CN107947617A - A kind of hybrid switch single-phase inverter - Google Patents
A kind of hybrid switch single-phase inverter Download PDFInfo
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- CN107947617A CN107947617A CN201710996473.5A CN201710996473A CN107947617A CN 107947617 A CN107947617 A CN 107947617A CN 201710996473 A CN201710996473 A CN 201710996473A CN 107947617 A CN107947617 A CN 107947617A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/505—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
- H02M7/515—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
- H02M7/521—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only in a bridge configuration
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The present invention provides a kind of hybrid switch single-phase inverter, the inverter includes：Direct voltage source；The switched current source being connected with the direct voltage source；The single-phase inversion bridge arm being connected with the switched current source；The alternating current-direct current filter circuit being connected with the single-phase inversion bridge arm；The controller being connected with the switched current source and the single-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, suitable for various single phase joining net types, off-network type and accumulation energy type inverter.
Description
Technical field
The present invention relates to Power Electronic Circuit field, more particularly to a kind of hybrid switch single-phase inverter.
Background technology
Wholly-controled device, the traditional single phases as shown in Figure 1 such as current inverter generally common IGBT, MOSFET, IGCT are inverse
Becoming device includes power switch tube S 1, S2, S3 and S4, and direct current input side is connected to filter capacitor Cin, according to device for power switching
Switch motion, exports a series of ac square-wave voltage, and maximum square wave amplitude is limited to DC input voitage.The inverter is with right
Linea angulata S1 and S4, diagonal S2 and S3 form two groups of linkage power switch, and two groups of power switch alternatings are open-minded, the result is that handing over
Flow the square-wave voltage of side output positive and negative handover, then after the ac filter circuit that inductance L1, L2 and capacitance Cout are formed it is defeated
Go out sine voltage.The specific switching sequence selection of power device, according to the difference of control purpose there are multiple control modes, such as
Square wave inversion control, sine wave pulse width modulated (SPWM) etc..Full control switching inverter mature and reliable, is widely used in new energy
Source generates electricity by way of merging two or more grid systems, uninterrupted power source, inverter and motor driving etc. occasion.
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 formed, 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 scope of two-stage type Single-Phase Voltage-Source Inverters 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 costly, open up by the power of composition
Flutter complicated, while control strategy enforcement difficulty is big, so as 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.
The content of the invention
Based on this, circuit cost height, the work efficiency that the present invention is necessary for solving conventional inverter are low with reliability
A kind of problem, there is provided hybrid switch single-phase inverter.
A kind of hybrid switch single-phase inverter, the inverter include：
Direct voltage source；
The switched current source being connected with the direct voltage source；
The single-phase inversion bridge arm being connected with the switched current source；
The alternating current-direct current filter circuit being connected with the single-phase inversion bridge arm；
The controller being connected with the switched current source and the single-phase inversion bridge arm.
In one of the embodiments, the direct voltage source includes：
Direct-current input power supplying Vdc；
The capacitance Cin in parallel with the direct-current input power supplying Vdc.
In one of the embodiments, the switched current source includes：
Full-controlled switch device Sb；
The inductance Lb being connected with the full-controlled switch device Sb.
In one of the embodiments, the single-phase inversion bridge arm includes：
The commutation circuit of half control type device for power switching S1, S2, S3 and S4 composition；
Half control type the device for power switching S1 and S2 are connected in series；
Half control type the device for power switching S3 and S4 are connected in series；
Half control type the device for power switching S1 and S2 are connected in series the rear and half control type power switch being connected in series
Device S3 and S4 are in parallel.
In one of the embodiments, the alternating current-direct current filter circuit includes：
Capacitance Co, the capacitance Co are connected with the single-phase inversion bridge arm；
The inductance unit of inductance L1 and inductance L2 compositions；The inductance unit is in parallel with the capacitance Co.
In one of the embodiments, the controller includes：
Outer voltage and current inner loop；
The outer voltage by producing 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 output modulate after obtain just
String pulse width modulated signal.
In one of the embodiments, the commutation circuit of the inverter bridge leg is full-bridge or the circuit of half-bridge form.
In one of the embodiments, the controller is Voltage loop and bicyclic work or the only voltage of electric current loop
The controller of ring or an electric current loop.
In one of the embodiments, the half control type device for power switching is silicon-controlled, thyristor or GTO, 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.
Beneficial effect：The present invention provides a kind of hybrid switch single-phase inverter, the inverter includes：DC voltage
Source；The switched current source being connected with the vertical compression current source；The single-phase inversion bridge arm being connected with the switched current source；With it is described
The alternating current-direct current filter circuit of single-phase inversion bridge arm connection；The control being connected with the switched current source and the single-phase inversion bridge arm
Device.DC input voitage is after capacitor filtering, into the Buck-Boost being made of single full-control type device for power switching
Switched current source, full-controlled switch is driven by SPWM (sine wave pulse width modulated) signal, so as to obtain SPWM electric currents, is entered
The single-phase inversion bridge arm being made of half control type device for power switching, then by inductor, capacitor ac filter after obtain just
String ripple exports.Controller realizes the functions such as the electric power detection of AC and DC side, communication, protection, while also realizes switched current source
SPWM modulation strategies, and the commutation function of inverter bridge leg.The inverter bridge leg of this novel inverter is without using full-control type power
Switching tube, without using DC bus capacitance, and can make full use of the inherent buck characteristic of switched current source.Therefore into
This lower, reliability higher, suitable for various single phase joining net types, off-network type and accumulation energy type inverter.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with
Structure according to these attached drawings obtains other attached drawings.
Fig. 1 is the circuit diagram of traditional single-stage full-controlled device single-phase inverter.
Fig. 2 is the circuit diagram of traditional twin-stage full-controlled device single-phase inverter.
Fig. 3 is the circuit diagram of the hybrid switch single-phase full-bridge inverter of the present invention.
Fig. 4 is the circuit state figure under the charging work state of the hybrid switch single-phase full-bridge inverter of the present invention.
Fig. 5 is the circuit state figure under the first electric discharge working status of the hybrid switch single-phase full-bridge inverter of the present invention.
Fig. 6 is the circuit state figure under the second electric discharge working status of the hybrid switch single-phase full-bridge inverter of the present invention.
Fig. 7 is the circuit diagram of the hybrid switch single phase half bridge inverter of the present invention.
Fig. 8 is the circuit diagram of the hybrid switch crisscross parallel single-phase full-bridge inverter of the present invention.
Fig. 9 is the circuit module block diagram of the hybrid switch single-phase full-bridge inverter of the present invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Embodiment
To make those of ordinary skill in the art that the technical problems to be solved by the invention, technical side be more clearly understood
Case and advantageous effects, below in conjunction with drawings and examples, the present invention is further elaborated.
Fig. 9, a kind of hybrid switch single-phase inverter 1 are refer to, the hybrid switch single-phase inverter 1 includes：
Direct voltage source 100；
The switched current source 200 being connected with the direct voltage source 100；
The single-phase inversion bridge arm 300 being connected with the switched current source 200；
The alternating current-direct current filter circuit 400 being connected with the single-phase inversion bridge arm 300；
The controller 500 being connected with the switched current source 200 and the single-phase inversion bridge arm 300.
Specifically, as shown in figure 9, the direct voltage source 100, switched current source 200, single-phase inversion bridge arm 300 and
The alternating current-direct current filter circuit 400 is sequentially connected.The controller 500 at the same time with the switched current source 200 and described single-phase
Inverter bridge leg 300 connects, for being controlled to the switched current source 200 and the single-phase inversion bridge arm 300.
In one of the embodiments, the direct voltage source 100 includes：
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.
In one of the embodiments, the switched current source 200 includes：
Full-controlled switch device Sb；
The inductance Lb being connected with the full-controlled switch device Sb.
In one of the embodiments, the single-phase inversion bridge arm 300 includes：
The commutation circuit of half control type device for power switching S1, S2, S3 and S4 composition；
Half control type the device for power switching S1 and S2 are connected in series；
Half control type the device for power switching S3 and S4 are connected in series；
Half control type the device for power switching S1 and S2 are connected in series the rear and half control type power switch being connected in series
Device S3 and S4 are in parallel.
It should be noted that the series arm that half control type the device for power switching S1 and S2 are connected in series, with described half
The series arm that control type device for power switching S3 and S4 are connected in series is parallel to full-control type device for power switching Sb and power supply
Between anode.
In one of the embodiments, the alternating current-direct current filter circuit 400 includes：
Capacitance Co, the capacitance Co are connected with the single-phase inversion bridge arm 300；
The inductance unit of inductance L1 and inductance L2 compositions；The inductance unit is in parallel with the capacitance Co.
Specifically, the first end of the inductance L1 and the connecting node of half control type the device for power switching S1 and S2 connect
Connect, the second end of the inductance L1 is connected with the L ends of load resistance R.The first end of the inductance L2 and the half control type power
Switching device S3 is connected with the connecting node of S4, and the second end of the inductance L2 is connected with the N-terminal of load resistance R.The capacitance
Co is connected between the first end of the inductance L1 and the first end of the inductance L2.
In one of the embodiments, the controller 500 includes：
Outer voltage and current inner loop；
The outer voltage by producing 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 output modulate after obtain just
String pulse width modulated signal.
In one of the embodiments, the commutation circuit of the inverter bridge leg is full-bridge or the circuit of half-bridge form.
In one of the embodiments, the controller is Voltage loop and bicyclic work or the only voltage of electric current loop
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.
In one of the embodiments, the half control type device for power switching is silicon-controlled, thyristor or GTO, 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 and S4.Wherein,
The cathode of the anode connection thyristor S2 of thyristor S1, the cathode of the anode connection thyristor S4 of thyristor S3, the cathode of S1 connect
Connect the cathode of S3, the anode of the anode connection S4 of S2.
In hybrid switch single-phase full-bridge inverter as shown in Figure 3, inverter is inverse by prime switched current source combination rear class
The converter circuit for becoming bridge arm is formed, and a full-control type and four half control type device for power switching are used only.Input dc power
Source Vdc is inputed to by full-control type device for power switching Sb and electricity after DC filter capacitors Cin filtering with stable direct current
Feel the switched current source that Lb is formed, switching current again by by half control type device for power switching S1, S2, S3 in inverter bridge leg and
High frequency square wave is obtained after the commutation circuit that S4 is formed, is finally filtered by output inductor device L1, L2 and capacitor Co high-frequency acs
Sinewave output is obtained after ripple.This switched current source is substantially Buck-Boost (buck) converter, therefore can be realized
Decompression or boosting output.The controller of this inverter uses double -loop control mode：Outer voltage and current inner loop.Outside voltage
Ring produces voltage error signal Vea more afterwards by output voltage sampling circuit OP, with baseline sinusoidal wave signal, then is mended through overvoltage
Current reference signal Iref is obtained after repaying device Gv, is SPWM (sine wave pulse width modulated) signal.Iref is filtered with output
Inductor current signal Io produces current error signal Iea more afterwards, after current compensator Gi, by controller internal logic
Computing is with producing control signal and being used to drive full-control type device for power switching Sb via producing after each driving circuit after processing
And the drive signal of half control type device for power switching S1, S2, S3 and S4, so as to obtain stable sine voltage output.Separately
Outside, this inverter is used for new energy photovoltaic with wind power-generating grid-connected type in application, can remove outer voltage, by sampling electricity
Phase, the frequency of road processing network voltage obtain the phase of current reference signal, frequency information, and by increased MPPT (most
The tracking of high-power point) control strategy obtains the amplitude information of current reference signal, so as to be precisely controlled the phase of grid-connected current,
Frequency and amplitude.Electric voltage feed forward, Repetitive controller scheduling algorithm can be increased in controller design, so as to further improve controlling
Energy.So as to which controller realizes the functions such as the electric power detection of AC and DC side, communication, protection, while also realize switched current source
SPWM modulation strategies, and the commutation function of inverter bridge leg.
Specifically, as shown in figure 3, the controller 500 is defeated including the first output terminal 501, the second output terminal 502 and the 3rd
Outlet 503.First output terminal 501 is connected with the full-control type device for power switching Sb, is controlled for output drive signal
The full-control type device for power switching Sb on or off.Second output terminal 502 and half control type device for power switching S1 and
S2 connections, half control type device for power switching S1 and the S2 on or off is controlled for output drive signal.Described second is defeated
Outlet 502 is connected with half control type device for power switching S3 and S4, and the half control type power switch is controlled for output drive signal
Device S3 and S4 on or off.
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 terminal, full-control type device for power switching Sb is turned in controlling switch current source, while the second output terminal
502 and the 3rd not output drive signal of output terminal 503.At this time, input DC power Vdc passes through full-control type device for power switching Sb
The storage energy to inductance Lb chargings, thus the charging current linear rise of inductor Lb, at this time output loading are filtered by output
Capacitor Co provides energy.Meanwhile during full-control type device for power switching Sb conductings, the half control type device for power switching of commutation circuit
S1, S2, S3 and S4 bear at both ends back-pressure, thus these half control type devices can realize that nature turns off.So as in charging work mould
Under state, full-control type device for power switching Sb is turned on, and four half control type device for power switching are all off.
In certain embodiments, the full-control type device for power switching Sb is low level conducting switch, and described first drives
Signal is low level signal.Described half control type device for power switching S2, S3 can be that high level conducting switchs, the half control type power
Switching device S1, S4 can be low level conducting switch.
Fig. 5 show one of electric discharge operation mode of inverter operation principle, i.e., corresponding to export just the half of sine wave
The electric discharge operation mode in week.Under the operating mode to discharge herein, controller 500 controls the first output terminal 501, the second output terminal
502 and 503 output drive signal of the 3rd output terminal, wherein, the drive signal can be high level.At this time, in switched current source
Full-control type device for power switching Sb is turned off and half control type device for power switching S2, S3 are turned in inverter bridge leg, and S1, S4 are closed, electricity
The storage energy of sensor Lb is given by half control type device for power switching S2, S3 and by L1, L2 and output filter capacitor Co
Output loading provide energy, thus the discharge stream linear decline of inductor Lb and release energy.At this time, provided for output loading
For the electric energy of sine wave positive half cycle form.
Fig. 6 show the other in which electric discharge operation mode of inverter operation principle, i.e., corresponding to export the negative of sine wave
The electric discharge operation mode of half cycle is, it is necessary to which explanation, first and second electric discharge operation mode can not coexist.In another electric discharge
Operating mode under, controller 500 controls the first output terminal 501, the second output terminal 502 and 503 output driving of the 3rd output terminal
Signal, wherein, the drive signal can be high level.In switched current source full-control type device for power switching still Sb shut-off and
S1, S4 are turned in inverter bridge leg, S2, S3 shut-off, and the storage energy of Lb is by S2, S3 and negative to output by L1, L2 and Co
Carry provide energy, thus the discharge stream linear decline of inductor Lb and release energy.At this time, sine wave is provided for output loading to bear
The electric energy of half cycle form.
In hybrid switch single phase half bridge inverter schematic diagram as shown in Figure 7, similarly, inverter is by prime switching current
Source is formed with reference to rear class converter circuit, and a full-control type device for power switching is used only, simply original four half control types
Two in device for power switching are changed to two capacitors C1 and C2.The filtered capacitor Cin filtering of input DC power Vdc
Afterwards, the switched current source being made of full-control type device for power switching Sb and energy-storage reactor Lb is inputed to stable direct current, opened
Powered-down stream after the commutation circuit that is made of half control type device for power switching S1, S2 and capacitor C1, C2 again by obtaining high frequency side
Ripple, finally by obtaining sinewave output after output inductor device L1, L2 and capacitor Co filtering.
In hybrid switch crisscross parallel single-phase full-bridge inverter schematic diagram as shown in Figure 8, similarly, inverter is by prime
Switched current source combination rear class converter circuit is formed, and mutually isostructural using four half control type device for power switching and n
Switched current source is formed, and is connected between each switched current source for crisscross parallel, and the phase to stagger between control signal is 360/
n.Interleaving and Transformer Paralleling can reduce input, output current ripple, thus can reduce input, the capacity of output capacitor.In addition, hand over
Wrong parallel-connection structure is used for new energy photovoltaic with wind power-generating grid-connected type in application, can be more by the convenient realization of this n switched current source
Road 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, can so widen input voltage range, improve the application range of inverter.Due to switched current source
It is more stable, more easy to control in the presence of, such output current from load effect, thus distort when generating electricity by way of merging two or more grid systems application in power grid
In the case of can also realize that high quality exports, while multi-machine parallel connection ability is strong, without special and machine communication signal and communication cable, carries
High system reliability.The commutation circuit of inverter bridge leg has used the half control type device such as thyristor or GTO, so can conveniently realize
Rectification, the four quadrant running of inversion, thus dispatching of power netwoks requirement is adapted to, flexibly stably 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 without using DC bus capacitance and other DC/DC converters, and direct current
The service life of capacitor is shorter, and one of weak link of power electronic product, so as to can further improve system reliability, prolong
Long service live.
The foregoing is merely the preferred embodiment of the present invention, rather than limitation in any form is done to the present invention.This area
Technical staff various equivalent changes and improvement, all institutes within the scope of the claims can be imposed on the basis of above-described embodiment
The equivalent variations done or modification, should all fall under the scope of the present invention.
Claims (10)
1. a kind of hybrid switch single-phase inverter, it is characterised in that the inverter includes：
Direct voltage source；
The switched current source being connected with the direct voltage source；
The single-phase inversion bridge arm being connected with the switched current source；
The alternating current-direct current filter circuit being connected with the single-phase inversion bridge arm；
The controller being connected with the switched current source and the single-phase inversion bridge arm.
2. inverter according to claim 1, it is characterised 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. inverter according to claim 1, it is characterised in that the switched current source includes：
Full-controlled switch device Sb；
The inductance Lb being connected with the full-controlled switch device Sb.
4. inverter according to claim 1, it is characterised in that the single-phase inversion bridge arm includes：
The commutation circuit of half control type device for power switching S1, S2, S3 and S4 composition；
Half control type the device for power switching S1 and S2 are connected in series；
Half control type the device for power switching S3 and S4 are connected in series；
Half control type the device for power switching S1 and S2 are connected in series the rear and half control type device for power switching being connected in series
S3 and S4 is in parallel.
5. inverter according to claim 1, it is characterised in that the alternating current-direct current filter circuit includes：
Capacitance Co, the capacitance Co are connected with the single-phase inversion bridge arm；
The inductance unit of inductance L1 and inductance L2 compositions；The inductance unit is in parallel with the capacitance Co.
6. inverter according to claim 1, it is characterised in that the controller includes：
Outer voltage and current inner loop；
The outer voltage is passed through by producing 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 output modulate after obtain sine wave
Pulse width modulating signal.
7. inverter according to claim 1, it is characterised in that the commutation circuit of the inverter bridge leg is full-bridge or half
The circuit of bridge form.
8. inverter according to claim 1, it is characterised in that the controller is Voltage loop and the bicyclic work of electric current loop
Work or the only controller of a Voltage loop or an electric current loop.
9. inverter according to claim 4, it is characterised in that the half control type device for power switching is silicon-controlled, brilliant
Brake tube or GTO, it is possible to use full-control type device for power switching.
10. inverter according to claim 3, it is characterised in that the full-control type device for power switching can be full-control type
Triode, MOSFET, IGCT or IGBT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710996473.5A CN107947617A (en) | 2017-10-23 | 2017-10-23 | A kind of hybrid switch single-phase inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710996473.5A CN107947617A (en) | 2017-10-23 | 2017-10-23 | A kind of hybrid switch single-phase inverter |
Publications (1)
| Publication Number | Publication Date |
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| CN107947617A true CN107947617A (en) | 2018-04-20 |
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