CN102420538A - Diode clamping seven-level DC-AC (direct current and alternate current) transformation circuit - Google Patents
Diode clamping seven-level DC-AC (direct current and alternate current) transformation circuit Download PDFInfo
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- CN102420538A CN102420538A CN2011103936664A CN201110393666A CN102420538A CN 102420538 A CN102420538 A CN 102420538A CN 2011103936664 A CN2011103936664 A CN 2011103936664A CN 201110393666 A CN201110393666 A CN 201110393666A CN 102420538 A CN102420538 A CN 102420538A
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Abstract
The invention relates to a diode clamping seven-level DC-AC (direct current and alternate current) transformation circuit which consists of two input capacitors Cin1 and Cin2, six self-shutdown devices S1, S2, S3, S4, S5 and S6, two clamping diodes DC1 and DC2 and two transformers T1 and T2 and has the improvement points that 1, the structure is simple, the six-switch construction is adopted to output seven levels, and the S3, the S4, the S5 and the S6 adopt the diodes to carry out clamping voltage sharing; 2, the diode clamping seven-level DC-AC transformation circuit is simple to control, is formed in a mode that a half-bridge circuit and a three-level full-bridge circuit are compounded, and a control method of the diode clamping seven-level DC-AC transformation circuit is mature and reliable; and 3, an output waveform comprises seven levels, the harmonic content in the output waveform can be greatly reduced, and under the same filter condition, the switching frequency can be greatly reduced and the circuit efficiency is improved. The circuit can be widely applied to the field of a photovoltaic inversion grid-connected set and a DC switching power supply.
Description
Technical field
The present invention relates to a kind of many level DC-AC translation circuit, this circuit can be used for photovoltaic inversion and direct-current switch power supply field.
Background technology
Multilevel converter is the hot technology of power electronic technology.In power electronics is used, receive the influence of device voltage quota, the inevitable version that adopts the device series connection in the circuit is for the static state, the dynamic voltage balancing problem that solve the device series connection must be added equalizer circuit.Along with the adding of equalizer circuit and the increase of number of devices, circuit possesses multiple mode of operation and a plurality of output level naturally, and the combination through mode of operation obtains better output characteristic, and Chinese patent 02137803 is one of such technology.But the complicated technology of practicability at present of such circuit structure only is limited to tri-level circuit.
Along with multilevel converter constantly develops; Everybody is for not limiting to and device series circuit itself; And in circuit common, adopt multilevel converter to optimize output waveform, and Chinese patent 200410064935 promptly is the representative of such circuit, the characteristics of this circuit are that half brachium pontis is arranged is three level brachium pontis; It is two level brachium pontis that half brachium pontis is arranged; This circuit is applicable at lower voltage and needs the occasion of higher output waveform quality, and this point and traditional multi-level circuit are inequality, are new application of multi-level circuit.
In order to obtain good output characteristics, hope that output level is The more the better.Traditional view thinks that thereby output level means that the required self-turn-off device of circuit must increase more and causes control complicated, and the circuit practicality reduces.Improving the output level number when how to reduce self-turn-off device, equalizer circuit quantity, is the direction of multi-level circuit development.This patent is to have proposed a kind of diode clamp seven level DC-AC translation circuits along this developing direction.
Summary of the invention
The objective of the invention is to propose a kind of simple in structure, diode clamp seven level DC-AC translation circuits that output level quantity is many, it has solved existing many level DC-AC translation circuit complex structure, technical problem that output level quantity is few.
First kind of technical solution of the present invention is:
A kind of diode clamp seven level DC-AC translation circuits, its special character is to comprise input unit, leading-bridge, lagging leg, clamper unit and output unit; Said input unit comprises the first input capacitance C
In1With the second input capacitance C
In2The said first input capacitance C
In1A wherein end 2 and the second input capacitance C
In2A wherein end connect; The said first input capacitance C
In1The other end 1 high-end as the input of translation circuit, the said second input capacitance C
In2The other end 7 as the input low side of translation circuit; Said leading-bridge comprises the first self-turn-off device S
1With the second self-turn-off device S
2The first self-turn-off device S
1The collector electrode and the first input capacitance C
In1The other end 1 connect; The said first self-turn-off device S
1The emitter and the second self-turn-off device S
2Collector electrode connect; The second self-turn-off device S
2The emitter and the second input capacitance C
In2The other end 7 connect; Said lagging leg comprises the 3rd self-turn-off device S
3, four selfs turn-off device S
4, the 5th self-turn-off device S
5With the 6th self-turn-off device S
6The 3rd self-turn-off device S
3The collector electrode and the first input capacitance C
In1The other end 1 connect; The 3rd self-turn-off device S
3Emitter and four selfs turn-off device S
4Collector electrode connect; Four selfs are turn-offed device S
4Emitter and the 5th self-turn-off device S
5Collector electrode connect; The 5th self-turn-off device S
5Emitter and the 6th self-turn-off device S
6Collector electrode connect; The 6th self-turn-off device S
6The emitter and the second input capacitance C
In2The other end 7 connect; Said clamper unit comprises the first clamp diode D
C1With the second clamp diode D
C2The first clamp diode D
C1The anode and the first input capacitance C
In1A wherein end 2 connect the first clamp diode D
C1Negative electrode and the 3rd self-turn-off device S
3Emitter connect; The second clamp diode D
C2The negative electrode and the first input capacitance C
In1A wherein end 2 connect; The second clamp diode D
C2Anode and the 5th self-turn-off device S
5Emitter connect; Said output unit comprises the first transformer T
1With the second transformer T
2The end of the same name of said first transformer is reverse; The end of the same name of said second transformer is a forward; The first transformer T
1The former limit high-pressure side and the first input capacitance C
In1A wherein end 2 connect its former limit low-pressure end and the first self-turn-off device S
1Emitter connect; The second transformer T
2The former limit low-pressure end and the first self-turn-off device S
1Emitter connect its former limit high-pressure side and four selfs shutoff device S
4Emitter connect; The first transformer T
1The secondary high-pressure side and the second transformer T
2The secondary low-pressure end connect; The said first transformer T
1The secondary low-pressure end and the second transformer T
2The secondary high-pressure side respectively as the output 8 and 9 of translation circuit.
Above-mentioned translation circuit also can comprise floating capacitance Css; A termination the 3rd self-turn-off device S of said floating capacitance Css
3Emitter, another termination the 5th self-turn-off device S
5Emitter.
The above-mentioned first self-turn-off device S
1, the second self-turn-off device S
2Constitute by igbt and diode respectively; The collector electrode of said igbt connects the negative electrode of diode; The emitter of said igbt connects the anode of diode; The gate pole of said igbt connects the conducting and the shutoff of this device of control signal control; Said the 3rd self-turn-off device S
3, four selfs turn-off device S
4, the 5th self-turn-off device S
5With the 6th self-turn-off device S
6Constitute by power field effect pipe and diode respectively; The source electrode of said power field effect pipe connects behind the negative electrode of diode the collector electrode as self-turn-off device; The drain electrode of said power field effect pipe connects behind the anode of diode the emitter as self-turn-off device; The grid of said power field effect pipe connects the conducting and the shutoff of this device of control signal control.
Second kind of technical solution of the present invention is:
A kind of diode clamp seven level DC-AC translation circuits, its special character is to comprise input unit, leading-bridge, lagging leg, clamper unit and output unit; Said input unit comprises the first input capacitance C
In1With the second input capacitance C
In2The said first input capacitance C
In1A wherein end 2 and the second input capacitance C
In2A wherein end connect; The said first input capacitance C
In1The other end 1 high-end as the input of translation circuit, the said second input capacitance C
In2The other end 7 as the input low side of translation circuit; Said leading-bridge comprises the first self-turn-off device S
1, the 7th self-turn-off device S
7, the second self-turn-off device S
2, the 8th self-turn-off device S
8The said first self-turn-off device S
1The collector electrode and the first input capacitance C
In1The other end 1 connect; The first self-turn-off device S
1Emitter and the 7th self-turn-off device S
7Collector electrode connect; The 7th self-turn-off device S
7The emitter and the second self-turn-off device S
2Collector electrode connect; The second self-turn-off device S
2Emitter and the 8th self-turn-off device S
8Collector electrode connect; The 8th self-turn-off device S
8The emitter and the second input capacitance C
In2The other end 7 connect; Said lagging leg comprises the 3rd self-turn-off device S
8, four selfs turn-off device S
4, the 5th self-turn-off device S
5With the 6th self-turn-off device S
6The 3rd self-turn-off device S
3The collector electrode and the first input capacitance C
In1The other end 1 connect; The 3rd self-turn-off device S
3Emitter and four selfs turn-off device S
4Collector electrode connect; Four selfs are turn-offed device S
4Emitter and the 5th self-turn-off device S
5Collector electrode connect; The 5th self-turn-off device S
5Emitter and the 6th self-turn-off device S
6Collector electrode connect; The 6th self-turn-off device S
6The emitter and the second input capacitance C
In2The other end 7 connect; Said clamper unit comprises the first clamp diode D
C1With the second clamp diode D
C2The first clamp diode D
C1The anode and the first input capacitance C
In1A wherein end 2 connect the first clamp diode D
C1Negative electrode and the 3rd self-turn-off device S
3Emitter connect; The second clamp diode D
C2The negative electrode and the first input capacitance C
In1A wherein end 2 connect; The second clamp diode D
C2Anode and the 5th self-turn-off device S
5Emitter connect; Said output unit comprises the first transformer T
1With the second transformer T
2The end of the same name of said first transformer is reverse; The end of the same name of said second transformer is a forward; The first transformer T
1The former limit high-pressure side and the first input capacitance C
In1A wherein end 2 connect its former limit low-pressure end and the 7th self-turn-off device S
7Emitter connect; The second transformer T
2Former limit low-pressure end and the 7th self-turn-off device S
7Emitter connect its former limit high-pressure side and four selfs shutoff device S
4Emitter connect; The first transformer T
1The secondary high-pressure side and the second transformer T
2The secondary low-pressure end connect; The said first transformer T
1The secondary low-pressure end and the second transformer T
2The secondary high-pressure side respectively as the output 8 and 9 of translation circuit.
Above-mentioned translation circuit also can comprise floating capacitance Cfly; The a termination first self-turn-off device S of said floating capacitance Cfly
1Emitter, another termination second self-turn-off device S
2Emitter.
Above-mentioned self-turn-off device (S
1～S
8) constitute by power field effect pipe and diode respectively; The source electrode of said FET connects behind the negative electrode of diode the collector electrode as self-turn-off device; The drain electrode of said FET connects behind the anode of diode the emitter as self-turn-off device; The grid of said FET connects the conducting and the shutoff of this device of control signal control.
Advantage of the present invention:
1) simple in structure.The present invention adopts 6 switch structures to export seven level, S
3, S
4, S
5, S
6Adopt diode clamp all to press.
2) control is simple.Circuit of the present invention is composited by a half-bridge circuit and one three level full-bridge circuit, its control method mature and reliable.
3) output waveform of the present invention contains seven level, can reduce the harmonic content in the output waveform greatly, under identical filter conditions, can reduce switching frequency greatly, improves circuit efficiency.
4) the present invention is at the 3rd self-turn-off device S
3Emitter and the 5th self-turn-off device S
5Emitter between add a little floating capacitance, the intervention of this electric capacity is S
3, S
4, S
5And S
6Resonant energy and path are provided during the change of current, help to improve S
3, S
4, S
5And S
6Soft on off state.
5) the present invention is at the first self-turn-off device S
1The emitter and the second self-turn-off device S
2Emitter between add a floating capacitance and come the clamped three-level branch road, all device S of this circuit then
1To S
8Bear the voltage stress of 1/2 input voltage, this circuit allows to adopt low-voltage device to realize high pressure conversion, therefore is more suitable for high pressure conversion.
6) circuit of the present invention can be widely used in photovoltaic inversion grid connection device and direct-current switch power supply field.
Description of drawings
Fig. 1 is a circuit structure diagram of the present invention.
Fig. 2 be among the embodiment circuit working at 3U
InConducting schematic diagram under the/2k pattern.
Fig. 3 be among the embodiment circuit working at U
InConducting schematic diagram under the/k pattern.
Fig. 4 be among the embodiment circuit working at U
InConducting schematic diagram under the/2k pattern.
Fig. 5 be among the embodiment circuit working at-U
InConducting schematic diagram under the/2k pattern.
Fig. 6 be among the embodiment circuit working at-U
InConducting schematic diagram under the/k pattern.
Fig. 7 be among the embodiment circuit working at-3U
InConducting schematic diagram under the/3k pattern.
Fig. 8 is a circuit output waveform principle schematic among the embodiment.
Fig. 9 is the circuit structure diagram of embodiment 1.
Figure 10 is the circuit structure diagram of embodiment 2.
Figure 11 is adding a little floating capacitance between 6,4 on Fig. 1 circuit base, the intervention of this electric capacity is S
3, S
4, S
5And S
6Resonant energy and path are provided during the change of current, help to improve S
3, S
4, S
5And S
6Soft on off state.
Figure 12 is with S on Fig. 1 circuit base
1Make into by S
1, S
7Series connection is with S
2Make into by S
2, S
8Series connection is also adopted floating capacitance clamped three-level branch road, all device S of this circuit
1To S
8Bear the voltage stress of 1/2 input voltage, this circuit allows to adopt low-voltage device to realize high pressure conversion, therefore is more suitable for high pressure conversion.
Embodiment
A kind of diode clamp seven level DC-AC translation circuits, input side contains the input capacitance C of 2 series connection
In1, C
In2, C
In1, C
In2Be connected in 2; Leading-bridge is by two self-turn-off device S
1, S
2Series connection, S
1Emitter and S
2Collector electrode be connected in 3, S
1Collector electrode and C
In1An end be connected in 1, S
2Emitter and C
In2Connect and 7; The former limit of transformer T1 is connected in 2, between 3, end of the same name is reverse; Lagging leg forms S by 4 self-turn-off device series connection
3Emitter and S
4Collector electrode be connected in 4, S
4Emitter and S
5Collector electrode be connected in 5, S
5Emitter and S
6Collector electrode be connected in 6; Clamping diode D
C1Anode and input capacitance C
In1, C
In2Be connected in 2, clamping diode D
C1Negative electrode and S
3Emitter and S
4Collector electrode be connected in 4; Clamping diode D
C2Negative electrode and input capacitance C
In1, C
In2Be connected in 2, clamping diode D
C2Anode and S
5Emitter and S
6Collector electrode be connected in 6; S
6Emitter and C
In2Connect and 7; The former limit of transformer T1 is connected in 3, between 5, end of the same name is a forward; T
1, T
2The secondary series connection; 1,7 is the input of circuit; 8,9 is the output of circuit.
The photovoltaic DC-to-AC converter that Fig. 9 is made up of diode clamp seven level DC-AC translation circuits, the positive pole of solar cell panel assembly is through the soft circuit (resistance R that opens of resistance
1And K switch
1Parallel connection) back connects with 1 end of translation circuit of the present invention; The negative pole of solar cell battery panel components and translation circuit of the present invention 7 ends link to each other; Circuit output end process filter circuit is (by L
1, L
2, C
1Composition) back links to each other with electrical network.Transformer T among the figure
1, T
2Be Industrial Frequency Transformer.
Its groundwork state is summarized as follows:
Referring to Fig. 2, switch S
2, S
3, S
4Conducting, transformer T
1The voltage that bear at winding two ends, former limit is U
In/ 2; Transformer T
2The voltage that bear at winding two ends, former limit is U
InTransformer secondary series connection output 3U
In/ 2k level;
Referring to Fig. 3, switch S
2, S
4, D
C1Conducting, transformer T
1The voltage that bear at winding two ends, former limit is U
In/ 2; Transformer T
2The voltage that bear at winding two ends, former limit is U
In/ 2; Transformer secondary series connection output U
In/ k level;
Referring to Fig. 4, switch S
2Conducting, transformer T
1The voltage that bear at winding two ends, former limit is U
In/ 2; Transformer T
2The voltage that bear at winding two ends, former limit is 0; Transformer secondary series connection output U
In/ 2k level;
Referring to Fig. 5, switch S
1Conducting, transformer T
1The voltage that bear at winding two ends, former limit is-U
In/ 2; Transformer T
2The voltage that bear at winding two ends, former limit is 0; Transformer secondary series connection output-U
In/ 2k level;
Referring to Fig. 6, switch S
1, S
5, D
C2Conducting, transformer T
1The voltage that bear at winding two ends, former limit is-U
In/ 2; Transformer T
2The voltage that bear at winding two ends, former limit is-U
In/ 2; Transformer secondary series connection output-U
In/ k level;
Referring to Fig. 7, switch S
1, S
5, S
6Conducting, transformer T
1The voltage that bear at winding two ends, former limit is-U
In/ 2; Transformer T
2The voltage that bear at winding two ends, former limit is-U
InTransformer secondary series connection output-3U
In/ 2k level;
When all devices all turn-offed, this circuit was exported 0 level.
Referring to Fig. 8, be this circuit output waveform.
Referring to Figure 10, three-phase alternating-current supply is through diode rectifier circuit (D
In1-D
In6) becoming direct current, DC side is anodal through inductance L
InConnect with 1 end of translation circuit of the present invention; The negative pole of DC side links to each other with 7 ends of translation circuit of the present invention; Circuit output end is through diode rectifier circuit (D
1-D
4) become the dc pulse power supply, through wave filter (L
o, C
o) export load to.Transformer T among the figure
1, T
2Be high frequency transformer.
This circuit working state and waveform and embodiment 1 basically identical.
Claims (6)
1. diode clamp seven level DC-AC translation circuits is characterized in that: comprise input unit, leading-bridge, lagging leg, clamper unit and output unit;
Said input unit comprises the first input capacitance C
In1With the second input capacitance C
In2The said first input capacitance C
In1A wherein end 2 and the second input capacitance C
In2A wherein end connect; The said first input capacitance C
In1The other end 1 high-end as the input of translation circuit, the said second input capacitance C
In2The other end 7 as the input low side of translation circuit;
Said leading-bridge comprises the first self-turn-off device S
1With the second self-turn-off device S
2The first self-turn-off device S
1The collector electrode and the first input capacitance C
In1The other end 1 connect; The said first self-turn-off device S
1The emitter and the second self-turn-off device S
2Collector electrode connect; The second self-turn-off device S
2The emitter and the second input capacitance C
In2The other end 7 connect;
Said lagging leg comprises the 3rd self-turn-off device S
3, four selfs turn-off device S
4, the 5th self-turn-off device S
5With the 6th self-turn-off device S
6The 3rd self-turn-off device S
3The collector electrode and the first input capacitance C
In1The other end 1 connect; The 3rd self-turn-off device S
3Emitter and four selfs turn-off device S
4Collector electrode connect; Four selfs are turn-offed device S
4Emitter and the 5th self-turn-off device S
5Collector electrode connect; The 5th self-turn-off device S
5Emitter and the 6th self-turn-off device S
6Collector electrode connect; The 6th self-turn-off device S
6The emitter and the second input capacitance C
In2The other end 7 connect;
Said clamper unit comprises the first clamp diode D
C1With the second clamp diode D
C2The first clamp diode D
C1The anode and the first input capacitance C
In1A wherein end 2 connect the first clamp diode D
C1Negative electrode and the 3rd self-turn-off device S
3Emitter connect; The second clamp diode D
C2The negative electrode and the first input capacitance C
In1A wherein end 2 connect; The second clamp diode D
C2Anode and the 5th self-turn-off device S
5Emitter connect;
Said output unit comprises the first transformer T
1With the second transformer T
2The end of the same name of said first transformer is reverse; The end of the same name of said second transformer is a forward; The first transformer T
1The former limit high-pressure side and the first input capacitance C
In1A wherein end 2 connect its former limit low-pressure end and the first self-turn-off device S
1Emitter connect; The second transformer T
2The former limit low-pressure end and the first self-turn-off device S
1Emitter connect its former limit high-pressure side and four selfs shutoff device S
4Emitter connect; The first transformer T
1The secondary high-pressure side and the second transformer T
2The secondary low-pressure end connect; The said first transformer T
1The secondary low-pressure end and the second transformer T
2The secondary high-pressure side respectively as the output 8 and 9 of translation circuit.
2. diode clamp seven level DC-AC translation circuits according to claim 1 is characterized in that: also comprise floating capacitance Css; A termination the 3rd self-turn-off device S of said floating capacitance Css
3Emitter, another termination the 5th self-turn-off device S
5Emitter.
3. diode clamp seven level DC-AC translation circuits according to claim 1 and 2 is characterized in that:
The said first self-turn-off device S
1, the second self-turn-off device S
2Constitute by igbt and diode respectively; The collector electrode of said igbt connects the negative electrode of diode; The emitter of said igbt connects the anode of diode; The gate pole of said igbt connects the conducting and the shutoff of this device of control signal control;
Said the 3rd self-turn-off device S
3, four selfs turn-off device S
4, the 5th self-turn-off device S
5With the 6th self-turn-off device S
6Constitute by power field effect pipe and diode respectively; The source electrode of said power field effect pipe connects behind the negative electrode of diode the collector electrode as self-turn-off device; The drain electrode of said power field effect pipe connects behind the anode of diode the emitter as self-turn-off device; The grid of said power field effect pipe connects the conducting and the shutoff of this device of control signal control.
4. diode clamp seven level DC-AC translation circuits is characterized in that: comprise input unit, leading-bridge, lagging leg, clamper unit and output unit;
Said input unit comprises the first input capacitance C
In1With the second input capacitance C
In2The said first input capacitance C
In1A wherein end 2 and the second input capacitance C
In2A wherein end connect; The said first input capacitance C
In1The other end 1 high-end as the input of translation circuit, the said second input capacitance C
In2The other end 7 as the input low side of translation circuit;
Said leading-bridge comprises the first self-turn-off device S
1, the 7th self-turn-off device S
7, the second self-turn-off device S
2, the 8th self-turn-off device S
8The said first self-turn-off device S
1The collector electrode and the first input capacitance C
In1The other end 1 connect; The first self-turn-off device S
1Emitter and the 7th self-turn-off device S
7Collector electrode connect; The 7th self-turn-off device S
7The emitter and the second self-turn-off device S
2Collector electrode connect; The second self-turn-off device S
2Emitter and the 8th self-turn-off device S
8Collector electrode connect; The 8th self-turn-off device S
8The emitter and the second input capacitance C
In2The other end 7 connect;
Said lagging leg comprises the 3rd self-turn-off device S
3, four selfs turn-off device S
4, the 5th self-turn-off device S
5With the 6th self-turn-off device S
6The 3rd self-turn-off device S
3The collector electrode and the first input capacitance C
In1The other end 1 connect; The 3rd self-turn-off device S
3Emitter and four selfs turn-off device S
4Collector electrode connect; Four selfs are turn-offed device S
4Emitter and the 5th self-turn-off device S
5Collector electrode connect; The 5th self-turn-off device S
5Emitter and the 6th self-turn-off device S
6Collector electrode connect; The 6th self-turn-off device S
6The emitter and the second input capacitance C
In2The other end 7 connect;
Said clamper unit comprises the first clamp diode D
C1With the second clamp diode D
C2The first clamp diode D
C1The anode and the first input capacitance C
In1A wherein end 2 connect the first clamp diode D
C1Negative electrode and the 3rd self-turn-off device S
3Emitter connect; The second clamp diode D
C2The negative electrode and the first input capacitance C
In1A wherein end 2 connect; The second clamp diode D
C2Anode and the 5th self-turn-off device S
5Emitter connect;
Said output unit comprises the first transformer T
1With the second transformer T
2The end of the same name of said first transformer is reverse; The end of the same name of said second transformer is a forward; The first transformer T
1The former limit high-pressure side and the first input capacitance C
In1A wherein end 2 connect its former limit low-pressure end and the 7th self-turn-off device S
7Emitter connect; The second transformer T
2Former limit low-pressure end and the 7th self-turn-off device S
7Emitter connect its former limit high-pressure side and four selfs shutoff device S
4Emitter connect; The first transformer T
1The secondary high-pressure side and the second transformer T
2The secondary low-pressure end connect; The said first transformer T
1The secondary low-pressure end and the second transformer T
2The secondary high-pressure side respectively as the output 8 and 9 of translation circuit.
5. diode clamp seven level DC-AC translation circuits according to claim 4 is characterized in that: also comprise floating capacitance Cfly; The a termination first self-turn-off device S of said floating capacitance Cfly
1Emitter, another termination second self-turn-off device S
2Emitter.
6. according to claim 4 or 5 described diode clamp seven level DC-AC translation circuits, it is characterized in that: said self-turn-off device (S
1～S
8) constitute by power field effect pipe and diode respectively; The source electrode of said FET connects behind the negative electrode of diode the collector electrode as self-turn-off device; The drain electrode of said FET connects behind the anode of diode the emitter as self-turn-off device; The grid of said FET connects the conducting and the shutoff of this device of control signal control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110393666 CN102420538B (en) | 2011-12-01 | 2011-12-01 | Diode clamping seven-level DC-AC (direct current and alternate current) transformation circuit |
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| CN 201110393666 CN102420538B (en) | 2011-12-01 | 2011-12-01 | Diode clamping seven-level DC-AC (direct current and alternate current) transformation circuit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104539160A (en) * | 2014-11-29 | 2015-04-22 | 西安爱科赛博电气股份有限公司 | Ultralow-output-voltage-ripple diode-clamped seven-level direct-current converter and direct-current power supply |
| CN109391167A (en) * | 2018-11-15 | 2019-02-26 | 南京工业大学 | A kind of new-type high frequency ozone driver |
| CN111669041A (en) * | 2020-05-28 | 2020-09-15 | 合肥工业大学 | Slow start control method for high-power high step-up ratio direct current converter |
| US11201549B2 (en) | 2018-01-31 | 2021-12-14 | Huawei Technologies Co., Ltd. | Control method of power conversion circuit, and related power conversion circuit |
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| US6747881B2 (en) * | 2001-09-04 | 2004-06-08 | Semikron Elektronik Gmbh | Frequency converter |
| CN1725617A (en) * | 2005-07-21 | 2006-01-25 | 南京航空航天大学 | Zero valtage switch compound crisscross parallel two-tube positive shock three-level DC inverter |
| CN1988346A (en) * | 2006-12-08 | 2007-06-27 | 南京航空航天大学 | PWM combined three level DC converter of Zero voltage switch |
| CN201937492U (en) * | 2011-01-14 | 2011-08-17 | 南京师范大学 | Low-voltage seven-level inverter |
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| US6747881B2 (en) * | 2001-09-04 | 2004-06-08 | Semikron Elektronik Gmbh | Frequency converter |
| CN1725617A (en) * | 2005-07-21 | 2006-01-25 | 南京航空航天大学 | Zero valtage switch compound crisscross parallel two-tube positive shock three-level DC inverter |
| CN1988346A (en) * | 2006-12-08 | 2007-06-27 | 南京航空航天大学 | PWM combined three level DC converter of Zero voltage switch |
| CN201937492U (en) * | 2011-01-14 | 2011-08-17 | 南京师范大学 | Low-voltage seven-level inverter |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104539160A (en) * | 2014-11-29 | 2015-04-22 | 西安爱科赛博电气股份有限公司 | Ultralow-output-voltage-ripple diode-clamped seven-level direct-current converter and direct-current power supply |
| CN104539160B (en) * | 2014-11-29 | 2017-04-19 | 西安爱科赛博电气股份有限公司 | Ultralow-output-voltage-ripple diode-clamped multi-level direct-current converter and direct-current power supply |
| US11201549B2 (en) | 2018-01-31 | 2021-12-14 | Huawei Technologies Co., Ltd. | Control method of power conversion circuit, and related power conversion circuit |
| CN109391167A (en) * | 2018-11-15 | 2019-02-26 | 南京工业大学 | A kind of new-type high frequency ozone driver |
| CN111669041A (en) * | 2020-05-28 | 2020-09-15 | 合肥工业大学 | Slow start control method for high-power high step-up ratio direct current converter |
| CN111669041B (en) * | 2020-05-28 | 2021-04-27 | 合肥工业大学 | Slow start control method for high-power high step-up ratio direct current converter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102420538B (en) | 2013-11-06 |
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