CN100394685C - Combined two-way power switch with diode clamping circuit - Google Patents
Combined two-way power switch with diode clamping circuit Download PDFInfo
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- CN100394685C CN100394685C CNB2005100296641A CN200510029664A CN100394685C CN 100394685 C CN100394685 C CN 100394685C CN B2005100296641 A CNB2005100296641 A CN B2005100296641A CN 200510029664 A CN200510029664 A CN 200510029664A CN 100394685 C CN100394685 C CN 100394685C
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- way power
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- clamping circuit
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Abstract
The present invention relates to a combined two-way power switch with a diode clamping circuit. On the basis of the existing two-way power switch, a diode clamping circuit which is composed of two diodes, a resistor and a capacitor is added, wherein the resistor is connected in parallel with the capacitor, one end of the resistor and the capacitor, which are connected in parallel, is connected with cathodes of the two diodes, the other end is connected with a common source of the two-way power switch, the anode of the first diode is connected with a drain electrode of the two-way power switch, and the anode of the second diode is connected with the other drain electrode of the two-way power switch. The present invention adopts the diode clamping circuit which is connected with leading wires of points of the two-way power switch, momentary high voltage which is generated by the intermittent electric current and the distributed inductance can be buffered, the power switch is protected from being damaged by the over voltage, and simultaneously, the electromagnetic interference intensity of a power converter system can be lowered. The present invention has the characteristics of simple structure design, good buffering effect, low additional cost, strong universality, etc.
Description
Technical field
The present invention relates to a kind of combined two-way power switch with diode clamping circuit, relate in particular to a kind of combined two-way power switch that is applicable to the band diode clamping circuit of power converters such as various frequency converters, matrix converter, can satisfy more high-power following converter applications occasion.
Background technology
In view of the fast development of manufacture technique of power electronic device and Technics of Power Electronic Conversion technology, the research and development of power converter more and more are subjected to the attention of each side.Up to the present, the power electronic product kind is various day by day, and performance is good day by day, has been deep into different social sectors, has obtained good economic benefit and social benefit.Wherein there is a class power converter need use two-way power switch, as frequency converter, matrix converter and their derivation converter.The input voltage of this class power converter is generally interchange, they have good property, as input power factor adjustable or unity power factor, can bidirectional power transmission and power integration density height, belong to green converter, this quasi-converter is accounting for a very important position in the research and development of power converter, and they need to use two-way power switch essentially.The actual at present two-way power switch that uses is by constructing against leading modes such as type switch combination, the combination in parallel with diode of unidirectional power switch, dispersiveness of bringing thus and distributed constant are all very big, cause damages such as power switch over-voltage breakdown, therefore must increase corresponding clamp circuit to combined two-way power switch, absorb and its inner and excessive potential overvoltage that causes of external cabling distributed inductance of balance, the overvoltage of prevention power switch is burnt.But at present still unparalleled matured product to power switch occurs.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, design provides a kind of combined two-way power switch with diode clamping circuit, advantage such as have that simple in structure, with low cost, clamper is good, highly versatile, support are more high-power.
For achieving the above object, the present invention increases a diode clamping circuit on the basis of existing two-way power switch, constitutes the combined two-way power switch of band diode clamping circuit.Two-way power switch is made up of two power diodes, two unidirectional power switches, and diode clamping circuit comprises two diodes, a resistance and an electric capacity, and diode, resistance and electric capacity are connected on the each point lead-in wire of two-way power switch.
In the two-way power switch, first unidirectional power switch and first power diode reverse parallel connection, second unidirectional power switch and second power diode reverse parallel connection, two unidirectional power switches adopt the common source connected mode.In the diode clamping circuit, resistance is in parallel with electric capacity, end after the parallel connection links to each other with the negative electrode of two diodes, the other end after the parallel connection links to each other with the common source of two-way power switch, the anode of a diode links to each other with a drain electrode of two-way power switch, and the anode of another diode links to each other with another drain electrode of two-way power switch.
The diode clamping circuit that the present invention increases on the each point lead-in wire of two-way power switch is the overvoltage clamp circuit, when power inverter moves, if it is interrupted transient current to occur on these aspects, clamp circuit can buffer current interrupted and distributed inductance exist and the instantaneous high pressure of generation, prevent that power switch is owing to overvoltage damages.
The advantage that the present invention has is safe and reliable, the bulking property price ratio is high, wherein diode clamping circuit has that project organization is simple, buffering effect is good, fringe cost is cheap and feature such as highly versatile, can reduce the electromagnetic interference intensity of electric converting system, satisfy more high-power following power inverter application scenario.The present invention is applicable to the overvoltage clamper use of two-way power switch in the various power inverters, has wide application prospect.
Description of drawings
Fig. 1 is circuit theory diagrams of the present invention.
Fig. 2 is applied to embodiment circuit theory diagrams in the matrix form rectifier for the present invention.
Embodiment
Below in conjunction with drawings and Examples technical scheme of the present invention is further described.Following examples are to further specify of the present invention, and do not constitute limitation of the invention.
The combined two-way power switch of the band diode clamping circuit of the present invention's design as shown in Figure 1, on the basis of existing two-way power switch 1, increase a diode clamping circuit 2, two-way power switch 1 is made up of two power diode D1, D2, two unidirectional power switch S 1, S2, diode clamping circuit 2 comprises two diode D3, D4, a resistance R 1 and a capacitor C 1, and diode D3, D4, resistance R 1 and capacitor C 1 are connected on the each point lead-in wire of two-way power switch.
In the two-way power switch 1, unidirectional power switch S 1 and power diode D1 reverse parallel connection, the drain electrode of S1 links to each other with the negative electrode of D1, and the source electrode of S1 links to each other with the anode of D1.Unidirectional power switch S 2 and power diode D2 reverse parallel connection, the drain electrode of S2 links to each other with the negative electrode of D2, and the source electrode of S2 links to each other with the anode of D2.The S1 source electrode links to each other with the tie point of S2 source electrode with the D1 anode with the tie point of D1 anode.S1 and S2 belong to the common source connected mode.
In the diode clamping circuit 2, resistance R 1 is in parallel with capacitor C 1, end after the parallel connection links to each other with the negative electrode of D4 with two diode D3, the other end after the parallel connection links to each other with the common source of two-way power switch, promptly the source electrode with the anode of two power diode D1, D2, two unidirectional power switch S 1, S2 links to each other, the anode of first diode D3 links to each other with a drain electrode of two-way power switch, promptly link to each other with the negative electrode of D1, the drain electrode of S1, the anode of second diode D4 links to each other with another drain electrode of two-way power switch, promptly links to each other with the negative electrode of D2, the drain electrode of S2.
Operation principle of the present invention is:
(1) if occurs near the drain electrode of the negative electrode of D1 and S1 because the instantaneous overvoltage that discontinuous current and distributed inductance cause or owing to the overvoltage in other source, then D3, R1 and C1, D1 constitute the loop, discharge this overvoltage;
(2) if occur near the drain electrode of the negative electrode of D2 and S2 because the instantaneous overvoltage that discontinuous current and distributed inductance cause or owing to the overvoltage in other source, then D4, R1 and C1, D2 constitute the loop, discharge this overvoltage;
(3) if occur near the source electrode of the anode of D1 and S1 because the instantaneous overvoltage that discontinuous current and distributed inductance cause or because the overvoltage in other source, then D1, D3, R1 and C1 formation loop discharge this overvoltage;
(4) if occur near the source electrode of the anode of D2 and S2 because the instantaneous overvoltage that discontinuous current and distributed inductance cause or because the overvoltage in other source, then D2, D4, R1 and C1 formation loop discharge this overvoltage;
(5) R1 and C1 constitute absorption circuit, can discharge C1 and go up energy stored, and the C1 energy that resets is prepared for continuing clamper.
Diode clamping circuit among the present invention is an adjunct circuit; only need two diodes, a resistance and an electric capacity; can be by power diode D1 and the D2 in the two-way power switch circuit; overvoltage cushions to the two-way power switch each point, reaches the protection two-way power switch and guarantees the purpose that power inverter can operate as normal.
In the above-mentioned device, the precision of resistance R 1, capacitor C 1 is not done requirement, and resistance R 1 is a power resistor, and resistance is from 47k Ω～470k Ω.The stray inductance content of capacitor C 1 is low, and the appearance value is 0.1 μ F～4.7 μ F, and electric pressure is higher than the electric pressure of described two-way power switch.Diode D3 and D4 are the oppositely fast power diode that recovers, and can bear big electric current, and oppositely withstand voltage is identical with the electric pressure of described two-way power switch.
S1 in the two-way power switch and D1, S2 and D2 also can constitute one respectively against leading the type power switch, become an independent power device.Such two-way power switch can be formed according to the common source connected mode against leading the type power switch by two.
Fig. 2 is applied in embodiment in the matrix form rectifier for combined two-way power switch of the present invention.
By shown in Figure 2, the matrix form rectifier requires the input three-phase alternating voltage, exports cross streams voltage or one road direct voltage, and its input side and outlet side generally respectively are provided with a filter.Three-phase alternating current is input as ua, ub and uc, and three-phase alternating current is ua ', ub ' and uc ' after the filtering.Single phase alternating current (A.C.) is output as up ' and un ', and filtered single phase alternating current (A.C.) is output as up and un.
Adopt six combined two-way power switch in the matrix form rectifier, distribute according to the H bridge, amount to three brachium pontis, per two combined two-way power switch constitute a brachium pontis, the mid point of each brachium pontis connects an input mutually, the output of three combined two-way power switch of last brachium pontis links together, a utmost point that connects cross streams output or the output of one road direct current, the output of three combined two-way power switch of following brachium pontis links together, and connects another utmost point of cross streams output or the output of one road direct current.
Obviously, the combined two-way power switch of band diode clamping circuit of the present invention not only can be carried out voltage clamp to each two-way power switch nearby, and a brachium pontis also can constitute buffer loop between two two-way power switch up and down, also can cushion mutually between three brachium pontis, thereby reach combination clamper voltage function, the electromagnetic interference intensity that reduces power inverter also there is purposes.
Claims (2)
1. combined two-way power switch with diode clamping circuit, comprise by two power diode (D1, D2), two unidirectional power switch (S1, S2) two-way power switch of Zu Chenging, it is characterized in that increasing by one by first diode (D3), second diode (D4), the diode clamping circuit that resistance (R1) and an electric capacity (C1) are formed, resistance (R1) is in parallel with electric capacity (C1), end after the parallel connection links to each other with the negative electrode of first diode (D3) and the negative electrode of second diode (D4), the other end after the parallel connection links to each other with the common source of described two-way power switch, the anode of first diode (D3) links to each other with a drain electrode of described two-way power switch, and the anode of second diode (D4) links to each other with another drain electrode of described two-way power switch; Described resistance (R1) is power resistor, resistance is from 47k Ω～470k Ω, the appearance value of described electric capacity (C1) is 0.1 μ F～4.7 μ F, described first diode (D3) and second diode (D4) are the oppositely fast power diode that recovers, and oppositely withstand voltage is identical with the electric pressure of described two-way power switch.
2. the application of the combined two-way power switch of the band diode clamping circuit of claim 1, it is characterized in that constituting the matrix form rectifier by six combined two-way power switch, six combined two-way power switch distribute according to the H bridge, amount to three brachium pontis, per two combined two-way power switch constitute a brachium pontis, the mid point of each brachium pontis connects an input mutually, the output of three combined two-way power switch of last brachium pontis links together, a utmost point that connects cross streams output or the output of one road direct current, the output of three combined two-way power switch of following brachium pontis links together, and connects another utmost point of cross streams output or the output of one road direct current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100296641A CN100394685C (en) | 2005-09-15 | 2005-09-15 | Combined two-way power switch with diode clamping circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100296641A CN100394685C (en) | 2005-09-15 | 2005-09-15 | Combined two-way power switch with diode clamping circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1744415A CN1744415A (en) | 2006-03-08 |
| CN100394685C true CN100394685C (en) | 2008-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100296641A Expired - Fee Related CN100394685C (en) | 2005-09-15 | 2005-09-15 | Combined two-way power switch with diode clamping circuit |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9397584B2 (en) * | 2013-09-25 | 2016-07-19 | Eaton Corporation | Multi-level converter apparatus and methods using clamped node bias |
| CN113252210A (en) * | 2021-05-06 | 2021-08-13 | 四川瑞霆电力科技有限公司 | Intelligent monitoring system and method applied to high-voltage side of transformer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6137703A (en) * | 1999-11-23 | 2000-10-24 | Otis Elevator Company | Clamped bidirectional power switches |
| CN1350719A (en) * | 1999-05-12 | 2002-05-22 | 奥蒂斯电梯公司 | Control of a DC matrix converter |
| CN1361584A (en) * | 2000-12-28 | 2002-07-31 | 北京通力环电气股份有限公司 | Multiple-level clamping DC converter |
-
2005
- 2005-09-15 CN CNB2005100296641A patent/CN100394685C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1350719A (en) * | 1999-05-12 | 2002-05-22 | 奥蒂斯电梯公司 | Control of a DC matrix converter |
| US6137703A (en) * | 1999-11-23 | 2000-10-24 | Otis Elevator Company | Clamped bidirectional power switches |
| CN1361584A (en) * | 2000-12-28 | 2002-07-31 | 北京通力环电气股份有限公司 | Multiple-level clamping DC converter |
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| Publication number | Publication date |
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| CN1744415A (en) | 2006-03-08 |
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