CN101355297B - Nondestructive buffer circuit for T type converter controllable branch path - Google Patents
Nondestructive buffer circuit for T type converter controllable branch path Download PDFInfo
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- CN101355297B CN101355297B CN2008102226967A CN200810222696A CN101355297B CN 101355297 B CN101355297 B CN 101355297B CN 2008102226967 A CN2008102226967 A CN 2008102226967A CN 200810222696 A CN200810222696 A CN 200810222696A CN 101355297 B CN101355297 B CN 101355297B
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Abstract
The invention discloses a lossless snubber circuit for a T-shaped converter. In the circuit, a longitudinal axis of the T-shaped converter is formed by connecting 2k capacitors in series; a cross axis of the T-shaped converter is formed by k bidirectional controllable switch units; unidirectional rectifier circuits flowing to the longitudinal axis from the cross axis are formed by unidirectional switches between nodes among the bidirectional switches and corresponding nodes of the capacitors of the longitudinal axis, and the corresponding unidirectional rectifier circuits on upper and lower parts of the longitudinal axis are opposite in direction; k is a positive integral; a buffer cell (SnTk) on a controllable circuit above the cross axis is formed by diodes (SnTD1and SnTD2) and a capacitor (CnTk); the anode of the diode (SnTD1) is connected with the cathode of the diode (SnTD2); the cathode of the diode (SnTD1) is connected with the anode of an antiparallel diode of a controllable switch (STk1); the anode of the diode (SnTD2) is connected with nodes of the capacitors (CTk and CT(k-1))on the longitudinal axis; one end of a capacitor (CnTk) in buffer capacitors is connected with the anode of the diode (SnTD1) while the other end is connected with the cathode of the antiparallel diode of the controllable switch (STk1); and the buffer cell on the controllable circuit under the cross axis can be obtained in dual mode.
Description
Technical field
The present invention relates to a kind of buffer circuit, particularly a kind of harmless type buffer circuit that is applicable to gate-controlled switch on the T code converter controllable branch path.
Background technology
When the traditional type that diminishes absorption circuit is stored in the energy of circuit stray inductance when absorbing the switching of switching tube state, can introduce unnecessary energy loss, reduce the efficient of system; Traditional harmless type absorbs circuit fails to be optimized according to the design feature of T code converter, and components and parts are more, increased complexity.
Summary of the invention
Technical problem to be solved by this invention is: the buffering that solves gate-controlled switch on the T code converter controllable branch path absorbs problem, and simple and reliable solution is provided.
In order to achieve the above object, technical scheme of the present invention is as follows:
Constitute the longitudinal axis of T code converter by 2k capacitances in series; Bidirectional switch k two-way controllable switch unit constitutes the transverse axis of T code converter; Between the node of longitudinal axis the first half electric capacity of node between the bidirectional switch and correspondence unidirectional rectification branch road is arranged, between the node of the node between the bidirectional switch and corresponding longitudinal axis the latter half electric capacity is to constitute the unidirectional rectification branch road that flows to transverse axis from the longitudinal axis by single-way switch, opposite with the direction of aforesaid rectification branch road; K is a positive integer; Buffer circuit is made of two diodes and an electric capacity, a diode of the buffer capacitor of transverse axis the first half branch road and an electric capacity are pressed traditional approach and are constituted the absorption circuit, by the another one diode energy is returned electric capacity on the longitudinal axis, the diode anode that energy returns connects the cold end of corresponding longitudinal axis electric capacity; Diode of the buffer capacitor of transverse axis the latter half branch road and electric capacity are pressed traditional approach and are constituted and absorb circuit, by the another one diode energy are returned electric capacity on the longitudinal axis, and the diode cathode that energy returns connects the hot end of corresponding longitudinal axis electric capacity.
Beneficial effect of the present invention:
Adopt less components and parts, according to the characteristics of T code converter, constitute harmless type and absorb circuit, do not increasing system complexity, do not reducing under the situation of system effectiveness, the buffering that solves gate-controlled switch on the controllable branch path absorbs problem.
Description of drawings
Fig. 1 is the application at the T code converter of lossless absorption circuit that the present invention announced.
Fig. 2 is the buffer circuit configuration figure of T code converter transverse axis with the top controllable branch path.
Fig. 3 is the buffer circuit configuration figure of T code converter transverse axis with the lower part controllable branch path.
Embodiment
The invention will be further described in conjunction with the accompanying drawings:
Application number is: 200810118834.7, and denomination of invention is: can realize the topological structure of the multi-level T type converter of rectification and inversion, the circuit of record is as follows: pass through capacitor C
T1, C
T2C
T (k-1), C
Tk, C
B1, C
B2C
B (k-1), C
BkBe total to the longitudinal axis that 2k capacitances in series constitutes the T code converter; Bidirectional switch S
1, S
2S
K-1, S
kConstitute the transverse axis of T code converter; Have by single-way switch S between the node of longitudinal axis the first half electric capacity of node between the bidirectional switch and correspondence
Ti1, S
Ti2S
Ti (2i)Formation is from the unidirectional rectification branch road of transverse-axis-flow to the longitudinal axis, is by single-way switch S between the node of the node between the bidirectional switch and corresponding longitudinal axis the latter half electric capacity
Bi1, S
Bi2S
Bi (2i)Formation flows to the unidirectional rectification branch road of transverse axis from the longitudinal axis, and is opposite with the direction of aforesaid rectification branch road; K is a positive integer.
Based on above-mentioned two-way T code converter, transverse axis is with the buffer cell S on the controllable branch path on top
NTkBy diode S
NTD1, S
NTD2And capacitor C
NTkConstitute diode S
NTD1Anode and diode S
NTD2Negative electrode connect diode S
NTD1Negative electrode and controllable switch S
Tk1The anode of inverse parallel diode links to each other, diode S
NTD2Anode and the longitudinal axis on capacitor C
Tk, C
T (k-1)Node link to each other; Capacitor C in the buffer capacitor
NTkOne end and diode S
NTD1Anode link to each other the other end and controllable switch S
Tk1The negative electrode of inverse parallel diode links to each other.
Based on above-mentioned two-way T code converter, transverse axis is with the buffer cell S on the controllable branch path of lower part
NBkBy diode S
NBD1, S
NBD2And capacitor C
NBkConstitute diode S
NBD1Negative electrode and diode S
NBD2Anode connect diode S
NBD1Anode and controllable switch S
Bk1The negative electrode of inverse parallel diode links to each other, diode S
NBD2Negative electrode and the longitudinal axis on capacitor C
Bk, C
B (k-1)Node link to each other; Capacitor C in the buffer capacitor
NBkOne end and diode S
NBD1Negative electrode link to each other the other end and controllable switch S
Bk1The anode of inverse parallel diode links to each other.
Transverse axis with the course of work of the buffer cell on the controllable branch path on top with S
NTkFor example is analyzed:
Work as controllable switch S
Tk1During shutoff, the energy sense of current that is stored in stray inductance can not suddenly change, the switch S in its circulation path
Tk1Become capacitor C
NTk, diode S
NTD1, other paths are constant.At this moment, capacitor C
NTkBe recharged, when its voltage is charged to capacitor C
TkMagnitude of voltage the time, diode S
NTD2Conducting, the energy of buffer circuit shifts to output capacitance.
Transverse axis with the course of work of the buffer cell on the controllable branch path of lower part with S
NBkFor example is analyzed:
Work as controllable switch S
Bk1During shutoff, the energy sense of current that is stored in stray inductance can not suddenly change, the switch S in its circulation path
Bk1Become capacitor C
NBk, diode S
NBD1, other paths are constant.At this moment, capacitor C
NBkBe recharged, when its voltage is charged to capacitor C
NBkMagnitude of voltage the time, diode S
NBD2Conducting, the energy of buffer circuit shifts to output capacitance.
Fig. 2 is the buffer circuit configuration figure of T code converter transverse axis with the top controllable branch path.Fig. 3 is the buffer circuit configuration figure of T code converter transverse axis with the lower part controllable branch path.Among the figure buffer circuit and coupled branch road, longitudinal axis electric capacity are described by unit form.
Claims (3)
1.T the lossless buffer circuit of code converter controllable branch path, this circuit is characterized in that: pass through capacitor C based on two-way T code converter
T1, capacitor C
T2Capacitor C
T (k-1), capacitor C
Tk, capacitor C
B1, capacitor C
B2Capacitor C
B (k-1), capacitor C
BkBe total to the longitudinal axis that 2k capacitances in series constitutes the T code converter; Bidirectional switch S
1Bidirectional switch S
K-1, bidirectional switch S
kConstitute the transverse axis of T code converter; The controllable branch path of the circuit topology of two-way T code converter is that the boundary is divided into two groups with the transverse axis, and transverse axis is with the buffer cell S on the controllable branch path on top
NTkBy diode S
NTD1, diode S
NTD2And buffer capacitor C
NTkConstitute diode S
NTD1Anode and diode S
NTD2Negative electrode connect diode S
NTD1Negative electrode and controllable switch S
Tk1The anode of inverse parallel diode links to each other, diode S
NTD2Anode and the longitudinal axis on capacitor C
TkAnd capacitor C
T (k-1)Tie point link to each other; Buffer capacitor C
NTkOne end and diode S
NTD1Anode link to each other the other end and controllable switch S
Tk1The negative electrode of inverse parallel diode links to each other; Transverse axis is with the buffer cell S on the controllable branch path of lower part
NBkBy diode S
NBD1, diode S
NBD2And buffer capacitor C
NBkConstitute diode S
NBD1Negative electrode and diode S
NBD2Anode connect diode S
NBD1Anode and controllable switch S
Bk1The negative electrode of inverse parallel diode links to each other, diode S
NBD2Negative electrode and the longitudinal axis on capacitor C
BkAnd capacitor C
B (k-1)Tie point link to each other; Buffer capacitor C
NBkOne end and diode S
NBD1Negative electrode link to each other the other end and controllable switch S
Bk1The anode of inverse parallel diode links to each other.
2. the lossless buffer circuit of T code converter controllable branch path according to claim 1 is characterized in that: the two ends after each gate-controlled switch on described buffer cell and the controllable branch path or the series connection of a plurality of gate-controlled switch link to each other.
3. the lossless buffer circuit of T code converter controllable branch path according to claim 1 is characterized in that: the lossless buffer circuit of T code converter controllable branch path is applicable to L type booster converter, L type buck converter and the circuit of deriving.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102226967A CN101355297B (en) | 2008-09-23 | 2008-09-23 | Nondestructive buffer circuit for T type converter controllable branch path |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102226967A CN101355297B (en) | 2008-09-23 | 2008-09-23 | Nondestructive buffer circuit for T type converter controllable branch path |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101355297A CN101355297A (en) | 2009-01-28 |
| CN101355297B true CN101355297B (en) | 2011-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102226967A Expired - Fee Related CN101355297B (en) | 2008-09-23 | 2008-09-23 | Nondestructive buffer circuit for T type converter controllable branch path |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108923633A (en) * | 2018-07-10 | 2018-11-30 | 深圳市新威尔电子有限公司 | Switching Power Supply buffer circuit and its power supply buffer module |
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2008
- 2008-09-23 CN CN2008102226967A patent/CN101355297B/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN101355297A (en) | 2009-01-28 |
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| CF01 | Termination of patent right due to non-payment of annual fee |