CN106655866A - High-frequency chain-based single-stage type inverter - Google Patents
High-frequency chain-based single-stage type inverter Download PDFInfo
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- CN106655866A CN106655866A CN201611219062.7A CN201611219062A CN106655866A CN 106655866 A CN106655866 A CN 106655866A CN 201611219062 A CN201611219062 A CN 201611219062A CN 106655866 A CN106655866 A CN 106655866A
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Classifications
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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
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from AC input or output
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- Inverter Devices (AREA)
Abstract
The invention provides a high-frequency chain-based single-stage type inverter. The single-stage type inverter comprises a preceding-stage high-frequency chain inversion circuit, a high-frequency isolation transformer, a backward-stage absorption circuit, a backward-stage inversion circuit, and an output filtering circuit which are connected in sequence. Due to relatively small number of conversion stages of the single-stage type inverter, the magnetic core utilization rate of the high-frequency isolation transformer and system efficiency are improved, electrical isolation of the converter is realized, and output filtering wave size and weight are lowered.
Description
Technical field
The present invention relates to converters, and in particular to a kind of single stage type inverter based on High Frequency Link.
Background technology
Converters are the transformation of electrical energy dresses consisted of specific combination using device for power switching
Put, be broadly divided into AC-DC, direct current and become alternating current and direct current inversion of direct current, exchange change four big class of exchange.Wherein direct current is changed
Converter for alternating current is referred to as inverter, and with the development of Power Electronic Technique, inverter is used as a kind of device for converting electric energy
It is widely used to the fields such as Aero-Space, track traffic, sensing heating, grid-connected power generation system.
Inverter is classified according to the series of power conversion, can be divided into single stage type conversion and multi-stag converts two kinds of topology sides
Case；Single stage type inverter only has one-level energy to change, therefore relative to multi-stag conversion, single stage type inverter has circuit letter
The advantages of single, reliability height and efficiently low-power consumption.According to whether the type containing transformer and its transformer, can be divided into without change
Depressor type, Industrial Frequency Transformer type and high-frequency isolation transformer type, without electrical isolation between inverter without transformer input and output.
At present commonly used inverter is multi-level inverter, Industrial Frequency Transformer type inverter and inverter without transformer, therefore
The shortcomings of there is high loss or big volume.
The content of the invention
The technical problem to be solved in the present invention is：A kind of single stage type inverter based on High Frequency Link is provided, be which raises inverse
Become the magnetic core utilization rate of device, reduce the volume of inverter.
What the solution of the present invention was realized in：A kind of single stage type inverter based on High Frequency Link, including connecting successively
Preceding stage high frequency link inverter circuit, high-frequency isolation transformer, rear class absorbing circuit, rear class inverter circuit and the output filtered electrical for connecing
Road, wherein,
The preceding stage high frequency inverter circuit is converted to dc source after high-frequency alternating current, is transferred to high-frequency isolation transformer
Primary side winding；Preferably, the dutycycle of the high-frequency alternating current is between 0.01-0.99, also, when high-frequency alternating current
When dutycycle is 0.5, its conversion efficiency highest.
The high-frequency isolation transformer is by primary side winding high frequency voltage with no-load voltage ratio as 1：The mode of N is transferred to high-frequency isolation change
Two vice-side windings of depressor, produce high-frequency electrical of the two-way with width homophase；
The rear class absorbing circuit is connected across between two vice-side windings of the high-frequency isolation transformer, is become for absorbing
Depressor spike and give rear class inverter circuit provide afterflow passage；
The rear class inverter circuit is converted to the high-frequency alternating current of two vice-side windings of the high-frequency isolation transformer
SPWM alternating currents, and it is transferred to output filter circuit；
It is load supplying after the output filter circuit is filtered in SPWM alternating currents.
Another technical scheme of the present invention is that the preceding stage high frequency link inverter circuit includes first on above-mentioned basis
Switching tube (S1), second switch pipe (S2), the 3rd switching tube (S3) and the 4th switching tube (S4)；First switch pipe (S1) and second
Switching tube (S2) constitutes a half-bridge, and the 3rd switching tube (S3) constitutes a half-bridge with the 4th switching tube (S4)；First switch pipe
(S1) it is identical with the drive signal of the 4th switching tube (S4), the drive signal phase of second switch pipe (S2) and the 3rd switching tube (S3)
Together, first switch pipe (S1) drive signal is complementary with second switch pipe (S2) drive signal.Preferably, the drive signal
Dutycycle be 0.01-0.99 between, also, when drive signal dutycycle be 0.5 when, the preceding stage high frequency link inverter circuit
Conversion efficiency highest.
Another technical scheme of the present invention is the first switch pipe (S1), second switch pipe on above-mentioned basis
(S2), the 3rd switching tube (S3) and the 4th switching tube (S4) are constituted by IGBT and with its antiparallel diode, wherein diode
Anode be connected with the emitter stage of IGBT, the negative electrode of diode is connected with the colelctor electrode of IGBT.
Another technical scheme of the present invention is the colelctor electrode of the first switch pipe (S1), the on above-mentioned basis
The colelctor electrode of three switching tubes (S3) is connected with the positive pole of dc source, and the emitter stage of the second switch pipe (S2), the 4th open
The emitter stage for closing pipe (S4) is connected with the negative pole of dc source.
Another technical scheme of the present invention is that the high-frequency isolation transformer includes the first former limit on above-mentioned basis
Winding (N1), the first vice-side winding (N2) and the second vice-side winding (N3), first primary side winding (N1) and the first secondary around
The turn ratio and the first primary side winding (N1) of group (N2) is identical with the turn ratio of the second vice-side winding (N3).
Another technical scheme of the present invention be on above-mentioned basis, the first former limit of the high-frequency isolation transformer around
The Same Name of Ends of group (N1) is connected with the emitter stage of the 3rd switching tube (S3) and the colelctor electrode of the 4th switching tube (S4), described
The emitter stage and second switch of the different name end of the first primary side winding N1 of high-frequency isolation transformer and the first switch pipe (S1)
The colelctor electrode of pipe (S2) is connected.
Another technical scheme of the present invention is that the rear class absorbing circuit includes the 5th switching tube on above-mentioned basis
(S5), the 6th switching tube (S6), the first diode (D1), the first electric capacity (C1), the second electric capacity (C2), the 3rd electric capacity (C3) and
Four electric capacity (C4)；The emitter stage of the 6th switching tube (S6), one end of the first electric capacity (C1) and the first vice-side winding (N2)
Same Name of Ends is connected, the other end of the first electric capacity (C1), one end of the second electric capacity (C2) and the second vice-side winding (N3) it is of the same name
End is connected, and the colelctor electrode of the other end of the second electric capacity (C2) and the 5th switching tube (S5) is connected, the 5th switching tube (S5)
Emitter stage, the anode of the first diode (D1), one end of the 3rd electric capacity (C3) are connected with the different name end of the second vice-side winding (N3)
Connect, the other end of the 3rd electric capacity (C3), one end of the 4th electric capacity (C4) are connected with the different name end of the first vice-side winding (N2), the
The colelctor electrode of the other end, the negative electrode of the first diode (D1) and the 6th switching tube (S6) of four electric capacity (C4) is connected.
Another technical scheme of the present invention is that the rear class inverter circuit includes the 7th switching tube on above-mentioned basis
(S7), the 8th switching tube (S8), the 9th switching tube (S9) and the tenth switching tube (S10)；7th switching tube (S5) and the 8th
Switching tube (S8) constitutes a half-bridge；9th switching tube (S9) and the tenth switching tube (S10) constitute a half-bridge；Described
The emitter stage of seven switching tubes (S7) is connected with the different name end of the first vice-side winding (N2), the current collection of the 7th switching tube (S7)
Pole is connected with the emitter stage of the 8th switching tube (S8), the colelctor electrode and the second vice-side winding (N3) of the 8th switching tube (S8)
Same Name of Ends be connected, the colelctor electrode of the 9th switching tube (S9) is connected with the different name end of the second vice-side winding (N3), institute
The emitter stage for stating the 9th switching tube (S9) is connected with the colelctor electrode of the tenth switching tube (S10), the tenth switching tube (S10)
Emitter stage is connected with the Same Name of Ends of the first vice-side winding (N2), wherein the drive of the 7th switching tube (S7) and the tenth switching tube
Dynamic signal is identical (S10), and the 8th switching tube (S8) is identical with the drive signal of the 9th switching tube (S9).
Another technical scheme of the present invention is the 5th switching tube (S5) and the 6th switching tube on above-mentioned basis
(S6) it is made up of IGBT and anti-paralleled diode, wherein the anode of diode is connected with the emitter stage of IGBT, the negative electrode of diode
It is connected with the colelctor electrode of IGBT；Or, the 7th switching tube (S7), the 8th switching tube (S8), the 9th switching tube (S9) and
Ten switching tubes (S10) are made up of IGBT and anti-paralleled diode, and wherein the anode of diode is connected with the emitter stage of IGBT, two poles
The negative electrode of pipe is connected with the colelctor electrode of IGBT.
Another technical scheme of the present invention is that on above-mentioned basis, the output filter circuit includes output filtered electrical
Sense (Lf) and output filter capacitor (Cf), one end of the output inductor (Lf) and the emitter stage of the 9th switching tube (S9) and
The colelctor electrode of the tenth switching tube (S10) is connected, the other end and the output filter capacitor (Cf) of the output inductor (Lf)
One end connection, the emitter stage and the 7th switching tube (S7) of the other end of the output filter capacitor and the 8th switching tube (S8)
Colelctor electrode is connected.
Beneficial effects of the present invention：
Single stage type inverter based on High Frequency Link of the present invention, it includes the preceding stage high frequency link inversion electricity being sequentially connected
Road, high-frequency isolation transformer, rear class absorbing circuit, rear class inverter circuit and output filter circuit.The single stage type inverter turns
Change that series is less, improve the magnetic core utilization rate and system effectiveness of high-frequency isolation transformer, realize the electrical isolation of converter,
Reduce output filtering volume and weight.
Description of the drawings
The accompanying drawing for constituting the part of the present invention is used for providing a further understanding of the present invention, the schematic reality of the present invention
Apply example and its illustrate, for explaining the present invention, not constituting inappropriate limitation of the present invention.
The circuit topological structure figure of the single stage type inverter that Fig. 1 is related to for one embodiment of the present invention；
Fig. 2 and Fig. 3 is rear class equivalent circuit diagram of Fig. 1 medium-high frequencies isolating transformer under different conditions.
In figure：
The rear class absorbing circuit of 1 preceding stage high frequency inverter circuit, 2 high-frequency isolation transformer 3
The output filter circuit of 4 rear class inverter wing 5
Specific embodiment
Describe the present invention below in conjunction with the accompanying drawings, the description of this part is only exemplary and explanatory, should not
There is any restriction effect to protection scope of the present invention.Additionally, description of the those skilled in the art according to presents, can be right
Feature in presents in embodiment and in different embodiments carries out respective combination.
Term " first ", " second ", " the 3rd " " in description and claims of this specification and above-mentioned accompanying drawing
Four " etc. (if present) is the object for distinguishing similar, without for describing specific order or precedence.Should manage
The data that solution is so used can be exchanged in the appropriate case, so as to embodiments of the invention described herein, for example can be with
Order in addition to those for illustrating here or describing is implemented.Additionally, term " comprising " and " having " and they appoint
What deforms, it is intended that cover it is non-exclusive includes, for example, contain the process of series of steps or unit, method, system,
Product or equipment are not necessarily limited to those steps clearly listed or unit, but may include clearly not list or for
Other intrinsic steps of these processes, method, product or equipment or unit.
The embodiment of the present invention is as follows, refers to Fig. 1 and Fig. 2, a kind of single stage type inverter based on High Frequency Link, including successively
The preceding stage high frequency link inverter circuit 1 of connection, high-frequency isolation transformer 2, rear class absorbing circuit 3, rear class inverter circuit 4 and output filter
5 five parts of wave circuit.
The preceding stage high frequency inverter circuit 1 includes the single-phase full bridge inversion knot of four switching tube S1, S2, S3 and S4 compositions
Structure, is powered from dc source to prime high-frequency inverter circuit 1；High-frequency isolation transformer 2 includes the first primary side winding N1, first secondary
The structure in single former limit two-pack that winding N2 and the second vice-side winding N3 is constituted；Rear class absorbing circuit 3 includes electric capacity C1, electric capacity
C2, electric capacity C3, electric capacity C4, switching tube S5 and switching tube S6；Rear class inverse cascade circuit 4 include four switching tubes S7, S8, S9 and
The single-phase full bridge formula structure of S10 compositions；Output filter circuit 5 includes the LC filter constructions that inductance Lf and electric capacity Cf is constituted.
Single stage type inverter based on High Frequency Link of the present invention, wherein, each switching tube can be by IGBT and inverse parallel
Diode is constituted, and wherein the anode of diode is connected with the emitter stage of IGBT, and the negative electrode of diode is connected with the colelctor electrode of IGBT.
The colelctor electrode of switching tube S1, the colelctor electrode of switching tube S3 are connected with the positive pole of DC power source unit, the emitter stage of switching tube S2,
The emitter stage of switching tube S4 is connected with the negative pole of DC power source unit.First primary side winding N1 of the high-frequency isolation transformer
Same Name of Ends is connected with the emitter stage of switching tube S3 and the colelctor electrode of switching tube S4, the first primary side winding of high-frequency isolation transformer
N1 different names end is connected with the emitter stage of switching tube S1 and the colelctor electrode of switching tube S2；The emitter stage of switching tube S6, switching tube S10
Emitter stage, one end of electric capacity C1 be connected with the Same Name of Ends of the first vice-side winding N2, the other end of electric capacity C1 and electric capacity C2's
The Same Name of Ends of one end, the colelctor electrode of switching tube S8 and the second vice-side winding N3 is connected, the other end and switching tube S5 of electric capacity C2
Colelctor electrode be connected, the emitter stage of switching tube S5, the colelctor electrode of switching tube S9, the anode of diode D1, one end of electric capacity C3
Be connected with the different name end of the second vice-side winding N3, the other end of electric capacity C3, one end of electric capacity C4, the emitter stage of switching tube S7 and
The different name end of the first vice-side winding N2 is connected, the colelctor electrode of the other end, the negative electrode of diode D1 and switching tube S6 of electric capacity C4
It is connected；The emitter stage of switching tube S9, the colelctor electrode of switching tube S10 are connected with one end of output inductor Lf, output filter
The other end of ripple inductance Lf is connected with one end of output filter capacitor Cf, the other end of output filter capacitor and the collection of switching tube S7
Electrode, the emitter stage of switching tube S8 are connected.
Switch on the basis of above-described embodiment, in another embodiment of the present invention, in the preceding stage high frequency inverter circuit
Pipe S1 is identical with the drive circuit of switching tube S4, and switching tube S2 is identical with the drive circuit of switching tube S3, the driving of switching tube S1
Signal is complementary with the drive signal of switching tube S2, and the dutycycle of the drive signal of switching tube S1, S2, S3 and S4 is 0.01-0.99
Between, dc source is converted to into dutycycle and is transferred to high-frequency isolation transformer for the high-frequency alternating current between 0.01-0.99
Former limit, makes high-frequency isolation transformer operating magnetic field flux with regard to origin symmetry, to improve the utilization rate of high-frequency isolation transformer.Preferably
It is that the dutycycle of the drive signal of described switching tube S1, S2, S3 and S4 is 0.5, and dc source is converted to into dutycycle for 0.5
High-frequency alternating current be transferred to the former limit of high-frequency isolation transformer, make high-frequency isolation transformer operating magnetic field flux with regard to origin symmetry,
To improve the utilization rate of high-frequency isolation transformer.
On the basis of above-described embodiment, in another embodiment of the present invention, first primary side winding N1 and the first secondary
The turn ratio of winding N2 and the first primary side winding N1 are identical with the turn ratio of the second vice-side winding N3, and high-frequency isolation transformer is by original
Side high frequency voltage is with no-load voltage ratio as 1：The mode of N is transferred to two vice-side windings of high-frequency isolation transformer, feels in vice-side winding
High-frequency electrical of the two-way with width homophase should be gone out.
Single stage type inverter concrete operating principle based on High Frequency Link of the present invention is as follows, when switching tube S2 and switch
Pipe S3 is turned on, when switching tube S1 and switching tube S4 are turned off, the first vice-side winding N2 and the second secondary of high-frequency isolation transformer around
The Same Name of Ends of group N3 induces the different name end of positive voltage, high-frequency isolation transformer the first vice-side winding N2 and the second vice-side winding N3
Negative voltage is induced, high-frequency isolation transformer rear class equivalent circuit is as shown in Figure 2；The driving of rear class absorbing circuit breaker in middle pipe S6
Signal keeps identical with the drive signal of second switch pipe S2 and the 3rd switching tube S3, electric capacity C1 and switch in rear class absorbing circuit
Pipe S10 anti-paralleled diodes, switching tube S9 anti-paralleled diodes and the second vice-side winding N3 constitute loop, rear class absorbing circuit electricity
Hold C4 and constitute loop, rear class absorbing circuit electric capacity C3 and switching tube with switching tube S6 anti-paralleled diodes, the first vice-side winding N2
S10 anti-paralleled diodes, switching tube S9 anti-paralleled diodes and the first vice-side winding N2 constitute loop, rear class absorbing circuit electric capacity
The loop that C1, electric capacity C4 and electric capacity C3 are each located can effectively absorb the peak voltage of high-frequency isolation transformer.
When switching tube S1 and switching tube S4 is turned on, and switching tube S2 and switching tube S3 is turned off, high-frequency isolation transformer first
The Same Name of Ends of vice-side winding N2 and the second vice-side winding N3 induces negative voltage, high-frequency isolation transformer the first vice-side winding N2 and
The different name end of the second vice-side winding N3 induces positive voltage, and high-frequency isolation transformer rear class equivalent circuit is as shown in Figure 3；Rear class is inhaled
Receive circuit breaker in middle pipe S5 drive signals and keep identical with the drive signal of switching tube S1 and switching tube S4, rear class absorbing circuit electricity
Hold C2 and constitute loop, rear class absorbing circuit electric capacity C3 and switching tube with switching tube S5 anti-paralleled diodes, the second vice-side winding N3
S7 anti-paralleled diodes, switching tube S8 anti-paralleled diodes and the second vice-side winding N3 constitute loop, rear class absorbing circuit electric capacity
C4 and diode D1, switching tube S7 anti-paralleled diodes, switching tube S8 anti-paralleled diodes and the second vice-side winding N3 are constituted back
Road, the loop that rear class absorbing circuit electric capacity C2, electric capacity C4 and electric capacity C3 are each located can effectively absorb high-frequency isolation transformation
The peak voltage of device, and then improve the quality of output waveform.
On the basis of above-described embodiment, in another embodiment of the present invention, the rear class inverter circuit is modulated using SPWM
Strategy or phase shift modulation are modulated, and wherein switching tube S7 is identical with the drive signal of switching tube S10, switching tube S8 and switching tube
The drive signal of S9 is identical, and the drive signal of switching tube S7 and switching tube S8 is complementary；High-frequency isolation transformer vice-side winding it is same
When name end induces positive voltage, drive signal and the high-frequency isolation transformer vice-side winding Same Name of Ends of rear class inverse switch pipe sense
The drive signal of rear class inverse switch pipe is complementary when going out negative voltage, makes rear class inverter circuit export High ireguency SPWM, High ireguency SPWM Jing
Cross after output filter circuit 5 and be converted to sine wave, be that AC load is powered.
Show through theory analysis and practical experience, volume weight and the confession of the transformer, inductance and electric capacity of electric product
The square root of electric frequency is inversely proportional to, so when operating frequency brings up to high frequency 20KHZ from the 50Hz of power frequency, the body of electrical equipment
Product weight can drop to the 5-10% of power frequency design.Therefore relative to Industrial Frequency Transformer type inverter, high-frequency isolation transformer type
Inverter has small volume, lightweight, low cost and other advantages.Single stage type inverter based on High Frequency Link of the present invention, its
Including the preceding stage high frequency link inverter circuit, high-frequency isolation transformer, rear class absorbing circuit, rear class inverter circuit being sequentially connected and defeated
Go out filter circuit.The single stage type inverter conversion series is less, improves the magnetic core utilization rate of high-frequency isolation transformer and is
System efficiency, realizes the electrical isolation of converter, reduces output filtering volume and weight.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of single stage type inverter based on High Frequency Link, it is characterised in that including the preceding stage high frequency link inversion electricity being sequentially connected
Road, high-frequency isolation transformer, rear class absorbing circuit, rear class inverter circuit and output filter circuit, wherein,
The preceding stage high frequency inverter circuit is converted to dc source after high-frequency alternating current, is transferred to the original of high-frequency isolation transformer
Side winding；
The high-frequency isolation transformer is by primary side winding high frequency voltage with no-load voltage ratio as 1：The mode of N is transferred to high-frequency isolation transformer
Two vice-side windings, produce two-way with width homophase high-frequency electrical；
The rear class absorbing circuit is connected across between two vice-side windings of the high-frequency isolation transformer, for absorbing transformer
Spike and give rear class inverter circuit provide afterflow passage；
The high-frequency alternating current of two vice-side windings of the high-frequency isolation transformer is converted to SPWM and is handed over by the rear class inverter circuit
Stream electricity, and it is transferred to output filter circuit；
It is load supplying after the output filter circuit is filtered in SPWM alternating currents.
2. single stage type inverter according to claim 1, it is characterised in that the preceding stage high frequency link inverter circuit includes the
One switching tube (S1), second switch pipe (S2), the 3rd switching tube (S3) and the 4th switching tube (S4)；First switch pipe (S1) and the
Two switching tubes (S2) constitute a half-bridge, and the 3rd switching tube (S3) constitutes a half-bridge with the 4th switching tube (S4)；First switch
Pipe (S1) is identical with the drive signal of the 4th switching tube (S4), the drive signal of second switch pipe (S2) and the 3rd switching tube (S3)
Identical, first switch pipe (S1) drive signal is complementary with second switch pipe (S2) drive signal.
3. single stage type inverter according to claim 2, it is characterised in that the first switch pipe (S1), second switch
Pipe (S2), the 3rd switching tube (S3) and the 4th switching tube (S4) are constituted by IGBT and with its antiparallel diode, wherein two poles
The anode of pipe is connected with the emitter stage of IGBT, and the negative electrode of diode is connected with the colelctor electrode of IGBT.
4. single stage type inverter according to claim 2, it is characterised in that the colelctor electrode of the first switch pipe (S1),
The colelctor electrode of the 3rd switching tube (S3) is connected with the positive pole of dc source, the emitter stage of the second switch pipe (S2), the 4th
The emitter stage of switching tube (S4) is connected with the negative pole of dc source.
5. single stage type inverter according to claim 1, it is characterised in that the high-frequency isolation transformer includes that first is former
Side winding (N1), the first vice-side winding (N2) and the second vice-side winding (N3), first primary side winding (N1) and the first secondary
The turn ratio and the first primary side winding (N1) of winding (N2) is identical with the turn ratio of the second vice-side winding (N3).
6. single stage type inverter according to claim 5, it is characterised in that the first former limit of the high-frequency isolation transformer
The Same Name of Ends of winding (N1) is connected with the emitter stage of the 3rd switching tube (S3) and the colelctor electrode of the 4th switching tube (S4), institute
Open with the emitter stage and second of the first switch pipe (S1) at the different name end for stating the first primary side winding N1 of high-frequency isolation transformer
The colelctor electrode for closing pipe (S2) is connected.
7. single stage type inverter according to claim 5, it is characterised in that the rear class absorbing circuit includes the 5th switch
Pipe (S5), the 6th switching tube (S6), the first diode (D1), the first electric capacity (C1), the second electric capacity (C2), the 3rd electric capacity (C3) and
4th electric capacity (C4)；The emitter stage of the 6th switching tube (S6), one end of the first electric capacity (C1) and the first vice-side winding (N2)
Same Name of Ends be connected, the other end of the first electric capacity (C1), one end of the second electric capacity (C2) and the second vice-side winding (N3) it is same
Name end is connected, and the colelctor electrode of the other end of the second electric capacity (C2) and the 5th switching tube (S5) is connected, the 5th switching tube (S5)
Emitter stage, the anode of the first diode (D1), the different name end phase of one end of the 3rd electric capacity (C3) and the second vice-side winding (N3)
Connection, the other end of the 3rd electric capacity (C3), one end of the 4th electric capacity (C4) are connected with the different name end of the first vice-side winding (N2),
The colelctor electrode of the other end, the negative electrode of the first diode (D1) and the 6th switching tube (S6) of the 4th electric capacity (C4) is connected.
8. single stage type inverter according to claim 7, it is characterised in that the rear class inverter circuit includes the 7th switch
Pipe (S7), the 8th switching tube (S8), the 9th switching tube (S9) and the tenth switching tube (S10)；7th switching tube (S5) and
Eight switching tubes (S8) constitute a half-bridge；9th switching tube (S9) and the tenth switching tube (S10) constitute a half-bridge；It is described
The emitter stage of the 7th switching tube (S7) is connected with the different name end of the first vice-side winding (N2), the collection of the 7th switching tube (S7)
Electrode is connected with the emitter stage of the 8th switching tube (S8), the colelctor electrode and the second vice-side winding of the 8th switching tube (S8)
(N3) Same Name of Ends is connected, and the colelctor electrode of the 9th switching tube (S9) is connected with the different name end of the second vice-side winding (N3)
Connect, the emitter stage of the 9th switching tube (S9) is connected with the colelctor electrode of the tenth switching tube (S10), the tenth switching tube
(S10) emitter stage is connected with the Same Name of Ends of the first vice-side winding (N2), wherein the 7th switching tube (S7) and the tenth is opened
The drive signal identical (S10) of pipe is closed, the 8th switching tube (S8) is identical with the drive signal of the 9th switching tube (S9).
9. the single stage type inverter according to claim 7 or 8, it is characterised in that the 5th switching tube (S5) and the 6th
Switching tube (S6) is made up of IGBT and anti-paralleled diode, and wherein the anode of diode is connected with the emitter stage of IGBT, diode
Negative electrode be connected with the colelctor electrode of IGBT；Or, the 7th switching tube (S7), the 8th switching tube (S8), the 9th switching tube
(S9) it is made up of IGBT and anti-paralleled diode with the tenth switching tube (S10), wherein the emitter stage of the anode of diode and IGBT
It is connected, the negative electrode of diode is connected with the colelctor electrode of IGBT.
10. single stage type inverter according to any one of claim 1 to 9, it is characterised in that the output filter circuit
Including output inductor (Lf) and output filter capacitor (Cf), one end and the 9th switching tube of the output inductor (Lf)
(S9) emitter stage and the colelctor electrode of the tenth switching tube (S10) is connected, the other end of the output inductor (Lf) with it is defeated
Go out one end connection of filter capacitor (Cf), the emitter stage of the other end of the output filter capacitor and the 8th switching tube (S8) and the
The colelctor electrode of seven switching tubes (S7) is connected.
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| CN201611219062.7A CN106655866A (en) | 2016-12-26 | 2016-12-26 | High-frequency chain-based single-stage type inverter |
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| CN201611219062.7A CN106655866A (en) | 2016-12-26 | 2016-12-26 | High-frequency chain-based single-stage type inverter |
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