for various three-phase grid types, off-network type and accumulation energy type inverter.
Description
Technical field
The utility model is related to power electronic circuit field more particularly to a kind of hybrid switch three-phase inverters.
Background technology
Wholly-controled devices, the conventional three-phases as shown in Figure 1 such as current inverter generally common IGBT, MOSFET, IGCT are inverse
It includes power switch tube S 1, S2, S3, S4, S5 and S6 to become device, and direct current input side is connected to filter capacitor Cin, according to power switch
The switch motion of device, exports a series of three-phase alternating current square-wave voltage, and maximum square wave amplitude is limited to DC input voitage.It should
Inverter can export the square-wave voltage of positive and negative handover in exchange side, be formed using inductance La, Lb, Lc and capacitance Ca, Cb, Cc
Ac filter circuit after export sine voltage.The specific switching sequence of power device selects, according to the difference of control purpose
There are multiple control modes, such as square wave inversion control, sine wave pulse width modulated (SPWM).Full control switching inverter is ripe
Reliably, it is widely used in the occasions such as new energy grid-connected power, uninterruptible power supply, inverter and motor driving.
In the case of DC input voitage is relatively low, DC/DC booster converters can be increased in the DC side of control switching inverter entirely
Two-stage type power conversion framework is constituted, as shown in Figure 2.DC/DC booster converters are generally using Boost (boosting) converters to carry
DC input voitage is risen, therefore the DC input voitage range of two-stage type three-phase voltage source inverter is wider, more convenient reality
Using being especially suitable for the low application scenario of DC input voitage.
Full-control type device for power switching is critical mainstream applications in inverter, existing SPWM inversion grid connections technology
Research is also primarily directed to full control switching inverter.The price of full-control type device for power switching is more expensive, and the power of composition is opened up
Flutter complicated, while control strategy enforcement difficulty is big, to increase the power of inverter and control circuit cost, reduce
System reliability.And half control type power switch such as thyristor constant power grade bigger, safe and reliable, moderate cost, it can attempt
For in inverter.
Utility model content
Based on this, the utility model it is necessary for the power for solving conventional inverter and control circuit is of high cost, system can
The problem low by property provides a kind of hybrid switch three-phase inverter.
A kind of hybrid switch three-phase inverter, the hybrid switch three-phase inverter include：
Direct voltage source；
The switched current source being connect with the direct voltage source；
The three-phase inversion bridge arm being connect with the switched current source；
The alternating current-direct current filter circuit being connect with the three-phase inversion bridge arm；
The controller being connect with the switched current source and the three-phase inversion bridge arm.
The direct voltage source includes in one of the embodiments,：
Direct-current input power supplying Vdc；
The capacitance Cin in parallel with the direct-current input power supplying Vdc.
The switched current source includes in one of the embodiments,：
Full-controlled switch device Sb；
The inductance Lb being connect with the full-controlled switch device Sb.
The three-phase inversion bridge arm includes in one of the embodiments,：
The commutation circuit of half control type device for power switching S1, S2, S3, S4, S5 and S6 composition；
Half control type the device for power switching S1 and S4 are connected in series with；
Half control type the device for power switching S2 and S5 are connected in series with；
Half control type the device for power switching S3 and S6 are connected in series with；
Half control type the device for power switching S1 and S4 are connected in series with rear and half control type the device for power switching S2 and S5
The device being connected in series with is in parallel；Device after being connected in series with half control type the device for power switching S3 and S6 is in parallel.
The alternating current-direct current filter circuit includes in one of the embodiments,：
The entirety that capacitance Ca, the capacitance Ca are connected in series with half control type the device for power switching S1 and S4 is simultaneously
Connection；
The entirety that capacitance Cb, the capacitance Cb are connected in series with half control type the device for power switching S2 and S5 is simultaneously
Connection；
The entirety that capacitance Cc, the capacitance Cc are connected in series with half control type the device for power switching S3 and S6 is simultaneously
Connection；
The inductance unit of inductance L1 and inductance L2, inductance L3 compositions；
In the inductance unit, the inductance L1 is in parallel with the capacitance Ca；The inductance L2 is in parallel with the capacitance Cb；
The inductance L3 is in parallel with the capacitance Cc.
The controller includes in one of the embodiments,：
Outer voltage and current inner loop；
The outer voltage by generating voltage error signal after output voltage sampling circuit and baseline sinusoidal wave signal,
Current reference signal is obtained after voltage compensator, with output current sampled signal relatively and by exporting modulated sine
Pulse width modulated signal.
The commutation circuit of the three-phase inversion bridge arm is full-bridge or the circuit of half-bridge form in one of the embodiments,.
The controller is the bicyclic work of Voltage loop and electric current loop in one of the embodiments, or only there are one voltages
The controller of ring or an electric current loop.
The half control type device for power switching is silicon-controlled, thyristor or GTO in one of the embodiments, can also be made
With full-control type device for power switching.
In one of the embodiments, the full-control type device for power switching can be the triode of full-control type, MOSFET,
IGCT or IGBT.
Advantageous effect：
The utility model provides a kind of hybrid switch three-phase inverter, and the hybrid switch three-phase inverter includes：Directly
Galvanic electricity potential source；The switched current source being connect with the direct voltage source；The three-phase inversion bridge arm being connect with the switched current source；
The alternating current-direct current filter circuit being connect with the three-phase inversion bridge arm；It is connect with the switched current source and the three-phase inversion bridge arm
Controller.DC input voitage is after capacitor filtering, into the Buck- being made of single full-control type device for power switching
Boost switched current sources, full-controlled switch are driven by SPWM (sine wave pulse width modulated) signal, to obtain SPWM electricity
Stream, into the three-phase inversion bridge arm being made of half control type device for power switching, using inductor, capacitor ac filter after
Obtain sinewave output.Controller realizes the functions such as electric power detection, communication, the protection of AC and DC side, while also realizing switch electricity
The SPWM modulation strategies in stream source and the commutation function of inverter bridge leg.The inverter bridge leg of this novel inverter without using controlling entirely
Type power switch tube without using DC bus capacitance, and can make full use of the inherent buck characteristic of switched current source.
Therefore cost is lower, reliability higher, suitable for various three-phase grid types, off-network type and accumulation energy type inverter.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, the structure that can also be shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the circuit diagram of traditional single-stage full-controlled device three-phase inverter.
Fig. 2 is the circuit diagram of traditional twin-stage full-controlled device three-phase inverter.
Fig. 3 is the circuit diagram of the hybrid switch three-phase full-bridge inverter of the utility model.
Fig. 4 is the circuit state figure under the charging work state of the hybrid switch three-phase full-bridge inverter of the utility model.
Fig. 5 is the three phase sine modulating wave oscillogram of the utility model.
Fig. 6 is the circuit state under the first electric discharge working condition of the hybrid switch three-phase full-bridge inverter of the utility model
Figure.
Fig. 7 is the circuit state under the second electric discharge working condition of the hybrid switch three-phase full-bridge inverter of the utility model
Figure.
Fig. 8 is the circuit state under the third electric discharge working condition of the hybrid switch three-phase full-bridge inverter of the utility model
Figure.
Fig. 9 is the circuit state under the 4th electric discharge working condition of the hybrid switch three-phase full-bridge inverter of the utility model
Figure.
Figure 10 is the circuit shape under the 5th electric discharge working condition of the hybrid switch three-phase full-bridge inverter of the utility model
State figure.
Figure 11 is the circuit shape under the 6th electric discharge working condition of the hybrid switch three-phase full-bridge inverter of the utility model
State figure.
Figure 12 is the circuit diagram of the hybrid switch crisscross parallel three-phase full-bridge inverter of the utility model.
Figure 13 is the circuit module block diagram of the hybrid switch three-phase full-bridge inverter of the utility model.
The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.
Specific implementation mode
To make those skilled in the art that technical problem to be solved in the utility model, skill be more clearly understood
Art scheme and advantageous effects are further elaborated the utility model below in conjunction with drawings and examples.
Figure 13, a kind of hybrid switch three-phase inverter 1 are please referred to, the hybrid switch three-phase inverter 1 includes：
Direct voltage source 100；
The switched current source 200 being connect with the direct voltage source；
The three-phase inversion bridge arm 300 being connect with the switched current source 200；
The alternating current-direct current filter circuit 400 being connect with the three-phase inversion bridge arm 300；
The controller 500 being connect with the switched current source 200 and the three-phase inversion bridge arm 300.
Specifically, as shown in figure 13, the direct voltage source, switched current source, three-phase inversion bridge arm and the friendship are straight
Stream filter circuit is sequentially connected.The controller is connect with the switched current source and the three-phase inversion bridge arm simultaneously, is used for
The switched current source and the three-phase inversion bridge arm are controlled.
The direct voltage source 100 includes in one of the embodiments,：
Direct-current input power supplying Vdc；
The capacitance Cin in parallel with the direct-current input power supplying Vdc.
It should be noted that the direct-current input power supplying Vdc and capacitance Cin is parallel to the positive negative electricity of direct voltage source
Pole both ends.
The switched current source 200 includes in one of the embodiments,：
Full-controlled switch device Sb；
The inductance Lb being connect with the full-controlled switch device Sb.
The three-phase inversion bridge arm 300 includes in one of the embodiments,：
The commutation circuit of half control type device for power switching S1, S2, S3, S4, S5 and S6 composition；
Half control type the device for power switching S1 and S4 are connected in series with；
Half control type the device for power switching S2 and S5 are connected in series with；
Half control type the device for power switching S3 and S6 are connected in series with；
Half control type the device for power switching S1 and S4 are connected in series with rear and half control type the device for power switching S2 and S5
The device being connected in series with is in parallel；Device after being connected in series with half control type the device for power switching S3 and S6 is in parallel.
It should be noted that after half control type the device for power switching S1 and S4 are connected in series with, with the half control type power
One end of switching device S2 and S5 are parallel to full-control type device for power switching Sb, and one end is parallel to the cathode of power supply；The half control
After type device for power switching S3 and S6 are connected in series with, the device after being connected in series with half control type the device for power switching S1 and S4
It is in parallel.
The alternating current-direct current filter circuit 400 includes in one of the embodiments,：
The entirety that capacitance Ca, the capacitance Ca are connected in series with half control type the device for power switching S1 and S4 is simultaneously
Connection；
The entirety that capacitance Cb, the capacitance Cb are connected in series with half control type the device for power switching S2 and S5 is simultaneously
Connection；
The entirety that capacitance Cc, the capacitance Cc are connected in series with half control type the device for power switching S3 and S6 is simultaneously
Connection；
The inductance unit of inductance L1 and inductance L2, inductance L3 compositions；
In the inductance unit, the inductance L1 is in parallel with the capacitance Ca；The inductance L2 is in parallel with the capacitance Cb；
The inductance L3 is in parallel with the capacitance Cc.
It should be noted that the inductance unit is parallel to the ends L of resistance unit R in one end of the capacitance Co, it is another
End is parallel to the N-terminal of resistance R.
The controller includes in one of the embodiments,：
Outer voltage and current inner loop；
The outer voltage by generating voltage error signal after output voltage sampling circuit and baseline sinusoidal wave signal,
Current reference signal is obtained after voltage compensator, with output current sampled signal relatively and by exporting modulated sine
Pulse width modulated signal.
The commutation circuit of the three-phase inversion bridge arm is full-bridge or the circuit of half-bridge form in one of the embodiments,.
The controller is the bicyclic work of Voltage loop and electric current loop in one of the embodiments, or only there are one voltages
The controller of ring or an electric current loop.
In one of the embodiments, the full-control type device for power switching can be the triode of full-control type, MOSFET,
IGCT or IGBT.
In the present embodiment, specifically, the full-control type device for power switching can be IGBT, including an a Sb and diode Db
And inductance Lb, which connects the direct-current input power supplying, the other end connects one end of the inductance Lb.
The half control type device for power switching is silicon-controlled, thyristor or GTO in one of the embodiments, can also be made
With full-control type device for power switching.
In the present embodiment, specifically, the half control type device for power switching can be thyristor S1, S2, S3, S4, S5 and S6,
Wherein, the cathode of the anode connection thyristor S4 of thyristor S1, the cathode of the anode connection thyristor S5 of thyristor S2, thyristor
The cathode of the anode connection thyristor S6 of S3, the cathode of S1, S2, S3 link together, and the anode of S4, S5, S6 link together.
In hybrid switch three-phase full-bridge inverter as shown in Figure 3 and its control schematic diagram, inverter switchs electricity by prime
Stream source combines the converter circuit of rear class inverter bridge leg to constitute, and a full-control type and six half control type power switch are used only
Device.Input DC power Vdc is inputed to stable direct current by full-control type work(after DC filter capacitors Cin filtering
The switched current source that rate switching device Sb and inductance Lb are constituted, switching current is again by by half control type power switch in inverter bridge leg
Obtain high frequency square wave after the commutation circuit that device S1, S2, S3, S4, S5 and S6 is constituted, finally by output inductor device L1,
Sinewave output is obtained after L2, L3 and the filtering of capacitor Ca, Cb, Cc high-frequency ac.This switched current source is substantially Buck-
Boost (buck) converter, therefore can realize decompression or boosting output.The controller of this inverter uses double -loop control
Mode：Outer voltage and current inner loop.Outer voltage by output voltage sampling circuit, with generated after baseline sinusoidal wave signal
Voltage error signal, using obtaining current reference signal, as SPWM (sine wave pulse width modulated) after voltage compensator
Signal.Current error signal is generated after current reference signal and output inductor device current signal, by current compensation
After device, by generating control signal after the operation of controller internal logic and processing and being generated via after each driving circuit for driving
The drive signal of Sb, S1, S2, S3, S4, S5 and S6, to obtain stable sine voltage output.In addition, this inverter
For new energy photovoltaic and wind power-generating grid-connected type in application, outer voltage can be removed, power grid electricity is handled by sample circuit
Phase, the frequency of pressure obtain the phase of current reference signal, frequency information, and by increased MPPT (MPPT maximum power point tracking)
Control strategy obtains the amplitude information of current reference signal, so as to be precisely controlled the phase, frequency and amplitude of grid-connected current.
Electric voltage feed forward, Repetitive controller scheduling algorithm can be increased in controller design, control performance can be improved.To which controller realization is cross, straight
The functions such as electric power detection, communication, the protection of side are flowed, while also realizing the SPWM modulation strategies and inverter bridge of switched current source
The commutation function of arm.
Specifically, as shown in figure 3, the controller 500 is defeated including the first output end 501, second output terminal 502, third
Outlet 503 and the 4th output end 504.First output end 501 is connect with the full-control type device for power switching Sb, for defeated
Go out drive signal and controls the full-control type device for power switching Sb on or off.The second output terminal 502 and half control type work(
Rate switching device S1 and S4 connection controls half control type device for power switching S1 and the S4 conducting for output drive signal or closes
It is disconnected.The third output end 503 is connect with half control type device for power switching S2 and S5, for output drive signal control described half
Control type device for power switching S2 and S5 on or off.4th output end 504 and half control type device for power switching S3 and S6
Connection controls half control type device for power switching S3 and the S6 on or off for output drive signal.
Fig. 4 show the charging work mode of inverter operation principle, and under charge mode, controller passes through first
501 output drive signal of output end, and second output terminal 502, third output end 503 and the 4th output end 504 not output driving
Signal.At this point, controlling full-control type device for power switching Sb conductings in switched current source, and six half controls by the first drive signal
Type device for power switching is all off, and input DC power Vdc is by full-control type device for power switching Sb charges to inductance Lb
Storage energy, thus the charging current linear rise of inductor Lb, output loading at this time is by output filter capacitor Ca, Cb, Cc
Energy is provided.Meanwhile when the Sb conductings of full-control type device for power switching, the both ends S1, S2, S3, S4, S5 and S6 of commutation circuit are held
By back-pressure, to which under charging work mode, full-control type device for power switching Sb is connected, six half control type device for power switching
It is all off.
In some embodiments, the full-control type device for power switching Sb is low level conducting switch, first driving
Signal is low level signal.Described half control type device for power switching S1, S2, S3 can be high level conducting switch, the half control type
Device for power switching S4, S5, S6 can be low level conducting switch.
Fig. 5 show three phase sine modulating wave, its waveform is divided into 1-6 region in one cycle.If A, B, C tri-
The phase voltage of phase is respectively uA, uB, uC, and electric current is respectively iA, iB, iC, is pros with the direction of current direction output loading side
To.The two half control type device for power switching conductings of inverter commutation circuit each moment are set, thus for the regions 1+2,
The highest uA of phase voltage instantaneous value and the minimum uC of instantaneous value are selected, at this time uA>UC, when full-control type device for power switching Sb is turned off
When, the half control type device for power switching of corresponding triggering and conducting is A phase down tube S3 and C phase down tube S4, and iA at this time can be obtained>0.Together
Reason, in the regions 3+4, uB at this time>UA, when Sb is turned off, the half control type device for power switching of corresponding triggering is S1 and S5, can be obtained
To iB at this time>0.The rest may be inferred, obtains the decision rule of half control type device for power switching S1~S6 triggering and conductings.Therefore, it is carried
Tradition SPWM control strategies, the kernel software algorithm of device in order to control described above can be used in the inverter gone out.
Fig. 6 show the 1st electric discharge operation mode of inverter operation principle, corresponds to the regions 1+2, at this time uA>uC、iA>
0.When specific implementation, under the operating mode to discharge herein, the control of controller 500 passes through the first output end 501, the 4th output end
504 and second output terminal export drive signal.Wherein, the not output drive signal at this time of the third output end 503.Wherein,
The drive signal is high level.At this point, in switched current source full-control type device for power switching Sb shutdowns and half in inverter bridge leg
Control type device for power switching S3, S4 conducting, S1, S2, S5 and S6 are closed, and the storage energy of inductor Lb is opened by half control type power
It closes device S3, S4 and provides energy, thus electricity to output loading by inductor L1, L3 and output filter capacitor Ca, Cc
The discharge stream linear decline of sensor Lb and release energy, while B phase load energy is provided by Cb.
Fig. 7 show the 2nd electric discharge operation mode of inverter operation principle, corresponds to the regions 3+4, at this time uB>uA、iB>
0.Under the operation mode to discharge at second, controller 500 controls the first output end 501, second output terminal 502 and third output
503 output drive signals are held, and control the 4th output end 504 not output drive signal.At this point, in switched current source Sb shutdown,
And S1, S5 are connected in inverter bridge leg, the storage energy of inductor Lb is by half control type device for power switching S1, S5 and by electricity
Sensor L1, L2 and capacitor Ca, Cb give output loading to provide energy, thus the discharge stream linear decline of inductor Lb and discharge
Energy, while C phase loads energy is provided by capacitor Cc.
Fig. 8 show the 3rd electric discharge operation mode of inverter operation principle, corresponds to the regions 5+6, at this time uC>uB、iC>
0.Under the operation mode of third electric discharge, controller 500 controls the first output end 501, the output of third output end 503 and the 4th
504 output drive signal of output end, and control the not output drive signal of second output terminal 502.At this point, half control in switched current source
Type device for power switching Sb is turned off and half control type device for power switching S2, S6 is connected in inverter bridge leg, the storage energy of inductor Lb
Amount is provided by half control type device for power switching S2, S6 and by inductor L2, L3 and capacitor Cb, Cc to output loading
Energy, thus the discharge stream linear decline of inductor Lb and release energy, while A phase load energy is provided by Ca.
Fig. 9 show the 4th electric discharge operation mode of inverter operation principle, corresponds to the regions 6+1, at this time uA>uB、iB<
0.Under the operation mode to discharge at the 4th, controller 500 controls the first output end 501, third output end 503 and second exports
502 output drive signals are held, and control the 4th output end 504 not output drive signal.At this point, in switched current source Sb shutdown,
And half control type device for power switching S2, S4 is connected in inverter bridge leg, the storage energy of Lb by half control type device for power switching S2,
S4 and process inductor L1, L2 and capacitor Ca, Cb give output loading offer energy, thus the electric discharge streamline of inductor Lb
Property decline and release energy, while C phase loads energy is provided by capacitor Cc.
Figure 10 show the 5th electric discharge operation mode of inverter operation principle, corresponds to the regions 2+3, at this time uB>uC、iC<
0.Under the operating mode to discharge at the 5th, controller 500 controls the first output end 501, the 4th output end 504 and third output
503 output drive signals are held, and control the not output drive signal of second output terminal 502.At this point, in switched current source Sb shutdown,
And half control type device for power switching S3, S5 is connected in inverter bridge leg, the storage energy of inductor Lb passes through half control type power switch
Device S3, S5 and output loading is given to provide energy by inductor L2, L3 and capacitor Cb, Cc, thus inductor Lb is put
Electric current linear decline and release energy, while A phase load energy is provided by Ca.
Figure 11 show the 6th electric discharge operation mode of inverter operation principle, corresponds to the regions 2+3, at this time uC>uA、iA<
0.Under the operating mode to discharge at the 6th, controller 500 controls the first output end 501, second output terminal 502 and the 4th exports
504 output drive signals, i.e. low level signal are held, the not output drive signal of third output end 503 is controlled.At this point, switching current
Sb is turned off in source and half control type device for power switching S1, S6 is connected in inverter bridge leg, and the storage energy of Lb passes through half control type power
Switching device S1, S6 and process inductor L1, L3 and capacitor Ca, Cc give output loading offer energy, thus inductor Lb
Discharge stream linear decline and release energy, while B phase load energy is provided by Cb.
Phase voltage state is the necessary condition of half controllable type device for power switching conducting, i.e. phase voltage in figure 6 above~11
When condition meets, corresponding half controllable type device for power switching S1~S6 is not necessarily connected, this is because the same area exists
The triggering and conducting of multiple phase voltage conditions, S1~S6 has multiple choices.Such as there are common regions with region 1+6 by region 1+2
1, the region inverter bridge leg conducting there are two kinds of situations, i.e. S3, S4 conducting and S2, S4 conducting, at this moment will in conjunction with carrier wave with
The comparison result of modulation wave signal is to judge which device needs to be connected, to illustrate that half controllable type power is opened in this inverter
The triggering and conducting for closing device has higher flexibility, therefore can use different control strategies.
In hybrid switch crisscross parallel three-phase full-bridge inverter schematic diagram as shown in figure 12, similarly, inverter is by preceding
Grade switched current source combination rear class converter circuit is constituted, and uses six half control type device for power switching and n identical structures
Switched current source constitute, connected for crisscross parallel between each switched current source, controlling the phase being staggered between signal is
360/n.Interleaving and Transformer Paralleling can reduce input, output current ripple, thus can reduce input, output capacitor capacity.Separately
Outside, Interleaving and Transformer Paralleling is used for new energy photovoltaic with wind power-generating grid-connected type in application, can facilitate reality by this n switched current source
Existing multichannel MPPT functions.Detailed operation principle is similar to Fig. 3, and explanation is not repeated herein.
From the foregoing it will be appreciated that prime switched current source is substantially an One Buck-Boost converter body, this converter has
Inherent buck characteristic, the application range that can be widened input voltage range in this way, improve inverter.Due to switched current source
In the presence of such output current is more stable, more easy to control not by load effect, thus distorts in power grid when generating electricity by way of merging two or more grid systems application
In the case of can also realize that high quality exports, while multi-machine parallel connection ability is strong, is not necessarily to special and machine communication signal and communication cable, carries
High system reliability.The commutation circuit of inverter bridge leg has used the half controls type device such as thyristor or GTO, can facilitate realization in this way
The four quadrant running of rectification, inversion, thus dispatching of power netwoks requirement is adapted to, flexibly steadily realize active drop volume, Reactive-power control etc..
Software control is directly with output current object in order to control in controller, thus current harmonics is lower, can in real time, rapidly realize
Overcurrent protection.In addition, the inverter that is proposed and DC bus capacitance and other DC/DC converters are not used, and direct current
The service life of capacitor is shorter and one of the weak link of power electronic product, to can further improve system reliability, prolong
Long service live.
The above is only the preferred embodiment of the present invention, rather than does limit in any form to the utility model
System.Those skilled in the art can impose various equivalent changes and improvement on the basis of the above embodiments, all to be wanted in right
The equivalent variations done in range or modification are asked, should fall within the protection scope of this utility model.
Claims (10)
1. a kind of hybrid switch three-phase inverter, which is characterized in that the hybrid switch three-phase inverter includes：
Direct voltage source；
The switched current source being connect with the direct voltage source；
The three-phase inversion bridge arm being connect with the switched current source；
The alternating current-direct current filter circuit being connect with the three-phase inversion bridge arm；
The controller being connect with switched current source and the three-phase inversion bridge arm.
2. hybrid switch three-phase inverter according to claim 1, which is characterized in that the direct voltage source includes：
Direct-current input power supplying Vdc；
The capacitance Cin in parallel with the direct-current input power supplying Vdc.
3. hybrid switch three-phase inverter according to claim 1, which is characterized in that the switched current source includes：
Full-controlled switch device Sb；
The inductance Lb being connect with the full-controlled switch device Sb.
4. hybrid switch three-phase inverter according to claim 1, which is characterized in that the three-phase inversion bridge arm includes：
The commutation circuit of half control type device for power switching S1, S2, S3, S4, S5 and S6 composition；
Half control type the device for power switching S1 and S4 are connected in series with；
Half control type the device for power switching S2 and S5 are connected in series with；
Half control type the device for power switching S3 and S6 are connected in series with；
Half control type the device for power switching S1 and S4 connect after being connected in series with half control type the device for power switching S2 and S5
The device of connection is in parallel；Device after being connected in series with half control type the device for power switching S3 and S6 is in parallel.
5. hybrid switch three-phase inverter according to claim 4, which is characterized in that the alternating current-direct current filter circuit packet
It includes：
Capacitance Ca, the capacitance Ca are connected in series with whole in parallel with half control type the device for power switching S1 and S4；
Capacitance Cb, the capacitance Cb are connected in series with whole in parallel with half control type the device for power switching S2 and S5；
Capacitance Cc, the capacitance Cc are connected in series with whole in parallel with half control type the device for power switching S3 and S6；
The inductance unit of inductance L1 and inductance L2, inductance L3 compositions；
In the inductance unit, the inductance L1 is in parallel with the capacitance Ca；The inductance L2 is in parallel with the capacitance Cb；It is described
Inductance L3 is in parallel with the capacitance Cc.
6. hybrid switch three-phase inverter according to claim 1, which is characterized in that the controller includes：
Outer voltage and current inner loop；
The outer voltage is passed through by generating voltage error signal after output voltage sampling circuit and baseline sinusoidal wave signal
Current reference signal is obtained after voltage compensator, and relatively and after output is modulated sine wave is obtained with output current sampled signal
Pulse width modulating signal.
7. hybrid switch three-phase inverter according to claim 1, which is characterized in that the commutation of the three-phase inversion bridge arm
Circuit is full-bridge or the circuit of half-bridge form.
8. hybrid switch three-phase inverter according to claim 1, which is characterized in that the controller is Voltage loop and electricity
It flows the bicyclic work of ring or only there are one Voltage loop or the controllers of an electric current loop.
9. hybrid switch three-phase inverter according to claim 4, which is characterized in that the half control type device for power switching
For silicon-controlled, thyristor or GTO, it is possible to use full-control type device for power switching.
10. hybrid switch three-phase inverter according to claim 9, which is characterized in that the full-control type power switch device
Part can be triode, MOSFET, IGCT or IGBT of full-control type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721380937.1U CN207782679U (en) | 2017-10-23 | 2017-10-23 | A kind of hybrid switch three-phase inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721380937.1U CN207782679U (en) | 2017-10-23 | 2017-10-23 | A kind of hybrid switch three-phase inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207782679U true CN207782679U (en) | 2018-08-28 |
Family
ID=63218583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721380937.1U Expired - Fee Related CN207782679U (en) | 2017-10-23 | 2017-10-23 | A kind of hybrid switch three-phase inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207782679U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107749720A (en) * | 2017-10-23 | 2018-03-02 | 胡炎申 | A kind of hybrid switch three-phase inverter |
-
2017
- 2017-10-23 CN CN201721380937.1U patent/CN207782679U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107749720A (en) * | 2017-10-23 | 2018-03-02 | 胡炎申 | A kind of hybrid switch three-phase inverter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9450502B2 (en) | Direct power conversion device and method for controlling direct power conversion device | |
| CN105471238A (en) | Direct current bus voltage ripple compensating method and photovoltaic inverter | |
| CN103887955A (en) | Grid-connected inverter for low-frequency current ripple output restraining of fuel cell and control device | |
| CN105490306A (en) | Photovoltaic energy storage grid-connected power supply system | |
| CN102856916A (en) | Reactive power control method and circuit of single-phase photovoltaic inverter | |
| CN103283135A (en) | Electric power converter | |
| CN102624016B (en) | Bidirectional energy flowing flow battery energy storage grid connection device and control method thereof | |
| CN102005772B (en) | Network combination inversion system and control method thereof | |
| CN102570488B (en) | Power conversion system based on energy storage of lithium battery and control method thereof | |
| CN111478573A (en) | Power factor adjusting framework suitable for single-phase and three-phase power grid and control method thereof | |
| CN204103796U (en) | Photovoltaic DC-to-AC converter and PV air-conditioner system | |
| CN108683247A (en) | A kind of uninterruptible power system and method for hybrid fuel cell and ultracapacitor | |
| CN103580048A (en) | Chained battery energy storage system integrated with active power filter | |
| CN113489326A (en) | Two-stage DC/AC bidirectional conversion device applied to energy router | |
| Ohnuma et al. | A control method for a single-to-three-phase power converter with an active buffer and a charge circuit | |
| Burlaka et al. | Bidirectional single stage isolated DC-AC converter | |
| CN207442715U (en) | A kind of hybrid switch single-phase inverter | |
| CN104796019B (en) | A kind of Z sources three-level PWM rectifier and its control method | |
| CN100377481C (en) | Integration converton with three phase power factor correction | |
| CN104092438A (en) | Photovoltaic energy storage system | |
| CN106357139A (en) | Efficient light-storing combined self-feeding type energy-storing converter | |
| CN109951098A (en) | One kind quickly isolating breaker and its control algolithm | |
| Li et al. | Novel zeta-mode three-level ac direct converter | |
| CN207782679U (en) | A kind of hybrid switch three-phase inverter | |
| Zhang et al. | Three-Level PWM rectifier based high efficiency batteries charger for EV |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180828 Termination date: 20191023 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |